{"id":51766,"date":"2025-08-11T06:44:19","date_gmt":"2025-08-10T22:44:19","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/51766.html"},"modified":"2025-08-11T06:44:19","modified_gmt":"2025-08-10T22:44:19","slug":"%e4%bc%a0%e6%84%9f%e5%99%a8%e5%ba%94%e7%94%a8%e6%a1%88%e4%be%8b%ef%bc%9a%e5%8e%8b%e5%8a%9b%e4%bc%a0%e6%84%9f%e5%99%a8%e5%9c%a8%e5%b7%a5%e4%b8%9a%e8%87%aa%e5%8a%a8%e5%8c%96%e4%b8%ad%e7%9a%84%e5%ba%94","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/51766.html","title":{"rendered":"\u4f20\u611f\u5668\u5e94\u7528\u6848\u4f8b\uff1a\u538b\u529b\u4f20\u611f\u5668\u5728\u5de5\u4e1a\u81ea\u52a8\u5316\u4e2d\u7684\u5e94\u7528_\uff089\uff09.\u538b\u529b\u4f20\u611f\u5668\u5728\u538b\u529b\u5bb9\u5668\u5b89\u5168\u76d1\u63a7\u4e2d\u7684\u5e94\u7528"},"content":{"rendered":"

\u538b\u529b\u4f20\u611f\u5668\u5728\u538b\u529b\u5bb9\u5668\u5b89\u5168\u76d1\u63a7\u4e2d\u7684\u5e94\u7528<\/h2>\n

\u538b\u529b\u5bb9\u5668\u7684\u5b89\u5168\u76d1\u63a7\u9700\u6c42<\/h3>\n

\u5728\u5de5\u4e1a\u751f\u4ea7\u8fc7\u7a0b\u4e2d，\u538b\u529b\u5bb9\u5668\u662f\u5e38\u89c1\u7684\u8bbe\u5907\u4e4b\u4e00，\u7528\u4e8e\u50a8\u5b58\u548c\u4f20\u8f93\u9ad8\u538b\u6c14\u4f53\u6216\u6db2\u4f53\u3002\u8fd9\u4e9b\u5bb9\u5668\u7684\u5b89\u5168\u6027\u80fd\u76f4\u63a5\u5173\u7cfb\u5230\u751f\u4ea7\u8bbe\u65bd\u7684\u6b63\u5e38\u8fd0\u884c\u548c\u4eba\u5458\u7684\u751f\u547d\u5b89\u5168\u3002\u56e0\u6b64，\u5bf9\u538b\u529b\u5bb9\u5668\u8fdb\u884c\u5b9e\u65f6\u76d1\u63a7\u662f\u975e\u5e38\u5fc5\u8981\u7684\u3002\u538b\u529b\u4f20\u611f\u5668\u4f5c\u4e3a\u5173\u952e\u7684\u6d4b\u91cf\u5de5\u5177，\u80fd\u591f\u51c6\u786e\u5730\u76d1\u6d4b\u5bb9\u5668\u5185\u90e8\u7684\u538b\u529b\u53d8\u5316，\u53ca\u65f6\u53d1\u73b0\u5f02\u5e38\u60c5\u51b5，\u786e\u4fdd\u751f\u4ea7\u8fc7\u7a0b\u7684\u5b89\u5168\u3002<\/p>\n

\u538b\u529b\u4f20\u611f\u5668\u7684\u7c7b\u578b\u548c\u5de5\u4f5c\u539f\u7406<\/h3>\n

\u538b\u529b\u4f20\u611f\u5668\u7684\u7c7b\u578b<\/h4>\n

\u538b\u529b\u4f20\u611f\u5668\u6709\u591a\u79cd\u7c7b\u578b，\u5e38\u89c1\u7684\u5305\u62ec：<\/p>\n

  • \u5e94\u53d8\u7247\u5f0f\u538b\u529b\u4f20\u611f\u5668：\u901a\u8fc7\u5e94\u53d8\u7247\u7684\u53d8\u5f62\u6765\u6d4b\u91cf\u538b\u529b\u53d8\u5316\u3002<\/li>\n
  • \u538b\u963b\u5f0f\u538b\u529b\u4f20\u611f\u5668：\u5229\u7528\u534a\u5bfc\u4f53\u6750\u6599\u7684\u538b\u963b\u6548\u5e94\u6765\u6d4b\u91cf\u538b\u529b\u3002<\/li>\n
  • \u7535\u5bb9\u5f0f\u538b\u529b\u4f20\u611f\u5668：\u901a\u8fc7\u6d4b\u91cf\u7535\u5bb9\u7684\u53d8\u5316\u6765\u53cd\u6620\u538b\u529b\u7684\u53d8\u5316\u3002<\/li>\n
  • \u538b\u7535\u5f0f\u538b\u529b\u4f20\u611f\u5668：\u5229\u7528\u538b\u7535\u6750\u6599\u7684\u7279\u6027，\u5c06\u538b\u529b\u8f6c\u6362\u4e3a\u7535\u4fe1\u53f7\u3002<\/li>\n
  • \u5149\u5b66\u5f0f\u538b\u529b\u4f20\u611f\u5668：\u901a\u8fc7\u5149\u7684\u6298\u5c04\u6216\u53cd\u5c04\u6765\u6d4b\u91cf\u538b\u529b\u3002<\/li>\n

    \u538b\u529b\u4f20\u611f\u5668\u7684\u5de5\u4f5c\u539f\u7406<\/h4>\n

    \u4ee5\u5e94\u53d8\u7247\u5f0f\u538b\u529b\u4f20\u611f\u5668\u4e3a\u4f8b，\u5176\u5de5\u4f5c\u539f\u7406\u5982\u4e0b：<\/p>\n

