An electronic switch system against electromagnetic interference
An anti-electromagnetic interference, electronic switch technology, applied in the direction of electronic switches, circuits, electrical components, etc., can solve the problem of low sensitivity, and achieve the effects of saving time, easy implementation, and simple structure
Active Publication Date: 2021-07-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
[0004] Purpose of the invention: In order to solve the problems of low sensitivity in the prior art, the present invention provides an electronic switch system for preventing electromagnetic interference;
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[0018] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention.
[0019] Such as Figure 1-2 As shown, the present embodiment provides an electronic switch system for preventing electromagnetic interference; the system includes an encoding circuit, a switch controller, a PWM drive module, a main controller, a first terminal J1, and a second terminal J2; the main controller adopts STM32F407 chip, which includes DSP, FPGA, RAM, FLASH, IO port and bus.
[0020] The encoding circuit includes first to fourth transistors and first to fourth resistors; the first and fourth transistors are NPN transistors, and the second and third transistors are PNP transistors.
[0021] The emitter of the first transistor Q1 is connected to one e...
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The invention provides an electronic switch system for preventing electromagnetic interference. The main controller regularly reads the level signal of the output end of the encoding circuit. When the laser in the off state needs to be turned on, the switch controller provides the level signal for the input end of the encoding circuit. , the encoding circuit encodes the level signal at the input terminal, and the encoded level signal is consistent with the turn-on level signal preset in the main control chip, then the main controller uses the PWM drive module to send a PWM drive signal to the laser to control The laser is turned on; when the working laser needs to be turned off, the switch controller provides a level signal to the input end of the encoding circuit, and the encoding circuit encodes the level signal at the input end, and the encoded level signal is the same as that preset in the master If the off-level signal in the control chip is consistent, the main controller uses the PWM drive module to send a PWM drive signal to the laser to control the laser to turn off. The invention improves the sensitivity of the equipment.
Description
technical field [0001] The invention belongs to the technical field of switch circuits, in particular to an electronic switch system for preventing electromagnetic interference. Background technique [0002] With the advancement of electronic technology and the popularization of computer technology and artificial intelligence, a large number of circuits are controlled by logic chips, the control voltage is getting lower and lower, the power consumption is getting smaller and smaller, and the logic scale is getting bigger and bigger. The requirements are getting higher and higher, and with the improvement of automation, more and more electrical products generate a lot of electromagnetic interference around us. At present, the control and emission switches of carbon dioxide lasers and radio frequency lasers used in medical laser surgery in China mostly use electronic switches. As long as the working power is connected and the set high or low level signal is input at the contro...
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IPC IPC(8): H03K17/60H03K17/14
CPCH03K17/14H03K17/60
Inventor 刘禹李佳欢王新华
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS