Detection signal real-time processing method and detector

Abstract

The invention provides a real-time processing method for a detection signal, and the method carries out the signal processing when the detection signal is converted from a high level to a low level or the low level is converted to the high level, and comprises the steps: recording a time point of the level conversion of the detection signal as a starting point, detecting the state of the detection signal at the current time point in real time, and comparing the current time width with the preset maximum interval width of the interference signals, and judging and recording the signal level from the starting point to the current time point. According to the characteristics of different interference signals, a targeted edge positioning and width identification method is adopted to carry out anti-interference processing, so that the delay influence of filtering on the signals is avoided, the weighing data identification precision of the checkweigher is improved, and the performance of the checkweigher is improved.

Description

technical field [0001] The invention relates to a real-time processing method of detection signals of a detector. Background technique [0002] In the process of the weighing object passing through the conveyor belt, the time of weighing the object is detected by the photoelectric detector, so as to identify the weighing stage when the object completely stays on the conveyor belt, and then according to the weighing stage The weighing data is used to calculate the checkweighing weight. [0003] The accurate and reliable signal of the photoelectric detector is a prerequisite for the accurate and reliable weighing of the checkweigher. During the weighing process, the detection signal of the photodetector is interfered by electrical interference and mechanical vibration, which affects the accuracy and reliability of the photodetector signal. Electrical interference is due to the periodic or short-term impact characteristics of the interference, resulting in the existence of pe...

AI Technical Summary

Problems solved by technology

[0004] Filtering methods are usually used to achieve anti-interference processing of photodetector signals, but the delay characteristics of these filtering methods will cause positioning delays in the time domain of the processed signals, and these delays are affected by factors such as the width and frequency of the interference signal. The size of the sensor will continue to change, resulting in a positional deviation of the positioning signal obtained from the photoelectric detection signal, which in turn leads to a positional deviation of the identified weighing data, thus reducing the weighing performance of the checkweigher

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