{"id":2009,"date":"2021-07-22T10:57:10","date_gmt":"2021-07-22T02:57:10","guid":{"rendered":"http:\/\/www.unictron.com\/ultrasonic-transducers\/piezoelectric-technologies\/ultrasonic-gas-flow-meter\/"},"modified":"2021-07-22T11:27:23","modified_gmt":"2021-07-22T03:27:23","slug":"ultrasonic-gas-flow-meter","status":"publish","type":"page","link":"https:\/\/www.unictron.com\/ultrasonic-transducers\/piezoelectric-technologies\/ultrasonic-gas-flow-meter\/?lang=zh-hant","title":{"rendered":"\u8d85\u97f3\u6ce2\u71c3\u6c23\u8868"},"content":{"rendered":"\n

\u819c\u5f0f\u71c3\u6c23\u8868vs\u8d85\u97f3\u6ce2\u71c3\u6c23\u8868 :<\/strong><\/strong><\/h4>\n\n\n\n

\u50b3\u7d71\u7684\u5bb6\u5ead\u7528\u71c3\u6c23\u8868\u70ba\u6a5f\u68b0\u819c\u5f0f\u71c3\u6c23\u8868\uff0c\u5982\u4e0b\u5716\u6240\u793a\u3002<\/p>\n\n\n\n

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

\u56e0\u70ba\u819c\u5f0f\u71c3\u6c23\u8868\u70ba\u6a5f\u68b0\u5f0f\u7684\u52d5\u4f5c\uff0c\u6ed1\u95a5\u5bb9\u6613\u8207\u6d41\u9053\u7522\u751f\u9593\u9699\uff0c\u56e0\u800c\u7522\u751f\u6f0f\u6d41\uff0c\u6f0f\u6d41\u8d8a\u5927\uff0c\u5bb9\u7a4d\u5f0f\u6d41\u91cf\u8a08\u7684\u8aa4\u5dee\u8d8a\u5927\u3002\u57fa\u65bc\u4e0a\u8ff0\u539f\u56e0\uff0c\u71c3\u6c23\u8868\u696d\u8005\u5df2\u7a4d\u6975\u5c0b\u6c42\u66f4\u7cbe\u78ba\u7684\u71c3\u6c23\u6d41\u91cf\u8a08\u91cf\u65b9\u5f0f\uff0c\u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u5373\u70ba\u5176\u4e2d\u4e00\u7a2e\u5ee3\u70ba\u88ab\u770b\u597d\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u5176\u7279\u9ede\u70ba\u7121\u6a5f\u68b0\u5f80\u5fa9\u52d5\u4f5c\u3001\u53ef\u5075\u6e2c\u591a\u7a2e\u4e0d\u540c\u7a2e\u985e\u6c23\u9ad4\u3001\u9ad4\u7a4d\u5c0f\u3001\u91cd\u91cf\u8f15\u3001\u7cbe\u78ba\u5ea6\u9ad8\u3001\u4e14\u4e0d\u6703\u9020\u6210\u7ba1\u8def\u5167\u7684\u58d3\u529b\u640d\u5931\u3002\u8fd1\u5e74\u4f86\u5305\u62ec\u6b50\u6d32\u3001\u7f8e\u570b\u3001\u65e5\u672c\u7b49\u5148\u9032\u570b\u5bb6\u53ca\u5feb\u901f\u767c\u5c55\u4e2d\u7684\u4e2d\u570b\uff0c\u90fd\u5df2\u7a4d\u6975\u767c\u5c55\u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u3002\u96a8\u8457\u7db2\u8def\u7cfb\u7d71\u7684\u6210\u719f\u767c\u5c55\uff0c\u5168\u6578\u4f4d\u5316\u7684\u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u53ef\u4ee5\u900f\u904eIoT\u7cfb\u7d71\u7684\u9023\u7d50\uff0c\u9054\u5230\u5373\u6642\u76e3\u63a7\u4f7f\u7528\u80fd\u6e90\u7684\u6548\u7387\uff0c\u4e26\u53ef\u4f5c\u9060\u7aef\u5e33\u55ae\u7ba1\u7406\uff0c\u7bc0\u7701\u4e86\u5927\u91cf\u4eba\u5de5\u6284\u8868\u53ca\u7ba1\u7406\u7684\u6210\u672c\u3002<\/p>\n\n\n\n

