直流双臂电桥干什么用的 QJ31携式直流双臂电桥的具体使用方法
\u76f4\u6d41\u53cc\u81c2\u7535\u6865\u600e\u4e48\u7528\u5355\u81c2\u76f4\u6d41\u7535\u6865(\u60e0\u65af\u767b\u7535\u6865)\u3001\u53cc\u81c2\u76f4\u6d41\u7535\u6865(\u5f00\u5c14\u6587\u7535\u6865)\u3002
http://www.lsrtvu.net/zsb/0409/hsdyiyy.doc
http://appleliguo.blogchina.com/1668524.html
http://wlsy.cug.edu.cn/yqjs/Print.asp?ArticleID=288
1.QJ31\u578b\u643a\u5e26\u5f0f\u76f4\u6d41\u5355\u53cc\u81c2\u7535\u6865\uff0c\u76f4\u6d41\u5355\u53cc\u81c2\u7535\u6865\u7528\u9014\u548c\u7279\u70b9
1.1 QJ31\u578b\u643a\u5e26\u5f0f\u76f4\u6d41\u5355\u53cc\u81c2\u7535\u6865\uff0c\u76f4\u6d41\u5355\u53cc\u81c2\u7535\u6865\uff0c\u91c7\u7528\u60e0\u65af\u987f\u548c\u51ef\u5c14\u6587\u7535\u6865\u7ec4\u5408\u7ebf\u8def\uff0c\u5185\u9644\u6307\u96f6\u4eea\u5e76\u80fd\u5185\u88c5\u5de5\u4f5c\u7535\u6c60\uff0c\u9664\u6d4b\u91cf\u5bfc\u7ebf\u5916\uff0c\u4e0d\u9700\u8981\u5176\u5b83\u9644\u4ef6\u5373\u53ef\u5bf9\u76f4\u6d41\u7535\u963b\u8fdb\u884c\u6d4b\u91cf\u5de5\u4f5c\u3002
1.2 \u91c7\u7528JZ2\u578b\u6307\u96f6\u4eea\uff0c\u7075\u654f\u5ea6\u9ad8\uff0c\u5728\u5404\u91cf\u7a0b\u7684\u7535\u6e90\u56de\u8def\u4e2d\u4e32\u5165\u5408\u9002\u7684\u9650\u6d41\u7535\u963b\uff0c\u4f7f\u7535\u6865\u5728\u5404\u91cf\u7a0b\u7684\u7075\u654f\u5ea6\u6bd4\u8f83\u5747\u5300\uff0c\u786e\u4fdd\u5404\u91cf\u7a0b\u51c6\u786e\u5ea6\u5e76\u6709\u8db3\u591f\u5206\u8fa8\u529b\u3002
1.3 \u7535\u6865\u5907\u6709\u5916\u63a5\u6307\u96f6\u4eea\u63d2\u5ea7\u548c\u53cc\u6865\u5916\u63a5\u7535\u6e90\u63a5\u7ebf\u67f1\uff0c\u4ee5\u6ee1\u8db3\u5404\u79cd\u7528\u9014\u7684\u9700\u8981\u3002
1.4 \u7528\u9014\uff1a\u9002\u5408\u5728\u5de5\u77ff\u4f01\u4e1a\u3001\u5b9e\u9a8c\u5ba4\u3001\u8f66\u95f4\u73b0\u573a\u6216\u91ce\u5916\u5de5\u5730\uff0c\u5bf9100µ\u03a9~1.111M\u03a9\u8303\u56f4\u5185\u76f4\u6d41\u7535\u963b\u4f5c\u7cbe\u5bc6\u6d4b\u91cf\u3002\u5982\u91d1\u5c5e\u5bfc\u4f53\u7684\u7535\u963b\u7387\u3001\u7ebf\u7f06\u7535\u963b\u3001\u5206\u6d41\u5668\u7535\u963b\u3001\u5f00\u5173/ \u7535\u5668\u7684\u63a5\u89e6\u7535\u963b\u53ca\u7535\u673a\u3001\u53d8\u538b\u5668\u7684\u7ed5\u7ec4\u76f4\u6d41\u7535\u963b\u7b49\u7b49\u3002
2.\u4e3b\u8981\u6280\u672f\u6307\u6807
2.1 QJ31\u578b\u643a\u5e26\u5f0f\u76f4\u6d41\u5355\u53cc\u81c2\u7535\u6865\u4e3b\u8981\u6280\u672f\u6307\u6807\u7b26\u5408\u300aGB3930-83\u6d4b\u91cf\u7535\u963b\u7528\u76f4\u6d41\u7535\u6865\u300b\u56fd\u5bb6\u6807\u51c6\u3002
2.2\u7535\u6865\u7684\u603b\u6709\u6548\u91cf\u7a0b\uff1a
\u5355\u81c2\u7535\u6865\uff1a0~1.111000M\u03a9
\u53cc\u81c2\u7535\u6865\uff1a0~111.10\u03a9
2.3\u4f7f\u7528\u73af\u5883\u6761\u4ef6\uff1a
\u53c2\u8003\u6761\u4ef6\uff1a\u6e29\u5ea6\u4e3a20\u00b11\u00b0C\uff0c \u76f8\u5bf9\u6e7f\u5ea6\u4e3a40\uff05~60\uff05\u3002
\u6807\u51c6\u6761\u4ef6\uff1a\u6e29\u5ea6\u4e3a20\u00b110\u00b0C\uff0c \u76f8\u5bf9\u6e7f\u5ea6\u4e3a25\uff05~80\uff05\u3002
2.4\u7535\u6865\u5404\u91cf\u7a0b\u3001\u6d4b\u91cf\u8303\u56f4\u3001\u7b49\u7ea7\u6307\u6570\u4e8e\u88681\u3001\u88682\u6240\u793a\u3002
2.5\u57fa\u672c\u8bef\u5dee\u5141\u8bb8\u6781\u9650
\u5728\u53c2\u8003\u6e29\u5ea6\u548c\u76f8\u5bf9\u6e7f\u5ea6\u6761\u4ef6\u4e0b\uff0c\u7535\u6865\u5404\u91cf\u7a0b\u7684\u5141\u8bb8\u8bef\u5dee\u6781\u9650\u4e3a\uff1a
Elim=\u00b1C%(RN/10+X)
\u5f0f\u4e2d\uff1aElim \uff0d\u5141\u8bb8\u8bef\u5dee\u6781\u9650\uff0c\u03a9\uff1b C \uff0d\u51c6\u786e\u5ea6\u7b49\u7ea7\u6307\u6570\uff1b RN \uff0d\u57fa\u51c6\u503c\uff0c\u03a9\uff08\u53d6\u8be5\u91cf\u7a0b\u5185\u6700\u5927\u768410\u7684\u6574\u6570\u5e42\uff09\uff1b X \uff0d\u6807\u5ea6\u76d8\u793a\u503c\uff0c\u03a9\uff1b
2.6\u5141\u8bb8\u7684\u53d8\u5dee
2.6.1\u6e29\u5ea6\u5f15\u8d77\u7684\u53d8\u5dee\uff1a\u76f8\u5bf9\u6e7f\u5ea6\u5728\u53c2\u8003\u6761\u4ef6\u4e0b\uff0c\u6e29\u5ea6\u8d85\u8fc7\u53c2\u8003\u6e29\u5ea6\u8303\u56f4\uff0c\u4f46\u5728\u6807\u79f0\u8303\u56f4\u5185\uff0c\u7531\u4e8e\u6e29\u5ea6\u53d8\u5316\u5f15\u8d77\u7684\u9644\u52a0\u8bef\u5dee\u4e0d\u5e94\u8d85\u8fc7\u76f8\u5e94\u4e00\u4e2a\u7b49\u7ea7\u6307\u6570\u503c\u3002
2.6.2\u6e7f\u5ea6\u5f15\u8d77\u7684\u53d8\u5dee\uff1a\u6e29\u5ea6\u5728\u53c2\u8003\u6761\u4ef6\u4e0b\uff0c\u76f8\u5bf9\u6e7f\u5ea6\u8d85\u8fc7\u53c2\u8003\u503c\u8303\u56f4\uff0c\u4f46\u5728\u6807\u79f0\u503c\u8303\u56f4\u5185\uff0c\u7531\u4e8e\u6e7f\u5ea6\u53d8\u5316\u5f15\u8d77\u7684\u9644\u52a0\u8bef\u5dee\u4e0d\u5e94\u8d85\u8fc7\u76f8\u5e94\u4e00\u4e2a\u7b49\u7ea7\u6307\u6570\u503c\u768420\uff05\u3002
2.7\u7edd\u7f18\u7535\u963b\u548c\u7535\u538b\u8bd5\u9a8c
2.7.1\u7edd\u7f18\u7535\u963b\uff1a\u7ebf\u8def\u5bf9\u5916\u58f3\u4e4b\u95f4\u7edd\u7f18\u7535\u963b\u5e94\u5927\u4e8e5 M\u03a9\uff0c\u8bd5\u9a8c\u7535\u538b500V\uff1b
2.7.2\u7535\u538b\u8bd5\u9a8c\uff1a\u7ebf\u8def\u5bf9\u5916\u58f3\u4e4b\u95f4\u80fd\u7ecf\u53d7\u9891\u7387\u4e3a50HZ\u5b9e\u9645\u5f26\u6ce2500V1\u5206\u949f\u8bd5\u9a8c\uff0c\u4e0d\u51fb\u7a7f\u3001\u65e0\u98de\u5f27\u73b0\u8c61\u3002
2.8\u7535\u6865\u5de5\u4f5c\u7535\u6e90\uff1a
2.8.1\u5355\u6865\u7535\u6e90\uff1a\u5185\u88c51.5V1\u53f7\u5e72\u7535\u6c601\u8282\u548c6F22\u578b9V\u53e0\u5c42\u7535\u6c602\u8282\uff08\u5e76\u8054\u4f7f\u7528\uff09\uff1b
2.8.2\u53cc\u6865\u7535\u6e90\uff1a\u5185\u88c51.5V1\u53f7\u5e72\u7535\u6c603\u8282\uff08\u5e76\u8054\u4f7f\u7528\uff09\uff0c\u5916\u63a5\u4e3a1.5V~2V\uff1b
2.8.3\u6307\u96f6\u4eea\u7535\u6e90\uff1a\u5185\u88c56F22\u578b9V\u53e0\u5c42\u7535\u6c602\u8282\uff08\u5e76\u8054\u4f7f\u7528\uff09\u3002
2.9\u5916\u5f62\u5c3a\u5bf8\uff1a300mm\u00d7255 mm\u00d7150 mm\u3002
2.10\u8d28\u91cf\uff08\u91cd\u91cf\uff09\uff1a\u7ea64.5Kg\u3002
3.\u57fa\u672c\u5de5\u4f5c\u539f\u7406
3.1 QJ31\u578b\u539f\u7406\u7ebf\u8def\uff1a
3.2\u7535\u6865\u7ec4\u6210
3.2.1\u5355\u7535\u6865\uff1a\u5c5e\u5178\u578b\u7684\u60e0\u65af\u987f\u7535\u6865\u7ebf\u8def\uff0c\u516d\u53ea\u7535\u963b\u5143\u4ef6\u4e2d\u95f4\u62bd\u5934\u7ec4\u6210\u6bd4\u4f8b\u81c2\uff0c\u6784\u62105\u4e2a\u500d\u7387\uff0c\u753110\u00d71000\u03a9\u300110\u00d7100\u03a9\u300110\u00d710\u03a9\u300110\u00d71\u03a9\u56db\u4e2a\u5341\u8fdb\u76d8\u7ec4\u6210\u6bd4\u8f83\u81c2\uff0c\u5373\u8bfb\u6570\u76d8\u3002\u7535\u6e90\u56de\u8def\u4e2d\u5206\u522b\u4e32\u6709r3\u3001r4\u3001r5\u548cr6 \u56db\u4e2a\u9650\u6d41\u7535\u963b\uff0c\u4f7f\u5404\u91cf\u7a0b\u7075\u654f\u5ea6\u6bd4\u8f83\u5747\u5300\u3002\u88ab\u6d4b\u7535\u963b\u4ece\u201c\u201cRXW\u201d\u201d\u4e8c\u63a5\u7ebf\u67f1\u4ee5\u4e8c\u7ebf\u5236\u65b9\u5f0f\u63a5\u5165\u3002
3.2.2\u53cc\u7535\u6865\uff1a\u5c5e\u5178\u578b\u7684\u51ef\u5c14\u6587\u7535\u6865\u7ebf\u8def\uff0c\u7531\u56db\u53ea\u7535\u963b\u5143\u4ef6\u7ec4\u6210\u56db\u4e2a\u500d\u7387\uff1b\u6bd4\u8f83\u81c2\u5373\u8bfb\u6570\u76d8\u6709\u5b8c\u5168\u5bf9\u79f0\u7684\u4e8c\u7ec4\u7ec4\u6210\uff0c\u6bcf\u7ec4\u7531\u56db\u4e2a\u5341\u8fdb\u76d8\u7ec4\u6210\uff0c\u5176\u4e2d\u4e00\u7ec4\u4e0e\u5355\u7535\u6865\u6bd4\u8f83\u81c2\u5408\u7528\u3002\u7535\u6e90\u56de\u8def\u4e2d\u5206\u522b\u4e32\u6709r7\u3001r8\u3001\u548cr9 \u4e09\u4e2a\u9650\u6d41\u7535\u963b\uff0c\u4f7f\u5404\u91cf\u7a0b\u7075\u654f\u5ea6\u6bd4\u8f83\u5747\u5300\u3002\u88ab\u6d4b\u7535\u963b\u4ece\u201cRXK\u201d\u56db\u63a5\u7ebf\u67f1C1\u3001P1\u3001P2\u3001C2\u4ee5\u56db\u7ebf\u5236\u65b9\u5f0f\u63a5\u5165\uff0c\u5176\u4e2dC1\u3001C2 \u4e3a\u7535\u6d41\u7aef\uff0cP1\u3001P2\u4e3a\u7535\u4f4d\u7aef\u3002
3.2.3\u5185\u9644\u6307\u96f6\u4eea\uff1a\u91c7\u7528JZ2\u578b\u8c03\u5236\u5f0f\u653e\u5927\u5668\uff0c\u5177\u6709\u7075\u654f\u5ea6\u9ad8\u3001\u96f6\u6f02\u5c0f\u3001\u8017\u7535\u7701\u7b49\u7279\u70b9\u3002
4\u7535\u6865\u7ed3\u6784\u3002
5.\u4f7f\u7528\u65b9\u6cd5
5.1\u51c6\u5907
5.1.1\u5728\u7535\u6865\u80cc\u9762\u7535\u6c60\u76d2\u5185\u5206\u522b\u88c5\u5165\u5355\u6865\u7535\u6e90\u3001\u53cc\u6865\u7535\u6e90\u548c\u6307\u96f6\u4eea\u7535\u6e90\u3002\u53cc\u81c2\u7535\u6865\u53ef\u91c7\u7528\u5916\u63a5\u7535\u6e90\u3002
5.1.2\u6307\u96f6\u4eea\u8c03\u96f6\uff1a\u5c06\u201c\u7535\u6e90\u9009\u62e9\u201d\u5f00\u5173\u7531\u201c\u65ad\u201d\u65cb\u5230\u9700\u8981\u4f4d\u7f6e\u4e0a\uff0c\u6307\u96f6\u4eea\u7535\u6e90\u63a5\u901a\uff0c5\u5206\u949f\u540e\u5bf9\u6307\u96f6\u4eea\u8c03\u96f6\u3002
5.2\u6d4b\u91cf
5.2.1\u5355\u6865\u6d4b\u91cf
