diff --git a/ruoyi-ems/src/main/java/org/dromara/ems/report/domain/vo/vibrationboard/VibrationQualityPageVo.java b/ruoyi-ems/src/main/java/org/dromara/ems/report/domain/vo/vibrationboard/VibrationQualityPageVo.java
index 0cc4cc4..3df18f4 100644
--- a/ruoyi-ems/src/main/java/org/dromara/ems/report/domain/vo/vibrationboard/VibrationQualityPageVo.java
+++ b/ruoyi-ems/src/main/java/org/dromara/ems/report/domain/vo/vibrationboard/VibrationQualityPageVo.java
@@ -24,6 +24,18 @@ public class VibrationQualityPageVo {
     /** 总覆盖率，与总览页复用同一计算逻辑保证数值一致 */
     private BigDecimal coverageRate;
 
+    /** 位移有效样本数，供位移专属质量页直接展示 */
+    private Integer validCount;
+
+    /** 位移无效样本数，便于快速识别缺采规模 */
+    private Integer invalidCount;
+
+    /** 位移有效率，本轮与 coverageRate 保持同一口径 */
+    private BigDecimal validRate;
+
+    /** 位移无效率 = invalidCount / sampleCount */
+    private BigDecimal invalidRate;
+
     /** 各振动指标的独立有效采集率，拆到每个维度便于发现“某类传感器批量失效” */
     private List<MetricQualityItem> metricQualityItems;
 
diff --git a/ruoyi-ems/src/main/java/org/dromara/ems/report/mapper/VibrationBoardMapper.java b/ruoyi-ems/src/main/java/org/dromara/ems/report/mapper/VibrationBoardMapper.java
index 6e2ab2c..002c92b 100644
--- a/ruoyi-ems/src/main/java/org/dromara/ems/report/mapper/VibrationBoardMapper.java
+++ b/ruoyi-ems/src/main/java/org/dromara/ems/report/mapper/VibrationBoardMapper.java
@@ -41,4 +41,26 @@ public interface VibrationBoardMapper {
      */
     List<RecordIotenvInstant> selectSampledData(@Param("tableNames") List<String> tableNames,
                                                 @Param("query") VibrationBoardQueryBo query);
+
+    /**
+     * 查询位移质量页原始样本。
+     * <p>与分析类页面不同，这里不能提前按位移有效值过滤，
+     * 否则 sampleCount 会被错误缩小，导致质量页覆盖率虚高。</p>
+     *
+     * @param tableNames 已经通过白名单正则校验的日分表名列表
+     * @param query      查询参数（时间范围、设备列表、抽样间隔）
+     */
+    List<RecordIotenvInstant> selectQualityRawData(@Param("tableNames") List<String> tableNames,
+                                                   @Param("query") VibrationBoardQueryBo query);
+
+    /**
+     * 查询位移质量页抽样样本。
+     * <p>当抽样间隔 > 1 时仍在 DB 层完成降采样，但不会提前按位移有效值过滤，
+     * 以保证质量页分母口径稳定。</p>
+     *
+     * @param tableNames 已经通过白名单正则校验的日分表名列表
+     * @param query      查询参数（时间范围、设备列表、抽样间隔）
+     */
+    List<RecordIotenvInstant> selectQualitySampledData(@Param("tableNames") List<String> tableNames,
+                                                       @Param("query") VibrationBoardQueryBo query);
 }
diff --git a/ruoyi-ems/src/main/resources/mapper/ems/report/VibrationBoardMapper.xml b/ruoyi-ems/src/main/resources/mapper/ems/report/VibrationBoardMapper.xml
index 4dc7a88..c8f8ec1 100644
--- a/ruoyi-ems/src/main/resources/mapper/ems/report/VibrationBoardMapper.xml
+++ b/ruoyi-ems/src/main/resources/mapper/ems/report/VibrationBoardMapper.xml
@@ -100,6 +100,28 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         </choose>
     </sql>
 
+    <!--
+        质量页 WHERE 条件：
+        1. 仍按时间范围与设备范围筛选
+        2. 不在 SQL 层提前过滤位移有效值
+        这样 sampleCount 才能代表“质量统计样本总数”，不会被有效值条件提前缩小。
+    -->
+    <sql id="baseWhereQuality">
+        t.recodeTime &gt;= #{query.beginRecordTime}
+        AND t.recodeTime &lt;= #{query.endRecordTime}
+        <choose>
+            <when test="query.monitorId != null and query.monitorId != ''">
+                AND t.monitorId = #{query.monitorId}
+            </when>
+            <when test="query.monitorIds != null and query.monitorIds.size() > 0">
+                AND t.monitorId IN
+                <foreach collection="query.monitorIds" item="monitorId" open="(" separator="," close=")">
+                    #{monitorId}
+                </foreach>
+            </when>
+        </choose>
+    </sql>
+
     <!--
         原始查询：UNION ALL 多日分表 → 子查询 → 排序。
         INNER JOIN monitor_type = 10 确保只查振动设备——这是「振动报表独立口径」的 SQL 层保障。
@@ -184,6 +206,82 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         ORDER BY monitorId ASC, recodeTime ASC, objid ASC
     </sql>
 
