A Method for Observing Two-Dimensional Temperature Field in Small-Scale Vertical Profile
A two-dimensional temperature field and vertical section technology, applied in thermometers, thermometers with physical/chemical changes, heat measurement, etc., can solve the limited temperature field information and cannot meet the high time and spatial resolution monitoring needs of small-scale waters, etc. problem, to achieve the effect of improving the accuracy
Active Publication Date: 2022-05-10
ZHEJIANG UNIV
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[0005] However, although the existing acoustic tomography technology can obtain large-area temperature field information through the inversion method, it can only calculate the layered average temperature along the sound ray path, and the obtained temperature field information is very limited, which cannot satisfy small High temporal and spatial resolution monitoring requirements for large-scale waters
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[0040] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the following embodiments are intended to facilitate the understanding of the present invention, but do not limit it in any way.
[0041] Such as figure 1 As shown, a small-scale vertical profile two-dimensional temperature field observation method includes the following steps:
[0042] Step 1: Cross-correlate the raw data obtained by the ultrasonic transceiver system to obtain the sound ray travel time. The observation of the small-scale temperature field is best to use the transmission mode of simultaneous transmission and reception, and at the same time, it is necessary to keep the position of the ultrasonic transceiver unchanged as much as possible. The first ultrasonic transceiver, the second ultrasonic transceiver and the third ultrasonic transceiver are respectively fixed underwater in the water area to be observed,...
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The invention discloses a small-scale vertical profile two-dimensional temperature field observation method, including: cross-correlating the obtained original data to obtain the sound ray propagation time; high-precision sound ray simulation to obtain the sound ray mode, reference propagation time and time Window information; multipath resolution and extraction, set the time window to extract the sound ray information corresponding to the sound ray simulation, calculate the arrival peak travel time and sound ray length of different paths; travel time preprocessing; Based on the principle of the sound ray, the grid is divided based on the distribution of the sound ray; the length and propagation time of the sound ray in each grid are calculated, the coefficient matrix is constructed, the two-dimensional temperature field of the vertical section is constructed, and the inversion in each grid is obtained Error; set the threshold, if the inversion error exceeds the set value, return to step 1 for iterative calculation until the inversion error meets the requirements; finally perform visualization. By using the invention, the accuracy and density of hydrological information measurement in small-scale water areas can be improved.
Description
technical field [0001] The invention belongs to the technical field of hydrological monitoring, and in particular relates to a small-scale vertical profile two-dimensional temperature field observation method. Background technique [0002] The distribution of temperature fields in small-scale waters such as marine pastures, shallow sea hydrothermal vents, and artificial upwelling is closely related to the marine environment. Temperature observations in small-scale waters are of great scientific significance to marine physics, chemistry, and ecology. The study of providing long-term, effective, and high-precision temperature field observation methods has attracted extensive attention from scholars at home and abroad. [0003] For example, the Chinese patent document with publication number CN108917841A discloses a temperature, salinity and depth measuring instrument. Currently, the temperature, salt and depth measurement system usually used for temperature observation has the...
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IPC IPC(8): G01K11/22
CPCG01K11/22
Inventor 黄豪彩谢心怡许世杰冯仁栋郭庸王章霖方圆力
Owner ZHEJIANG UNIV