{"id":471,"date":"2018-09-03T22:25:50","date_gmt":"2018-09-03T13:25:50","guid":{"rendered":"https:\/\/windabaft.co.jp\/blog_ceo\/?p=471"},"modified":"2018-09-09T15:08:51","modified_gmt":"2018-09-09T06:08:51","slug":"%e3%82%a2%e3%83%ab%e3%82%b3%e3%83%bc%e3%83%ab%e3%82%bb%e3%83%b3%e3%82%b5%e3%83%bc-mq-3-%e3%81%a8-arduino%e3%81%a7%e8%a1%80%e4%b8%ad%e3%82%a2%e3%83%ab%e3%82%b3%e3%83%bc%e3%83%ab%e6%bf%83%e5%ba%a6bac","status":"publish","type":"post","link":"https:\/\/windabaft.co.jp\/blog_ceo\/?p=471","title":{"rendered":"\u30a2\u30eb\u30b3\u30fc\u30eb\u30bb\u30f3\u30b5\u30fc MQ-3 \u3068 Arduino\u3067\u547c\u6c17\u4e2d\u3068\u8840\u4e2d\u30a2\u30eb\u30b3\u30fc\u30eb\u6fc3\u5ea6(BAC)\u6e2c\u5b9a \u30b9\u30b1\u30c3\u30c1\u30b3\u30fc\u30c9\u4ed8"},"content":{"rendered":"

\u30a2\u30eb\u30b3\u30fc\u30eb\u30bb\u30f3\u30b5\u30fc MQ-3 \u3068 Arduino\u3067\u547c\u6c17\u4e2d\u3068\u8840\u4e2d\u306e\u30a2\u30eb\u30b3\u30fc\u30eb\u6fc3\u5ea6(BAC\uff1ablood alcohol concentration\uff09\u6e2c\u5b9a\u3092\u3057\u3066\u307f\u305f\u3002<\/p>\n

\u3068\u3044\u3063\u3066\u3082Datasheet\u306e[Rs\/R0]\/[mg\/L]\u4e21\u5bfe\u6570\u30b0\u30e9\u30d5\u304b\u3089\u8fd1\u4f3c\u5f0f\u3092\u624b\u8a08\u7b97\u3067\u7b97\u51fa\u3057\u3066
\n\u5909\u63db\u3057\u305f\u3060\u3051\u306a\u306e\u3067\u3001\u5b9f\u969b\u306e\u5024\u3068\u3069\u308c\u304f\u3089\u3044\u8fd1\u3044\u306e\u304b\u306f\u4e0d\u660e\u3002
\n\u53c2\u8003\u3057\u305fURL\u306e\u30da\u30fc\u30b8\u3067\u306f\u3001\u56de\u5e30\u5206\u6790\u3057\u3066\u3044\u308b\u3093\u3067\u3059\u304c\u3001\u3044\u307e\u3044\u3061\u306a\u7d50\u679c\u3060\u3063\u305f\u306e\u3067\u3001
\n\u4eca\u56de\u306e\u624b\u8a08\u7b97\u3067\u6c42\u3081\u305f\u8fd1\u4f3c\u5f0f\u306b\u3057\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n

\u306a\u306e\u3067\u3001\u5fc5\u305a\u3001\u3054\u81ea\u5206\u3067\u78ba\u8a8d\u3092\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n

\u30c0\u30a4\u30bd\u30fc\u3067\u8cb7\u3063\u3066\u304d\u305f\u30a2\u30eb\u30b3\u30fc\u30eb\u30a6\u30a7\u30c8\u30c6\u30c3\u30b7\u30e5\u8fd1\u3065\u3051\u308b\u3068
\n\u5024\u3092\u51fa\u3057\u307e\u3057\u305f\u304c\u3001\u8fd1\u3044\u304b\u3069\u3046\u304b\u8ab0\u304b\u691c\u8a3c\u3057\u305f\u3089\u6559\u3048\u3066\u306d\u3002<\/p>\n

\u4f7f\u7528\u3057\u305f\u30e2\u30b8\u30e5\u30fc\u30eb\u306f\u3053\u3061\u3089\u306eMQ-3\u30e2\u30b8\u30e5\u30fc\u30eb<\/a><\/p>\n

\u307e\u305a\u3001\u30ad\u30e3\u30ea\u30d6\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u305f\u3081\u306bR0\u5024\u3092\u6e2c\u5b9a\u3059\u308b
\n\u30b9\u30b1\u30c3\u30c1\u306f\u4e0b\u8a18\u3002\u3053\u3053\u3067\u8a08\u7b97\u3055\u308c\u308bR0\u5024\u306f\u30e1\u30e2\u3063\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n

