鸿蒙智能紫外线指数提醒系统开发方案 原创

鸿蒙智能紫外线指数提醒系统开发方案

一、项目概述

本方案实现基于鸿蒙5.0的紫外线防护提醒系统，具有以下核心功能：
UV传感器动态校准

基于地理位置的指数修正

个性化皮肤类型防护建议

多设备数据分布式同步

二、技术架构

graph TD
A[智能手表] -->UV传感器
B(手机)
–>分布式数据
C[平板]

–>天气API
D[云端服务]

–> E[防护建议]

三、核心代码实现
UV传感器校准模块

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

export class UVSensorManager {
private calibrationFactor: number = 1.0;
private lastCalibrationTime: number = 0;

// 初始化UV传感器
async init() {
try {
await sensor.on(sensor.SensorType.SENSOR_TYPE_UV, (data) => {
this.handleUVData(data.value);
}, { interval: 60000 }); // 每分钟采样一次

  // 每日自动校准
  setInterval(() => this.autoCalibrate(), 86400000);

catch (err) {

  console.error('UV传感器初始化失败:', err);

}

// 处理原始UV数据
private handleUVData(rawValue: number) {
const calibratedValue = rawValue * this.calibrationFactor;
const uvIndex = this.calculateUVI(calibratedValue);
EventBus.emit(‘uviUpdate’, uvIndex);
// 自动校准流程

private async autoCalibrate() {
if (this.shouldCalibrate()) {
const reference = await this.getCloudReferenceValue();
const localRaw = await this.getLocalAverage();

  if (reference && localRaw) {
    this.calibrationFactor = reference / localRaw;
    this.lastCalibrationTime = Date.now();

}

// 计算UV指数

private calculateUVI(value: number): number {
return Math.round(value * 0.4); // 转换为标准指数
}

地理位置适配模块

// LocationAdapter.ets
import geolocation from ‘@ohos.geolocation’;
import { BusinessError } from ‘@ohos.base’;

export class LocationAdapter {
private currentAltitude: number = 0;
private currentLatitude: number = 0;

// 获取当前位置
async updateLocation() {
try {
const location = await geolocation.getCurrentLocation({
priority: geolocation.LocationPriority.FIRST_FIX
});

  this.currentLatitude = location.latitude;
  this.currentAltitude = location.altitude || 0;
  
  // 计算海拔修正因子
  const altitudeFactor = 1 + (this.currentAltitude / 1000 * 0.1);
  EventBus.emit('locationFactor', altitudeFactor);
  
  // 计算纬度修正因子
  const latitudeFactor = this.calculateLatitudeFactor();
  EventBus.emit('latitudeFactor', latitudeFactor);

catch (err) {

  console.error('获取位置失败:', (err as BusinessError).message);

}

// 计算纬度修正因子
private calculateLatitudeFactor(): number {
const absLat = Math.abs(this.currentLatitude);
return absLat < 20 ? 1.2 :
absLat < 40 ? 1.0 :
absLat < 60 ? 0.8 : 0.6;
// 获取时区阳光强度修正

getSolarNoonFactor(): number {
const now = new Date();
const utcHours = now.getUTCHours();
const localHours = now.getHours();
const delta = Math.abs(utcHours + (this.currentLongitude / 15) - localHours);

return 1 - (delta * 0.05); // 每小时差异减少5%强度

}

皮肤类型个性化模块

// SkinTypeManager.ets
export class SkinTypeManager {
private skinTypes = [
type: ‘I’, description: ‘极易晒伤’, burnTime: 10, spfRecommend: 50 },

type: ‘II’, description: ‘容易晒伤’, burnTime: 20, spfRecommend: 30 },

type: ‘III’, description: ‘中等敏感’, burnTime: 30, spfRecommend: 15 },

type: ‘IV’, description: ‘不易晒伤’, burnTime: 50, spfRecommend: 10 }

];

private currentSkinType: string = ‘III’; // 默认类型

// 设置皮肤类型
setSkinType(type: string) {
if (this.skinTypes.some(t => t.type === type)) {
this.currentSkinType = type;
preferences.putSync(‘skinType’, type);
}

// 获取防护建议
getProtectionAdvice(uvi: number): string {
const typeInfo = this.skinTypes.find(t => t.type === this.currentSkinType);
if (!typeInfo) return ‘请设置皮肤类型’;

const safeTime = Math.round(typeInfo.burnTime / (uvi * 0.8));
return 建议:\nSPF{typeInfo.spfRecommend}+防晒霜\n每{safeTime}分钟补涂;

// 计算危险等级

getRiskLevel(uvi: number): number {
const typeInfo = this.skinTypes.find(t => t.type === this.currentSkinType);
if (!typeInfo) return 0;

const relativeUVI = uvi * (100 / typeInfo.burnTime);
return relativeUVI > 80 ? 3 :  // 高危
       relativeUVI > 50 ? 2 :  // 中危
       1;                      // 低危

}

分布式数据同步模块

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

const STORE_ID = “uvi_data”;
const KEY_PREFIX = “uvi_”;

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

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

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

this.setupDataObserver();

// 同步UV数据

async syncUVData(data: UVData) {
const timestamp = Math.floor(data.timestamp / 60000) * 60000; // 分钟级时间戳
const key = {KEY_PREFIX}{timestamp};

try {
  await this.kvStore.put(key, JSON.stringify(data));
  
  const syncOptions = {
    devices: this.getSyncDevices(),
    mode: distributedData.SyncMode.PUSH_PULL,
    delay: this.getSyncDelay()
  };
  await this.kvStore.sync(syncOptions);

catch (err) {

  console.error('UV数据同步失败:', err);

}

// 获取同步设备列表
private getSyncDevices(): string[] {
return deviceManager.getAvailableDeviceListSync()
.filter(device => device.deviceType === DeviceType.PHONE ||
device.deviceType === DeviceType.TABLET)
.map(device => device.deviceId);
// 监听数据变化

private setupDataObserver() {
this.kvStore.on(‘dataChange’, distributedData.SubscribeType.SUBSCRIBE_TYPE_ALL, (changes) => {
changes.insertData.concat(changes.updateData).forEach(item => {
if (item.key.startsWith(KEY_PREFIX)) {
const data = JSON.parse(item.value) as UVData;
AppStorage.setOrCreate(‘latestUVData’, data);
});

});

}

四、完整应用实现

// UVMonitorApp.ets
import { UVSensorManager } from ‘./UVSensorManager’;
import { LocationAdapter } from ‘./LocationAdapter’;
import { SkinTypeManager } from ‘./SkinTypeManager’;
import { UVDataSync } from ‘./UVDataSync’;

@Entry
@Component
struct UVMonitorApp {
private sensorManager = new UVSensorManager();
private locationAdapter = new LocationAdapter();
private skinManager = new SkinTypeManager();
private dataSync = new UVDataSync();

@State currentUVI: number = 0;
@State riskLevel: number = 1;
@State advice: string = ‘’;

aboutToAppear() {
this.sensorManager.init();
this.locationAdapter.updateLocation();
this.dataSync.init();

// 加载用户皮肤类型
const savedType = preferences.getSync('skinType');
if (savedType) {
  this.skinManager.setSkinType(savedType);

// 监听UV指数更新

EventBus.on('uviUpdate', (uvi: number) => {
  this.currentUVI = uvi;
  this.riskLevel = this.skinManager.getRiskLevel(uvi);
  this.advice = this.skinManager.getProtectionAdvice(uvi);
  
  // 同步数据
  this.dataSync.syncUVData({
    timestamp: Date.now(),
    value: uvi,
    location: this.locationAdapter.currentLocation
  });
});

build() {

Column() {
  // UV指数显示
  UVIndexDisplay({ value: this.currentUVI, level: this.riskLevel })
  
  // 防护建议
  Text(this.advice)
    .fontSize(16)
    .margin({ top: 20 })
  
  // 皮肤类型选择
  SkinTypeSelector({
    onSelect: (type) => {
      this.skinManager.setSkinType(type);

})

  // 位置信息
  LocationInfo()

.width(‘100%’)

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

}

@Component
struct UVIndexDisplay {
@Param value: number
@Param level: number

build() {
Column() {
// 指数数值
Text(UV指数: ${this.value})
.fontSize(24)

