Automated diagnostic complex

 

The invention relates to the field of measurement technology and is intended for control and fault diagnosis of complex electronic equipment and other functionally complex objects control. The technical result is to increase the reliability and accuracy of diagnostic control and reduction of hardware redundancy diagnostic equipment. This automated diagnostic system includes a test object, the test sources of impacts, measures of output parameters, computers, gauges uncontrollable external influences. 3 Il.

The invention relates to the field of measurement technology and can be used for monitoring and fault diagnosis of electronic equipment, as well as other objects in the control of various functional complexity and different principle.

Known devices for control and diagnostics, including the inspection object 1 (quadrupole), the input test (stimulating) effects 2 (generator control frequency), the output of which is connected to its corresponding point in the input of the control object 1, the meter output informative measure the output of informative parameter of the test object 1. Structural diagram of this device is shown in Fig.1. An example of such a device can serve as a known technical solution for ed. mon. The USSR 587632, CL N 04 3/46, 1978

The device Fig. 1 operates as follows. Before the control on the working copy of the sample is measured reference dependence of informative values of output parameters xiEfrom the values supplied input test (stimulating) effects of injEcharacterizing the reference value of the integral indicator of quality WEthe test object within range (Wmin-Wmaxthe existence of indicators of the quality of the test object. For example, when the control receiving amplifier channel receivers as part of the control unit of Fig. 1 as input source 2 is used, the test generator of high-frequency signals, allowing you to set the required values of the amplitudes UI. As a measure of the output of informative signals, in addition to the Comparer can be used oscilloscope, selective microvoltmeter or other device performing the measurement values of the amplitudes Uothe output signals. Indicator of the quality of W in this case, the range (Uwhen-UVimax) controlled quadrupole (object control). Reference characteristics of the inspection object WE=f(xiE, yjE), pre-measured for the intact sample of the test object within the operating range (the range of existence of its quality Wmin-Wmax), and remember in the future use to control samples of control object type and destination.

The control procedure using the device of Fig.1 includes measuring the current values of the quality index W of the object of control (similar to that described for measuring the reference characteristics of control objects of this type) and the subsequent comparison of measured values of the quality index Wijwith the previously obtained reference values WiyE. If the same points of the operating range (Wmin-Wmax) quality indicators W the test object 1 deviationWijthe measured values of Wijquality indicator (receiver - gaini) from the reference values of WijEdoes not exceed the specified tolerancesWm dthen object >/img>Wijthe measured values of Wijquality indicator control object from the reference valuesijEexceed established tolerancesWm dthe test object shall be rejected. For the normal state of the control object 1 inspection results must satisfy the relationWm d|Wij-Weij| =Wij. The disadvantages of the known control devices are a great complexity of control and the impossibility of its application for monitoring the status of functionally complex objects with multiple points of input test (stimulating) effects of injseveral reference points output informative parametersiand complex functional relationship between the quality parameters W of control objects, the parameters of the stimulating effects of yjand output the informative parameters of xi.

It is also known a device for controlling the amplitude-frequency characteristics of two-port. This device is multi-channel and includes a generator control frequency controlled two-port network, the output of which is connected to the and inputs of bandpass filters group the output of the bandpass filter is connected to one input of the comparison, the other input of which is connected to the generator output control frequency, and the output of the Comparer is connected to the second input of the second amplifier, the outputs of bandpass filters group connected to the first input of the subtraction unit group, the second input is connected with the corresponding generator output control frequency, the output of the subtraction unit is connected to the first input of the corresponding block of the comparison group, a second input connected to the output of the corresponding block of the reference voltage group, the outputs of which are connected to the appropriate input element IKHI, the output of which is connected to the input of the recording unit. (Device for controlling the amplitude-frequency characteristics of two-port auth. mon. 756653 class. N 04 3/46, 1978).

This device is a multichannel, and the generalized block diagram shown in Fig.2. The number of sources 2 test influences xiand measures 3 output parameters yjcorrespond to the number and characteristics of yjmanaged stimulating effects and output information parameters xithis type of test object 1. The composition of the device is as sources 2 test influences is the generator of the control frequency, measures 3 output parameters - amplifier 4, the band-pass filters 7 and blocks subtracting 8, and blocks comparison 5, the blocks of the reference voltage 10 and the recording unit 9 performs the function of specialized computer for signal processing.

