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Multi-parameter detecting method and apparatus for liquid drop

A detection method and multi-parameter technology, applied in measurement devices, instruments, meteorology, etc., can solve the problems of affecting measurement accuracy, bulky instruments, and low measurement accuracy.

Inactive Publication Date: 2008-11-12
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a mechanical anti-bucket rain gauge, which uses the measurement of the number of mechanical reversals of the droplet measuring bucket, so it has the disadvantages of complex mechanism and large instrument; The measurement method uses the siphon to release the liquid level to restore the measurement zero point, so there are disadvantages of poor zero repeatability and low measurement accuracy; there is also a photoelectric drop meter, which uses a position switch to count the number of droplets, so There is a problem that the droplet size change will affect the measurement accuracy
The existing droplet detection methods generally only detect the volume parameters of the droplet, and the accuracy and reliability are not high.

Method used

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  • Multi-parameter detecting method and apparatus for liquid drop
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  • Multi-parameter detecting method and apparatus for liquid drop

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Embodiment Construction

[0025] A preferred embodiment of the present invention is as follows: see figure 1 , for the ready-made vertically falling droplet 2 such as the small hole funnel 1, the detection work steps of each droplet 2 in this method are as follows:

[0026] a. Droplet 2 falls vertically at T 0 When time passes by the first position photoelectric sensor 3, the first position photoelectric sensor 3 sends a signal T 0 To the signal processing unit 6, the signal processing unit 6 internally starts timing and the output value S of the capacitance sensor and the converter 4 c perform integral calculations;

[0027] b. When the droplet 2 falls on T 1 When time passes by the second position photoelectric sensor 5, the second position photoelectric sensor 5 sends a signal T 1 To the signal processing unit 6, the signal processing unit 6 ends the integral calculation, and obtains the signal T 0 with signal T 1 The time difference T and the first integral value ∑ 1 , T and ∑ 1 Each is tak...

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Abstract

A method for detecting multiparameter of liquid drop includes falling liquid drop vertically to pass the first transducer, capacity sensing and converter (CSAC) as well as the second transducer in sequence; carrying out integration calculation for output value Sc of CSAC starting from signal processing unit, calculating out speed value of liquid drop passing the first transducer and position value of break point at time of liquid drop being ready-made by using data T and erection distance L between the two transducers.

Description

technical field [0001] The invention relates to a multi-parameter detection method and device for liquid droplets. Background technique [0002] Existing droplet detection methods are mainly droplet volume measurements, such as rain gauges. There is a mechanical anti-bucket rain gauge, which uses the measurement of the number of mechanical reversals of the droplet measuring bucket, so it has the disadvantages of complex mechanism and large instrument; The measurement method uses the siphon to release the liquid level to restore the measurement zero point, so there are disadvantages of poor zero repeatability and low measurement accuracy; there is also a photoelectric drop meter, which uses a position switch to count the number of droplets, so There is a problem that the droplet size variation will affect the measurement accuracy. The existing droplet detection methods generally can only detect the volume parameter of the droplet, and the accuracy and reliability are not hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01W1/14G01D21/02G01N27/22
Inventor 李斌沈天飞李霞
Owner SHANGHAI UNIV