中文摘要：

磁浮车气隙检测常采用电涡流传感器，其在0-20mm量程范围内非线性严重，在实际工作时需要进行非线性校正，同时传感器工作环境恶劣，属于易损器件，需要经常检测维护。设计了一种气隙传感器测试系统，该系统以现场可编程门阵列（FPGA）作为控制核心，使用LabVIEW编写人机界面，实现了磁浮车气隙传感器输出特性的快速测试与在线校正。系统具有硬件结构简单、人机交互友好等特点。实验结果表明：该系统可方便监测传感器内部原始特性，经该系统校正后的传感器输出线性度良好，能满足磁浮列车悬浮控制系统要求。

英文摘要：

The eddy current sensor is employed to detect suspension gap in maglev train, and input-output characteristic of eddy current sensor is serious nonlinear when the gap range of 0 -20 mm, so the sensor should be calibrated, and sensor works in harsh environment and thus it is vulnerable and inspection and maintenance is needed sure. A gap sensor test system is designed to monitor the sensor characteristic and calibrate the nonlinear error. The main control unit of this system is designed with FPGA and the man-machine interface is compiled by LabVIEW,fast test and online calibration of output characteristic of maglev train gap sensor are realized. It has many advantages such as simple hardware structure and friendly man-machine interface. The experimental results show that the system can monitor the original characteristic of the sensor conveniently, output linearity of sensor corrected by this system is good, and it can meet the requirement of suspension control system perfectly.