+    <!--
+        质量页原始查询：与分析类查询不同，这里不按位移有效值过滤，
+        保证质量页分母代表“本次查询实际采到的样本数”。
+    -->
+    <sql id="rawQualityQuery">
+        SELECT *
+        FROM (
+            <foreach collection="tableNames" item="tableName" separator=" UNION ALL ">
+                SELECT
+                    <include refid="selectColumns"/>
+                FROM ${tableName} t
+                INNER JOIN ems_base_monitor_info ebmi
+                    ON t.monitorId = ebmi.monitor_code
+                    AND ebmi.monitor_type = 10
+                <where>
+                    <include refid="baseWhereQuality"/>
+                </where>
+            </foreach>
+        ) vibration_quality_data
+        ORDER BY vibration_quality_data.monitorId ASC, vibration_quality_data.recodeTime ASC, vibration_quality_data.objid ASC
+    </sql>
+
+    <!--
+        质量页抽样查询：仅做时间桶抽样，不做位移有效值过滤，
+        避免质量统计在 SQL 层被“分析口径”提前污染。
+    -->
+    <sql id="samplingQualityQuery">
+        WITH sampled AS (
+            <foreach collection="tableNames" item="tableName" separator=" UNION ALL ">
+                SELECT
+                    <include refid="selectColumns"/>,
+                    ROW_NUMBER() OVER (
+                        PARTITION BY t.monitorId,
+                        <choose>
+                            <when test="_databaseId == 'mysql'">
+                                CAST(TIMESTAMPDIFF(MINUTE, '2000-01-01 00:00:00', t.recodeTime) / #{query.samplingInterval} AS SIGNED)
+                            </when>
+                            <when test="_databaseId == 'postgresql' or _databaseId == 'PostgreSQL'">
+                                CAST(EXTRACT(EPOCH FROM (t.recodeTime - TIMESTAMP '2000-01-01 00:00:00')) / 60 / #{query.samplingInterval} AS BIGINT)
+                            </when>
+                            <otherwise>
+                                CAST(DATEDIFF(MINUTE, '2000-01-01 00:00:00', t.recodeTime) / #{query.samplingInterval} AS BIGINT)
+                            </otherwise>
+                        </choose>
+                        ORDER BY t.recodeTime DESC, t.objid DESC
+                    ) AS rn
+                FROM ${tableName} t
+                INNER JOIN ems_base_monitor_info ebmi
+                    ON t.monitorId = ebmi.monitor_code
+                    AND ebmi.monitor_type = 10
+                <where>
+                    <include refid="baseWhereQuality"/>
+                </where>
+            </foreach>
+        )
+        SELECT
+            objid,
+            monitorId,
+            monitor_code,
+            monitor_name,
+            temperature,
+            humidity,
+            illuminance,
+            noise,
+            concentration,
+            vibration_speed,
+            vibration_displacement,
+            vibration_acceleration,
+            vibration_temp,
+            collectTime,
+            recodeTime
+        FROM sampled
+        WHERE rn = 1
+        ORDER BY monitorId ASC, recodeTime ASC, objid ASC
+    </sql>
+
     <!-- 原始明细查询入口（samplingInterval <= 1 时使用） -->
     <select id="selectRawData" resultMap="VibrationBoardResult">
         <include refid="rawPageQuery"/>
@@ -193,4 +291,14 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
     <select id="selectSampledData" resultMap="VibrationBoardResult">
         <include refid="samplingPageQuery"/>
     </select>
+
+    <!-- 质量页原始样本查询入口（samplingInterval <= 1 时使用） -->
+    <select id="selectQualityRawData" resultMap="VibrationBoardResult">
+        <include refid="rawQualityQuery"/>
+    </select>
+
+    <!-- 质量页抽样样本查询入口（samplingInterval > 1 时使用） -->
+    <select id="selectQualitySampledData" resultMap="VibrationBoardResult">
+        <include refid="samplingQualityQuery"/>
+    </select>
 </mapper>