SU1523910A1 - Device for measuring kinematic error of gear transmissions - Google Patents

Abstract

This invention relates to a measurement technique. The device contains photoelectric converters 1 and 2 of the initial and final transmission links, each with a source of 3 and 4 radiation and a photodetector 5 and 6, a variable frequency generator 7, an amplifier 8, a first detector 9 connected to the photo receiver 6 of the final transmission link 2, and a recorder 10. The device is equipped with a second detector 11, a frequency multiplier 12, a comparison circuit 13 and an adder 14. The invention improves the measurement accuracy by eliminating errors due to the instability of the rotational speed of the control mechanism, and also because of the non-identity of the manufacture of raster grids. 1 il.

Description

one

(21) 4365437 / 25-28

(22) 01/18/88

(46) 11/23/89. Bul No. 43

(71) All-Union Correspondence Mechanical Engineering Institute

(72) V.K.Garipov, A.V.Seleznev,

I.A.Shvab, I.I. Shvab and T.V.Makharashvili (53) 531.717.2.621.833 (088.8)

(56) USSR Copyright Certificate No. 574603, cl. G 01 B 11/24, 1976.

(54) DEVICE OF DGM MEASUREMENT OF KINEMATIC HEATING OF THE TEETHES OF TRANSMISSIONS

(57) The invention relates to a measurement technique. The device contains photoelectric converters 1 and

2 initial and final transmission links, each with a source of 3 and 4 radiation and a photodetector 5 and 6, a generator 7 of adjustable frequency amplifier 8, a first detector 9 connected to a receiver 6 of the converter 2 of the final transmission link, and a recorder .10. The device is equipped with a second detector 11, a frequency multiplier 12, a comparison circuit 13 and an adder 14. The invention improves the measurement accuracy by eliminating errors due to the instability of the rotation speed of the monitored mechanism, as well as due to the non-identity of the fabrication of raster grids. 1 il.

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The invention relates to a measurement technique, namely, devices for controlling the kinematic error of mechanisms and gear transmissions.

The aim of the invention is to improve the measurement accuracy, which is achieved through the use of photoelectric converters of the initial and final links of the transmission.

The drawing shows a diagram of a device for measuring the kinematic error of gears.

The device contains photoelectric converters of initial 1 and final 2 transmission links, each with a source of 3 and 4 radiation and a photodetector 5 and 6, respectively, a variable frequency generator 7, amplifier 8, the first detector 9 connected to the photodetector 6 of the final link converter 2 transmitters, and the recorder 10. The device is equipped with a second detector 11, a frequency multiplier 12, a comparison circuit 13 and an adder 14. One output of the frequency generator 7 is connected to the source 3 of the transmitter — not the initial link converter, and the other with the first input of the comparison circuit 13, the second input of which is connected to the first output of the amplifier 8. Output. A comparison circuit through the second detector 11 is connected to the first input of the adder 14, the second input of which is connected to the output of the first detector 9, and the output to the recorder 10. The radiation source 4 of the converter 2 of the final link is connected via frequency multiplier 12 to the second input of amplifier 8, the input of which is connected to the output of the photodetector 5 of the converter 1 of the initial transmission link.

The device works as follows.

The light pulses emitted by the radiation source 3 are directed by the optical system 15 to the measuring junction of the raster grids 16 and 17 of the photoelectric converter 1. Since the frequency of the light pulses is equal to the frequency of overlap of the strokes of the raster grids 16 and 17, they pass the gratings and arrive at the photodetector 5 The variable input signal of the photodetector 5 is amplified by the amplifier 8 and fed to a frequency multiplier 12, where the frequency of the incoming signal is multiplied by the gear ratio of mechanism 18, and by one

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their inputs are 13 comparison circuits. The output signal from the frequency multiplier 12 is fed to the radiation source 4 of the photoelectric converter 2, and its light pulses are directed by the optical system 19 to the photodetector 6. Since the sector grating 21 is shifted relative to the same grating 17 by half their angular pitch, in the absence of kinematic error light pulses do not arrive at the photodetector 6. When a kinematic error is received, the angular displacement of the raster grid 20 relative to the grid 16 and the light pulses of the radiation source 4 comes. The photodetector 6 is transmitted to the photodetector 6. Next, the signal of the photodetector 6 is supplied to the detector 9, in which a signal proportional to the angular displacement of the disk gratings 16 and 21, i.e. kinematic error .. The input signal of the detector 9 is fed to the second input of the adder 14.

At a constant rotational speed of the initial link of the monitored mechanism, the first input of the adder 14 does not receive a signal from the comparison circuit 13, since it compares the signals of the same frequency supplied by the generator 7 and the amplifier 8. Therefore, the output signal of the detector 9 through the adder 14 without the change is fed to the recorder 10. If, however, a change in the rotational speed of the initial transmission link occurs, then a signal proportional to this change appears at the output of the comparison circuit 13. This signal, after passing the detector 11, is fed to the first input of the adder 14. At the same time, a signal appears at the output of the detector 9, which is proportional to both the change in the rotational speed and the kinematic error. The signals from detectors 9 and 11 are subtracted in adder 14, and at its output a signal proportional to only the kinematic error appears. The magnitude of this signal does not depend on the speed of rotation of the initial transmission link. Similarly, the errors are compensated for by changing the amplitude of the light pulses emitted by sources 3 and 4 of the radiation.

The use of the proposed device allows to increase the accuracy for

by eliminating errors due to the instability of the rotation speed of the monitored mechanism, as well as due to the non-identity of the manufacture of raster grids.

Claims (1)

Invention Formula A device for measuring the kinematic error of gears, containing 1e photoelectric converters of the initial and final transmission links, each with a radiation source and a photo-receiver, a generator tector, frequency multiplier, comparison circuit and adder, one output of the frequency generator is connected to the radiation source of the initial level converter, and the other to the first input of the comparison circuit, the second input of which is connected to the first output of the amplifier, the output of the comparison circuit is connected via the second detector with the first input of the adder, the second input of which is connected to the output of the first detector, and the output - with the recorder, the source of radiation. The converter of the adjustable frequency, the amplifier, the first detector connected to the photoreceiver through a multiplier, often by ANY converter of the final link, is connected to the second output of the gain, and the recorder, which is connected to the output, so that, with the aim of Photodetector converter NIN accuracy, it is equipped with the second de-initial link transmission. tector, frequency multiplier, comparison circuit and adder, one you. the course of the frequency generator is connected to the radiation source of the converter of the initial link, and the other to the first input of the comparison circuit, the second input of which is connected to the first output of the amplifier, the output of the comparison circuit through the second detector is connected to the first input of the adder, the second input of which is connected to the output of the first detector, and the output is with the recorder, the radiation source of the transducer of the final link is connected to the second output of the amplifiers through the multiplier, the input of which is connected to the output of the photodetector of the converter nogo transmission link.