A method for measuring the diameter of falling particles and a laser raindrop spectrometer
A raindrop spectrometer and diameter measurement technology, applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of limited improvement of measurement errors and low measurement accuracy, so as to reduce the influence of measurement errors, adapt quickly, and improve measurement accuracy. degree of effect
Active Publication Date: 2020-01-03
BEIJING METABTAR RADAR
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However, this method has limited improvement on the measurement error, and the measurement accuracy is low
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[0050] Existing laser raindrop spectrometer (also known as precipitation phenomenology), usually adopts such as figure 1The structure shown is used to measure the size of falling particles such as raindrops, snowflakes or hailstones. Wherein, the laser raindrop spectrometer includes a laser emitting end 101 and a laser receiving end 102 , and the laser emitting end 101 and the laser receiving end 102 are separated by a preset distance. Theoretically, during the working process of the laser raindrop spectrometer, the laser emitting end 101 will emit a beam of parallel lasers with a fixed width and thickness and a linear distribution of laser intensity. For example, the laser emitting end 101 will emit a beam of laser light to the laser receiving end 102. A parallel laser beam with a width of 30 mm and a thickness of 1 mm, and the beam of laser light will be received by the laser receiving end 102 , thereby forming a measurement area between the laser emitting end 101 and the la...
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The invention provides a falling particle diameter measuring method and a laser raindrop spectrograph. The falling particle diameter measuring method comprises the following steps of: when the laser raindrop spectrograph measures the diameter of a falling particle, detecting the laser strength of received parallel lasers by a laser receiving end; when the parallel lasers are not blocked by fallingparticles, setting N according to a transmissivity of the current environment, calculating reference laser strength according to the detected N laser strength sampling values of parallel lasers, andcalculating the diameter of the falling particle according to the reference laser strength. As proved by the falling particle diameter measuring method, when the diameter of the falling particle is calculated, the reference laser strength can be dynamically calculated according to the N laser strength sampling value, the N is set according to the transmissivity of the current environment, namely,the reference laser strength is adjusted properly according to the environment factor, and influence of environment interference on the measuring error is lowered, and the measurement accuracy is increased.
Description
technical field [0001] The invention relates to the field of optical equipment, in particular to a method for measuring the diameter of falling particles and a laser raindrop spectrometer. Background technique [0002] Laser raindrop spectrometer (also known as precipitation phenomenometer) is used to measure the diameter of falling particles such as raindrops, snowflakes or hail using laser technology, and the diameter of falling particles is of great significance to the calculation of parameters such as precipitation. [0003] A common laser raindrop spectrometer includes a laser emitting end and a laser receiving end, and uses the sudden change in laser intensity to measure the diameter of falling particles. The specific measurement process includes: the laser emitting end emits parallel lasers, and the laser emitting end and the laser receiving end A measurement area is formed between the ends. When the falling particles pass through the measurement area, the parallel la...
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IPC IPC(8): G01B11/10G01W1/14
CPCG01B11/10G01W1/14
Inventor 张垚刘强李佳
Owner BEIJING METABTAR RADAR