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Process parameter transmitter having acceleration sensor

IPC classes for russian patent Process parameter transmitter having acceleration sensor (RU 2450311):
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FIELD: physics.

SUBSTANCE: process parameter transmitter for use in a system for controlling or monitoring a production process has a transmitter housing and a process parameter sensor, having a sensor output signal associated with the process parameter. The accelerometer is connected to the transmitter and provides an accelerometer output signal associated with acceleration. The diagnostic circuit provides a diagnostic output signal as a function of the sensor output signal and the accelerometer output signal.

EFFECT: improved diagnosis in systems for controlling or monitoring a production process to identify faulty components or components which are worn out or are in the process of breaking down.

41 cl, 4 dwg

 

The prior art inventions

The present invention relates to transmitters of the process parameter. More specifically the present invention relates to transmitters of this type, which are used to control or to monitor production processes.

Production processes are used in industrial production. There are different types of field devices, which are used to monitor the process. For example, the process parameters such as pressure, flow, temperature and others can be measured. In addition to using this information to monitor the process parameters of the process can be used to control the process.

The process parameters are measured using field devices, known in General as transmitters of process parameters. In many cases it is desirable to diagnose the operation of the production process and to identify the state of the process and associated equipment. For example, diagnosis can be used to identify the failure in the production process, for example, when the failed components can be replaced. Other diagnostic use include identification of imminent failure before it happens. This allows you to replace or repair the component at the treb is radiated without binding process is complete.

Detection of vibrations is one method used to control the diagnostic process. For example, a vibration sensor such as an accelerometer, may be placed directly in the controller and can be used to detect noise vibration signals generated by the device. For example, there may be noise generated by the electric pump. Vibration is filtered and evaluated by identifying those that exceed the threshold amplitude or who have an abnormal frequency. This may indicate actual or impending failure. Specific examples include sensors placed on the body of the pump or motor, exhaust valves or flanges associated with the control device. Another known method of diagnostics manual is a study in which the operator listens abnormal noise from the control unit. There is a continuing need for improved diagnostic technology in control systems or monitoring the production process to detect failed components and components that have worn out or are in the process of failure. Various techniques are shown in U.S. patent No. 6601005, registered on July 29, 2003, entitled "Process Device Dignostics Using Process Variable Sensor Signal"; publication of the U.S. No. 2005/0072239, published April 7, 2005, entitled "Process Device with Vibration Based Diagnostics", and U.S. patent No. 7010459, issued March 7, 2006, entitled "Process Device Diagnostics Using Process Variable Sensor Signal".

The invention

Transmitter process variable for use in the control system or monitoring the production process includes the body of the transmitter and the sensor of the process parameter, an output signal of the sensor associated with the process parameter. The accelerometer is associated with a transmitter, such as, for example, the transmitter enclosure, sensor option, process or other component, and has an output signal of the accelerometer associated with acceleration. The diagnostic circuit has output a diagnostic signal as a function of the output signal of the sensor and the output signal of the accelerometer.

Brief description of drawings

Figure 1 is a flow chart that includes the transmitter process variable associated with the pipeline system.

Figure 2 is a block diagram of the circuits and components in the transmitter of the process parameter to 1.

Figure 3 is a simplified block diagram of the process for use in implementing the present invention.

Figure 4 is a block diagram showing the simplified steps in accordance with one configuration of the present invention.

In detail, the description

The present invention is a diagnostic method for detecting failure or prediction of imminent failure or reduced performance of the process or process component before failure occurs or reduced performance. Using the present invention are observed vibration in the process and/or device process. Vibration detected and used to predict failure, impending failure or reduced performance of the process or process component, as a function of the detected vibration signal and, optionally, as a function of the detected process parameter.

