Design and application of dynamic characteristics testing platform for ocean temperature and salinity sensors
In ocean profile observations and mobile platform-based observations,the dynamic performance of ocean temperature and salinity sensors directly affects the quality of their data.Currently,a platform for testing the dynamic characteristics of ocean temperature and conductivity sensors has been developed domestically.This paper elaborates on the design and implementation process of an ocean thermohaline interface simulation device based on double diffusion principles.The device,towering 5 m high,effectively simulates the vertical stratification phenomena found in nature,providing the best simulation of natural stratification.It achieves temperature differences of 10℃and salinity differences of 10 mS/cm at thermohaline interfaces,with a motion control subsystem capable of simulating sensor movement states from 0.1 to 3.0 m/s.Tests using SBE3 temperature sensors,SBE4 conductivity sensors,and the MSCTI 125 fast thermosalinometer show that the platform effectively replicates vertical stratification thermohaline layers,enabling dynamic testing of temperature and conductivity sensors.Algorithm results for time constants closely match sensor nominal values.Analysis of test results indicates that the platform is more suitable for testing point-like sensing elements,with the packaging structure of sensing elements having a significant impact on dynamic response.The development of this platform provides a new testing platform and method for subsequent studies on the dynamic characteristics of ocean temperature and salinity,facilitating further research in this field.
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