METHOD FOR DETERMINING THE METROLOGICAL CHARACTERISTICS OF MEASURING DEVICE FOR SPEED MEASURING IN TERMS OF VIDEO FRAMES Russian patent published in 2012 - IPC G01P21/00 G08G1/54 

FIELD: instrumentation.

SUBSTANCE: invention relates to the control and measurement tools and can be used to check the class for vehicles (V) speed measurers (SM) that using a video camera. By using the test device and SM under verification measured the repetition period of video frames showing the state sign plate (SSP) of the V. Then the values of the periods following motion pictures video frames that measured under verification SM research and under verification tool are compared, determine the relative error of measuring the repetition period of motion video frames. The relative error measurement have to be produced several times, from obtained values the selected a maximum. Then, a vehicle placed in the control video cameras, records the position of vehicle entry and exit from the zone that control by camera and their corresponding video frames with the image SSP plate at the top and bottom of the video frame. Then measured the movement of the V in the control zone by means of verification device, as well as using the SM under verification by means of the displacement of the plate SSP in the area of the video frame. Then the values of displacement, measured by SM under verification and verification device compared, defined the relative error in measuring the movement of the V in the control zone of the camera. The measurements of V displacement and of the relative error of measurement of V displacement are repeated, and selected the maximum. The relative error in V velocity measuring is defined as the sum of the maximum values of the relative measurement error of the repetition period of motion pictures and the relative error of the moving vehicle in the camera control zone.

EFFECT: checking the class for vehicles speed measurers.

1 dwg, 3 dwg