\/\/ \u30ad\u30e3\u30ea\u30d6\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u305f\u3081\u306bR0\u3092\u8a08\u6e2c\u3059\u308b\r\n\/\/ MQ-3 Pin1 VCC \u2192 Arduino 5V\r\n\/\/ MQ-3 Pin2 GND \u2192 Arduino GND \r\n\/\/ MQ-3 Pin3 DOUT\uff1a\u30a2\u30eb\u30b3\u30fc\u30eb\u691c\u51fa\u3067HIGH\u51fa\u529b\u3059\u308b  \u2192 \u4eca\u56de\u306f\u4e0d\u4f7f\u7528\r\n\/\/ MQ-3 Pin4 AOUT\uff1a\u30a2\u30eb\u30b3\u30fc\u30eb\u30ec\u30d9\u30eb\u306e\u30a2\u30ca\u30ed\u30b0\u51fa\u529b \u2192 Arduino A0\r\n\/\/ Wind Abaft Co., Ltd.\r\n\r\nvoid setup()\r\n{\r\n   Serial.begin(9600);\r\n}\r\n\r\nvoid loop()\r\n{\r\n    float sensor_volt;\r\n    float RS; \/\/\u00a0\u7a7a\u6c17\u4e2d\u306eRS\u5024\r\n    float R0; \/\/ \u30a2\u30eb\u30b3\u30fc\u30eb\u4e2d\u306eR0\u5024\r\n    float sensorValue;\r\n\r\n    for(int i = 0 ; i < 100 ; i++)\r\n    {\r\n        sensorValue = sensorValue + analogRead(A0);\r\n    }\r\n\r\n    sensorValue = sensorValue\/100.0;     \/\/\u5e73\u5747\u5024\u306e\u7b97\u51fa\r\n    sensor_volt = (sensorValue\/1024)*5.0;  \/\/Arduino\u306ePWM\u306f10\u30d3\u30c3\u30c81024\r\n    RS = (5.0-sensor_volt)\/sensor_volt; \/\/ \u7701\u7565 RL\r\n    R0 = RS\/60.0; \/\/ \u304d\u308c\u3044\u306a\u7a7a\u6c17\u4e2d\u306eRS\/R0=60\r\n    Serial.print(\"R0 = \");\r\n    Serial.println(R0);\r\n    delay(1000);\r\n\r\n}<\/pre>\n
\u307e\u305a\u547c\u6c17\u4e2d\u306e\u30a2\u30eb\u30b3\u30fc\u30eb\u6fc3\u5ea6\u3092\u6c42\u3081\u308b\u306e\u306b\u3001\u4e0b\u8a18\u30b0\u30e9\u30d5\u304b\u3089\u624b\u8a08\u7b97\u3067\u4e0b\u8a18\u306e\u8fd1\u4f3c\u5f0f\u3092\u4f5c\u3063\u305f\u3002
\n\u691c\u7b97\u3057\u3066\u3044\u306a\u3044\u306e\u3067\u9593\u9055\u3063\u3066\u3044\u308b\u304b\u3082\u3002<\/p>\n
BAC\uff08\u547c\u6c17\u4e2d\u306e\u30a2\u30eb\u30b3\u30fc\u30eb\u6fc3\u5ea6[mg\/L]\uff09 = pow(10,-1*(((log10(ratio))+0.2391)\/0.6008))<\/p>\n
\"MQ-3<\/a>
MQ-3 \u30a2\u30eb\u30b3\u30fc\u30eb\u6fc3\u5ea6\u4e21\u5bfe\u6570\u30b0\u30e9\u30d5<\/figcaption><\/figure>\n
\u3053\u306e\u5f0f\u3068\u5148\u307b\u3069\u6c42\u3081\u305fR0\u5024\u3092\u3082\u3068\u306b\u547c\u6c17\u4e2d\u30a2\u30eb\u30b3\u30fc\u30eb\u6fc3\u5ea6\u7b97\u51fa\u3059\u308b\u3002
\n\u4e00\u822c\u7684\u306b,\u547c\u6c17\u4e2d\u30a2\u30eb\u30b3\u30fc\u30eb\u6fc3\u5ea6[mg\/L] : BAC[mg\/ml] = 1:2<\/strong><\/span>
\n\u3068\u306e\u3053\u3068\u306a\u306e\u3067\u3001\u305d\u308c\u3092\u5143\u306b\uff12\u500d\u3057\u3066BAC[mg\/ml]\u51fa\u3057\u305f\u3002<\/p>\n
