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Spectral type solar radiance measuring instrument

A technology for measuring solar radiation and illuminance, which is applied in spectrum investigation and other directions, and can solve problems such as large measurement error, large volume, and slow measurement speed

Inactive Publication Date: 2013-07-17
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, thermoelectric conversion elements commonly used in thermoelectric pyranometers are thermocouples, etc. The disadvantages are that the sensitivity changes with the use time, the response speed is slow, and there is no wavelength resolution function.
Photoelectric sensors commonly used in photoelectric pyranometers include photodiodes, phototransistors, silicon solar cells, photovoltaic sensors, and photomultiplier tubes. Does not match, measurement error is large
The disadvantage is that when PMT is used, a mechanical scanning mechanism is also required to obtain wavelength information, and the measurement speed is slow; when the ultraviolet spectrum signal is transmitted to the room with an optical fiber bundle, a very long optical fiber is required, which causes serious loss of ultraviolet light signal, and the optical fiber There are also potential safety hazards in long-distance laying, and special protective measures are required
In the instrument disclosed in patent CN101943603A (a solar energy spectroradiometer based on a charge-coupled device), although a CCD detector is used, its optical coupling system is realized by traditional optical components, which has the disadvantages of large volume, complicated assembly process, and consistent Difficulties such as difficulty in guaranteeing sex
The instrument uses a shading tube to limit the angle of incident light, and the measured wavelength band is limited to the ultraviolet region
And there is no shutter for protection in the optical part, there are potential safety hazards during use
[0007] The above-mentioned relevant patents only involve part of the technology of the present invention, but none of the patents or literature reports fully consistent with or similar to the technical characteristics of the present invention

Method used

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  • Spectral type solar radiance measuring instrument
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  • Spectral type solar radiance measuring instrument

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Embodiment 1

[0059] Embodiment 1 The specific implementation of the instrument of the present invention will be described below with reference to the accompanying drawings.

[0060] Based on the spectrum type solar irradiance measuring instrument of the present invention, its principle block diagram is as figure 1 shown. The instrument of the present invention adopts optical dispersion method, and based on spectral measurement, array detector and ARM microprocessor as the core technology, it constitutes a spectral solar radiation illuminance measuring instrument.

[0061] The instrument includes: optical receiving unit, optical coupling unit, fiber optic spectrometer module unit, GPS module unit, constant temperature control unit and housing and other units. The optical receiving unit is located on the top of the housing to receive and process the light radiation signal from the sun; the optical coupling unit connects the output interface of the optical receiving unit and the input interf...

Embodiment 2

[0078] Embodiment 2 illustrates the working principle of the spectral solar irradiance measuring instrument of the present invention.

[0079] Working principle and working process of the present invention comprise:

[0080] Step 1: Start the instrument, and the instrument will automatically initialize. Use the built-in GPS module unit to determine the local time;

[0081] Step 2: If the time is within the range of local sunrise to sunset, the instrument starts the constant temperature control unit. When the temperature tends to be stable, set the integration time of the array detector to the minimum value, open the shutter of the optical system, and the light radiation of all wavelengths emitted from the sun at a certain moment enters the diffuse transmission plate through the double protective cover, and passes through the diffuse transmission plate The uniform mixing of the incident light eliminates the directional error (that is, the cosine effect);

[0082] Step 3: The...

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Abstract

The invention relates to a spectral type solar radiance measuring instrument and belongs to the technical field of irradiance measurement and information processing. The measuring instrument is composed of an optical receiving unit, an optical coupling unit, a fiber optical spectrometer module unit, a global positioning system (GPS) module unit, a thermostatic control unit, a case and the like. According to the measuring instrument, key technologies such as solar radiation collection by a lens, fiber optic bundle transmission, grating light splitting and an array detector are adopted to measure solar radiance in ultraviolet, visible, near-infrared and infrared wave bands, and wired or wireless transmission of observation data is achieved through data interfaces. As a high-resolution solar irradiation observation instrument provided with a wavelength resolution function, the measuring instrument can obtain a two-dimensional spectrogram about irradiance-wavelength as well as a three-dimensional spectrogram about irradiance-wavelength-time at a certain moment, the data information quantity is rich, and broad application prospects in fields of meteorological observation, solar energy resource assessment, air pollution detection, modern agriculture and ecological security research and the like are provided.

Description

technical field [0001] The invention relates to the technical field of illuminance measurement technology and information processing, in particular to a solar spectral irradiance measuring instrument, which can be used to measure solar spectral irradiance in four bands of ultraviolet, visible, near-infrared and infrared. Background technique [0002] Solar radiation is the most important source of energy for the earth and the driving force behind changes in the atmosphere and oceans. In recent years, scientists have found increasing evidence that changes in solar radiation cycles are linked to changes in Earth's climate. Small changes in the sun's illuminance can have a huge impact on our planet's climate. To study the relationship between solar radiation and global climate change requires long-term and accurate solar radiation observation data, so the observation of solar irradiance is obviously of great significance. [0003] On the other hand, with the gradual shortage ...

Claims

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Application Information

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IPC IPC(8): G01J3/30
Inventor 曹彦波吕文华于爱民费强宋大千陈保卫曹博成
Owner JILIN UNIV
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