{"id":1493,"date":"2021-05-24T21:52:46","date_gmt":"2021-05-24T13:52:46","guid":{"rendered":"http:\/\/mgspace.wiki\/docs\/?post_type=docs&p=1493"},"modified":"2021-06-18T14:48:55","modified_gmt":"2021-06-18T06:48:55","slug":"%e8%b6%85%e5%a3%b0%e6%b3%a2%e4%bc%a0%e6%84%9f%e5%99%a8","status":"publish","type":"docs","link":"http:\/\/mgspace.wiki\/docs\/?docs=%e8%b6%85%e5%a3%b0%e6%b3%a2%e4%bc%a0%e6%84%9f%e5%99%a8","title":{"rendered":"\u8d85\u58f0\u6ce2\u4f20\u611f\u5668"},"content":{"rendered":"\n

HC-SR04 \u8d85\u58f0\u6ce2\u4f20\u611f\u5668\u5982\u4f55\u5de5\u4f5c\u5e76\u4e0e Arduino \u8fde\u63a5<\/h1>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u4f7f\u7528 HC-SR04 \u8d85\u58f0\u6ce2\u8ddd\u79bb\u4f20\u611f\u5668\u4e3a\u60a8\u7684\u4e0b\u4e00\u4e2a Arduino \u9879\u76ee\u63d0\u4f9b\u52a8\u529b\uff0c\u8be5\u4f20\u611f\u5668\u53ef\u4ee5\u62a5\u544a\u6700\u8fdc 13 \u82f1\u5c3a\u8fdc\u7684\u7269\u4f53\u8303\u56f4\u3002\u5982\u679c\u4f60\u60f3\u907f\u514d\u4f60\u7684\u673a\u5668\u4eba\u649e\u5899\uff0c\u8fd9\u771f\u662f\u4e2a\u597d\u4fe1\u606f\uff01\u5b83\u4eec\u529f\u8017\u4f4e\uff08\u9002\u7528\u4e8e\u7535\u6c60\u4f9b\u7535\u7684\u8bbe\u5907\uff09\u3001\u4ef7\u683c\u4f4e\u5ec9\u3001\u6613\u4e8e\u8fde\u63a5\u5e76\u4e14\u5728\u7231\u597d\u8005\u4e2d\u975e\u5e38\u53d7\u6b22\u8fce\u3002\u4f5c\u4e3a\u5956\u52b1\uff0c\u5b83\u751a\u81f3\u770b\u8d77\u6765\u5f88\u9177\uff0c\u5c31\u50cf\u60a8\u6700\u65b0\u673a\u5668\u4eba\u53d1\u660e\u7684\u4e00\u53cc Wall-E \u673a\u5668\u4eba\u773c\u775b\uff01<\/p>\n\n\n\n

\u4ec0\u4e48\u662f\u8d85\u58f0\u6ce2\uff1f<\/strong><\/h3>\n\n\n\n

\u8d85\u58f0\u6ce2\u662f\u9891\u7387\u9ad8\u4e8e\u4eba\u7c7b\u542c\u89c9\u542c\u89c9\u6781\u9650\u7684\u9ad8\u9891\u58f0\u6ce2\u3002<\/p>\n\n\n\n

\"\u8d85\u58f0\u6ce2\u9891\u7387\u8303\u56f4\u8c31\"\/<\/figure><\/div>\n\n\n\n

\u4eba\u8033\u53ef\u4ee5\u542c\u5230\u4ece\u6bcf\u79d2\u7ea6 20 \u6b21\uff08\u6df1\u6c89\u7684\u9686\u9686\u58f0\uff09\u5230\u7ea6 20,000 \u6b21\uff08\u9ad8\u97f3\u54e8\u58f0\uff09\u8303\u56f4\u5185\u632f\u52a8\u7684\u58f0\u6ce2\u3002\u7136\u800c\uff0c\u8d85\u58f0\u6ce2\u7684\u9891\u7387\u8d85\u8fc7 20,000 Hz\uff0c\u56e0\u6b64\u4eba\u7c7b\u662f\u542c\u4e0d\u89c1\u7684\u3002<\/p>\n\n\n\n

HC-SR04 \u786c\u4ef6\u6982\u8ff0<\/h2>\n\n\n\n

HC-SR04 \u8d85\u58f0\u6ce2\u8ddd\u79bb\u4f20\u611f\u5668\u7684\u6838\u5fc3\u7531\u4e24\u4e2a\u8d85\u58f0\u6ce2\u6362\u80fd<\/a>\u5668\u7ec4\u6210\u3002\u4e00\u4e2a\u5145\u5f53\u53d1\u5c04\u5668\uff0c\u5c06\u7535\u4fe1\u53f7\u8f6c\u6362\u4e3a 40 KHz \u7684\u8d85\u58f0\u6ce2\u8109\u51b2\u3002\u63a5\u6536\u5668\u4fa6\u542c\u4f20\u8f93\u7684\u8109\u51b2\u3002\u5982\u679c\u5b83\u63a5\u6536\u5230\u5b83\u4eec\uff0c\u5b83\u4f1a\u4ea7\u751f\u4e00\u4e2a\u8f93\u51fa\u8109\u51b2\uff0c\u5176\u5bbd\u5ea6\u53ef\u7528\u4e8e\u786e\u5b9a\u8109\u51b2\u884c\u8fdb\u7684\u8ddd\u79bb\u3002\u50cf\u9985\u997c\u4e00\u6837\u7b80\u5355\uff01<\/p>\n\n\n\n

\u8be5\u4f20\u611f\u5668\u4f53\u79ef\u5c0f\uff0c\u6613\u4e8e\u5728\u4efb\u4f55\u673a\u5668\u4eba\u9879\u76ee\u4e2d\u4f7f\u7528\uff0c\u5e76\u63d0\u4f9b 2 \u5398\u7c73\u81f3 400 \u5398\u7c73\uff08\u7ea6 1 \u82f1\u5bf8\u81f3 13 \u82f1\u5c3a\uff09\u7684\u51fa\u8272\u975e\u63a5\u89e6\u8303\u56f4\u68c0\u6d4b\uff0c\u7cbe\u5ea6\u4e3a 3 \u6beb\u7c73\u3002\u7531\u4e8e\u5b83\u5728 5 \u4f0f\u7535\u538b\u4e0b\u5de5\u4f5c\uff0c\u56e0\u6b64\u53ef\u4ee5\u76f4\u63a5\u8fde\u63a5\u5230 Arduino \u6216\u4efb\u4f55\u5176\u4ed6 5V \u903b\u8f91\u5fae\u63a7\u5236\u5668\u3002<\/p>\n\n\n\n

\u4ee5\u4e0b\u662f\u5b8c\u6574\u7684\u89c4\u683c\uff1a<\/p>\n\n\n\n

\u5de5\u4f5c\u7535\u538b<\/td>\u76f4\u6d415V<\/td><\/tr>
\u5de5\u4f5c\u7535\u6d41<\/td>15mA<\/td><\/tr>
\u5de5\u4f5c\u9891\u7387<\/td>40KHz<\/td><\/tr>
\u6700\u5927\u8303\u56f4<\/td>4\u7c73<\/td><\/tr>
\u6700\u5c0f\u8303\u56f4<\/td>2\u5398\u7c73<\/td><\/tr>
\u6d4b\u8ddd\u7cbe\u5ea6<\/td>3mm<\/td><\/tr>
\u6d4b\u91cf\u89d2\u5ea6<\/td>15\u5ea6<\/td><\/tr>
\u89e6\u53d1\u8f93\u5165\u4fe1\u53f7<\/td>10\u00b5S TTL \u8109\u51b2<\/td><\/tr>
\u5c3a\u5bf8<\/td>45 x 20 x 15 \u6beb\u7c73<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

HC-SR04 \u8d85\u58f0\u6ce2\u4f20\u611f\u5668\u5f15\u811a\u6392\u5217<\/h2>\n\n\n\n

\u6211\u4eec\u6765\u770b\u770b\u5b83\u7684Pinout\u3002<\/p>\n\n\n\n

\"HC-SR04<\/figure><\/div>\n\n\n\n

\u7535\u538b\u4e92\u611f\u5668 \u662f HC-SR04 \u8d85\u58f0\u6ce2\u8ddd\u79bb\u4f20\u611f\u5668\u7684\u7535\u6e90\uff0c\u6211\u4eec\u5c06\u5176\u8fde\u63a5\u5230 Arduino \u4e0a\u7684 5V \u5f15\u811a\u3002<\/p>\n\n\n\n

\u89e6\u53d1\uff08\u89e6\u53d1\u5668\uff09 \u5f15\u811a\u7528\u4e8e\u89e6\u53d1\u8d85\u58f0\u6ce2\u8109\u51b2\u3002<\/p>\n\n\n\n

\u56de\u58f0\u5f53\u63a5\u6536\u5230\u53cd\u5c04\u4fe1\u53f7\u65f6\uff0c\u5f15\u811a\u4f1a\u4ea7\u751f\u4e00\u4e2a\u8109\u51b2\u3002\u8109\u51b2\u7684\u957f\u5ea6\u4e0e\u68c0\u6d4b\u5230\u4f20\u8f93\u4fe1\u53f7\u6240\u7528\u7684\u65f6\u95f4\u6210\u6b63\u6bd4\u3002<\/p>\n\n\n\n

\u5730\u7ebf \u5e94\u8be5\u8fde\u63a5\u5230Arduino\u7684\u5730\u3002<\/p>\n\n\n\n

HC-SR04\u8d85\u58f0\u6ce2\u8ddd\u79bb\u4f20\u611f\u5668\u5982\u4f55\u5de5\u4f5c\uff1f<\/h2>\n\n\n\n

\u5f53\u4e00\u4e2a\u6301\u7eed\u65f6\u95f4\u81f3\u5c11\u4e3a 10 \u00b5S\uff0810 \u5fae\u79d2\uff09\u7684\u8109\u51b2\u65bd\u52a0\u5230\u89e6\u53d1\u5f15\u811a\u65f6\uff0c\u4e00\u5207\u5c31\u5f00\u59cb\u4e86\u3002\u4f5c\u4e3a\u54cd\u5e94\uff0c\u4f20\u611f\u5668\u4ee5 40 KHz \u7684\u9891\u7387\u4f20\u8f93 8 \u4e2a\u8109\u51b2\u7684\u58f0\u6ce2\u3002\u8fd9\u79cd 8 \u8109\u51b2\u6a21\u5f0f\u4f7f\u6765\u81ea\u8bbe\u5907\u7684\u201c\u8d85\u58f0\u6ce2\u7279\u5f81\u201d\u72ec\u4e00\u65e0\u4e8c\uff0c\u4f7f\u63a5\u6536\u5668\u80fd\u591f\u5c06\u4f20\u8f93\u6a21\u5f0f\u4e0e\u73af\u5883\u8d85\u58f0\u6ce2\u566a\u58f0\u533a\u5206\u5f00\u6765\u3002<\/p>\n\n\n\n

\u516b\u4e2a\u8d85\u58f0\u6ce2\u8109\u51b2\u5728\u7a7a\u6c14\u4e2d\u8fdc\u79bb\u53d1\u5c04\u5668\u4f20\u64ad\u3002\u540c\u65f6\uff0cEcho \u5f15\u811a\u53d8\u4e3a\u9ad8\u7535\u5e73\u4ee5\u5f00\u59cb\u5f62\u6210\u56de\u58f0\u4fe1\u53f7\u7684\u5f00\u5934\u3002<\/p>\n\n\n\n

\u5982\u679c\u8fd9\u4e9b\u8109\u51b2\u6ca1\u6709\u88ab\u53cd\u5c04\u56de\u6765\uff0c\u90a3\u4e48\u56de\u58f0\u4fe1\u53f7\u5c06\u5728 38 \u6beb\u79d2\uff0838 \u6beb\u79d2\uff09\u540e\u8d85\u65f6\u5e76\u8fd4\u56de\u4f4e\u7535\u5e73\u3002\u56e0\u6b64\uff0c\u4e00\u4e2a 38 \u6beb\u79d2\u7684\u8109\u51b2\u8868\u793a\u4f20\u611f\u5668\u8303\u56f4\u5185\u6ca1\u6709\u969c\u788d\u7269\u3002<\/p>\n\n\n\n

\"HC-SR04<\/figure><\/div>\n\n\n\n

\u5982\u679c\u8fd9\u4e9b\u8109\u51b2\u88ab\u53cd\u5c04\u56de\u6765\uff0c\u4e00\u65e6\u63a5\u6536\u5230\u4fe1\u53f7\uff0cEcho \u5f15\u811a\u5c31\u4f1a\u53d8\u4f4e\u3002\u8fd9\u4f1a\u4ea7\u751f\u4e00\u4e2a\u5bbd\u5ea6\u5728 150 \u00b5S \u5230 25 mS \u4e4b\u95f4\u53d8\u5316\u7684\u8109\u51b2\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u63a5\u6536\u4fe1\u53f7\u6240\u7528\u7684\u65f6\u95f4\u3002<\/p>\n\n\n\n

\"HC-SR04<\/figure><\/div>\n\n\n\n

\u7136\u540e\u4f7f\u7528\u63a5\u6536\u5230\u7684\u8109\u51b2\u5bbd\u5ea6\u6765\u8ba1\u7b97\u5230\u53cd\u5c04\u7269\u4f53\u7684\u8ddd\u79bb\u3002\u8fd9\u53ef\u4ee5\u4f7f\u7528\u6211\u4eec\u5728\u9ad8\u4e2d\u5b66\u5230\u7684\u7b80\u5355\u7684\u8ddd\u79bb-\u901f\u5ea6-\u65f6\u95f4\u65b9\u7a0b\u6765\u8ba1\u7b97\u3002\u5982\u679c\u60a8\u5fd8\u8bb0\u4e86\uff0c\u8bb0\u4f4f\u8ddd\u79bb\u3001\u901f\u5ea6\u548c\u65f6\u95f4\u65b9\u7a0b\u7684\u4e00\u79cd\u7b80\u5355\u65b9\u6cd5\u662f\u5c06\u5b57\u6bcd\u653e\u5165\u4e09\u89d2\u5f62\u4e2d\u3002<\/p>\n\n\n\n

\"\u8ddd\u79bb\u901f\u5ea6\u65f6\u95f4\u516c\u5f0f\u4e09\u89d2\u5f62\"\/<\/figure><\/div>\n\n\n\n

\u8ba9\u6211\u4eec\u4e3e\u4e00\u4e2a\u4f8b\u5b50\u6765\u66f4\u6e05\u695a\u3002\u5047\u8bbe\u6211\u4eec\u5728\u4f20\u611f\u5668\u524d\u9762\u6709\u4e00\u4e2a\u672a\u77e5\u8ddd\u79bb\u7684\u7269\u4f53\uff0c\u6211\u4eec\u5728 Echo \u5f15\u811a\u4e0a\u63a5\u6536\u5230\u4e00\u4e2a\u5bbd\u5ea6\u4e3a 500 \u00b5S \u7684\u8109\u51b2\u3002\u73b0\u5728\u8ba9\u6211\u4eec\u8ba1\u7b97\u7269\u4f53\u79bb\u4f20\u611f\u5668\u7684\u8ddd\u79bb\u3002\u6211\u4eec\u5c06\u4f7f\u7528\u4ee5\u4e0b\u7b49\u5f0f\u3002<\/p>\n\n\n\n

\u8ddd\u79bb = \u901f\u5ea6 x \u65f6\u95f4<\/p>\n\n\n\n

\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u6709\u65f6\u95f4\u503c\uff0c\u5373 500 \u00b5s\uff0c\u6211\u4eec\u77e5\u9053\u901f\u5ea6\u3002\u6211\u4eec\u6709\u4ec0\u4e48\u901f\u5ea6\uff1f\u5f53\u7136\u662f\u97f3\u901f\uff01\u5176 340 m\/s\u3002\u6211\u4eec\u5fc5\u987b\u5c06\u58f0\u901f\u8f6c\u6362\u4e3a cm\/\u00b5s \u624d\u80fd\u8ba1\u7b97\u8ddd\u79bb\u3002\u5728 Google \u4e0a\u5feb\u901f\u641c\u7d22\u201c\u4ee5\u5398\u7c73\/\u5fae\u79d2\u4e3a\u5355\u4f4d\u7684\u58f0\u901f\u201d\u4f1a\u8bf4\u5b83\u662f 0.034 \u5398\u7c73\/\u5fae\u79d2\u3002\u4f60\u53ef\u4ee5\u505a\u6570\u5b66\uff0c\u4f46\u641c\u7d22\u5b83\u66f4\u5bb9\u6613\u3002\u4e0d\u7ba1\u600e\u6837\uff0c\u6709\u4e86\u8fd9\u4e9b\u4fe1\u606f\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u8ba1\u7b97\u51fa\u8ddd\u79bb\u4e86\uff01<\/p>\n\n\n\n

\u8ddd\u79bb = 0.034 \u5398\u7c73\/\u5fae\u79d2 x 500 \u5fae\u79d2<\/p>\n\n\n\n

\u4f46\u8fd9\u8fd8\u6ca1\u6709\u5b8c\u6210\uff01\u8bf7\u8bb0\u4f4f\uff0c\u8109\u51b2\u8868\u793a\u4fe1\u53f7\u53d1\u51fa\u5e76\u53cd\u5c04\u56de\u6765\u6240\u9700\u7684\u65f6\u95f4\uff0c\u56e0\u6b64\u4e3a\u4e86\u83b7\u5f97\u8ddd\u79bb\uff0c\u60a8\u9700\u8981\u5c06\u7ed3\u679c\u5206\u6210\u4e24\u534a\u3002<\/p>\n\n\n\n

\u8ddd\u79bb = (0.034 cm\/\u00b5s x 500 \u00b5s) \/ 2<\/p>\n\n\n\n

\u8ddd\u79bb = 8.5 \u5398\u7c73<\/p>\n\n\n\n

\u6240\u4ee5\uff0c\u73b0\u5728\u6211\u4eec\u77e5\u9053\u7269\u4f53\u8ddd\u79bb\u4f20\u611f\u56688.5 \u5398\u7c73<\/strong>\u3002<\/p>\n\n\n\n

\u63a5\u7ebf \u2013 \u5c06 HC-SR04 \u8fde\u63a5\u5230 Arduino Uno<\/h2>\n\n\n\n

\u73b0\u5728\u6211\u4eec\u5df2\u7ecf\u5b8c\u5168\u4e86\u89e3 HC-SR04 \u8d85\u58f0\u6ce2\u8ddd\u79bb\u4f20\u611f\u5668\u7684\u5de5\u4f5c\u539f\u7406\uff0c\u6211\u4eec\u53ef\u4ee5\u5f00\u59cb\u5c06\u5b83\u8fde\u63a5\u5230\u6211\u4eec\u7684 Arduino\uff01<\/p>\n\n\n\n

\u5c06 HC-SR04 \u8fde\u63a5\u5230 Arduino \u975e\u5e38\u7b80\u5355\u3002\u9996\u5148\u5c06\u4f20\u611f\u5668\u653e\u5728\u9762\u5305\u677f\u4e0a\u3002\u5c06 VCC \u5f15\u811a\u8fde\u63a5\u5230 Arduino \u4e0a\u7684 5V \u5f15\u811a\uff0c\u5e76\u5c06 GND \u5f15\u811a\u8fde\u63a5\u5230 Arduino \u4e0a\u7684\u63a5\u5730\u5f15\u811a\u3002<\/p>\n\n\n\n

\u5b8c\u6210\u540e\uff0c\u60a8\u5e94\u8be5\u770b\u5230\u7c7b\u4f3c\u4e8e\u4e0b\u56fe\u6240\u793a\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n

\"\u5e26\u6709
\u5c06 HC-SR04 \u8d85\u58f0\u6ce2\u4f20\u611f\u5668\u8fde\u63a5\u5230 Arduino UNO \u2013 \u6b63\u5e38\u6a21\u5f0f<\/figcaption><\/figure><\/div>\n\n\n\n

\u6240\u4ee5\u73b0\u5728\u6211\u4eec\u5df2\u7ecf\u8fde\u63a5\u4e86\u6211\u4eec\u7684\u8d85\u58f0\u6ce2\u8ddd\u79bb\u4f20\u611f\u5668\uff0c\u662f\u65f6\u5019\u7f16\u5199\u4e00\u4e9b\u4ee3\u7801\u5e76\u8fdb\u884c\u6d4b\u8bd5\u4e86\u3002<\/p>\n\n\n\n

Arduino \u4ee3\u7801\u2014\u2014\u4f7f\u7528 NewPing \u5e93<\/h2>\n\n\n\n

\u6211\u4eec\u5c06\u4f7f\u7528\u4e00\u4e2a\u7279\u6b8a\u7684\u5e93\uff0c\u800c\u4e0d\u662f\u624b\u52a8\u89e6\u53d1\u8d85\u58f0\u6ce2\u4f20\u611f\u5668\u5e76\u6d4b\u91cf\u63a5\u6536\u5230\u7684\u4fe1\u53f7\u8109\u51b2\u5bbd\u5ea6\u3002\u6709\u5f88\u591a\u53ef\u7528\u7684\uff0c\u6700\u901a\u7528\u7684\u662f\u4e00\u79cd\u53eb\u505a\u201c NewPing<\/a> \u201d\u7684\u3002<\/p>\n\n\n\n

\u9996\u5148\u901a\u8fc7\u8bbf\u95eeBitbucket \u5b58\u50a8<\/a>\u5e93\u4e0b\u8f7d\u5e93\uff0c\u6216\u8005\u53ea\u9700\u5355\u51fb\u6b64\u6309\u94ae\u5373\u53ef\u4e0b\u8f7d zip\uff1aNewPing_v1.9.0.zip<\/a><\/p>\n\n\n\n

\u8981\u5b89\u88c5\u5b83\uff0c\u8bf7\u6253\u5f00 Arduino IDE\uff0c\u8f6c\u5230 Sketch > Include Library > Add .ZIP Library\uff0c\u7136\u540e\u9009\u62e9\u60a8\u521a\u521a\u4e0b\u8f7d\u7684 NewPing ZIP \u6587\u4ef6\u3002\u5982\u679c\u60a8\u9700\u8981\u6709\u5173\u5b89\u88c5\u5e93\u7684\u66f4\u591a\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u8bbf\u95ee\u6b64\u5b89\u88c5 Arduino \u5e93\u6559\u7a0b\u3002<\/p>\n\n\n\n

NewPing \u5e93\u975e\u5e38\u5148\u8fdb\uff0c\u5b83\u5927\u5927\u63d0\u9ad8\u4e86\u6211\u4eec\u539f\u59cb\u8349\u56fe\u7684\u51c6\u786e\u6027\u3002\u5b83\u8fd8\u540c\u65f6\u652f\u6301\u591a\u8fbe15\u4e2a\u8d85\u58f0\u6ce2\u4f20\u611f\u5668\uff0c\u53ef\u4ee5\u76f4\u63a5\u4ee5\u5398\u7c73\u3001\u82f1\u5bf8\u6216\u6301\u7eed\u65f6\u95f4\u4e3a\u5355\u4f4d\u8f93\u51fa\u3002<\/p>\n\n\n\n

\u8fd9\u662f\u6211\u4eec\u91cd\u5199\u7684\u8349\u56fe\u4ee5\u4f7f\u7528 NewPing \u5e93\uff1a<\/p>\n\n\n\n

\/\/ This uses Serial Monitor to display Range Finder distance readings\n\n\/\/ Include NewPing Library\n#include \"NewPing.h\"\n\n\/\/ Hook up HC-SR04 with Trig to Arduino Pin 9, Echo to Arduino pin 10\n#define TRIGGER_PIN 9\n#define ECHO_PIN 10\n\n\/\/ Maximum distance we want to ping for (in centimeters).\n#define MAX_DISTANCE 400\t\n\n\/\/ NewPing setup of pins and maximum distance.\nNewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);\nfloat duration, distance;\n\nvoid setup() \n{\n\tSerial.begin(9600);\n}\n\nvoid loop() \n{\n\t\/\/ Send ping, get distance in cm\n\tdistance = sonar.ping_cm();\n\t\n\t\/\/ Send results to Serial Monitor\n\tSerial.print(\"Distance = \");\n\t\n\tif (distance >= 400 || distance <= 2) \n\t{\n\t\tSerial.println(\"Out of range\");\n\t}\n\telse \n\t{\n\t\tSerial.print(distance);\n\t\tSerial.println(\" cm\");\n\t}\n\tdelay(500);\n}<\/pre>\n\n\n\n
\"HC-SR04
\u4e32\u884c\u76d1\u89c6\u5668\u4e0a\u7684\u8f93\u51fa<\/figcaption><\/figure><\/div>\n\n\n\n
\u4ee3\u7801\u8bf4\u660e\uff1a<\/h3>\n\n\n\n
\u4e0a\u9762\u7684\u8349\u56fe\u5f88\u7b80\u5355\uff0c\u6548\u679c\u5f88\u597d\uff0c\u4f46\u5b83\u7684\u5206\u8fa8\u7387\u53ea\u6709\u4e00\u5398\u7c73\u3002\u5982\u679c\u60a8\u60f3\u6062\u590d\u5c0f\u6570\u70b9\u503c\uff0c\u60a8\u53ef\u4ee5\u5728\u6301\u7eed\u65f6\u95f4\u6a21\u5f0f\u800c\u4e0d\u662f\u8ddd\u79bb\u6a21\u5f0f\u4e0b\u4f7f\u7528 NewPing\u3002\u4f60\u9700\u8981\u66f4\u6362\u8fd9\u4e00\u884c<\/p>\n\n\n\n
\/\/ Send ping, get distance in cm\ndistance = sonar.ping_cm();<\/pre>\n\n\n\n
\u7528\u4e0b\u9762\u7684\u7ebf<\/p>\n\n\n\n
duration = sonar.ping();\ndistance = (duration \/ 2) * 0.0343;<\/pre>\n\n\n\n
\u4e3a\u4e86\u5c06\u60a8\u7684 HC-SR04 \u7684\u51c6\u786e\u6027\u63d0\u9ad8\u5230\u4e00\u4e2a\u65b0\u7684\u6c34\u5e73\uff0cNewPing \u5e93\u4e2d\u6709\u53e6\u4e00\u4e2a\u79f0\u4e3a\u201c\u8fed\u4ee3\u201d\u7684\u529f\u80fd\u3002\u8fed\u4ee3\u610f\u5473\u7740\u4e0d\u6b62\u4e00\u6b21\u5730\u91cd\u590d\u67d0\u4ef6\u4e8b\uff0c\u800c\u8fd9\u6b63\u662f\u8fed\u4ee3\u6a21\u5f0f\u6240\u505a\u7684\u3002\u5b83\u9700\u8981\u591a\u6b21\u6301\u7eed\u65f6\u95f4\u6d4b\u91cf\u800c\u4e0d\u662f\u4e00\u6b21\uff0c\u4e22\u5f03\u4efb\u4f55\u65e0\u6548\u8bfb\u6570\uff0c\u7136\u540e\u5bf9\u5269\u4f59\u7684\u8bfb\u6570\u6c42\u5e73\u5747\u503c\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u9700\u8981 5 \u4e2a\u8bfb\u6570\uff0c\u4f46\u60a8\u5b9e\u9645\u4e0a\u53ef\u4ee5\u6307\u5b9a\u4efb\u610f\u6570\u91cf\u7684\u8bfb\u6570\u3002<\/p>\n\n\n\n
int iterations = 5;\nduration = sonar.ping_median(iterations);<\/pre>\n\n\n\n
Arduino\u9879\u76ee<\/h2>\n\n\n\n
\u975e\u63a5\u89e6\u5f0f\u6d4b\u8ddd\u4eea<\/h2>\n\n\n\n
\u8ba9\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u5feb\u901f\u9879\u76ee\u6765\u6f14\u793a\u5982\u4f55\u5c06\u7b80\u5355\u7684\u8d85\u58f0\u6ce2\u4f20\u611f\u5668\u53d8\u6210\u590d\u6742\u7684\u975e\u63a5\u89e6\u5f0f\u6d4b\u8ddd\u4eea<\/strong>\u3002\u5728\u8fd9\u4e2a\u9879\u76ee\u4e2d\uff0c\u6211\u4eec\u5c06\u4f7f\u7528\u4e00\u4e2a 16\u00d72 \u5b57\u7b26 LCD \u6765\u663e\u793a\u4e00\u4e2a\u6c34\u5e73\u6761\uff0c\u4ee5\u56fe\u5f62\u65b9\u5f0f\u8868\u793a\u4e0e\u5e95\u7ebf\u4e0a\u7684\u503c\u7684\u5bf9\u8c61\u7684\u8ddd\u79bb\u3002<\/p>\n\n\n\n
\u5982\u679c\u60a8\u4e0d\u719f\u6089 16\u00d72 \u5b57\u7b26 LCD\uff0c\u8bf7\u8003\u8651\u9605\u8bfb\uff08\u81f3\u5c11\u7565\u8bfb\uff09\u4ee5\u4e0b\u6559\u7a0b\u3002<\/a>\u5c06 16\u00d72 \u5b57\u7b26 LCD \u6a21\u5757\u4e0e Arduino \u63a5\u53e3<\/a>\u60f3\u8ba9\u60a8\u7684 Arduino \u9879\u76ee\u663e\u793a\u72b6\u6001\u6d88\u606f\u6216\u4f20\u611f\u5668\u8bfb\u6570\u5417\uff1f\u90a3\u4e48\u8fd9\u4e9b\u6db2\u6676\u663e\u793a\u5668\u53ef\u80fd\u662f\u5b8c\u7f8e\u7684\u9009\u62e9\u3002\u5b83\u4eec\u975e\u5e38\u5e38\u89c1\uff0c\u800c\u4e14…<\/p>\n\n\n\n
\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u9700\u8981\u8fde\u63a5\u5230 LCD\uff0c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n\n\n\n
\"\u5e26\u6709
\u5c06 HC-SR04 \u8d85\u58f0\u6ce2\u4f20\u611f\u5668\u548c 16\u00d72 LCD \u8fde\u63a5\u5230 Arduino UNO<\/figcaption><\/figure>\n\n\n\n
\u5728\u6211\u4eec\u5f00\u59cb\u4e0a\u4f20\u4ee3\u7801\u548c\u4f7f\u7528\u4f20\u611f\u5668\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u5b89\u88c5\u540d\u4e3aLCDBarGraph<\/a>\u7684\u5e93\u3002\u8be5\u5e93\u6709\u52a9\u4e8e\u5728 LCD \u4e0a\u7ed8\u5236\u6c34\u5e73\u6761\u5f62\u56fe\uff0c\u5176\u4e2d\u6761\u5f62\u7684\u957f\u5ea6\u4e0e\u63d0\u4f9b\u7684\u503c\u6210\u6b63\u6bd4\u3002<\/p>\n\n\n\n
\u9996\u5148\u901a\u8fc7\u8bbf\u95eeArduino Playground<\/a>\u4e0b\u8f7d\u5e93\uff0c\u6216\u8005\u53ea\u9700\u5355\u51fb\u6b64\u6309\u94ae\u5373\u53ef\u4e0b\u8f7d zip\uff1aLcdBarGraph-1.5.zip<\/a><\/p>\n\n\n\n
\u5b89\u88c5\u5e93\u540e\uff0c\u8bf7\u5c1d\u8bd5\u4e0b\u9762\u7684\u8349\u56fe\u3002<\/p>\n\n\n\n
\/\/ includes the LiquidCrystal Library\n#include <LiquidCrystal.h> \n\n\/\/ includes the LcdBarGraph Library\n#include <LcdBarGraph.h>\n\n\/\/ Maximum distance we want to ping for (in centimeters).\n#define max_distance 200\n\n\/\/ Creates an LCD object. Parameters: (rs, enable, d4, d5, d6, d7)\nLiquidCrystal lcd(12, 11, 5, 4, 3, 2); \n\nLcdBarGraph lbg(&lcd, 16, 0, 1); \/\/ Creates an LCD Bargraph object.\n\nconst int trigPin = 9;\nconst int echoPin = 10;\nlong duration;\nint distance;\n\nvoid setup() \n{\n\tlcd.begin(16,2); \/\/ Initializes the interface to the LCD screen\n\t\n\tpinMode(trigPin, OUTPUT);\n\tpinMode(echoPin, INPUT);\n}\n\nvoid loop() \n{\n\t\/\/ Write a pulse to the HC-SR04 Trigger Pin\n\tdigitalWrite(trigPin, LOW);\n\tdelayMicroseconds(2);\n\tdigitalWrite(trigPin, HIGH);\n\tdelayMicroseconds(10);\n\tdigitalWrite(trigPin, LOW);\n\t\n\t\/\/ Measure the response from the HC-SR04 Echo Pin\n\tduration = pulseIn(echoPin, HIGH);\n\t\n\t\/\/ Determine distance from duration\n\t\/\/ Use 343 metres per second as speed of sound\n\tdistance= duration*0.034\/2;\n\t\n\t\/\/ Prints \"Distance: <value>\" on the first line of the LCD\n\tlcd.setCursor(0,0);\n\tlcd.print(\"Distance: \"); \n\tlcd.print(distance);\n\tlcd.print(\" cm\");\n\n\t\/\/ Draws bargraph on the second line of the LCD\n\tlcd.setCursor(0,1);\n\tlbg.drawValue(distance, max_distance);\n\tdelay(500);\n}<\/pre>\n\n\n\n
\u8fd9\u5c31\u662f\u8f93\u51fa\u7684\u6837\u5b50\u3002<\/p>\n\n\n\n
\"HC-SR04
16\u00d72 \u5b57\u7b26 LCD \u4e0a\u7684\u6761\u5f62\u56fe\u8f93\u51fa<\/figcaption><\/figure>\n\n\n\n
\u4ee3\u7801\u8bf4\u660e\uff1a<\/h3>\n\n\n\n
\u9996\u5148\uff0c\u60a8\u9700\u8981\u50cf\u5f80\u5e38\u4e00\u6837\u8bbe\u7f6e LiquidCrystal \u5e93\u3002\u5728\u6b64\u4e4b\u540e\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u521a\u521a\u521b\u5efa\u7684 LiquidCrystal \u5b9e\u4f8b\u521b\u5efa LcdBarGraph \u5b9e\u4f8b\u3002\u60a8\u5e94\u8be5\u5c06 LiquidCrystal \u7684\u5f15\u7528\u4f20\u9012\u7ed9 LcdBarGraph \u7684\u6784\u9020\u51fd\u6570\u3002<\/p>\n\n\n\n
LcdBarGraph \u7684\u6784\u9020\u51fd\u6570\u9700\u8981\u53e6\u5916\u4e09\u4e2a\u53c2\u6570\u3002\u7b2c\u4e8c\u4e2a\u662f LCD \u4e2d\u7684\u5b57\u7b26\u5217\u6570\uff08\u5728\u6211\u4eec\u7684\u4f8b\u5b50\u4e2d\u662f 16\uff09\u3002\u6700\u540e\u4e24\u4e2a\u53c2\u6570\u662f\u53ef\u9009\u7684\uff0c\u5141\u8bb8\u81ea\u5b9a\u4e49\u6761\u5f62\u5b9a\u4f4d\u3002<\/p>\n\n\n\n
\/\/ creating bargraph instance\nLcdBarGraph lbg(&lcd, 16, 0, 1);<\/pre>\n\n\n\n
\u73b0\u5728\u4e00\u65e6\u6211\u4eec\u8ba1\u7b97\u51fa\u4e0e\u4f20\u611f\u5668\u7684\u8ddd\u79bb\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u4f7f\u7528drawValue(value, maxValue)<\/strong>\u51fd\u6570\u6765\u663e\u793a\u6761\u5f62\u56fe\u3002\u8fd9\u5c06\u7ed8\u5236\u4e00\u4e2a\u503c\u5728 0 \u548c maxValue \u4e4b\u95f4\u7684\u6761\u5f62\u56fe\u3002<\/p>\n\n\n\n
\/\/display bargraph\nlbg.drawValue(distance, max_distance);<\/pre>\n\n\n\n
HC-SR04 \u4e0e 3 \u7ebf\u6a21\u5f0f\u7684\u63a5\u53e3<\/h2>\n\n\n\n
3 \u7ebf\u6a21\u5f0f\u662f\u60a8\u53ea\u9700\u8981\u4e00\u4e2a\u8fde\u63a5\u5230\u5355\u4e2a Arduino \u6570\u5b57 I\/O \u5f15\u811a\u800c\u4e0d\u662f\u4e24\u4e2a\u7684\u8fde\u63a5\u3002\u5982\u679c\u60a8\u4e0d\u77e5\u9053\uff0c\u6709\u8bb8\u591a\u8d85\u58f0\u6ce2\u4f20\u611f\u5668\u53ea\u80fd\u5728 3 \u7ebf\u6a21\u5f0f\u4e0b\u8fd0\u884c\uff0c\u4f8b\u5982\u4ee4\u4eba\u656c\u754f\u7684\u89c6\u5dee ping))) \u4f20\u611f\u5668<\/a>\u3002<\/p>\n\n\n\n
\u5728 3 \u7ebf\u6a21\u5f0f\u4e0b\uff0c\u5355\u4e2a I\/O \u5f15\u811a\u7528\u4f5c\u8f93\u5165\u548c\u8f93\u51fa\u3002\u8fd9\u662f\u53ef\u80fd\u7684\uff0c\u56e0\u4e3a\u4ece\u6765\u6ca1\u6709\u540c\u65f6\u4f7f\u7528\u8f93\u5165\u548c\u8f93\u51fa\u7684\u65f6\u95f4\u3002\u901a\u8fc7\u6d88\u9664\u4e00\u4e2a I\/O \u5f15\u811a\u8981\u6c42\uff0c\u6211\u4eec\u53ef\u4ee5\u4fdd\u5b58\u4e0e Arduino \u7684\u8fde\u63a5\u5e76\u5c06\u5176\u7528\u4e8e\u5176\u4ed6\u7528\u9014\u3002\u5f53\u4f7f\u7528\u50cf ATtiny85 \u8fd9\u6837\u7684 I\/O \u5f15\u811a\u6570\u91cf\u6709\u9650\u7684\u82af\u7247\u65f6\uff0c\u5b83\u4e5f\u5f88\u6709\u7528\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u662f\u4f7f\u7528 3 \u7ebf\u6a21\u5f0f\u5c06 HC-SR04 \u4f20\u611f\u5668\u8fde\u63a5\u5230 Arduino \u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n
\"Arduino
\u5c06 HC-SR04 \u8d85\u58f0\u6ce2\u4f20\u611f\u5668\u8fde\u63a5\u5230 Arduino UNO \u2013 3 \u7ebf\u6a21\u5f0f<\/figcaption><\/figure>\n\n\n\n
\u5982\u60a8\u6240\u89c1\uff0c\u60a8\u9700\u8981\u505a\u7684\u5c31\u662f\u5c06\u89e6\u53d1\u5668\u548c\u56de\u58f0\u8fde\u63a5\u5230 Arduino \u5f15\u811a 9\u3002\u8bf7\u6ce8\u610f\uff0c\u60a8\u9700\u8981\u5728\u8349\u56fe\u4e2d\u505a\u7684\u552f\u4e00\u533a\u522b\u662f\u4e3a\u89e6\u53d1\u5668\u548c\u56de\u58f0\u5f15\u811a\u503c\u5b9a\u4e49\u5f15\u811a 9\u3002\u8349\u56fe\u7684\u5176\u4f59\u90e8\u5206\u662f\u76f8\u540c\u7684\u3002<\/p>\n\n\n\n
#define TRIGGER_PIN 9 \/\/ Trigger and Echo both on pin 9\n#define ECHO_PIN 9<\/pre>\n\n\n\n
\u6709\u54ea\u4e9b\u9650\u5236\uff1f<\/h2>\n\n\n\n
\u5c31\u7cbe\u5ea6\u548c\u6574\u4f53\u5b9e\u7528\u6027\u800c\u8a00\uff0cHC-SR04\u8d85\u58f0\u6ce2\u8ddd\u79bb\u4f20\u611f\u5668\u786e\u5b9e\u5f88\u68d2\uff0c\u5c24\u5176\u662f\u4e0e\u5176\u4ed6\u4f4e\u6210\u672c\u8ddd\u79bb\u68c0\u6d4b\u4f20\u611f\u5668\u76f8\u6bd4\u3002\u8fd9\u5e76\u4e0d\u610f\u5473\u7740 HC-SR04 \u4f20\u611f\u5668\u80fd\u591f\u6d4b\u91cf\u201c\u4e00\u5207\u201d\u3002\u4e0b\u56fe\u663e\u793a\u4e86 HC-SR04 \u65e0\u6cd5\u6d4b\u91cf\u7684\u51e0\u79cd\u60c5\u51b5\uff1a<\/p>\n\n\n\n
a) \u4f20\u611f\u5668\u4e0e\u7269\u4f53\/\u969c\u788d\u7269\u4e4b\u95f4\u7684\u8ddd\u79bb\u8d85\u8fc7 13 \u82f1\u5c3a\u3002<\/p>\n\n\n\n
\"HC-SR04<\/figure><\/div>\n\n\n\n
b) \u7269\u4f53\u7684\u53cd\u5c04\u9762\u5448\u5c0f\u89d2\u5ea6\uff0c\u56e0\u6b64\u58f0\u97f3\u4e0d\u4f1a\u53cd\u5c04\u56de\u4f20\u611f\u5668\u3002<\/p>\n\n\n\n
\"HC-SR04<\/figure><\/div>\n\n\n\n
c) \u7269\u4f53\u592a\u5c0f\uff0c\u65e0\u6cd5\u5c06\u8db3\u591f\u7684\u58f0\u97f3\u53cd\u5c04\u56de\u4f20\u611f\u5668\u3002\u6b64\u5916\uff0c\u5982\u679c\u60a8\u7684 HC-SR04 \u4f20\u611f\u5668\u5b89\u88c5\u5728\u8bbe\u5907\u7684\u8f83\u4f4e\u4f4d\u7f6e\uff0c\u60a8\u53ef\u80fd\u4f1a\u68c0\u6d4b\u5230\u4ece\u5730\u677f\u53cd\u5c04\u7684\u58f0\u97f3\u3002<\/p>\n\n\n\n
\"HC-SR04<\/figure><\/div>\n\n\n\n
d) \u5728\u5bf9\u4f20\u611f\u5668\u8fdb\u884c\u8bd5\u9a8c\u65f6\uff0c\u6211\u4eec\u53d1\u73b0\u4e00\u4e9b\u8868\u9762\u67d4\u8f6f\u3001\u4e0d\u89c4\u5219\u7684\u7269\u4f53\uff08\u4f8b\u5982\u6bdb\u7ed2\u73a9\u5177\uff09\u4f1a\u5438\u6536\u800c\u4e0d\u662f\u53cd\u5c04\u58f0\u97f3\uff0c\u56e0\u6b64 HC-SR04 \u4f20\u611f\u5668\u53ef\u80fd\u96be\u4ee5\u68c0\u6d4b\u5230\u3002<\/p>\n\n\n\n
\"HC-SR04<\/figure><\/div>\n\n\n\n
\u6e29\u5ea6\u5bf9\u8ddd\u79bb\u6d4b\u91cf\u7684\u5f71\u54cd<\/h2>\n\n\n\n
\u5c3d\u7ba1 HC-SR04 \u5bf9\u4e8e\u6211\u4eec\u7684\u5927\u591a\u6570\u9879\u76ee\uff08\u4f8b\u5982\u5165\u4fb5\u8005\u68c0\u6d4b\u6216\u63a5\u8fd1\u8b66\u62a5\uff09\u6765\u8bf4\u76f8\u5f53\u51c6\u786e\uff1b\u4f46\u6709\u65f6\u60a8\u53ef\u80fd\u60f3\u8981\u8bbe\u8ba1\u4e00\u79cd\u5728\u6237\u5916\u6216\u5f02\u5e38\u708e\u70ed\u6216\u5bd2\u51b7\u73af\u5883\u4e2d\u4f7f\u7528\u7684\u8bbe\u5907\u3002\u5982\u679c\u662f\u8fd9\u79cd\u60c5\u51b5\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u8003\u8651\u8fd9\u6837\u4e00\u4e2a\u4e8b\u5b9e\uff0c\u5373\u7a7a\u6c14\u4e2d\u7684\u58f0\u901f\u968f\u6e29\u5ea6\u3001\u6c14\u538b\u548c\u6e7f\u5ea6\u800c\u53d8\u5316\u3002<\/p>\n\n\n\n
\u7531\u4e8e\u58f0\u901f\u4f1a\u5f71\u54cd\u6211\u4eec\u7684 HC-SR04 \u8ddd\u79bb\u8ba1\u7b97\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5f71\u54cd\u6211\u4eec\u7684\u8bfb\u6570\u3002\u5982\u679c\u6e29\u5ea6 (\u00b0C) \u548c\u6e7f\u5ea6\u5df2\u77e5\uff0c\u8bf7\u8003\u8651\u4ee5\u4e0b\u516c\u5f0f\uff1a<\/p>\n\n\n\n
\u58f0\u901f m\/s = 331.4 + (0.606 * Temp) + (0.0124 * Humidity)<\/p>\n","protected":false},"excerpt":{"rendered":"
HC-SR04 \u8d85\u58f0\u6ce2\u4f20\u611f\u5668\u5982\u4f55\u5de5\u4f5c\u5e76\u4e0e Arduino \u8fde\u63a5 \u4f7f\u7528 HC-SR04 \u8d85\u58f0\u6ce2\u8ddd\u79bb\u4f20\u611f\u5668\u4e3a\u60a8\u7684\u4e0b … \u7ee7\u7eed\u9605\u8bfb\u201c\u8d85\u58f0\u6ce2\u4f20\u611f\u5668\u201d<\/span><\/a><\/p>\n","protected":false},"author":28,"featured_media":0,"parent":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"doc_category":[34],"doc_tag":[],"class_list":["post-1493","docs","type-docs","status-publish","hentry","doc_category-coding"],"_links":{"self":[{"href":"http:\/\/mgspace.wiki\/docs\/index.php?rest_route=\/wp\/v2\/docs\/1493","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/mgspace.wiki\/docs\/index.php?rest_route=\/wp\/v2\/docs"}],"about":[{"href":"http:\/\/mgspace.wiki\/docs\/index.php?rest_route=\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"http:\/\/mgspace.wiki\/docs\/index.php?rest_route=\/wp\/v2\/users\/28"}],"replies":[{"embeddable":true,"href":"http:\/\/mgspace.wiki\/docs\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1493"}],"version-history":[{"count":4,"href":"http:\/\/mgspace.wiki\/docs\/index.php?rest_route=\/wp\/v2\/docs\/1493\/revisions"}],"predecessor-version":[{"id":2175,"href":"http:\/\/mgspace.wiki\/docs\/index.php?rest_route=\/wp\/v2\/docs\/1493\/revisions\/2175"}],"wp:attachment":[{"href":"http:\/\/mgspace.wiki\/docs\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1493"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"http:\/\/mgspace.wiki\/docs\/index.php?rest_route=%2Fwp%2Fv2%2Fdoc_category&post=1493"},{"taxonomy":"doc_tag","embeddable":true,"href":"http:\/\/mgspace.wiki\/docs\/index.php?rest_route=%2Fwp%2Fv2%2Fdoc_tag&post=1493"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}