\u88ab\u6d4b\u7535\u963b\u4e0e\u201cRXW\u201d\u4e8c\u63a5\u7ebf\u67f1\u76f8\u8fde\uff0c\u5982\u56fe3a\u6240\u793a\uff0c\u5c06\u201c\u201d\u53cc\u6865\u500d\u7387\u7f6e\u4e8e\u201c\u5355\u201d\uff0c\u9002\u5f53\u9009\u62e9\u201c\u5355\u6865\u500d\u7387\u201d\uff0c\u201c\u7535\u6e90\u9009\u62e9\u201d\u5728W1~W4\u4e2d\u9009\u62e9\u5176\u4e00\uff0c\u6309\u4e0b\u201cB\u201d\u3001\u201cG\u201d\u6309\u94ae\uff0c\u8c03\u8282\u6d4b\u91cf\u76d8\uff0c\u4f7f\u6307\u96f6\u4eea\u91cd\u65b0\u56de\u96f6\uff0c\u7535\u6865\u5e73\u8861\uff0c\u5219\u88ab\u6d4b\u7535\u963b\u4e3a\uff1a
RX\uff1d\u5355\u6865\u500d\u7387\u00d7\u6d4b\u91cf\u76d8\u793a\u503c\u3002
5.2.2\u53cc\u6865\u6d4b\u91cf
\u88ab\u6d4b\u7535\u963b\u4e0e\u201cRXK\u201d\u56db\u63a5\u7ebf\u67f1C1\u3001P1\u3001P2\u3001C2 \u6b63\u786e\u76f8\u8fde\uff0c\u5982\u56fe3b\u6240\u793a\uff0cAB\u4e8c\u70b9\u4e3a\u6709\u6548\u6d4b\u91cf\u70b9\uff1b\u5c06\u201c\u5355\u6865\u500d\u7387\u201d\u7f6e\u4e8e\u201c\u53cc\u201d\uff0c\u9002\u5f53\u9009\u62e9\u201c\u53cc\u6865\u500d\u7387\u201d\uff0c\u201c\u7535\u6e90\u9009\u62e9\u201d\u5728K1~K3\u4e2d\u9009\u62e9\u5176\u4e00\uff0c\u6309\u4e0b\u201cB\u201d\u3001\u201cG\u201d\u6309\u94ae\uff0c\u8c03\u8282\u6d4b\u91cf\u76d8\uff0c\u4f7f\u6307\u96f6\u4eea\u91cd\u65b0\u56de\u96f6\uff0c\u7535\u6865\u5e73\u8861\uff0c\u5219\u88ab\u6d4b\u7535\u963b\u4e3a\uff1a
RX=\u53cc\u6865\u500d\u7387\u00d7\u6d4b\u91cf\u76d8\u793a\u503c\u3002
5.2.3\u5916\u63a5\u6307\u96f6\u4eea\uff1a\u4e3a\u4e86\u63d0\u9ad8\u7535\u6865\u6d4b\u91cf\u5206\u8fa8\u529b\u548c\u51c6\u786e\u5ea6\uff0c\u53ef\u4ee5\u5916\u63a5\u6307\u96f6\u4eea\u3002\u7528\u5bfc\u7ebf\u5c06\u4e13\u7528\u63d2\u5934\u548c\u5916\u63a5\u6307\u96f6\u4eea\u8fde\u63a5\u597d\uff0c\u63d2\u5165\u5916\u63a5\u6307\u96f6\u4eea\u63d2\u5ea7\uff08G\u5916\uff09\u5c31\u53ef\u63a5\u901a\u5916\u63a5\u6307\u96f6\u4eea\uff0c\u5185\u9644\u6307\u96f6\u4eea\u540c\u65f6\u65ad\u5f00\u3002
5.2.4\u53cc\u6865\u5916\u63a5\u7535\u6e90\uff1a\u4e3a\u4e86\u5ef6\u957f\u53cc\u6865\u6d4b\u91cf\u65f6\u95f4\uff0c\u53ef\u4ee5\u201c\u53cc\u6865\u5916\u63a5\u7535\u6e90\u201d\u63a5\u7ebf\u67f1\u63a5\u51651.5V~2V\u5404\u7c7b\u76f4\u6d41\u7535\u6e90\u3002
6.\u6ce8\u610f\u4e8b\u9879
6.1\u5728\u4f7f\u7528\u53cc\u81c2\u7535\u6865\u65f6\uff0c\u201cB\u201d\u6309\u94ae\u5e94\u95f4\u6b47\u4f7f\u7528\uff0c\u907f\u514d\u6d6a\u8d39\u7535\u6e90\u3002\u63a5\u7ebf\u67f1\u5230\u88ab\u6d4b\u7535\u963b\u4e4b\u95f4\u7684\u8fde\u63a5\u5bfc\u7ebf\u7535\u963b\u4e0d\u5927\u4e8e0.05\u03a9\u3002
