SU1427166A1 - Strain-measuring device - Google Patents

Abstract

The invention relates to a measurement technique and can be used to measure dynamic deformations. The aim of the invention is to increase speed by processing information in real time. The device has a second measurement channel, which is made in the form of serially connected low-pass filters 10, BVH 11 and BES 12. BVH 11 performs analog-code conversion under fast-changing deformation x, as well as sampling and storing the levels of the analog signal at a given time and storing it at the time of converting this level to code. BZS-12 is used both for frictioning current data on the magnitude and nature of dynamic deformation obtained in BVH 11 fr in digital form, and for transferring the results of processing this data from the output of CMV 15 to register it in the first recorder 9. The operation of the device is controlled through The control unit 16 according to the commands from the CVN 15. The algorithm for processing the measurement results of the dynamic process, as well as the selection of the measurement mode, is set by software. 3 il .. and a

Description

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The invention is based on measuring technology and can be used to measure dynamic deformations.

The purpose of the invention is to increase speed by processing information in real time.

Figure 1 presents the block diagram of the strain gauge device; Fig. 2 illustrates an exemplary embodiment of a recording and matching unit; FIG. 3 is an example of an implementation of a control unit.

The strain gauge device contains serially connected ten-bridge 1, first switch 2, amplifier 3, synchronous detector (SD) 4, integrator 5, integrator control unit 6 (CUI), address counter 7 (CA), second switch 8, and first recorder 9, series connected low-pass filter (LPF) 10,. block 11 sampling and storage (BVH), block 12. recording and matching (BZS), the output of which is connected to the second input of the second switch 8, the second recorder 13, made in the form of serially connected interface 14 and digital eight-machine (CVM) 15, block 16 of the control, the output of which is connected to the second inputs of BVH 11, BZS 12 and the third input of the second switch 8, and the source 17 of the power supply connected to the input of the strain gauge 1, the second output of the synchronous detector 4 is connected to the input of the LPF 10, the output of the integrator control unit 6 connected to the second in Odom integrator 5, the second output of the second switch 8 is connected to the input interface 14, the output of which is connected to the second input of the LES 12 and the inlet 16 BU.

BZS 12 contains serially connected address decoder 18, a switch 19 and an operative memory unit 20 (BOP), an address register 21 whose output is connected to the input of the BOP 20, and the input to the output of the switch 19, and three buffer amplifiers 22-24 control signals, which are formed in the control block 16, comprising a serially connected driver 29, a logic element AND 26, a divider block 27, a first microcontact formation circuit 28 and a control command logic circuit 29, sequentially connected a second circuit 30 Vani mikrotaktov and logic circuit 31 forming a number of samples, and

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Strain gauge device works as follows.

The voltage unbalance of the strain bridge 1 is amplified by amplifier 3, then goes to LED 4, where the selection of the useful signal from the modulated oscillations takes place. The first output of the LED 4 is used to isolate a signal of static deformation, which is fed to the input of the integrator 5, where it is digitized. The БУ11 6 generates the control signals that are fed to the input of the integrator 5. The binary-decimal codes of the static deformation measurement and the number of the measured channel are fed to the first recorder 9. A analog signal characterizing the magnitude and nature of the dynamic deformation from the second output of the LED 4 to - Steps to the input of the low-pass filter 10, from the output of which the signal is fed to the input of the BVH 11, where it stores the instantaneous value of the dynamic signal that is stored during the conversion time. The output of information from the ACS 11 to the BZS 12 is performed by the command of the HEU 16.

The capacitance BZS 12, which is 4096 hexadecimal layers, allows both sequential recording of samples of several measuring channels of the device during dynamic measurements, and recording of processing results from the digital computer 15. From the output of UZS 12, the information is received through the outputs of the second switch 8 or in the digital computer 15, or first recorder 9.

The signal from the counter 7 of the address, which through the input of the interface 14 enters the digital computer 15, generates the code of the first microcommand of the selected microprogrammer.

The control code from the output of the digital computer 15 goes to the control input of the interface 14, where, based on this code, impulses of microoperations, such as Reset to zero, Set to one, Write to the register, etc., are detected.

The interface 14, in accordance with the control code, distributes micro-operation pulses between the control inputs of the Address 7 counter and the first recorder 9 connected to its control outputs via the corresponding 31

The switch inputs 8 of the switch 8, as well as between the control inputs of the control unit 16 and the BZS 12.

Then, the interface 14 waits for the information output of the counter 7 of the address of the first registrar 9, the control unit 16, the BZS 12 to confirm the processing of the microoperations addressed to them by these blocks. Upon receipt of the ready signals from the output of the counter 7 of the address of the first recorder 9, the control unit f6 and BZS 12, interface 14 generates a response signal, which from its corresponding output enters the input of the digital computer 15.

