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  <front>
    <journal-meta>
      <journal-id journal-id-type="publisher-id">ms</journal-id>
      <journal-title-group>
        <journal-title>Material Sciences</journal-title>
      </journal-title-group>
      <issn pub-type="epub">2160-7621</issn>
      <issn pub-type="ppub">2160-7613</issn>
      <publisher>
        <publisher-name>汉斯出版社</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="doi">10.12677/ms.2025.1512227</article-id>
      <article-id pub-id-type="publisher-id">ms-130631</article-id>
      <article-categories>
        <subj-group>
          <subject>Article</subject>
        </subj-group>
        <subj-group>
          <subject>化学与材料</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>基于稳态热流计法的低导热材料检测装备的 研发、技术优化与稳定性验证</article-title>
        <trans-title-group xml:lang="en">
          <trans-title>R&amp;D, Technical Optimization and Stability Verification of Testing Equipment for Low Thermal Conductivity Materials Based on Steady-State Heat Flow Meter Method</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>江</surname>
            <given-names>正林</given-names>
          </name>
          <xref ref-type="aff" rid="aff1">1</xref>
        </contrib>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>韩</surname>
            <given-names>子豪</given-names>
          </name>
          <xref ref-type="aff" rid="aff2">2</xref>
        </contrib>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>杨</surname>
            <given-names>亮</given-names>
          </name>
          <xref ref-type="aff" rid="aff2">2</xref>
        </contrib>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>韩</surname>
            <given-names>锋钢</given-names>
          </name>
          <xref ref-type="aff" rid="aff3">3</xref>
        </contrib>
      </contrib-group>
      <aff id="aff1"><label>1</label> 福建赛特新材股份有限公司，福建 龙岩 </aff>
      <aff id="aff2"><label>2</label> 厦门理工学院材料科学与工程学院，福建 厦门 </aff>
      <aff id="aff3"><label>3</label> 厦门理工学院机械与汽车工程学院，福建 厦门 </aff>
      <pub-date pub-type="epub">
        <day>02</day>
        <month>12</month>
        <year>2025</year>
      </pub-date>
      <pub-date pub-type="collection">
        <month>12</month>
        <year>2025</year>
      </pub-date>
      <volume>15</volume>
      <issue>12</issue>
      <fpage>2139</fpage>
      <lpage>2146</lpage>
      <history>
        <date date-type="received">
          <day>10</day>
          <month>11</month>
          <year>2025</year>
        </date>
        <date date-type="accepted">
          <day>03</day>
          <month>12</month>
          <year>2025</year>
        </date>
        <date date-type="published">
          <day>15</day>
          <month>12</month>
          <year>2025</year>
        </date>
      </history>
      <permissions>
        <copyright-statement>© 2025 Hans Publishers Inc. All rights reserved.</copyright-statement>
        <copyright-year>2025</copyright-year>
        <license license-type="open-access">
