PS-GS植物茎流/树干液流测量�?参数-价格-中国粉体罐�/title>

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$(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <p><span>PS-GS</span><span>植物茎流<span>/</span>树干液流测量仪是由法国农科院<span>(INRA) </span>皃�span> Granier</span>教授发明皃�span>Granier</span>热消散探针法＇�span>Thermal Dissipation Probe� TDP</span>）树干液流测定系绞�span>� </span>现在被广泛地应用于生态水文学和植物生理生态学的研究。应�?span>Granier</span>热消散探针测定木本植物树干液流的方法，可以定量地测量整树的蒸腾用水量、�/span></p><p><span>上图显示该系统在树上的安装及全套系统组成和配置。一套完整的<span>Granier</span>系统包括探针、热均铜管、金属屏蔽专用信号电缆、探头恒流电源系绞�span>(PS-PS12)</span>、数采仪及蓄电池或太阳能板、�/span></p><p><span>每付<span>Granier</span>探头包括<span>2</span>个物理性能和结构完全一致的感应探针，每个探针包含一个超细铜<span>?</span>康铜热电偶及由泰弗龙绝缘的加热丝线圈。两个探针在<span>130</span>厘米高处插入树干，上下间跜�span>10-15cm</span>，上部的探针用一恒定电流加热，而下部探针不加热，两针之间的温差由一数采仪测定。树干内树液流的运动带走热针的热量，使得两针之间的温度差变小、�span>Granier (1985� 1987)</span>发现两针之间的温差参数与树干液流密度具有极高的相关性，而且该相关关系与树种及木材解剖结构无关、�/span></p><p><span>技术参�?/span></p><table cellspacing="0" cellpadding="2" border="1" bordercolor="#f2f2f2" width="100%"><tbody><tr><td><p><span>传感�?/span></p></td><td><p><span>传感器型叶�/span></p></td><td><p><span>PS-GS33x10</span></p></td><td><p><span>PS-GS33x20</span></p></td><td><p><span>PS-GS50x20</span></p></td><td><p><span>PS-GS100x20</span></p></td></tr><tr><td></td><td><p><span>探针镾�span>/</span>有效感应头长</span></p></td><td colspan="4"><p><span>33/10mm</span></p></td></tr><tr><td></td><td><p><span>电源输入<span>/</span>功耖�/span></p></td><td colspan="4"><p><span>恒流<span>130 </span>毫安<span>/ 0.2</span>�?/span></p></td></tr><tr><td></td><td><p><span>信号输出</span></p></td><td colspan="4"><p><span>0 ~ 600 </span><span>微伏，直�?/span></p></td></tr><tr><td></td><td><p><span>适于树径<span>(</span>皮下<span>)</span></p></td><td colspan="4"><p><span>直径<span>>20 mm</span></p></td></tr><tr><td></td><td><p><span>电缆</span></p></td><td colspan="4"><p><span>四芯金属屏蔽信号电缆，可延长�?span>50m</span></p></td></tr><tr><td></td><td><p><span>发热件类垊�/span></p></td><td colspan="4"><p><span>缠绕式康铜电热丝</span></p></td></tr><tr><td></td><td><p><span>均热套管</span></p></td><td colspan="4"><p><span>黄铜套管</span></p></td></tr><tr><td><p><span>传感器恒流电源盒<span>(PS-PS12)</span></p></td><td colspan="5"><p><span>可供电传感器数量：通常<span>12</span>个，但电缆总长度过长或长探针数量较高可能减少传感器个数、�/span></p></td></tr><tr><td></td><td colspan="5"><p><span>电源输入９�span>11 ~ 15</span>伏直流输入，</span></p></td></tr><tr><td></td><td colspan="5"><p><span>功耗：<span>390mA (</span>若测<span> 7 ~ 9</span>� 探头<span>)</span>＋�span>260mA (</span>若测<span> 4 ~ 6</span>� 探头<span>)</span>，或<span>130mA (</span>若测<span> 1 ~ 3</span>� 探头<span>).</span></p></td></tr><tr><td></td><td colspan="5"><p><span>电源输出：恒�?span>130 mA</span>，直�?/span></p></td></tr><tr><td></td><td colspan="5"><p><span>每个<span>PS-PS12</span>传感器恒流电源盒内含<span>4</span>个恒流电源模块，每个模块可为<span>3</span>个传感器供电、�/span></p></td></tr><tr><td></td><td colspan="5"><p><span>即使因传感器<span>+</span>电缆电阻在一定范围内变化，通过传感器的电流仍保持恒定，**程度保证传感器测量质量、�/span></p></td></tr><tr><td><p><span>数采�?/span></p></td><td colspan="5"><p><span>可连用所有高性能通用数采仪。推荐使�?span>Campbell Scientific</span>公司皃�span>CR1000</span>数采（下详）：数据采集器９�span>CR1000</span>扫描频率９�span>100Hz</span>模拟信号输入９�span>16</span>个单端通道＇�span>8</span>个差分通道），主机可直接连�?span>8 </span>�?span>PS-GS</span>传感器。脉冲通道９�span>2</span>个工作温度：<span> -25 ~ 50</span>℃（标准）内存：标准丹�span>4M</span>内存，可扩展臲�span>2G</span>供电电压９�span>9 ~ 16Vdc</p><p> A/D</span>转换９�span>13bit</span>若加�?span>AM16/32</span>模拟输入通道扩展板，则可增加数据采集器可以测量的传感器的数量、�span> AM16/32B</span>可以顺序测量<span>32</span>组传感器。数据和程序自动断电保护、�/span></p></td></tr><tr><td><p><span>其他配件</span></p></td><td colspan="5"><p><span>传感器恒流电源盒<span>(PS-PS12)</span>所需<span>12</span>伏大容量蓄电池或太阳能电溏�span>(</span>建议用户在当地采�?span>＋�/span>因其过于笨重<span>)</span>、�/span></p></td></tr></tbody></table> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; 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