RU2265954C1 - Transformer of shaft rotation angle to code - Google Patents

Abstract

FIELD: computers, can be implemented in automatics and information-measurement equipment engineering.

SUBSTANCE: device has sine/cosine transformer indicators, commutator, integrators, threshold elements, element 4AND-NOT, block for launching and stopping integrators, functional transformer of relation of voltages to code, operative memorizing device, permanent memorizing device, computing device, threshold device, counter.

EFFECT: higher autonomy, control depth and trustworthiness of outputted information.

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Description

The invention relates to the field of computer technology, in particular to converters of the angle of rotation of the shaft into a code, and can be used in data processing systems.

A known converter of the angle of rotation of the shaft into a code containing a sine-cosine transformer sensor, an octant selector, summing scale amplifiers, linear multipliers, a summing block, scale devices, a comparator, a register and a control unit (see AS USSR No. 416717, cl G 08 C 9/00, 1972).

The disadvantage of the converter is its complexity, low accuracy and low reliability of the issued information.

Closest to the invention in terms of technical nature and the achieved result is a shaft rotation angle converter into a code adopted as a prototype and containing (see AS USSR No. 481929, class G 08 C 9/04, 1975) sine-cosine transformer sensors, the outputs of which are connected to the inputs of the switch, the outputs of which are connected to the inputs of integrators directly and through threshold elements tuned in pairs to positive and negative threshold voltages, connected to the inputs of the 4I-NOT element, the output of which is connected to the input of the unit and start and stop integrators, the output of which is connected to the control input of the functional converter of the voltage-to-code ratio and to the control inputs of integrators, whose outputs are connected to the inputs of the functional converter of the voltage-to-code ratio.

The disadvantage of the converter is the low reliability of the information provided, due to the inability to detect short-term failures and distortions of the converted and transmitted information from the sine-cosine transformer sensors in the operating mode.

The purpose of the invention is to increase the autonomy, depth of control and reliability of the information issued by the converter.

This goal is achieved by the fact that the shaft angle converter into a code containing sine-cosine transformer sensors, the outputs of which are connected to the inputs of the switch, the outputs of which through threshold elements configured in pairs for positive and negative threshold voltages, are connected to the inputs of the 4I-NOT element the output of which is connected to the input of the start and stop unit of integrators, the output of which is connected to the control input of the functional converter of the voltage-to-code ratio and to the control integrator moves, the outputs of which are connected to the inputs of the voltage-to-code ratio functional converter, are introduced into the memory, read-only memory, subtractor, threshold device and counter, the input of which is connected to the output of the integrator start and stop unit, and the output to the control input of the switch and read inputs of operational and read-only memory devices, the information outputs of the functional converter of the voltage-to-code ratio are connected to formation inputs of random access memory, to the first information inputs of the subtracting device and at the same time are the first output of the converter, the control output of the functional converter of the voltage-to-code ratio is connected to the control input of the threshold device and the recording input of random access memory, the outputs of which are connected to the second information inputs of the subtracting device, the outputs of which are connected to the first inputs of the threshold device, the second inputs of which are connected They are connected to the outputs of the read-only memory, and the output is the second output of the converter.

The block diagram of the Converter angle of rotation of the shaft in the code shown in the drawing.

The converter of the angle of rotation of the shaft into a code contains sine-cosine transformer sensors 1, integrators 3, a functional converter 4 of the voltage-to-code ratio, threshold elements 5 and 6, element 4I-NOT 7, the integrator start and stop unit 8, counter 9, random access memory 10, a subtractor 11, a threshold device 12, and read-only memory 13.

The outputs of the sine-cosine transformer sensors 1 are connected to the inputs of the switch 2, the outputs of the switch 2 are connected to the inputs of the integrators 3 directly and through threshold elements 5 and 6, tuned in pairs for positive and negative threshold voltages, connected to the inputs of the element 4I-NOT 7, the output of the element 4I-NOT 7 is connected to the input of the integrator start and stop unit 8, the output of the integrator start and stop unit 8 is connected to the control inputs of the integrators 3, with the control input of the functional converter 4 from voltage to the code and with the input of the counter 9, the output of the counter 9 is connected to the control input of the switch 2 and the read inputs of the random access memory 10 and the read-only memory 13, the information outputs of the functional converter 4 of the voltage-to-code ratio are connected to the information inputs of the random access memory 10, with the first information inputs of the subtractor 11 and at the same time are the first output of the converter, the control output of the functional converter 4, the voltage relationship in the code is connected to the recording input of random access memory 10 and to the control input of the threshold device, the outputs of random access memory 10 are connected to the second information inputs of the subtracting device 11, the outputs of the subtracting device 11 are connected to the first inputs of the threshold device 12, the outputs of the read-only memory 13 are connected to the second inputs of the threshold device 12, the output of the threshold device 12 is the second output of the converter.

