采用非接触式电容传感器、电涡流传感器组合系统获取检测信号 ,利用基于LabVIEW软件平台的计算机实现对塑料薄膜进行在线检测的工作原理 ,整个系统由测试单元、电机驱动单元、数据采集与处理单元组成。由于测试单元采用了电容、电涡流组合传感系统 ,信号的后续处理由基于LabVIEW软件平台的计算机自动完成 ,加速了测量过程。采用本系统取代传统的千分尺测量方法 ,可以使塑料薄膜厚度测量以完全智能的、实时的、非接触的方式进行精确测量。最后 ,通过比较组合测量系统与千分尺测量的测试结果 ,证明了该系统具有较高的精度 ,良好的可靠性与可行性。 The system uses the non-contact capacitive sensor and eddy current sensor to obtain the detection signal. The working principle of on-line detection of plastic film is realized by the computer based on LabVIEW software platform. The whole system consists of the test unit, motor drive unit, data acquisition and processing unit . As the test unit uses a capacitive, eddy current sensor system combination, the subsequent signal processing by the LabVIEW software platform based on the computer automatically to speed up the measurement process. Using this system instead of the traditional micrometer measurement method, plastic film thickness measurement can be accurately measured in a completely intelligent, real-time, non-contact manner. Finally, the system is proved to have high accuracy, good reliability and feasibility by comparing the test results measured by the combination measuring system and the micrometer.