\u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u7279\u6027:<\/strong><\/strong><\/h4>\n\n\n\n
  • \u7cbe\u5ea6\u9ad8\uff0c\u7cbe\u78ba\u5ea6\u53ef\u90540.1%<\/li>
  • \u8010\u7528\u3001\u53ef\u9760\u6027\u9ad8<\/li>
  • \u91cf\u6e2c\u6642\u4e0d\u6703\u9020\u6210\u7ba1\u8def\u5167\u7684\u58d3\u529b\u640d\u5931<\/li>
  • \u5bec\u5ee3\u7684\u6d41\u91cf\u6e2c\u5b9a\u7bc4\u570d<\/li>
  • \u53ef\u89c0\u5bdf\u77ac\u9593\u6d41\u91cf\u53ca\u7d2f\u7a4d\u6d41\u91cf<\/li>
  • \u53ef\u4f5c\u96d9\u5411\u6d41\u91cf\u91cf\u6e2c<\/li>
  • \u56e0\u7121\u53ef\u52d5\u96f6\u4ef6\uff0c\u5e7e\u4e4e\u7121\u9700\u4fdd\u990a\uff0c\u5927\u5e45\u5ea6\u7684\u6e1b\u5c11\u7dad\u8b77\u6210\u672c<\/li>
  • \u53ef\u4f5c\u7dda\u4e0a\u6574\u9ad4\u6027\u80fd\u8a3a\u65b7<\/li><\/ul>\n\n\n\n

    \u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u5de5\u4f5c\u539f\u7406:<\/strong><\/strong><\/h4>\n\n\n\n

    \u8d85\u97f3\u6ce2\u6d41\u91cf\u8a08\u7684\u6e2c\u91cf\u65b9\u5f0f\u662f\u5229\u7528\u8d85\u97f3\u6ce2\u65bc\u6d41\u9ad4\u4e0a\u4e0b\u6e38\u7684\u50b3\u64ad\u6642\u9593\u5dee( Difference Time of Flight, DToF) \u4f86\u91cf\u6e2c\u7ba1\u8def\u5167\u7684\u6d41\u9ad4\u6d41\u901f\uff0c\u518d\u85c9\u7531\u6d41\u901f\u4e58\u4e0a\u7ba1\u8def\u622a\u9762\u7a4d\uff0c\u63db\u7b97\u51fa\u6d41\u9ad4\u6d41\u91cf\u3002\u7576\u8d85\u97f3\u6ce2\u884c\u9032\u65b9\u5411\u8207\u6d41\u9ad4\u540c\u65b9\u5411\u6642\uff0c\u5176\u50b3\u64ad\u901f\u5ea6\u6703\u8f03\u5feb\uff0c\u53cd\u4e4b\u5247\u6703\u8f03\u6162\uff0c\u6211\u5011\u53ef\u5229\u7528\u5176\u50b3\u64ad\u7684\u6642\u9593\u5dee(DToF )\u4f86\u63a8\u7b97\u51fa\u6d41\u9ad4\u5728\u7ba1\u8def\u4e2d\u7684\u6d41\u901f\u53ca\u6d41\u91cf\u3002<\/p>\n\n\n\n

    \u5177\u9ad4\u65b9\u5f0f\u70ba\uff0c\u65bc\u7ba1\u8def\u6d41\u9053\u4e0a\u6e38\u53ca\u4e0b\u6e38\u4f4d\u7f6e\u4e0a\u5404\u5b89\u7f6e\u4e00\u9846\u8d85\u97f3\u6ce2\u50b3\u611f\u5668(\u53ef\u70ba\u53cd\u5c04\u5f0f(Type(I))\u6216\u76f4\u5c04\u5f0f(Type(II))\u7684\u8a2d\u7f6e)\uff0c\u5982\u4e0b\u5716\u6240\u793a\u3002\u8d85\u97f3\u6ce2\u5f9e\u4e0a\u6e38\u7684\u50b3\u611f\u5668A\u50b3\u64ad\u81f3\u50b3\u611f\u5668B\u7684\u6642\u9593(Tdown)\u8f03\u77ed\uff0c\u5f9e\u4e0b\u6e38\u50b3\u611f\u5668B\u50b3\u64ad\u81f3\u50b3\u611f\u5668A\u7684\u6642\u9593(Tup)\u8f03\u9577\u3002\u6211\u5011\u53ef\u91cf\u6e2c\u51fa\u5176\u50b3\u64ad\u6642\u9593(Tdown)\u53ca(Tup)\uff0c\u4e26\u8a08\u7b97\u5176\u6642\u9593\u5dee\uff0c\u5373\u53ef\u63a8\u7b97\u51fa\u7ba1\u8def\u6d41\u9053\u5167\u6d41\u9ad4\u7684\u6d41\u901f\uff0c\u518d\u4e58\u4e0a\u5df2\u77e5\u7684\u7ba1\u8def\u622a\u9762\u7a4d\uff0c\u5373\u53ef\u5f97\u5230\u6d41\u91cf\u503c\u3002<\/p>\n\n\n\n

