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Signal processing apparatus applied to time-varying signals

A signal processing device and time-varying signal technology, applied in general control systems, instruments, digital control, etc., can solve problems such as attenuation and inability to display the correct position and speed of the servo motor 130

Active Publication Date: 2015-06-10
RDC SEMICON CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Furthermore, due to temperature or environmental factors during the photoelectric conversion process, the two photoelectric signals A and B will have a DC offset (DC offset), amplitude attenuation, and the phase difference will not be maintained at 90 degrees. problem, so that the feedback pulse cannot indicate the correct position and speed of the servo motor 130

Method used

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  • Signal processing apparatus applied to time-varying signals
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  • Signal processing apparatus applied to time-varying signals

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Embodiment Construction

[0044] Please refer to figure 2, which shows a signal processing device of the present invention applied to time-varying signals. The signal processing device of the present invention can be used in a photoelectric encoder to receive the time-varying photoelectric signals Ain and Bin output by the photodetector. The signal processing device includes: a DC offset (DC offset) adjustment unit 210 , a phase adjustment unit 220 , and an amplitude adjustment unit 230 . Wherein, the DC offset adjustment unit 210 receives the first photoelectric signal Ain and the second photoelectric signal Bin, and after eliminating the DC offset in the first photoelectric signal Ain and the second photoelectric signal Bin, outputs the first adjustment signal A1 and the second photoelectric signal A1. Adjust signal B1. Furthermore, the phase adjustment unit 220 receives the first adjustment signal A1 and the second adjustment signal B1, and controls the phase difference between the first adjustme...

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Abstract

The invention discloses a signal processing apparatus applied to time-varying signals. The signal processing apparatus comprises a summator and a weighting integrator. The summator is used for receiving a first input signal and an integrated signal and generating a first output signal, wherein the first output signal is equal to a result obtained by subjecting the first input signal and the integrated signal to subtraction. The weighting integrator is used for receiving the first output signal and generating the integrated signal and comprises a weighting function generator, a multiplier and an accumulator, wherein the weighting function generator is used for receiving the first output signal and generating a weighting function when the first output signal passes by the position nearby a zero crossing point, the multiplier is used for multiplying the weighting function by the first output signal, and the accumulator is connected with the multiplier and used for accumulating the result obtained by multiplying the weighting function by the first output signal and generating the integrated signal according to the accumulated result. The signal processing apparatus applied to the time-varying signals has the advantage that direct-current offset in a photoelectronic signal can be eliminated.

Description

technical field [0001] The present invention relates to a signal processing device, and in particular to a signal processing device applied to time-varying signals in a servo motor system. Background technique [0002] As we all know, the servo motor system can accurately control the rotation speed of the servo motor, and has the ability to accelerate, decelerate, and reverse quickly. That is, since the servo motor system has the capability of precise position control and speed control, it has been widely used in various automation industries and precision machining fields. For example, a robotic arm, or a mechanical working platform, etc. [0003] Please refer to Figure 1A , which shows a schematic diagram of the servo motor system. The servo motor system includes: a command device 110 , a micro controller (micro controller) 120 , a servo motor 130 , and an optical encoder (optical encoder) 140 . [0004] The command device 110 outputs command pulses according to the us...

Claims

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Application Information

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IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/37151
Inventor 严明洲
Owner RDC SEMICON CO LTD
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