Shoulder-type adjustable automatic dusting tool with PWM (pulse-width modulation) technology

Abstract

The invention relates to an automatic medicine dusting tool, in particular to a shoulder-type adjustable automatic powder dusting tool with the PWM (pulse-width modulation) technology. The shoulder-type adjustable automatic powder dusting tool with the PWM technology comprises a support body, a control rod, a potentiometer regulation knob, a suite, a suite clamping piece, an O-shaped ring, a graticule, a telescopic rod, a prolonge and a lantern ring, wherein the telescopic rod is inserted into the control rod; the length of the telescopic rod can be regulated by rotating a telescopic rod clamping knob; the prolonge is tied on the suite by the lantern ring; and the position of the suite can be regulated by a suite clamping knob. In the work, the prolonge can be carried on the shoulder of a person, and the duty cycle of a PWM device is changed by regulating the potentiometer regulation knob to regulate the revolving speed of a motor so as to regulate the dusting amount. The shoulder-type adjustable automatic powder dusting tool has the advantages of simple structure, low cost, small noise, long service life, low energy consumption and wide practicality. Meanwhile, more medicine powder can be loaded, and dusting can be carried out in a wider range. The prolonge is used to avoid human body fatigue caused by the fact that a dusting device is independently held by an arm.

Description

technical field [0001] The invention belongs to the field of dusting equipment and tools, and in particular relates to a shoulder-type adjustable automatic dusting tool with PWM technology. Background technique [0002] The traditional speed control system mainly has the following defects: the analog circuit is easy to drift with time, will generate some unnecessary heat loss, and is sensitive to noise. At this time, the method of controlling the speed of the DC motor by means of PWM came into being. Pulse Width Modulation (PWM) is the abbreviation of "Pulse Width Modulation" in English, referred to as Pulse Width Modulation. And off, and change the length of on and off time in a cycle according to the needs, and change the average voltage by changing the duty cycle of the voltage on the armature of the DC motor, so as to control the speed of the motor. Therefore, this device is also called a switch drive device. [0003] After using the PWM technology, the defects of the...

AI Technical Summary

Problems solved by technology

[0002] The traditional speed control system mainly has the following defects: the analog circuit is easy to drift with time, will generate some unnecessary heat loss, and is sensitive to noise, etc.

First, the duster is small in size and the amount of powder charged is insufficient, resulting in the need for frequent powdering; second, the length of the duster is short, and it cannot meet the requirements for powder dusting at a long distance.

Third, the powder sprinkler has a lot of weight after it is charged. Simply relying on the strength of the human arm to sprinkle powder in the air can easily cause fatigue and cause arm pain

Fourth, the screen frame of the vibrating screen is a thin-walled part, and the noise is relatively large when vibrating

Fifth, the duster can control the amount of powder by changing the motor speed by adjusting the resistance, but the resistance is prone to heat, which affects the service life of the product

Sixth, most of the energy is wasted by resistance heating during the dusting process, so that the battery power is sometimes difficult to meet the requirements of long-term dusting

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