An Ultrasonic Ranging Method in Long-distance Scenarios

A distance measurement method and long-distance technology, applied in the direction of measuring devices, sound wave reradiation, radio wave measurement systems, etc., can solve the problems of high sampling rate, high acquisition cost, and increased use cost
CN112346062BActive Publication Date: 2021-07-06北京奥特雷柏科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
北京奥特雷柏科技有限公司
Publication Date
2021-07-06

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Abstract

The invention discloses an ultrasonic ranging method in a long-distance scene. The method includes: generating a measurement signal according to a measurement criterion of compressed sensing, and transmitting it through an ultrasonic transducer at a transmitting end; sampling and summing the received signal at a receiving end. After filtering, the effective signal interception is performed on the filtered sampling signal; the sparse channel signal is recovered from the intercepted effective signal by using the compressed sensing recovery algorithm; the first path signal and the first channel signal are obtained by peak screening from the sparse channel signal. The arrival time of the first path; multiply the arrival time of the first path by the propagation velocity to get the distance from the transmitting end to the receiving end. The method of the invention can measure accurate multi-path channels, realize high-precision distance measurement, and simultaneously ensure measurement stability; can acquire signals at a lower sampling frequency, realize super-resolution of distance measurement, and reduce distance measurement cost.
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Description

technical field

[0001] The invention relates to the field of ultrasonic positioning, in particular to an ultrasonic ranging method in a long-distance scene. Background technique

[0002] In the long-distance ranging of mechanical waves or electromagnetic waves, multipath problems are difficult to avoid; multipath signals will lead to a significant drop in ranging accuracy, especially the impact on ranging stability; increasing bandwidth is the key to suppressing multiple effective approach to the problem.

[0003] However, the bandwidth of the ultrasonic transducer is limited, and the multipath problem is particularly prominent; it limits the use of ultrasonic waves in long-distance ranging scenarios; in addition, the high frequency of ultrasonic waves requires a high sampling rate, resulting in high acquisition costs and a large amount of processed data. Increased use cost.

[0004] The undersampling feature of compressed sensing can greatly reduce the sampling frequency ...

Claims

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