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<title>Sequence-Diagram 时序图设计器 | Easy Data Collection</title>
<meta name="description" content="Sequence Diagram Studio —— 面向 PLC 流程节拍与相位角设计的 Flutter 桌面软件：条形节拍与圆周节拍双视图、FS/SS 依赖、关键路径、SVG/PNG 导出。">
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      <p class="hero-eyebrow">工具开发 · FLUTTER DESKTOP</p>
      <h1>时序图设计器<br>Sequence Diagram Studio</h1>
      <p class="page-hero-sub">面向 PLC 流程节拍设计 / 相位角设计的桌面设计软件。条形节拍与圆周节拍两种视图共享同一份数据，让动作顺序、依赖关系与关键路径一目了然。</p>
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        <a href="http://124.220.63.9:30000/admin/Sequence-Diagram" class="btn btn-light">项目主页（Gitea）</a>
        <a href="/tools/" class="btn btn-outline-light">返回工具开发</a>
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        <div class="hero-stat"><b>双视图</b><span>条形节拍 ⇄ 圆周节拍</span></div>
        <div class="hero-stat"><b>1000+</b><span>动作仍保持 60 fps</span></div>
        <div class="hero-stat"><b>V1.1.1</b><span>Flutter Windows 正式版</span></div>
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        <h2 class="section-title">已实现功能</h2>
        <p class="section-desc">从节拍建模、拖拽编辑到导出交付，覆盖 PLC 工艺设计的完整工作流。</p>
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        <div class="card"><div class="icon">⇄</div><h3>两种视图，一份数据</h3><p>条形节拍（甘特 / 流程图 + 依赖箭头）与圆周节拍（同心圆相位图，12 点钟起始，一圈 = 一个循环）顶部一键切换。</p></div>
        <div class="card"><div class="icon">↦</div><h3>顺序一目了然</h3><p>绿色实线箭头 = FS 严格顺序（完成后启动），琥珀虚线 = SS 并行重叠（可提前启动），关键路径带 ★ 高亮。</p></div>
        <div class="card"><div class="icon">◷</div><h3>专业单位体系</h3><p>时间 ms / s / min、相位 ° / %、显示精度可配，工艺参数面板（F2）统一管理并内置换算表。</p></div>
        <div class="card"><div class="icon">⚡</div><h3>响应快</h3><p>自研 Canvas 渲染，双层缓存 + 脏区重绘 + 空间索引，1000 个动作仍保持 60 fps。</p></div>
        <div class="card"><div class="icon">✎</div><h3>拖拽编辑与工位管理</h3><p>拖拽编辑相位、拖端点改持续角、Shift + 拖拽改层、双击空白新建动作；工位可增删、改名、调色、排序。</p></div>
        <div class="card"><div class="icon">▦</div><h3>节拍统计</h3><p>循环周期 / 动作数 / 关键路径 / 最大并行度 / 相位覆盖率 / 瓶颈工位，只展示可由项目数据推导的指标。</p></div>
        <div class="card"><div class="icon">☀</div><h3>深色 / 浅色双主题</h3><p>右上角一键切换（F3），语义颜色不变，导出 SVG 与屏幕一致。</p></div>
        <div class="card"><div class="icon">⤓</div><h3>导出 SVG / PNG</h3><p>SVG 矢量、分层、带语义 id 与 data-* 元数据，可直接进工艺卡与 MES；PNG 按 2 倍像素比导出。</p></div>
        <div class="card"><div class="icon">⛨</div><h3>可靠性与帮助</h3><p>自动定时快照 + 启动崩溃恢复 + .bak 备份；应用内帮助中心（F1）与完整使用文档。</p></div>
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      <h2 class="section-title">界面实录</h2>
      <p class="section-desc">以下均为软件实际运行界面（2560 × 1440）。</p>
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        <figure class="shot wide">
          <img src="/static/img/sequence/bar-timing.png" alt="条形节拍视图 - 深色主题">
          <figcaption>条形节拍视图（甘特 / 流程图 + FS/SS 依赖箭头 + 关键路径）—— 深色主题</figcaption>
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        <figure class="shot wide">
          <img src="/static/img/sequence/circular-timing.png" alt="圆周节拍视图 - 深色主题">
          <figcaption>圆周节拍视图（同心圆 · 12 点钟起始 · 顺时针）—— 深色主题</figcaption>
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          <img src="/static/img/sequence/unit-settings.png" alt="工艺参数面板">
          <figcaption>工艺参数面板（F2）—— 单位与精度 / 循环与相位 / 换算表 / 编辑辅助</figcaption>
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        <figure class="shot wide">
          <img src="/static/img/sequence/bar-timing-light.png" alt="条形节拍视图 - 浅色主题">
          <figcaption>条形节拍视图 —— 浅色主题</figcaption>
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