相位式激光测距仪的原理剖析

hongcheng1718

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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:left;text-indent:21.0pt;mso-pagination:widow-orphan" align="left"><span style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt" lang="EN-US"><a href="http://www.hcjyet.com"><span lang="EN-US"><span lang="EN-US">广州市宏诚集业电子科技有限公司</span></span><span lang="EN-US"><span lang="EN-US"> </span></span><span lang="EN-US"><span lang="EN-US">激光测距仪</span></span></a></span><span style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:
0pt">是光波测距中的一种测距方式，如果光以速度<span lang="EN-US">c</span>在空气中传播在<span lang="EN-US">A</span>、<span lang="EN-US">B</span>两点间往返一次所需时间为<span lang="EN-US">t</span>，则<span lang="EN-US">A</span>、<span lang="EN-US">B</span>两点间距离<span lang="EN-US">D</span>可用下列表示。<span lang="EN-US"></span></span></p><span style="font-size:12.0pt;font-family:宋体;
mso-bidi-font-family:宋体;mso-font-kerning:0pt"><span lang="EN-US"></span></span>

<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:left;text-indent:21.0pt;mso-pagination:widow-orphan" align="left"><span style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt" lang="EN-US">&nbsp;</span></p>

<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:left;text-indent:21.0pt;mso-pagination:widow-orphan" align="left"><span style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:
0pt">由上式可知，要测量<span lang="EN-US">A</span>、<span lang="EN-US">B</span>距离实际上是要测量光传播的时间<span lang="EN-US">t</span>，依据测量时间方法的不同，激光测距仪通常可分为脉冲式和相位式两种测量形式。以下着重介绍：相位式激光测距仪。<span lang="EN-US"></span></span></p>

<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:left;text-indent:21.0pt;mso-pagination:widow-orphan" align="left"><span style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt" lang="EN-US">&nbsp;</span></p>

<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:left;text-indent:21.0pt;mso-pagination:widow-orphan" align="left"><span style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:
0pt">相位式<span lang="EN-US"><a href="http://www.hcjyet.com"><span lang="EN-US"><span lang="EN-US">激光测距仪</span></span></a></span>是用无线电波段的频率，对激光束进行幅度调制并测定调制光往返测线一次所产生的相位延迟，再依据调制光的波长，换算此相位延迟所代表的距离。即用间接方法测定出光经往返测线所需的时间。<span lang="EN-US"></span></span></p>

<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:left;text-indent:21.0pt;mso-pagination:widow-orphan" align="left"><span style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt" lang="EN-US">&nbsp;</span></p><span style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:left;text-indent:21.0pt;mso-pagination:widow-orphan" align="left"><span style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt" lang="EN-US">&nbsp;</span></p>

<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:left;text-indent:21.0pt;mso-pagination:widow-orphan" align="left"><span style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:
0pt">在给定调制和标准大气条件下，频率<span lang="EN-US">c/(4</span>π<span lang="EN-US">f)</span>是一个常数，此时距离的测量变成了测线所包含半波长个数的测量和不足半波长的小数部分的测量即测<span lang="EN-US">N</span>或φ，由于近代精密机械加工技术和无线电测相技术的发展，已使φ的测量达到很高的精度。<span lang="EN-US"></span></span></p>

<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:left;text-indent:21.0pt;mso-pagination:widow-orphan" align="left"><span style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt" lang="EN-US">&nbsp;</span></p>

<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:left;text-indent:21.0pt;mso-pagination:widow-orphan" align="left"><span style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:
0pt">为了测得不足π的相角φ，可以通过不同的方法来进行测量，通常运用最多的是延迟测相和数字测相，目前短程激光测距仪均采用数字测相原理来求得φ。<span lang="EN-US"></span></span></p>

<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:left;mso-pagination:widow-orphan" align="left"><span style="font-size:12.0pt;
mso-bidi-font-size:10.5pt;font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:
0pt">广州市宏诚集业电子科技有限公司 </span><span style="font-size:12.0pt;
mso-bidi-font-size:10.5pt;font-family:Verdana;mso-bidi-font-family:宋体;
mso-font-kerning:0pt" lang="EN-US"><a href="http://www.hcjyet.com/" target="_blank"><span style="mso-bidi-font-size:12.0pt">http://www.hcjyet.com</span></a> </span><span style="font-size:12.0pt;mso-bidi-font-size:10.5pt;font-family:宋体;mso-bidi-font-family:
宋体;mso-font-kerning:0pt">激光测距仪 了解详情。</span><span style="font-size:
12.0pt;font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:0pt" lang="EN-US"></span></p>

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宋体;mso-font-kerning:0pt" lang="EN-US">&nbsp;</span><span style="font-size:12.0pt;
font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:0pt" lang="EN-US"></span></p>

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mso-bidi-font-family:宋体;mso-font-kerning:0pt" lang="EN-US">&nbsp;</span></p>

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mso-pagination:widow-orphan" align="left"><span lang="EN-US">&nbsp;</span></p>

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