A signal compensation circuit for a water supply remote monitoring system

Abstract

The invention discloses a signal compensation circuit for a water supply remote monitoring system. The circuit comprises a frequency selection input circuit, a feedback compensation circuit and an operational amplifier output circuit, wherein the frequency selection input circuit receives a signal in a signal input end for receiving a signal by a control terminal in the water supply remote monitoring system; the feedback compensation circuit uses an inductor L1 and a capacitor C7,the capacitor C8 forms a filter circuit for filtering; meanwhile, the triode Q1 and the triode Q3 are used for forming a switching circuit to filter out abnormal amplitude signals in the signals; a compensation signal is improved for the output end of the comparator AR3 after a power supply + 5V is subjected to voltage division by a resistor R8; wherein the operational amplifier AR2 and the triode Q2 form a feedback circuit to feed back a signal to the inverting input end of the comparator AR3; and finally, the operational amplifier output circuit uses an operational amplifier AR4 to perform in-phase amplification on the signal and then outputs the signal, so that automatic frequency modulation calibrationcan be performed on the signal received by the control terminal in the water supply remote monitoring system by using the signal in the signal input end, signal compensation is performed, and frequency hopping and attenuation phenomena of the signal are prevented.

Description

technical field [0001] The invention relates to the field of circuit technology, in particular to a signal compensation circuit for a water supply remote monitoring system. Background technique [0002] In order to solve the problem of safe water supply for urban residents, many local water supply plants have built small water plants to collect groundwater or surface water and transport it to the water plant for treatment in the water plant. After reaching the drinking standard, it is transported to the main pipeline through a booster pump, and then the branch pipeline To send water to each urban household, in order to improve production efficiency and water supply management level, the water plant manager hopes to establish a set of remote monitoring and management system for water supply, that is, the signal compensation circuit for the remote monitoring system of water supply. However, the actual In the application, the signal in the signal input terminal of the control t...

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Problems solved by technology

[0002]In order to solve the problem of safe water supply for urban residents, many local tap water plants have built small water plants to collect groundwater or surface water and transport it to the water plant for treatment in the water plant to achieve drinking After standardization, the water is transported to the main pipeline through a booster pump, and then the water is sent to each urban household by a branch pipeline. In order to improve production efficiency and water supply management level, the water plant manager hopes to establish a remote monitoring and management system for water supply. That is, the signal compensation circuit used in the water supply remote monitoring system. However, in practical applications, the signal in the signal input terminal of the control terminal receiving signal in the water supply remote monitoring system encounters complex environments during transmission, such as humid and strong magnetic environments. In this case, the signal often appears frequency hopping and attenuation, which makes the signal distorted

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