RU1796882C - Digital transducer of linear displacements - Google Patents

Digital transducer of linear displacements

Info

Publication number
RU1796882C
RU1796882C SU914937403A SU4937403A RU1796882C RU 1796882 C RU1796882 C RU 1796882C SU 914937403 A SU914937403 A SU 914937403A SU 4937403 A SU4937403 A SU 4937403A RU 1796882 C RU1796882 C RU 1796882C
Authority
RU
Russia
Prior art keywords
output
input
displacement
measuring
switch
Prior art date
Application number
SU914937403A
Other languages
Russian (ru)
Inventor
Геннадий Филиппович Астанин
Николай Андреевич Брио
Андрей Владимирович Ломакин
Виктор Александрович Зайчиков
Виктор Николаевич Плахов
Original Assignee
Московское научно-производственное объединение "Измеритель"
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Московское научно-производственное объединение "Измеритель" filed Critical Московское научно-производственное объединение "Измеритель"
Priority to SU914937403A priority Critical patent/RU1796882C/en
Application granted granted Critical
Publication of RU1796882C publication Critical patent/RU1796882C/en

Links

Abstract

The invention relates to a control and measuring technique, in particular, to measuring non-electric quantities by electric methods, and can be used in various devices for measuring the magnitude of displacement. The aim of the invention is to improve the accuracy and stability of measurements. This goal is achieved by the fact that in the device for measuring the amount of displacement 2, comprising a generator, three frequency dividers, an inductive sensor, an amplitude discriminator and a digital indicator, an additional directional displacement switch is connected, connected to the first input and output of the third frequency divider, the second to the output of the amplitude discriminator, the outputs through the switch in two directions, with the first input of the key, the second input of which is connected to the output of the second frequency divider, and the output is summed with the inputs of the counter and the stepper motor control unit, the input of the amplitude discriminator is connected to the output of the inductive displacement sensor, the input of which is connected to the output of the first frequency divider, the input of which is connected to the output of the generator. 2 ill. (L

Description

The invention relates to measuring technique, in particular to measuring linear displacements, and can be used in any industry.
Inductive displacement meters are known, comprising a self-oscillator, two measuring circuits consisting of inductive sensors and capacitors, and a sensor signal amplitude meter connected to the junction boxes. active sensors with capacitors.
The disadvantages of these devices are the presence of a pointer amplitude meter, which introduces additional error and instability of the output signal in the presence of destabilizing factors, for example, supply voltage.
The closest technical solution to the invention is a digital, linear displacement converter / comprising a generator, three frequency dividers, a two-way switch, an inductive sensor and a series-connected comparison unit, a reversible counter and a digital indicator.
The disadvantage of this device is its low stability and accuracy of measurements, caused by the influence of destabilizing factors - temperature and time.
The purpose of the invention is to improve the accuracy and stability of measurements.
The goal is achieved in that it is equipped with a directional adjuster, an inverter, a key, a control unit for a stepper motor and a stepper
Vj h o
00
00
Yu
by the motor, the first input behind the displacement direction sensor is connected to the output of the third frequency divider, and the second input to the output of the comparison unit, made in the form of an amplitude discriminator, the generator output is connected to the inputs of the first divider and inverter, the output of the first divider is connected to the input of the second divider and inductive sensor , the inverter output is connected to the input of the third divider, the output of which is connected to the first input of the motion direction adjuster, the second input of which is connected to the output of the amplitude discriminator a, the first output of the motion direction sensor is connected to the first inputs of the engine control unit and the switch, the second output of the motion direction sensor is connected to the second inputs of the switch and the engine control unit, the output of the second divider is connected to the first input of the key, the second input of which is connected to the output of the switch and the key output is connected to the input of the totalizing counter and the third input of the engine control unit.
In FIG. 1 is a block diagram of a digital linear displacement transducer; in FIG. 2 - its electrical circuit diagram,
The digital linear displacement transducer contains a master oscillator T, frequency dividers 2, 5, 6, an inverting element 3, an inductive sensor 4, an amplitude discriminator 7, a sensor for the direction of the measured displacement 8, a switch for the direction of displacement, a key 9, a control system for the stepper motor 10, summing up counter 11, stepper motor 12 and digital indicator 13.
Digital Converter linear displacements works as follows. ;. ,; . .. -
The pulses from the master oscillator 1 are fed to the input of the frequency divider 2, from the output of which is fed through the power amplifier and the transformer of the inductive sensor 4 to the measuring circuits of the latter, and also through the inverter 3 to the counter 6, which serves as a generator of synchronizing pulses, and the division factors of the counters 2 and 6 are equal. From the output of the generator of synchronizing pulses, the signal is fed to the first input of the directional adjuster, the second input of which receives pulses from the amplitude discriminator 7, which converts the signal taken from the measuring circuits of the inductive sensor into pulse-width modulated pulses. Over-directional sensor gives
enable or disable signal to the first input of the key 9, the second input of which receives pulses from the frequency divider 5. When the enable signal at the first
5 key input pulses from the second input through. As a result, the key output is fed to a summing counter and a stepper motor control system. Having worked out the incoming pulses, the stepper motor moves the core 0 of the inductive sensor to the neutral position, upon reaching which a signal appears at the other input of the trigger of the motion encoder. The trigger will tip over and give a inhibit signal to
5 key 9.
The value of the measured movement and the number of pulses recorded in the totalizing counter and fed to a digital indicator are determined from the ratio
0
D |
S n
5
where Al is the measured displacement, m;
S is the thread pitch of the shaft of the stepper motor, mm;
5 N is the number of pulses recorded in the totalizing counter;
p is the number of pulses of the stepper motor per revolution,
Formula invented neither
0 A digital linear displacement transducer comprising a generator, three frequency dividers, a two-way switch, an inductive sensor, and a comparison unit in series,
5 a reversible counter and a digital indicator, characterized in that, in order to increase the stability and accuracy of measurement, it is equipped with a directional adjuster, an inverter, a key, a unit
0 control the stepper motor and the stepper motor, the first input of the master of the direction of movement is connected to the output of the third frequency divider, and the second input to the output of the comparison unit, made in
5 As an amplitude discriminator, the output of the generator is connected to the inputs of the first divider and inverter, the output of the first divider is connected to the input of the second divider and an inductive sensor, the output of the inverter is connected to the input of the third divider, the output of which is connected to the first input of the motion direction adjuster, the second input of which is connected with the output of the amplitude discriminator, the first output of the pickup
the direction of movement is connected to the first inputs of the engine control units and the switch, the second output of the drive directional switch is connected to the second inputs of the switch and the engine control unit, the output of the second divider is connected to the first input of the key, the second input counter and the third input of the unit connected to the output switch, engine control, and the output of the key is connected to the input
SU914937403A 1991-03-29 1991-03-29 Digital transducer of linear displacements RU1796882C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU914937403A RU1796882C (en) 1991-03-29 1991-03-29 Digital transducer of linear displacements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU914937403A RU1796882C (en) 1991-03-29 1991-03-29 Digital transducer of linear displacements

Publications (1)

Publication Number Publication Date
RU1796882C true RU1796882C (en) 1993-02-23

Family

ID=21575139

Family Applications (1)

Application Number Title Priority Date Filing Date
SU914937403A RU1796882C (en) 1991-03-29 1991-03-29 Digital transducer of linear displacements

Country Status (1)

Country Link
RU (1) RU1796882C (en)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Авторское свидетельство СССР N 721754; кл. G 01 В 7/00, 1980. *

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