The device (Fig. 2), as adopted for the nearest equivalent, works as follows. Before applying device in it simultaneously form an array reference values test (stimulating) effects ofyejand a corresponding array of sample values of the output of informative parametersxeithat is received in the verification process of the reference sample object control (controlled sample with a precisely defined quality parameters Wijcorresponding to the normal state of control objects of this type).

Further, the implementation of quality control procedures samples of control objects of the same type, regular inspection object 1 with unknown quality indicators connect the multi-channel device of Fig.2 to the outputs of the source test influences 2 and to the inputs of the measuring output parameters 3. In accordance with the program and methods of testing objects which give a combination ofyjvalues of the test influences. For each such combinationyjusing the datalogger settings 3 produce the reference populationximeasured values of output parameters, which are entered in the computer. After receiving each of the next array valuexifor a predetermined number of test influencesyjmake a comparison of the measured xiand reference xiEvalues of the same informative parameters. Match measured values xiand reference values xiE(largest variancexi) make a conclusion about the condition of the inspected object control 1 (health or the presence of deviations) and the possibility of its use for the intended purpose.

Advantages of the multi-device control are: the possibility of its application for functionally complex control objects with a large number of stimulating influences yjand a large number of informative parameters xicharacterizing the current state W of the object of control; the Disadvantages Mishneh effectsk(ambient temperature, atmospheric pressure, humidity, external electromagnetic fields, and others) that affect the state of the object of control, which reduces the accuracy of assessing the actual quality indicators; lack of reliable estimates of the equivalent values of the deviationsW quality indicators from the norm and comparing them with predetermined tolerancesWMDthat leads not only to decrease the reliability of the control functionally complex objects, but also to large economic losses due to the large probability of erroneous interpretation of the results of monitoring; hardware redundancy channel implementations stimulating effects and channels measuring output parameters due to the lack of accounting relationships (weighting coefficients) between the parameters (xi, yj, yk) and quality score W of the object of control, which leads to economic losses due to the increased cost of implementing the monitoring device; the lack of clear criteria for the selection of the metrological characteristics of the channels according to specified requirements for accuracy assessment of object control (Wm SS), which leads to lower reliability of the control to the shortcomings of the device of Fig.2, accepted for the nearest equivalent.

This technical result is achieved by the automated diagnostic complex comprised of a test object, the test sources impacts yjconnected the outputs to the corresponding inputs of the control object, the measures of output, inputs connected to corresponding outputs of the control object, an electronic computing machine (computer), control outputs which are connected to the inputs of the source test influences, the inputs of which are connected to the outputs of the measure of output parameters, and the output of the computer is the output of the complex, introduced additional measures uncontrollable external influences ykthe outputs are connected to the corresponding additional inputs ECM inputs connected respectively to the inputs of the control object, and the composition and number of channels of the device correspond to the composition and types of the parameters of the test (managed stimulating) effectsj, uncontrollable external influences inkand output of informative parameters xithis group of objects controls the metrological characteristics of the instrument channels (xi,) to the metrological characteristics of the evaluation of the quality of W this group of objects controls, taking into account the weighting coefficients of the correlation parameters (xi, yj,k) quality indicator W test objectwhereWMD- the criterion of the accuracy of the device (expressed, for example, through the maximum value average standard deviation of the error of the estimate quality indicator W object control)
(xi), (yj), (yk) - - private criteria accuracy of channels xi,j,kdevice (expressed, for example, through the maximum allowable RMS error of the corresponding channel device),
- weighting factors that take into account the relationship of the values of the parameters (xi, yj, yk) and the corresponding value of the quality indicator (state) W test object and the dynamic ranges (xi,yj,ykmeasurements (changes) of the parameters in the channels, which have different rangeW identify quality indicators of this group of objects controls

wherethe dynamic range of possible changes in the values W indicator of the quality of control objects in this group (including taking into account possible failures),
[(xi) = (xImax-xmin)] the dynamic range of possible values of informative parameter xibeing measured by the apparatus of the corresponding channel control device;
[(yj) = (yj-yj)] - dynamic range of possible values of the parameters of the test effectsjsubject formation apparatus corresponding channel control device,
[(yk) = (ykmax-ykmin)] - dynamic range change settings uncontrollable external influences yksubject to consideration by the equipment of the corresponding channel control device, and a relationship [W = f(xi,yj,yk)] between the defined value of W quality indicator (state) onyeama to determine the requirements for metrological characteristics and dynamic range of the instrument channels monitoring device according to the above mentioned ratios, can be in the form of analytical dependency table (tabular) form describe dependencies or any other form that allows you to evaluate the values of weight coefficientscharacterizing the relationship between the values of W quality indicators (status) of the control object and the equivalent values of the relevant parameters (xi, yj, ykuse device control to assess the quality (condition) this group controls.

