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Position signal fast decoding method and system

A decoding method and signal technology are applied in the field of fast decoding methods and systems for position signals, which can solve problems such as rising hardware costs, and achieve the effects of improving accuracy, improving counting precision, and reducing the number of chip instructions

Inactive Publication Date: 2017-07-14
GUANGZHOU HKUST FOK YING TUNG RES INST
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Problems solved by technology

This solution avoids taking up too much time on the main control chip, but the hardware cost increases significantly

Method used

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  • Position signal fast decoding method and system
  • Position signal fast decoding method and system
  • Position signal fast decoding method and system

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Embodiment Construction

[0046] refer to figure 1 , the present invention a kind of fast decoding method of position signal, comprises the following steps:

[0047] Select two pulse signals for measurement, buffer the two pulse signals in hardware, connect them to the XOR gate circuit for voltage adjustment, and then combine them to obtain sampling pulse signals, and connect them to the main control chip;

[0048] The main control chip captures the pulse edge of the sampling pulse signal, and corrects and calculates the sampling pulse time interval and pulse number;

[0049] According to the number of pulses and the time interval between adjacent pulses, the Newton-Raphson method is used for iterative calculation to obtain the pulse frequency and speed.

[0050] Further as a preferred embodiment, the main control chip includes but is not limited to DSP, ARM, FPGA or CPLD, and those skilled in the art can use a chip or an integrated circuit with the function of capturing the pulse edge signal as the m...

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Abstract

The invention provides a position signal fast decoding method and system. The method comprises the steps that two pulse signals for measuring are selected and combined to acquire a sampling pulse signal, and the signal accesses a main control chip; the main control chip corrects the sampling pulse signal to calculate the sampling pulse time interval and the number of pulses; and according to the number of pulses and adjacent pulse time interval, a Newton-Raphson method is used for iterative calculation to acquire the pulse frequency and speed. The system comprises a pulse signal processing unit, a correction calculation unit and an iterative calculation unit. According to the invention, the pulse signals are combined; the number of pulse edges can be doubled, which reduces the complexity of chip processing and improves the timing accuracy; in particular, the number of chip instructions can be greatly reduced when parallel processing events are required; compensation and correction methods can be combined to simultaneously improve the counting accuracy of the pulse frequency; the calculation accuracy is greatly improved; and the method and system can be widely applied in the field of integrated circuits.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a fast decoding method and system for position signals. Background technique [0002] In the prior art, special-purpose large-scale integrated circuits such as FPGA and CPLD logic gate array chips are used to process photoelectric signals. Generally, the frequency of these pulse signals is obtained through certain operations, but in some applications these chips need to cooperate with other chips. work, resulting in increased costs. [0003] Another commonly used existing technology is the capture port (capture port) of the DSP or ARM chip to perform calculations, but the disadvantage is obvious: when the frequency of the pulse signal is very low (less than 100Hz), it is easy to lose the pulse signal or cause a large number of calculations to take up a lot Operation instruction cycle, which is easy to cause insufficient time allocation in time-critical systems, thus ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/10H03K21/40
CPCG01R23/10H03K21/40
Inventor 王浩铎
Owner GUANGZHOU HKUST FOK YING TUNG RES INST
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