As one of the seven basic units in the International System of Units (SI), the temperature quantity is also the most important physical parameter of the ocean. The development of high-performance temperature sensing technology methods and sensors to achieve high-precision measurement of ocean temperature and compensation of elemental parameters is an important guarantee to improve ocean monitoring technology and promote the development of ocean resources. In this paper, we use mask lithography method combined with magnetron sputtering method to study the effect of microstructure size parameters of platinum film resistors on their temperature sensing performance, such as temperature coefficient, measurement accuracy, etc. This experiment simply and accurately determines the effect of the length and width of the resistor wire on the measurement error and temperature coefficient (TCR) of the platinum film resistor, and achieves the preparation of high precision and high stability platinum film resistors by controlling the structural parameters of the platinum film resistor wire.
In order to overcome the shortcomings of poor stability of existing electrode materials, a salinity sensor based on borondoped diamond film (BDD) electrodes is designed in this paper. The electrode of the salinity sensor has excellent characteristics such as wide electrochemical window, large background current, high mechanical strength, corrosion resistance, etc., which can improve the stability and accuracy of the conductivity cell measurement, which is very important for the field of ocean salinity measurement significance. In this paper, based on the measurement principle of the sevenelectrode sensor and the preparation of the diamond film probe, the conductivity cell is studied and designed, the measurement circuit is analyzed and the design of low power consumption is carried out, and then the calibration and fitting of the seven-electrode conductivity sensor are carried out. Finally, data analysis is used to verify that the sensor has achieved stable, reliable, and high-precision measurement performance.
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