          <license-p> This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( <ext-link ext-link-type="uri" xlink:href="https://creativecommons.org/licenses/by/4.0/">https://creativecommons.org/licenses/by/4.0/</ext-link> ). </license-p>
        </license>
      </permissions>
      <self-uri content-type="doi" xlink:href="https://doi.org/10.12677/ms.2025.1512227">https://doi.org/10.12677/ms.2025.1512227</self-uri>
      <abstract>
        <p>针对真空绝热板(VIP)等低导热材料(1~50 mW/(m·K))检测中测厚误差大、材料特性干扰显著及进口设备成本高的问题，本文研发了ST-500型稳态热流计法检测装备。通过优化测厚系统(解决上下板水平偏差、升降机冲击等4项关键问题)，测厚标准差降至≤0.017 mm；结合高灵敏度热流计(EKOHF-30S)与Pt100热电阻，实现控温精度±0.05℃、检测准确度±2%。通过3种规格VIP板(硬质349 × 504 × 13.80 mm、中软质300 × 300 × 12.25 mm、软质290 × 400 × 7.25 mm)进行验证：硬质板两种装载方式导热系数误差 ≤ 0.1 mW/(m·K)，软质板“不取出”时厚度衰减0.13 mm (需优先“取出”装载)。与进口耐驰HFM446对比，ST-500重复性更优(测厚标准差0.01 mm vs 0.013 mm)，成本仅为进口设备的1/2，满足GB/T 10295-2008标准，推动了低导热材料检测设备的国产化替代。</p>
      </abstract>
      <trans-abstract xml:lang="en">
        <p>Aiming at the problems of large thickness measurement error, significant interference from material properties, and high cost of imported equipment in the testing of low thermal conductivity materials (1~50 mW/(m·K)) such as vacuum insulation panels (VIPs), the ST-500 testing equipment based on the steady-state heat flow meter method was developed in this paper. By optimizing the thickness measurement system (solving 4 key issues, including horizontal deviation of upper and lower plates and elevator impact), the standard deviation of thickness measurement was reduced to ≤0.017 mm. Combined with a high-sensitivity heat flux meter (EKOHF-30S) and a Pt100 thermistor, the equipment achieved a temperature control accuracy of ±0.05˚C and a detection accuracy of ±2%. Verification was conducted with 3 types of VIP panels (hard: 349 × 504 × 13.80 mm, medium-soft: 300 × 300 × 12.25 mm, soft: 290 × 400 × 7.25 mm). The results showed that the thermal conductivity error of hard panels under two loading methods was ≤0.1 mW/(m·K), while the thickness of soft panels attenuated by 0.13 mm when using the “non-removal” loading method (the “removal” loading method should be prioritized). Compared with the imported Netzsch HFM446, the ST-500 had better repeatability (thickness measurement standard deviation: 0.01 mm vs 0.013 mm) and its cost was only 1/2 of that of imported equipment. It meets the GB/T 10295-2008 standard and can promote the localization replacement of testing equipment for low thermal conductivity materials.</p>
      </trans-abstract>
      <kwd-group kwd-group-type="author-generated" xml:lang="zh">
        <kwd>稳态热流计法</kwd>
        <kwd>设备研发</kwd>
        <kwd>低导热材料</kwd>
        <kwd>VIP板</kwd>
        <kwd>检测精度</kwd>
      </kwd-group>
      <kwd-group kwd-group-type="author-generated" xml:lang="en">
        <kwd>Steady-State Heat Flow Meter Method</kwd>
        <kwd>Equipment R&amp;D</kwd>
        <kwd>Low Thermal Conductivity Materials</kwd>
        <kwd>VIP Panels</kwd>
        <kwd>Detection Accuracy</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body>
    <sec id="sec1">
      <title>1. 引言</title>
      <p>导热系数(<italic>λ</italic>)是低导热材料(如VIP板)性能评价的核心指标，其检测精度直接影响建筑节能、家电制造及冷链物流等领域的应用效果[<xref ref-type="bibr" rid="B1">1</xref>][<xref ref-type="bibr" rid="B2">2</xref>]。当前主流的稳态热流计法检测存在三大痛点：一是国产设备测厚系统精度不足(误差0.3~1.39 mm)，难以适配超薄VIP (&lt;5 mm)；二是软质VIP因连续测试压缩变形(厚度衰减 &gt; 0.1 mm)，导热系数偏差达5%~8%；三是进口设备(如耐驰HFM446)成本超70万元，中小企业难以承担[<xref ref-type="bibr" rid="B3">3</xref>][<xref ref-type="bibr" rid="B4">4</xref>]。此前研发的ST-500型装备虽实现基础精度与成本优势，但未系统解决测厚误差及材料特性干扰问题。本文通过优化测厚系统、验证多规格VIP板检测性能，完善装备适配性，填补国产装备在低导热材料精准检测领域的空白。</p>
    </sec>
    <sec id="sec2">
      <title>2. ST-500型稳态热流计法检测装备设计与核心组件</title>
      <p>ST-500型装备采用“五模块协同”模块化架构，各模块功能独立且通过以太网私有协议互联，实现“样品定位–参数采集–稳态判断–数据输出”全流程自动化，模块包括测量模块、数据采集系统、恒温冷热板模块、机械辅助机构及数据计算模块[<xref ref-type="bibr" rid="B5">5</xref>][<xref ref-type="bibr" rid="B6">6</xref>]。装备外观如<xref ref-type="fig" rid="fig1">图1</xref>所示，整体设计简洁，操作区域布局清晰，便于工业场景下的日常使用。</p>
      <fig id="fig1">
        <label>Figure 1</label>
        <graphic xlink:href="https://html.hanspub.org/file/1282071-rId14.jpeg?20251215103751" />
      </fig>
      <p><bold>Figure 1.</bold>Overall structure diagram</p>
      <p><bold>图</bold><bold>1</bold><bold>.</bold>整机结构图</p>
      <sec id="sec2dot1">
        <title>2.1. 核心技术参数</title>
        <p>针对低导热材料检测需求，装备核心参数兼顾精度与兼容性，关键指标如表1所示，其中测厚精度、控温性能较同类国产设备提升30%以上[<xref ref-type="bibr" rid="B7">7</xref>]。</p>
        <p><bold>Table 1.</bold> Critical technical parameters of ST-500 low thermal conductivity material testing equipment</p>
        <p><bold>表</bold><bold>1</bold><bold>.</bold> ST-500低导热材料检测装备核心技术参数</p>
        <table-wrap id="tbl1">
          <label>Table 1</label>
          <table>
            <tbody>
              <tr>
                <td>参数类别</td>
                <td>参数名称</td>
                <td>数值/范围</td>
                <td>备注</td>
              </tr>
              <tr>
                <td rowspan="2">样品适配</td>
                <td>厚度范围</td>
                <td>5~100 mm(可扩至150 mm)</td>
                <td>
                  适配主流VIP规格[
                  <xref ref-type="bibr" rid="B8">8</xref>
                  ]
                </td>
              </tr>
              <tr>
                <td>长宽范围</td>
                <td>宽度300~500 mm，长度 ≥ 300 mm</td>
                <td>-</td>
              </tr>
              <tr>
                <td rowspan="2">温控系统</td>
                <td>工作温度</td>
                <td>5~60℃</td>
                <td>冷热板独立控温</td>
              </tr>
              <tr>
                <td>控温精度</td>
                <td>±0.05℃</td>
                <td>双闭环PID控制</td>
              </tr>
              <tr>
                <td rowspan="2">检测精度</td>
                <td>导热系数量程</td>
                <td>1~50 mW/(m∙K)</td>
                <td>
                  适配VIP、气凝胶等[
                  <xref ref-type="bibr" rid="B9">9</xref>
                  ]
                </td>
              </tr>
              <tr>
                <td>检测准确度/重复性</td>
                <td>±2%/±1%</td>
                <td>
                  对标GB/T 10295-2008 [
                  <xref ref-type="bibr" rid="B10">10</xref>
                  ]
                </td>
              </tr>
              <tr>
                <td rowspan="3">核心部件性能</td>
                <td>热流计分辨率</td>
                <td>
                  0.15 W/m
                  <sup>2</sup>
                </td>
                <td>
                  EKOHF-30S，灵敏度 ≥ 100 μV∙m
                  <sup>2</sup>
                  /W
                </td>
              </tr>
              <tr>
                <td>拉绳编码器分辨率</td>
                <td>0.025 mm/脉冲</td>
                <td>MPS-S-0505-20Z2-LG</td>
              </tr>
              <tr>
                <td>测厚标准差</td>
                <td>≤0.017 mm</td>
                <td>
                  优化后，A4纸10次测试[
                  <xref ref-type="bibr" rid="B11">11</xref>
                  ]
                </td>
              </tr>
            </tbody>
          </table>
        </table-wrap>
      </sec>
      <sec id="sec2dot2">
        <title>2.2. 关键部件设计</title>
        <p>测量模块负责温度、压力、热流及厚度采集，核心部件选型与布置如下：温度测量采用8路Pt100热电阻(2.3 mm × 2.1 mm × 0.9 mm)，每块恒温板布置4个(<xref ref-type="fig" rid="fig2">图2</xref>)，通过西门子SM1231RTD模块采集，温度误差 ≤ ±0.2℃(Pt1000，4个，变送器转换为4~20 Ma信号)；压力测量选用GYSA-200KG压力传感器(输出0~24 mV)，确保夹紧压力稳定0.1 MPa (软质样品可降至0.05 MPa) (无夹紧力控制)；热流测量采用2路EKOHF-30S薄膜热流计(85 × 85 mm)，贴附于恒温板表面，通过SM1231模拟量模块采集电压信号(使用进口热通量专用采集模块进行采集)，满足低导热材料热流分辨率需求；厚度测量采用MPS-S-0505-20Z2-LG拉绳编码器，通过脉冲数计算样品厚度(4~20 Ma信号)，优化后测厚误差 ≤ ±0.02 mm。</p>
        <p>恒温冷热板是装备控温核心，其中恒温热板采用紫铜板(厚度10 mm，<italic>λ</italic> = 386 W/(m∙K))，内置6片1500 W电加热片(单片，1000 W加热膜)，外侧包裹50 mm聚氨酯保温层(<italic>λ</italic> ≤ 0.024 W/(m∙K))，确保表面温度均匀性；恒温冷板采用铝合金板(厚度12 mm，<italic>λ</italic> = 202 W/(m∙K))，内置水冷通道(流量2 L/min)，冷却液为30%乙二醇水溶液，吸收热流维持温度稳定(10℃ ± 0.05℃)通过半导体制冷片对冷板温度进行控制，水冷通道用于半导体制冷片散热。</p>
        <p>数据计算模块以西门子S7-1200PLC为核心，通过以太网与计算机通信：PLC采集传感器信号并计算导热系数，计算机通过WINCC组态自研上位机软件显示参数(温度、热流、导热系数)、存储数据及生成报表，稳态判断采用“双重标准”——热流连续30 min波动 &lt; ±1.5%且5次导热系数差值 ≤ ±1%，确保结果可靠[<xref ref-type="bibr" rid="B12">12</xref>][<xref ref-type="bibr" rid="B13">13</xref>]。</p>
        <fig id="fig2">
          <label>Figure 2</label>
          <graphic xlink:href="https://html.hanspub.org/file/1282071-rId15.jpeg?20251215103752" />
        </fig>
        <fig id="fig3">
          <label>Figure 3</label>
          <graphic xlink:href="https://html.hanspub.org/file/1282071-rId16.jpeg?20251215103752" />
        </fig>
        <p><bold>Fig</bold><bold>ure</bold><bold>2.</bold>Flux sensor diagram</p>
        <p><bold>图</bold><bold>2</bold><bold>.</bold> 通量传感器图</p>
      </sec>
    </sec>
    <sec id="sec3">
      <title>3. 关键技术优化</title>
      <sec id="sec3dot1">
        <title>3.1. 测厚系统优化</title>
        <p>针对原测厚系统4项核心问题，通过机械调整与程序优化提升精度，具体措施与效果如表2所示[<xref ref-type="bibr" rid="B14">14</xref>][<xref ref-type="bibr" rid="B15">15</xref>]。优化后，2 mm A4纸10次测厚标准差从0.08 mm降至0.01 mm，满足低导热材料检测需求。</p>
        <p><bold>Table</bold><bold>2.</bold>Optimization measures for the thickness measurement system of ST-500 low thermal conductivity material testing equipment</p>
