Central Broadcasting Station

Central Broadcasting Station

Main Functions and Design Scheme of the Laboratory Bench Control System:
1. Utilizing a closed-loop control system, information from the system operation is collected via sensors and other acquisition systems. The collected data is then input into the computer via a data acquisition card, where it is displayed and calculated according to control requirements. Subsequently, control signals are output, processed by the data acquisition card into signals recognizable by the actuator, and finally, system control is achieved through the actuator's movement.
2. Our system employs a centralized computer control system, utilizing PLC as the hardware and the WINDOWS system as the software platform. During the signal collection process, we gather both digital and analog signals. Consequently, we must first convert the collected analog signals into digital signals that the PLC can process. After processing by the PLC, some of the output signals are then converted back into analog signals to control the laboratory bench. This necessitates both A/D and D/A conversions. Therefore, we use a data acquisition card integrated with these two functions to accomplish both A/D and D/A conversions.