Intelligent Pressure Transmitter Based on CAN Bus

On the basis of the traditional pressure transmitter,an intelligent pressure transmitter was presented based on CAN bus and low power core controller MSP430F157.The tiny voltage signal output of the silicon piezoresistive pressure sensor was adjusted and then went into the MSP430F157 internal 12 bit A/D converter.The CAN bus interface module,composed of the CAN bus controller MCP2510 and CAN bus transceiver MCP2551,communicates with the microprocessor through the SPI bus.The test for pressure measurement and CAN bus communication shows that this intelligent pressure transmitter has characteristics of high measurement accuracy,stable and reliable communication function and decent flexibility.The technology and methods adopted in the system are of certain practical value.