diff --git a/contracts/manifest.json b/contracts/manifest.json
index 0f3d7a5..464233d 100644
--- a/contracts/manifest.json
+++ b/contracts/manifest.json
@@ -7,7 +7,7 @@
     },
     "server": {
       "file": "server-v1.openapi.json",
-      "sha256": "9cd5b962e9556ec227c52d0dc7d4ef4af562dcea86e16877c923c37de0f4f704"
+      "sha256": "b003a57c9b8c1a041b644363ef58afb8bfcede1fe076ce48a190d2a1ac915e3f"
     }
   }
 }
diff --git a/contracts/server-v1.openapi.json b/contracts/server-v1.openapi.json
index f6ddeac..cd08f0e 100644
--- a/contracts/server-v1.openapi.json
+++ b/contracts/server-v1.openapi.json
@@ -2598,6 +2598,18 @@
             "title": "Map Y",
             "type": "number"
           },
+          "max_pipe_diameter": {
+            "anyOf": [
+              {
+                "type": "number"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "节点关联管道的最大管径，单位：毫米",
+            "title": "Max Pipe Diameter"
+          },
           "node_id": {
             "title": "Node Id",
             "type": "string"
@@ -2613,6 +2625,7 @@
         },
         "required": [
           "node_id",
+          "max_pipe_diameter",
           "project_x",
           "project_y",
           "map_x",
@@ -35546,6 +35559,114 @@
         ]
       }
     },
+    "/api/v1/sensor-placement-candidates/{node_id}": {
+      "get": {
+        "operationId": "get_sensor_placement_candidates_node_id",
+        "parameters": [
+          {
+            "in": "path",
+            "name": "node_id",
+            "required": true,
+            "schema": {
+              "maxLength": 32,
+              "minLength": 1,
+              "title": "Node Id",
+              "type": "string"
+            }
+          },
+          {
+            "in": "header",
+            "name": "X-Project-Id",
+            "required": true,
+            "schema": {
+              "title": "X-Project-Id",
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/SensorPointResponse"
+                }
+              }
+            },
+            "description": "Successful Response"
+          },
+          "401": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ProblemDetails"
+                }
+              }
+            },
+            "description": "Authentication required"
+          },
+          "403": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ProblemDetails"
+                }
+              }
+            },
+            "description": "Insufficient permission"
+          },
+          "404": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ProblemDetails"
+                }
+              }
+            },
+            "description": "Resource not found"
+          },
+          "409": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ProblemDetails"
+                }
+              }
+            },
+            "description": "Resource conflict"
+          },
+          "422": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ProblemDetails"
+                }
+              }
+            },
+            "description": "Validation error"
+          },
+          "503": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ProblemDetails"
+                }
+              }
+            },
+            "description": "Dependency unavailable"
+          }
+        },
+        "security": [
+          {
+            "OAuth2PasswordBearer": []
+          }
+        ],
+        "summary": "获取监测点候选节点详情",
+        "tags": [
+          "Sensor Placement"
+        ]
+      }
+    },
     "/api/v1/sensor-placement-optimization-runs": {
       "post": {
         "operationId": "post_sensor_placement_optimization_runs",
diff --git a/src/components/olmap/MonitoringPlaceOptimization/MonitoringPlaceOptimizationPanel.test.tsx b/src/components/olmap/MonitoringPlaceOptimization/MonitoringPlaceOptimizationPanel.test.tsx
index 5b0206a..fa71ecb 100644
--- a/src/components/olmap/MonitoringPlaceOptimization/MonitoringPlaceOptimizationPanel.test.tsx
+++ b/src/components/olmap/MonitoringPlaceOptimization/MonitoringPlaceOptimizationPanel.test.tsx
@@ -1,5 +1,6 @@
 import { act, fireEvent, render, screen } from "@testing-library/react";
 import MonitoringPlaceOptimizationPanel, {
+  getMonitoringLayerVisibility,
   getTabIndicatorSx,
   getTabIndicatorTransform,
 } from "./MonitoringPlaceOptimizationPanel";
@@ -7,6 +8,7 @@ import { getSensorPlacementScheme } from "./schemeApi";
 import type { SensorPlacementScheme } from "./types";
 
 const mockSchemeEditorRender = jest.fn();
+const mockSchemeQueryRender = jest.fn();
 
 jest.mock("@refinedev/core", () => ({
   useNotification: () => ({ open: jest.fn() }),
@@ -20,9 +22,16 @@ jest.mock("./OptimizationParameters", () => ({
 
 jest.mock("./SchemeQuery", () => ({
   __esModule: true,
-  default: ({ onEdit }: { onEdit: (schemeId: number) => void }) => (
-    <button onClick={() => onEdit(7)}>打开测试方案</button>
-  ),
+  default: ({
+    onEdit,
+    active,
+  }: {
+    onEdit: (schemeId: number) => void;
+    active?: boolean;
+  }) => {
+    mockSchemeQueryRender(active);
+    return <button onClick={() => onEdit(7)}>打开测试方案</button>;
+  },
   createMonitoringSchemeQueryState: () => ({}),
 }));
 
@@ -66,6 +75,7 @@ const scheme: SensorPlacementScheme = {
 describe("MonitoringPlaceOptimizationPanel", () => {
   beforeEach(() => {
     mockSchemeEditorRender.mockClear();
+    mockSchemeQueryRender.mockClear();
   });
 
   it("applies equal-width positioning to the rendered tab indicator", () => {
@@ -90,6 +100,21 @@ describe("MonitoringPlaceOptimizationPanel", () => {
     expect(indicator).toHaveStyle({ transform: "translateX(200%)" });
   });
 
+  it("keeps query and editor layers mutually exclusive by active tab", () => {
+    expect(getMonitoringLayerVisibility(0)).toEqual({
+      editor: false,
+      query: false,
+    });
+    expect(getMonitoringLayerVisibility(1)).toEqual({
+      editor: true,
+      query: false,
+    });
+    expect(getMonitoringLayerVisibility(2)).toEqual({
+      editor: false,
+      query: true,
+    });
+  });
+
   it("prepares a queried scheme before switching to the result editor", async () => {
     let resolveScheme: (value: SensorPlacementScheme) => void = () => {};
     mockGetSensorPlacementScheme.mockReturnValue(
@@ -119,5 +144,23 @@ describe("MonitoringPlaceOptimizationPanel", () => {
       false,
       true,
     ]);
+    expect(mockSchemeQueryRender.mock.calls.at(-1)?.[0]).toBe(false);
+  });
+
+  it("keeps the active result layer visible when the panel is collapsed", async () => {
+    mockGetSensorPlacementScheme.mockResolvedValue(scheme);
+    render(<MonitoringPlaceOptimizationPanel />);
+
+    fireEvent.click(screen.getByRole("tab", { name: /方案查询/ }));
+    fireEvent.click(screen.getByRole("button", { name: "打开测试方案" }));
+    await screen.findByTestId("scheme-editor");
+
+    const collapseButton = screen
+      .getByTestId("ChevronRightIcon")
+      .closest("button");
+    expect(collapseButton).not.toBeNull();
+    fireEvent.click(collapseButton!);
+
+    expect(mockSchemeEditorRender.mock.calls.at(-1)?.[0]).toBe(true);
   });
 });
diff --git a/src/components/olmap/MonitoringPlaceOptimization/MonitoringPlaceOptimizationPanel.tsx b/src/components/olmap/MonitoringPlaceOptimization/MonitoringPlaceOptimizationPanel.tsx
index f6e9388..5975baf 100644
--- a/src/components/olmap/MonitoringPlaceOptimization/MonitoringPlaceOptimizationPanel.tsx
+++ b/src/components/olmap/MonitoringPlaceOptimization/MonitoringPlaceOptimizationPanel.tsx
@@ -69,6 +69,11 @@ export const getTabIndicatorSx = (tabIndex: number) => ({
   },
 });
 
+export const getMonitoringLayerVisibility = (tabIndex: number) => ({
+  editor: tabIndex === 1,
+  query: tabIndex === 2,
+});
+
 interface PreparedSchemeEditorProps
   extends React.ComponentProps<typeof SchemeEditor> {
   onReady?: () => void;
@@ -126,6 +131,7 @@ const MonitoringPlaceOptimizationPanel: React.FC<
   };
 
   const drawerWidth = currentTab === 1 ? 820 : 520;
+  const layerVisibility = getMonitoringLayerVisibility(currentTab);
 
   const handleSchemeEditorReady = useCallback(() => {
     setCurrentTab(1);
@@ -326,7 +332,7 @@ const MonitoringPlaceOptimizationPanel: React.FC<
               <PreparedSchemeEditor
                 scheme={activeScheme}
                 network={NETWORK_NAME}
-                active={isOpen && currentTab === 1}
+                active={layerVisibility.editor}
                 onSaved={handleSchemeSaved}
                 onReady={
                   pendingOpenSchemeId === activeScheme.id
@@ -346,6 +352,7 @@ const MonitoringPlaceOptimizationPanel: React.FC<
           <TabPanel value={currentTab} index={2}>
             <SchemeQuery
               schemes={schemes}
+              active={layerVisibility.query}
               onSchemesChange={setSchemes}
               state={queryState}
               onStateChange={setQueryState}
diff --git a/src/components/olmap/MonitoringPlaceOptimization/SchemeEditor.test.tsx b/src/components/olmap/MonitoringPlaceOptimization/SchemeEditor.test.tsx
index a49439d..bb0ff3c 100644
--- a/src/components/olmap/MonitoringPlaceOptimization/SchemeEditor.test.tsx
+++ b/src/components/olmap/MonitoringPlaceOptimization/SchemeEditor.test.tsx
@@ -1,9 +1,16 @@
 import { act, fireEvent, render, screen, waitFor } from "@testing-library/react";
 import SchemeEditor from "./SchemeEditor";
+import { getSensorPlacementCandidate } from "./schemeApi";
 import type { SensorPlacementScheme } from "./types";
+import { handleMapClickSelectFeatures } from "@/utils/mapQueryService";
 
 const mockOpen = jest.fn();
 let mockSingleClickHandler: ((event: unknown) => void) | undefined;
+let mockGridColumns: Array<{
+  field: string;
+  headerName?: string;
+  valueFormatter?: (value: unknown) => string;
+}> = [];
 
 const mockMap = {
   addLayer: jest.fn(),
@@ -32,19 +39,23 @@ jest.mock("@components/olmap/core/MapComponent", () => ({
 
 jest.mock("@mui/x-data-grid", () => ({
   DataGrid: (props: {
+    columns: typeof mockGridColumns;
     density?: string;
     initialState?: { density?: string };
     rowHeight?: number;
     columnHeaderHeight?: number;
-  }) => (
-    <div
-      data-testid="scheme-grid"
-      data-density={props.density ?? "uncontrolled"}
-      data-initial-density={props.initialState?.density ?? ""}
-      data-row-height={props.rowHeight ?? "automatic"}
-      data-column-header-height={props.columnHeaderHeight ?? "automatic"}
-    />
-  ),
+  }) => {
+    mockGridColumns = props.columns;
+    return (
+      <div
+        data-testid="scheme-grid"
+        data-density={props.density ?? "uncontrolled"}
+        data-initial-density={props.initialState?.density ?? ""}
+        data-row-height={props.rowHeight ?? "automatic"}
+        data-column-header-height={props.columnHeaderHeight ?? "automatic"}
+      />
+    );
+  },
   GridToolbar: () => null,
 }));
 
@@ -119,11 +130,6 @@ jest.mock("ol/style", () => ({
   Text: class {},
 }));
 
-jest.mock("ol/proj", () => ({
-  fromLonLat: (coordinates: number[]) => coordinates,
-  toLonLat: (coordinates: number[]) => coordinates,
-}));
-
 jest.mock("@/utils/mapQueryService", () => ({
   handleMapClickSelectFeatures: jest.fn(),
 }));
@@ -135,6 +141,7 @@ jest.mock("./SchemeDrawingDialog", () => ({
 
 jest.mock("./schemeApi", () => ({
   exportSensorPlacementExcel: jest.fn(),
+  getSensorPlacementCandidate: jest.fn(),
   overwriteSensorPlacementScheme: jest.fn(),
 }));
 
@@ -149,6 +156,7 @@ const scheme: SensorPlacementScheme = {
   sensor_points: [
     {
       node_id: "J1",
+      max_pipe_diameter: 400,
       project_x: 10,
       project_y: 20,
       map_x: 13500010,
@@ -161,10 +169,18 @@ const scheme: SensorPlacementScheme = {
   can_edit: true,
 };
 
+const mockGetSensorPlacementCandidate = jest.mocked(
+  getSensorPlacementCandidate,
+);
+const mockHandleMapClickSelectFeatures = jest.mocked(
+  handleMapClickSelectFeatures,
+);
+
 describe("SchemeEditor notifications", () => {
   beforeEach(() => {
     jest.clearAllMocks();
     mockSingleClickHandler = undefined;
+    mockGridColumns = [];
   });
 
   it("uses the same error notification contract as scheme query when replace starts outside an existing sensor", async () => {
@@ -187,6 +203,38 @@ describe("SchemeEditor notifications", () => {
     });
   });
 
+  it("loads authoritative point details when adding a map-selected node", async () => {
+    mockHandleMapClickSelectFeatures.mockResolvedValue({
+      get: (key: string) => (key === "id" ? "J2" : undefined),
+      getId: () => "J2",
+    } as never);
+    mockGetSensorPlacementCandidate.mockResolvedValue({
+      node_id: "J2",
+      max_pipe_diameter: 500,
+      project_x: 30,
+      project_y: 40,
+      map_x: 13500030,
+      map_y: 3600040,
+      longitude: 121.1,
+      latitude: 31.1,
+      elevation: 6,
+    });
+    render(<SchemeEditor scheme={scheme} network="fengyang" />);
+
+    fireEvent.click(screen.getByRole("button", { name: "添加" }));
+    await waitFor(() => expect(mockSingleClickHandler).toBeDefined());
+    await act(async () => {
+      mockSingleClickHandler?.({
+        pixel: [0, 0],
+        coordinate: [13500030, 3600040],
+        stopPropagation: jest.fn(),
+      });
+      await Promise.resolve();
+    });
+
+    expect(mockGetSensorPlacementCandidate).toHaveBeenCalledWith("J2");
+  });
+
   it("lets the Data Grid density selector control row sizing", () => {
     render(<SchemeEditor scheme={scheme} network="fengyang" />);
 
@@ -207,4 +255,22 @@ describe("SchemeEditor notifications", () => {
       "automatic",
     );
   });
+
+  it("places actions and status first and displays the selected pipe diameter", () => {
+    render(<SchemeEditor scheme={scheme} network="fengyang" />);
+
+    expect(mockGridColumns.slice(0, 5).map((column) => column.field)).toEqual([
+      "actions",
+      "adjustment_status",
+      "sequence",
+      "node_id",
+      "max_pipe_diameter",
+    ]);
+    const diameterColumn = mockGridColumns.find(
+      (column) => column.field === "max_pipe_diameter",
+    );
+    expect(diameterColumn?.headerName).toBe("最大管径 (mm)");
+    expect(diameterColumn?.valueFormatter?.(400)).toBe("400");
+    expect(diameterColumn?.valueFormatter?.(null)).toBe("无");
+  });
 });
diff --git a/src/components/olmap/MonitoringPlaceOptimization/SchemeEditor.tsx b/src/components/olmap/MonitoringPlaceOptimization/SchemeEditor.tsx
index 14895a1..f0f1d71 100644
--- a/src/components/olmap/MonitoringPlaceOptimization/SchemeEditor.tsx
+++ b/src/components/olmap/MonitoringPlaceOptimization/SchemeEditor.tsx
@@ -45,10 +45,7 @@ import Point from "ol/geom/Point";
 import VectorLayer from "ol/layer/Vector";
 import VectorSource from "ol/source/Vector";
 import { Circle, Fill, Stroke, Style, Text } from "ol/style";
-import { fromLonLat, toLonLat } from "ol/proj";
 import { useNotification } from "@refinedev/core";
-import { api } from "@/lib/api";
-import { config } from "@/config/config";
 import { useMap } from "@components/olmap/core/MapComponent";
 import { handleMapClickSelectFeatures } from "@/utils/mapQueryService";
 import {
@@ -65,6 +62,7 @@ import {
 } from "./schemeEditor";
 import {
   exportSensorPlacementExcel,
+  getSensorPlacementCandidate,
   overwriteSensorPlacementScheme,
 } from "./schemeApi";
 import SchemeDrawingDialog from "./SchemeDrawingDialog";
@@ -147,6 +145,8 @@ const SchemeEditor: React.FC<SchemeEditorProps> = ({
   const [saveDialogOpen, setSaveDialogOpen] = useState(false);
   const [drawingOpen, setDrawingOpen] = useState(false);
   const markerLayerRef = useRef<VectorLayer<VectorSource> | null>(null);
+  const activeRef = useRef(active);
+  activeRef.current = active;
 
   useEffect(() => {
     setEditor(createSchemeEditorState(scheme));
@@ -171,6 +171,7 @@ const SchemeEditor: React.FC<SchemeEditorProps> = ({
       },
       zIndex: 120,
     });
+    layer.setVisible(activeRef.current);
     markerLayerRef.current = layer;
     map.addLayer(layer);
     return () => {
@@ -206,47 +207,8 @@ const SchemeEditor: React.FC<SchemeEditorProps> = ({
       const feature = await handleMapClickSelectFeatures(event, map);
       const nodeId = String(feature?.get("id") ?? feature?.getId() ?? "").trim();
       if (!nodeId) return null;
-      const featureGeometry = feature?.getGeometry();
-      const featureCoordinate =
-        featureGeometry instanceof Point
-          ? featureGeometry.getCoordinates()
-          : event.coordinate;
-      const projectedFeatureCoordinate =
-        Math.abs(featureCoordinate[0]) <= 180 &&
-        Math.abs(featureCoordinate[1]) <= 90
-          ? fromLonLat(featureCoordinate)
-          : featureCoordinate;
-      const resolution = map.getView().getResolution() ?? 1;
-      const isAlignedWithMap =
-        Math.hypot(
-          projectedFeatureCoordinate[0] - event.coordinate[0],
-          projectedFeatureCoordinate[1] - event.coordinate[1],
-        ) <=
-        resolution * 20;
-      const [mapX, mapY] = isAlignedWithMap
-        ? projectedFeatureCoordinate
-        : event.coordinate;
       try {
-        const response = await api.get<{
-          id: string;
-          x: number;
-          y: number;
-          elevation: number;
-        }>(`${config.BACKEND_URL}/api/v1/junctions/properties`, {
-          params: { junction: nodeId },
-        });
-        if (!response.data?.id) return null;
-        const [longitude, latitude] = toLonLat([mapX, mapY]);
-        return {
-          node_id: String(response.data.id),
-          project_x: Number(response.data.x),
-          project_y: Number(response.data.y),
-          map_x: mapX,
-          map_y: mapY,
-          longitude,
-          latitude,
-          elevation: Number(response.data.elevation),
-        };
+        return await getSensorPlacementCandidate(nodeId);
       } catch {
         return null;
       }
@@ -436,6 +398,70 @@ const SchemeEditor: React.FC<SchemeEditorProps> = ({
 
   const columns = useMemo<GridColDef<SensorPointRow>[]>(
     () => [
+      {
+        field: "actions",
+        headerName: "操作",
+        width: scheme.can_edit ? 138 : 54,
+        sortable: false,
+        filterable: false,
+        renderCell: ({ row }) => (
+          <Stack direction="row" spacing={0.25} sx={{ alignItems: "center" }}>
+            <Tooltip title="地图定位">
+              <IconButton
+                aria-label={`定位节点 ${row.node_id}`}
+                size="small"
+                onClick={() => locateRow(row)}
+                sx={{ width: 40, height: 40 }}
+              >
+                <LocateIcon fontSize="small" />
+              </IconButton>
+            </Tooltip>
+            {scheme.can_edit && (
+              <>
+                <Tooltip title="替换节点">
+                  <IconButton
+                    aria-label={`替换节点 ${row.node_id}`}
+                    size="small"
+                    onClick={() => activateMode("replace", row.node_id)}
+                    sx={{ width: 40, height: 40 }}
+                  >
+                    <ReplaceIcon fontSize="small" />
+                  </IconButton>
+                </Tooltip>
+                <Tooltip title="删除节点">
+                  <span>
+                    <IconButton
+                      aria-label={`删除节点 ${row.node_id}`}
+                      size="small"
+                      onClick={() => handleDelete(row.node_id)}
+                      disabled={rows.length <= 1}
+                      sx={{ width: 40, height: 40 }}
+                    >
+                      <DeleteIcon fontSize="small" />
+                    </IconButton>
+                  </span>
+                </Tooltip>
+              </>
+            )}
+          </Stack>
+        ),
+      },
+      {
+        field: "adjustment_status",
+        headerName: "调整状态",
+        width: 108,
+        renderCell: ({ value }) => {
+          const status = value as AdjustmentStatus;
+          return (
+            <Chip
+              label={STATUS_LABELS[status]}
+              color={STATUS_COLORS[status]}
+              variant="outlined"
+              size="small"
+            />
+          );
+        },
+      },
       {
         field: "sequence",
         headerName: "序号",
@@ -445,6 +471,21 @@ const SchemeEditor: React.FC<SchemeEditorProps> = ({
         sortable: false,
       },
       { field: "node_id", headerName: "节点 ID", minWidth: 120, flex: 0.8 },
+      {
+        field: "max_pipe_diameter",
+        headerName: "最大管径 (mm)",
+        description: "节点关联管道中的最大管径",
+        minWidth: 132,
+        flex: 0.75,
+        align: "right",
+        headerAlign: "right",
+        valueFormatter: (value) => {
+          if (value == null || !Number.isFinite(Number(value))) return "无";
+          return Number(value).toLocaleString("zh-CN", {
+            maximumFractionDigits: 3,
+          });
+        },
+      },
       {
         field: "longitude",
         headerName: "经度",
@@ -507,70 +548,6 @@ const SchemeEditor: React.FC<SchemeEditorProps> = ({
         headerAlign: "right",
         valueFormatter: (value) => Number(value).toFixed(3),
       },
-      {
-        field: "adjustment_status",
-        headerName: "调整状态",
-        width: 108,
-        renderCell: ({ value }) => {
-          const status = value as AdjustmentStatus;
-          return (
-          <Chip
-            label={STATUS_LABELS[status]}
-            color={STATUS_COLORS[status]}
-            variant="outlined"
-            size="small"
-          />
-          );
-        },
-      },
-      {
-        field: "actions",
-        headerName: "操作",
-        width: scheme.can_edit ? 138 : 54,
-        sortable: false,
-        filterable: false,
-        renderCell: ({ row }) => (
-          <Stack direction="row" spacing={0.25} sx={{ alignItems: "center" }}>
-            <Tooltip title="地图定位">
-              <IconButton
-                aria-label={`定位节点 ${row.node_id}`}
-                size="small"
-                onClick={() => locateRow(row)}
-                sx={{ width: 40, height: 40 }}
-              >
-                <LocateIcon fontSize="small" />
-              </IconButton>
-            </Tooltip>
-            {scheme.can_edit && (
-              <>
-                <Tooltip title="替换节点">
-                  <IconButton
-                    aria-label={`替换节点 ${row.node_id}`}
-                    size="small"
-                    onClick={() => activateMode("replace", row.node_id)}
-                    sx={{ width: 40, height: 40 }}
-                  >
-                    <ReplaceIcon fontSize="small" />
-                  </IconButton>
-                </Tooltip>
-                <Tooltip title="删除节点">
-                  <span>
-                    <IconButton
-                      aria-label={`删除节点 ${row.node_id}`}
-                      size="small"
-                      onClick={() => handleDelete(row.node_id)}
-                      disabled={rows.length <= 1}
-                      sx={{ width: 40, height: 40 }}
-                    >
-                      <DeleteIcon fontSize="small" />
-                    </IconButton>
-                  </span>
-                </Tooltip>
-              </>
-            )}
-          </Stack>
-        ),
-      },
     ],
     [activateMode, handleDelete, locateRow, rows.length, scheme.can_edit],
   );
diff --git a/src/components/olmap/MonitoringPlaceOptimization/SchemeQuery.tsx b/src/components/olmap/MonitoringPlaceOptimization/SchemeQuery.tsx
index c57a603..7345846 100644
--- a/src/components/olmap/MonitoringPlaceOptimization/SchemeQuery.tsx
+++ b/src/components/olmap/MonitoringPlaceOptimization/SchemeQuery.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import React, { useEffect, useMemo, useState } from "react";
+import React, { useEffect, useMemo, useRef, useState } from "react";
 import {
   Box,
   Button,
@@ -53,6 +53,7 @@ interface SchemaItem {
 