      \n
    • \u5e94\u53d8\u7247：\u5e94\u53d8\u7247\u662f\u4e00\u79cd\u80fd\u591f\u5c06\u673a\u68b0\u53d8\u5f62\u8f6c\u6362\u4e3a\u7535\u963b\u53d8\u5316\u7684\u5143\u4ef6\u3002\u5f53\u538b\u529b\u5bb9\u5668\u5185\u90e8\u7684\u538b\u529b\u53d8\u5316\u65f6，\u5e94\u53d8\u7247\u4f1a\u968f\u4e4b\u53d8\u5f62，\u5176\u7535\u963b\u503c\u4e5f\u4f1a\u53d1\u751f\u53d8\u5316\u3002<\/li>\n
    • \u60e0\u65af\u901a\u7535\u6865：\u5e94\u53d8\u7247\u901a\u5e38\u5b89\u88c5\u5728\u60e0\u65af\u901a\u7535\u6865\u4e2d，\u901a\u8fc7\u7535\u6865\u7535\u8def\u5c06\u7535\u963b\u53d8\u5316\u8f6c\u6362\u4e3a\u7535\u538b\u53d8\u5316\u3002<\/li>\n
    • \u4fe1\u53f7\u5904\u7406：\u7535\u538b\u53d8\u5316\u4fe1\u53f7\u901a\u8fc7\u653e\u5927\u5668\u548cAD\u8f6c\u6362\u5668\u5904\u7406\u540e，\u4f20\u9012\u7ed9\u63a7\u5236\u7cfb\u7edf\u6216\u76d1\u6d4b\u8bbe\u5907\u3002<\/li>\n<\/ul>\n

      \u538b\u529b\u4f20\u611f\u5668\u5728\u538b\u529b\u5bb9\u5668\u5b89\u5168\u76d1\u63a7\u4e2d\u7684\u5e94\u7528<\/h3>\n

      \u538b\u529b\u76d1\u6d4b<\/h4>\n

      \u538b\u529b\u4f20\u611f\u5668\u5b89\u88c5\u5728\u538b\u529b\u5bb9\u5668\u7684\u5173\u952e\u4f4d\u7f6e，\u5982\u5bb9\u5668\u7684\u9876\u90e8\u3001\u5e95\u90e8\u6216\u4fa7\u9762，\u7528\u4e8e\u5b9e\u65f6\u76d1\u6d4b\u5bb9\u5668\u5185\u90e8\u7684\u538b\u529b\u53d8\u5316\u3002\u901a\u8fc7\u8fd9\u4e9b\u4f20\u611f\u5668，\u53ef\u4ee5\u83b7\u53d6\u5bb9\u5668\u5185\u90e8\u538b\u529b\u7684\u7cbe\u786e\u6570\u636e，\u4ee5\u4fbf\u8fdb\u884c\u8fdb\u4e00\u6b65\u7684\u5206\u6790\u548c\u63a7\u5236\u3002<\/p>\n

      \u5f02\u5e38\u68c0\u6d4b<\/h4>\n

      \u5f53\u538b\u529b\u5bb9\u5668\u5185\u90e8\u7684\u538b\u529b\u8d85\u8fc7\u8bbe\u5b9a\u7684\u5b89\u5168\u8303\u56f4\u65f6，\u538b\u529b\u4f20\u611f\u5668\u4f1a\u7acb\u5373\u53d1\u51fa\u8b66\u62a5\u4fe1\u53f7\u3002\u63a7\u5236\u7cfb\u7edf\u63a5\u6536\u5230\u8fd9\u4e9b\u4fe1\u53f7\u540e，\u53ef\u4ee5\u91c7\u53d6\u76f8\u5e94\u7684\u63aa\u65bd，\u5982\u5173\u95ed\u8fdb\u6c14\u9600\u3001\u6253\u5f00\u6392\u6c14\u9600\u6216\u542f\u52a8\u51b7\u5374\u7cfb\u7edf，\u4ee5\u9632\u6b62\u4e8b\u6545\u53d1\u751f\u3002<\/p>\n

      \u6570\u636e\u91c7\u96c6\u4e0e\u5904\u7406<\/h4>\n

      \u786c\u4ef6\u8fde\u63a5<\/h5>\n

      \u538b\u529b\u4f20\u611f\u5668\u901a\u5e38\u901a\u8fc7\u6a21\u62df\u4fe1\u53f7\u8f93\u51fa\u538b\u529b\u6570\u636e，\u9700\u8981\u4e0eADC（\u6a21\u6570\u8f6c\u6362\u5668）\u8fde\u63a5，\u5c06\u6a21\u62df\u4fe1\u53f7\u8f6c\u6362\u4e3a\u6570\u5b57\u4fe1\u53f7\u3002\u7136\u540e，\u8fd9\u4e9b\u6570\u5b57\u4fe1\u53f7\u53ef\u4ee5\u901a\u8fc7\u901a\u4fe1\u63a5\u53e3（\u5982SPI\u3001I2C\u6216UART）\u4f20\u9012\u7ed9\u4e3b\u63a7\u7cfb\u7edf\u3002<\/p>\n

      \u4fe1\u53f7\u5904\u7406<\/h5>\n

      # \u5bfc\u5165\u5fc5\u8981\u7684\u5e93<\/span>
      \nimport<\/span> spidev
      \nimport<\/span> time<\/p>\n

      # \u521d\u59cb\u5316SPI\u63a5\u53e3<\/span>
      \nspi =<\/span> spidev.<\/span>SpiDev(<\/span>)<\/span>
      \nspi.<\/span>open<\/span>(<\/span>0<\/span>,<\/span> 0<\/span>)<\/span>
      \nspi.<\/span>max_speed_hz =<\/span> 1000000<\/span><\/p>\n

      # \u5b9a\u4e49ADC\u8bfb\u53d6\u51fd\u6570<\/span>
      \ndef<\/span> read_adc.<\/span>channel(<\/span>channel)<\/span>:<\/span>
      \n """
      \n \u8bfb\u53d6ADC\u901a\u9053\u7684\u503c
      \n :param channel: ADC\u901a\u9053\u53f7（0-7）
      \n :return: ADC\u503c
      \n """<\/span>
      \n if<\/span> channel ><\/span> 7<\/span> or<\/span> channel <<\/span> 0<\/span>:<\/span>
      \n return<\/span> –<\/span>1<\/span>
      \n r =<\/span> spi.<\/span>xfer2(<\/span>[<\/span>1<\/span>,<\/span> (<\/span>8<\/span> +<\/span> channel)<\/span> <<<\/span> 4<\/span>,<\/span> 0<\/span>]<\/span>)<\/span>
      \n adc =<\/span> (<\/span>(<\/span>r[<\/span>1<\/span>]<\/span> &<\/span> 3<\/span>)<\/span> <<<\/span> 8<\/span>)<\/span> +<\/span> r[<\/span>2<\/span>]<\/span>
      \n return<\/span> adc<\/p>\n

