Distance measurement method, device and system and computer readable storage medium

Abstract

The invention discloses a distance measuring method, a distance measuring device, a distance measuring system and a nonvolatile computer readable storage medium. The distance measurement method comprises the following steps: acquiring the predicted interruption frequency of a single-chip microcomputer; acquiring a to-be-detected signal; triggering a first output of a comparator according to the intensity of the to-be-detected signal and a preset triggering threshold value; recording the ultrasonic signal according to the first output and acquiring the actual interruption frequency; and adjusting a trigger threshold according to the predicted interruption frequency and the actual interruption frequency, wherein the adjusted trigger threshold is used for triggering the first output next time. According to the distance measurement method, the distance measurement device, the distance measurement system and the non-volatile computer readable storage medium, the trigger threshold value of the comparator can be adaptively adjusted according to the interruption frequency of the single-chip microcomputer so as to adjust the sensitivity of recording the ultrasonic signal; therefore, the method can adapt to different measurement environments and measurement ranges, achieves the accurate recording of the arrival time of the ultrasonic signal, and improves the accuracy of a distance measurement result.

Description

technical field [0001] The present application relates to the field of distance measurement, and more specifically, to a distance measurement method, a distance measurement device, a distance measurement system, and a non-volatile computer-readable storage medium. Background technique [0002] Some ranging methods measure distance by transmitting a ranging signal and acquiring the "time-of-flight" of the ranging signal. Accurately confirming the arrival time of ranging signals is the key to ensuring accurate ranging results. In some ranging scenarios, the measurement object is a moving object, the measured distance changes, and the "flying distance" of the ranging signal also changes. The farther the "flying distance", the higher the attenuation of the ranging signal, making it difficult to be accurate The time of arrival of the ranging signal is discriminated. Contents of the invention [0003] Embodiments of the present application provide a ranging method, a ranging d...

AI Technical Summary

Problems solved by technology

In some ranging scenarios, the measurement object is a moving object, the measured distance changes, and the "flying distance" of the ranging signal also changes. The farther the "flying distance", the higher the attenuation of the ranging signal, making it difficult to be accurate Discriminate the arrival time of the ranging signal

Images