SU1105755A1 - Device for measuring displacements - Google Patents

Abstract

A DEVICE FOR MEASURING DISPLACEMENTS containing a master oscillator, two frequency dividers, a phase type displacement transducer, a phase discriminator, a reversible counter, two controllable keys connected by inputs to the output of the master oscillator, outputs to the corresponding inputs of the reversible counter, the control input of the first key is connected to the first output of the phase discriminator; the first frequency divider is connected to the first output of the phase discriminator through the transducer of phase-type displacements; So that, in order to expand technological capabilities, it is provided with third and fourth keys connected by inputs to the output. master oscillator, outputs respectively to the first and second frequency dividers, the second transducer of the phase type, connected between the second frequency divider and the second input of the phase discriminator, the control input of the third controlled key is connected to the first output of the phase discriminator, and the control inputs with the second and fourth controlled keys are connected to the second input of the phase discriminator. O1 ate sd

Description

The invention relates to a measurement technique and can be used, for example, to measure and digitally indicate the movements of machine tools. A device for measuring angular displacements, containing a drum with a drive, two magnetic heads, an indicator l, is known. However, the known device does not allow to measure the algebraic sum of the displacements of two controlled objects. The closest technical solution to the invention is a device for measuring displacements, containing a master oscillator, two frequency dividers, a phase-type displacement transducer, a phase discriminator, a reversible counter, two controllable keys connected by inputs to the output of the master; outputs - to the corresponding inputs of the reversible counter, - the control input of the first key is connected to the first output of the phase discriminator, the first frequency divider is shifted through the converter to the phase type ene Rin to the first phase discriminator house 2J, disadvantage of this arrangement is the inability to measure ments with it a sum of two displacement transducers. The purpose of the invention is to expand the technological capabilities of the device, i.e. ensuring the possibility of measuring the sum or difference of the displacements of two transducers. This goal is achieved by the fact that a device for measuring displacements, containing a master oscillator, two frequency dividers, a phase type displacement transducer, a phase discriminator, a reversible counter, two controllable switches connected by inputs to the output of the master oscillator, outputs to the corresponding inputs of the reversible counter, control the first key input is connected to the first output of the phase discriminator, the first frequency divider is connected to the first output of the phases A new criminator dispenser is equipped with third and fourth keys, connected inputs to the output of the master oscillator, outputs to the first and second frequency dividers, the second transducer of the phase. type connected between the second frequency separator and the second input of the phase discriminator, respectively. The third control key input is connected to the first output of the phase discriminator, and the control inputs of the second and fourth control keys are connected to the second input of the phase discriminator. The drawing shows a block diagram of the proposed device. The device contains a pulse generator 1, controllable keys -2-5, a reversible pulse counter b, frequency dividers 7 and 8, phase-type displacement transducers 9 and 10, and a phase discriminator 11, the output of the generator 1 being connected via keys 2 and 3 to the counter inputs 6, and through switches 4 and 5 and dividers 7 and 8 with inputs of converters 9 and 10, the outputs of converters are connected to the inputs of phase discriminator 11, the outputs of which are connected to the control inputs of keys 2-5, Connected to the phase discriminator with dividers through keys 4 and 5 are d inverse converters bonds. The operation of the device is based on comparing the phase-signals of the transducers, compensating for the phase difference of these signals and counting pulses, the number of which is proportional to this phase difference. The compensation of the phase difference of the transducer signals is carried out by feedback by subtracting the pulses at the input of one of the dividers until the phases of the transducer signals coincide. The device operates as follows. In the initial state, the phase shift of the signals of the transducers 9 and 10 is absent, therefore there is no signal at the output of the phase discriminator, the keys 2 and 3 are closed, the keys 4 and 5 are open. The pulses of the generator 1 are fed through the keys 4 and 5 to the dividers 7 and 8, at the output of which the reference signals are input to the input of the converters 9 and 10. The frequency of the reference signals is less than the frequency of the generator pulses by as many times as the price of the pulse is less than the scale pitch of the converter. When moving the transducer link, the phase of its output signal shifts relative to the reference signal by an amount proportional to its displacement. of the moving link The phase difference between the signals of the converters relative to each other is proportional to the algebraic sume of the phase shifts of each signal relative to the reference, i.e. algebraic surlme of measured displacements. The transducer signals are compared with the phase discriminator 11, at the one of the outputs of which a pulse signal appears; the length of this signal is proportional to the relative phase difference of the signal from the transducers, and the sign is determined

31105755

by which of the outputs of discriminatory converters, i.e. A relative signal is output. To the high displacement of the discriminator 11 transducer output signal from. Resetting the counter reads key 2 (or 3) and closes zero, you can set the start key 4 (or 5). In this case (due to the displacement of displacements from any half of the reading of the pulses of the generator 1) from 5 to 5 transducers. The phase of the reference signal changes, the division of the inverters on, the bodies 8 (or 7) and, therefore, the sum or difference of the output signal of the transform-displacements of their moving links, the bodies 10 (or 9) relative to the signal can be measured.

the second converter, and the corresponding converter. Thus, the proposed counter input of counter 6 through the switch allows continuous (or 3) impulses to be generated, generating a dummy measurement of the sum or difference

Torah. The process lasts until the signal phases of the two transducers,

The converters' fee does not match. For example, the thickness of parts, the amount of the tool moving and

the number of pulses

compensated phase difference sig- spindle and table machine, etc.

Claims (1)

MEASUREMENT MEASUREMENT DEVICE, comprising a master oscillator, two frequency dividers, a phase type displacement transducer, a phase discriminator, a reversible counter, two controlled keys connected by inputs to the output of the master oscillator, outputs to the corresponding inputs of a reversible counter, the control input of the first key is connected to the first output of the phase discriminator, the first frequency divider through the phase displacement transducer is connected to the first output of the phase discriminator, characterized in that then, in order to expand technological capabilities, it is equipped with third and fourth keys, connected inputs to the output of the master oscillator, outputs respectively to the first and second frequency dividers, a second phase-type displacement transducer connected between the second frequency divider and the second input of the phase discriminator, the control input the third managed key is connected to the first output of the phase discriminator, and the control inputs of the second and fourth managed keys are connected to the second input of the phase discriminator. ¹ nJ G ¹ -E Z L L-E 5 NN 7 - eleven G ¹ S • SU, „. 1105755