        <p><bold>表</bold><bold>2</bold><bold>.</bold> ST-500低导热材料检测装备测厚系统优化措施</p>
        <table-wrap id="tbl2">
          <label>Table 2</label>
          <table>
            <tbody>
              <tr>
                <td>序号</td>
                <td>存在问题</td>
                <td>改善措施</td>
                <td>优化后效果</td>
              </tr>
              <tr>
                <td>1</td>
                <td>上下板水平度偏差(0.08 mm/m)</td>
                <td>水平尺辅助调整支撑螺钉与升降电机高度，确保水平度误差 &lt; 0.01 mm/m</td>
                <td>2 mm A4纸测厚偏差0.01 mm</td>
              </tr>
              <tr>
                <td>2</td>
                <td>升降机下降冲击(速率5 mm/s)</td>
                <td>
                  PLC程序降速至1 mm/s，增加5 mm减速缓冲段[
                  <xref ref-type="bibr" rid="B16">16</xref>
                  ]
                </td>
                <td>无冲击变形，12 mm VIP测厚偏差0.005 mm</td>
              </tr>
              <tr>
                <td>3</td>
                <td>无零点校准功能</td>
                <td>新增手动校准入口，上下板贴合后自动归零</td>
                <td>校准后偏差 &lt; 0.01 mm</td>
              </tr>
              <tr>
                <td>4</td>
                <td>连续测试厚度继承误差(0.03 mm)</td>
                <td>
                  新增清零模块，每次测试前复位编码器[
                  <xref ref-type="bibr" rid="B17">17</xref>
                  ]
                </td>
                <td>连续5次测试无继承误差</td>
              </tr>
            </tbody>
          </table>
        </table-wrap>
      </sec>
      <sec id="sec3dot2">
        <title>3.2. 热流信号与稳态优化</title>
        <p>热流信号优化采用硬件屏蔽与软件滤波结合的方式：热流计信号线采用双绞屏蔽线(接地)，与动力线间距 &gt; 100 mm，减少电磁干扰；软件采用自适应滑动平均滤波，噪声抑制率从50%提升至71.7%，2 mm A4纸热流波动从0.03 mV降至0.008 mV [<xref ref-type="bibr" rid="B18">18</xref>]。稳态时间优化方面，通过“双重稳态标准”缩短测试效率，优化后VIP板稳态时间从2.5 h降至1.7 h，效率提升32%。</p>
      </sec>
    </sec>
    <sec id="sec4">
      <title>4. 低导热材料检测实验验证</title>
      <p>实验环境控制为温度25 ± 1℃、相对湿度50 ± 5%，所有VIP样品经80℃真空干燥24 h消除水分影响，重点验证装备精度、与同类设备对比及材料特性影响[<xref ref-type="bibr" rid="B19">19</xref>][<xref ref-type="bibr" rid="B20">20</xref>]。</p>
      <sec id="sec4dot1">
        <title>4.1. 基础性能验证</title>
        <p>对3种VIP板重复测试10次，结果如表3所示：厚度波动率 ≤ 0.46%，导热系数波动率 ≤ 0.96%，热流波动 ≤ 0.027 mV，均满足GB/T 10295-2008标准，证明装备稳定性良好[<xref ref-type="bibr" rid="B21">21</xref>][<xref ref-type="bibr" rid="B22">22</xref>]。</p>
        <p><bold>Table 3.</bold> Basic performance verification data of ST-500 low thermal conductivity material testing equipment (n = 10)</p>
        <p><bold>表</bold><bold>3</bold><bold>.</bold> ST-500低导热材料检测装备基础性能验证数据(n = 10)</p>
        <table-wrap id="tbl3">
          <label>Table 3</label>
          <table>
            <tbody>
              <tr>
                <td>样品类型</td>
                <td>规格(mm)</td>
                <td>厚度范围(mm)</td>
                <td>厚度波动率(%)</td>
                <td>导热系数范围(mW/(m∙K))</td>
                <td>导热系数波动率(%)</td>
              </tr>
              <tr>
                <td>硬质VIP (留样室)</td>
                <td>349 × 504 × 13.80</td>
                <td>13.76~13.78</td>
                <td>0.14</td>
                <td>4.296~4.371</td>
                <td>1.70</td>
              </tr>
              <tr>
                <td>中软质VIP (惠而浦)</td>
                <td>300 × 300 × 12.25</td>
                <td>12.13~12.24</td>
                <td>0.89</td>
                <td>2.484~2.529</td>
                <td>1.85</td>
              </tr>
              <tr>
                <td>软质VIP (大货)</td>
                <td>290 × 400 × 7.25</td>
                <td>7.05~7.20</td>
                <td>2.08</td>
                <td>5.683~5.753</td>
                <td>1.20</td>
              </tr>
            </tbody>
          </table>
        </table-wrap>
      </sec>
      <sec id="sec4dot2">
        <title>4.2. 与同类装备对比</title>
        <p>将ST-500与国产HR-303、进口耐驰HFM446对比(样品：300 × 300 × 12 mm惠而浦VIP)，结果如表4所示：ST-500导热系数偏差仅0.84% (vs耐驰)，成本仅为进口设备的1/2，性价比优势显著；虽测厚绝对值与耐驰存在0.45 mm偏差(源于压力差异：ST-500 0.1 MPa vs耐驰0.3 MPa)，但重复性更优(标准差0.01 mm vs 0.013 mm) [<xref ref-type="bibr" rid="B23">23</xref>][<xref ref-type="bibr" rid="B24">24</xref>]。</p>
        <p><bold>Table 4.</bold>Comparison data between ST-500 and similar technology equipment</p>
        <p><bold>表</bold><bold>4</bold><bold>.</bold> ST-500与同类装备对比数据</p>
        <table-wrap id="tbl4">
          <label>Table 4</label>
          <table>
            <tbody>
              <tr>
                <td>装备类型</td>
                <td>测厚标准差(mm)</td>
                <td>导热系数均值(mW/(m∙K))</td>
                <td>导热系数偏差(vs耐驰)</td>
                <td>控温精度(℃)</td>
                <td>成本(万元)</td>
                <td>测试时间(h)</td>
              </tr>
              <tr>
                <td>ST-500(本研究)</td>
                <td>0.01</td>
                <td>2.35</td>
                <td>−0.84%</td>
                <td>±0.05</td>
                <td>60~80</td>
                <td>1.7</td>
              </tr>
              <tr>
                <td>国产HR-303</td>
                <td>0.03</td>
                <td>2.42</td>
                <td>−2.11%</td>
                <td>±0.10</td>
                <td>80~100</td>
                <td>1.8</td>
              </tr>
              <tr>
                <td>进口耐驰HFM446</td>
                <td>0.013</td>
                <td>2.37</td>
                <td>0.00%</td>
                <td>±0.02</td>
                <td>220~250</td>
                <td>1.5</td>
              </tr>
            </tbody>
          </table>
        </table-wrap>
      </sec>
      <sec id="sec4dot3">
        <title>4.3. 材料特性与装载方式影响</title>
        <p>对3种VIP板采用“取出”(测试后重新装载)与“不取出”(连续测试)两种方式，结果如表5所示：硬质板两种方式厚度误差 ≤ 0.02 mm，导热系数差值0.055 mW/(m∙K)，源于“不取出”时样品残留热量，可任选装载方式；中软质板“不取出”时厚度从12.17 mm降至12.13 mm，衰减0.04 mm，导热系数相应降低；软质板“不取出”时厚度衰减0.13 mm，导热系数波动幅度是硬质板的3.2倍，需优先“取出”装载以避免变形干扰[<xref ref-type="bibr" rid="B25">25</xref>][<xref ref-type="bibr" rid="B26">26</xref>]。</p>
        <p><bold>Table 5.</bold> Comparison of test results for different loading methods of VIP panels</p>
        <p><bold>表</bold><bold>5</bold><bold>.</bold> 不同VIP板装载方式测试结果对比</p>
