Signal acquisition method and device having multi-channel signal acquisition

Abstract

The invention provides a signal acquisition method and a device having multi-channel signal acquisition. An analogue signal, which is amplified through a signal amplification module, is acquired through an MCU module. A compared digital signal is obtained through a signal comparison module. An acquisition manner of combination between a digital signal and the analogue signal is achieved so that a problem that only the digital signal is acquired and an analogue semaphore cannot be obtained is avoided. Rapid acquisition of a digital circuit and complete acquisition of the analogue signal are both achieved and are fully combined with each other. The method is applied in infrared touching and can increase a scanning speed of the infrared touching so that convenience in production is greatly improved.

Description

technical field [0001] The invention relates to the field of data acquisition, in particular to a method capable of collecting signals at high speed and a device with multi-channel signal acquisition. Background technique [0002] In the prior art, before collecting the AD signal, the analog signal is amplified first, and then the amplified analog signal is subjected to analog-to-digital conversion, and is transmitted to the control unit through the bus for information processing. In this process, it takes a long time to receive samples, which not only wastes system resources, but also affects the operating efficiency of the entire system. [0003] In the prior art, there is another way of signal sampling, which is to pass the analog signal through a digital signal comparator, compare it to get 0 or 1, and then transmit it to the control unit for information processing. Although this process shortens the signal sampling time, since the result obtained by the comparison of t...

AI Technical Summary

Problems solved by technology

Although this process shortens the signal sampling time, since the result obtained by the comparison of the digital signal comparator is only 0 or 1, the signal received by the control unit from the digital signal comparator is only 0 or 1, and the control unit cannot receive the actual signal. The signal value of

When some analog signals are very close to the critical point of the reference level, it will lead to misjudgment by the digital signal comparator, which will bring hidden dangers to product quality inspection, which is not conducive to the actual production to judge the quality of the test product

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