Special low-cost dissolved oxygen sensor for aquaculture

Abstract

The invention discloses a special low-cost dissolved oxygen sensor for aquaculture. The special low-cost dissolved oxygen sensor comprises an outlet cable, a sensor main body, a sensor electrode core, a millstone, a push rod motor, a protection cover and a connection piece, wherein the sensor main body comprises an analog-digital conversion circuit, a signal amplification circuit, a filter circuit and a microcontroller module which are connected with one another in sequence; the sensor electrode core comprises an anode and a cathode; and the sensor main body also comprises a clock module, an input setting module and a data storage module. The work period of the push rod motor can be preset, the service life of the sensor electrode core is prolonged, data is stored by the data storage module in real time, and thus data loss caused by sensor failure is avoided. The surface of the sensor electrode core can be cleaned automatically, the measurement precision is high, and the measurement precision is not influenced by water pollution and water flow speed. According to the specific implementation manner, the dissolved oxygen sensor has the advantages of simple structure, reasonable arrangement, low manufacture cost, and the like.

Description

technical field [0001] The invention relates to a dissolved oxygen sensor, in particular to a low-cost dissolved oxygen sensor dedicated to aquaculture, and belongs to the field of water quality detection. Background technique [0002] Whether it is natural water or sewage, some gases will be dissolved, and the sources are as follows: nitrogen and oxygen in the air; carbon dioxide, a product of the decomposition of organic matter in water; oxygen produced by the metabolism of aquatic organisms (such as the respiration of aquatic organisms such as algae) and carbon dioxide, molecular oxygen dissolved in water is called dissolved oxygen. [0003] The dissolved oxygen content in natural water depends on the balance of oxygen in the water and the atmosphere. The saturation content of dissolved oxygen in water is related to parameters such as atmospheric pressure and oxygen partial pressure, water body temperature and salinity. Dissolved oxygen in unpolluted water is saturated....

AI Technical Summary

Problems solved by technology

The chemical electrode method is easily interfered by various impurities in the water, the measurement accuracy is low, the electrolyte needs to be replaced regularly, and the use and maintenance are inconvenient

[0006] In recent years, a new method of measuring dissolved oxygen, the fluorescence method, has emerged. Compared with the chemical electrode method, the fluorescence method measures dissolved oxygen, which has been improved in terms of stability, anti-interference, measurement accuracy, life, and ease of maintenance. ;In practical applications, due to the large difference in water quality, dissolved oxygen probes need to be equipped with self-cleaning devices. Generally, cleaning brushes are used for cleaning, which increases the transmission mechanism, and the cleaning brush rubs against the sensor, which also reduces the life of the sensor.

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