Calibration Method for Large Water Depth Measurement Using Echo Sounding

A technology of echo sounding and correction method, which is applied in the direction of measuring devices, using re-radiation, re-radiation of sound waves, etc., which can solve the problems that the measuring personnel know the difference between the actual measured value and the true value, and cannot be detected.

Active Publication Date: 2017-12-12
BUREAU OF HYDROLOGY CHANGJIANG WATER RESOURCES COMMISSION
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Problems solved by technology

[0003] In view of this, the purpose of the present invention is to provide a correction method for large water depth measurement using echo sounding, which solves the problem that the existing echo sounder cannot let the surveying personnel know the actual measured value and the true value when measuring the water depth, especially the large water depth Whether the difference value meets the requirements of the specification, and whether the water depth value can not be detected through the sound velocity measured by the sound velocity profiler and the corrected measured value of the temperature difference is correct

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  • Calibration Method for Large Water Depth Measurement Using Echo Sounding
  • Calibration Method for Large Water Depth Measurement Using Echo Sounding
  • Calibration Method for Large Water Depth Measurement Using Echo Sounding

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[0015] In order to better understand the present invention, the invention will be described in detail below in conjunction with the accompanying drawings and specific examples.

[0016] In terms of echo sounding depth accuracy, there are mainly two influences: range measurement and sound velocity. Before the reservoir is completed, the conventional sounding instrument has an effective measuring range of 80m. After the reservoir is impounded, the water depth increases from 100m to 250m, which cannot meet the requirements of large water depth observation. It is necessary to configure a depth sounder with high power, large range and better performance, but the speed of sound is an important factor affecting large water depth measurement. . Before the reservoir is impounded, the water depth is shallow, the reservoir has no thermocline, and the sound velocity of the water body along the water depth direction is roughly the same. The solution can be solved by adjusting the sound ve...

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Abstract

The invention provides a correction method for large water depth measurement using echo sounding. The correction method for large water depth measurement using echo sounding corrects the sound velocity generated by the thermocline in the water body and corrects the global navigation satellite system. The time delay between the data collected by the receiver and the echo sounder is corrected to correct the water depth measurement value of the echo sounder. The correction method for large water depth measurement using echo sounding of the present invention can accurately detect the error and difference in water depth measurement of the echo sounder, the system delay problem, etc., and measure the water depth by measuring the temperature of the water body and the sound velocity profile of the actually measured water body. Make corrections and compare the corrected model with the true values ​​of the calibration targets at all levels to achieve the purpose of approximating the true value or the tolerance range of the error.

Description

【Technical field】 [0001] The invention relates to the field of water depth measurement, in particular to a correction method for large water depth measurement by using echo sounding. 【Background technique】 [0002] At present, in bathymetry, the method of mooring accuracy comparison and correction is generally adopted. There are two comparison measurement devices for the correction of the echo sounder in natural rivers, the comparison measurement of the measuring rod and the comparison measurement of the sounding hammer, but these two methods have more or less shortcomings. The disadvantage of using the measuring rod for comparison is: limited by the length of the measuring rod, it can only be compared for shoal waters below 3-5m, and it is difficult or even impossible to perform comparison measurement if it is deeper than 5m. The disadvantages of using the sounding hammer for comparison measurement are: the situation at the bottom is complicated, and there is also the infl...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S15/08G01S7/52
CPCG01S7/52006G01S15/08Y02A90/30
Inventor 王俊马耀昌欧应钧彭万兵杨世林冯国正周威
Owner BUREAU OF HYDROLOGY CHANGJIANG WATER RESOURCES COMMISSION
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