Control system used for COD on-line automatic monitor

Abstract

The invention relates to a control system used for a COD on-line automatic monitor, which comprises a multi-input program control integrated operational amplifier, an analog-to-digital converter, a microprocessor, a digital-to-analog converter and a multi-path control relay, wherein the multi-input program control integrated operational amplifier receives external detection signals; the analog-to-digital converter performs analog-to-digital conversion for the external signals; the microprocessor processes the digital signals sent by the analog-to-digital converter, transmits the processed light intensity value feedback signals to the digital-to-analog converter, converts the processed photoelectric signals into COD signal values to be output outside through an output module, and sends theprocessed other command signals to the multi-path control relay; the digital-to-analog converter performs digital-to-analog conversion for the light intensity value feedback signals sent by the microprocessor, and outputs the converted analog signals; and the multi-path control relay receives the other command signals sent by the microprocessor to perform corresponding control for the external equipment. The control system can implement on-line automatic monitoring for water pollution, can implement remote control for instruments, and has stable operation performance.

Description

technical field [0001] The invention relates to an online automatic monitoring device for chemical oxygen demand (COD) in water resources, in particular to an automatic control system for the online monitoring device. Background technique [0002] With the continuous increase of the global population, the continuous progress of society, the acceleration of urbanization, and the rapid development of industry and agriculture, a large amount of pollutants have been produced, which has caused serious damage to the environment, especially water resources. At present, more than 420 billion cubic meters of sewage are discharged into rivers, lakes and seas in the world every year, and about 5.5 trillion cubic meters of fresh water are polluted, which is equivalent to more than 14% of the total global runoff. [0003] At present, the primary pollutant of my country's water environment is chemical oxygen demand (COD). The higher the COD value, the more serious the pollution of the wat...

AI Technical Summary

Problems solved by technology

The heating and reflux experiment in the laboratory takes up to two hours, and all operations must be performed manually, which cannot meet the monitoring requirements at all

Moreover, the existing domestically-made online automatic monitoring equipment for chemical oxygen demand is unstable and does not have a remote control system, which brings troubles for online monitoring of the water environment and data collection and comparison

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