SU429447A1 - TWO-ACCOUNT CONVERTER ANGLE TURNED TO CODE - Google Patents

Description

one

The invention relates to measurement technology and can be used in automation circuits and automatic control systems.

There are two-digit converters of the angle of rotation of the shaft into a code containing a gear rotor mounted on the shaft of the modulating motor, two gear stator with ring magnets and output coils, one of the stators mounted on the corus converter, the other on the controlled shaft.

To simplify the converter device, it is equipped with a precision-read code disk mounted on the shaft of the modulating motor, the gear rotor being made in two sections with an unequal number of teeth in the sections, and output coils are connected to the phase detector of the measuring circuit.

The drawing shows a schematic diagram of the proposed sensor.

On the measured shaft 1, a flange 2 is fastened, carrying a ring gear 3 and a disk 4 of a coarse reference code converter. The ring gear 3 has Z teeth, as well as the ring gear 5, mounted on the shaft of the modulating motor 6. The permanent ring magnet 7 together with the disks 8, 9 and the ring teeth form a magnetic core around

an annular coil 10. When the engine 6 and the ring gear 5 rotates, the magnetic flux modulates and a signal appears in the coil 10, the frequency of which f is determined by the number of teeth Z of the crowns 3 and 5 and the rotation speed of the rim 5:

.

Rotating shaft 1 with rim 3 causes a change in the phase of this signal by an amount of 2 when rotating 1 / Z of a turn.

Coil I is surrounded by a magnetic circuit consisting of a permanent magnet 12, disks 13 and 14, and a ring gear 15. On disk 14 and ring 15, the number of teeth Zj is cut, which is different from the number of teeth Z of ring 3, for example Zi Z-1. During the rotation of the engine 6 and the ring gear 15, mounted on the flange 16, a signal appears in the wheel 11, the frequency of which is fi nZi. The phase of this signal is constant and does not depend on the rotation of shaft 1.

On the flange 16, a disk 17 of a precision code converter is strengthened, which, during operation of the sensor, rotates continuously together with the modulating spinner 3 and 15.

The signals of the coils 10 and I are fed to a detector 18, at the output of which a signal with a frequency is obtained, the phase of this signal is determined by the phase of the signal f, since

the phase of the signal / i is unchanged, i.e., ultimately, the angle of rotation of shaft 1 within one step of the teeth of Vepec 3.

In the former 19, the output signal of the detector 18 is differentiated and transformed into sharp-pointed pulses delivered to the valve device 20, which opens access to information from the readers 21 and 22 of the code converters to computing devices, memory blocks, etc., depending on the structural scheme of the object. .

Photoelectric, transformer and other types of sensors can be used as code converters.

To exclude an error that arises depending on the duration of the readout, the latter must be limited by the time of rotation of the shaft of the modulating motor by the angular value of the unit of the least significant bit.

Precise reference converter for the worst case.

Subject invention

A two-axis converter of the shaft rotation angle into a code containing a gear rotor, mounted on the modulating motor shaft, two gear stator with ring magnets and output coils, one of the stators is mounted on the converter housing, and the other on the controlled shaft, characterized in that In order to simplify the converter, it is equipped with a precision reference code disk mounted on the shaft of the modulating motor, the gear rotor being made in two sections with an unequal number of teeth in the sections, and the output coils connected to the phase detector of the measuring circuit.