\u5148\u307b\u3069\u306e\u6e2c\u5b9a\u3067\u5f97\u305f
\nR0\u5024
\n\u3092\u3001\u4e0b\u8a18\u306b\u4ee3\u5165\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044<\/p>\n
\/\/ \u30ad\u30e3\u30ea\u30d6\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u305f\u3081\u306b\u6e2c\u5b9a\u3057\u305fR0\u306e\u5024\u3092\u5229\u7528\u3059\u308b\r\n\/\/ MQ-3 Pin1 VCC \u2192 Arduino 5V\r\n\/\/ MQ-3 Pin2 GND \u2192 Arduino GND \r\n\/\/ MQ-3 Pin3 DOUT\uff1a\u30a2\u30eb\u30b3\u30fc\u30eb\u691c\u51fa\u3067HIGH\u51fa\u529b\u3059\u308b  \u2192 \u4eca\u56de\u306f\u4e0d\u4f7f\u7528\r\n\/\/ MQ-3 Pin4 AOUT\uff1a\u30a2\u30eb\u30b3\u30fc\u30eb\u30ec\u30d9\u30eb\u306e\u30a2\u30ca\u30ed\u30b0\u51fa\u529b \u2192 Arduino A0\r\n\/\/ Wind Abaft Co., Ltd. Fumiyoshi.Yotsugi\r\n\r\n#include <math.h>\r\nvoid setup() \r\n{\r\n    Serial.begin(9600);\r\n}\r\n\r\nvoid loop() \r\n{\r\n    float sensor_volt;\r\n    float RS_gas; \/\/ \u6e2c\u5b9a\u5bfe\u8c61\u306e\u30ac\u30b9\u4e2d\u306eRS\u5024\r\n    double ratio; \/\/ RS_gas\/RS_air \u7a7a\u6c17\u4e2d\u306eRS\u5272\u5408\r\n    double BAC;\r\n    int sensorValue = analogRead(A0);\r\n    sensor_volt=(float)sensorValue\/1024*5.0;\r\n    RS_gas = (5.0-sensor_volt)\/sensor_volt; \/\/ \u7701\u7565 *RL\r\n\r\n   \/*- \"R0\" \u3092\u5148\u307b\u3069\u8a08\u6e2c\u3057\u305f\u5024\u306b\u7f6e\u304d\u63db\u3048\u3066\u304f\u3060\u3055\u3044 -*\/\r\n    ratio = RS_gas\/R0;  \/\/ ratio = RS\/R0   \r\n    BAC = pow(10,-1*(((log10(ratio))+0.2391)\/0.6008));  \/\/ mg\/L\u4e2d\u306eBAC\r\n    Serial.print(\"\u547c\u6c17\u4e2dBAC[mg\/L] = \");\r\n    Serial.println(BAC); \/\/ \u547c\u6c17\u4e2d\u306e\u30a2\u30eb\u30b3\u30fc\u30eb\u6fc3\u5ea6[mg\/L]\r\n    Serial.print(\"\\n\");\r\n    Serial.print(\"\u8840\u4e2dBAC[mg\/ml] = \");\r\n    Serial.println(BAC*2);  \/\/ \u8840\u6db2\u5185\u306e\u30a2\u30eb\u30b3\u30fc\u30eb\u6fc3\u5ea6[mg\/ml]\u306b\u5909\u63db(1:2)\r\n    Serial.print(\"\\n\\n\");\r\n    delay(1000);\r\n}<\/pre>\n
\u3061\u306a\u307f\u306b\u672c\u30e2\u30b8\u30e5\u30fc\u30eb\u306f\u30a2\u30eb\u30b3\u30fc\u30eb\u306b\u53cd\u5fdc\u3057\u3066\uff08\u30a2\u30eb\u30b3\u30fc\u30eb\u6fc3\u5ea6\u304c\u95be\u5024\u3092\u3053\u3059\u3068\uff09\u3001
\nD3 Pin (D Out)\u304chigh\u3092\u51fa\u529b\u3057\u3066\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u88cf\u9762\u306e\u30c1\u30c3\u30d7LED\u304c\u70b9\u706f\u3057\u307e\u3059\u3002<\/p>\n
