diff --git a/entry/src/main/ets/common/service/usbService.ts b/entry/src/main/ets/common/service/usbService.ts
new file mode 100644
index 00000000..f3691e19
--- /dev/null
+++ b/entry/src/main/ets/common/service/usbService.ts
@@ -0,0 +1,116 @@
+// 导入USB接口api包。
+import usb from '@ohos.usbManager';
+const LOGTAG = 'USBSERVICES'
+
+
+//字符串转字节
+function stringToArr(str){
+  var arr = [];
+  for (var i = 0, j = str.length; i < j; ++i) {
+    arr.push(str.charCodeAt(i));
+  }
+  return arr
+}
+
+//plc数据转成无锡科研所usb字节数据
+function plcStrToWXCodeArr(wuXiDataStr){
+  const arr = stringToArr(wuXiDataStr);
+  //数据包总长度 有效长度
+  let packetSize = 65,maxDataSize = 63;
+  let packetArr = []
+  const loop =  Math.ceil(arr.length / maxDataSize)
+  for(let i = 0; i< loop; i++){
+    const thisPacket = arr.slice(i * maxDataSize,(i + 1) * maxDataSize)
+    const oSize = maxDataSize - thisPacket.length;
+    //补齐0x00
+    if(oSize > 0){
+      let oSizeArr = []
+      for(let j  = 0;j < oSize;j++){oSizeArr.push(0x00)}
+      packetArr.push([thisPacket.length].concat(thisPacket).concat(oSizeArr));
+    }else{
+      packetArr.push([thisPacket.length].concat(thisPacket));
+    }
+  }
+  return packetArr
+}
+
+export default class UsbService{
+  private  devicepipe : usb.USBDevicePipe
+  private  outEndpoint: usb.USBEndpoint
+  public  isWXUSBDevice:Boolean
+
+  constructor() {
+    //是否是无锡检测设备
+    this.isWXUSBDevice = false
+    this.devicepipe
+    this.init()
+  }
+
+  init = async()=>{
+    // 获取设备列表。
+    let deviceList : Array<usb.USBDevice> = usb.getDevices();
+
+    deviceList.forEach(async (device:usb.USBDevice) => {
+      const {vendorId,productId} = device;
+      console.log(LOGTAG,JSON.stringify(device));
+      //无锡所检测设备接入
+      if(vendorId === 6790 && productId === 58409){
+        // if(vendorId === 2385 && productId === 5734){
+        // 申请操作指定的device的操作权限。
+        try {
+          let bool = usb.hasRight(device.name);
+          console.info(LOGTAG,'bool =>' + bool)
+          const isExit = await usb.requestRight(device.name);
+          console.info(LOGTAG,'isExit =>' + isExit)
+          if(isExit){
+            let devicepipe : usb.USBDevicePipe = usb.connectDevice(device);
+            let interfaces = device.configs[0].interfaces[0];
+            let ret = usb.claimInterface(devicepipe, interfaces,true);
+            console.info(LOGTAG,'ret =>' + ret);
+
+            if(ret === 0 ){
+              let outEndpoint : usb.USBEndpoint = interfaces.endpoints[1];
+              let inEndpoint : usb.USBEndpoint = interfaces.endpoints[0];
+              this.isWXUSBDevice = true;
+              this.devicepipe = devicepipe
+              this.outEndpoint = outEndpoint
+
+            }else{
+              console.info(LOGTAG,'usb claimInterface failed')
+            }
+
+          }else{
+            console.info(LOGTAG,'isExit =>' +'false')
+          }
+
+        } catch (e) {
+          console.info(LOGTAG,'e=>' + JSON.stringify(e))
+        }
+
+      }
+    });
+
+  }
+
+  sendUSB =async (wuXiDataStr) => {
+    const {devicepipe,isWXUSBDevice,outEndpoint} = this;
+    if(isWXUSBDevice){
+      const codeArr = plcStrToWXCodeArr(wuXiDataStr);
+      for(let i = 0; i < codeArr.length;i++){
+        try {
+          const f = await usb.bulkTransfer(devicepipe, outEndpoint, new Uint8Array(codeArr[i]))
+          console.info(LOGTAG,'发送成功数据长度为：' + f)
+        } catch (e) {
+          console.info(LOGTAG,JSON.stringify(e))
+        }
+      }
+    }else{
+      console.info(LOGTAG,'usb设备初始化失败')
+    }
+
+  }
+}
+
+
+
+// export default initUsbServicesFn
diff --git a/entry/src/main/ets/pages/judgeSDK/judge.ts b/entry/src/main/ets/pages/judgeSDK/judge.ts
index 20797019..37d58a3c 100644
--- a/entry/src/main/ets/pages/judgeSDK/judge.ts
+++ b/entry/src/main/ets/pages/judgeSDK/judge.ts
@@ -20,8 +20,10 @@ import {writeObjectOut,uploadExamProgressData} from '../../api/judge'
 import {deepClone,getCurrentTime,stringToASC,string2Bytes,fillZero,Array2Byte,convertGpsCoord2} from '../../common/utils/tools'
 import {getTranslateSignals,getCarStatus,getCarStatusType,getCenterProjectStatus,plcStrToJson,plcStrToWXJson,promptWxCode,getKmProjectVoice}  from './utils//judge-common'
 import {examJudgeSetLogCallback,examJudgeBeginExam,examJudgeInit,examJudgeRealExam,examJudgeSetRealExamCallback,examJudgeSetPerformCallback,examJudgeEndExam,examJudgeArtificialMark,examJudgeArtificialItem} from './api/index'
+import UsbService from '../../common/service/usbService'
 
 import prompt from '@ohos.prompt';
+import usbManager from '@ohos.usbManager';
 
 const judgeTag = 'SURENJUN_JUDGE'
 
@@ -40,6 +42,8 @@ export default class Judge{
     this.fileUtil = new FileUtil(judgeUI.context)
     this.judgeTask = new JudgeTask()
     const mediaTest= new FilePhoto(judgeUI.context);
+    const usbService = new UsbService();
+    this.usbService = usbService
     this.filePhoto = mediaTest
     this.kfArr = judgeUI.kfArr
     this.xmmcStr = '';this.xmmcCode = '';this.carztStr = '';
@@ -1001,6 +1005,7 @@ export default class Judge{
   private xmxh:string
   private fileModel:FileModel
   private filePhoto:FilePhoto
+  private usbService:UsbService
   //是否是考试模式
   private isExam:boolean
   //考试是否结束了