diff --git a/edc-web/app/static/js/test_data.js b/edc-web/app/static/js/test_data.js
index facc6d5..89330a8 100644
--- a/edc-web/app/static/js/test_data.js
+++ b/edc-web/app/static/js/test_data.js
@@ -241,6 +241,27 @@ const CHART_SERIES = {
     ],
 };
 
+// 继电器系列（添加到任意视图的图表末尾）
+function buildRelaySeries(records) {
+    return {
+        name: '继电器输出',
+        type: 'line',
+        step: 'end',
+        yAxisIndex: 3,
+        symbol: 'triangle',
+        symbolSize: 8,
+        lineStyle: { type: 'dotted', width: 2, color: '#e74c3c' },
+        itemStyle: { color: '#e74c3c' },
+        data: records.map(r => r.relay_code ?? null),
+        // tooltip 中显示解码后的文本
+        tooltip: {
+            valueFormatter: function (value) {
+                return RELAY_MAP[value] || `未知(${value})`;
+            }
+        },
+    };
+}
+
 function toggleChart() {
     const container = document.getElementById('chart-container');
     const btn = document.getElementById('btn-chart');
@@ -317,6 +338,9 @@ async function loadChart() {
         connectNulls: false,
     }));
 
+    // 添加继电器状态系列
+    series.push(buildRelaySeries(records));
+
     // 渲染 ECharts
     if (chartInstance) chartInstance.dispose();
     chartInstance = echarts.init(container);
@@ -344,7 +368,7 @@ async function loadChart() {
                 },
             },
         },
-        grid: { left: 60, right: 140, top: 60, bottom: 80 },
+        grid: { left: 60, right: 200, top: 60, bottom: 80 },
         xAxis: {
             type: 'category',
             data: times,
@@ -358,6 +382,15 @@ async function loadChart() {
             { type: 'value', name: '距离(mm)',  nameTextStyle: { fontSize: 11 } },
             { type: 'value', name: '速度(dm/s)',nameTextStyle: { fontSize: 11 },
               offset: 80 },
+            { type: 'value', name: '继电器输出', nameTextStyle: { fontSize: 11 },
+              min: -0.5, max: 3.5, interval: 1,
+              offset: 160,
+              axisLabel: {
+                  formatter: function (v) {
+                      return RELAY_MAP[v] || '';
+                  },
+                  fontSize: 10,
+              }},
         ],
         dataZoom: [
             { type: 'slider', start: 0, end: 100, height: 20, bottom: 30 },