        <table-wrap id="tbl5">
          <label>Table 5</label>
          <table>
            <tbody>
              <tr>
                <td>样品类型</td>
                <td>装载方式</td>
                <td>厚度范围(mm)</td>
                <td>导热系数范围(mW/(m∙K))</td>
                <td>厚度衰减(mm)</td>
              </tr>
              <tr>
                <td rowspan="2">硬质VIP</td>
                <td>取出</td>
                <td>13.76~13.78</td>
                <td>4.296~4.327</td>
                <td>0.00</td>
              </tr>
              <tr>
                <td>不取出</td>
                <td>13.76~13.78</td>
                <td>4.363~4.371</td>
                <td>0.00</td>
              </tr>
              <tr>
                <td rowspan="2">中软质VIP</td>
                <td>取出</td>
                <td>12.24~12.24</td>
                <td>2.505~2.529</td>
                <td>0.00</td>
              </tr>
              <tr>
                <td>不取出</td>
                <td>12.13~12.17</td>
                <td>2.484~2.498</td>
                <td>0.04</td>
              </tr>
              <tr>
                <td rowspan="2">软质VIP</td>
                <td>取出</td>
                <td>7.18~7.20</td>
                <td>5.683~5.751</td>
                <td>0.00</td>
              </tr>
              <tr>
                <td>不取出</td>
                <td>7.05~7.18</td>
                <td>5.688~5.754</td>
                <td>0.13</td>
              </tr>
            </tbody>
          </table>
        </table-wrap>
      </sec>
    </sec>
    <sec id="sec5">
      <title>5. 讨论与优化建议</title>
      <p>核心影响因素方面，测厚系统优化后精度已满足低导热材料检测需求，但软质样品在测试压力下仍存在压缩变形，通过进一步调整压力(降至0.05 MPa)控制误差；材料特性对检测结果的干扰显著，软质VIP因弹性结构易受连续压力影响，“不取出”装载时厚度衰减幅度远大于硬质板，根据样品硬度针对性选择装载方式。</p>
      <p>建议可从设备、样品、维护三个层面进行优化：设备层面可新增“压力自适应模块”，根据样品硬度自动调整测试压力，例如对硬质样品保持0.1 MPa压力，对软质样品降至0.05 MPa，减少压缩变形；样品层面，软质VIP测试前需经80℃真空干燥24 h，消除水分对硬度的影响，同时测试时固定装载方向，避免因位置偏差导致的测厚误差；维护层面，每月需用15.000 mm标准校准片验证测厚精度，每季度核验热流传感器与温度传感器的准确性，确保装备长期稳定运行。</p>
      <p>后续可通过两项升级进一步提升装备性能：一是新增“压力自适应模块”，通过厚度变化速率自动判断样品硬度，动态调整测试压力，减少软质样品的压缩变形；二是将现有拉绳编码器升级为激光位移传感器(精度0.001 mm)，进一步缩小与进口设备的测厚绝对值偏差，同时开发“分层测厚”功能，区分软质样品的表面压缩与内部变形，为低导热材料检测提供更精准的技术支撑。</p>
    </sec>
    <sec id="sec6">
      <title>6. 结论</title>
      <p>ST-500低导热材料检测装备通过测厚系统优化，成功解决上下板水平偏差、升降机冲击、零点校准缺失及连续测试厚度继承误差4项关键问题，测厚标准差从优化前的0.3~1.39 mm降至≤0.017 mm，结合高灵敏度EKOHF-30S热流计与Pt100热电阻，进一步实现控温精度±0.05℃、检测准确度±2%的核心性能指标，完全满足低导热材料(1~50 mW/(m∙K))的检测需求。</p>
      <p>实验验证结果表明，装备对不同硬度VIP板的适配性存在显著差异：硬质VIP板(349 × 504 × 13.80 mm)在“取出”与“不取出”两种装载方式下，厚度误差均 ≤ 0.02 mm，导热系数误差 ≤ 0.1 mW/(m∙K)，可根据测试效率需求选取装载方式；中软质与软质VIP板受材料弹性与结构影响，“不取出”装载时会出现不同程度的厚度衰减，其中软质板衰减幅度最大(0.13 mm)，导热系数波动也更为明显，因此需优先选择“取出”装载方式，避免变形对检测结果的干扰。</p>
      <p>与同类检测装备对比，ST-500低导热材料检测装备展现出显著的性能与成本优势：测厚重复性优于进口耐驰HFM446 (标准差0.01 mm vs 0.013 mm)，导热系数检测偏差仅0.84%，且成本仅为进口设备的1/2，同时满足GB/T 10295-2008标准要求，能够有效替代进口设备，推动建筑节能、家电制造及冷链物流等领域低导热材料检测的国产化进程。</p>
    </sec>
    <sec id="sec7">
      <title>NOTES</title>
      <p><sup>*</sup>通讯作者。</p>
    </sec>
  </body>
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