Figure 1 is a diagram of a system 10 process control, which includes a transmitter setting process 12, connected with the process piping 16. Transmitter process variable 12 is associated with two-wire circuit 18 process control, which operates in accordance with standard Fieldbus, Profibus, or HART®. However, the invention is not limited to these standards, or two-wire configuration. Two-wire circuit 18 controls the process works between the transmitter setting process 12 and the control room 20, and the portable unit 226 configuration illustrated in the embodiment in which the circuit 18 operates in accordance with the HART®Protocol, the contour can transfer current I, which represents the detected process parameter. Optional HART® Protocol allows digital signal superimposed on the current through the circuit 18 so that the digital information can be sent to and received from the transmitter setting process 12. When working in accordance with standard Fieldbus circuit 18 transfers the digital signal and may be associated with multiple field devices, for example, with other transmitters. In one configuration, the circuit 18 includes a wireless circuit, and the transmitter setting process 12 performs communication without the need for additional wiring.

The process parameters typically are the primary parameters that are controlled in the process. When used in this document, the process parameter means any parameter that describes the state of a process, such as, for example, pressure, flow, temperature, level of product yield, pH, turbidity, vibration, position, motor current, any other characteristic of the process, etc. control signal means a signal (different from the process parameter), which is used to manage the process. For example, the control signal indicates the desired value of the process parameter (i.e., the setpoint), such as the required temperature, pressure, flow, level, product yield, pH or turbidity, etc. which the OE is regulated by the controller or used to manage the process. Additionally, the control signal may include reference values, alarms, emergency signal, which is driven element, such as a signal position of the valve, which is provided to the valve drive, energy level, which is the heating element, the signal on/off solenoid, etc. or any other signal which relates to the management process. Diagnostic signal when used in this document includes information related to the operation of the devices and elements in the control loop process, but does not include process parameters or control signals. For example, the diagnostic signals may include the position of the valve stem, the applied torque or force, pressure actuator, the pressure of the compressed gas used to produce the valve, voltage, current, power, resistance, capacitance, inductance, temperature devices, hang-up, friction, position full on and off, stroke, frequency, amplitude, spectrum and spectral components, electrical stiffness, the intensity of the electric or magnetic field, duration, intensity, movement, the back EMF of the electrode is", the motor current, the circuit parameters such as resistance, voltage or current control loop), or any other parameter that can be detected or measured in the system. Moreover, technological signal is any signal that is associated with the process or element in the process, such as process parameter, a control signal or a diagnostic signal. Technological devices include all devices that are part of or are connected with the control circuit process and used for management or monitoring of the process.

Illustrates that the circuit 18 is shown in one configuration, and any suitable control loop process can be used, such as 4-20mA loop, 2, 3 or 4-wire circuit, multi-circuit and the circuit operating in accordance with the HART®, Fieldbus or other digital or analog communication Protocol, including wireless protocols. During operation, the transmitter setting process 12 determines the process parameter, such as flow rate, using the sensor 21 and transmits a specific process parameter through the circuit 18.

In accordance with one embodiment of the present invention, the device process, such as a transmitter setting process 12, includes the impact of the vibration sensor, made with the ability to detect vibrations. The vibration sensor may be any type of vibration sensor such as an accelerometer, but the invention is not limited to such a sensor. The diagnostic circuit in the transmitter process variable 12 or at a remote location monitors detected by the vibration and the detected process parameter and is able to diagnose the failure or impending failure. The output signal may be provided by the transmitter setting process 12, for example, in the control room 20 or device 26 through the two-wire path 18 management process, which provides an indication of the failure or imminent failure of the component process. Using this information, the operator may repair or replace the failed component or to repair or replace the component before its final failure. This allows you to perform any support 10 at a scheduled time or when required, which may be particularly useful if the repair or replacement of a component is to stop the process 10. Additionally, some components may refuse or catastrophically, or in such a way that it will cause damage to other components or cause a release of hazardous substances into the environment. Providing an indication that the component may refuse I shall eat, or looking ahead to the final failure, the component can be repaired or replaced before final failure.

Figure 2 is a diagram showing the transmitter 12 of the process parameter associated with the piping system 16. Vibration 70 is shown passing through the production process. For example, vibration 70 may be carried by the pipeline system 16, the working fluid in the pipe 16 or other physical connections to the transmitter 12 of the process parameter.

