The sun is a hot gas ball with a surface temperature of about 6000K. Although it seems that it has not changed, in fact, the sun has been continuously radiating energy in the form of electromagnetic waves. This part of the energy radiated by the sun to the earth brings a lot of light and heat to the earth.

Introduction of solar radiation sensor

Solar radiation is the heat source of the earth. It is roughly estimated that the heat energy transmitted by the sun to the earth per minute is about 25 billion calories. Therefore, without the sun, there will be no living environment of the earth, complex and changeable weather phenomena and thousands of different climate differences. At present, coal, oil, natural gas, wind energy, hydropower, bioenergy and other energy used by human society are related to solar radiation.

Huge solar radiation has an immeasurable impact on the earth and human beings. Therefore, solar radiation is listed as an important content of meteorological observation indicators. Its monitoring, recording and analysis will play an important role in human research on solar energy, meteorology, marine environment, agroecology, building materials and so on.

The energy emitted and transmitted by the sun is mainly concentrated in less than 4 μ M wavelength range, so it is used to measure solar radiation energy, and the wavelength range is 0.3 ~ 3 μ The sensor between M is called the total solar radiation sensor.

Renke total solar radiation sensor is a solar radiation observation device and implementation method based on photoelectric principle. It is composed of photosensitive elements and microprocessor. It has the characteristics of high speed, accurate monitoring and complete functions. The sensor has beautiful and compact appearance and small occupied space; It is powered by wide voltage DC10 ~ 30V, suitable for three wire or four wire wiring method, with simple wiring and convenient installation.

The total solar radiation sensor is equipped with high-precision photosensitive elements, with wide spectral absorption, high absorption within the full optical spectrum range and good stability; A dust cover with a transmittance of up to 95% is installed outside the sensing element. The cover body adopts special treatment, which can reduce dust adsorption, effectively prevent the interference of environmental factors on internal elements, and accurately measure the amount of solar radiation.

The photoelectric detection circuit monitors the total solar radiation, transmits the monitored signals to the signal conditioning circuit and the A / D conversion circuit for processing and conversion, and then transmits the converted digital signals to the microprocessor; The microprocessor analyzes and calculates the received digital signal, obtains the real-time observation data of total solar radiation, and outputs the data to the detection center.

In terms of output models and types, Renke total solar radiation sensor includes RS485 type and analog type. The difference between them is that RS485 sensor adopts standard modbus-rtu485 communication protocol, which can directly read the current solar radiation value; The analog type includes three signal outputs of 4-20mA, 0-5V and 0-10V, which can read and convert the current solar radiation value.

In order to ensure the accuracy of the total solar radiation monitoring data, it is necessary to install the total solar radiation sensor in the open area around and there is no shelter on the photosensitive surface: first, adjust the horizontal position of the mounting bracket to make it parallel to the ground; Fix the sensor firmly on the mounting bracket through the mounting hole with screws, and ensure that the sensor is parallel to the ground.

Human understanding and utilization of climate resources have existed since ancient times. The ancients knew for a long time to arrange agricultural production according to the change of climate characteristics. Now, with the development of science and technology, the concept of climate resources has more connotation and extension. Solar energy is clean, pollution-free, renewable, huge and widely distributed, while wind energy, hydropower and bioenergy are all formed by solar energy conversion.

In fact, the sun has been changing. We use the total solar radiation sensor to monitor the energy emitted and transmitted by the sun in real time, which is conducive to scientific research on agrometeorology, plant physiology, solar energy utilization, marine investigation, building material aging and air pollution.

Responsible editor: WV

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