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In this paper, to improve the testing accuracy of moving objects, the speed attenuation caused by air resistance was introduced into a double-N six-light-screen test system, and the pulse-time axis was recalibrated. Through error analyses of the yaw angle, pitch angle, and axial speed and distance, the advantages of this improved system for testing accuracy were demonstrated. In addition, the reliability of this system was verified through an experimental test with mud pellets. The results show that this system greatly improved the test accuracy of yaw angle and pitch angle, using certain statistical rules for test errors, and the error of the axial speed was only affected by pitch coordinates, while the distance error could reach the nanometer scale, which satisfies our test requirements for small-volume moving objects.

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