  // 风险等级指示器
  Row() {
    ForEach([1, 2, 3], (i) => {
      Circle({ width: 20, height: 20 })
        .fillColor(i <= this.level ? r('app.color.danger') : r('app.color.safe'))
    })

.margin({ top: 10 })

}

@Component

struct SkinTypeSelector {
@Param onSelect: (type: string) => void
@State selectedType: string = ‘III’

build() {
Column() {
Text(‘选择皮肤类型:’)
.fontSize(16)
.margin({ bottom: 10 })

  Row() {
    ForEach(['I', 'II', 'III', 'IV'], (type) => {
      Button(type)
        .backgroundColor(this.selectedType === type ? r('app.color.active') : r('app.color.inactive'))
        .onClick(() => {
          this.selectedType = type;
          this.onSelect(type);
        })
    })

}

.margin({ top: 30 })

}

五、关键优化点
传感器校准优化：

// 动态校准策略
function shouldCalibrate(): boolean {
const hours = new Date().getHours();
return hours >= 11 && hours <= 13 && // 正午时分
weather.isSunny() && // 晴天
sensor.getAccuracy() > 2; // 精度足够

位置更新策略：

// 智能位置更新
function getLocationUpdateInterval(): number {
const speed = geolocation.getSpeed();
return speed > 20 ? 300000 : // 移动中每5分钟
speed > 5 ? 900000 : // 慢速移动每15分钟
3600000; // 静止时每小时

数据同步压缩：

// UV数据压缩算法
function compressUVData(data: UVData): Uint8Array {
const buffer = new ArrayBuffer(6);
const view = new DataView(buffer);
view.setUint16(0, Math.round(data.value 100)); // UV值100
view.setUint32(2, data.timestamp / 60000); // 分钟级时间戳
return new Uint8Array(buffer);

六、测试验证方案
传感器校准测试：

// 验证校准算法
function testCalibration() {
const manager = new UVSensorManager();
const rawValue = 50;
const reference = 40;
manager.testCalibration(rawValue, reference);
console.assert(manager.calibrationFactor === 0.8, ‘校准因子计算错误’);

皮肤类型测试：

// 验证防护建议
function testSkinTypeAdvice() {
const manager = new SkinTypeManager();
manager.setSkinType(‘II’);
const advice = manager.getProtectionAdvice(8);
console.assert(advice.includes(‘SPF30’), ‘建议SPF值不符’);

分布式同步测试：

// 测试多设备同步
async function testMultiDeviceSync() {
const testData = { timestamp: Date.now(), value: 7 };
await dataSync.syncUVData(testData);
const received = await checkOtherDeviceData();
console.assert(received.value === 7, ‘数据同步不一致’);

七、扩展功能
智能提醒：

// 基于位置的预警
function setupLocationAlerts() {
geolocation.on(‘locationChange’, (location) => {
const uv = forecast.getUVIndex(location);
if (uv > 6 && !user.hasAppliedSunscreen()) {
alert(‘当前UV指数高，请及时防护！’);
});

防晒日志：

// 记录防晒产品使用
class SunscreenLog {
private logs: Map<string, number> = new Map();

addApplication(product: string, spf: number) {
this.logs.set(product, Date.now());
this.scheduleReminder(spf);
private scheduleReminder(spf: number) {

const duration = spf  2  60  1000; // SPF2小时
setTimeout(() => {
  alert('请补涂防晒霜');
}, duration);

}

历史数据分析：

// 生成UV暴露报告
function generateUVReport(start: Date, end: Date) {
const data = database.queryUVData(start, end);
const stats = {
maxUVI: Math.max(…data.map(d => d.value)),
avgUVI: data.reduce((sum, d) => sum + d.value, 0) / data.length,
highRiskDays: data.filter(d => d.value > 6).length
};

return {
…stats,
riskAssessment: this.getRiskAssessment(stats)
};

本方案实现了完整的紫外线监测系统，通过传感器校准、地理位置适配和个性化防护建议，为用户提供精准的紫外线防护指导，是鸿蒙分布式能力在健康防护领域的创新应用。