      # \u5b9a\u4e49\u538b\u529b\u8f6c\u6362\u51fd\u6570<\/span>
      \ndef<\/span> convert_to_pressure<\/span>(<\/span>adc_value)<\/span>:<\/span>
      \n """
      \n \u5c06ADC\u503c\u8f6c\u6362\u4e3a\u538b\u529b\u503c
      \n :param adc_value: ADC\u503c
      \n :return: \u538b\u529b\u503c（\u5355\u4f4d：Pa）
      \n """<\/span>
      \n # \u5047\u8bbe\u4f20\u611f\u5668\u7684\u7ebf\u6027\u8303\u56f4\u4e3a0-1023\u5bf9\u5e940-100000Pa<\/span>
      \n max_adc =<\/span> 1023<\/span>
      \n max_pressure =<\/span> 100000<\/span>
      \n pressure =<\/span> (<\/span>adc_value \/<\/span> max_adc)<\/span> *<\/span> max_pressure
      \n return<\/span> pressure<\/p>\n

      # \u4e3b\u5faa\u73af<\/span>
      \nwhile<\/span> True<\/span>:<\/span>
      \n adc_value =<\/span> read_adc.<\/span>channel(<\/span>0<\/span>)<\/span>
      \n pressure =<\/span> convert_to_pressure(<\/span>adc_value)<\/span>
      \n print<\/span>(<\/span>f"\u5f53\u524d\u538b\u529b: <\/span>{<\/span>pressure}<\/span><\/span> Pa"<\/span><\/span>)<\/span>
      \n time.<\/span>sleep(<\/span>1<\/span>)<\/span><\/p>\n

      \u5f02\u5e38\u5904\u7406<\/h4>\n

      \u5f53\u76d1\u6d4b\u5230\u7684\u538b\u529b\u503c\u8d85\u8fc7\u8bbe\u5b9a\u7684\u5b89\u5168\u8303\u56f4\u65f6，\u63a7\u5236\u7cfb\u7edf\u9700\u8981\u91c7\u53d6\u76f8\u5e94\u7684\u63aa\u65bd\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u5f02\u5e38\u5904\u7406\u793a\u4f8b：<\/p>\n

      # \u5bfc\u5165\u5fc5\u8981\u7684\u5e93<\/span>
      \nimport<\/span> RPi.<\/span>GPIO as<\/span> GPIO<\/p>\n

      # \u8bbe\u7f6eGPIO\u6a21\u5f0f<\/span>
      \nGPIO.<\/span>setmode(<\/span>GPIO.<\/span>BCM)<\/span>
      \nGPIO.<\/span>setup(<\/span>18<\/span>,<\/span> GPIO.<\/span>OUT)<\/span> # \u8fdb\u6c14\u9600<\/span>
      \nGPIO.<\/span>setup(<\/span>19<\/span>,<\/span> GPIO.<\/span>OUT)<\/span> # \u6392\u6c14\u9600<\/span>
      \nGPIO.<\/span>setup(<\/span>20<\/span>,<\/span> GPIO.<\/span>OUT)<\/span> # \u51b7\u5374\u7cfb\u7edf<\/span><\/p>\n

      # \u5b9a\u4e49\u5b89\u5168\u538b\u529b\u8303\u56f4<\/span>
      \nsafe_pressure_range =<\/span> (<\/span>0<\/span>,<\/span> 100000<\/span>)<\/span> # \u5047\u8bbe\u5b89\u5168\u8303\u56f4\u4e3a0-100000Pa<\/span><\/p>\n

      # \u5f02\u5e38\u5904\u7406\u51fd\u6570<\/span>
      \ndef<\/span> handle_exception<\/span>(<\/span>pressure)<\/span>:<\/span>
      \n """
      \n \u5904\u7406\u538b\u529b\u5f02\u5e38
      \n :param pressure: \u5f53\u524d\u538b\u529b\u503c
      \n """<\/span>
      \n if<\/span> pressure ><\/span> safe_pressure_range[<\/span>1<\/span>]<\/span>:<\/span>
      \n print<\/span>(<\/span>"\u538b\u529b\u8fc7\u9ad8，\u542f\u52a8\u5f02\u5e38\u5904\u7406\u7a0b\u5e8f"<\/span>)<\/span>
      \n GPIO.<\/span>output(<\/span>18<\/span>,<\/span> GPIO.<\/span>LOW)<\/span> # \u5173\u95ed\u8fdb\u6c14\u9600<\/span>
      \n GPIO.<\/span>output(<\/span>19<\/span>,<\/span> GPIO.<\/span>HIGH)<\/span> # \u6253\u5f00\u6392\u6c14\u9600<\/span>
      \n GPIO.<\/span>output(<\/span>20<\/span>,<\/span> GPIO.<\/span>HIGH)<\/span> # \u542f\u52a8\u51b7\u5374\u7cfb\u7edf<\/span>
      \n else<\/span>:<\/span>
      \n GPIO.<\/span>output(<\/span>18<\/span>,<\/span> GPIO.<\/span>HIGH)<\/span> # \u6253\u5f00\u8fdb\u6c14\u9600<\/span>
      \n GPIO.<\/span>output(<\/span>19<\/span>,<\/span> GPIO.<\/span>LOW)<\/span> # \u5173\u95ed\u6392\u6c14\u9600<\/span>
      \n GPIO.<\/span>output(<\/span>20<\/span>,<\/span> GPIO.<\/span>LOW)<\/span> # \u5173\u95ed\u51b7\u5374\u7cfb\u7edf<\/span><\/p>\n

      # \u4e3b\u5faa\u73af<\/span>
      \nwhile<\/span> True<\/span>:<\/span>
      \n adc_value =<\/span> read_adc.<\/span>channel(<\/span>0<\/span>)<\/span>
      \n pressure =<\/span> convert_to_pressure(<\/span>adc_value)<\/span>
      \n print<\/span>(<\/span>f"\u5f53\u524d\u538b\u529b: <\/span>{<\/span>pressure}<\/span><\/span> Pa"<\/span><\/span>)<\/span>
      \n handle_exception(<\/span>pressure)<\/span>
      \n time.<\/span>sleep(<\/span>1<\/span>)<\/span><\/p>\n

      \u6570\u636e\u8bb0\u5f55\u4e0e\u5206\u6790<\/h4>\n

      \u4e3a\u4e86\u8fdb\u4e00\u6b65\u5206\u6790\u538b\u529b\u53d8\u5316\u7684\u8d8b\u52bf，\u53ef\u4ee5\u5c06\u76d1\u6d4b\u5230\u7684\u538b\u529b\u6570\u636e\u8bb0\u5f55\u5230\u6587\u4ef6\u6216\u6570\u636e\u5e93\u4e2d\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b，\u5c06\u538b\u529b\u6570\u636e\u8bb0\u5f55\u5230CSV\u6587\u4ef6\u4e2d：<\/p>\n

      # \u5bfc\u5165\u5fc5\u8981\u7684\u5e93<\/span>
      \nimport<\/span> csv
      \nimport<\/span> time<\/p>\n

      # \u5b9a\u4e49CSV\u6587\u4ef6\u8def\u5f84<\/span>
      \ncsv_file =<\/span> 'pressure_data.csv'<\/span><\/p>\n

      # \u5199\u5165CSV\u6587\u4ef6\u7684\u51fd\u6570<\/span>
      \ndef<\/span> write_to_csv<\/span>(<\/span>pressure)<\/span>:<\/span>
      \n """
      \n \u5c06\u538b\u529b\u6570\u636e\u5199\u5165CSV\u6587\u4ef6
      \n :param pressure: \u5f53\u524d\u538b\u529b\u503c
      \n """<\/span>
      \n with<\/span> open<\/span>(<\/span>csv_file,<\/span> 'a'<\/span>,<\/span> newline=<\/span>''<\/span>)<\/span> as<\/span> file<\/span>:<\/span>
      \n writer =<\/span> csv.<\/span>writer(<\/span>file<\/span>)<\/span>
      \n writer.<\/span>writerow(<\/span>[<\/span>time.<\/span>strftime(<\/span>"%Y-%m-%d %H:%M:%S"<\/span>)<\/span>,<\/span> pressure]<\/span>)<\/span><\/p>\n

      # \u4e3b\u5faa\u73af<\/span>
      \nwhile<\/span> True<\/span>:<\/span>
      \n adc_value =<\/span> read_adc.<\/span>channel(<\/span>0<\/span>)<\/span>
      \n pressure =<\/span> convert_to_pressure(<\/span>adc_value)<\/span>
      \n print<\/span>(<\/span>f"\u5f53\u524d\u538b\u529b: <\/span>{<\/span>pressure}<\/span><\/span> Pa"<\/span><\/span>)<\/span>
      \n handle_exception(<\/span>pressure)<\/span>
      \n write_to_csv(<\/span>pressure)<\/span>
      \n time.<\/span>sleep(<\/span>1<\/span>)<\/span><\/p>\n

      \u6570\u636e\u53ef\u89c6\u5316<\/h4>\n

      \u901a\u8fc7\u6570\u636e\u53ef\u89c6\u5316\u5de5\u5177，\u53ef\u4ee5\u76f4\u89c2\u5730\u770b\u5230\u538b\u529b\u53d8\u5316\u7684\u8d8b\u52bf\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528Matplotlib\u5e93\u8fdb\u884c\u6570\u636e\u53ef\u89c6\u5316\u7684\u793a\u4f8b：<\/p>\n

      # \u5bfc\u5165\u5fc5\u8981\u7684\u5e93<\/span>
      \nimport<\/span> matplotlib.<\/span>pyplot as<\/span> plt
      \nimport<\/span> pandas as<\/span> pd
      \nimport<\/span> time<\/p>\n

      # \u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u6570\u636e<\/span>
      \ndef<\/span> read_csv_data<\/span>(<\/span>file_path)<\/span>:<\/span>
      \n """
      \n \u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u538b\u529b\u6570\u636e
      \n :param file_path: CSV\u6587\u4ef6\u8def\u5f84
      \n :return: DataFrame
      \n """<\/span>
      \n df =<\/span> pd.<\/span>read_csv(<\/span>file_path,<\/span> names=<\/span>[<\/span>'Timestamp'<\/span>,<\/span> 'Pressure'<\/span>]<\/span>)<\/span>
      \n return<\/span> df<\/p>\n

      # \u4e3b\u5faa\u73af<\/span>
      \nwhile<\/span> True<\/span>:<\/span>
      \n adc_value =<\/span> read_adc.<\/span>channel(<\/span>0<\/span>)<\/span>
      \n pressure =<\/span> convert_to_pressure(<\/span>adc_value)<\/span>
      \n print<\/span>(<\/span>f"\u5f53\u524d\u538b\u529b: <\/span>{<\/span>pressure}<\/span><\/span> Pa"<\/span><\/span>)<\/span>
      \n handle_exception(<\/span>pressure)<\/span>
      \n write_to_csv(<\/span>pressure)<\/span><\/p>\n

      # \u6bcf10\u79d2\u7ed8\u5236\u4e00\u6b21\u538b\u529b\u53d8\u5316\u56fe<\/span>
      \n if<\/span> time.<\/span>time(<\/span>)<\/span> %<\/span> 10<\/span> ==<\/span> 0<\/span>:<\/span>
      \n df =<\/span> read_csv_data(<\/span>csv_file)<\/span>
      \n plt.<\/span>figure(<\/span>figsize=<\/span>(<\/span>10<\/span>,<\/span> 5<\/span>)<\/span>)<\/span>
      \n plt.<\/span>plot(<\/span>df[<\/span>'Timestamp'<\/span>]<\/span>,<\/span> df[<\/span>'Pressure'<\/span>]<\/span>,<\/span> marker=<\/span>'o'<\/span>,<\/span> linestyle=<\/span>'-'<\/span>,<\/span> color=<\/span>'b'<\/span>)<\/span>
      \n plt.<\/span>xlabel(<\/span>'\u65f6\u95f4'<\/span>)<\/span>
      \n plt.<\/span>ylabel(<\/span>'\u538b\u529b (Pa)'<\/span>)<\/span>
      \n plt.<\/span>title(<\/span>'\u538b\u529b\u5bb9\u5668\u538b\u529b\u53d8\u5316\u8d8b\u52bf'<\/span>)<\/span>
      \n plt.<\/span>grid(<\/span>True<\/span>)<\/span>
      \n plt.<\/span>show(<\/span>)<\/span><\/p>\n

      time.<\/span>sleep(<\/span>1<\/span>)<\/span><\/p>\n

      \u901a\u4fe1\u4e0e\u8fdc\u7a0b\u76d1\u63a7<\/h4>\n

      \u4e3a\u4e86\u5b9e\u73b0\u8fdc\u7a0b\u76d1\u63a7，\u53ef\u4ee5\u5c06\u538b\u529b\u6570\u636e\u901a\u8fc7\u7f51\u7edc\u53d1\u9001\u5230\u4e2d\u592e\u76d1\u63a7\u7cfb\u7edf\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528MQTT\u534f\u8bae\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u7684\u793a\u4f8b：<\/p>\n

      # \u5bfc\u5165\u5fc5\u8981\u7684\u5e93<\/span>
      \nimport<\/span> paho.<\/span>mqtt.<\/span>client as<\/span> mqtt
      \nimport<\/span> time<\/p>\n

      # MQTT\u670d\u52a1\u5668\u914d\u7f6e<\/span>
      \nbroker =<\/span> 'your_mqtt_broker'<\/span>
      \nport =<\/span> 1883<\/span>
      \ntopic =<\/span> 'pressure_container\/pressure'<\/span><\/p>\n

      # MQTT\u8fde\u63a5\u56de\u8c03\u51fd\u6570<\/span>
      \ndef<\/span> on_connect<\/span>(<\/span>client,<\/span> userdata,<\/span> flags,<\/span> rc)<\/span>:<\/span>
      \n if<\/span> rc ==<\/span> 0<\/span>:<\/span>
      \n print<\/span>(<\/span>"\u8fde\u63a5\u6210\u529f"<\/span>)<\/span>
      \n else<\/span>:<\/span>
      \n print<\/span>(<\/span>f"\u8fde\u63a5\u5931\u8d25，\u8fd4\u56de\u7801：<\/span>{<\/span>rc}<\/span><\/span>"<\/span><\/span>)<\/span><\/p>\n

      # \u521d\u59cb\u5316MQTT\u5ba2\u6237\u7aef<\/span>
      \nclient =<\/span> mqtt.<\/span>Client(<\/span>)<\/span>
      \nclient.<\/span>on_connect =<\/span> on_connect
      \nclient.<\/span>connect(<\/span>broker,<\/span> port)<\/span><\/p>\n

      # \u53d1\u9001\u538b\u529b\u6570\u636e\u5230MQTT\u670d\u52a1\u5668<\/span>
      \ndef<\/span> send_to_mqtt<\/span>(<\/span>pressure)<\/span>:<\/span>
      \n """
      \n \u5c06\u538b\u529b\u6570\u636e\u53d1\u9001\u5230MQTT\u670d\u52a1\u5668
      \n :param pressure: \u5f53\u524d\u538b\u529b\u503c
      \n """<\/span>
      \n client.<\/span>publish(<\/span>topic,<\/span> f"<\/span>{<\/span>pressure}<\/span><\/span> Pa"<\/span><\/span>)<\/span><\/p>\n

      # \u4e3b\u5faa\u73af<\/span>
      \nwhile<\/span> True<\/span>:<\/span>
      \n adc_value =<\/span> read_adc.<\/span>channel(<\/span>0<\/span>)<\/span>
      \n pressure =<\/span> convert_to_pressure(<\/span>adc_value)<\/span>
      \n print<\/span>(<\/span>f"\u5f53\u524d\u538b\u529b: <\/span>{<\/span>pressure}<\/span><\/span> Pa"<\/span><\/span>)<\/span>
      \n handle_exception(<\/span>pressure)<\/span>
      \n write_to_csv(<\/span>pressure)<\/span>
      \n send_to_mqtt(<\/span>pressure)<\/span>
      \n time.<\/span>sleep(<\/span>1<\/span>)<\/span><\/p>\n

      \u5b89\u5168\u673a\u5236<\/h4>\n

      \u4e3a\u4e86\u786e\u4fdd\u7cfb\u7edf\u7684\u5b89\u5168，\u9700\u8981\u8bbe\u8ba1\u591a\u79cd\u5b89\u5168\u673a\u5236\u3002\u4f8b\u5982，\u53ef\u4ee5\u589e\u52a0\u5197\u4f59\u4f20\u611f\u5668，\u5f53\u591a\u4e2a\u4f20\u611f\u5668\u8bfb\u6570\u4e0d\u4e00\u81f4\u65f6，\u7cfb\u7edf\u4f1a\u53d1\u51fa\u8b66\u62a5\u3002\u6b64\u5916，\u53ef\u4ee5\u8bbe\u8ba1\u6545\u969c\u68c0\u6d4b\u548c\u81ea\u8bca\u65ad\u529f\u80fd，\u786e\u4fdd\u4f20\u611f\u5668\u548c\u7cfb\u7edf\u7684\u6b63\u5e38\u8fd0\u884c\u3002<\/p>\n

      \u5197\u4f59\u4f20\u611f\u5668<\/h5>\n

      # \u5bfc\u5165\u5fc5\u8981\u7684\u5e93<\/span>
      \nimport<\/span> spidev
      \nimport<\/span> time<\/p>\n

      # \u521d\u59cb\u5316SPI\u63a5\u53e3<\/span>
      \nspi =<\/span> spidev.<\/span>SpiDev(<\/span>)<\/span>
      \nspi.<\/span>open<\/span>(<\/span>0<\/span>,<\/span> 0<\/span>)<\/span>
      \nspi.<\/span>max_speed_hz =<\/span> 1000000<\/span><\/p>\n

