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Application of Optical Rain Gauge in Rainfall Monitoring

by:Rika Sensors     2021-10-01
Application of Optical Rain Gauge in Rainfall Monitoring
Precipitation information is the main object of measuring atmospheric environment research and precipitation research, and it is also an important index parameter for environmental monitoring and agricultural safety monitoring. Usually we monitor rainfall, usually using tipping bucket or siphon rain gauge to perceive the rainfall in nature, and at the same time convert it into the corresponding switch signal output, which can meet the information transmission, processing, and processing in most scenes. The need for recording and display.

However, this method has a relatively single function. By using mechanical equipment to measure rainfall, although rainfall data can be obtained, it cannot reflect the magnitude of rainfall in real time, and can only count the rainfall within a certain period of time. For some industries that require multiple rainfall data, the function is slightly insufficient. But the emergence of optical rain gauges solved this problem.

Foreign optical rain gauges started relatively early. As early as the 1950s, they began to study optical rain monitoring technology. At present, continuous, non-contact automatic measurement of precipitation has been basically realized, which can effectively improve The microscopic information of precipitation monitoring in unit time. The detection principles adopted by the existing optical rain gauges are mainly the scattering measurement method, the extinction shading method, and the image acquisition method.

What is an optical rain gauge?

When raindrops (or other precipitation particles such as snow particles) pass through the sampling space, the raindrops will block the laser, and the light signal received by the sensor and the electrical signal (such as voltage or current) converted from the light signal will change. When the raindrops pass through the sampling space, the electrical signal of the receiving sensor is restored to the state before the raindrops entered the sampling space. When the raindrops pass through the sampling space, the electrical signals of the receiving sensor are processed, and the time for the raindrops to pass through the sampling space can be obtained.

Optical Rain Gauge

The optical rain sensor produced by the optical rain gauge is a product that measures rainfall. It uses the principle of optical sensing to measure rainfall. Built-in multiple optical probes ensure reliable rainfall detection, which is different from traditional machinery. Rainfall sensor, optical rain sensor is smaller, more sensitive and reliable, smarter and easier to maintain. It can be widely used in industries and fields such as smart irrigation, ship navigation, mobile weather stations, automatic doors and windows, and geological disasters.

The structural characteristics of the optical rain gauge

1. Small size, light weight, and simple installation.

2. Low power consumption design to save energy.

3. High reliability, can work normally in high temperature and high humidity environment.

4. Easy maintenance design, not easy to be blocked by fallen leaves.

5. Optical measurement, accurate measurement.

6. RS485 signal output, long communication distance, stable communication

Outdoor installation and debugging steps

The rain sensor needs to be installed in an open place, and there should be no obstructions around and above it. Install the device on the bracket in the accessories first, and fix the device and the bracket with 4 M4*35 304 stainless steel screws and nuts. Then install the bracket to the position to be installed (the position to be installed requires a φ5 round hole). The bracket should be installed horizontally, and the tray and equipment are fixed by three M4*10 304 stainless steel screws and nuts.

Precautions for the use of optical rain gauges

The rain gauge needs to be kept outdoors for a long time, and the use environment is quite harsh. Therefore, the surface of the instrument should be kept clean and often wiped with a soft cloth. The long-term operation of the instrument is generally one month To clean up once, it must be cleaned up every three months.

The successful application of the rain sensor legal person based on the photoelectric detection principle not only provides detection equipment for industries in need, but also provides a theoretical and technical basis for the development of optical rain sensor, which has important theoretical significance and application value. Has huge economic and social benefits.



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