Device and method for generating mist droplets

Abstract

A device and method for generating fog droplets, comprising: a transmitting end, a reflecting end, an imaging device, a light-emitting backboard, and an ultrasonic signal generator; the transmitting end is connected to the ultrasonic signal generator, and emits ultrasonic waves vertically downward; the reflecting end is perpendicular to the emitting end The opposite setting is used to reflect the ultrasonic wave emitted from the transmitting end, and the space between the transmitting end and the reflecting end forms a droplet suspension area; the imaging device is set on the horizontal side of the droplet suspension area to perform real-time imaging of the droplet; the luminous backboard It is arranged horizontally opposite to the imaging device to provide imaging illumination; an auxiliary evaporation system is also provided on one side of the droplet suspension area to accelerate the evaporation of the droplets. The invention adopts the containerless evaporation method, after ultrasonically suspending the relatively large mist injected by the traditional syringe, monitors the particle diameter by the image processing method and reduces the particle diameter by the accelerated evaporation method, and obtains the mist droplet with the specified particle diameter.

Description

technical field [0001] The invention belongs to the technical field of agricultural plant protection, and in particular relates to a fog drop generating device and method. Background technique [0002] Chemical control is the main means of crop pest control, but the large-scale use of pesticides not only causes phytotoxicity to crops, but also causes serious harm to the environment. Therefore, efficient application reduction is the development direction of agricultural plant protection technology. The drift and deposition process of pesticide droplets is the research focus of efficient application reduction, and the randomness of droplet size has a great impact on the repeatability of experimental research. It is difficult to summarize scientific laws. [0003] The droplet size of the plant protection spray is mostly below 300 μm, and the aviation spray is even below 100 μm. The traditional spraying device has a large spray volume at one time, a large number of droplets, an...

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Problems solved by technology

Problems in this method: the separation of water from the solid surface is mainly affected by surface tension, gravity and the drag force of the surrounding air flow. The surface tension is greatly affected by the material, roughness and temperature of the solid, and the particle size is generally larger during separation. , it is difficult to meet the test requirements, and the particle size also has a certain randomness

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