Engine plume characteristic signal testing device and method

The invention discloses an engine plume characteristic signal testing device and method. The device includes three working modes of radiation measurement, particle measurement and synchronous measurement, and particle parameters such as plume particle size, concentration, components and source identification and radiation parameters such as radiation temperature, radiance and radiation intensity are synchronously obtained, so as to evaluate an engine plume characteristic signal. The testing device comprises a laser light source part, a light receiving part, a photoelectric detection part and acharacteristic signal testing and processing part, and the laser light source part is located on one side of the plume of the engine and used for generating incident lasers with different wavelengths. The light receiving part is positioned on the other side of the plume of the engine and is used for filtering, converging and receiving radiation light or transmission laser. The photoelectric detection part is used for det