HTML5动态波形实时监控系统
HTML电压电流波形显示界面设计
采用HTML5、CSS3和JavaScript技术栈，结合Canvas API或SVG实现动态波形渲染。界面需包含实时数据显示区、历史数据回溯功能和参数配置面板。
<!DOCTYPE html>
<html>
<head>
<title>电力监控波形系统</title>
<style>
.waveform-container {
width: 800px;
height: 400px;
border: 1px solid #ccc;
position: relative;
}
.control-panel {
padding: 15px;
background: #f5f5f5;
}
</style>
</head>
<body>
<div class="waveform-container">
<canvas id="voltageCanvas"></canvas>
<canvas id="currentCanvas"></canvas>
</div>
<div class="control-panel">
<input type="range" id="timeRange" min="1" max="60">
</div>
<script src="waveform.js"></script>
</body>
</html>
波形绘制核心算法
采用Canvas 2D Context进行高效渲染，每秒60帧的刷新率下仍能保持流畅。电压波形使用蓝色曲线，电流波形使用红色曲线，两者采用不同Y轴比例尺。
// waveform.js
const voltageCtx = document.getElementById('voltageCanvas').getContext('2d');
const currentCtx = document.getElementById('currentCanvas').getContext('2d');
function drawWaveform(ctx, data, color, scale) {
ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
ctx.beginPath();
ctx.strokeStyle = color;
ctx.lineWidth = 2;
data.forEach((value, index) => {
const x = index * (ctx.canvas.width / data.length);
const y = ctx.canvas.height/2 - value * scale;
index === 0 ? ctx.moveTo(x, y) : ctx.lineTo(x, y);
});
ctx.stroke();
}
实时数据处理机制
建立WebSocket连接接收服务器数据，采用环形缓冲区存储最新1000个采样点。数据解析模块自动识别电压电流数据的单位（V/mV, A/mA）。
const bufferSize = 1000;
let voltageData = new Array(bufferSize).fill(0);
let currentData = new Array(bufferSize).fill(0);
const ws = new WebSocket('wss://your-server/stream');
ws.onmessage = (event) => {
const packet = JSON.parse(event.data);
voltageData.shift();
voltageData.push(packet.voltage);
currentData.shift();
currentData.push(packet.current);
render();
};
交互功能实现
添加鼠标悬停显示数值功能，支持缩放和平移操作。时间范围滑块控制显示的数据窗口大小，从1秒到1分钟可调。
document.getElementById('timeRange').addEventListener('input', (e) => {
const timeWindow = parseInt(e.target.value);
updateTimeAxis(timeWindow);
});
function updateTimeAxis(seconds) {
const samplesToShow = sampleRate * seconds;
// 调整显示的数据范围
}
性能优化策略
采用双缓冲技术避免画面闪烁，使用requestAnimationFrame进行节流渲染。大数据量时自动降采样显示，保持UI响应速度。
let isRendering = false;
function render() {
if(isRendering) return;
isRendering = true;
requestAnimationFrame(() => {
drawWaveform(voltageCtx, voltageData, '#3498db', 0.5);
drawWaveform(currentCtx, currentData, '#e74c3c', 0.2);
isRendering = false;
});
}
移动端适配方案
通过viewport meta标签确保显示比例正确，触摸事件支持双指缩放。CSS媒体查询调整控制面板布局，保证小屏幕下的可用性。
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
@media (max-width: 600px) {
.waveform-container {
width: 100%;
height: 300px;
}
.control-panel {
flex-direction: column;
}
}
扩展功能建议
- 添加FFT频谱分析功能
- 实现异常波形自动捕捉
- 集成数据导出为CSV/PNG
- 增加多通道同步显示支持
- 开发插件式测量工具（谐波分析、RMS计算等）
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