The transmitter 12 of the process parameter includes a sensor 72 setting process. The sensor 72 setting process can be performed with the opportunity to discover any type of process parameter, such as flow, pressure, temperature or other Sensor 72 process parameter associated with a circuit 74 measurement, which provides a signal parameter of the process scheme 76 input/output. Scheme 76 I/o is configured to transmit information related to the detected process parameter, two-wire circuit 18 process control. In some embodiments, the implementation of the scheme 76 I/o can also take energy through the circuit 18 process control, which is used to fully energize the circuit and components of the transmitter 12. Scheme 74 measurement is also associated with the diagnostic circuit 82 and provides you with the persecuted, related to the measured process parameter in the camera 82.

Vibration sensor 80 in the transmitter 12 setting process executed with the ability to detect vibration 70 and to provide a signal of the vibration sensor diagnostic circuit 82. Diagnostic scheme 82 monitors 70 vibration detected by the vibration sensor 80, together with the detected process parameter from the sensor 72 provided by the circuit 74 measurements, and has an output signal through the circuit 76 I/o, which provides an indication of the failure or imminent failure of the component process. An alternative scheme I/o can provide an output signal of condition, indicating that the transmitter is working correctly.

In some embodiments, the implementation of vibration diagnostics of the present invention can be used to avoid or reduce equipment downtime by predicting the impending loss of the measurement tool or a management tool, while there is still time to replace or repair the device. Information about vibration may also be provided to other devices that are connected to the circuit 18 process control. For such transmission can be used in data compression algorithms. Diagnostic indication may be provided via a two-wire circuit 18 controls the percent of the catfish. For example, the HART status, FieldBus data or other warnings can be transmitted through the circuit 18. Such a warning may be provided in the control room 20.

Vibration sensor 80 may be any type of vibration sensor. Many vibration sensors work on the same axis and can only detect vibrations along this axis. However, in one embodiment, uses additional sensors or multi-axis sensors to detect vibrations along more than one axis or to profile the vibration at different locations in the device process. Additional detected vibration can be used for diagnostic circuit 82 to provide additional diagnostics. Additional vibration sensors 80 can be placed in more than one place in the transmitter 12 of the process parameter. These additional sensors can also be used to provide additional diagnostic process on the basis of vibration or in parallel, or in combination with the detected process parameter. The diagnostic framework can be extended by means of comparison or analysis of the vibration measurement, either separately or together with the detected process parameter, more than one device process, located in the technological complex. Updat the additional measurements can be used to provide information related to the General status of the process or enterprise. Vibration measurements made close to the device connection process to the process, can be used to detect a characteristic of the process of damage, such as air blow by the sudden closing of the valve, education cavity, aggressive chemical reactions or other disturbances of the process, and actual or impending failure of pumps, rotating equipment, or similar types of failures.

Although the scheme 76 input/output circuit 74 measurement and diagnostic circuit 82 shown as separate components in figure 2, these units of the schemes can be implemented in a shared schema and/or software. For example, many of these functions can be implemented in a digital processor. In addition to the comparison of the detected vibration or accumulated detected vibration, in combination with the process, with a fixed threshold value other diagnostic technology can be applied diagnostic circuit 82. For example, the expert system can be implemented using rules if/then for use in the operation diagnosis based on vibration and the detected process parameter. Diagnosis can be based on the frequency spectrum detected VI the walkie-talkies and process parameters and can be applied to more complex processing, such as neural network, fuzzy logic, etc.

Figure 3 is a block diagram of the device 240 process forming part of the circuit 18. The device 240 shown in common and can include any device process used to implement vibration diagnostics, such as transmitter 12 of the process parameter. The device 240 includes circuit 242 of the I/o connected to the circuit 18 in the contacts 244. The device 240 includes a microprocessor 246 connected to the circuit 242 I/o, memory 248 connected to the microprocessor 246, and a clock connected to the microprocessor 246. The microprocessor 246 receives the input signal 252 process. Block 252 of the input signal process means entering any signal process, and the input to the process may be a process parameter or a control signal and can be taken from the circuit 18 with schema 242 I/o or can be generated internally in the controller 240 of the process.

