鸿蒙智能门窗异常报警系统开发方案原创

进修的泡芙

发布于 2025-6-23 13:27

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鸿蒙智能门窗异常报警系统开发方案

一、项目概述

本方案实现基于鸿蒙5.0的门窗异常监测报警系统，具有以下核心功能：
三轴加速度计异常震动检测

本地声音与灯光报警

防拆检测安全机制

多设备分布式报警同步

二、技术架构

graph TD
A[门窗传感器] -->蓝牙Mesh
B(手机)
–>分布式数据
C[智能家居中控]

–>防拆信号
D[安全警报器]

–> E[物业管理平台]

三、核心代码实现
加速度计事件检测

// MotionDetector.ets
import sensor from ‘@ohos.sensor’;

export class MotionDetector {
private lastAccelData: number[] = [0, 0, 0];
private eventCount: number = 0;
private readonly EVENT_THRESHOLD = 5;

// 初始化加速度计
async init() {
try {
await sensor.on(sensor.SensorType.SENSOR_TYPE_ACCELEROMETER, (data) => {
this.handleAccelData(data.values);
}, {
interval: 100, // 100ms采样间隔
sensitivity: 0.2 // 0.2g触发灵敏度
});
catch (err) {

  console.error('加速度计初始化失败:', err);

}

// 处理加速度数据
private handleAccelData(currentData: number[]) {
const deltaX = Math.abs(currentData[0] - this.lastAccelData[0]);
const deltaY = Math.abs(currentData[1] - this.lastAccelData[1]);
const deltaZ = Math.abs(currentData[2] - this.lastAccelData[2]);

// 综合变化量
const totalDelta = deltaX + deltaY + deltaZ;

if (totalDelta > 1.5) { // 1.5g变化阈值
  this.eventCount++;
  
  if (this.eventCount >= this.EVENT_THRESHOLD) {
    EventBus.emit('abnormalMotion');
    this.eventCount = 0;

}

this.lastAccelData = [...currentData];

// 调整灵敏度

async setSensitivity(level: number) {
await sensor.setParameters(sensor.SensorType.SENSOR_TYPE_ACCELEROMETER, {
sensitivity: level * 0.1 // 0.1g步进
});
}

本地报警系统

// LocalAlarm.ets
import audio from ‘@ohos.multimedia.audio’;
import vibrator from ‘@ohos.vibrator’;

export class LocalAlarm {
private audioRenderer: audio.AudioRenderer;
private alarmPattern = [500, 300, 500, 300, 1000]; // 报警震动模式

// 初始化音频
async init() {
const audioParams = {
streamUsage: audio.StreamUsage.STREAM_USAGE_ALARM,
contentType: audio.ContentType.CONTENT_TYPE_SONIFICATION
};
this.audioRenderer = await audio.createRenderer(audioParams);
// 触发报警

async triggerAlarm() {
await this.playAlarmSound();
await this.startVibration();
await this.flashLED();
// 播放报警音

private async playAlarmSound() {
const alarmBuffer = this.generateAlarmWave();
await this.audioRenderer.start();
await this.audioRenderer.write(alarmBuffer);
// 生成报警音频

private generateAlarmWave(): ArrayBuffer {
const duration = 3; // 3秒
const sampleRate = 44100;
const buffer = new ArrayBuffer(duration sampleRate 2);
const view = new DataView(buffer);

for (let i = 0; i < duration * sampleRate; i++) {
  const value = Math.sin(i  0.1)  32000;
  view.setInt16(i * 2, value, true);

return buffer;

// 启动震动

private async startVibration() {
await vibrator.vibrate({
duration: 0,
pattern: this.alarmPattern
});
// LED闪烁

private async flashLED() {
const led = await driver.open(‘alarm_led’);
for (let i = 0; i < 5; i++) {
await led.turnOn();
await new Promise(resolve => setTimeout(resolve, 200));
await led.turnOff();
await new Promise(resolve => setTimeout(resolve, 200));
await led.close();

}

防拆检测机制

// TamperDetector.ets
import driver from ‘@ohos.driver’;

export class TamperDetector {
private isTampered: boolean = false;

// 初始化防拆检测
async init() {
await driver.open(‘tamper_switch’);
driver.on(‘tamper’, (state) => {
this.handleTamperEvent(state);
});
// 处理防拆事件

private handleTamperEvent(state: boolean) {
if (state && !this.isTampered) {
this.isTampered = true;
EventBus.emit(‘tamperAlert’);