The Converter angle of rotation of the shaft in the code works as follows.

The voltages from the outputs of the sine-cosine transformer sensors 1, proportional to sinαi and cosαi, through the switch 2, according to the address selected by the counter 9, corresponding to a certain input parameter, are sequentially connected in time to the inputs of integrators 3, which integrate the input voltages for half the period of the signal voltages, this is ensured by threshold elements 5 and 6, tuned in pairs for positive and negative threshold voltages, element 4I-NOT 7 and block 8 start and stop integral tori and thereby eliminates the error from the quadrature component and the higher harmonics that are multiples of two. The voltages from the outputs of the integrators 3, proportional to sinαi and cosαi, are applied to the inputs of the functional converter 4 of the voltage ratio into a code that converts them into the angle code Nαi.

In each conversion cycle, the angle code Nαi from the voltage ratio to functional code converter 4 to the code corresponding to a certain parameter Xi, by the signal, the conversion end (CP) is recorded in the ith cell of random access memory 10. Random access memory 10 is designed to store angle code information ( Nαi-Nαm) of each of the parameters during one polling cycle, and read-only memory 13 for storing threshold values corresponding to the speed and range of variation of each called parameters.

Thus, according to the signal of the counter 9, corresponding to a certain input parameter, at the output of the random access memory 10, there will be code information Nαi read in the previous polling cycle of one of the input parameters, and the threshold value corresponding to the ith parameter.

Therefore, in each conversion cycle, at the first and second inputs of the subtracting device 11, code information corresponding to one of the parameters in the current (tj) and in the previous (tj-1) conversion cycles will be present. The subtracting device 11 generates a difference value of these quantities, i.e.:

The value of the difference ΔNαi from the output of the subtracting device 11 is fed to the first input of the threshold device 12, the second input of which receives the threshold value Pi from the read-only memory 13, which is selected based on the maximum possible (permissible) speed and range of variation of the ith parameter. The threshold device 12 compares these values in absolute terms. If, as a result of the comparison, the absolute value:

the threshold device 12 generates a potential corresponding to the level of "log.0", which indicates the correctness of the processed information in the polled conversion cycle and corresponds to the correct operation of the converter, and if, as a result of the comparison, the absolute value:

threshold device 12 generates a potential corresponding to the level of "log. 1", which indicates a failure or distortion of the processed information in the polled conversion cycle and indicates a malfunctioning converter.

Thus, the introduction of an angle of rotation of the shaft into the code of the random access memory, read-only memory, subtractor, threshold device and counter allows you to receive information about both short-term failures and its distortions caused by destabilizing factors (power interruptions, surges and pulsations supply voltages, etc.), and thereby increase the autonomy, depth of control and reliability of the information issued by the converter.

Claims (1)

A converter of the angle of rotation of the shaft into a code containing sine-cosine transformer sensors, the outputs of which are connected to the inputs of the switch, the outputs of which are connected to the inputs of the integrators directly and through threshold elements tuned in pairs to positive and negative threshold voltages, connected to the inputs of the 4I-NOT element, the output of which is connected to the input of the integrator start and stop unit, the output of which is connected to the control input of the functional converter of the voltage-to-code ratio and to the control inputs of integrators, the outputs of which are connected to the inputs of the functional converter of the voltage-to-voltage ratio into a code, characterized in that random access memory, read-only memory, a subtracting device, a threshold device and a counter are input into it, the input of which is connected to the output of the integrator start and stop unit, and the output is to the control input of the switch and read inputs of operational and read-only memory devices, information outputs of the functional converter carrying voltage in the code is connected to the information inputs of random access memory, to the first information inputs of the subtracting device and at the same time is the first output of the converter, the control output of the functional converter of the voltage-to-code ratio is connected to the control input of the threshold device and the recording input of random access memory, the outputs of which are connected to the second information inputs of the subtractor, the outputs of which are connected to the first inputs of the threshold device three, the second inputs of which are connected to the outputs of a read-only memory device, and the output is the second output of the converter.