The device 240 includes an input channel 254 of the sensor. Input channel 254 sensor includes a sensor 21 that detects a parameter of the process and provides an output signal of the sensor amplifier 258, which has an output signal which is digitized by the analog-digital Converter 260. The channel 254 is typically used in transmitters, such as transmitter 12 couples the tra process. The compensating circuit 262 compensate the digitized signal and provides a digitized signal of the process parameter to the microprocessor 246.

In one embodiment, the circuit 242 I/o provides output power to be used to fully energize some or all of the other circuitry in the device 240 of the process, using the energy adopted from the circuit 18. Typical field devices, such as transmitter 12 of the process parameter or the controller 22, feed on energy from the circuit 18, while the device 26 or dispatch 20 have a separate power source. As described above, the block 252 of the input signal process provides the signal process, the microprocessor 246. The signal process may be a process parameter from the sensor 21, the output control signal provided to control diagnostic signal detected by the sensor 80, or control signal, the process parameter or diagnostic signal received via path 18, or signal a process adopted or formed by some other means, such as another channel input/output.

Scheme 276 user input/output is also connected to the microprocessor 246 and provides communication between the device 240 and the user. Typical circuit 276 user I/o includes a display and/or sound card for output and a keyboard or other interface to enter. Scheme 276 I/o can be used to allow the user to watch or to enter a signal process, such as process parameters, control signals (set values, calibration values, warning, emergency, etc).

Figure 3 also illustrates the vibration sensor 80, which may be an individual sensor, or it may contain multiple sensors or components. In one embodiment, the sensor 80 is connected to the microprocessor 246, for example, via an analog-to-digital Converter 290 and the amplifier 292. The microprocessor 246 can watch the detected vibrations together with the signal process, such as a detected process parameter, and to provide an indication of the failure or impending failure of a component of the process. For example, the microprocessor may compare the ratio between the detected vibration together with the process parameter basic value or nominal value. In a similar manner, the output parameter of the process can be compared with the detected vibration to identify the read option, the defective process. This information may be stored in memory 248. Basic and nominal values are subject to change based on the mode of operation of the process or other factors. The base may be a specific frequency range or shape and can be the ü built on a history of observations. Advanced diagnostics performed by the microprocessor 246 may be based on trends in the detected vibration and the detected process parameter. For example, an increase or a gradual or sudden, by time, or periodic spikes or other anomalies in the detected vibration and the detected process parameter can be an indication of a failure or imminent failure of the component process. Similarly, if the ratio between the detected vibration and the detected process parameter is suddenly changed, the microprocessor 246 may provide a diagnostic output signal indicating that the process may refuse or refused. These values, trends or learning profiles can also be stored in memory 248. Diagnosis can be based on a comparison or a more complex mathematical methods, such as empirical average or moving average measurement, fuzzy logic technology, technology, neural networks or technology of expert systems, based on the sequences of rules and/or compared with a threshold value. In various embodiments, the implementation of the ability of the present invention to provide predictive diagnostics can be useful, as it provides time for staff to service component% the SSA prior to final failure.

Figure 3 also illustrates the drummer 291 connected to the microprocessor 246. Drummer 291 may be optional and may contain any item that is made with the ability to accelerate the transmitter 240. For example, the hammer spring drive mechanism can be activated by the microprocessor, solenoid, an electric motor with an offset weight, etc. It can provide a known acceleration signal transmitter 240 and used for diagnosis or in configurations where external sources of acceleration is not available.

Output a diagnostic signal of the present invention can be used to provide an output signal to provide a local indication to the operator or to provide a communication signal for transmission to the control room or other diagnostic alert.

As discussed above, the diagnosis is a function of the methods that apply the detected vibration and the detected process parameter. For example, diagnosis can use trends in the ratios between the signals over a period of time. This information can be compared, the relative signal parameter of the process, with the wear of bearings or the pump components. Advanced diagnostic scheme can be used to match the vibration signals and the detected parameter% the SSA with different procedures or events, which occur during operation of the production process. For example, aggressive chemical reaction can have a specific mode shape of vibration and the associated change in the process parameter. In some embodiments, the implementation of the ratio between the detected process parameter and vibrations, for example changing the relationship between these characteristics may provide an indication on the diagnostic condition, such as a component that fails or otherwise changed in some way.

