SU634085A1 - Arrangement for measuring spacing of two point of an object - Google Patents

Description

The invention relates to a measuring technique and can be used in instrument and mechanical engineering.

A device for measuring the distance between two points of an object is known, which contains a data carrier, a reading sensor connected in series, a read amplifier, a matching unit, a recording generator and a recording sensor, a pulse counter, a trigger unit.

A disadvantage of the device is the inability to measure the distance between the sensors, which in all cases is considered known.

The closest to the invention to the technical essence is a device for measuring the distance between two points of an object, containing a storage medium, serially connected measuring roller and a conversion unit, recording and reading sensors and a signal processing unit.

However, this device has a limited scope due to the need to record information, which entails special requirements for the media, as well as structural difficulties due to

the presence of two different write and read channels.

The aim of the invention is to simplify the design of the device.

This is achieved by the fact that the signal processing unit is made in the form of two pulse transducers, the input of the first of which is connected to the output of the conversion unit, the second to the output of the sensors, and the sensors are read.

In addition, time and pulse converters are made in the form of series-connected triggers with counting inputs, coincidence elements and pulse counters, and a generator is connected to the second inputs of the coincidence elements.

The drawing shows a block diagram of the device.

The device comprises a conversion unit 1 connected to the measuring roller 2 in frictional contact with the information carrier 3 labeled 4 and a signal processing unit 5 receiving signals from the conversion unit 1 and reading sensors 6 and 7.

Claims (2)

The signal processing unit 5 comprises two times of pulse converters 8 and 9, made in the form of serially connected flip-flops 10 and AND with counting inputs, elements 12 and 13 of coincidence, and counters 14 and 15 of pulses. Generator 16 is common to transducers 8 and 9 and is connected to the second inputs of matching elements 12 and 13. The device works as follows. The signals from the output of conversion unit 1, the sensor of which is the measuring roller 2, are fed to the counting input of trigger 10, which generates a pulse whose duration is proportional to the known distance traveled by the mark 4 for a certain period of time. The generated pulse from the output of the trigger 10 is applied to the first input of the coincidence element 12 by opening the counter 14 of the generator 16 signals arriving at the second input of the coincidence element 12 and filling the trigger-shaped pulse. In this way, the oscillation period of the generator 16 is converted into the equivalent of a distance. At the same time, the trigger 11 produces a pulse, the duration of which is proportional to the measured distance 1, by which two reading sensors 6 and 7 are spaced. The pulse is generated by electrically. Signals generated at the moments when the mark 4 on the information carrier moving in the direction of the arrow 3 reaches sensors 6 and 7 in series. The generated pulse from the output of the trigger 11 is applied to the first input of the matching element 13, opening the counter 15 of the generator 16 signals arriving at the second input of the matching element 13 and filling the pulse formed by the trigger 11. The sought distance is determined by the formula where li is the known distance that the medium passes over the time interval between two adjacent signals from the output of conversion unit 1; N - counter reading 15; , Ni is the counter reading 14. In addition to a magnetic tape, any other material with a label applied to it can be used as a carrier of information. The use of a generator of two similar triggers, coincidence circuits and counters with a certain interrelation between them and with two reading sensors, a measuring roller and a conversion unit makes it possible to widely use information carriers of a wide variety of materials in the device, as well as significantly simplify the design of the device. The invention can be used in instrument and mechanical engineering for measuring the distance along any curved surface between two points of a part or assembly. To do this, place the sensors at these points and move the data carrier along the measured contour. Claim 1. A device for measuring the distance between two points of an object, containing a recording medium with a label, a measuring roller and a conversion unit connected in series, two sensors and a signal processing unit, characterized in that, to simplify the design, the signal processing unit is designed in the form of two time pulse converters, the input of the first of which is connected to the output of the second conversion unit to the outputs of the sensors, and the sensors are made reading. 2. The device according to claim 1, characterized in that the time pulse converters are made in the form of series-connected triggers with counting inputs, matching elements and pulse counters, and a generator is connected to the second inputs of the matching elements.