Multi-frequency sounding device and method

Abstract

The invention relates to a multi-frequency sounding device. The multi-frequency sounding device comprises a transducer probe, a control display module, a transducer driving module, a data acquisition module and an echo signal processing module, wherein the transducer driving module is controlled by the control display module to drive the transducer probe to emit an amplitude-modulated signal, the amplitude-modulated signal can be demodulated into a low-frequency signal with the frequency twice that of an envelope signal in the amplitude-modulated signal in the transmission process, and the low-frequency signal and the original amplitude-modulated signal with the frequency unchanged reach the water bottom and then are reflected to generate echo signals; the low-frequency signal can be transmitted at the water bottom and is reflected after encountering another layer of medium interface to generate an echo signal; the reflected echo signals can be received by the transducer probe and then transmitted to the echo signal processing module through the data acquisition module, and the sounding result is calculated after the echo signals are filtered and amplified by the echo signal processing module.

Description

technical field [0001] The invention relates to the field of water depth measurement, in particular to a device and method for multi-frequency sound measurement. Background technique [0002] The primary measurement targets for underwater survey research and engineering construction are the depth of water body and the thickness of underwater sediments, and the acoustic method is the most effective and common method of water depth measurement. The principle of using the acoustic method to measure water depth is to use the underwater acoustic transducer to transmit the acoustic signal downwards. When the acoustic signal propagates in the water medium and encounters the bottom of the water, it is reflected back, the reflected signal is received, and the time difference between the transmitted signal and the received reflected signal is used. to calculate the water depth. [0003] Currently used depth sounder mainly has two working modes in terms of working frequency: single fr...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of high cost and inconvenient operation caused by the need for multiple transducers in the multi-frequency sounding device in the prior art, thereby providing a multi-frequency sounding device with low cost and easy operation

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