Quadrature modulation-based linear ocean profile temperature measuring method
A technology of temperature measurement and ocean profile, applied in thermometers, measuring devices, measuring heat, etc., can solve the problems of complex temperature sensor system, limited number of measurement points, and influence of marine organisms, and achieve strong maintainability and less demand for auxiliary equipment , layout simple and flexible effects
Active Publication Date: 2014-03-12
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology
Because most of the ocean observation instruments are imported, and the cost is high; various temperature sensors are complex in use, bulky, and require a lot of auxiliary equipment, the number of measurement points is limited; the use of ocean acoustic temperature measurement requires the deployment of multiple transmitters and Receiving equipment, which will affect marine life
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[0015] Because some metals have a linear function relationship between the resistance R and the temperature t under certain temperature conditions (the metal copper is taken as an example below), it is an ideal material for making thermal resistance. For example, the resistance temperature characteristic of copper resistance in the range of -50°C to 150°C (meeting the seawater temperature measurement range) is almost linear, and the linear relationship expression between its resistance value and temperature can be expressed as:
[0016] R t =R 0 (1+at) (1)
[0017] where R t is the resistance value when the temperature is t°C, R 0 is the resistance value when the temperature is 0°C, and α is the temperature coefficient of resistance. Therefore, put the copper wire bundle into the seawater, and the temperature at different seawater depths can be obtained according to the resistance values of the different sections of the copper wire.
[0018] In order to obtain the tempe...
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The invention discloses a linear temperature measuring method which is applied to ocean environment, is based on quadrature modulation, is convenient to implement and can be flexibly arranged and implemented. The quadrature modulation is carried out on metal wires by a device, the shapes of all the metal wires are confirmed by an orthogonal function, and the vertical section temperature measurement for the ocean environment with different depths can be finally realized by calculation according to the obtained resistance values of the metal wires on different vertical sections. The technical effects that the method is fewer in electronic components, high in reliability, high in maintainability, low in system complexity and the like can be realized.
Description
technical field [0001] The invention relates to a temperature measurement method applied to the marine environment, in particular to a linear temperature measurement method based on orthogonal modulation (such as the Walsh function), which is easy to implement and can be flexibly arranged and implemented, and can realize vertical profiles of oceans at different depths temperature measurement. Background technique [0002] In the survey of marine environment, seawater profile temperature is one of the important basic parameters and the most basic physical quantity reflecting the state of seawater. It is of great significance to the study of marine science, climate, marine environment and marine fishery. Therefore, the measurement of seawater temperature is the focus of ocean observation and research. [0003] As the depth of seawater changes, its temperature also varies, creating a vertical gradient in seawater temperature. In order to obtain the seawater temperature at dif...
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Inventor 解维浩周斌刘恩晓孙小玲杨雷许光
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI