rev：急停修改

acs2/nladmin-system/src/main/java/org/nl/acs/device_driver/lamp_three_color/LampThreecolorDeviceDriver.java

@@ -1,5 +1,6 @@
 package org.nl.acs.device_driver.lamp_three_color;
 
+import cn.hutool.core.util.ObjectUtil;
 import com.alibaba.fastjson.JSONObject;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
@@ -142,9 +143,8 @@ public class LampThreecolorDeviceDriver extends AbstractOpcDeviceDriver implemen
          }
     }
 
-
     private void executeLogicBefore() {
-        if (error == 1) {
+        if (error == 1 && ObjectUtil.isNotEmpty(car_no)) {
             String[] carArr  = {car_no};
             JSONObject json = new JSONObject();
             json.put("vehicles", carArr);