In Fig. 1 and 2 show diagrams of devices analogues. In Fig.3 shows a structural diagram of an automated diagnostic complex. It contains the control object 1, source 2 test influences yjmeters 3 output parameters, the computer 4, 5 meters uncontrollable external influences yk. Inputs 5 meters uncontrollable external influences and of the control object 1, respectively, are combined and the entrance of the complex. Another group of inputs of the control object are connected respectively to the outputs of sources 2 test influences, the inputs of which are connected with the corresponding outputs of the computer 4, the first and second groups of inputs which are connected respectively to the outputs of the probes 3 output parameters the passages of the meter output parameters 3, and the output of the computer is the output of the complex.

As sources of test impacts depending on the type, the structure of the object and methods of control can be used for software-controlled signal generators, digital-analog converters and other

Output parameters can be measured with appropriate measuring devices 3 and 5, which can be used a standard measuring devices (measuring receivers with digital output, digital oscilloscopes, ADC, signature, and logic analyzers and others), suitable for measuring the informative parameters inherent in this type of test object.

The complex operates as follows.

Before applying complex in its composition as the test object 1 connect the reference object control type. On the basis of a priori known functional relationship between the quality score W test object and the parameters xi,j, ykthe control program embodied in the computer 4, and implements the accepted method of control, with sources 2 served on the inspection object 1 reference collectionyejtest (stimulating) the hr/8721.gif">xeithe output of informative parameters. Simultaneously with measuring 5 get in the computer 4 a set of reference valuesyekuncontrollable external influences. As a result, in the computer 4 will be generated reference parameter array, equivalent to the reference value of the quality indicator WEthe test object 1 according to the ratio WE=f(xiE, yjE, ykE).

For those objects, which this relationship may be represented in the form of analytical expressions, the reference arrays (xei,yej,yekcan be obtained for each given value WEindicator of the inspection object 1 is calculated and entered into the database computer 4 without using reference samples of the test object 1. In this case, the specified analytical ratio plays the role of a reference mathematical model of this type of control object.

After the formation of these methods reference parameter arrays (xei,y

Each test sample of the test object 1 is connected to the sources 2 and 5 meters. Then on the test object 1 by using 2 sources, running the computer 4, issue specified by the program control of the totality of impactsyjcorresponding controlled value of the quality indicator W. using measures 3 make reference to the aggregate of the current values ofxiinformative parameters characterizing the current value ofijkthe quality score of this sample of the test object 1. At the same time with 5 meters receive a set ofykthe current values of the uncontrollable external influences. On the basis of the obtained in the computer 4 set of values (xei,yej,yek) get a rating equivalent to the values of Wijkquality indicator
Wijk= f(xi,yj,k).
Determine the deflectionW measured value of the quality indicator Wijkis the rate of

If a particular control is equivalent to the value of Wijkthe indicator of the quality of the inspection object 1 is different from the corresponding reference values WEmore than the specified tolerances (WMD) on the control objects of this type, the instance of the control object shall be rejected.

In order to diagnose the causes of quality deviation of the test object (Troubleshooting for technical objects, disease diagnostics for monitoring the condition of the patient in medicine) further more detailed qualification status of the object of control is made on the basis of relevant criteria-based diagnostic specimens. With this purpose before use of the device and the database of the computer 4 as the reference arrays (xei,yej,yek) recorded set of parameter values not only for the normal state of the control object of this type, but for different variants of deviation from the norm. Establish correspondence between these sets of values PA is s fault, for medicine - diseases). These together is nothing more than a diagnostic sample of relevant deviations from the norm (corresponding Troubleshooting for technical objects).

In this case, after establishing control of the rejection of this sample inspection object 1 from the normal state into the computer 4 search criteria-based diagnostic image, the set of parameters for which coincides with the measured set. Upon detection of the appropriate diagnostic sample qualify the reason for the rejection properties of the test object 1 from the norm (condition - for technical objects, the type of disease for the patient and determine the remedial measures set deviation (for technical objects formulate guidelines for addressing any kind of failure in medicine formulate recommendations on the methods and means of treatment of diagnosed diseases).