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

    \u5f0f\u5b50(1)+(2) \u53ef\u5f97\u5230:<\/p>\n\n\n\n

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

    \u5f0f\u5b50(2)-(1) \u53ef\u5f97\u5230\uff0c<\/p>\n\n\n\n

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

    \u7531\u5f0f\u5b50(4)\u7684\u7d50\u679c\u53ef\u5f97\u77e5\uff0c\u6c23\u9ad4\u6d41\u901fV\u8207\u6c23\u9ad4\u8072\u901fC\u5927\u5c0f\u7121\u95dc\u3002\u7531\u5df2\u77e5\u7684\u7ba1\u8def\u622a\u9762\u7a4dA\uff0c\u4e58\u4e0a\u6c23\u9ad4\u6d41\u901fV\uff0c\u5373\u53ef\u5f97\u5230\u6c23\u9ad4\u6d41\u91cf\uff0c<\/p>\n\n\n\n

    \"\"
    \u5176\u4e2d\uff0c
    V : \u6c23\u9ad4\u6d41\u901f.
    C : \u6c23\u9ad4\u8072\u901f.
    Tup : \u8d85\u97f3\u6ce2\u7531\u50b3\u611f\u5668B\u81f3\u50b3\u611f\u5668A\u7684\u50b3\u64ad\u6642\u9593
    Tdown : \u8d85\u97f3\u6ce2\u7531\u50b3\u611f\u5668A\u81f3\u50b3\u611f\u5668B\u7684\u50b3\u64ad\u6642\u9593
    A : \u7ba1\u8def\u622a\u9762\u7a4d.
    Q : \u6c23\u9ad4\u6d41\u91cf.
    K : \u4fee\u6b63\u4fc2\u6578.<\/figcaption><\/figure>\n\n\n\n

    \u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u958b\u767c\u91cf\u6e2c\u7cfb\u7d71:<\/strong><\/strong><\/h4>\n\n\n\n

    \u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u9700\u8981\u4e00\u5957\u9ad8\u7cbe\u5bc6\u7684\u4fe1\u865f\u91cf\u6e2c\u7cfb\u7d71\u91cf\u6e2c\u4fe1\u865f\u53ca\u6f14\u7b97\u6d41\u91cf\uff0c\u4e00\u822c\u53ef\u9078\u64c7\u9069\u7528\u65bc\u5075\u6e2c\u8d85\u97f3\u6ce2\u6c23\u9ad4\u6d41\u91cf\u7684\u516c\u7248\u6e2c\u8a66\u96fb\u8def\uff0c\u4f8b\u5982 TI EVM430-FR6043\uff0c\u5982\u4e0b\u5716\u6240\u793a:<\/p>\n\n\n\n

