Dissolved oxygen chip sensor self-calibration system and self-calibration method

Abstract

The invention discloses a dissolved oxygen chip sensor self-calibration system which is characterized in that the dissolved oxygen chip sensor self-calibration system comprises a shell, the interior of the shell is divided into an oxygen-free area and an air area by a partition plate, a sensor cabin, a mechanical control unit and an acquisition circuit data processing unit are arranged in the oxygen-free area, and a sensor channel is arranged in the air area; one end of the channel is connected with the sensor cabin, the other end of the channel leads to the outside of the shell, more than two dissolved oxygen chip sensors are placed in the sensor cabin, and the mechanical control unit pushes the dissolved oxygen chip sensors out of the shell from the channel one by one according to instructions. And the acquisition circuit data processing unit respectively acquires the readings of the dissolved oxygen chip sensor in the oxygen-free area and the air area, and uploads the readings to the upper computer. The self-calibration method of the dissolved oxygen chip sensor is matched with the self-calibration system, so that the problems of electric signal drift and the like caused by long-time placement can be timely corrected, and the reading accuracy of the chip sensor replaced every time is ensured.

Description

technical field [0001] The invention belongs to the field of chip sensors, in particular to a self-calibration system and a self-calibration method of a dissolved oxygen chip sensor in the field. Background technique [0002] In response to the increasingly serious water pollution, my country lacks practical and reliable sensor products. In the field of water environment monitoring, water quality sensors are the most basic and necessary instruments, and dissolved oxygen is one of the important data to be collected by water quality sensors. [0003] There are many different detection methods for dissolved oxygen in seawater, optical and electrochemical methods are two common methods. In order to ensure that the electrochemically generated signal is strong enough, the electrodes need to reach a certain size, and structures such as semi-permeable membranes and electrolytic cells are also required to achieve ion selection and buffering. Therefore, existing dissolved oxygen sens...

AI Technical Summary

Problems solved by technology

Therefore, the existing dissolved oxygen sensor products generally have the problems of large volume and low integration

However, due to electrode signal drift, electrolyte deterioration, and biological adhesion, existing dissolved oxygen sensor products require frequent maintenance, and large-scale applications require a lot of manpower and material resources for maintenance.

At present, most of the water quality sensors used in China are imported products, which are not only expensive, difficult after-sales service, but also have the risk of data leakage

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