{"id":22748,"date":"2023-02-11T15:49:57","date_gmt":"2023-02-11T07:49:57","guid":{"rendered":"http:\/\/www.ehengio.com\/home\/?p=22748"},"modified":"2023-03-08T20:07:55","modified_gmt":"2023-03-08T12:07:55","slug":"pt100-measurement-using-weighing-adc","status":"publish","type":"post","link":"http:\/\/www.ehengio.com\/home\/resource\/experience\/pt100-measurement-using-weighing-adc\/","title":{"rendered":"\u56fd\u4ea7\u79f0\u91cdADC\u6d4b\u91cfPT100\u5fc3\u5f97\u5206\u4eab"},"content":{"rendered":"
\u4e00\u3001\u4e3a\u4ec0\u4e48\u6709\u8fd9\u4e2a\u60f3\u6cd5<\/span><\/strong>\n    \u4e4b\u524d\u4e00\u76f4\u7528ADI\u7684\u82af\u7247\u6765\u6d4b\u91cfPT100\uff0c\u6d4b\u91cf\u6548\u679c\u662f\u4e0d\u9519\u7684\u3002\u4f46\u662f\u6700\u8fd1\u8fdb\u53e3ADC\u82af\u7247\u8d8a\u6765\u8d8a\u96be\u4e70\uff0c\u4ef7\u683c\u4e5f\u8d8a\u6765\u8d8a\u9ad8\u3002\u800c\u56fd\u4ea7\u7684\u79f0\u91cd\u4e13\u7528\u7684ADC\u82af\u7247\u4ef7\u683c\u4fbf\u5b9c\u53c8\u597d\u4e70\u3002\u6709\u6ca1\u6709\u53ef\u80fd\u7528\u56fd\u4ea7\u79f0\u91cdADC\u6765\u6d4b\u91cfPT100\u5462\uff1f<\/span>\n    \u4e4b\u524d\u901b\u8bba\u575b\uff0c\u5c31\u53d1\u73b0\u6709\u7f51\u53cb\u63d0\u51fa\u7c7b\u4f3c\u7684\u9700\u6c42\u3002\u6211\u7b2c\u4e00\u773c\u7684\u60f3\u6cd5\u5c31\u662f\u6ca1\u95ee\u9898\uff0c24\u4f4dADC\u6d4b\u4e00\u4e2aPT100\u8fd8\u4e0d\u5bb9\u6613\u3002\u6df1\u5165\u4e86\u89e3\u4e86\u4e00\u4e0b\uff0c\u5374\u53d1\u73b0\u6709\u5f88\u591a\u95ee\u9898\u3002\u5f53\u7136\u65e2\u7136\u5199\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8fd9\u4e9b\u95ee\u9898\u90fd\u88ab\u89e3\u51b3\u4e86\uff0c\u4e0b\u9762\u5c31\u6765\u8bf4\u4e00\u4e0b\u89e3\u51b3\u95ee\u9898\u7684\u8fc7\u7a0b\u3002<\/span>\n    \u9700\u8981\u8bf4\u660e\u7684\u662f\uff0c\u6211\u5206\u4eab\u7684\u662f\u6211\u627e\u5230\u7684\u4e00\u4e2a\u53ef\u4ee5\u5b9e\u73b0\u7684\u65b9\u6cd5\uff0c\u4e0d\u4ee3\u8868\u6ca1\u6709\u522b\u7684\u65b9\u6cd5\uff0c\u4e5f\u4e0d\u4ee3\u8868\u8fd9\u4e2a\u65b9\u6cd5\u5c31\u662f\u6700\u597d\u7684\u3002\u540c\u65f6\u672c\u6587\u53ea\u662f\u4e00\u4e2a\u7ecf\u9a8c\u5206\u4eab\uff0c\u4e0d\u63d0\u4f9b\u6280\u672f\u652f\u6301\u3002<\/span><\/span>\n\n\n\u4e8c\u3001\u8bbe\u8ba1\u76ee\u6807<\/span><\/strong>\n    \u6211\u7684\u4e60\u60ef\u662f\u4efb\u4f55\u5e94\u7528\u6280\u672f\u7684\u5f00\u53d1\u90fd\u8981\u80fd\u591f\u843d\u5b9e\u5230\u4e00\u4e2a\u5177\u4f53\u7684\u4ea7\u54c1\u4e0a\u3002\u65e2\u7136\u662f\u7528\u4f4e\u6210\u672c\u7684\u56fd\u4ea7\u79f0\u91cdADC\uff0c\u90a3\u4e48\u5c31\u60f3\u8981\u5f00\u53d1\u4e00\u4e2a\u4f4e\u6210\u672c\u3001\u9ad8\u7cbe\u5ea6\u7684PT100\u6d4b\u91cf\u7535\u8def\u3002\u539f\u56e0\u5982\u4e0b\uff1a<\/span>\n    \u9996\u5148\uff0c\u56fd\u4ea7\u79f0\u91cdADC\u4e00\u822c\u53ea\u8981\u4e00\u4e24\u5143\uff0c\u90a3\u4e48\u5468\u56f4\u7684\u5668\u4ef6\u4e5f\u8981\u548c\u8fd9\u4e2a\u6210\u672c\u914d\u5957\u3002\u4e0d\u80fd\u8bf4\uff0c\u7528\u4e86\u4fbf\u5b9c\u7684ADC\u5374\u7528\u51e0\u5757\u94b1\u7684\u9ad8\u7cbe\u5ea6\u8fd0\u653e\u6216\u8005\u7cbe\u5bc6\u7535\u963b\uff0c\u8fd9\u6837\u5c31\u53d1\u6325\u4e0d\u51faADC\u4f4e\u6210\u672c\u7684\u4f18\u52bf\u4e86\u3002<\/span>\n    \u5176\u6b21\uff0c\u76ee\u524d\u5e02\u9762\u4e0a\u6709\u5f88\u591a\u4f4e\u7cbe\u5ea6\u7684PT100\u6d4b\u91cf\u65b9\u6848\uff0c\u7528MCU\u5185\u90e8\u7684ADC\u8fdb\u884c\u6d4b\u91cf\uff0c\u6210\u672c\u975e\u5e38\u4f4e\u3002\u5982\u679c\u6211\u4eec\u7528\u4e86\u72ec\u7acb\u7684ADC\uff0c\u7cbe\u5ea6\u5374\u505a\u4e0d\u9ad8\u3002\u90a3\u4e48\u8fd9\u4e2a\u4ea7\u54c1\u6216\u8005\u8fd9\u4e2a\u6280\u672f\u4e5f\u6ca1\u6709\u5f00\u53d1\u7684\u610f\u4e49\u4e86\u3002\n\n\u4e09\u3001\u6d4b\u91cf\u65b9\u6848<\/strong><\/span>\n    PT100\u5206\u4e3a\u4e24\u7ebf\u5236\u3001\u4e09\u7ebf\u5236\u548c\u56db\u7ebf\u5236\u3002\u4e24\u7ebf\u5236\u6ca1\u6cd5\u5bf9\u5bfc\u7ebf\u7535\u963b\u8fdb\u884c\u8865\u507f\uff0c\u4e0d\u7b26\u5408\u9ad8\u7cbe\u5ea6\u7684\u8981\u6c42\u3002\u56db\u7ebf\u5236PT100\u4e0d\u5e38\u7528\u4e14\u6210\u672c\u9ad8\uff0c\u4e0d\u7b26\u5408\u4f4e\u6210\u672c\u7684\u8981\u6c42\u3002\u6240\u4ee5\u6700\u7ec8\u9009\u7528\u4e09\u7ebf\u5236\u7684\u6d4b\u91cf\u65b9\u5f0f\u3002\u867d\u7136\u4e09\u7ebf\u5236\u6bd4\u8d77\u56db\u7ebf\u5236\u6d4b\u91cf\uff0c\u96be\u5ea6\u8fd8\u8981\u66f4\u9ad8\u4e00\u70b9\u3002\n    \u6d4b\u8bd5\u7535\u6d41\u7684\u9009\u62e9\uff0c\u4e5f\u51b3\u5b9a\u4e86\u7cfb\u7edf\u7684\u7cbe\u5ea6\u3002PT100\u8981\u6c42\u6d4b\u8bd5\u7535\u6d41\u4e0d\u80fd\u5927\u4e8e1mA\uff0c\u5426\u5219\u5c31\u4f1a\u56e0\u4e3a\u81ea\u8eab\u53d1\u70ed\u800c\u5f71\u54cd\u6d4b\u91cf\u7cbe\u5ea6\u3002\u5b9e\u9645\u5e94\u7528\u65f6\uff0c\u6211\u4eec\u5f80\u5f80\u4f1a\u7528\u5230\u6bd4PT100\u7cbe\u5ea6\u66f4\u9ad8\u7684\u5206\u8fa8\u7387\uff0c\u59820.01\u2103\u3002\u90a3\u4e48\u5c31\u8981\u6c42\u6d4b\u8bd5\u7535\u6d41\u66f4\u8981\u5c0f\u4e00\u70b9\u3002\u4f46\u662f\u6d4b\u8bd5\u7535\u6d41\u592a\u5c0f\u7684\u8bdd\uff0c\u4fe1\u53f7\u5c31\u4f1a\u592a\u5c0f\uff0c\u6d4b\u91cf\u4e0d\u5bb9\u6613\uff0c\u540c\u65f6\u4e5f\u5bb9\u6613\u6536\u5230\u5916\u754c\u7684\u5f71\u54cd\u548c\u5e72\u6270\u3002\u6240\u4ee5\u6211\u89c9\u5f970.1mA~1mA\u662f\u6bd4\u8f83\u5408\u9002\u7684\uff0c\u6700\u7ec8\u6211\u9009\u5b9a\u7684\u662f0.5mA\u5de6\u53f3\u6d4b\u8bd5\u7535\u6d41\u3002\n\n\n\u56db\u3001\u5e38\u7528\u7535\u963b\u6d4b\u91cf\u65b9\u6cd5\u7b80\u4ecb<\/strong><\/span>\n    \u5e38\u7528\u7684\u6d4b\u8bd5\u7535\u963b\u65b9\u5f0f\u4e3b\u8981\u6709\u4ee5\u4e0b\u4e09\u79cd\uff1a\n        1\u3001\u7ed9\u5f85\u6d4b\u7535\u963b\u4e00\u4e2a\u6052\u5b9a\u7684\u7535\u6d41\uff0c\u7136\u540e\u6d4b\u4e24\u7aef\u7684\u7535\u538b\u3002\n        2\u3001\u5c06\u5f85\u6d4b\u7535\u963b\u548c\u57fa\u51c6\u7535\u963b\u4e32\u8054\u540e\uff0c\u4f9b\u7ed9\u4e00\u4e2a\u6052\u5b9a\u7684\u7535\u538b\uff0c\u6d4b\u4e24\u8005\u4e4b\u95f4\u7684\u7535\u538b\u6bd4\u3002\n        