In one aspect, the output signal from the vibration sensor is used to check the sensor operation of the process parameter. For example, the vibration experienced by the pressure transmitter can be associated with a change in the measured process parameter. This relationship can be observed over time and be used to confirm the correct operation of the sensor process parameter.

Vibration sensor 80 may be any suitable vibration sensor. One known sensor for detecting and measuring vibrations is the accelerometer. There are a number of different methods of measuring accelerations, which are currently used, including capacitive, electrodynamic, piezoelectric, and other Accelerometer generates an output signal which is related to the detection of the Oh vibration. The output signal may have a linear or other relationship with the power of the vibration or frequency of vibration. Another example of a diagnostic sensor can be implemented in a MEMS configuration in which the bracket is used to detect vibration.

Piezoelectric accelerometers are relatively massive and have a wide bandwidth signal, on the order of tens of kilohertz, covering almost the entire audio range. One exemplary sensor available from firms PCB Piezoelectronics and identified as IMI Sensor series 660, which is a family of inexpensive embedded accelerometers. Different configurations are available, including two-wire configuration with and without signal processing and three-wire configuration low power. For example, low-power configuration operates in the extended temperature range and can be installed directly in the processes, which are subject to wide temperature variations. Applied excitation voltage, for example, between 3 and 5 volts DC, and the current through the sensor is approximately 750 µa.

Other exemplary accelerometer is MMA-series, available from Motorola. These accelerometers include various configurations, such as the case of integrated circuits and surface mounting, with temperature compensation, processing and filtering CE is ostogo signal, self-test and fixation failure. These accelerometers use a capacitive detection method, which can be modeled as two stationary plates with a movable plate located between them. The Central plate is deflected from its position of rest when the system undergoes acceleration.

Any suitable type of accelerometer can be used with the present invention. For example, capacitive accelerometer uses the sign of microelectromechanical devices, which creates a variable capacitance that varies in response to acceleration. Piezo electric sensor uses a piezoelectric monitor installed on the device. The acceleration associated with the output voltage of the piezoelectric crystal. Piezo-resistive sensor may, for example, to use the sign of the microelectromechanical device having a resistance that varies in response to acceleration. Sensor Hall effect uses the configuration in which the movement is converted into an electrical signal by detecting changes in magnetic fields. Various types of accelerometers with triple access can be used. For example, one such accelerometer is Okidata ML8950. Another exemplary device is available from analog devices, such as AVXL330.

With OSU accelerometer triple access transmitter in accordance with the present invention can be implemented with the possibility to use two separate measurements for diagnosis. The transmitter of the process parameter may use the output signal from the accelerometer, as well as the output signal from the sensor process variable, such as a pressure sensor. The signals from these two devices can be compared, in order to form a unique system diagnostics. For example, in the pressure transmitter accelerometer can be integrated. The accelerometer can be activated using a manual input, such as with a hammer or other heavy object by the operator. The impact can be directed along the axis of the detected diagram of the pressure sensor. This needlepoint strike force and accelerometer to measure the acceleration, and the pressure sensor to measure the pressure pulse. If both output signals are detected, the diagnosis can confirm the correct operation of the device.

As an additional option, the implementation of the configurations described above, vibrations or other aspects of the output signals of the sensor setting process and the accelerometer can be compared. For example, in some configurations, there may be a linear relationship between the output signal from the pressure sensor and the output signal from the accelerometer in response to an attack or other effect on the transmitter. Changing these reactions can provide an indication of failure, such as loss of fluid or oil-based.

One example is e which is driven by the spring drummer used to provide calibrated blow to the device. However, any desired type of calibrated kick can be used. In this configuration, the force of the blow can be used in the diagnostic algorithm together with the output signals from the sensor of the process parameter and the accelerometer. In an additional configuration, the set of calibrated shocks are applied for use in the diagnosis. For example, can be used punches of different sizes, and the resulting changes in the process parameter and the output signals from the accelerometer can be compared.

