diff --git a/src/main/java/com/topsail/influxdb/controller/DeviceDataController.java b/src/main/java/com/topsail/influxdb/controller/DeviceDataController.java
index 2990a81..4bca938 100644
--- a/src/main/java/com/topsail/influxdb/controller/DeviceDataController.java
+++ b/src/main/java/com/topsail/influxdb/controller/DeviceDataController.java
@@ -33,6 +33,10 @@ public class DeviceDataController {
     @GetMapping(value = "/getShengDiLanHistory")
     public Result getHistoryData(@RequestParam(name = "uid", required = false) String uid, @RequestParam(name = "pageNo", required = false) Integer pageNo, @RequestParam(name = "pageSize", required = false) Integer pageSize, @RequestParam(name = "startTime", required = false) String startTime, @RequestParam(name = "endTime", required = false) String endTime, @RequestParam(name = "imei") String imei) throws ParseException, BindException {
         List<DeviceHistoryVo> list = new ArrayList<>();
+        if(imei!=null&&!imei.equals("")){
+            //将设备号转成全小写
+            imei = imei.toLowerCase();
+        }
         list = deviceDataService.getDeviceHistoryData(uid, pageNo, pageSize, startTime, endTime, imei);
         Map<String, Object> map = Result.returnPageMap(list);
         return Result.success(map);