      # \u5b9a\u4e49ADC\u8bfb\u53d6\u51fd\u6570<\/span>
      \ndef<\/span> read_adc_channel<\/span>(<\/span>channel)<\/span>:<\/span>
      \n """
      \n \u8bfb\u53d6ADC\u901a\u9053\u7684\u503c
      \n :param channel: ADC\u901a\u9053\u53f7（0-7）
      \n :return: ADC\u503c
      \n """<\/span>
      \n if<\/span> channel ><\/span> 7<\/span> or<\/span> channel <<\/span> 0<\/span>:<\/span>
      \n return<\/span> –<\/span>1<\/span>
      \n r =<\/span> spi.<\/span>xfer2(<\/span>[<\/span>1<\/span>,<\/span> (<\/span>8<\/span> +<\/span> channel)<\/span> <<<\/span> 4<\/span>,<\/span> 0<\/span>]<\/span>)<\/span>
      \n adc =<\/span> (<\/span>(<\/span>r[<\/span>1<\/span>]<\/span> &<\/span> 3<\/span>)<\/span> <<<\/span> 8<\/span>)<\/span> +<\/span> r[<\/span>2<\/span>]<\/span>
      \n return<\/span> adc<\/p>\n

      # \u5b9a\u4e49\u538b\u529b\u8f6c\u6362\u51fd\u6570<\/span>
      \ndef<\/span> convert_to_pressure<\/span>(<\/span>adc_value)<\/span>:<\/span>
      \n """
      \n \u5c06ADC\u503c\u8f6c\u6362\u4e3a\u538b\u529b\u503c
      \n :param adc_value: ADC\u503c
      \n :return: \u538b\u529b\u503c（\u5355\u4f4d：Pa）
      \n """<\/span>
      \n # \u5047\u8bbe\u4f20\u611f\u5668\u7684\u7ebf\u6027\u8303\u56f4\u4e3a0-1023\u5bf9\u5e940-100000Pa<\/span>
      \n max_adc =<\/span> 1023<\/span>
      \n max_pressure =<\/span> 100000<\/span>
      \n pressure =<\/span> (<\/span>adc_value \/<\/span> max_adc)<\/span> *<\/span> max_pressure
      \n return<\/span> pressure<\/p>\n

      # \u5b9a\u4e49\u5197\u4f59\u4f20\u611f\u5668\u8bfb\u53d6\u51fd\u6570<\/span>
      \ndef<\/span> read_redundant_sensors<\/span>(<\/span>)<\/span>:<\/span>
      \n """
      \n \u8bfb\u53d6\u5197\u4f59\u4f20\u611f\u5668\u7684\u538b\u529b\u503c
      \n :return: \u4e24\u4e2a\u4f20\u611f\u5668\u7684\u538b\u529b\u503c
      \n """<\/span>
      \n adc_value1 =<\/span> read_adc_channel(<\/span>0<\/span>)<\/span>
      \n adc_value2 =<\/span> read_adc_channel(<\/span>1<\/span>)<\/span>
      \n pressure1 =<\/span> convert_to_pressure(<\/span>adc_value1)<\/span>
      \n pressure2 =<\/span> convert_to_pressure(<\/span>adc_value2)<\/span>
      \n return<\/span> pressure1,<\/span> pressure2<\/p>\n

      # \u5b9a\u4e49\u5f02\u5e38\u5904\u7406\u51fd\u6570<\/span>
      \ndef<\/span> handle_exception<\/span>(<\/span>pressure1,<\/span> pressure2)<\/span>:<\/span>
      \n """
      \n \u5904\u7406\u538b\u529b\u5f02\u5e38
      \n :param pressure1: \u4f20\u611f\u56681\u7684\u5f53\u524d\u538b\u529b\u503c
      \n :param pressure2: \u4f20\u611f\u56682\u7684\u5f53\u524d\u538b\u529b\u503c
      \n """<\/span>
      \n if<\/span> abs<\/span>(<\/span>pressure1 –<\/span> pressure2)<\/span> ><\/span> 500<\/span>:<\/span> # \u5047\u8bbe\u5bb9\u5dee\u4e3a500Pa<\/span>
      \n print<\/span>(<\/span>"\u4f20\u611f\u5668\u8bfb\u6570\u4e0d\u4e00\u81f4，\u542f\u52a8\u6545\u969c\u68c0\u6d4b"<\/span>)<\/span>
      \n # \u6545\u969c\u68c0\u6d4b\u903b\u8f91<\/span>
      \n else<\/span>:<\/span>
      \n pressure =<\/span> (<\/span>pressure1 +<\/span> pressure2)<\/span> \/<\/span> 2<\/span>
      \n if<\/span> pressure ><\/span> safe_pressure_range[<\/span>1<\/span>]<\/span>:<\/span>
      \n print<\/span>(<\/span>"\u538b\u529b\u8fc7\u9ad8，\u542f\u52a8\u5f02\u5e38\u5904\u7406\u7a0b\u5e8f"<\/span>)<\/span>
      \n GPIO.<\/span>output(<\/span>18<\/span>,<\/span> GPIO.<\/span>LOW)<\/span> # \u5173\u95ed\u8fdb\u6c14\u9600<\/span>
      \n GPIO.<\/span>output(<\/span>19<\/span>,<\/span> GPIO.<\/span>HIGH)<\/span> # \u6253\u5f00\u6392\u6c14\u9600<\/span>
      \n GPIO.<\/span>output(<\/span>20<\/span>,<\/span> GPIO.<\/span>HIGH)<\/span> # \u542f\u52a8\u51b7\u5374\u7cfb\u7edf<\/span>
      \n else<\/span>:<\/span>
      \n GPIO.<\/span>output(<\/span>18<\/span>,<\/span> GPIO.<\/span>HIGH)<\/span> # \u6253\u5f00\u8fdb\u6c14\u9600<\/span>
      \n GPIO.<\/span>output(<\/span>19<\/span>,<\/span> GPIO.<\/span>LOW)<\/span> # \u5173\u95ed\u6392\u6c14\u9600<\/span>
      \n GPIO.<\/span>output(<\/span>20<\/span>,<\/span> GPIO.<\/span>LOW)<\/span> # \u5173\u95ed\u51b7\u5374\u7cfb\u7edf<\/span><\/p>\n