In another exemplary configuration, the external energy is used as the source of the "udar". For example, can be used hydraulic shock, pulsation of the pump or mechanical vibration. For example, two different hydraulic shock can be the result of two different comparisons that can be used as a calibration check. It may also provide an indication of the transmitters operate in accordance with the technical specifications.

In another example, the constant vibration causes a shift in the process parameter sensor, such as an offset in the detected pressure. For example, vibration in wet knee, which connects the pressure sensor to the process that causes the pressure sensor to indicate the increased pressure. In some of the which the configurations of the pressure sensor acts as a low pass filter and a rectifier, so ripple is represented as an offset pressure. Process parameter together with the monitored acceleration can be used to perform diagnostics. Additionally tracked acceleration can also be used to compensate for process parameter, so that the displacement caused by the vibration is removed from the measurement of the process parameter, for example, using a microprocessor 246, shown in figure 3.

The accelerometer 80 can be installed in any convenient place. The accelerometer can be mounted on the housing of the transmitter or, for example, directly in the sensor setting process, as, for example, directly to the pressure sensor. However, the pressure sensor is typically isolated in the module pressure and, in some configurations, can be isolated from vibrations, such as blows to the transmitter. Building and placement of the accelerometer can be designed to improve the sensitivity to individual types vibration or other reasons. Technologies for high-speed data capture can be used to obtain a detailed profile of the acceleration detected by the acceleration sensor.

Figure 4 is a simplified block diagram 300 of steps in accordance with one embodiment of the invention. Flowchart 300 begins at step 302, and the process parameter n is observed at step 304. At step 306 is observed acceleration. Steps 304 and 306 may be performed sequentially, in parallel, in reverse order or at any time, including partially overlapping periods of tracking. At step 308 performs diagnostics as a function of the monitored process parameter, as well as the monitored acceleration. This diagnosis can be executed in the microprocessor 246, shown in figure 3, on the basis of software instructions stored in memory 248. Diagnostics can be performed in accordance with any suitable technology, in which two of the monitored values are compared in order to determine the status or approaching a condition of process components, process, devices or elements in the process, etc. Examples include technology rule-based, fuzzy logic technology, technology, neural networks, artificial intelligence technology or other. In one configuration of the monitored acceleration is used by the microprocessor 246 to compensate for errors in the measured process parameter that are brought as a result of acceleration of the transmitter or components associated with the transmitter. For example, the offset in the detected process parameter may be removed in some configurations through the use of the monitored acceleration. At step 310 to provide assetsa optional output signal, related to diagnosis. This output signal can be transmitted to a remote location as desired, for example, through communication via two-wire circuit 18 process control, or using other communication technologies, such as RF or wireless technologies. Additionally, the output signal may be provided locally to the operator or locally nearest equipment such as test equipment, either through wired or wirelessly. At step 312, the procedure stops and need not be repeated, returning to step 302. In one configuration step 306 tracking acceleration involves activating the drummer 391 or other source of acceleration.

In one configuration, the steps illustrated in figure 4, can be activated based on user input. For example, the operator can initiate the flowchart 300, providing a corresponding signal to the transmitter 340 or through communication via the two-wire path 18 process control, or in other ways. In this configuration, the device can be configured with the ability to instruct the operator to apply acceleration to the transmitter 240 at step 306, while acceleration is observed. For example, the operator may be issued a statement to hit the transmitter at a specific location or along a particular axis

