关键词: 滑移率测试仪；标准滑移率装置；量值溯源；滑移率

Abstract: The slip rate is a critical parameter for evaluating vehicle braking safety performance. To address the problem of absence of standardized methods and devices for the direct calibration of slip rate testers in China, this paper designs a standard slip rate calibration device capable of directly calibrating slip rate testers. Firstly, the design principles of the standard device are introduced. Next, the parameter-setting process during calibration is systematically analyzed. Subsequently, the experimental results undergo uncertainty evaluation to verify the device's reliability and accuracy. Finally, the device is used to test different models of slip rate testers. The experimental results demonstrate that the proposed standard slip rate calibration device fully meets the calibration requirements for slip rate testers. Compared with traditional speed-traceable indirect calibration methods, the standard slip rate device offers significant advantages, including simpler operation, higher efficiency, and comprehensive performance evaluation of the testers. This provides a new technical approach for the metrological traceability of slip rate testers.

Key words: slip rate tester; standard slip rate device; metrological traceability; slip rate