SU1663429A1 - Linear dimension measuring device - Google Patents

Abstract

This invention relates to instrumentation technology. The purpose of the invention is to improve accuracy by eliminating the de-centering of the image relative to the center of the measuring line. The device consists of photodetectors, elements And, electrically connected with photoreceivers, connected in series by a generator and a counter. According to the signals from the generator and the counter, a group-wide reading of the photodetectors occurs. When the read group corresponds to the size of the item being monitored, a logical unit signal appears at the output of one of the group elements. 1 n. F-ly. 1 il.

Description

The invention relates to an instrumentation technique and can be used to measure linear dimensions.

The purpose of the invention is to improve the accuracy by eliminating the effect of image de-centering relative to the center of the measuring line.

The drawing shows the block diagram of the device.

The device consists of an optically coupled imaging system of a controlled product (not shown) and a ruler consisting of two symmetric groups 1 and 2, each of which consists of 3.1 photodetectors ... Z.p / 2 and 4, n2 And 5 elements, sequentially connected generator 6, coincidence circuit 7, (2n-1) -discharge counter 8 and (2n-1) - input key element 9, connected in series n2-input element OR 10, trigger 11 and delay line 12 , the trigger output 11 is connected to the second input of the circuit 7 of the match and the lockable key Vågå element 8 and

counter 13 pulses, the counting input of which is connected to the output of the circuit 7 coincidence, and the reset input to the output of the delay line 12

Elements And 5 are combined in 2p-1 groups, the third inputs of elements And 5 in each group are combined and connected to the corresponding outputs of key element 9, each k-group of elements 5 from the first to the n-th contains k elements 5, each k-group elements from (pm) th to (2p-1) - contains (2n-k) elements 5, the first two inputs of the 1st element 5 from each k-th group with n are connected to the output (n-i + 1 ) -ro of the photodetector 3 and to the output of the 1st photodetector 4, respectively, the first two inputs of the 1st element of the 5th k group at 2n-1 are connected to the output of the i-ro photodetector 3 and to the output (nl) -ro photodetectors ik 4.

The device works as follows.

The image of the monitored product is formed on the photodetectors 3 and 4. According to the signals of the generator 6 and the counter 8 pro (L

WITH

with

4 KD

pgroup readout of the states; i.e. photodetectors 3 and 4, with the groups of photodetectors corresponding to groups of elements And 5, each group of photodetectors corresponding to a certain size of the product under test. When the size of the readable group corresponds to the output of the element OR 10, a signal of a logical unit appears, which sets the trigger 11 to the zero state, while reading 9 is blocked by element 9, and pulses from the generator 6 through the circuit 7 cease to arrive at the input of the counter 13. The signal from trigger 11, delayed by line 12, sets trigger 11 to one state, which allows repeating the cycle of group reading of photodetectors 3 and 4, while counters 8 and 13 are preset to the initial state.

Claims (1)

Claims An apparatus for measuring a linear dimension comprising an optically coupled imaging system of a test article and a ruler consisting of two symmetric groups of n photodetectors each, n elements AND, two inputs of each AND element connected to two corresponding symmetric photo receivers belonging to different groups, characterized in that, in order to increase accuracy, it is equipped with additional elements AND, connected in series by a generator, a coincidence circuit, 2n-1-ra an incremental counter and a 2p-1-input key element connected in series p-input element OR, trigger and delay line, trigger output connected to the second input .circuit diagram and blocking input of the key element, and a pulse counter, the counting input of which is connected to the output of the coincidence circuit, and the reset input connected to the output of the delay line, reset input (2n-1) -th bit counter is connected to the output of the delay line, all elements And completed three-input and combined into 2n-1 groups, the third inputs of the elements And in each group are combined and connected to the corresponding outputs of the key element, each k-group from first to The n-th contains k elements AND, each k-group from (n + 1) -th to (2n-1} -th contains 2n-k elements And, the first two inputs of the 1st element And from each k-th group with n are connected to the output (n-1 + 1) of the first photodetector of the first group and to the output of the i-ro photodetector of the second group, respectively, the first two inputs of the 1st element And from each k-th group at 2n-1 are connected to the output of the 1st the photodetector of the first group and to the output of the (n-l) -ro photoreceiver of the second group.