Laser raindrop spectrograph

A raindrop spectrometer and laser technology are applied in the field of obtaining raindrop spectra, which can solve the problems of high labor intensity, heavy workload, and inability to automatically complete measurement and classification, and achieve the effects of simple sampling operation, improved reliability and stability

Inactive Publication Date: 2010-10-20
ANHUI UNIV OF SCI & TECH
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Problems solved by technology

The traditional measurement method has a large workload and high labor intensity, and cannot automatically comple

Method used

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  • Laser raindrop spectrograph
  • Laser raindrop spectrograph
  • Laser raindrop spectrograph

Examples

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Embodiment Construction

[0021] see figure 1 , the raindrop spectrometer in this embodiment is composed of a laser beam generating device, a data acquisition and processing unit, a communication system, and a raindrop spectrum parameter analysis and calculation unit.

[0022] The laser beam generating device generates a group of parallel beams by the laser beam source, and adopts non-visible infrared light with a wavelength of 785nm. A photocoupler receiver CCD with a lens is placed at the receiving end to measure the light intensity by converting the light signal into an electrical signal.

[0023] When a raindrop particle passes through the beam, the received signal strength in some areas decreases, the diameter of the particle is calculated by the number of pixels that decrease in magnitude, and the falling speed of the raindrop particle is determined by the duration of the reduced signal. A heating module can be set in the detection area to prevent ice, steam or other interference; under the cont...

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Abstract

The invention discloses a laser raindrop spectrograph capable of continuously and automatically observing, which is characterized in that laser array arranging method is utilized to continuously detect the size, the number and the speed of raindrops, and raindrop spectrum parameters of rainfall, rain intensity and the like are computed according to measured raindrop particle information. A control system comprising DSP (Digital Signal Processor) and a field programmable gate array FPGA is arranged, wherein the FPGA is responsible for completing the data acquisition of each pixel in a CCD (Charge Coupled Device) laser array, and parallel computing ability of the FPGA is shown and an image edge detection arithmetic is utilized to compute the size, the number and the speed of the raindrops; and the DSP analyzes and computes the raindrop spectrum parameters according to the information of the size, the number and the speed of the raindrops and uploads the raindrop spectrum parameters to an upper machine at definite time through a CAN (controller area network) bus.

Description

technical field [0001] The present invention relates to the technical field of meteorological information, more specifically to a method and device for obtaining raindrop spectrum, which is used for the measurement and detection of different types of rainfall, including drizzle, heavy rain, hail, snowflakes and various precipitation in between. Background technique [0002] Raindrops are the end product of the cloud formation process. The study of raindrop spectrum is very valuable for the study of cloud development process, the physical process of precipitation formation, and the mechanism of precipitation formation. The radar quantitative measurement of precipitation and effect inspection are also of great significance. [0003] The traditional raindrop spectral data acquisition mainly adopts dynamic method, filter paper stain method, photography method, radar observation method and so on. Generally can be divided into direct method and indirect method. The direct meth...

Claims

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Application Information

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IPC IPC(8): G01W1/14
CPCY02A90/10
Inventor 黄友锐曲立国唐超礼凌六一邢立坤
Owner ANHUI UNIV OF SCI & TECH
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