  // 记录防拆事件
  this.logTamperAttempt();

}

// 记录防拆尝试
private async logTamperAttempt() {
const timestamp = new Date().toISOString();
const logEntry = ${timestamp} - 防拆触发\n;

try {
  await fileIO.append('security.log', logEntry);

catch (err) {

  console.error('防拆记录失败:', err);

}

// 重置防拆状态
async reset() {
this.isTampered = false;
await driver.reset(‘tamper_switch’);
}

分布式报警同步

// AlarmSync.ets
import distributedData from ‘@ohos.data.distributedData’;

const STORE_ID = “alarm_events”;
const KEY_PREFIX = “alert_”;

export class AlarmSync {
private kvManager: distributedData.KVManager;
private kvStore: distributedData.KVStore;

async init() {
const config = {
bundleName: “com.security.alarm”,
context: getContext(this)
};

this.kvManager = distributedData.createKVManager(config);
this.kvStore = await this.kvManager.getKVStore(STORE_ID, {
  createIfMissing: true,
  encrypt: true,
  kvStoreType: distributedData.KVStoreType.SINGLE_VERSION
});

this.setupAlarmListener();

// 同步报警事件

async syncAlarmEvent(event: AlarmEvent) {
const key = {KEY_PREFIX}{Date.now()};
try {
await this.kvStore.put(key, JSON.stringify(event));

  const syncOptions = {
    devices: this.getSyncDevices(),
    mode: distributedData.SyncMode.PUSH_ONLY,
    delay: this.getSyncDelay()
  };
  await this.kvStore.sync(syncOptions);

catch (err) {

  console.error('报警同步失败:', err);

}

// 获取同步设备列表
private getSyncDevices(): string[] {
return deviceManager.getAvailableDeviceListSync()
.filter(device => device.deviceType === DeviceType.PHONE ||
device.deviceType === DeviceType.TV)
.map(device => device.deviceId);
// 监听报警事件

private setupAlarmListener() {
EventBus.on(‘abnormalMotion’, () => {
this.syncAlarmEvent({
type: ‘motion’,
timestamp: Date.now(),
severity: ‘high’
});
});

EventBus.on('tamperAlert', () => {
  this.syncAlarmEvent({
    type: 'tamper',
    timestamp: Date.now(),
    severity: 'critical'
  });
});

}

四、完整应用实现

// SecurityAlarmApp.ets
import { MotionDetector } from ‘./MotionDetector’;
import { LocalAlarm } from ‘./LocalAlarm’;
import { TamperDetector } from ‘./TamperDetector’;
import { AlarmSync } from ‘./AlarmSync’;

@Entry
@Component
struct SecurityAlarmApp {
private motionDetector = new MotionDetector();
private localAlarm = new LocalAlarm();
private tamperDetector = new TamperDetector();
private alarmSync = new AlarmSync();

@State alertStatus: ‘normal’ ‘motion’
‘tamper’ = ‘normal’;
@State lastAlertTime: string = ‘无’;

aboutToAppear() {
this.motionDetector.init();
this.localAlarm.init();
this.tamperDetector.init();
this.alarmSync.init();

// 监听异常事件
EventBus.on('abnormalMotion', () => {
  this.handleMotionAlert();
});

EventBus.on('tamperAlert', () => {
  this.handleTamperAlert();
});

// 处理异常震动

private async handleMotionAlert() {
this.alertStatus = ‘motion’;
this.lastAlertTime = new Date().toLocaleTimeString();
await this.localAlarm.triggerAlarm();

// 发送报警通知
notification.show('检测到门窗异常震动！');

// 处理防拆警报

private async handleTamperAlert() {
this.alertStatus = ‘tamper’;
this.lastAlertTime = new Date().toLocaleTimeString();
await this.localAlarm.triggerAlarm();

// 发送紧急通知
notification.show('警告：检测到设备被拆除！');

// 重置报警状态

private resetAlarm() {
this.alertStatus = ‘normal’;
this.tamperDetector.reset();
build() {

Column() {
  // 状态指示器
  StatusIndicator({ status: this.alertStatus })
  
  // 最后报警时间
  Text(最后报警: ${this.lastAlertTime})
    .fontSize(16)
    .margin({ top: 10 })
  
