SU623223A1 - Shaft angular position- to-code converter - Google Patents

Description

3

are connected to the additional driver of the code generator 7, the output of which is connected to another input of the computing unit b.

The Converter operates as follows.

When adjusting the converter, the shaft 3 is set to the conditionally zero position, the movable stator of the angle sensor 2 is set by the control unit 4 to the conditionally zero position, and the initial value of the codes in the driver 5 and 7 are set to zero.

Thereafter, the shaft 3 is rotated. Angle codes from the formers 5 and 7 are fed to the computing unit 6, which 1y calculates the function of the difference of the codes and fixes it in the operational memory. After rotation through 360 °, shaft 3 is again set to zero, the T10 movable stator of angle sensor 2 is shifted | to some yro.i O, measured, for example, by the imaging device 7, and fixed in this position. At the output of the driver 7, a zero code is again set. Then, the shaft 3 is again rotated, and the second function of the code difference is located in the RAM of the computational 10 of block 6 (|).

After that, calculating block 6, using two known functions of the code difference, calculates the static tolerance functions of both sensors 1 and 2 to condition the stator zero position of angle sensor 2 and sends the calculated functions to the non-volatile memory, and calculate the operational memory the device is free.

Representation of the functions of the frontier in the block of long-term w ites could be 11), for example, in the form of coefficients of the Fourier series. Thereafter, the stator of the angle sensor 2 returns to the initial iiy..ieBoe position and is fixed. At this stage, the adjustment of the converter is completed,

At the request of the subscriber during operation, the formers 5 and 7 provide angle codes. The calculating device, referring to the memory, extracts the coefficients of the error functions and calculates the corrections from the value of 10 × 10 or the given angle codes, which then deducts from the values. codes, compares the results and gives the final result to the subscriber.

The calculated result codes for drivers 5 and 7 must be equal. Their difference indicates a change in the error characteristics of one of the sensors 1 and 2 or shapers 5 and 7. This is a signal of a possible decrease in the reliability of measurements, which is output to the control system by the computing unit 6.

During the nanoprophylaxis of the system. We shaft 3 rotates slowly through 360 °, and a specified method is monitored on a large number of evenly spaced points of a circle.

-one

NW.WORKING ORDER: This is an example. In order to determine the reliability of the obtained static error functions in the process of adjusting the curvature, additional stator turns of sensor 2 at angles of Oz, Oz, etc. are possible. In this case, the stability of the error values is determined and the functions themselves are refined.

In another representation of functions, for example, in the form of fuics with quantization of the angle, and the value of the angle codes obtained in the formers 5 and 7, from a long time interval of the computational unit 6 izv; , and computational unit 6 (), predicted: 1, et corrections by the method of interior.

Other variants of algorithms are possible.

In the converter there can be not two structurally disconnected sensors, but a dual sensor with two stators, one of which is movable. The rotor can be integrated with both stators, if it allows the sensor to be effective.

Thus, this angle to code converter makes it possible to determine the error, compensate it during operation, and generate a signal that the measurements are less reliable.

The economic effect of the use of the proposed converter is determined by its technical advantages.

Claims (2)

1. A.Ahmetzhanov. A. High-precision systems, | angle transmissions of automatic devices, M., “Energie, 1975, p. 262, fig. 13-2. 2. USSR author's certificate L 409268, G 08 C 9/04.