选型必备!摄像机视野范围估算方法
<section data-role="outer" label="Powered by 135editor.com" style="font-size:16px;"><section data-role="outer" label="Powered by 135editor.com"><section class="_135editor" data-tools="135编辑器" data-id="95429"><section><section style="background-image: url("https://neice.26x.net/UploadFile/common/wechat//2023/02-19/5c336cbc-4739-4265-8a03-8c97bd93206c.png");background-repeat: no-repeat;background-attachment: initial;background-origin: initial;background-clip: initial;background-position: center bottom;background-size: 100%;"></section><section data-autoskip="1" class="135brush" style="border-right: 2px solid rgb(149, 226, 255);border-bottom: 2px solid rgb(149, 226, 255);border-left: 2px solid rgb(149, 226, 255);border-top: none;padding: 1em;font-size: 14px;letter-spacing: 1.5px;line-height: 1.75em;color: rgb(63, 62, 63);box-sizing: border-box;"><p><span style="caret-color: red;color: rgb(61, 61, 61);letter-spacing: 1.2px;text-indent: 0em;font-family: 微软雅黑;">康康,摄像机的视野范围怎么计算?不同的焦距如何计算照射距离?</span><span style="caret-color: red;color: rgb(61, 61, 61);letter-spacing: 1.2px;text-indent: 0em;font-family: 微软雅黑;">不要着急,往下看,康康为你揭晓答案~</span></p></section></section></section><section data-role="paragraph" class="_135editor"><p><br></p></section><section class="_135editor" data-tools="135编辑器" data-id="95211"><section style="text-align: center;"><section style="display: inline-block;width:7em;"></section></section></section><p style="-webkit-max-logical-width: 100%;padding-top: 5px;padding-bottom: 5px;text-indent: 0em;caret-color: rgb(255, 0, 0);line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);font-family: 微软雅黑;box-sizing: border-box !important;outline: none 0px !important;"><br></p><section class="_135editor" data-tools="135编辑器" data-id="95326"><section style="text-align: center;"><section style="display: inline-block;"><section style="width:2em;margin-left: -15px;margin-bottom: -15px;"></section><section class="135brush" data-brushtype="text" style="background: rgb(28, 37, 77);padding: 6px 1em;color: rgb(255, 255, 255);border-width: 3px;border-style: solid;border-color: rgb(254, 254, 254);transform: rotate(0deg);">影响视野的参数</section></section></section></section><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><br></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><strong style="letter-spacing: 1.2px;text-indent: 0em;caret-color: red;"><span style="color: #D2000F;">影响摄像机视野范围的相关参数有哪些?</span></strong><br></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><span style="color: #717071;">在选择监控设备的时候,除了常见的像素、防护等级、传感器类似尺寸等参数外,镜头焦距(也就是常说的多少毫米的镜头)也是一个重要的参数,看焦距的意义,是为了预估一下摄像头的视角范围,以便初步判断监控和场景是否匹配。</span></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><br></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><span style="color: #717071;letter-spacing: 1.2px;text-indent: 0em;caret-color: red;">选择不同焦距的镜头,看相同的场景,视野范围会有差异。</span><br></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><strong><span style="color: #717071;">焦距越小,可视距离越近,视场角越大(视野范围越大)。</span></strong></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><strong><span style="color: #717071;">焦距越大,可视距离越远,视场角越小(视野范围越小)。</span></strong><span style="color: #717071;"> </span><span style="color: #717071;">(事例中设备的监控距离和视场角度不是统一值,不同设备的参数不同)</span></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><br></p><section class="_135editor" data-tools="135编辑器" data-id="95326"><section style="text-align: center;"><section style="display: inline-block;"><section style="width:2em;margin-left: -15px;margin-bottom: -15px;"></section><section class="135brush" data-brushtype="text" style="background: rgb(28, 37, 77);padding: 6px 1em;color: rgb(255, 255, 255);border-width: 3px;border-style: solid;border-color: rgb(254, 254, 254);transform: rotate(0deg);">焦距与距离</section></section></section></section><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><br></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><strong style="letter-spacing: 1.2px;text-indent: 0em;caret-color: red;"><span style="color: #D2000F;">不同焦距,监控距离的参考值是多少?</span></strong><br></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><span style="color: #717071;">4mm(含)以上的镜头,监测距离大致可以按照下面表格进行估算</span></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><span style="color: #717071;">(监控使用的环境、光线、安装角度等众多因素,会对监控视野产生影响,表格内容只能作为参考,实际监测距离以实测为准。)</span></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><br></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><span style="color: #717071;">(表格上2MP/3Mp等是像素200万/300万)</span></p></section><p><span style="color: rgb(113, 112, 113);font-size: 14px;">备注:</span><span style="color: rgb(113, 112, 113);font-size: 14px;">看清人脸和人体的判断依据为:</span><span style="color: rgb(113, 112, 113);font-size: 14px;">人脸瞳间距40个像素,人体横向30个像素</span></p><section data-role="outer" label="Powered by 135editor.com"><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><span style="color: #717071;"></span><br></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><br></p><section class="_135editor" data-tools="135编辑器" data-id="95326"><section style="text-align: center;"><section style="display: inline-block;"><section style="width:2em;margin-left: -15px;margin-bottom: -15px;"></section><section class="135brush" data-brushtype="text" style="background: rgb(28, 37, 77);padding: 6px 1em;color: rgb(255, 255, 255);border-width: 3px;border-style: solid;border-color: rgb(254, 254, 254);transform: rotate(0deg);">计算视野宽度</section></section></section></section><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><br></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><strong><span style="color: #D2000F;">③摄像机能够监控多大范围(视野有多宽),应该如何计算?</span></strong></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><span style="color: #717071;">摄像机能够照射多宽的场景,利用三角函数公式,结合视场角,大致就可以估算出来。</span></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><br></p><br><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><span style="color: #717071;">摄像机的视野剖面为一个等腰三角形,三角形顶角为摄像头视场角,三角形高为监控距离,底边为视野宽度。</span></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><span style="color: #717071;">以DS-2CD3T26(D)WD-I3/I5/I8这款设备为例,视场角官网上有介绍,4mm镜头,其水平视场角为81°。</span></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"></p><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;"><span style="color: #717071;">按照三角函数公式计算,顶角一半为40.5°,<strong>tan40.5°=底边一半/监控距离</strong>,结合前面监控距离的估算,如果以看清人体活动距离来算,监控距离16米,算下来整个底边的值就等于(2Xtan40.5°X16)≈27米。</span></p><section class="_135editor" data-tools="135编辑器" data-id="95284"><section style="width: 25px;margin-right: auto;margin-left: auto;"></section></section><p style="line-height: 1.9em;font-size: 14px;letter-spacing: 1.2px;color: rgb(61, 61, 61);text-indent: 0em;padding-top: 5px;padding-bottom: 5px;font-family: 微软雅黑;text-align: center;"><span style="background-color: rgb(255, 104, 39);color: rgb(255, 255, 255);"><strong>注意:</strong><strong>以上为摄像机监控距离的估算方式,仅供参考,实际监测距离以实测为准。</strong></span><strong><span style="color: #717071;"></span></strong></p><section style="box-sizing: border-box;font-size: 16px;"><section style="text-align: center;margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;" powered-by="xiumi.us"><section style="max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;"></section></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="margin-top: 0.5em;margin-bottom: 0.5em;box-sizing: border-box;" powered-by="xiumi.us"><section style="margin-bottom: -10px;padding-right: 5px;padding-left: 5px;font-size: 18px;text-align: right;color: rgb(249, 110, 87);box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="width: 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