Ultrasonic ranging sensor capable of resisting sound wave interference and ranging method thereof

Abstract

The invention discloses an ultrasonic ranging sensor capable of resisting sound wave interference and a ranging method thereof. The overall sensor is formed through encapsulation of an ultrasonic transducer, a signal processing circuit and a microprocessor. The microprocessor generates transmitted waveform feature parameter vectors X, and outputs transmitted signals; the signal processing circuitamplifies the transmitted signals to generate excitation signals; the ultrasonic transducer generates ultrasonic pulse signals, then the ultrasonic pulse signals are received, and echo signals are generated; the signal processing circuit amplifies and filters the echo signals; the microprocessor generates echo waveform feature parameter vectors Y; the microprocessor judges the relevancy of the transmitted waveform feature parameter vectors X and the echo waveform feature parameter vectors Y, the relevancy is larger than or equal to a set threshold value, and then the echo signals are received;the microprocessor calculates the distance between the sensor and a target object. By means of the ultrasonic ranging sensor, sound wave interference can be effectively inhibited, sound wave attack from a vicious attacker can be resisted, and accurate and reliable measurement of the distance of the target object is achieved.

Description

technical field [0001] The invention belongs to the technical field of sensor electronics, and in particular relates to an ultrasonic distance measuring sensor capable of resisting sound wave interference. Background technique [0002] The ultrasonic ranging sensor adopts the principle of echo ranging, by actively transmitting ultrasonic pulses, and then receiving the ultrasonic echoes reflected by the surface of the target, using time difference measurement technology to measure the distance between the sensor and the target, with accurate measurement, non-contact , waterproof, low cost, etc., can be used for liquid level, material level, material level detection, etc., and has a wide range of applications in industrial process control, autonomous vehicles, drones, robots, home security, biomedicine, basic public facilities, etc. application. The reliability of ultrasonic ranging sensors plays a vital role in the security and stability of these physical information systems...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention provides an ultrasonic ranging sensor capable of resisting acoustic wave interference and a ranging method thereof, so as to solve the technical problem that existing ultrasonic ranging sensors are easily interfered by acoustic waves (including unintentional crosstalk and malicious attacks)

Images