      # \u4e3b\u5faa\u73af<\/span>
      \nwhile<\/span> True<\/span>:<\/span>
      \n pressure1,<\/span> pressure2 =<\/span> read_redundant_sensors(<\/span>)<\/span>
      \n print<\/span>(<\/span>f"\u4f20\u611f\u56681\u538b\u529b: <\/span>{<\/span>pressure1}<\/span><\/span> Pa, \u4f20\u611f\u56682\u538b\u529b: <\/span>{<\/span>pressure2}<\/span><\/span> Pa"<\/span><\/span>)<\/span>
      \n handle_exception(<\/span>pressure1,<\/span> pressure2)<\/span>
      \n write_to_csv(<\/span>pressure1)<\/span>
      \n send_to_mqtt(<\/span>pressure1)<\/span>
      \n time.<\/span>sleep(<\/span>1<\/span>)<\/span><\/p>\n

      \u7cfb\u7edf\u96c6\u6210<\/h4>\n

      \u5728\u5b9e\u9645\u5e94\u7528\u4e2d，\u538b\u529b\u4f20\u611f\u5668\u7cfb\u7edf\u9700\u8981\u4e0e\u5176\u4ed6\u5de5\u4e1a\u8bbe\u5907\u548c\u63a7\u5236\u7cfb\u7edf\u8fdb\u884c\u96c6\u6210\u3002\u4f8b\u5982，\u53ef\u4ee5\u5c06\u538b\u529b\u4f20\u611f\u5668\u7684\u6570\u636e\u4e0e\u6e29\u5ea6\u4f20\u611f\u5668\u3001\u6d41\u91cf\u4f20\u611f\u5668\u7b49\u5176\u4ed6\u4f20\u611f\u5668\u7684\u6570\u636e\u8fdb\u884c\u7efc\u5408\u5206\u6790，\u4ee5\u66f4\u597d\u5730\u76d1\u63a7\u548c\u63a7\u5236\u751f\u4ea7\u8fc7\u7a0b\u3002<\/p>\n

      \u591a\u4f20\u611f\u5668\u96c6\u6210<\/h5>\n

      # \u5bfc\u5165\u5fc5\u8981\u7684\u5e93<\/span>
      \nimport<\/span> spidev
      \nimport<\/span> RPi.<\/span>GPIO as<\/span> GPIO
      \nimport<\/span> time<\/p>\n

      # \u521d\u59cb\u5316SPI\u63a5\u53e3<\/span>
      \nspi =<\/span> spidev.<\/span>SpiDev(<\/span>)<\/span>
      \nspi.<\/span>open<\/span>(<\/span>0<\/span>,<\/span> 0<\/span>)<\/span>
      \nspi.<\/span>max_speed_hz =<\/span> 1000000<\/span><\/p>\n

      # \u521d\u59cb\u5316GPIO\u6a21\u5f0f<\/span>
      \nGPIO.<\/span>setmode(<\/span>GPIO.<\/span>BCM)<\/span>
      \nGPIO.<\/span>setup(<\/span>18<\/span>,<\/span> GPIO.<\/span>OUT)<\/span> # \u8fdb\u6c14\u9600<\/span>
      \nGPIO.<\/span>setup(<\/span>19<\/span>,<\/span> GPIO.<\/span>OUT)<\/span> # \u6392\u6c14\u9600<\/span>
      \nGPIO.<\/span>setup(<\/span>20<\/span>,<\/span> GPIO.<\/span>OUT)<\/span> # \u51b7\u5374\u7cfb\u7edf<\/span><\/p>\n

      # \u5b9a\u4e49ADC\u8bfb\u53d6\u51fd\u6570<\/span>
      \ndef<\/span> read_adc_channel<\/span>(<\/span>channel)<\/span>:<\/span>
      \n """
      \n \u8bfb\u53d6ADC\u901a\u9053\u7684\u503c
      \n :param channel: ADC\u901a\u9053\u53f7（0-7）
      \n :return: ADC\u503c
      \n """<\/span>
      \n if<\/span> channel ><\/span> 7<\/span> or<\/span> channel <<\/span> 0<\/span>:<\/span>
      \n return<\/span> –<\/span>1<\/span>
      \n r =<\/span> spi.<\/span>xfer2(<\/span>[<\/span>1<\/span>,<\/span> (<\/span>8<\/span> +<\/span> channel)<\/span> <<<\/span> 4<\/span>,<\/span> 0<\/span>]<\/span>)<\/span>
      \n adc =<\/span> (<\/span>(<\/span>r[<\/span>1<\/span>]<\/span> &<\/span> 3<\/span>)<\/span> <<<\/span> 8<\/span>)<\/span> +<\/span> r[<\/span>2<\/span>]<\/span>
      \n return<\/span> adc<\/p>\n

      # \u5b9a\u4e49\u538b\u529b\u8f6c\u6362\u51fd\u6570<\/span>
      \ndef<\/span> convert_to_pressure<\/span>(<\/span>adc_value)<\/span>:<\/span>
      \n """
      \n \u5c06ADC\u503c\u8f6c\u6362\u4e3a\u538b\u529b\u503c
      \n :param adc_value: ADC\u503c
      \n :return: \u538b\u529b\u503c（\u5355\u4f4d：Pa）
      \n """<\/span>
      \n max_adc =<\/span> 1023<\/span>
      \n max_pressure =<\/span> 100000<\/span>
      \n pressure =<\/span> (<\/span>adc_value \/<\/span> max_adc)<\/span> *<\/span> max_pressure
      \n return<\/span> pressure<\/p>\n

      # \u5b9a\u4e49\u6e29\u5ea6\u8f6c\u6362\u51fd\u6570<\/span>
      \ndef<\/span> convert_to_temperature<\/span>(<\/span>adc_value)<\/span>:<\/span>
      \n """
      \n \u5c06ADC\u503c\u8f6c\u6362\u4e3a\u6e29\u5ea6\u503c
      \n :param adc_value: ADC\u503c
      \n :return: \u6e29\u5ea6\u503c（\u5355\u4f4d：\u2103）
      \n """<\/span>
      \n max_adc =<\/span> 1023<\/span>
      \n max_temperature =<\/span> 100<\/span> # \u5047\u8bbe\u4f20\u611f\u5668\u7684\u7ebf\u6027\u8303\u56f4\u4e3a0-1023\u5bf9\u5e940-100\u2103<\/span>
      \n temperature =<\/span> (<\/span>adc_value \/<\/span> max_adc)<\/span> *<\/span> max_temperature
      \n return<\/span> temperature<\/p>\n

