Sewage level sensor fault instant diagnosing, alarming and switching device

Abstract

The invention discloses a sewage level sensor fault instant diagnosing, alarming and switching device. The device comprises a microprocessor, a data memory and a D / A converter, a signal processing and switching link, an amplifying and isolated outputting link and an alarm output, wherein the I / O data port of the microprocessor is connected with the serial port of the data memory, the data port of the D / A converter is connected with the data port of the signal processing and switching link, the I / O output port of the microprocessor is connected with the alarm output through an amplifier A, and the analog output port of the D / A converter is connected with the input end of the amplifying and isolated outputting link and the control signal input end of the signal processing and switching link. The device can be used to perform instant diagnosing and alarming to the sewage level sensor fault, effectively predict the fault, namely automatic control function disorder, caused by sewage level sensor fault and abnormal operation, of a pump station discharging system, perform switching control, avoid sewage leakage caused by the fault and the accident occurrences such as the damage of a pump and facilitate the fault to be instantly removed.

Description

technical field [0001] The invention relates to a sewage liquid level sensor fault instant diagnosis alarm switching control device. Background technique [0002] The data collected by the sensor is usually the control basis of the control system. In the sewage pumping station drainage system, the liquid level sensor, as the primary source of decision-making information, plays a vital role in controlling the operation accuracy and detecting the key liquid level. However, due to its long-term exposure to the sewage environment, it is easy to be fouled and aged and damaged. Once the sewage level sensor fails or does not work normally, it will directly cause the automatic control function of the sewage discharge system of the pump station to be disordered and the system will be paralyzed, which may cause major sewage overflow. , and even endanger accidents such as machine pump damage. Since there is no method and device for predicting and discovering sensor faults in time, us...

AI Technical Summary

Problems solved by technology

However, due to its long-term exposure to the sewage environment, it is easy to be fouled and aged and damaged. Once the sewage level sensor fails or does not work normally, it will directly cause the automatic control function of the sewage discharge system of the pump station to be disordered and the system will be paralyzed, which may cause major sewage overflow. , and even endanger the machine pump damage and other accidents

Since there is no method and device for predicting and discovering sensor faults in time, usually the troubleshooting of such faults can only rely on manual inference analysis and test comparison experiments, and the workload is heavy; at the same time, due to the lack of real-time diagnosis of traditional control systems Early warning, switching control, so the loss caused by sensor failure is staggering, which has attracted great attention from engineers and users, and has seriously affected people's acceptance of automation systems

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