Method and device for measuring sound velocity in water
A technology of measuring device and measuring method, applied in measuring device, measuring propagation speed, measuring ultrasonic/sonic/infrasonic wave and other directions, can solve the problem of low measurement rate, unable to meet the needs of high-precision sound speed measurement, and difficult to meet the measurement in occasions where the speed of sound changes rapidly Application and other issues, to achieve the effect of improving timing accuracy, improving measurement efficiency and sound velocity measurement accuracy, and novel design
Active Publication Date: 2020-01-17
BEIJING HYDRO TECH MARINE TECH CO LTD
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Problems solved by technology
The measurement accuracy of the "ringing method" generally can only reach ±0.2 m / s at the highest, which can no longer meet the demand for high-precision sound velocity measurement
At the same time, the "ringing method" requires multiple cycles, so its measurement rate is relatively low, and it is difficult to meet the measurement application of the rapid change of sound velocity
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[0026] specific implementation plan
[0027] The present invention will be further described below in conjunction with the accompanying drawings and a preferred specific embodiment of the present invention.
[0028] As a preferred embodiment of the present invention, in the underwater sound velocity measuring device, the cylindrical casing (101) is made of austenitic stainless steel, and a remo waterproof connector (102) is fixed on one end of the casing (101), a The stainless steel acoustic reflection plate (107) is fixed on the other end of the casing (101) through the connecting rod (108) on the reflection surface, and a piston-type acoustic transducer (106) with a frequency of 2 MHz is fixed on the reflection plate ( 107) side, install water temperature sensor (105) at this position simultaneously, internal temperature sensor (104) and functional circuit (103) are installed in casing (101) inside.
[0029] As a preferred embodiment of the present invention, the functional...
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The invention discloses a method for measuring sound velocity in water. The method specifically includes the following steps: measuring the sum T of the propagation time of the electrical signal in the ultrasonic transceiver circuit and the propagation time of the acoustic signal in water at a fixed distance D S ; Measure the propagation time T of the electrical signal in the ultrasonic transceiver circuit b ; Measure the temperature T of the internal temperature sensor 1 and water temperature sensor temperature T 2 ; Calculate the sound velocity value c using the calculation method with temperature compensation. This method uses the time difference technology to eliminate the influence of circuit element delay on the measurement results, and uses multiple temperature sensors to correct the temperature to reduce the influence of ambient temperature changes on the sound velocity measurement. At the same time, this method also uses the gate delay time measurement technology The high-precision timing unit further improves the measurement accuracy of sound velocity in water. It ensures that a single measurement can obtain high-precision measurement results, and greatly improves the measurement efficiency and sound velocity measurement accuracy.
Description
technical field [0001] The invention relates to the measurement technology of sound velocity in water, in particular, relates to a method and a device for measuring sound propagation velocity in liquid by using an ultrasonic device. Background technique [0002] As an important parameter of all sonar equipment, the speed of sound in water is widely used in various military and civilian fields such as marine survey, underwater engineering, underwater surveying and mapping, underwater navigation and positioning. With the upgrading of various sonar equipment, higher and higher requirements are put forward for the accuracy of sound velocity measurement. Therefore, high-precision underwater sound velocity measurement devices also play a vital role in the technical improvement of related fields. [0003] As one of the basic physical parameters, the speed of sound in water generally ranges from 1400 m / s to 1600 m / s, and is mainly related to the three basic physical parameters of te...
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IPC IPC(8): G01H5/00
CPCG01H5/00
Inventor 汤云龙鲁东赵园王尔迅金旗林
Owner BEIJING HYDRO TECH MARINE TECH CO LTD