Motor vehicle exhaust discharges and detects serial port communication monitoring devices

The utility model discloses a motor vehicle exhaust discharges and detects serial port communication monitoring devices, including tail gas detection equipment, host computer server and connection tail gas detection equipment and host computer server serial ports data line, it sets up the PLC singlechip to establish ties on the serial ports data line, and this PLC singlechip is equipped with the USB interface, is connected with monitoring facilities through the USB interface, after adopting above -mentioned scheme, not carrying on under the circumstances of any change the software and hardware that has detecting system now, intercept the communication between serial port equipment in step, record crude communication content truly to in giving distal end computer or database with here data synchronous transmission, improve and improve and use and the ability to supervise of the unit of supervision.