A liquid injection system and its control liquid injection method based on fpga control diaphragm pump
A diaphragm pump and liquid injection technology, which is applied in the direction of pump control, pump, liquid variable capacity machinery, etc., can solve the problems of increasing the cost of instruments and achieve the effect of reducing costs
Active Publication Date: 2022-06-24
ZHONGSHAN CHUANGYI BIOCHEM ENG
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Problems solved by technology
There are many actual types that need to be injected in the blood test category, and the use of plunger pumps will greatly increase the cost of the instrument
Method used
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[0020] The present application will be described in further detail below with reference to the examples.
[0021] In order to open and close the diaphragm pump and the corresponding solenoid valve, to achieve the purpose of high-precision liquid injection to achieve the ideal liquid injection speed. The present application discloses a liquid injection system for FPGA-controlled diaphragm pump, including a host computer for sending an instruction to open one channel of liquid injection, an FPGA control module electromechanically connected to the host computer for receiving instructions from the host computer, and an FPGA The solenoid valve switch and diaphragm pump controlled by the control module, at the same time, the FPGA control module generates the PWM pulse of this channel, and the PWM pulse will be reflected on the IO pin of the FPGA. The high and low level changes of the triode open and close the triode, the emitter of the triode is connected to the grounding resistance...
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The invention discloses an FPGA-based liquid injection system for controlling a diaphragm pump and a method for controlling liquid injection. It includes a host computer used to send an instruction to open one of the liquid injection channels, and an FPGA control module that is electrically connected to the host computer to receive instructions from the host computer. , and the solenoid valve switch and diaphragm pump controlled by the FPGA control module, and the PWM pulse generated by the FPGA control module will be reflected on the IO pin of the FPGA control module, and the IO pin is connected to the base of the triode according to the IO The high and low level changes of the pin control the triode to turn on and off, the emitter of the triode is connected to the grounding resistor, and the control signal of the NMOS tube is drawn between the emitter of the triode and the grounding resistor to control the speed of the diaphragm pump. Because the FPGA is used to generate PWM pulses to control the speed of the DC motor on the diaphragm pump when receiving commands, so as to achieve the ideal liquid injection speed. FPGA simultaneously opens and closes the diaphragm pump and the corresponding solenoid valve, which has achieved the purpose of high-precision liquid injection.
Description
technical field [0001] The invention belongs to the field of medical inspection equipment, and relates to a liquid injection system for controlling a diaphragm pump based on an FPGA and a liquid injection control method thereof. Background technique [0002] Pump is a machine used to transport fluid or pressurize fluid. Syringe pump and plunger pump are generally used for injection. Syringe pump is composed of motor and its driver, sampler, screw and bracket. It has a reciprocating screw and nut, mainly through the movement of the screw, to push the injector to move at a constant speed, and slowly inject the liquid in the injector to the desired position. The plunger pump is divided into two representative structural forms: the axial plunger pump and the radial plunger pump. The plunger pump is composed of the electrical part, the power end, the hydraulic end and the transmission part. It uses the plunger in the pump cylinder body. The internal reciprocating movement makes ...
Claims
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IPC IPC(8): F04B43/00F04B43/04F04B49/20
CPCF04B43/0081F04B43/04F04B49/20
Inventor 牛勇涛陈禾如
Owner ZHONGSHAN CHUANGYI BIOCHEM ENG