BS3-PLC 用于PLC的压力测试模块

6.2.3.- 用PLC进行仪表控制
PRESSURE TEST MODULE FOR PLC - BS3-PLC

創新系統

The "BS3-PLC" has been designed to study the pressure measurement techniques and control application with a PLC.

查看一般說明

一般說明

The "BS3-PLC" has been designed to study the pressure measurement techniques and control application with a PLC. This unit is equipped with a pressure chamber with several sensors, with different uses and applications, adjusted to measure the pressure changes inside the chamber and control the pressure with a PLC. One of the pressure sensor output signals is conditioned to be connected to the PLC. The unit works with a compressor and a manometer connected next to a regulating valve that can adjust the maximum pressure inside the chamber. On both sides of the pressure chamber there are two diaphragms where displacement sensors are connected to measure the pressure valve. The pressure inside the chamber can be controlled by a PLC, controlling the air supply depending on the pressure values obtained from a sensor.

* Available PLC models of different manufacturers: PANASONIC, SIEMENS, OMRON, MITSUBISHI, ALLEN BRADLEY, etc.

練習和指導練習

手册中包含的指导实践练习

  1. Use of linear positioning sensor (potentiometer) to detect the displacement produced by a diaphragm expansion caused by the air pressure.
  2. Use of a LVDT as an element to measure the diaphragm distortion that is consequence of the pressure inside the pressure chamber.
  3. Differential pressure sensor with hole-board system. Use of a differential pressure sensor of the semiconductor type to measure the pressure fall in a hole-board system.
  4. Strain gauges. To detect objects using an infrared sensor by light beam interruption.
  5. Measure the pressure in the chamber, using two different types of sensors (manometric and absolute pressure sensor).
  6. Strain gauges for measuring deformations: their heating element changes as the diaphragm expands due to the pressure coming from the pressure chamber.
  7. Using the analog inputs and outputs of the PLC to read and write analog signals.
  8. Read the pressure sensor signal with the PLC.
  9. Manual control of the actuator through the PLC.
  10. PID control of the pressure value through the PLC.
  11. Observe the effects of the pressure control to changes in the PID parameters.

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