The invention discloses a method for detecting contact net geometrical parameters based on
infrared image processing. The method includes the following steps that firstly, an
infrared thermal imager is installed on the top of a running locomotive and connected with a mainframe for
processing and storing an
infrared image; secondly, the infrared thermal imager is used for shooting an
infrared image for a
pantograph, the
infrared image is used for making a
pantograph model and relevant parameters of the
pantograph model are measured; thirdly, wire height calibration is carried out on the
infrared image shot by the infrared thermal imager; fourthly, the infrared thermal imager is used for collecting the positions of the pantograph continuously and transmitting the positions of the pantograph to the mainframe to be processed, the pantograph
model matching calculation is carried out on the infrared image, the crossing point position between the current
contact line and the pantograph is calculated out, and therefore the stagger value and the wire height are calculated out. The stagger value is the distance between the
contact line and the center of the pantograph and the wire height is the
vertical distance between the face of the pantograph and the top of the locomotive. By means of the method for detecting the contact net geometrical parameters based on
infrared image processing, long-time stable working can be achieved, the anti-interference performance is achieved and in addition, cost can be reduced.