      # \u5b9a\u4e49\u591a\u4f20\u611f\u5668\u8bfb\u53d6\u51fd\u6570<\/span>
      \ndef<\/span> read_sensors<\/span>(<\/span>)<\/span>:<\/span>
      \n """
      \n \u8bfb\u53d6\u591a\u4e2a\u4f20\u611f\u5668\u7684\u6570\u636e
      \n :return: \u538b\u529b\u503c\u548c\u6e29\u5ea6\u503c
      \n """<\/span>
      \n adc_value1 =<\/span> read_adc_channel(<\/span>0<\/span>)<\/span>
      \n adc_value2 =<\/span> read_adc_channel(<\/span>1<\/span>)<\/span>
      \n pressure =<\/span> convert_to_pressure(<\/span>adc_value1)<\/span>
      \n temperature =<\/span> convert_to_temperature(<\/span>adc_value2)<\/span>
      \n return<\/span> pressure,<\/span> temperature<\/p>\n

      # \u5b9a\u4e49\u5f02\u5e38\u5904\u7406\u51fd\u6570<\/span>
      \ndef<\/span> handle_exception<\/span>(<\/span>pressure,<\/span> temperature)<\/span>:<\/span>
      \n """
      \n \u5904\u7406\u538b\u529b\u548c\u6e29\u5ea6\u5f02\u5e38
      \n :param pressure: \u5f53\u524d\u538b\u529b\u503c
      \n :param temperature: \u5f53\u524d\u6e29\u5ea6\u503c
      \n """<\/span>
      \n if<\/span> pressure ><\/span> safe_pressure_range[<\/span>1<\/span>]<\/span> or<\/span> temperature ><\/span> safe_temperature_range[<\/span>1<\/span>]<\/span>:<\/span>
      \n print<\/span>(<\/span>"\u538b\u529b\u6216\u6e29\u5ea6\u8fc7\u9ad8，\u542f\u52a8\u5f02\u5e38\u5904\u7406\u7a0b\u5e8f"<\/span>)<\/span>
      \n GPIO.<\/span>output(<\/span>18<\/span>,<\/span> GPIO.<\/span>LOW)<\/span> # \u5173\u95ed\u8fdb\u6c14\u9600<\/span>
      \n GPIO.<\/span>output(<\/span>19<\/span>,<\/span> GPIO.<\/span>HIGH)<\/span> # \u6253\u5f00\u6392\u6c14\u9600<\/span>
      \n GPIO.<\/span>output(<\/span>20<\/span>,<\/span> GPIO.<\/span>HIGH)<\/span> # \u542f\u52a8\u51b7\u5374\u7cfb\u7edf<\/span>
      \n else<\/span>:<\/span>
      \n GPIO.<\/span>output(<\/span>18<\/span>,<\/span> GPIO.<\/span>HIGH)<\/span> # \u6253\u5f00\u8fdb\u6c14\u9600<\/span>
      \n GPIO.<\/span>output(<\/span>19<\/span>,<\/span> GPIO.<\/span>LOW)<\/span> # \u5173\u95ed\u6392\u6c14\u9600<\/span>
      \n GPIO.<\/span>output(<\/span>20<\/span>,<\/span> GPIO.<\/span>LOW)<\/span> # \u5173\u95ed\u51b7\u5374\u7cfb\u7edf<\/span><\/p>\n

      # \u4e3b\u5faa\u73af<\/span>
      \nwhile<\/span> True<\/span>:<\/span>
      \n pressure,<\/span> temperature =<\/span> read_sensors(<\/span>)<\/span>
      \n print<\/span>(<\/span>f"\u5f53\u524d\u538b\u529b: <\/span>{<\/span>pressure}<\/span><\/span> Pa, \u5f53\u524d\u6e29\u5ea6: <\/span>{<\/span>temperature}<\/span><\/span> \u2103"<\/span><\/span>)<\/span>
      \n handle_exception(<\/span>pressure,<\/span> temperature)<\/span>
      \n write_to_csv(<\/span>pressure,<\/span> temperature)<\/span>
      \n send_to_mqtt(<\/span>pressure,<\/span> temperature)<\/span>
      \n time.<\/span>sleep(<\/span>1<\/span>)<\/span><\/p>\n

      \u7ed3\u675f\u8bed<\/h4>\n

      \u901a\u8fc7\u4e0a\u8ff0\u5185\u5bb9，\u6211\u4eec\u8be6\u7ec6\u4ecb\u7ecd\u4e86\u538b\u529b\u4f20\u611f\u5668\u5728\u538b\u529b\u5bb9\u5668\u5b89\u5168\u76d1\u63a7\u4e2d\u7684\u5e94\u7528，\u5305\u62ec\u786c\u4ef6\u8fde\u63a5\u3001\u4fe1\u53f7\u5904\u7406\u3001\u5f02\u5e38\u5904\u7406\u3001\u6570\u636e\u8bb0\u5f55\u4e0e\u5206\u6790\u3001\u901a\u4fe1\u4e0e\u8fdc\u7a0b\u76d1\u63a7\u4ee5\u53ca\u7cfb\u7edf\u96c6\u6210\u3002\u8fd9\u4e9b\u6280\u672f\u7684\u5e94\u7528\u80fd\u591f\u786e\u4fdd\u538b\u529b\u5bb9\u5668\u7684\u5b89\u5168\u8fd0\u884c，\u63d0\u9ad8\u751f\u4ea7\u6548\u7387，\u51cf\u5c11\u4e8b\u6545\u98ce\u9669\u3002\u5e0c\u671b\u672c\u6559\u7a0b\u5bf9\u60a8\u5728\u5de5\u4e1a\u81ea\u52a8\u5316\u4e2d\u7684\u4f20\u611f\u5668\u5e94\u7528\u63d0\u4f9b\u6709\u4ef7\u503c\u7684\u53c2\u8003\u3002<\/p>\n

      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n","protected":false},"excerpt":{"rendered":"

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