The present invention provides a number of ways to perform a diagnostic or compensation in the device process monitoring systems for process control. For example, external influences, or artificial, such as a hammer, or natural, such as hydraulic shock or mechanical vibrations, which cause the acceleration of the device can be measured using the accelerometer. The effect of this acceleration is measured using an accelerometer, such as uniaxial, biaxial or triaxial accelerometer and sensor process parameter, such as a pressure sensor. These two measurements can be used to diagnose the operation of, for example, to check the correct functioning of the transmitter. Other configurations are managed by two of the measured signal, for example the ratio of the two signals can be observed and compared with the calibrated value of external influence in order to verify the operation of the transmitter. Using the ratio of the two signals relative magnitude of the two signals and the magnitude of external effects relative ratios of the values of external influence, additional technologies can be used to test the transmitter. In addition to checking the operation of calibration and compensation can be performed in real-time with p the power of the acceleration signal. Observing and analyzing the signals, the transmitter may provide notice or warning condition. The accelerometer may be located as desired, for example, made near the sensor process parameter, such as pressure sensor, or electronic equipment associated with the sensor. For example, capacitive accelerometer can be integrated in existing or modified analog-to-digital Converter, such as capacitive-to-digital integrated circuit. A three-axis accelerometer can be used to perform multiple functions, including measurement of vibration as a diagnostic tool, the tilt measurement device as a means for automatic compensation of the influence of hydrostatic pressure in the pressure measurement, measurement of the impact on the device compared to its effects on the sensor process parameter for use in the passed inspection and/or measurement of acceleration to compensate for the bias pressure during acceleration. The source of the acceleration can be integrated into the device, such as a spring-loaded mechanism drummer or similar Mechanism may operate by the operator or can be automatically operate the electrical circuit at the transmitter. In another configuration, mechanical or external in Janie pressure joint in the connection process, which connects the transmitter with the production process. The accelerometer can be attached directly to the sensor parameter of the process to create a more predictable correlation between the two signals.

In one configuration, the accelerometer may be configured to measure the frequency in time of the input acceleration. If the acceleration affects the measurement of the process parameter, such as pressure measurement, accuracy, then the measurements made during the intervals of "silence"can be seen as providing greater accuracy. Such a system may, for example, to keep the last "good" value, when the accelerometer measures the input of large acceleration, which may cause an error in measurement. In another example, in some configurations, the increase in measured process parameter, for example the increase in flow rate also corresponds to the increase of vibrations, for example due to the increased pulsation of the pump or a higher magnitude of vibration of the pipeline. The signals from the sensor parameter "pressure" process in the accelerometer can be compared with additional diagnostic data to provide greater confidence in the measured process parameter.

Although the present invention is described with references to preferred options realized what I experts in the art should understand that modifications may be made in form and detail without departure from the spirit and scope of the invention. In some embodiments, implementation of the invention can be implemented in any type of device process. Can use any type of processor, including capacitive accelerometer using the sign of microelectromechanical devices, which creates a modified capacity, associated with acceleration, piezoelectric sensors, using crystal, mounted on the mass, piezoelectric sensors, for example, in which the axis has a resistance that varies with acceleration sensors based on the Hall effect, which is based on the change of magnetic fields, etc. Diagnostic scheme of the present invention may be implemented in any suitable component. For example, a scheme may be implemented in the microprocessor and associated components together with software instructions or may contain other components or options for implementation. The approximate acceleration sensors include capacitive, electrodynamic, piezoelectric, and microelectromechanical systems (MEMS).

1. Transmitter process variable for use in the control system or monitoring of the production process, with the holding:
the sensor process parameter having a sensor output related to the parameter of the process; the accelerometer is connected to the transmitter of the process parameter, an output signal of the accelerometer associated with acceleration;
and
a diagnostic circuit having a diagnostic output signal as a function of comparing the current output of the sensor signal and the current output signal of the accelerometer, the diagnostic output signal indicates the diagnostic status of the device or process component.

2. The device according to claim 1, which includes the transmitter enclosure of the process parameter, and the accelerometer is connected to the housing of the transmitter of the process parameter.

3. The device according to claim 1, in which the accelerometer is located next to the sensor process parameter.

4. The device according to claim 1, wherein the accelerometer includes a three-axis accelerometer.

5. The device according to claim 1, in which the sensor process parameter contains a pressure sensor.

6. The device according to claim 1, comprising a communication scheme which has a capability to connect to the control loop process.