 interface SchemeQueryProps {
   schemes?: SchemeRecord[];
+  active?: boolean;
   onSchemesChange?: (schemes: SchemeRecord[]) => void;
   onEdit?: (id: number) => void;
   network?: string;
@@ -77,6 +78,7 @@ export const createMonitoringSchemeQueryState =
 
 const SchemeQuery: React.FC<SchemeQueryProps> = ({
   schemes: externalSchemes,
+  active = true,
   onSchemesChange,
   onEdit,
   network = NETWORK_NAME,
@@ -98,6 +100,8 @@ const SchemeQuery: React.FC<SchemeQueryProps> = ({
 
   const [highlightLayer, setHighlightLayer] =
     useState<VectorLayer<VectorSource> | null>(null);
+  const activeRef = useRef(active);
+  activeRef.current = active;
   const [highlightFeatures, setHighlightFeatures] = useState<Feature[]>([]);
   // 使用外部提供的 schemes 或内部状态
   const schemes =
@@ -142,6 +146,7 @@ const SchemeQuery: React.FC<SchemeQueryProps> = ({
         queryable: false,
       },
     });
+    highlightLayer.setVisible(activeRef.current);
 
     map.addLayer(highlightLayer);
     setHighlightLayer(highlightLayer);
@@ -151,6 +156,10 @@ const SchemeQuery: React.FC<SchemeQueryProps> = ({
     };
   }, [map]);
 
+  useEffect(() => {
+    highlightLayer?.setVisible(active);
+  }, [active, highlightLayer]);
+
   // 高亮要素的函数
   useEffect(() => {
     if (!highlightLayer) {
diff --git a/src/components/olmap/MonitoringPlaceOptimization/engineeringDrawing.test.ts b/src/components/olmap/MonitoringPlaceOptimization/engineeringDrawing.test.ts
index cc18913..42dc0b4 100644
--- a/src/components/olmap/MonitoringPlaceOptimization/engineeringDrawing.test.ts
+++ b/src/components/olmap/MonitoringPlaceOptimization/engineeringDrawing.test.ts
@@ -107,6 +107,7 @@ const point = (
   map_y: number,
 ): SensorPointRow => ({
   node_id,
+  max_pipe_diameter: 300,
   sequence,
   map_x,
   map_y,
diff --git a/src/components/olmap/MonitoringPlaceOptimization/schemeApi.ts b/src/components/olmap/MonitoringPlaceOptimization/schemeApi.ts
index 1428e13..f73f3e2 100644
--- a/src/components/olmap/MonitoringPlaceOptimization/schemeApi.ts
+++ b/src/components/olmap/MonitoringPlaceOptimization/schemeApi.ts
@@ -3,6 +3,7 @@ import { config } from "@/config/config";
 import type {
   AdjustmentStatus,
   SensorPlacementScheme,
+  SensorPoint,
 } from "./types";
 
 export interface OptimizeSchemeInput {
@@ -32,6 +33,15 @@ export const getSensorPlacementScheme = async (
   return response.data;
 };
 
