Vehicle exhaust gas monitoring system based on RFID (radio frequency identification devices)

The invention provides a vehicle exhaust gas monitoring system based on an RFID (radio frequency identification devices), which relates to the technical field of wireless sensing. The vehicle exhaustgas monitoring system comprises an exhaust gas detection unit, an active RFID tag and a RFID card reader. The exhaust gas detection unit is arranged at an exhaust gas emission pipe orifice of a vehicle and detects the exhaust gas information of the vehicle in real time. The active RFID tag is electrically connected with the exhaust gas detection unit and acquires the exhaust gas information acquired by the exhaust gas detection unit, and comprises a RFID tag body, a solar panel and a lithium battery, the solar panel converts the solar energy to electric energy to directly supply power to the RFID tag body and can also supply power to the lithium battery first. The RFID card reader is arranged at a traffic light crossing of a road and automatically reads the tag information of all active RFID tags within the identification distance range of the RFID card reader. The exhaust gas information of the vehicle can be acquired in real time without examining the vehicle by driving the vehicle to a vehicle administration office, so that a great amount of time of a car owner can be saved.