Measuring method and measuring device of non-contact electrostatic spraying charge-to-mass ratios

Abstract

The invention discloses a measuring method and a measuring device of non-contact electrostatic spraying charge-to-mass ratios, and the measuring method and the measuring device are particularly suitable for calculation of charge-to-mass ratios of charged fogdrops in induction charging and corona charging. The measuring device comprises a laser transmitter (1), an electrostatic sprayer (4), a polarizer (2), a reflector (3), a reflector (3'), a magneto-optical element (6), an analyzer (7), a composite polarized light prism (8), an optical-electrical converter (9), a differential amplifier (10), wires (11) and an oscilloscope (12), wherein the light emitted by the generating laser (1) is a sheet light source. The diameter of the magneto-optical element is D, the distance between the electrostatic sprayer (4) and the magneto-optical element (6) is H, the mist spraying angle of the electrostatic sprayer is theta, and D, H and theta meet the relation that D=2H*tan(theta/2). Current values of all fogdrops on a charged fogdrop group section can be calculated without contact by the utilization of the Faraday magneto-optical effect and the Ampere circuital theorem through the measuring device, then the current values are divided by mass flow rates of a charged foglet group, and the charge-to-mass ratios can be calculated.

Description

technical field [0001] The invention relates to a method and a device for measuring the charge-to-mass ratio of an electrostatic spray, in particular to a method and a device for measuring the charge-to-mass ratio of an electrostatic spray, and belongs to the technical field of plant protection machinery. Background technique [0002] At present, researchers at home and abroad basically use three measurement methods: simulated target method, Faraday cage method and mesh target method. In 1984, Law and Lane used smooth spheres and spikes to simulate plants, and used coaxial cables to measure the charge; in 2008, Jiangsu University used the mesh target method and picoammeter to measure the charge of charged droplets; in 1991, Dante and Gupta Utilize the Faraday cup method and picoammeter to measure the amount of charge of the charged droplets; the application number is 201110156068.5, and the patent titled "A Real-time Measurement System for the Charge-to-Mass Ratio of Wind-sa...

AI Technical Summary

Problems solved by technology

Using the above three methods to measure the charge-to-mass ratio makes the measurement results inaccurate

Using a non-contact method to measure the charge-to-mass ratio of charged droplets has the advantages of accurate and simple measurement, but there is no relevant report on this method to measure the charge-to-mass ratio of charged droplets

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