The invention discloses an apparatus capable of automatically monitoring exhaust emissions of vehicles on a real-time basis and an assessment method. The apparatus comprises a controller, an FPGA, a transmitting
system, a receiving
system, a PTZ driver, a camera, a
radar speed measuring
system, an RFID reader, a barometric pressure and temperature sensor, a 4G
wireless transmission module and a data compensation memory table, wherein the transmitting system comprises a
radio frequency driver, an acousto-optic tunable filter, an
infrared light source, and a collimation system, and the receiving system comprises a first photoelectric
detector, a
signal processor, and a second photoelectric
detector. The method improves the accuracy of
exhaust gas measurement by digitally compensating for the influence of barometric pressure, ambient temperature,
traffic speed, and inconsistency of the parameters of the first photoelectric
detector and the second photoelectric detector on the
exhaust gas measurement precision. The RFID technology is used to quickly identify traffic vehicles with
exhaust emission exceeding standard and report to the traffic control department on a real-time basis, thereby improving the law
enforcement efficiency of relevant departments.