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| Research on Measurement Uncertainty of Dynamic ResponseCharacteristics of Ocean Temperature Sensor Based on LSM |
| WANG Peng-peng1,ZHAO Shi-wei1,MENG Wen-rong1,YE Song2 |
1. Unit 32217 of the PLA, Yantai, Shandong 264100, China
2. College of Meteorology Oceanography, National University of Defense Technology, Changsha,Hunan 410073, China |
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Abstract According to the requirements of dynamic response characteristics test of ocean temperature sensors, the time constant of typical ocean temperature sensor was tested through the time constant measuring device of hydrological sensor, and the characteristics of time constant were analyzed, the measurement results of time constant based on least square method(LSM) were comprehensively analyzed according to the principle of measuring device. The results show that the time constant has nothing to do with the temperature step, and the time constant and motion speed of different types of sensors meet different functional relations, which can be used to characterize the time constant characteristics of the sensor. Within the range of 0.5~ 3.0m/s, the relative expanded uncertainty of time constant measurement results is better than 10.2%, which is equivalent to the maximum allowable error of ±10%, meeting the performance requirements of time constant measurement device of hydrological sensor. The temperature fluctuation and uniformity of the water tank are the main sources of uncertainty. Creating an ideal step environment and maintaining the stability of the test environment can effectively reduce the uncertainty components introduced by the initial voltage, initial time and time constant, and the measurement accuracy of dynamic characteristics can be improved. The research results can provide technical reference for the development, testing and dynamic calibration technology of ocean temperature sensors.
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Received: 28 April 2022
Published: 25 June 2023
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2023, Vol. 44 
