Shaft angle-of-turn-to-code converter

FIELD: computer engineering; data processing devices.

SUBSTANCE: proposed angle-of-turn-to-code converter has synchro resolver sensors, switching unit, inverter, two adding amplifiers, two integrators, functional voltage-to-code converter, threshold elements, 4NAND gate, integrator triggering and stopping unit, and counter.

EFFECT: enhanced precision characteristics of converter.

1 cl, 1 dwg

 

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

Known transducer angle shaft code containing sine-cosine transformer sensor, selector octanol summarizing large-scale amplifiers, linear reproduction device, a summing unit, a large-scale device, a comparator, a register and a control unit (see A.S. USSR №416717, CL. G 08 C 9/00, 1972).

The disadvantage of the Converter is its complexity and low accuracy.

Closest to the invention to the technical essence and the achieved result is a transducer angle of rotation of the shaft in the code adopted for the prototype and contains (see A.S. USSR №481929, CL. G 08 C 9/04, 1975) sine-cosine transformer sensors whose outputs are connected to inputs of the switch, the first and second outputs of which are connected respectively to the inputs of the first and second integrators directly and through pairwise connected threshold elements to the inputs of the element 4I, the output of which is connected to the input of the block start and stop integrators, the output of which is connected to the control input of the functional Converter the ratio of the voltage in the code and to the control inputs of the first and second integrators, the outputs of the cat is of which is connected to the inputs of the functional Converter the ratio of the voltage in the code the outputs of which are the outputs of the Converter.

The disadvantage of the Converter is low, the accuracy error due to an error due to the voltage drop on the wires in cases of long connections between the sine-cosine transformer sensors and directly by the Converter.

The purpose of the invention is improving the accuracy characteristics of the Converter.

This objective is achieved in that the inverter rotation angle of the shaft in the code that contains the sine-cosine transformer sensors whose outputs are connected to inputs of the switch, the first and second outputs through which United in pairs of threshold elements connected to the inputs of the element 4I, the output of which is connected to the input of the block start and stop integrators, the output of which is connected to the control input of the functional Converter the ratio of the voltage in the code and to the control inputs of the first and second integrators, the outputs are connected to the inputs of the functional Converter the ratio of the voltage in the code whose outputs are the outputs of the drive, put the inverter, the first and second summing amplifiers and a counter whose input is connected to the output of the block start and stop of the integrator, and the output connected to the control input of the switch, the first inputs of the first and second is umerous amplifiers connected respectively to first and second outputs of the switch, the second inputs of the joint and through the inverter connected to the shared bus sine-cosine transformer sensors, and the outputs of the first and second summing amplifiers connected respectively to the inputs of the first and second integrators.

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

The inverter rotation angle of the shaft into the code contains a sine-cosine transformer sensors 1, switch 2, the inverter 3, the first 4 and second 5 summing amplifiers, the first 6 and second 7 integrators, functional Converter 8 the ratio of the voltage in the code, the threshold elements 9 and 10, the element 4I-NO 11, block 12 starting and stopping of the integrators and the counter 13.

The outputs of the sine-cosine transformer sensors 1 are connected to inputs of the switch 2, the first and second outputs of the switch 2 are connected respectively to the first inputs of the first 4 and second 5 summing amplifiers directly and through pairwise connected threshold elements 9 and 10 with the inputs of the element 4I IS NOT 11, the output element 4I-NOT 11 connected to the input unit 12 start and stop integrators, the output unit 12 starting and stopping of integrators connected with the control input of the functional Converter 8 the ratio of the voltage in the code, with the control inputs of the first 6 and second 7 integrators and to the input of the counter 13, the output counter 13 is outinen with the control input of the switch 2, the second inputs of the first 4 and second 5 summing amplifiers and United through the inverter 3 is connected with a common bus sine-cosine transformer sensors 1, the outputs of the first 4 and second 5 summing amplifiers are connected respectively to the inputs of the first 6 and second 7 integrators, the outputs of the first 6 and second 7 integrators are connected with the inputs of the functional Converter 8 the ratio of the voltage in the code, the functional outputs of the Converter 8 the ratio of the voltage in the code are the outputs of the Converter.

The inverter rotation angle of the shaft into the code works as follows.

Voltage outputs sine-cosine transformer sensors 1, is proportional to sin αi and cos αi, through the switch 2, according to the selected counter 13 address corresponding to a particular input parameter, sequentially in time are received at the first inputs of the first 4 and second 5 summing amplifiers, the second inputs of which via inverter 3, with a ratio equal to the unit enters the inverse value of the voltage ΔU, equal in magnitude but opposite in phase to the voltage drop over long wires between the sine-cosine transformer sensors 1 and directly by the Converter. The first 4 and second 5 summing amplifiers summarize voltage applied to their inputs, p is item if the first input voltage is present, the corresponding positive half-wave of the signal voltages, - ΔU is added to the magnitude of the signal voltage, and if the first input is the voltage corresponding to the negative half-wave of the signal voltages, - ΔU is subtracted from the magnitude of the signal voltage. The voltage outputs of the first 4 and second 5 summing amplifiers come respectively to the inputs of the first 6 and second 7 integrators that integrate the input voltage during the half period of the signal voltage that provides a threshold elements 9 and 10 that are configured in pairs on the positive and negative threshold voltage, the element 4I-NOT 11 and block 12 start and stop integrators and thereby eliminates error from quadrature component and higher harmonics that are multiples of two. The voltage outputs of the first 6 and second 7 integrators, proportional to sin αi and cos αi arrive at the corresponding inputs of a functional Converter 8 the ratio of the voltage in the code that converts them into code angle Nαi.

Thus, the introduction into the inverter rotation angle of the shaft into the code of the inverter, first and second summing amplifiers and counter allows you to compensate for the error due to voltage drop on the wires in cases of long connections between the sine-cosinus the mi transformer sensors and the Converter and thereby to improve the accuracy characteristics of the Converter.

The inverter rotation angle of the shaft in the code that contains the sine-cosine transformer sensors whose outputs are connected to inputs of the switch, the first and second outputs through which United in pairs of threshold elements connected to the inputs of the element 4I, the output of which is connected to the input of the block start and stop integrators, the output of which is connected to the control input of the functional Converter the ratio of the voltage in the code and to the control inputs of the first and second integrators, the outputs are connected to the inputs of the functional Converter the ratio of the voltage in the code whose outputs are the outputs of the Converter, characterized in that it introduced the inverter, the first and second summing amplifiers and a counter whose input is connected to the output of the block start and stop of the integrator, and the output connected to the control input of the switch, the first inputs of the first and second summing amplifiers connected respectively to first and second outputs of the switch, the second inputs of the joint and through the inverter connected to the shared bus sine-cosine transformer sensors, and the outputs of the first and second summing amplifiers connected respectively to the inputs of the first and second integrators.



 

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