500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/84/3417251259819575.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">讨论一个“继电器触点粘连检测电路”
在继电器的使用过程中,万一触点发生粘连,单片机就可能不能使继电器释放,导致交流一直通着,从而引发事故,因此增加继电器的触点粘连检测电路是有必要的.这是我在一个电热地毯上看到的电路,想和大家讨论一下为什么能起到触点粘连检测作用.
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