Liquid drop measuring method and device

A measurement method, droplet technology, applied in the direction of measuring device, liquid/fluid solid measurement, measurement flow/mass flow, etc., can solve the problems of large instrument, low measurement accuracy, poor zero repeatability, etc., and achieve fast measurement dynamic speed, The effect of high measurement accuracy

Inactive Publication Date: 2004-12-29
SHANGHAI UNIV
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Problems solved by technology

[0002] There are three main methods for measuring liquid droplets. One is the mechanical inverted bucket rain gauge, which uses the measurement of the number of mechanical reversals of the liquid drop bucket, so there are disadvantages such as complex mechanism and large instrument; the other is the siphon rain gauge. It adopts the method of measuring the change of the accumulated liquid level float of the droplets and releases the liquid level by siphon to restore the measurement zero point, so there are shortcomings of poor repeatability of the zero point and low measurement accuracy; the third is the photoelectric drop meter, which uses a photoelectric switch The method of counting the number of droplets, so there is a problem that the change of droplet size will affect the measurement accuracy

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Embodiment Construction

[0019] A preferred embodiment of the present invention is as follows: see figure 1 , the measurement work steps of this droplet measuring method are as follows:

[0020] a. Droplet 1 falls vertically, and when passing through the first photoelectric position sensor 2, the photoelectric position sensor 2 sends a signal s1 to the microprocessor 7, and the microprocessor 7 starts timing and controls the frequency pulse counter 6 to start to adjust the frequency f count;

[0021] b. When the droplet 1 falls through the second photoelectric position sensor 3, the photoelectric position sensor 3 sends a signal s2 to the microprocessor 7, and the internal timing of the microprocessor 7 is stopped, and the timing value T1 is obtained, and the microprocessor 7 simultaneously 7. Control the frequency pulse counter 6 to stop counting the frequency f, and obtain the corresponding count value N1;

[0022] c. Microprocessor 7 according to the physics fall formula, data T1, the distance L1...

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Abstract

The present invention relates to one kind of liquid drop measuring method and device. The measurement method includes adopting two vertically superposed position sensors and one capacitive sensor to measure the time for the liquid drop to pass through, adopting a frequency counter to count frequency and adopting microprocessor to calculate the liquid drop volume. The device includes two photoelectronic sensors, one capacitive sensor, one capacitance/frequency converter, one frequency pulse counter and one microprocessor. The present invention can measure the volume of each falling liquid drop directly with high precision and fast dynamic speed.

Description

technical field [0001] The invention relates to a liquid drop measurement method and device. Background technique [0002] There are three main methods for measuring liquid droplets. One is the mechanical inverted bucket rain gauge, which uses the measurement of the number of mechanical reversals of the liquid drop bucket, so there are disadvantages such as complex mechanism and large instrument; the other is the siphon rain gauge. It adopts the method of measuring the change of the accumulated liquid level float of the droplets and releases the liquid level by siphon to restore the measurement zero point, so there are shortcomings of poor repeatability of the zero point and low measurement accuracy; the third is the photoelectric drop meter, which uses a photoelectric switch The method of counting the number of droplets, therefore, there is a problem that the change of droplet size will affect the measurement accuracy. Contents of the invention [0003] The object of the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F3/00
Inventor 李斌沈天飞张涛
Owner SHANGHAI UNIV
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