SU1352180A1 - Two-channel follow-up displacement meter - Google Patents

Abstract

The invention relates to a measurement technique and can be used to measure displacements. The purpose of the invention is to simplify the meter due to the fact that the low-end outputs of the coarse-count reversible channel counter are connected to the high-order bits of the control inputs of the exact-counting bridge measuring circuit, which eliminates the sample matching blocks and simplifies the design of the meter. co el 00

Description

The invention relates to a measurement technique and can be used to measure displacements.

The purpose of the invention is to simplify the device by eliminating redundant blocks and introducing new links.

The drawing shows a block diagram of a two-channel tracking displacement meter.

The meter contains a generator 1, a bridge measuring circuit 2 of a coarse reference channel and a pavement measuring circuit 3 of a precision reference channel, sensors 4 and 5 connected to a bridge measuring circuit 2 and 3, a coarse counting device 6, the input of which is connected to the output the bridge measuring circuit 2, the device 7 for balancing an accurate counting channel, the input of which is connected to the output of the bridge measuring circuit 3, a reversible counter 8 of the coarse counting channel; the input of which is connected to the balancing output of the equilibration device 6, and the outputs to the control inputs of the bridge measuring circuit 2, the reversible counter 9 of the precision reference channel, the input of which is connected to the output of the bridge measuring circuit 3, the trigger 10 connected between the signal output of the device 6 balance and a blocking input of the balancing device 7, and a digital reading device 11, the inputs of which are connected to the outputs of counters 8 and 9.

The meter works as follows. First, the measuring circuit 2 of the coarse-count channel is balanced by the change in the state of the reversible counter 8 in the direction determined by the balancing device 6 based on an analysis of the characteristics of the imbalance signal. After channel 1 is balanced: the trigger condition 10 of the channel changes, which enables the balancing of the bridge measuring circuit 3 of the precision reference channel and stops balancing the bridge circuit of the coarse reference channel. The bridge metering circuit 3 of the exact counting channel is balanced by changing the state of the reversible counter 9. But by the time the bridge measuring circuit is balanced 3 of the precision counting channel, its higher bits are already near the equilibrium state to which they were reduced as the lower ones of the reverse counter 8 in the process of balancing the measuring bridge 2 of the coarse channel. After the end of the equilibration of the coarse reading in these bits, the value of the remainder R is recorded. Where R is the remainder of dividing X-th sign of the measured value in the coarse channel) (H tsg;) on XM.IK. ,., .. is the maximum value of the measured value in the accurate reading channel.

When the balancing of the measuring circuit bridge 3 of the accurate reading channel proceeds, the lower digits of the reversible counter 8 of the coarse reference channel serve as the higher digits of the counter 9 of the precise reading channel.

In the process of ypaBHoeenjHBaHHH channel

the exact counting of the higher bits of the counter 9 of the channel of the exact counting (coinciding with the younger bits of the counter of the rough counting channel) is transferred from the state corresponding to the remainder R to an equilibrium state corresponding to the actual value of the measured displacement Xj, thereby determining the difference R - XT .. If the modulus of this difference is less than Xschxhs of t.to./2, then the code of the higher bits of the coarse reference channel remains unchanged.

If the difference R - Ht. Exceeds the value of T. 2 /, then in the process of balancing the exact reading channel at the output of the higher bits of the counter 9 of the accurate reading channel, the signal

transfer or loan, arriving at the higher bits of the counter 8 of the coarse channel and changing their state by ± 1. Thereby, the coarse-count channel code is corrected.

thirty

Invention Formula

A two-channel tracking intermittent meter containing a coarse reference channel and an accurate reference channel, each consisting of a bridge measuring circuit with

- a sensor connected to it, a balancing device with balancing and signaling outputs, connected to the output of a bridge measuring circuit, and a reversible counter, whose input is connected to a balancing input 1, to its output

0 balancing devices, and the outputs to the control inputs of the bridge measuring circuit, a generator connected to the bridge measuring circuit of the channels, and a digital reading device connected to the outputs of the counters, which differ

5 by the fact that, in order to simplify the meter, the outputs of the lower bits of the reversible counter of the coarse channel are connected to the higher bits of the control inputs of the bridge measuring circuit of the exact reference channel, the transfer output of the counter

The exact counting channel is connected to the input of the coarse counting channel counter, and the meter is equipped with a trigger, the input of which is connected to the signal output of the coarse channel of the coarse ot5 account, and the output is connected to the lock input of the exact counter channel balancing device.

Editor L. Povhan Order 5269/33.

VNIIPI USSR State Committee for Inventions and Discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4

Compiled by V. Nnkpl.chsv

Tehred I. VeresKorrektor ,. Patui

Circulation 677 Subscription

Claims (1)

Claim A two-channel tracking displacement meter containing a coarse reference channel and an accurate reference channel, each consisting of a bridge measuring circuit with a sensor connected to it, a balancing device with a balancing and signaling outputs connected to the output of the bridge measuring circuit, and a reversible counter, the input of which is connected to the balancing the output of the balancing device, and the outputs to the control inputs of the bridge measuring circuit, a generator connected to the bridge measuring circuits channel ov, and a digital reading device connected to the outputs of the counters, characterized in that, in order to simplify the meter, the outputs of the least significant bits of the reversible counter of the coarse channel are connected to the higher bits of the control inputs of the bridge measuring circuit of the channel of the exact reference, the transfer output of the counter of the channel of the exact reference is connected to the input of the coarse channel counter, and the meter is equipped with a trigger, the input of which is connected to the signaling output of the coarse channel balancing device, and the output is in ode channel blocking device equilibration accurate reading.