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

    \u96fb\u8def\u677fEVM430-FR6043\u7684\u91cf\u6e2c\u7cbe\u5ea6\u53ef\u9054\u5230\u00b1250 \u76ae\u79d2(ps,10-12<\/sup>\u79d2)\uff0c\u53ef\u5e6b\u52a9\u6211\u5011\u7cbe\u78ba\u7684\u91cf\u6e2c\u6c23\u9ad4\u6d41\u91cf\u8a08\u4e2d\u91cd\u8981\u7684\u6027\u80fd\u53c3\u6578\uff0c\u5982\u6383\u983b\u91cd\u5408\u5ea6\uff0cADC \u5cf0\u503c\uff0c\u53ca\u975c\u614b\u96f6\u9ede\u98c4\u79fb(ZFD)\u7b49\uff0c\u4e0b\u5716\u662f\u8a60\u696d\u79d1\u6280\u958b\u767c\u7684\u9ad8\u6027\u80fd\u53ca\u9ad8\u53ef\u9760\u5ea6\u7684\u8d85\u97f3\u6ce2\u50b3\u611f\u5668A500A\uff0c\u5176\u5de5\u4f5c\u983b\u7387\u7d04\u70ba500 kHz\uff0c\u4f7f\u7528EVM430-FR6043\u6e2c\u8a66\u7684\u7d50\u679c:<\/p>\n\n\n\n

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

    \u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u570b\u5bb6\u6a19\u6e96:<\/strong><\/strong><\/h4>\n\n\n\n

    \u7531\u65bc\u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u64c1\u6709\u8af8\u591a\u660e\u986f\u7684\u512a\u9ede\uff0c\u56e0\u6b64\u4e00\u4e9b\u5148\u9032\u570b\u5bb6\u5982\u7f8e\u570b\uff0c\u65e5\u672c\u7b49\u7686\u5df2\u7d93\u572810\u591a\u5e74\u524d\u5c07\u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u5be6\u969b\u5b89\u88dd\u65bc\u5bb6\u5ead\u4e2d\u4f7f\u7528\uff0c\u4e5f\u5236\u5b9a\u4e86\u5176\u7522\u696d\u6a19\u6e96\uff0c\u5305\u62ec: \u5de5\u4f5c\u689d\u4ef6\uff0c\u6280\u8853\u8981\u6c42\uff0c\u8a66\u9a57\u65b9\u6cd5\uff0c\u6aa2\u6e2c\u898f\u7bc4\u7b49\u7b49\uff0c\u5982\u7f8e\u570b\u570b\u5bb6\u6a19\u6e96(AGA-9)\u53ca\u65e5\u672c\u570b\u5bb6\u6a19\u6e96(JIS B8571)\u3002\u4e2d\u570b\u653f\u5e9c\u6700\u8fd1\u4e5f\u5df2\u7a4d\u6975\u8d77\u8349\u201c\u5bb6\u7528\u8d85\u8072\u71c3\u6c23\u8868\u201d\u7684\u570b\u5bb6\u6a19\u6e96\u898f\u7bc4(JJG-0577.2)\uff0c\u4e26\u9810\u8a08\u65bc2021.10.1\u516c\u4f48\u5be6\u65bd\u3002<\/p>\n\n\n\n

    • \u7f8e\u570b\u570b\u5bb6\u6a19\u6e96(AGA-9)<\/li><\/ul>\n\n\n\n
      \"\"
      \u5176\u4e2d
      qi : \u6d41\u91cf(m3\/h)
      qt : \u5206\u754c\u6d41\u91cf
      qmin : \u6700\u5c0f\u6d41\u91cf
      qmax : \u6700\u5927\u6d41\u91cf<\/figcaption><\/figure><\/div>\n\n\n\n
      • \u65e5\u672c\u570b\u5bb6\u6a19\u6e96(JIS B8571)<\/li><\/ul>\n\n\n\n

        \u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u6700\u5927\u5141\u8a31\u8aa4\u5dee<\/p>\n\n\n\n

        \"\"<\/figure><\/div>\n\n\n\n
        • \u4e2d\u570b\u570b\u5bb6\u6a19\u6e96(GBT39841)<\/li><\/ul>\n\n\n\n

          \u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u6700\u5927\u5141\u8a31\u8aa4\u5dee<\/p>\n\n\n\n

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

          \u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u7684\u76e3\u6e2c\u8207\u554f\u984c\u8a3a\u65b7:<\/strong><\/strong><\/h4>\n\n\n\n

          \u9664\u4e86\u91cf\u6e2c\u7cbe\u5ea6\u9ad8\u53ca\u5e7e\u4e4e\u7121\u9700\u4f5c\u96f6\u4ef6\u4fdd\u990a\u7684\u7279\u6027\u5916\uff0c\u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u7684\u512a\u9ede\u4e4b\u4e00\u662f\u53ef\u4ee5\u4f5c\u7dda\u4e0a\u6574\u9ad4\u6027\u80fd\u8a3a\u65b7\uff0c\u9060\u8ddd\u76e3\u6e2c\u672c\u8eab\u7684\u5065\u5eb7\u72c0\u6cc1\uff0c\u5f9e\u800c\u80fd\u5373\u6642\u5f97\u77e5\u554f\u984c\u6240\u5728\uff0c\u53ca\u9810\u6e2c\u53ef\u80fd\u5373\u5c07\u767c\u751f\u7684\u6545\u969c\uff0c\u4e00\u822c\u5e38\u898b\u7684\u8a3a\u65b7\u6240\u63a1\u7528\u7684\u53c3\u6578\u5982\u4e0b:<\/p>\n\n\n\n

          Gain (\u589e\u76ca)<\/strong>
          \u73fe\u5728\u7684\u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u90fd\u6703\u5c0d\u63a5\u6536\u5668\u8a2d\u8a08\u6709\u8a0a\u865f\u81ea\u52d5\u589e\u76ca\u7684\u529f\u80fd\uff0c\u4f7f\u8a0a\u865f\u5f37\u5ea6\u80fd\u7dad\u6301\u5728\u67d0\u4e00\u8a2d\u8a08\u503c\u3002\u82e5\u767c\u73fe\u589e\u76ca\u589e\u52a0\uff0c\u8868\u793a\u8a0a\u865f\u6b63\u5728\u8b8a\u5f31\uff0c\u9019\u53ef\u80fd\u662f\u7531\u65bc\u8d85\u97f3\u6ce2\u50b3\u611f\u5668\u52a3\u5316\u3001\u8d85\u97f3\u6ce2\u50b3\u611f\u5668\u8868\u9762\u6c61\u67d3\u6216\u7ba1\u7dda\u4e2d\u6b98\u5b58\u7684\u6db2\u9ad4\u9020\u6210\u7684\u3002<\/p>\n\n\n\n

          Signal Quality (\u8a0a\u865f\u54c1\u8cea)<\/strong>
          \u7406\u60f3\u60c5\u6cc1\u4e0b\uff0c\u8d85\u97f3\u6ce2\u50b3\u611f\u5668\u767c\u5c04\u7aef\u767c\u9001\u7684\u8108\u885d\u90fd\u5c07\u88ab\u63a5\u6536\u7aef\u4f7f\u7528\u3002\u4f46\u6709\u6642\u8a0a\u865f\u6703\u5931\u771f\u3001\u592a\u5f31\uff0c\u6216\u8005\u63a5\u6536\u5230\u7684\u8108\u6c96\u4e0d\u7b26\u5408\u67d0\u4e9b\u6a19\u6e96\u3002\u7576\u9019\u7a2e\u60c5\u6cc1\u767c\u751f\u6642\uff0c\u96fb\u5b50\u96fb\u8def\u6703\u6392\u9664\u9019\u4e9b\u5076\u767c\u8a0a\u865f\u3002\u82e5\u904e\u591a\u6578\u91cf\u7684\u8108\u885d\u8a0a\u865f\u88ab\u6392\u9664\uff0c\u5c07\u6703\u5f71\u97ff\u6d41\u91cf\u8a08\u7684\u91cf\u6e2c\u7d50\u679c\u3002\u9020\u6210\u9019\u7a2e\u554f\u984c\u7684\u539f\u56e0\u6709\u5f88\u591a\u7a2e\uff0c\u9664\u4e86\u904e\u9ad8\u7684\u6c23\u9ad4\u6d41\u901f\u5916\uff0c\u50b3\u611f\u5668\u8868\u9762\u7684\u6c61\u67d3\u548c\u904e\u591a\u7684\u5916\u4f86\u7684\u8d85\u97f3\u6ce2\u566a\u8072\u662f\u5e38\u898b\u7684\u56e0\u7d20\u3002<\/p>\n\n\n\n

