Precision Measurement Of Dynamic Simulation Of The Target's Spatial Position

The equipment of photoelectric tracking and measurement has been developed for more than 50 years. Testing system in this field has been established. Most technical indexes of process inspection and final inspection of the photoelectric tracking and measurement equipment have been realized. The photoelectric tracking and measurement equipment is mainly used for dynamic application, so the optical dynamic target which provides a dynamic simulation target has been developed. The optical dynamic target is a kind of indoor measuring device which is used for testing photoelectric tracking and measurement equipment dynamic performance.The dynamic tracking accuracy and the dynamic measurement precision are main technical indexes of photoelectric tracking and measurement equipment. Because of the lack of dynamic target position precision measuring technique, the space position precision of the optical dynamic target cannot get in the dynamic work condition. So the optical dynamic target has to be used as a tracking targets not a measurement target. This not only results in apart from the initial design of optical dynamic target measurement functions, but also makes the dynamic measurement performance of photoelectric tracking and measurement equipment cannot be measured.In this paper introduce a high-speed image processing measurement method, which is used for measuring the accuracy of the target position when the optical dynamic target is in the state of high-speed movement. Computer vision technology is applied to this method. High-speed video camera is used to record the reflection or transmission of energy in the spatial distribution of a substance in the objective world, and this point is used for measuring the characteristics of moving target in the entire field of view. Based on this measurement method, a set of spatial target position measurement system has been established, which includes a high-speed image measurement sub-system, a temporal reference synchronization sub-system, a data analysis and processing system and some other related software. And a measurement network with the optical dynamic target and the spatial target position measurement system has been built.By analyzing the relationship between the spatial simulation target and high-speed cameras, get the target and high-speed camera spatial movement relationship model. The model has been simulated and the simulation results verify that the model is correct. Recommend the calibration method of state parameters of the high-speed camera, and analyze of the precision of the method.Analyze and summarize the various error sources which influence measure precision of the system, including the optical system errors, the synchronization error, algorithm error, shaft shaking error and other errors etc. The internal parameters of the camera system have been calibrated, and the calibration method was given. Measure the optical lens distortion, and give the measurement method. Discuss the measurement method of the high-speed camera image sequence and test results were given. Discuss the algorithm of subpixel image and conducted accuracy analysis.Extend the application of spatial target position measurement system. The angular rate of the test table has been measured by this measurement system. This method made use of the angular relationship between the measuring equipment and testing equipment to establish a space model. The principle of this method has described and analyzed the measurement error. Measure a high-precision low-speed test table's angular rate with this method, and analyzed the data. The test data show that this method can be used for high-precision turntable's angular rate measurement.This paper mainly researched the method of dynamic simulation target space position precision measurement. Establish a set of spatial target position measurement system. The real value of spatial angular position of dynamic simulation target can be got in the dynamic working condition with this measurement system. It makes a foundation for solving the problem of dynamic metrical precision of the photoelectric tracking and measurement equipment at a step further. Fill the blank of dynamic testing field of photoelectric tracking and measurement equipment.