7. The device according to claim 6, in which the diagnostic output signal from the diagnostic scheme is passed by the control loop process.

8. The device according to claim 6, in which the diagnostic output signal refers to a component failure process.

9. The device according to p., which diagnostic output signal is associated with a deterioration of the performance component of the process.

10. The device according to claim 6, in which the diagnostic output signal associated with the impending failure of a component in the process.

11. The device according to claim 1, in which the diagnostic output signal is used to compensate for process parameter.

12. The device according to claim 1, in which output a diagnostic signal based on the rules.

13. The device according to claim 1, in which the diagnostic scheme implements a neural network or fuzzy logic.

14. The device according to claim 1, in which the acceleration sensor is selected from the group of acceleration sensors including capacitive, electrodynamic, piezoelectric, and microelectromechanical systems (MEMS).

15. The device according to claim 1, wherein the diagnostic circuit is configured to control the acceleration applied to the transmitter of the process parameter.

16. The device of clause 15, which includes drummer, performed with the opportunity to hit the transmitter of the process parameter.

17. The device according to claim 1, wherein the accelerometer is configured to detect acceleration applied by the operator.

18. The device according to claim 1, wherein the accelerometer is configured to detect a calibrated acceleration applied to the transmitter of the process parameter.

19. Elimination of the ETS according to claim 1, which diagnostic scheme implemented with the possibility to compare acceleration from more than one calibrated acceleration applied to the transmitter of the process parameter.

20. The device according to claim 1, in which the transmitter setting process executed with a possibility to control the output signal of the process parameter on the basis of the detected acceleration.

21. The device according to claim 1, wherein the accelerometer is configured to detect an external acceleration.

22. The device according to item 21, in which the external acceleration is at least one of the hydraulic shock, pulsation of the pump and the mechanical acceleration.

23. The device according to claim 1, wherein the diagnostic circuit is configured to compensate the output signal of the process parameter on the basis of the detected static acceleration.

24. The device according to claim 1, wherein the accelerometer provides an output signal for use in one of the diagnostics, the compensation setting process or the verify operation.

25. The device according to claim 1, comprising a memory configured to store a process parameter, and in which the transmitter of the process parameter provides an output signal based on the process parameter that is stored in memory as a function of the detected acceleration.

26. The device according to claim 1, wherein the diagnostic output is the function of the previous relationship between the output signal of the sensor and the output signal of the accelerometer.

27. A method for diagnosing operation of the transmitter process variable in the control system of the production process containing the steps are:
detect acceleration applied to the transmitter of the process parameter, using the accelerometer;
measured process parameter and
diagnose the operation of the transmitter of the process parameter or component of the process by comparing the current detected accelerations and current measured process parameter.

28. The method according to item 27, in which the accelerometer is connected to the transmitter enclosure of the process parameter.

29. The method according to item 27, in which the accelerometer is located next to the sensor process parameter.

30. The method according to item 27, in which the accelerometer contains a three-axis accelerometer.

31. The method according to item 27, in which the detected process parameter contains the pressure.

32. The method according to item 27, which includes a stage on which to transmit diagnostic information to the control loop process.

33. The method according to item 27, which diagnosed the work associated with the impending failure of a component in the process.

34. The method according to item 27, which includes a stage on which compensate for process parameter on the basis of stage of diagnosis.

35. The method according to item 27, in which the diagnosis is based on the rules.

36. The method according to item 27, in which the diagnosis is based on neural networks or fuzzy logic.

37. With the persons in item 27, in which the acceleration sensor is selected from the group of acceleration sensors including capacitive, electrodynamic, piezoelectric, and microelectromechanical systems (MEMS).

38. The method according to item 27, which includes a stage at which control the acceleration applied to the transmitter of the process parameter.

39. The method according to item 27, which includes a stage on which detect the acceleration applied by the operator.

40. The method according to item 27, which includes a stage on which detect the calibrated acceleration applied to the transmitter of the process parameter.

41. The method according to item 27, which includes the stages on which retain the option process and provide an output signal based on the stored process parameter as a function of the detected acceleration.

 

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