This signal outputs the DVR 15 from the delay state, the next microcommand is sampled. Thus, the automatic synchronization of the work of the entire automatic multichannel strain gauge device is carried out on the slowest operating unit. The sequence of micro-command selection may vary depending on the state of the device blocks. If certain bits of the control code area are set in this microcommand. The interface 14 generates at the corresponding control output a pulse arriving at the control input of the corresponding block. On this impulse, the addressable unit triggers a signal condition, for example, the result of a comparison of codes, a signal of the state of some element, bit, etc.

This signal from the information output of the corresponding block is fed to the corresponding information input of interface 14, and the output ac of interface 14 to the corresponding input of the digital computer 15, which generates a transition signal. By this signal, in the digital computer 15 a pulse is generated, which selects not just another microcommand, as in the absence of a transition signal, but from a microcommand whose code number is specified in the zone of the next address of the current microcommand. The transition to the micro-command with the number specified in this micro-command is also performed if the corresponding bit is set in the transition zone of the micro-command code.

Since the information inputs and outputs of the address counter 7, the first registrar 9 of the digital computer 15, the control unit 16 and the S3C 12

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associated with the corresponding information inputs and outputs of the interface 14, depending on the value of the control code, the interface 14 connects the information input or output of the corresponding blocks specified in this code with certain information outputs or inputs of the digital computer 15, and information is transmitted in a given direction. Information from the corresponding information output of the interface 14 through the second switch 8 is fed to the input of the first registrar 9. A certain code combination of the control code is perceived in the first recorder 9 as a micro-recording of data for recording from the information output of the interface 14.

BZS 12 works as follows. The first information input of the switch 19 is connected to the output BVH 11, the second information input of the switch 19 is connected to the output of the register- torus 13.

The first and second inputs of the switch 19 also receive control signals from the output of the address decoder 18.

The control signals from the output of the address register 21 by the command coming from the output of the control unit 16 are written to the control inputs of the BOI 20. These control signals determine the addresses of the BOP 20 cells to which the dynamic deformation data from the output BVH 11 are written or the results processing of these data coming from the output of the digital computer 15 to the corresponding inputs of the interface 14. Information is recorded in the BEP 20 by signals received at the second control inputs of the BOP 20 from the outputs of the buffer amplifiers 22 and 23. These control signals determine the address of the SP 20 cells, from which information is read into the input of the second switch 8. Information is read from the BEP 20 by the BOP 20 signals fed to the second control inputs of the BOP 20 from the outputs of the buffer amplifiers 22 and 24. The address decoder 18 represents It is a logic circuit that outputs control signals on command from control unit 16. Control signals are generated using micro-tacts from control unit 16, as well as control signals sig514271

The catches coming from the corresponding outputs of the interface 1A in the dynamic mode of operation of the strain gauge device. Commands A and I control the operation of the switch 19, which determine the recording / counting mode of the information, the output of the BBX 11, or the recording / reading mode of the information from the output of interface 14 are formed in the control unit 16.1Q

BY 16 works as follows. ; With the arrival of the team from the digital computer 15 on; the command trigger trigger 32: mode selection, the signal nepe-is I of the strain gauge device stroke B is generated; dynamic mode.

The signal from the output of the trigger 32 enters the first input of the logic element AND 26, at BTOpof which input 20 receives a signal from the output of the driver 25 and enables the signal from the output of the logic element 26 to prokatkot 27 to the divider 27.

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Claims (1)

Invention Formula Strain gage device containing series-connected 666 the strain gauge bridge, the first switch, the amplifier, the synchronous detector, the integrator, the integrator control unit and the address counter, the power supply connected to the strain gauge input, the first recorder, and the output of the integrator control block are also connected to the second integrator input, which is In order to increase speed, it is equipped with a series-connected low-frequency filter, a sample and storage unit, a recording and matching unit, and a second switch, a control unit, the output of which is connected to the second input sam- ples of the sampling and storage unit, the recording and matching unit and the second switch, and the second recorder, whose input is connected to the first output of the second switch, and the output to the input of the control unit and the second input of the charging and matching unit, the output of the address counter to the third input of the second switch, the second output of which is connected to the input of the first recorder, and the second output of the synchronous detector is connected to the input of the low-frequency filter. Reset with so. I / .55X // x) registrar On the percode bcode -J omoposo but mitrator 6 From ynpaS. lush t) (iucmf a. // x) registers .2 torus f 3 3. To C. 59  VJ. four LLLJLU C. 59 VJ. four Jlu