6.2\u5728\u6d4b\u91cf\u5e26\u7535\u611f\u5206\u91cf\u7684\u76f4\u6d41\u7535\u963b\u65f6\uff0c\u4e3a\u9632\u6b62\u53cd\u7535\u52bf\u635f\u574f\u7535\u6865\uff0c\u6d4b\u91cf\u65f6\u5e94\u5148\u6309\u201cB\u201d\u3001\u540e\u6309\u201cG\u201d\u6309\u94ae\uff1b\u6d4b\u91cf\u5b8c\u6bd5\uff0c\u5e94\u5148\u653e\u201cG\u201d,\u540e\u653e\u201cB\u201d\u6309\u94ae\u3002
6.3\u7535\u6865\u5e94\u8d2e\u5b58\u5728\u73af\u5883\u6e29\u5ea610~30\u00b0C,\u76f8\u5bf9\u6e7f\u5ea625\uff05~80\uff05\u7684\u6761\u4ef6\u4e0b\uff0c\u5ba4\u5185\u7a7a\u6c14\u4e0d\u5e94\u6709\u8150\u8680\u4eea\u5668\u7684\u6c14\u4f53\u548c\u6709\u5bb3\u6742\u8d28\uff0c\u800c\u4eea\u5668\u4e0d\u5e94\u53d7\u65e5\u5149\u7684\u76f4\u63a5\u7167\u5c04\u3002
6.4\u4f7f\u7528\u4e2d\uff0c\u5982\u53d1\u73b0\u6307\u96f6\u4eea\u7075\u654f\u5ea6\u663e\u8457\u4e0b\u964d\uff0c\u53ef\u80fd\u56e0\u7535\u6c60\u7528\u5b8c\u5f15\u8d77\uff0c\u5e94\u53ca\u65f6\u66f4\u6362\u7535\u6c60\u3002
6.5\u53cc\u6865\u5916\u63a5\u7535\u6e90\u6700\u597d\u91c7\u7528\u5927\u5bb9\u91cf\u5e72\u7535\u6c60\u3001\u84c4\u7535\u6c60\u3001\u6216\u4e13\u7528\u4f4e\u538b\u5927\u7535\u6d41\u6216\u4e13\u7528\u4f4e\u538b\u5927\u7535\u6d41\u7a33\u538b\u7535\u6e90\uff0c\u4e00\u822c\u7a33\u538b\u7535\u6e90\u53ef\u80fd\u8fc7\u51b2\u4f1a\u635f\u574f\u7535\u6865\u3002
6.6\u7535\u6865\u82e5\u957f\u671f\u4e0d\u7528\uff0c\u5219\u5fc5\u987b\u5c06\u6240\u6709\u5e72\u7535\u6c60\u53d6\u51fa\uff0c\u5426\u5219\u7535\u6c60\u6f0f\u6db2\u4f1a\u8150\u8680\u7535\u6865\u3002
6.7\u7535\u6865\u5e94\u8d2e\u653e\u5728\u73af\u5883\u6e29\u5ea610~30\u00b0C\uff0c\u76f8\u5bf9\u6e7f\u5ea625\uff05~80\uff05\u7684\u6761\u4ef6\u4e0b\uff0c\u5ba4\u5185\u7a7a\u6c14\u4e0d\u5e94\u6709\u8150\u8680\u6027\u6c14\u4f53\u548c\u6709\u5bb3\u7269\u8d44\uff0c\u7535\u6865\u4e0d\u5e94\u53d7\u5149\u76f4\u63a5\u7167\u5c04\u3002
直流电桥又分为单臂电桥和双臂电桥两种。单臂电桥又称为惠斯通电桥，用于测量中值电阻（10~1000000Ω）；双臂电桥又称为开尔文电桥，用于测量低值电阻（0.00001~100Ω）。其测量灵敏度及精度都很高。
简单说就是测电阻的。
只不过测的比较精准，
直流双臂电桥的选用
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