SU694880A1 - Angle-to-code converter - Google Patents

Description

one

The invention relates to automation and computing and can be applied in cyclic converters of the angle of rotation of the shaft into a code.

A weight device is known, which contains an angle-code converter, made in the form of teeth connected to a displacement transducer of an encoding disk with teeth evenly spaced around its circumference, one of which is longer than the others, and a gear wheel with a petal of material with large magnetic resistance, mounted on the needle, and the read head mounted on the bracket can be rotated around the encoding disk, the outputs of which are connected to the registration circuit.

The closest in technical essence to the proposed angle-code converter, comprising a coding element connected to a command tab, a reading head, controlling a mobile and fixed head, connected to one input of a switching unit, pulse selectors, one of which is connected to the first input of the element OR and pulse shaper. The output of the read head through the pulse shaper is connected to the inputs of the selectors

pulse, the output of the other pulse selector is connected to the second input of the OR element, the output of which is connected to the corresponding input of the switching unit 2.

The disadvantage of these converters is the presence of a movable control head and wires connecting it with an electronic device located on the needle of the device.

scheme. This leads to an improvement in the accuracy (metrological indicators) of angle-code converters and the low reliability of their operation.

The purpose of the invention is to improve the accuracy and reliability of the converter.

This goal is achieved by the fact that the angle-code converter contains a coding element fixed to the shaft, a reading head connected through

a pulse driver with the first input of the switching unit, a fixed control head connected to the second input of the switching unit, a command tab fixed coaxially with the shaft, and

a moving control head, a disk with a command tooth, a driver for the control signal, an emitter and a receiver, mounted on the shaft, are inserted. The movable control head is located on the disk and through the driver driver

the signal is connected to the radiator, which is located on the disk coaxially with the shaft and is optically coupled to the receiver, the output of which is connected to the third input of the switching unit.

The drawing shows the functional diagram of the proposed angle-code converter.

It contains a coding element 1 with teeth 2 located around its circumference, which interact with a reading head 3 connected via a pulse shaper 4 with a switching unit 5. The coding element 1 is mounted on a common shaft 6 with a disk 7 on which a movable control head 8 is located cooperating with a command lobe 9 connected, for example, with an arrow of the measuring device with the possibility of rotation around an axis passing through the shaft.

The movable control head 8 through the driver 10 of the control signal is connected to the radiator 11 placed on the disk 7 coaxially with the shaft 6. The receiver 12 is mounted coaxially with the radiator 11 and connected to one of the inputs of the switching unit 5.

On the disk 7, a command tooth 13 is fixed, which interacts with a fixed control head 14 connected to the third input of the switching unit 5.

Converter angle-code works as follows.

Command lobe 9 is set to the conditional zero position. In the conditional zero position, the movable control head 8 intersects the command tab 9 at the moment when the command tooth 13, located on the rotating disk 7, crosses the fixed command head 14, i.e., simultaneously, the impulse to enable and disable the counting occurs. The teeth 2 fixed on the shaft 6 and the constantly rotating coding element 1 interact with the read head 3. The pulses from the read head 3 through the shaper 4 are fed to the first input of the switching unit, but there are no pulses at its output, since the permission and prohibition pulses simultaneously go.

When the command tab 9 deviates from its conditional zero position by an angular distance of 6, the moving control head 8 crosses the command tab 9 earlier than the command tooth 13 fixed control head 14. The resolution command through the driver 10 located on the rotating disk 7, enters the pair emitter 11 - receiver 12 and further to the second input of the switching unit 5, opening it.

The gap between the enable and disable command is filled with pulses from the coding element.

The number of pulses at the output of the converter, depending on the design of the coding element, depends on the angle of rotation of the shaft. When the command prong 13 intersects the fixed control head 14, a inhibit impulse arrives at the input of the switching unit 5 and closes it. Then, the next cycle of measurement of the angle of rotation of the shaft, in which all the processes are repeated, begins.

If necessary, the stationary command head can move in the plane of rotation of the disk, thereby adjusting the zero position of the command lobe.

Such a design of the angle-code converter, which provides wireless communication between the movable command head and the switching unit, significantly improves the metrological indicators of the angle-code converter, as well as increases the reliability of its operation.

Claims (2)

1. USSR author's certificate number 328774, cl. 23/36, 1970. 2. USSR author's certificate number 492901, cl. G 08C 9/04, 10/17/73 (prototype). 13