SU898483A1 - Shaft angular position-to-code converter - Google Patents

Description

The invention relates to computing and can be used to convert angular displacements into code.

The angle-code converter is known, which contains a phase shifter, two nullorgans, a clock generator and a pulse counter operating according to the angle-phase-g principle, time interval code-1.

The disadvantage of the converter is its complexity.

Also known is a shaft angle converter into a code comprising a clock pulse generator, a phase shifter, a frequency divider, a sinusoidal voltage shaping unit, a null organ, a conversion acceleration logic unit, and a code register with coincidence devices 2.

The scheme uses the principle of converting the yi-jiuBbix displacements to the time interval (phase shift) and direct measurement of the phase shift. In addition, an intermediate conversion of rectangular pulses into a sinusoidal signal is used. All this leads to a decrease in the accuracy of conversion as a result of direct

measurements of the phase shift, the possibility of errors in the frequency divider register and failures of the sinusoidal voltage shaping unit.

The aim of the invention is to improve the accuracy of the converter angle of rotation of the shaft in the code.

Claims (2)

The goal is achieved by the fact that an inverter, a code-phase converter, is inserted into the converter of the angle of rotation of the shaft into a code containing a clock pulse generator, the output of which is connected through a frequency divider to one input of the coincidence device, the output of which is connected to the register register input, and phase shifter phase comparator and square pulse shaper, the input of which is connected to the output of the phase shifter and the output to the first input of the phase comparator, the other input of which is connected to the output of the code phase converter the output of the phase comparator is connected via an inverter to another input of the coincidence device, the output of the code register is connected to the output of the converter and to the digital input of the code-phase converter, the counting input of which is connected to the output of the clock generator, whose input is connected with the reference input transformer l, which is connected to the reference input of the phase switch. The drawing shows a flowchart for converting an angle of rotation into a code. The converter contains phase shifter 1, shaper of 2 direct angular pulses, phase comparator 3, converter 4 code-phase, generator 5 clock pulses, inverter 6, device 7 coincidence, register 8 code, divider 9 frequency, output 10 converter, reference input 11 converter. Converter angle of rotation of the shaft in the code works as follows. The generator 5 produces pulses synchronized in frequency with the reference voltage of the phase switch 1, which is fed to the code-phase converter 4 controlled by the register code 8. From the code-4 converter 4, the signal shifted by a phase proportional to the register code 8 is supplied by one From the inputs of the phase comparator 3. The other input of the phase comparator 3 receives a signal from the former of 2 pulses with a phase shift proportional to the angle of the measured signal. If the phases of the information signal and the signal from the converter 4 code-phase do not coincide, then the output of the phase comparator 3 does not have a signal and, therefore, there is a logical unit at the output of the inverter that opens the device 7 of the match. At the same time, through the frequency divider 9 and the open device 7 of the match 7, another pulse is added to the code register 8. The described process is repeated until the phases of the information signal and the signal with the converter 4 code-phase NB coincide. In this case, at the output of the comparator 3, a signal appears which, through the inverter 6, discharges the coincidence device 7, the measurement process is terminated. The economic effect of the use of the invention is due to its technical features given above. Claims The shaft angle converter is a code comprising a clock pulse generator, the output of which is connected via a frequency divider to one input of a coincidence device, the output of which is connected to the code register input, and a phase shifter characterized in that, in order to improve the accuracy of the converter, Inverter, code-phase converter, introduced. phase comparator and square pulse shaper, whose input is connected to the output of the phase shifter and the output to the first input of the phase comparator, another input of which is connected to the output of the code-phase converter, the output of the phase comparator through the inverter is connected to another input of the coincidence device, register output connected to the output of the converter and to the digital input of the code-phase converter, the counting input of which is connected to the output of the clock generator, the input of which is connected to the reference input of the conversion Atel, which is connected to the reference input of the phase shifter. Sources of information taken into account in the examination 1. A.Ahmetzhanov A.A. High-precision angle transmission systems for automatic devices. M., Energie, 1975, pp.209-211. 2. USSR author's certificate number 346793, cl. G 08 C 9/00, 1970 (prototype)