Low-cost dissolved oxygen sensor

Abstract

The invention discloses a low-cost dissolved oxygen sensor, which comprises an outlet cable, an outlet cable protective cover, a sensor body, a sensor electrode core, a grindstone, a push rod motor, a protective cover, and a connecting piece. One end of the sensor body is connected to the outlet cable The other end of the sensor body is connected to the sensor electrode core. The sensor body also includes a clock module, an input setting module and a data storage module, which can pre-set the working cycle of the push rod motor and extend the sensor electrode core. service life, and real-time storage through the data storage module to avoid data loss caused by sensor failure. The surface of the sensor electrode core of the present invention can be cleaned automatically, and the measurement accuracy is high, and the measurement accuracy is not affected by water pollution and water flow speed. This specific embodiment The utility model has the advantages of simple structure, reasonable setting, low production 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, which belongs to the field of water quality detection. Background technique [0002] 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. When the water body is polluted, the dissolved oxygen in the water will be continuously consumed due to the existence of aerobic bacteria. If the air cannot be replenished in time, the dissolved oxygen in the water will gradually decrease, eventually leading to the deterioration of the water body. Therefore, dissolved oxygen is used as an indicator of the degree of water pollution; the less dissolved oxygen, the more serious the degree...

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

[0005] 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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