Technical implementation of the elements of the complex is carried out using hardware, based on known technical solutions. The main requirement is the choice of the metrological characteristics of the instrument 2, Appaim characteristics of the equipment 2, 3, 5, and dynamic ranges (formation) would increase the cost of the device - economic losses. Unfounded the underestimation of these requirements will reduce the reliability of control and the consequent economic losses.

For parameter optimization apparatus 2, 3, 5 in the multi-channel device metrological characteristics of channels (xi,yj,yk) must satisfy the set requirements to the metrological characteristics of the control condition (WMDobject control - taking into account weighting factorstaking into account the relationship of the corresponding parameters (xi, yj,k) and index state W of the object of control. This requirement is ensured by the ratio

where (WMD- the criterion of the accuracy of the installation (for example, the maximum value average standard deviation of error for estimating a state of a control object);
(xi,yj,

Similarly, the requirements of dynamic rangesequipment 2, 3 and 5 shall comply with the requirements for dynamic rangeW control indicator of the state of the control objectW = |Wmax-Wmin|.
This requirement device is provided on the basis of weighting coefficientsthe relationship of equipment parameters 2, 3, 5 quality indicator W inspection object 1 ratio

where (WMD= |Wmax-Wmin|) - specified dynamic range control quality indicator W of control objects of the given type with diagnostic complex;
(xi= |xmax-xmin|), (y = |ymax-ymin|) - dynamic measuring ranges output of informative parameters xiforming impacts yjand accounting uncontrollable external influences yk(requirements that must be met for equipment 2, 3 and 5).

If these requirements hardware settings 2, 3 and 5, the complex will provide the necessary affectig the cost of implementation.

The technical result from the use of the invention is to increase the efficiency and reliability of control functionally complex objects, including the reduction of costs for the implementation of monitoring and reducing the duration of control in comparison with the known devices of similar purpose.

The complex can be applied in various fields of engineering, medicine and other fields of human activity.

Complex adaptation to specific applications is to formalize a description of the relationship between quality score W a specific group of control objects and the corresponding set of parameters (xi,yj,yk), which should be an evaluation of the current values of Wijkindicators of the state of the object of control, taking into account their weights
This functional relationship between the indicator of W and the corresponding parameters (xi, yj, yk)
W = f{xi,yj,yk}
may be in the form of analytical soleus to estimate the values of the corresponding weightsabout


Claims

Automated diagnostic complex comprised of a test object, the test sources impacts yjconnected the outputs to the corresponding inputs of the control object, the measures of output, inputs connected to corresponding outputs of the control object, an electronic computing machine (computer), control outputs which are connected to the inputs of the source test influences, the inputs of which are connected to the outputs of the measure of output parameters, and the output of the computer is the output of the complex, characterized in that it additionally introduced measures uncontrollable external influences ykthe outputs are connected to the corresponding additional inputs ECM inputs connected respectively to the inputs of the control object, and the composition and number of channels of the device correspond to the composition and types of the parameters of the test managed stimulating effects of yj, uncontrollable external influences inkand output of informative parameters xithis group of objects controls the metrological characteristics of the instrument channels (xi,) to the metrological characteristics of the evaluation of the quality of W this group of objects controls, taking into account the weighting coefficients of the correlation parameters (xi, yj,k) quality indicator W object control

where (WMD- the criterion of the accuracy of the device, expressed through, for example, the maximum value average standard deviation of the error of the estimate quality indicator W object control (xi) (yj) (yk) private criteria accuracy of channels xi, yj, ykdevice, expressed through, for example, the maximum value of the RMS error of the respective channels of the device,

- weighting factors that take into account the relationship of the values of the parameters (xi, yj,k) and the corresponding values of the quality measure of a state W of the test object and the dynamic ranges (xi,thej,thekmeasurements (changes) of the parameters in the channels that should the given rangeW identify quality indicators of this group of objects controls

where [(Wmax)=(WMAX-Wmin)] the dynamic range of possible changes in the values W indicator of the quality of control objects in this group, including with regard to possible faults;

the dynamic range of possible values of informative parameter xibeing measured by the apparatus of the corresponding channel control device;

[(thej)=(yj-yj)] - dynamic range of possible values of the parameters of the test influences yjsubject formation apparatus corresponding channel control device;

[(yk)=(ykmax-ykmin)] - dynamic range change settings uncontrollable external influences yksubject to consideration by the equipment of the corresponding channel control device.

 

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