{"id":1821,"date":"2020-09-18T19:03:15","date_gmt":"2020-09-18T10:03:15","guid":{"rendered":"https:\/\/raspi-katsuyou.com\/?p=1821"},"modified":"2020-10-02T10:42:57","modified_gmt":"2020-10-02T01:42:57","slug":"%e8%b6%85%e9%9f%b3%e6%b3%a2%e3%82%bb%e3%83%b3%e3%82%b5hc-sr04%e3%82%92%e4%bd%bf%e3%81%a3%e3%81%a6%e8%b7%9d%e9%9b%a2%e3%82%92%e6%b8%ac%e5%ae%9a","status":"publish","type":"post","link":"https:\/\/raspi-katsuyou.com\/index.php\/2020\/09\/18\/19\/03\/15\/1821\/","title":{"rendered":"\u8d85\u97f3\u6ce2\u30bb\u30f3\u30b5(HC-SR04)\u3092\u4f7f\u3063\u3066\u8ddd\u96e2\u3092\u6e2c\u5b9a"},"content":{"rendered":"\n

\u8d85\u97f3\u6ce2\u5f0f\u306e\u6e2c\u8ddd\u30bb\u30f3\u30b5\u30fc\u300cHC-SR04\u300d\u3092\u4f7f\u3063\u3066\u3001\u5bfe\u8c61\u7269\u307e\u3067\u306e\u8ddd\u96e2\u3092\u6e2c\u5b9a\u3057\u305f\u306e\u3067\u7d39\u4ecb\u3057\u307e\u3059\u3002\u4eca\u56de\u4f7f\u7528\u3057\u305f\u300cHC-SR04\u300d\u306f\u3001\u79cb\u6708\u3055\u3093\u3067500\u5186\u7a0b\u5ea6\u3067\u8ca9\u58f2\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u8d85\u97f3\u6ce2\u30bb\u30f3\u30b5\u30fc\u3068\u805e\u304f\u3068\u9ad8\u305d\u3046\u3067\u3059\u3051\u3069\u3001\u610f\u5916\u306b\u5b89\u304f\u3067\u624b\u306b\u5165\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\"\"
\u8d85\u97f3\u6ce2\u5f0f\u306e\u6e2c\u8ddd\u30bb\u30f3\u30b5\u30fc\uff08HC-SR04)<\/figcaption><\/figure>\n\n\n\n

\u30e9\u30ba\u30d1\u30a4\u3068\u306e\u914d\u7dda\u63a5\u7d9a\u56f3\u306f\u4ee5\u4e0b\u3067\u3059\u3002\u4eca\u56de\u306f\u3001GPIO\u306e22\u30d4\u30f3\u306827\u30d4\u30f3\u3092\u4f7f\u7528\u3057\u307e\u3057\u305f\u3002\u6ce8\u610f\u70b9\u3068\u3057\u3066\u3001\u30bb\u30f3\u30b5(HC-SR04)\u306e\u96fb\u6e90\u304c5V\u3067\u3001\u30e9\u30ba\u30d1\u30a4\u306eGPIO\u304c3.3V\u306a\u306e\u3067\u3001\u30bb\u30f3\u30b5\u304b\u3089\u306e\u51fa\u529b\uff08Echo\u4fe1\u53f7\uff09\u3092\u5206\u5727\u3057\u3066\u3001\u96fb\u5727\u3092\u4e0b\u3052\u3066\u304b\u3089\u30e9\u30ba\u30d1\u30a4\u5074\u306b\u5165\u529b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\"\"
\u30e9\u30ba\u30d1\u30a4\u3068HC-SR04\u306e\u914d\u7dda\u63a5\u7d9a\u56f3<\/figcaption><\/figure>\n\n\n\n

\u30bb\u30f3\u30b5\u306e\u5236\u5fa1\u65b9\u6cd5\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u5206\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u3002<\/p>\n\n\n\n

  1. Trig\u7aef\u5b50\u309210us\u4ee5\u4e0aHigh\u306b\u3057\u307e\u3059\u3002<\/li>
  2. HC-SR04\u306f\u3001Trig\u7aef\u5b50\u304cLow\u306b\u306a\u3063\u3066\u304b\u3089\u300140kHZ\u306e\u30d1\u30eb\u30b9\u30928\u56de\u9001\u4fe1\u3057\u307e\u3059\u3002<\/li>
  3. HC-SR04\u306f\u3001\u5bfe\u8c61\u7269\u306b\u53cd\u5c04\u3057\u305f\u30d1\u30eb\u30b9\u3092\u53d7\u4fe1\u3057\u307e\u3059\u3002<\/li>
  4. HC-SR04\u306f\u3001\u30d1\u30eb\u30b9\u306e\u4f1d\u642c\u9045\u5ef6\u6642\u9593\u5206\u3060\u3051Echo\u7aef\u5b50\u3092High\u3067\u51fa\u529b\u3057\u307e\u3059\u3002<\/li>
  5. Echo\u7aef\u5b50\u304cHigh\u306b\u306a\u3063\u305f\u6642\u9593\u3092\u8a08\u6e2c\u3057\u3066\u5bfe\u8c61\u7269\u307e\u3067\u306e\u8ddd\u96e2\u3092\u7b97\u51fa\u3057\u307e\u3059\u3002<\/li><\/ol>\n\n\n\n

