A kind of optical dissolved oxygen sensor calibration method and calibration device
A technology of dissolved oxygen sensor and calibration method, applied in the field of optical dissolved oxygen sensor calibration, can solve the problems of consuming a lot of time and money, reducing the accuracy and reliability of measurement data, cutting off the continuity of monitoring data, etc., to achieve accuracy High, easy-to-use effects
Active Publication Date: 2022-07-29
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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[0004] Although optical sensors based on the principle of fluorescence quenching are suitable for long-term in-situ monitoring of dissolved oxygen, "storage drift" and "measurement drift" inevitably occur during the storage period from calibration to delivery and during practical application. "And other problems, which in turn lead to a great reduction in the accuracy and reliability of the measurement data, therefore, it is necessary to calibrate the sensor that has experienced data drift
However, the current mainstream calibration method is often concentrated in the laboratory. This method consumes a lot of time and money because the dissolved oxygen sensor needs to be retrieved from the field to the land laboratory, and the most important thing is to cut off the continuous monitoring data. Inability to meet the urgent needs of automatic in-situ calibration of dissolved oxygen sensors in the ocean monitoring process
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[0041] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0042] It should be noted that, in the description of the present invention, the terms "top", "bottom", "inner", "outer" and other terms indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only It is for ease of description, not to indicate or imply that the device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.
[0043] In addition, it should be noted that, in the description of the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be interpreted in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it ca...
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The invention discloses a calibration method and a calibration device for an optical dissolved oxygen sensor. The calibration device includes a sealed tank for encapsulating the optical dissolved oxygen sensor, a constant temperature water tank for adjusting the temperature in the tank, and an air bottle and a nitrogen bottle for inflating the sealed tank. , The sensor module and data acquisition and control unit to detect the temperature, pressure and humidity in the sealed tank, etc., provide hardware support for the in-situ detection and calibration of the dissolved oxygen content in the measured medium. The calibration method includes two stages: establishing an error model and calibrating, which not only can determine whether the optical dissolved oxygen sensor has a data drift problem, but also can calibrate the dissolved oxygen concentration detected by the drifted optical dissolved oxygen sensor. Accurate acquisition of dissolved oxygen concentration in the measured medium.
Description
technical field [0001] The invention belongs to the technical field of measuring instrument calibration, and in particular relates to a method and a device for calibrating an optical dissolved oxygen sensor with data drift. Background technique [0002] Dissolved oxygen is an important indicator to measure the quality of seawater and the degree of water pollution. It is the most important monitoring indicator in seawater besides temperature and salinity. The dissolved oxygen content in seawater has an important impact on marine life activities and marine aquaculture, and is an important basis for marine ecological environment assessment and marine scientific experiments. [0003] At present, the methods used to measure and analyze the dissolved oxygen content in seawater generally include iodometric method, electrode method, optical dissolved oxygen sensor measurement method, etc. Among them, the optical dissolved oxygen sensor based on the principle of fluorescence quenchi...
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IPC IPC(8): G01N21/64G01N33/00
CPCG01N21/6428G01N33/0006G01N2021/6432Y02A20/20G01N21/274G01N21/643G01N33/18G01N33/1886
Inventor 张颖颖高顺袁达张云燕吴丙伟冯现东
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI