{"id":953,"date":"2018-05-12T22:10:46","date_gmt":"2018-05-12T14:10:46","guid":{"rendered":"https:\/\/usr.nkust.org\/?p=953"},"modified":"2018-05-12T22:10:46","modified_gmt":"2018-05-12T14:10:46","slug":"sonar","status":"publish","type":"post","link":"https:\/\/104.es\/index.php\/2018\/05\/12\/sonar\/","title":{"rendered":"\u8d85\u97f3\u6ce2\u611f\u6e2c\u539f\u7406"},"content":{"rendered":"

\u00a0 \u00a0 \u9019\u6b21\u5be6\u7fd2\u4f7f\u7528\u7684\u662fHC-SR04 \u8d85\u97f3\u6ce2\u6e2c\u8ddd\u6a21\u7d44\u3002\u63d0\u4f9b2cm\u81f3400cm\u7684\u975e\u63a5\u89f8\u5f0f\u6e2c\u91cf\u529f\u80fd\uff0c\u6e2c\u8ddd\u7cbe\u5ea6\u53ef\u90543mm\u3002\u6bcf\u500b HC-SR04 \u6a21\u584a\u5305\u62ec\u4e00\u500b\u8d85\u8072\u6ce2\u767c\u5c04\u5668\uff0c\u4e00\u500b\u63a5\u6536\u5668\u548c\u4e00\u500b\u63a7\u5236\u96fb\u8def\u3002\u5728HC-SR04\u4e0a\u53ea\u9700\u8981\u56db\u500b\u5f15\u8173\uff1aVCC\uff08\u96fb\u6e90\uff09\uff0cTrig\uff08\u89f8\u767c\u5668\uff09\uff0cEcho\uff08\u63a5\u6536\uff09\u548cGND\uff08\u5730\uff09\u3002<\/span><\/p>\n

\u6240\u9700\u6750\u6599<\/span><\/strong><\/p>\n

Micro:bit \u4e3b\u677f*1\u3001Micro:bit Breakout*1\u3001\u8d85\u97f3\u6ce2\u6a21\u7d44(HC-SR04)<\/span><\/p>\n

\u539f\u7406<\/span><\/strong><\/p>\n

\u7d66Trig\u8173\u4e00\u500b\u81f3\u5c1110us\u7684\u9ad8\u96fb\u4f4d\u4fe1\u865f\uff0cHC-SR04\u6703\u767c\u90018\u500b40KHz\u7684\u65b9\u6ce2\uff0c\u4e26\u81ea\u52d5\u5075\u6e2c\u662f\u5426\u6709\u8fd4\u56de\u4fe1\u865f\uff0c\u82e5\u6709\u4fe1\u865f\u8fd4\u56de\uff0c\u5247\u900f\u904eEcho\u8173\u4f4d\u9001\u51fa\u4e00\u500b\u9ad8\u96fb\u4f4d\u7684\u8a0a\u865f\uff0c\u9ad8\u96fb\u4f4d\u6301\u7e8c\u7684\u6642\u9593\u5c31\u662f\u8d85\u97f3\u6ce2\u5f9e\u767c\u5c04\u5230\u8fd4\u56de\u7684\u6642\u9593\u3002<\/span><\/p>\n

\u7531\u6b64\u8cc7\u8a0a\u5c31\u53ef\u4ee5\u8a08\u7b97\u51fa\u8ddd\u96e2: \u6e2c\u8a66\u8ddd\u96e2 = { \u9ad8\u96fb\u4f4d x \u8072\u901f(340m\/s) } \/ 2<\/strong><\/span><\/p>\n

\u63a5\u7dda\u8207\u5be6\u4f5c<\/span><\/strong><\/p>\n

\u8981\u63a7\u5236HC-SR04\u6a21\u7d44\u8981\u900f\u904e2\u500b\u6578\u4f4d\u8173\uff0c1\u96bb\u63a5\u6536\u8a0a\u865f\u3001 1\u96bb\u767c\u9001\u8a0a\u865f\u3002<\/span><\/p>\n

\u8981\u9a45\u52d5HC-SR04\u5fc5\u9808\u89815V\u96fb\u58d3\uff0c\u4f46\u5728micro:bit\u8f38\u51fa\u8173\u4f4d\u4e2d\u53ea\u6709\u63d0\u4f9b3.3V\uff0c\u7d93\u904e\u6e2c\u8a66\u5f8c\u7121\u6cd5\u9806\u5229\u9a45\u52d5HC-SR04\u3002micro:bit\u63d0\u4f9b\u76845V\u5728\u6b63\u9762\u7684\u63a5\u9ede\u4e0a\u4e26\u6c92\u6709\u8173\u4f4d(\u5982\u4e0b\u5716)\uff0c\u56e0\u6b64\u5fc5\u9808\u81ea\u884c\u710a\u63a5\u8173\u4f4d\u51fa\u4f86\u3002<\/span><\/p>\n

\"\"\"\"<\/p>\n

\u63a5\u7dda :<\/span><\/strong>\u00a0<\/span><\/p>\n

VCC\u63a5\u81f3\u6b63\u9762\u81ea\u884c\u710a\u51fa\u76845V\u63a5\u8173\u3001<\/span>TRIG\u63a5\u81f3P1\u3001ECHO\u63a5\u81f3P0\u3002<\/span><\/p>\n

\"\"<\/p>\n

 <\/p>\n

\u7a0b\u5f0f\u8a2d\u8a08<\/span><\/strong><\/p>\n

HC-SR04\u9700\u89812\u500b\u6578\u4f4d\u8173\u4f4d\uff0c\u5206\u5225\u70ba\u63a5\u53d7\u8207\u767c\u9001\u8a0a\u865f\u4f7f\u7528\u9078\u7528P0\u8207P1\uff0c\u9700\u7279\u5225\u6ce8\u610f\u7684\u662f\uff0cHC-SR04\u662f\u900f\u904e\u8a08\u7b97\u56de\u50b3\u7684\u9ad8\u96fb\u4f4d\u6642\u9593\u4f86\u5f97\u77e5\u8ddd\u96e2\uff0cmicro:bit\u6709\u63d0\u4f9b\u984d\u5916\u7684\u5957\u4ef6\u4f86\u5b8c\u6210\u6b64\u52d5\u4f5c\u3002<\/span><\/p>\n

\u6dfb\u52a0\u5957\u4ef6:<\/span><\/strong><\/p>\n

\"\"\"\"<\/p>\n

\u4e0b\u8f09\u5b8c\u5957\u4ef6\u5f8c\u5c31\u53ef\u4ee5\u5728\u9078\u9805\u4e2d\uff0c\u770b\u5230\u7a0b\u5f0f\u65b9\u584a\u4e86\u3002<\/span><\/p>\n

\"\"<\/p>\n

\u7a0b\u5f0f:<\/strong><\/span><\/p>\n

sonar\u7a0b\u5f0f\u7a4d\u6728\u4e2d\uff0ctripc\u548cecho\u5206\u5225\u9078\u64c7\u8981\u4f7f\u7528\u7684\u63a5\u8173\u5373\u53ef\uff0cunit\u53ef\u4ee5\u9078\u64c7\u8ddd\u96e2\u55ae\u4f4d\u3002<\/span><\/p>\n

\"\"<\/p>\n

\u6bcf1\u79d2\u9418\u6703\u5c07\u8b80\u53d6\u5230\u7684\u8ddd\u96e2\u986f\u793a\u57285*5LED\u77e9\u9663\u4e0a\u3002<\/span><\/p>\n

\"\"<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

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