Pressure Measurement and CAN Bus Implementation for Data Transmission

The paper presents a method of real time measurement and transmission of pressure condition in industrial machine. In model system two PIC controllers are employed as two different nodes, first node measures the physical parameter, then transmits digital packets on CAN bus and another node receives. Sensor basically measures pressure in the analog domain and PIC controller built-in 10 bit ADC converts the analog data from sensor into digital number. This is processed and encoded by the same controller and sent the digital code to another PIC controller through a coaxial cable. The receiving controller can be used for analysis, display and or control purpose. Transmission and reception of data is performed by a pair of CAN transceivers. PIC controller supports CAN transceiver. The data transmission and reception is studied in different noise levels. The results show that the data transmission remains reliable due to CAN bus even in the presence of noise. The research intends to develop a data transmission system in the textile industries.