\u4e0a\u8a18\u306e\u79c1\u306e\u5f0f\u3060\u30680.01[mg\/L]\u3067\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u88cf\u9762\u306e\u30c1\u30c3\u30d7LED\u304c\u70b9\u706f\u3057\u3066\u3057\u307e\u3046\u306e\u3067
\n\u654f\u611f\u3059\u304e\u308b\u304b\u306a\u30fc\u3068\u3044\u3046\u611f\u3058\u3067\u3059\u306d\u3002
\n\u3088\u308a\u66f4\u6b63\u3057\u3066\u3044\u304f\u5fc5\u8981\u304c\u3042\u308a\u305d\u3046\u3067\u3059\u3002<\/p>\n
\u53c2\u8003\uff1ahttps:\/\/www.teachmemicro.com\/mq-3-alcohol-sensor\/<\/a>
\n\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\uff1ahttps:\/\/www.sparkfun.com\/datasheets\/Sensors\/MQ-3.pdf<\/a><\/p>\n
\u30a2\u30eb\u30b3\u30fc\u30eb\u6fc3\u5ea6\u306e\u904b\u8ee2\u6280\u80fd\u3078\u4e0e\u3048\u308b\u5f71\u97ff\u306f\u4e0b\u8a18\u3060\u305d\u3046\u3067\u3059\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
\u60aa\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u904b\u8ee2\u6280\u80fd<\/th>\n\u8840\u4e2d\u30a2\u30eb\u30b3\u30fc\u30eb\u6fc3\u5ea6
\n(mg\/mL)<\/th>\n		\u547c\u6c17\u4e2d\u30a2\u30eb\u30b3\u30fc\u30eb\u6fc3\u5ea6
\n(mg\/L)<\/th>\n<\/tr>\n<\/thead>\n
\u6ce8\u610f\u306e\u96c6\u4e2d<\/td>\n0.05<\/td>\n\uff3b0.025\uff3d<\/td>\n<\/tr>\n
\u53cd\u5fdc\u6642\u9593<\/td>\n0.2<\/td>\n\uff3b0.1\uff3d<\/td>\n<\/tr>\n
\u8ffd\u8de1\u6280\u80fd<\/td>\n0.2<\/td>\n\uff3b0.1\uff3d<\/td>\n<\/tr>\n
\u591a\u65b9\u9762\u3078\u306e\u6ce8\u610f<\/td>\n0.2<\/td>\n\uff3b0.1\uff3d<\/td>\n<\/tr>\n
\u30cf\u30f3\u30c9\u30eb\u64cd\u4f5c<\/td>\n0.3<\/td>\n\uff3b0.15\uff3d<\/td>\n<\/tr>\n
\u8996\u899a\u6a5f\u80fd\uff08\u8996\u7dda\u306e\u56fa\u5b9a\u304c\u56f0\u96e3\uff09<\/td>\n0.4<\/td>\n\uff3b0.2\uff3d<\/td>\n<\/tr>\n
\u898f\u5247\u9075\u5b88<\/td>\n0.5<\/td>\n\uff3b0.25\uff3d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u51fa\u5178\u5143\uff1ahttps:\/\/www.asahibeer.co.jp\/csr\/tekisei\/drink_drive\/effect.html<\/a><\/p>\n
\u3061\u306a\u307f\u306b\u6cd5\u5b9a\u306e\u9152\u6c17\u5e2f\u3073\u57fa\u6e96\u306f\u4e0b\u8a18\uff08\u53c2\u7167\uff1a\u8b66\u5bdf\u5e81<\/a>\uff09
\n\u547c\u6c17\u4e2d\u30a2\u30eb\u30b3\u30fc\u30eb\u6fc3\u5ea60.15[mg\/L]\u4ee5\u4e0a\u304b\u3089\u30a2\u30a6\u30c8<\/span><\/strong>\u3060\u305d\u3046\u3067\u3059\u3002<\/p>\n
\u9152\u9154\u3044\u904b\u8ee2<\/h4>\n
(\u300c\u9152\u9154\u3044\u300d\u3068\u306f\u3001\u300c\u30a2\u30eb\u30b3\u30fc\u30eb\u306e\u5f71\u97ff\u306b\u3088\u308a\u8eca\u4e21\u7b49\u306e\u6b63\u5e38\u306a\u904b\u8ee2\u304c\u3067\u304d\u306a\u3044\u72b6\u614b\u300d\u3092\u3044\u3046\u3002)<\/p>\n