SU760162A1 - Device for checking shaft angular position-to-code converters - Google Patents

Description

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The proposed device relates to the field of automation and computing, and is intended to automatically determine the error of converters angle-code.

Known devices for controlling the accuracy parameters of converters.

Known devices for checking angle-code converters allow determining the number of an erroneous code boundary (measured from the reference code) and fixing the error value using the COMPLEX algorithm based on comparing the current value of the converter code with the theoretical value of the coordinate code of the allowable area Functional diagrams of known devices (1) (2} include a converter, a distributor, a switch, a motor with a synchronization circuit, a code converter, a register of reference combinations, two schemes of eniya two trigger switch BAN element control circuit transitions of first and second controlled ruyuschego bits, two gates, a counter and register the coordinates of the permissible zone.

It is also known a device for monitoring

angle-code converters allowing

2

determine the magnitude of the error transducer, using the most simple algorithm based on a comparison of the phase reference signal and the actual code shift during the rotation of the shaft ₅ Vatel transformation with constant velocity. In this case, the measured phase shift is converted to the corresponding time interval, which is filled with stable frequency pulses.

, 0 This device for controlling angle-code converters (3) is the closest in technical essence to the proposed one and contains a reference frequency generator, the output of which is connected to the first input of the shaper of the reference code change signals and to the input of the stable speed drive, kinematically connected with the controlled converter whose output is connected to the input of a real code change driver, the first output of which is connected to the second driver input of a reference code change signal, the output of the driver th through slots generator coupled to the processing unit.

760162

However, the known device is characterized by a reduced reliability of operation, which is caused by a malfunction in the operation of the device in case of exceeding the accuracy of € (a) of the converter

Quantum Q controlled discharge. This is explained by the principle of constructing a functional circuit of the device, which is based on the formation of the time interval between the signals of the reference and the actual code change, endowed with any distinctive features. Therefore, if the inequality δ (α)> Ц is fulfilled, the time interval will be formed between the code change signals of the same name (for example, between reference signals), which will lead to incorrect device operation and a fundamental error in determining the accuracy parameters of the controlled converter.

The aim of the invention is to improve the reliability of the device, which allows the control of converters angle-code in a wide range of measurement errors & (a).

This goal is achieved by the fact that a logic block consisting of frequency dividers, a trigger, AND, OR, AND —NE elements and a delay element is entered into the angle-code converter control device. The output of the shaper of the reference code change signals and the second output of the shaper of the real code change signals are connected to the first inputs of the first and second frequency dividers, respectively, the output of the first frequency divider to the first inputs of the first OR element, the trigger and the first AND –NE element. The output of the second frequency divider is connected to the second inputs of the first element OR and the trigger and the first input of the second element AND — NOT; the outputs of the trigger are connected to the second inputs of the corresponding elements AND — NOT, the outputs of which are connected to the first and second inputs of the AND element and the inputs of the second element OR, the output of which through the delay element is connected to the second inputs of the frequency dividers. The output of the first element OR is connected to the third input of the AND element, the output of which is connected to the input of the time interval generator, the output of which is connected to the third inputs of the AND elements — not:

The block diagram of the proposed device for controlling angle-code converters is shown in the drawing.

The device contains a controlled converter 1, a stable speed drive 2, a reference frequency generator 3, a shaper of 4 reference code change signals, a shaper of 5 real code change signals, a shaper of 6 time intervals, an information processing unit 7 and a logic unit 8 consisting of controlled dividers 9, 10 frequencies, trigger 11,

elements OR 12, 13, and 14, AND — NOT 15, 16 and delay element 17.

The device works as follows.

The input shaft of the controlled transducer 1 is driven into uniform rotation by a stable speed drive 2, the synchronization of which is provided by the reference frequency generator 3. At the output of the converter, when the input angular value passes from one quantized level to another, the code is changed, which is fixed by the shaper 5. The reference code change signal is generated by the shaper 4 by counting the number of reference frequency pulses fed to its input from the generator 3 during the calculated time interval. To ensure the initial faznki circuit the signal of the zero level from the output of the driver 5 is fed to the input of the driver 4.

Reference and real code change signals from the corresponding drivers 4,

5 through controlled dividers 9, 10 frequencies, the division ratio of which is pre-set equal to one, and the series-connected elements OR 12 and And 14 arrive at the input of the former 6 timeslots. At the output of the driver 6, a pulse is formed, the duration of which corresponds to the absolute value of the error of the converter 1 at this control point. Measurement and processing of the results are performed by the information processing unit 7.

If in the process of measuring the value of the error of the converter exceeds the value of the quantum of controlled discharge [δ (a)> “I, the device works as follows. Logic unit 8 solves the problem of determining the moment of successive arrival at its inputs of two like signals, the first of which is the start-pulse for the driver 6 and switches the circuit to the measurement mode of the converter error at every second point.

Let, for example, c) the control point realize the condition (a)> phi from the former 4 reference signals of the code change arrives. but two of them are not separated by a signal from shaper 5, and the first of these pulses opens “temporary gates” formed by shaper 6. At the same time, trigger 11 is set to one state. The element AND — NOT 15 turns out to be prepared by two inputs, and the second pulse from the frequency divider 9 closes the element AND 14 and prohibits the passage to the input of the former 6 of the false stop pulse. The “temporary gate” is closed by the following signal from the driver 5. Through the delay time, determined by the parameters of the delay element 17, the control 760162

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The inputs of the dividers 9 and 10 of the frequency provide a signal that sets the division ratio of the dividers to two. In this case, the magnitude of the quanta of the controlled discharge is doubled, and the determination of the error of the transducer is performed at every second point, relative to the initial operation mode.

Thus, information obtained directly in the measurement process about the magnitude of the error of the monitored transducer allows you to automatically select the optimal (from the point of view of reliability of operation) mode of the device.

Claims (1)

Claim Device for controlling angle-code converters, containing a reference frequency generator, the output of which is connected to the first input of the shaper of the reference code change signals and to the drive input ίο of a stable speed, kinematically connected with the controlled converter, the output of which is connected to the input of the real shaper code change signals the output of which is connected to the second input of the driver of the reference code change signals ²⁵ , the driver of time intervals, the output of which is connected to the input of the processing unit, characterized in that in order to improve the reliability of the device, a logic block, consisting of 6 From the frequency dividers, the trigger, the AND, OR, AND — NOT elements and the delay element, the shaper output of the reference code change signals and the second shaper output of the real code change signals are connected to the περί inputs of the first and second frequency dividers, respectively, the output of the first frequency divider is connected to the first inputs of the first element OR, the trigger and the first element AND — NOT, the output of the second frequency divider is connected to the second inputs of the first element OR and the trigger and the first input of the second element AND — NOT, the outputs of the trigger are connected to the second inputs of the corresponding elements AND — NOT, the outputs of which are connected to the first and second inputs of the element AND, and the inputs of the second element OR, whose output through the delay element is connected to the second inputs of the frequency dividers, the output of the first element OR connected to the third input of the element AND whose output is connected with the input of the shaper time intervals, the output of which is connected to the third inputs of the elements AND-NOT.