SU1250847A1 - Device for measuring shifts - Google Patents

Abstract

The invention relates to a measurement technique and can be used in various fields of engineering for measuring mixes, sizes and dimensions of products. The aim of the invention is to extend the functionality by setting the origin at any point of the coordinate. Cyclic measuring signals from the primary measuring converter arrive at the switch, at the output of which, by control signals from the comparators, the address is transformed into a sawtooth voltage with a period equal to a quarter of the period of the main signal. In the electronic interpolator, the comparators operate depending on the level of the incident, its sawtooth voltage. The signals from the outputs of the comparators are converted by the shaper of the counting pulses with separate outputs into short pulses, which, having passed the logic elements, are fed to the summing or subtracting inputs (depending on the direction of movement) of the reversible reading unit. The interpolation coefficient is determined by the number of comparators and the corresponding shapers. 1 il. A (L to ate oo

Description

The invention relates to a measurement technique and can be used in various engineering fields for measuring displacements and dimensions of products.

The aim of the invention is to enhance the functionality of the device by allowing the origin to be set at any point of the coordinate.

The drawing shows a block diagram of the mouth

device (an example of a device with an interpolation coefficient of 20).

The device contains a primary displacement transducer 1, the outputs of which are connected to the information inputs of the switch 2 and through the comparators 3 and 4 addresses with the address inputs of the latter. The output of switch 2 is connected to an electronic interpolator 5 containing comparators 6–9 of various response levels, shapers 10–13 counting pulses with separate outputs, four-input elements 14 and 15 AND, two-input elements 16 and 17 OR, two-input valves 18 and 19. The output of the switch 2 is connected to the first inputs of comparators b-9, the second inputs of which are connected to the sources of the reference voltage (not shown in the drawing).

Each of the comparators 6-9 is connected to the corresponding shaper 10-13 counting pulses with separate outputs. At the same time, the same outputs of the latter are connected via elements 16 and 17 of OR and ventilators 18 and 19, respectively, to the channels of summation and subtraction of the reversible reading unit 20, as well as to four-input elements 14 and 15, whose outputs are connected together with the fifth inputs pivot elements 16 and 17 OR and the second inputs of the valves 19 and 18.

The device works as follows.

Moving the moving part of the displacement transducer 1 (for example, photoelectric) relative to the fixed part causes a change in the power field of the transducer. These changes are converted by the sensing elements of the displacement transducer into cyclic changes in voltage (current), the phases of which are in quadrature, i.e. shifted in space relative to each other by 90 °.

The cyclic measuring signals of the transducer 1 displacements arrive simultaneously at the information inputs of the switch 2 and at the inputs of the comparators 3 and 4 addresses. The control signals of the comparators 3 and 4 select the linear portions of the conversion function of the corresponding measurement signals in the switch 2. Thus, the output of the switch 2 synthesizes a new conversion function having a sawtooth shape with a period

0

s 5

0

0

the house is equal to a quarter of the period of the primary conversion function. This is the first stage of interpolation. The sawtooth measuring signal of the switch 2 is fed to four comparators 6–9 of different response levels, loaded on shapers of 10–13 counting pulses with separate outputs. Formers are sensitive to one of two logical differences.

The counting pulses thus separated are fed respectively to the logic elements 14-19, which form the summation channel (+) and subtraction channel (-) of the reversing reading unit 20. The latter can be performed, for example, in the form of a reversible pulse counter. The contents of the reverse reading device are shown on a digital display or in the form of a code in the corresponding computing device.

Four counting pulses are formed directly on the levels of Ui-U .. of the comparators 6–9 of different response levels, and the fifth is formed at the time of switching the switch, i.e. with simultaneous operation of all drivers 10-13. This pulse is selected by four-input elements 14 and 15 AND, and through elements 16 and 17 OR enters the corresponding account channel. In this case, in the counting channel of the opposite sign, through the corresponding element 16 and 17 OR, this impulse appears as a false one, which is not subject to counting. To block this pulse, the outputs of the elements 14 and 15 are also connected to the inverse (blocking) inputs of the gates 18 and 19 of the respective channels.

Implementing a different interpolation coefficient will result in a change in the number of voltage comparators in accordance with the number of selected levels Uj ,.

Claims (1)

Invention Formula A device for measuring movements, containing a primary displacement transducer, a switch connected to it by information inputs, address comparators connected between the outputs of the primary displacement transducer and address switches of the switch, an electronic interpolator connected to the switch output, a reversible readout block connected to the outputs of the electronic interpol torus, characterized in that, in order to extend the functionality by providing the possibility of setting the origin to The second point of the coordinate, the electronic interpolator contains n comparators with different response levels, the first inputs of which are combined and form the input of the electronic interpolator, n formers of counting pulses with separate outputs, each of which is connected to the corresponding comparator, two n-input elements And , the first of which is connected to the first outputs, the second to the second outputs of the counting pulse generators, two (n + 1) -input elements OR, each of counting pulses, (n + 1) th input - respectively to the output of the second and first n-input elements And, two two-input valves, the first inputs of each of which are connected respectively to the outputs of the first and second elements OR, the second - respectively the outputs of the first and second p-input elements And, the output of the first two-input valve forms the first output of the electronic interpolator, the output of which by the two inputs is connected to the corresponding 10th two-input valve - the second output but to the first and second outputs of the electronic of the interpolator. t counting pulses, (n + 1) th input - respectively to the output of the second and first n-input elements And, two two-input valves, the first inputs of each of which are connected respectively to the outputs of the first and second elements OR, the second - respectively the outputs of the first and second p-input elements And, the output of the first two-input valve forms the first output of the electronic interpolator, the output of the second Editor T. Parfenova Order 4398/34 Compiled by Yu. Petrakovsky Tehred I. VeresKorrektor I. Muska Circulation 670 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Branch PPP "Patent, Uzhgorod, st. Project, 4