Introduction of the System Components of Laboratory Syringe Pumps

Laboratory syringe pumps are common in life science research for a long time for uniform microinjection instruments. The proper use of microinjection pumps in experiments can greatly reduce the labor intensity of staff, while accurately controlling the amount of various reagents used.

Ⅰ. Understanding the Laboratory Syringe Pump

The laboratory syringe pump is a high precision syringe pump that supports multiple working modes, with a high-resolution color touch screen LCD for easy and quick parameter setting, multiple indicators to clearly confirm its working status, and supports multiple syringe options to adapt to the requirements of different experimental flows, high precision control, and a protection mechanism and alarm mechanism. It supports five working modes such as injection and extraction. It has built-in RS-485 communication, all-metal (stainless steel) housing, wide range of power input and adapted to various occasions. In addition, it supports Modbus protocol.

Ⅱ. System Components of Laboratory Syringe Pump

The laboratory syringe pump consists of a control system, input system, output system, syringe stepper motor, status detection system, syringe, power supply, alarm system and other components.

1. The main control module of the laboratory syringe pump uses a microcontroller to realize the control of the whole system, including work control, parameter calculation, keyboard input, status display, pressure detection, automatic labeling, automatic alarm, etc.

2. The power supply circuit of the laboratory syringe pump consists of power supply selection, charging part and voltage boosting part. The power supply circuit provides the working power supply for the components and can automatically switch between the internal and external power supply, and automatically charge the internal power supply when using an external power supply. After charging is completed, the charging line is automatically disconnected. If the external power fails, the internal power supply can automatically supply power.

3. The stepper motor connection module of the laboratory syringe pump requires the motor control system to achieve high torque, low vibration level, low noise, fast response and efficient drive.

4. The mechanical drive principle of the laboratory syringe pump. After getting the command from the central circuit, the stepper motor drive circuit will get the loading voltage and drive the stepper motor by a certain pulse excitation. The stepper motor will do the rotation under a certain regular pulse frequency, and then the power source will be driven to the secondary gearbox for deceleration so that the output speed will be further refined and transmitted to the screw, the screw will form an external rolling spiral with the half-nut structure so as to accurately transmit the speed to the baffle. The screw is formed with the half-nut structure to form an external rolling spiral, thus accurately transmitting the speed to the stopper, providing a stable and accurate feed motion.

Pressure detection system: A sensor is a device that can feel or respond to the measured physical quantity and convert it into a usable signal output according to a certain law, which can convert the input variable into a detectable electrical signal and send various parameters into the computer system for intelligent monitoring and control, and it is a front part in the laboratory syringe pump.