Rainfall signal processing circuit with isolation and locking functions

Abstract

The invention discloses a rainfall signal processing circuit with isolation and locking functions. The rainfall signal processing circuit comprises a photoelectric coupler U. A fifth pin of the photoelectric coupler is connected with a resistor R6 and a resistor R5 in sequence and then connected with a power source Vcc, and a rainfall signal enters the photoelectric coupler U through the resistor R6 and is output through a second pin of the photoelectric coupler U. The rainfall signal processing circuit further comprises a diode D1, a diode D2, a diode D3 and a diode D4. The anode of the diode D1 is connected with a resistor R2. The anode of the diode D2 is connected with the second pin of the photoelectric coupler U. The anode of the diode D3 is grounded. The cathode of the diode D3 is connected with the cathode of the diode D1. The anode of the diode D4 is grounded. The cathode of the diode D4 is connected with the cathode of the diode D2. By the adoption of the structure, the effects of protecting and reshaping the rainfall signal can be achieved; besides, the photoelectric coupler can play a role in isolation and locking.

Description

technical field [0001] The invention relates to the field of rainfall monitoring, in particular to a rainfall signal processing circuit with isolation and locking functions. Background technique [0002] The flood early warning system comprehensively uses technologies such as hydrology, communication, computer and automatic control to collect real-time, fast and accurate rainwater information at each representative point in the basin, and transmits it to the relevant flood control command department to provide flood control scheduling, flood control and disaster reduction, and flood control for the reservoir. Provide scientific basis for decision-making. The main task of the remote water and rain monitoring system is to complete the collection, transmission, and storage of rainfall, water level, and flow data in real time, and send them to the server in the monitoring center for processing in real time. [0003] Remote monitoring systems usually use methods such as ultrasho...

AI Technical Summary

Problems solved by technology

These methods have some limitations, such as the use of ultrashort wave communication and digital microwave communication, which need to set up relay stations, the initial investment and later maintenance costs are high, and there are defects such as insufficient frequency resources; although satellite communication can have a wider coverage, there are Dependence on satellites, large investment and being easily affected by other factors

[0004] At present, there are also some new water and rain remote detection station systems, which are used to analyze signals such as rainfall and water level. However, since other interference signals may be carried in the rainfall signal, if the signal detected by the rain sensor is directly transmitted to the microcontroller, it is easy to affect The accuracy and precision of detection may also cause impact on the circuit. Therefore, the current monitoring system is not perfect

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