Multichannel supersonic wave barrier anti-crosstalk detection method

Abstract

The invention provides a multichannel supersonic wave barrier anti-crosstalk detection method. According to the method, convolutional encoding and a two-step correlation function are combined (2, 1, 2), convolutional coding are performed on supersonic wave emission signals, and de-noising processing is conducted on supersonic wave echo signals. The method comprises the steps: a microprocessor initializing various register parameters, a convolutional encoder and a supersonic wave signal transmit-receive period; gating corresponding supersonic wave channels, encoding the corresponding supersonic wave channels by means of a convolutional function, taking encoded sequence values as supersonic wave excitation signals and sending the excitation signals, starting an echo circuit, and enabling echoes to receive an interrupt register and an A/D acquisition register; acquiring A/D signals in real time, triggering an external interrupt register if echoes exit, recording the arrival time, starting a timer, and acquiring and storing echo signals; and then closing a timing register, conducting two-step correlation processing on the acquired echo signals and excitation waves by means of the microprocessor, calculating an barrier distance according to the obtained time if the acquired echo signals and the excitation waves are correlated, otherwise, giving up and receiving next echoes.

Description

technical field [0001] This patent belongs to the control technology in the fields of electronic measurement, industrial measurement, and biomedical detection, and relates to a multi-channel ultrasonic obstacle anti-crosstalk detection method proposed by the present invention. Background technique [0002] Ultrasonic testing technology is widely used in industrial fields and biomedical fields, such as automotive active safety, industrial robots, medical fluid detection and other industries. A good ultrasonic obstacle detection technology should be able to effectively avoid crosstalk, and at the same time be able to accurately identify the distance range where the obstacle is located. [0003] The essence of ultrasonic obstacle detection is to transmit ultrasonic excitation signals of a certain frequency and period through the sensor. If there is an obstacle within its detection range, the signal will be reflected back to the sensor in the form of echo. When the sensor detect...

AI Technical Summary

Problems solved by technology

Although there are many ultrasonic detection implementation methods in the existing patents, there is no detailed description of how to distinguish each channel ultrasonic detection in the face of multi-channel ultrasonic detection.

However, the crosstalk problem of multi-channel ultrasonic detection has not been introduced, and there is no related patent to describe how to solve this problem

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