3\u3001\u5c06\u5f85\u6d4b\u7535\u963b\u548c\u57fa\u51c6\u7535\u963b\u4e32\u8054\u540e\uff0c\u4f9b\u7ed9\u4e00\u4e2a\u6052\u5b9a\u7684\u7535\u6d41\uff0c\u6d4b\u4e24\u8005\u4e4b\u95f4\u7684\u7535\u538b\u6bd4\u3002\n    \u540e\u4e24\u79cd\u7edf\u79f0\u4e3a\u6bd4\u4f8b\u6d4b\u91cf\u3002\u6bd4\u4f8b\u6d4b\u91cf\u65f6\uff0c\u4e00\u822c\u662f\u628a\u57fa\u51c6\u7535\u963b\u4e0a\u7684\u7535\u538b\u4f5c\u4e3aADC\u7684\u57fa\u51c6\u7535\u538b\uff0c\u7136\u540e\u53bb\u6d4b\u91cf\u5f85\u6d4b\u7535\u963b\u4e0a\u7684\u7535\u538b\uff0c\u8fd9\u6837\u6d4b\u91cf\u5230\u7684AD\u7801\u5c31\u662f\u548c\u5f85\u6d4b\u7535\u963b\u6210\u6b63\u6bd4\u7684\uff0c\u5f88\u5bb9\u6613\u8ba1\u7b97\u3002\u540c\u65f6\u53ea\u8981\u4fdd\u8bc1\u57fa\u51c6\u7535\u963b\u7684\u7cbe\u5ea6\uff0c\u5c31\u53ef\u5b9e\u73b0\u9ad8\u7cbe\u5ea6\u6d4b\u91cf\u3002\n    \u8fd9\u4e24\u79cd\u65b9\u6848\uff0c\u6ca1\u4ec0\u4e48\u672c\u8d28\u7684\u533a\u522b\uff0c\u5982\u679c\u7cfb\u7edf\u4e2d\u6709\u514d\u8d39\u7684\u7535\u6d41\u6e90\uff0c\u6bd4\u5982\u67d0\u4e9bADC\u82af\u7247\u4f1a\u63d0\u4f9b\u7535\u6d41\u6e90\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u4f7f\u7528\u7b2c\u4e09\u79cd\u65b9\u6848\u3002\u6bd5\u7adf\u6052\u6d41\u7684\u8bdd\uff0c\u5bf9\u4e8e\u63a7\u5236\u5f85\u6d4b\u7535\u963b\u7684\u53d1\u70ed\uff0c\u548c\u8865\u507fADC\u7684\u8f93\u5165\u7535\u6d41\u8fd8\u662f\u6709\u4e00\u5b9a\u597d\u5904\u7684\u3002\u5728\u672c\u6b21\u8bbe\u8ba1\u4e2d\uff0c\u56e0\u4e3a\u7528\u7684ADC\u82af\u7247\u81ea\u5e26\u7684LDO\u53ef\u4ee5\u5b9e\u73b0\u6052\u6d41\u6e90\uff0c\u4e00\u5f00\u59cb\u91c7\u7528\u4e86\u65b9\u6848\u4e09\u7684\u6d4b\u91cf\u65b9\u5f0f\u3002\u53ef\u60dc\u5b9e\u9645\u505a\u4e0b\u6765\uff0c\u8fd9\u79cd\u65b9\u6848\u7a33\u5b9a\u6027\u4e0d\u884c\uff0c\u6700\u540e\u8fd8\u662f\u91c7\u53d6\u4e86\u65b9\u6848\u4e8c\u6052\u538b\u6bd4\u4f8b\u6d4b\u91cf\u3002\n\n\u4e94\u3001\u82af\u7247\u9009\u578b<\/strong><\/span>\n    \u5982\u524d\u6240\u8ff0\uff0c\u672c\u6b21\u8bbe\u8ba1\u6211\u4eec\u8981\u5b9e\u73b0\u4e00\u4e2a\u4f4e\u6210\u672c\u9ad8\u7cbe\u5ea6\u7684\u4e09\u7ebf\u5236PT100\u7684\u6d4b\u91cf\u7535\u8def\uff0c\u540c\u65f6\u8fd9\u9897ADC\u53c8\u8981\u5bb9\u6613\u8d2d\u4e70\u3002\u4e8e\u662f\u6211\u5c31\u5230\u5404\u4e2a\u82af\u7247\u7f51\u7ad9\u4e0a\uff0c\u53bb\u627e\u4e86\u4e00\u4e9b\u6709\u8d27\u4e14\u4ef7\u683c\u5408\u9002\u7684\u82af\u7247\uff0c\u628a\u76f8\u5173\u7684\u6307\u6807\u5217\u5728\u4e0b\u8868\u3002<\/span>\n<\/span><\/span><\/pre>\n\n\n\n\n\n\n\n\n\n\n
\n
\u578b\u53f7<\/span><\/span><\/div>\n<\/td>\n
\n
\n
\u901a\u9053\u6570<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
\u653e\u5927\u500d\u6570<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