+export const getSensorPlacementCandidate = async (
+  nodeId: string,
+): Promise<SensorPoint> => {
+  const response = await api.get<SensorPoint>(
+    `${config.BACKEND_URL}/api/v1/sensor-placement-candidates/${encodeURIComponent(nodeId)}`,
+  );
+  return response.data;
+};
+
 export const overwriteSensorPlacementScheme = async (
   schemeId: number,
   expectedSensorLocation: string[],
diff --git a/src/components/olmap/MonitoringPlaceOptimization/schemeEditor.test.ts b/src/components/olmap/MonitoringPlaceOptimization/schemeEditor.test.ts
index f26cd6d..b0c62b6 100644
--- a/src/components/olmap/MonitoringPlaceOptimization/schemeEditor.test.ts
+++ b/src/components/olmap/MonitoringPlaceOptimization/schemeEditor.test.ts
@@ -13,6 +13,7 @@ import type { SensorPlacementScheme, SensorPoint } from "./types";
 
 const point = (node_id: string): SensorPoint => ({
   node_id,
+  max_pipe_diameter: 300,
   project_x: Number(node_id.slice(1)) * 10,
   project_y: Number(node_id.slice(1)) * 20,
   map_x: 13500000 + Number(node_id.slice(1)) * 10,
diff --git a/src/components/olmap/MonitoringPlaceOptimization/types.ts b/src/components/olmap/MonitoringPlaceOptimization/types.ts
index 1c3b058..38e0984 100644
--- a/src/components/olmap/MonitoringPlaceOptimization/types.ts
+++ b/src/components/olmap/MonitoringPlaceOptimization/types.ts
@@ -2,6 +2,7 @@ export type AdjustmentStatus = "current" | "original" | "added" | "replaced";
 
 export interface SensorPoint {
   node_id: string;
+  max_pipe_diameter: number | null;
   project_x: number;
   project_y: number;
   map_x: number;
diff --git a/src/generated/serverApi.ts b/src/generated/serverApi.ts
index 611f8ce..c0737cd 100644
--- a/src/generated/serverApi.ts
+++ b/src/generated/serverApi.ts
@@ -4833,6 +4833,23 @@ export interface paths {
         patch?: never;
         trace?: never;
     };
+    "/api/v1/sensor-placement-candidates/{node_id}": {
+        parameters: {
+            query?: never;
+            header?: never;
+            path?: never;
+            cookie?: never;
+        };
+        /** 获取监测点候选节点详情 */
+        get: operations["get_sensor_placement_candidates_node_id"];
+        put?: never;
+        post?: never;
+        delete?: never;
+        options?: never;
+        head?: never;
+        patch?: never;
+        trace?: never;
+    };
     "/api/v1/sensor-placement-optimization-runs": {
         parameters: {
             query?: never;
@@ -8153,6 +8170,11 @@ export interface components {
             map_x: number;
             /** Map Y */
             map_y: number;
+            /**
+             * Max Pipe Diameter
+             * @description 节点关联管道的最大管径，单位：毫米
+             */
+            max_pipe_diameter: number | null;
             /** Node Id */
             node_id: string;
             /** Project X */
@@ -31651,6 +31673,84 @@ export interface operations {
             };
         };
     };
+    get_sensor_placement_candidates_node_id: {
+        parameters: {
+            query?: never;
+            header: {
+                "X-Project-Id": string;
+            };
+            path: {
+                node_id: string;
+            };
+            cookie?: never;
+        };
+        requestBody?: never;
+        responses: {
+            /** @description Successful Response */
+            200: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["SensorPointResponse"];
+                };
+            };
+            /** @description Authentication required */
+            401: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["ProblemDetails"];
+                };
+            };
+            /** @description Insufficient permission */
+            403: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["ProblemDetails"];
+                };
+            };
+            /** @description Resource not found */
+            404: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["ProblemDetails"];
+                };
+            };
+            /** @description Resource conflict */
+            409: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["ProblemDetails"];
+                };
+            };
+            /** @description Validation error */
+            422: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["ProblemDetails"];
+                };
+            };
+            /** @description Dependency unavailable */
+            503: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["ProblemDetails"];
+                };
+            };
+        };
+    };
     post_sensor_placement_optimization_runs: {
         parameters: {
             query?: never;