The Stability Evaluation of Marine Environmental Parameter Monitoring Sensors

Abstract

The performance of marine environment parameter monitoring sensor is the guarantee of the quality of marine environment parameter data. This paper used the sensors of seawater temperature, conductivity, turbidity and chlorophyll as evaluation targets. The historical calibration data of the same instrument was used to evaluate the stability of the sensors. When the drift coefficient was near 1, the sensor was stability, and the drift coefficient was more or less than 1, the sensor data was drifted. The drift coefficient could be used to correct the historical data of each sensor in the calibration period. Before the correction, the error of each sensor was large and presents a one-way incremental change; the corrected error was reduced to the maximum error of the sensor and had a normal distribution. The sensor performance evaluation model based on historical calibration data could provide long-term sensor stability evaluation for users, which was beneficial to improve the performance and data accuracy of marine environmental monitoring sensors, expand the service capacity of measurement data.

Keywords

• marine environment parameters
• sensor
• historical calibration data
• stability evaluation
• evaluation