Method for connecting semi-bridge indicator to personal computer

FIELD: measurement-information equipment engineering, in particular, aspect of implementing semi-bridge indicators together with personal computer.

SUBSTANCE: semi-bridge indicator is connected to computer through sound card, central processor unit of which is used for forming bearing alternating voltage, and two stereo output channels form alternating current bridge together with semi-bridge indicator, from diagonal line of which signal is injected into central processor unit of sound card.

EFFECT: simplified connection of semi-bridge indicator to computer, lower mass of device, possible connection to portable computers, decreased power consumption.

11 cl, 6 dwg

 

The technical field to which the invention relates.

The invention relates to measurement and information technology, in particular to the field of measuring and recording electrical signals from sensors connected to the half-bridge circuit, and can be used in the development, production, implementation and operation of inductive, capacitive, strain gauge, photo, thermistor and the resistance half-bridge sensors together with computer technology.

The level of technology

Analogue of the invention is a method of connecting an inductive half-bridge sensors to the computer via the ADC as a stand-alone measuring unit plant Esmeron (product Catalog plant Esmeron", St. Petersburg, http://www.izmeron.inc.ru.) The reference voltage on the diagonal of the bridge is created by the generator is also installed in the measuring unit. With essential features of the invention matches the following characteristics are similar: "connecting the inductive sensor to the computer produce ADC".

The disadvantages are the counterpart:

A. Large dimensions and weight of the external transducer ADC, required to connect the sensor to the computer.

B. the Need to ensure the Converter's power.

C. Complexity of connecting to a computer without a serial port.

The prototype of the invention is SPO is about half-bridge connection of inductive transducers (converters) to the computer via the ADC charge ACPCI 3701 company ADDI-DATA (Germany) (Catalogue company ADDI-DATA http://www.addi-data.de and catalog company PROSOFT (Moscow), http://www.prosoft.ru.

With essential features of the invention match the following set of features of the prototype: "connecting half-bridge inductive sensors to the computer is via ADC card installed in the computer."

The disadvantages of the prototype are:

A. the Need to connect the sensors to the PC card via the auxiliary matching block.

B. the Complexity of connecting the sensor to computers that do not have PCI slots, such as portable computers.

Century high current consumption of the card.

The elimination of defects can be achieved by connecting half-bridge sensors to the computer via the sound card of the computer, the entrance of which is used as the ADC, and the output as DAC.

The invention

The problem to which the invention is directed, is a simplified inductive transducer moves to the computer.

During implementation of the invention can be obtained from the following technical results:

A. the weight of the device due to the absence of the intermediate block.

B. reducing the power consumption of the device.

C. Connect portable computers that do not have PCI and ISA slots.

These technical results are achieved due to the fact that Conn is the use of sensors to the computer is via ADC charge, which sound card is used, the output of which is used as a DAC, and the entrance - as ADC.

Features, distinctive from the closest analogue, expressed by the following set of features: "the way of the half-bridge connection of the sensor to a personal computer, in which the analog stereo output of the sound card connects to the sensor as a half-bridge with simultaneous formation thereon of the reference alternating voltage and the analog input of the sound card is used to input the signal from the diagonal of the bridge formed between the system ground and the midpoint of the half-bridge sensor".

To reduce the mass of devices you may connect to an embedded on the motherboard of a personal computer sound card.

To connect portable computers, the connection may be performed in such a way that you are using an external sound card.

With the aim of increasing the number of sensors connected, the connection may be performed in such a way that optionally use an external sound card or sound card installed on your computer. Thus, the objective of the invention is resolved.

Figures 1-6 show the schematic of the half-bridge connection of the sensor to the computer's sound card.

Figure 1 shows the connection diagram of half-bridge inductive sensor figure 2 - connection diagram of half-bridge inductive sensor with additional input reference voltage to the second input of the sound card; figure 3 - connection diagram of the capacitive half-bridge; figure 4 is a wiring diagram of half-bridge from testspritescene (load cell) and the resistance half-bridge.

As a half-bridge sensors connected to the declared scheme can be used, in particular, inductive displacement sensors, capacitive displacement sensors, rheostat displacement sensors, strain sensors, thermistor sensors and photoresistor sensors. As the sensor can also be used chetvertinskoy sensor - half-bridge sensor, which second quarter of the bridge forms a fixed resistor.

The scheme works as follows. On two-channel (stereo) output DAC sound card (out1 and out2) formed the reference AC voltage. The two channels form a sensor AC bridge, with the diagonal of which a signal is being input to one of the input gears.

To improve the accuracy of signal processing on the second stereo input gear can live with one of the output gears, as shown in figure 2-6.

The possibility of carrying out the invention with the implementation of this assignment is confirmed by the known means and methods of connecting devices. Thus, confirmed may the forth embodiment of the invention.

The invention will be obtained the following technical results:

A. simplification of the wiring for the sensor.

B. the Ability to connect portable computers.

C. the weight of the device.

1. The method of half-bridge connection of the sensor to the computer, which consists in the connection of the sensor in a bridge circuit via the ADC device, characterized in that the sensor is connected to the computer via the sound card, DAC which is used to form the alternating voltage, and two channel stereo outputs form with half-bridge sensor AC bridge, with the diagonal of which a signal is being input to the ADC of sound card.

2. The method of connecting the sensor to the computer according to claim 1, characterized in that as an ADC you are using an external sound card.

3. The method of connecting the sensor to the computer according to claim 1, characterized in that you are using the sound card built into the motherboard of the computer.

4. The method of connecting the sensor to the computer according to claim 1, characterized in that the signal from the diagonal of the bridge is fed to the input of another sound card.

5. The method of connecting the sensor to the computer according to claim 1, characterized in that the sensor is an inductive sensor movements.

6. The method of connecting the sensor to the computer according to claim 1, characterized in that as of the date the ICA uses capacitive displacement sensors.

7. The method of connecting the sensor to the computer according to claim 1, characterized in that the sensor uses a rheostat sensor movements.

8. The method of connecting the sensor to the computer according to claim 1, characterized in that the sensor is a strain sensor.

9. The method of connecting the sensor to the computer according to claim 1, characterized in that the sensor uses a thermistor sensor.

10. The method of connecting the sensor to the computer according to claim 1, characterized in that as the sensor is used photoresistor sensor.

11. The method of connecting the sensor to the computer according to claim 1, characterized in that as the sensor is used chetvertinskoy sensor, and another quarter of the bridge forms a fixed resistor.



 

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