    \u8ddd\u96e2\u306e\u7b97\u51fa\u5f0f\uff1aDistance in cm = echo pulse width in uS\/58<\/p>\n\n\n\n

    \u5b9f\u969b\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u8a66\u9a13\u74b0\u5883\u3067\u3001\u5bfe\u8c61\u7269(\u6bb5\u30dc\u30fc\u30eb)\u309210cm\uff5e50cm\u307e\u30675cm\u5358\u4f4d\u3067\u305a\u3089\u3057\u306a\u304c\u3089\u8ddd\u96e2\u3092\u8a08\u6e2c\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

    \"\"<\/figure>\n\n\n\n

    \u8a08\u6e2c\u7d50\u679c\u3067\u3059\u3002\u601d\u3044\u306e\u307b\u304b\u7cbe\u5ea6\u304c\u51fa\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

    \u5b9f\u969b\u306e\u8ddd\u96e2(cm)<\/strong><\/td>\u6e2c\u5b9a\u7d50\u679c<\/strong>(cm)<\/strong><\/td><\/tr>
    10<\/td>10.7740533763<\/td><\/tr>
    15<\/td>15.1395797729<\/td><\/tr>
    20<\/td>20.3477925268<\/td><\/tr>
    25<\/td>25.0339508057<\/td><\/tr>
    30<\/td>30.1024009442<\/td><\/tr>
    35<\/td>34.9159898429<\/td><\/tr>
    40<\/td>40.000882642<\/td><\/tr>
    45<\/td>44.7733648892<\/td><\/tr>
    50<\/td>49.7431590639<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    \u6e2c\u5b9a\u306b\u4f7f\u7528\u3057\u305f\u7c21\u6613\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u3059\u3002\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u8a08\u6e2c\u8ddd\u96e2\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n

    \n#!\/usr\/bin\/env python\n# -*- coding: utf-8 -*-\n\nimport time\nimport RPi.GPIO as GPIO\n\nGPIO.setwarnings(False)\nGPIO.setmode(GPIO.BCM)\nTRIG = 27\nECHO = 22\n\n# GPIO\u7aef\u5b50\u306e\u521d\u671f\u8a2d\u5b9a\nGPIO.setup(TRIG,GPIO.OUT)\nGPIO.setup(ECHO,GPIO.IN)\nGPIO.output(TRIG, GPIO.LOW)\ntime.sleep(0.3)\n\n# Trig\u7aef\u5b50\u309210us\u4ee5\u4e0aHigh\nGPIO.output(TRIG, GPIO.HIGH)\ntime.sleep(0.00001)\nGPIO.output(TRIG, GPIO.LOW)\n\n# Echo\u30d1\u30eb\u30b9\u304cHigh\u306b\u306a\u308b\u6642\u9593\nwhile GPIO.input(ECHO) == 0:\n    echo_on = time.time()\n\n# Echo\u30d1\u30eb\u30b9\u304cLow\u306b\u306a\u308b\u6642\u9593\nwhile GPIO.input(ECHO) == 1:\n    echo_off = time.time()\n\n# Echo\u30d1\u30eb\u30b9\u306e\u30d1\u30eb\u30b9\u5e45(us)\necho_pulse_width = (echo_off - echo_on) * 1000000\n\n# \u8ddd\u96e2\u3092\u7b97\u51fa:Distance in cm = echo pulse width in uS\/58\ndistance = echo_pulse_width \/ 58\n\nprint distance\n<\/pre><\/div>\n\n\n
    \u3053\u308c\u3092\u4f7f\u3063\u3066\u3001\u4f53\u6e29\u6e2c\u5b9a\u6642\u306e\u8ddd\u96e2\u3092\u8a08\u6e2c\u3067\u304d\u308c\u3070\u3001\u81ea\u52d5\u3067\u30c7\u30fc\u30bf\u304c\u53d6\u308c\u308b\u306e\u3067\u52a9\u304b\u308a\u305d\u3046\u3067\u3059\u3002\u3061\u3087\u3063\u3068\u3001\u4f53\u6e29\u6e2c\u5b9a\u306e\u88dc\u6b63\u5024\u7b97\u51fa\u306b\u4f7f\u3063\u3066\u307f\u3088\u3046\u304b\u3068\u2026<\/p>\n\n\n\n
    <\/p>\n