Single-beam depth finder calibration method based on underwater echo simulation technology

Abstract

The invention discloses a single-beam depth finder calibration method based on an underwater echo simulation technology. The method comprises the steps of: S1, placing a transducer of a single-beam depth finder in a water tank, and transmitting a sound wave signal to an acoustic transponder through the transducer; S2, receiving a sound wave signal by the acoustic transponder to perform A / D acquisition and storage, and transmitting the A / D acquired signal to a PC terminal of the acoustic transponder; S3, setting a preset depth at the PC terminal of the acoustic transponder, and acquiring corresponding delay time through calculation according to the preset depth and the sound velocity value; S4, generating an analog echo signal according to the delay time by the PC terminal, calculating thesignal amplitude through an underwater sound wave attenuation reflection model, and sending the analog echo signal to the transducer by the acoustic transponder after D / A driving; and S5, after the transducer receives the analog echo signal, displaying a detection value by a display module of the single-beam depth finder, and comparing the detection value with a preset depth set by the PC terminalto realize calibration operation of the single-beam depth finder.

Description

technical field [0001] The invention relates to the field of depth sounders, in particular to a single-beam depth sounder calibration method based on underwater echo simulation technology. Background technique [0002] There are strict requirements on water depth in the construction of ports and wharfs, waterway regulation, and navigation construction. Currently, single-beam depth sounders are mostly used for water depth measurement. The main supporting equipment of the single-beam depth sounder's current metrological verification device is a special standard pool, which converts the depth measurement into a distance measurement, adopts the method of direct comparison of the horizontal length measurement, and compares the indicated value of the depth sounder with the known distance To calculate the measurement error, this method will be limited by the boundary conditions of the pool, and only short-distance "shallow water" comparison can be performed, and the operation in wa...

AI Technical Summary

Problems solved by technology

The main supporting equipment of the single-beam depth sounder's current metrological verification device is a special standard pool, which converts the depth measurement into a distance measurement, adopts the method of direct comparison of the horizontal length measurement, and compares the indicated value of the depth sounder with the known distance Calculate the measurement error. This method will be limited by the boundary conditions of the pool, and only short-distance "shallow water" comparisons can be made, and the operation in water is complicated and there are many uncertain factors

[0003] The device for calibrating the single-beam depth sounder with an electrical signal and an acoustic signal uses an analog signal generator to adjust the pulse delay. The electrical signal is used as a sounding echo to display the depth change, and the depth is set and the value of the sounder is calibrated. In contrast, its advantage is that the range is wide, and the sounding range can be set arbitrarily according to the requirements, but the signal generator is directly connected to the host of the sounder, and the influence of the response time of the sounder transducer on the result is not considered. The detection process does not include the calibration of the echo sounder transducer; in addition, the electrical signal port standards of different types of echo sounders are different, and the connection port between the calibration equipment and the calibration device must be changed according to the port of the echo sounder to be calibrated. Poor sex

[0004] The single-beam echo sounder simulation method based on the acoustic transducer is to use two transducers to receive and generate simulated echoes to calibrate the single-beam echo sounder, but the transmitting and receiving transducers of this method pass through the coupling agent and the sounding instrument. The working surfaces of the depth sounder transducers are directly bonded together, and the calibration process is carried out in the air, which is different from the underwater environment where the depth sounder actually works, and the service life of the transducer may be reduced or even damaged in the air. energy device; and its simulated echo signal does not consider the influence of different echo signal amplitudes at different distances

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