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\u57fa\u51c6<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
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\n
\u4ef7\u683c<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
\u5176\u4ed6<\/span><\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
HX717<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
2<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
8\uff0c64\uff0c128<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
\u4e0e\u7535\u538b\u8f93\u51fa\u5171\u7528<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
2.28<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
\u542bLDO<\/span><\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
HX711<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
2<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
32\uff0c64\uff0c128<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
\u4e0e\u7535\u538b\u8f93\u51fa\u5171\u7528<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
2.14<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
HX712<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
128<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
\u72ec\u7acb\u57fa\u51c6<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
1.4<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
HX710<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
128<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
\u72ec\u7acb\u5355\u7aef\u57fa\u51c6<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
1.15<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
CS1237<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
1\uff0c2\uff0c64\uff0c128<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
\u72ec\u7acb\u57fa\u51c6<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
1.43<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
CS1238<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
2<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
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\n
1\uff0c2\uff0c64\uff0c128<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
\u72ec\u7acb\u57fa\u51c6<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
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3.43<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
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<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
TM7711<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
128<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
\u72ec\u7acb\u5355\u7aef\u57fa\u51c6<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
\n
\n
1.66<\/span><\/span><\/div>\n<\/div>\n<\/td>\n
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\n
<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
  \u00a0\n    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