SU1767325A1 - Method of rotation angle control - Google Patents

Abstract

The invention relates to a measurement technique and can be used to control goniometers in a flat angle measurement mode. The purpose of the invention is to increase the information content by simultaneously measuring both the angles of the prism and the monitoring of the measuring system of the angle of rotation. A device that implements the method includes a rotary device 1, an annular laser 2 mounted on it and a multifaceted prism 3, a photo-electric autocollimator 4, a shaper 5 selection pulses, a control and information processing unit 6, a subtraction device 7, first and second counters 8 and 9 pulses. 1 il.

Description

The invention relates to measuring technique and can be used to control the gauges in the mode of measuring flat angles.

A known method of controlling goniometers by comparison is that an exemplary multifaceted prism is installed on the goniometer, its flat angles are measured, and the measurement results are compared with the angles of the exemplary prism. .. <·, '<>

However, this method allows you to control before or after measuring the controlled parts and makes it impossible to control the goniometer in the measurement process.

The closest is a method of controlling the rotation angle, which consists in rotating the rotary device with a ring laser and a multifaceted prism mounted clockwise, registering for one full revolution the number of pulses of the photoelectric autocollimator when combining the normal to the prism face with the sight axis of the autocollimator, counting the number of signal periods for a period of time between two registered pulses of the auto-collimator, rotate the rotary device in the opposite direction The defense is re-recorded in one full revolution the number of pulses of the autocollimator and re-count the number of periods of the ring laser signal, the difference in the number of pulses of the autocollimator is calculated and this value is compared with the number of faces of the prism.

The aim of the invention is to increase the information content by simultaneously measuring both the prism angles and monitoring the measuring system of the rotation angle.

The drawing shows a diagram of a device that implements the method.

The device comprises a rotary device 1, a ring laser 2 and a multifaceted prism 3 mounted thereon, a photoelectric autocollimator 4, a selection pulse generator 5, an information processing and control unit 6, a subtraction device 7, the first and second pulse counters 8 and 9.

The method is as follows.

From the control and information processing unit 6, a signal is supplied to the drive (not indicated), which starts to rotate the rotary device 1 with a ring laser 2 and a multifaceted prism 3. After accelerating the rotary device 1 at the time when the first face of the prism 3 enters the autocollimator measurement zone 4, the driver 5 generates a selection pulse, which is fed to block 6. At the moment of combining the optical axis of the autocollimator 4 with the normal to the first face of the prism 3, an impulse is received at the output of the autocollimator 4, which is selected in block 6 from 10 to the pulse of the selection of the base face and fed to the start of the counter 8. In this case, the counter 8 begins to count the number of periods of the signal of the ring laser 3. After a complete rotation of the rotary device15 using the pulse selection of the base face, a second pulse is generated from the first face, with which the counter is closed 8. Thus, at the output of the counter 8, the number of periods 20 of the ring laser signal is obtained for a full rotation of the rotary device 1 when rotating in the clock. Then block 6 supplies a signal to reverse the drive (not indicated). After acceleration of the rotary device 1 at 25 counterclockwise rotation, as in the previous case, using the pulse of the base face selection coming from block 6, the pulse of the autocollimator 4 is emitted from the first face of the prism 3, counter 30 starts, which starts counting the number of periods signal of the ring laser 2. Then, a pulse is re-allocated from the first face, etc. After this, by the command of block 6, the subtractor 7 calculates the difference. The resulting difference is supplied to the information control and processing unit 6, in which the numbers are compared and a signal or norm or failure is issued.

Claims (1)

Claim The method of controlling the rotation angle, which consists in rotating the rotary device with a ring laser mounted on it and a multifaceted prism in a clockwise direction, register the number of pulses of the photoelectric autocollimator during one full revolution when combining the normal to the prism face with the vi50 axis of the autocollimator, calculate the number of periods of the ring laser signal for the period of time between two registered pulses of the autocollimator rotate the rotary device55 in the opposite direction Well, the number of pulses of the autocollimator is re-recorded in one full revolution and the count of the number of periods of the ring laser signal is repeated, ___ they add the difference in the number of pulses of the autocollimator and compare this difference with the number of prism faces, which differs in that! that, in order to increase information content by simultaneously measuring both the angles of the prism, 5 and monitoring the measuring system of the rotation angle, simultaneously with the calculation of the difference in the number of pulses. the autocollimator calculates the difference in the number of periods of the ring laser signal per full revolution obtained by rotating in both directions, compares the calculated difference with the number of periods of the ring laser signal, and judges by the result of the comparison the operation of the measuring system.