  // 控制按钮
  Row() {
    Button('测试报警')
      .onClick(() => this.localAlarm.triggerAlarm())
    
    Button('重置系统')
      .onClick(() => this.resetAlarm())

.margin({ top: 30 })

  // 灵敏度调节
  SensitivityControl({
    onChange: (level) => this.motionDetector.setSensitivity(level)
  })

.width(‘100%’)

.height('100%')
.padding(20)

}

@Component
struct StatusIndicator {
@Param status: string

build() {
Column() {
Image(this.getStatusImage())
.width(120)
.height(120)

  Text(this.getStatusText())
    .fontSize(20)
    .margin({ top: 10 })

}

private getStatusImage(): Resource {
return {
‘normal’: $r(‘app.media.status_normal’),
‘motion’: $r(‘app.media.status_alert’),
‘tamper’: $r(‘app.media.status_critical’)
}[this.status];
private getStatusText(): string {

return {
  'normal': '系统正常',
  'motion': '异常震动报警',
  'tamper': '防拆报警'
}[this.status];

}

@Component
struct SensitivityControl {
@Param onChange: (level: number) => void
@State currentLevel: number = 2;

build() {
Column() {
Text(灵敏度: ${this.currentLevel})
.fontSize(16)

  Slider({
    value: this.currentLevel,
    min: 1,
    max: 5,
    onChange: (value) => {
      this.currentLevel = value;
      this.onChange(value);

})

  .width('80%')

.margin({ top: 30 })

}

五、关键优化点
加速度计优化：

// 动态调整采样率
function adjustSamplingRate() {
const hour = new Date().getHours();
const rate = hour >= 22 || hour <= 6 ? 50 : // 夜间50ms
hour >= 18 ? 30 : // 傍晚30ms
20; // 白天20ms
sensor.setInterval(sensor.SensorType.SENSOR_TYPE_ACCELEROMETER, rate);

报警策略优化：

// 智能报警抑制
function shouldSuppressAlarm(): boolean {
const now = new Date();
const hour = now.getHours();
const isQuietHours = hour >= 22 || hour <= 7;

return isQuietHours &&
power.isLowPowerMode &&
!this.tamperDetector.isTampered;

防拆检测优化：

// 防拆信号滤波
function filterTamperSignal(raw: boolean): boolean {
if (!raw) return false;

// 持续检测500ms防止误触发
return new Promise(resolve => {
setTimeout(() => {
resolve(driver.read(‘tamper_switch’));
}, 500);
});

六、测试验证方案
震动检测测试：

// 模拟不同震动强度
function testVibrationDetection() {
const testLevels = [0.5, 1.0, 1.5, 2.0]; // g
testLevels.forEach(level => {
simulateVibration(level);
console.assert(app.motionDetector.eventCount === (level > 1.5 ? 1 : 0));
});

报警响应测试：

// 验证报警响应时间
function testAlarmResponse() {
const start = Date.now();
app.triggerTestAlarm();
setTimeout(() => {
console.assert(Date.now() - start < 1000, ‘报警响应超时’);
}, 1000);

防拆测试：

// 测试防拆机制
function testTamperDetection() {
simulateTamper();
setTimeout(() => {
console.assert(app.tamperDetector.isTampered, ‘防拆检测失败’);
app.resetAlarm();
console.assert(!app.tamperDetector.isTampered, ‘重置失败’);
}, 600);

七、项目扩展方向
视频联动：

// 报警时触发摄像头
function setupCameraLink() {
EventBus.on(‘abnormalMotion’, () => {
securityCamera.startRecording();
securityCamera.takeSnapshot();
});

智能家居联动：

// 报警时开启全屋灯光
function setupLightingLink() {
EventBus.on(‘alarmTriggered’, () => {
smartLight.turnOnAll();
smartLight.setColor(Color.Red);
});

报警模式切换：

// 离家/在家模式
function setAlarmMode(mode: ‘away’ | ‘home’) {
const config = {
sensitivity: mode === ‘away’ ? 1.0 : 1.5,
soundVolume: mode === ‘away’ ? 100 : 70
};
app.updateConfig(config);

本方案实现了完整的门窗异常报警系统，通过多维度传感器检测、本地报警和分布式同步，构建了高效可靠的安全防护体系，是鸿蒙分布式能力在安防领域的典型应用。

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