          Signal-to-Noise Ratio (\u8a0a\u566a\u6bd4)<\/strong>
          \u6bcf\u500b\u50b3\u611f\u5668\u90fd\u80fd\u5920\u63a5\u6536\u4efb\u4f55\u4f86\u81ea\u5916\u90e8\u6e90\u7684\u566a\u8072\u8a0a\u865f\uff0c\u566a\u8072\u589e\u5927\u6703\u964d\u4f4e\u8a0a\u566a\u6bd4\uff0c\u5f71\u97ff\u91cf\u6e2c\u7d50\u679c\u3002\u904e\u5927\u7684\u566a\u8072\u6703\u201d\u6df9\u6c92\u201d\u8a0a\u865f\uff0c\u5c0e\u81f4\u5100\u8868\u7121\u6cd5\u5de5\u4f5c\u3002\u566a\u8072\u767c\u751f\u7684\u539f\u56e0\u4e3b\u8981\u662f\u4f86\u81ea\u5916\u90e8\u6e90\u8a0a\u865f\u7684\u983b\u7387\u8207\u5f9e\u50b3\u611f\u5668\u672c\u8eab\u50b3\u8f38\u7684\u983b\u7387\u904e\u65bc\u76f8\u8fd1\u6240\u81f4\u3002\u53e6\u5916\uff0c\u63a5\u5730\u4e0d\u826f\u3001\u96fb\u5b50\u8a2d\u5099\u548c\u50b3\u611f\u5668\u4e4b\u9593\u7684\u96fb\u6c23\u9023\u63a5\u4e0d\u826f\u3001\u5916\u4f86\u7684\u96fb\u78c1\u6ce2\u5e72\u64fe\u3001\u63db\u80fd\u5668\u6c61\u67d3\u3001\u7ba1\u7dda\u9707\u52d5\u7b49\u7b49\uff0c\u90fd\u6709\u53ef\u80fd\u662f\u566a\u8072\u7684\u4f86\u6e90\u3002<\/p>\n\n\n\n

          Velocity Profile (\u6d41\u901f\u5206\u5e03\u66f2\u7dda)<\/strong>
          \u6c23\u9ad4\u65bc\u7ba1\u8def\u5167\u90e8\u7684\u6d41\u52d5\u901f\u5ea6\u6703\u5448\u66f2\u7dda\u5206\u5e03\uff0c\u8d8a\u63a5\u8fd1\u7ba1\u8def\u4e2d\u5fc3\uff0c\u6d41\u901f\u6703\u8d8a\u5feb\u3002\u4e00\u822c\u4f86\u8aaa\uff0c\u7ba1\u8def\u5167\u58c1\u8d8a\u7c97\u7cd9\uff0c\u6d41\u901f\u66f2\u7dda\u6703\u8d8a\u201d\u5c16\u92b3\u201d\u3002\u82e5\u7ba1\u8def\u5167\u90e8\u6709\u767c\u751f\u6c59\u67d3\u6216\u6709\u7570\u7269\uff0c\u5247\u5075\u6e2c\u5230\u7684\u6d41\u901f\u5206\u5e03\u66f2\u7dda\u6703\u767c\u751f\u660e\u986f\u8b8a\u5316\u3002<\/p>\n\n\n\n

          Speed of Sound (\u6c23\u9ad4\u8072\u901f)<\/strong>
          \u56e0\u6c23\u9ad4\u6d41\u91cf\u7684\u8a08\u7b97\u9700\u4f7f\u7528\u5230\u8d85\u97f3\u6ce2\u65bc\u6d41\u9ad4\u4e0a\u4e0b\u6e38\u7684\u50b3\u64ad\u6642\u9593\u6578\u503c\uff0c\u6839\u64da\u516c\u5f0f (4)\uff0c\u82e5\u91cf\u6e2c\u5f97\u5230\u7684\u8d85\u97f3\u6ce2\u50b3\u64ad\u6642\u9593\u6578\u503c\u7684\u8aa4\u5dee\u5927\uff0c\u5247\u6f14\u7b97\u51fa\u7684\u6d41\u901f\u8aa4\u5dee\u5c31\u5927\u3002\u56e0\u6b64\uff0c\u6839\u64da\u516c\u5f0f (3)\uff0c\u5b9a\u671f\u9a57\u8b49\u8072\u901f\u7684\u91cf\u6e2c\u503c\u8207\u8072\u901f\u7684\u7406\u8ad6\u503c\u6216\u662f\u8072\u901f\u7684\u7d93\u9a57\u503c\u662f\u5426\u7dad\u6301\u5728\u4e00\u5b9a\u7684\u5408\u7406\u7bc4\u570d\u5167\u662f\u5f88\u91cd\u8981\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

          \u819c\u5f0f\u71c3\u6c23\u8868vs\u8d85\u97f3\u6ce2\u71c3\u6c23\u8868 : \u50b3\u7d71\u7684\u5bb6\u5ead\u7528\u71c3\u6c23\u8868\u70ba\u6a5f\u68b0\u819c\u5f0f\u71c3\u6c23\u8868\uff0c\u5982\u4e0b\u5716\u6240\u793a\u3002 \u56e0\u70ba\u819c\u5f0f\u71c3\u6c23\u8868\u70ba\u6a5f\u68b0\u5f0f\u7684\u52d5\u4f5c\uff0c\u6ed1\u95a5\u5bb9\u6613\u8207\u6d41\u9053\u7522\u751f\u9593\u9699\uff0c\u56e0\u800c\u7522\u751f\u6f0f\u6d41\uff0c\u6f0f\u6d41\u8d8a\u5927\uff0c\u5bb9\u7a4d\u5f0f\u6d41\u91cf\u8a08\u7684\u8aa4\u5dee\u8d8a\u5927\u3002\u57fa\u65bc\u4e0a\u8ff0\u539f\u56e0\uff0c\u71c3\u6c23\u8868\u696d\u8005\u5df2\u7a4d\u6975\u5c0b\u6c42\u66f4\u7cbe\u78ba\u7684\u71c3\u6c23\u6d41\u91cf\u8a08\u91cf\u65b9\u5f0f\uff0c\u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u5373\u70ba\u5176\u4e2d\u4e00\u7a2e\u5ee3\u70ba\u88ab\u770b\u597d\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u5176\u7279\u9ede\u70ba\u7121\u6a5f\u68b0\u5f80\u5fa9\u52d5\u4f5c\u3001\u53ef\u5075\u6e2c\u591a\u7a2e\u4e0d\u540c\u7a2e\u985e\u6c23\u9ad4\u3001\u9ad4\u7a4d\u5c0f\u3001\u91cd\u91cf\u8f15\u3001\u7cbe\u78ba\u5ea6\u9ad8\u3001\u4e14\u4e0d\u6703\u9020\u6210\u7ba1\u8def\u5167\u7684\u58d3\u529b\u640d\u5931\u3002\u8fd1\u5e74\u4f86\u5305\u62ec\u6b50\u6d32\u3001\u7f8e\u570b\u3001\u65e5\u672c\u7b49\u5148\u9032\u570b\u5bb6\u53ca\u5feb\u901f\u767c\u5c55\u4e2d\u7684\u4e2d\u570b\uff0c\u90fd\u5df2\u7a4d\u6975\u767c\u5c55\u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u3002\u96a8\u8457\u7db2\u8def\u7cfb\u7d71\u7684\u6210\u719f\u767c\u5c55\uff0c\u5168\u6578\u4f4d\u5316\u7684\u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u53ef\u4ee5\u900f\u904eIoT\u7cfb\u7d71\u7684\u9023\u7d50\uff0c\u9054\u5230\u5373\u6642\u76e3\u63a7\u4f7f\u7528\u80fd\u6e90\u7684\u6548\u7387\uff0c\u4e26\u53ef\u4f5c\u9060\u7aef\u5e33\u55ae\u7ba1\u7406\uff0c\u7bc0\u7701\u4e86\u5927\u91cf\u4eba\u5de5\u6284\u8868\u53ca\u7ba1\u7406\u7684\u6210\u672c\u3002 \u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u7279\u6027: \u7cbe\u5ea6\u9ad8\uff0c\u7cbe\u78ba\u5ea6\u53ef\u90540.1% \u8010\u7528\u3001\u53ef\u9760\u6027\u9ad8 \u91cf\u6e2c\u6642\u4e0d\u6703\u9020\u6210\u7ba1\u8def\u5167\u7684\u58d3\u529b\u640d\u5931 \u5bec\u5ee3\u7684\u6d41\u91cf\u6e2c\u5b9a\u7bc4\u570d \u53ef\u89c0\u5bdf\u77ac\u9593\u6d41\u91cf\u53ca\u7d2f\u7a4d\u6d41\u91cf \u53ef\u4f5c\u96d9\u5411\u6d41\u91cf\u91cf\u6e2c \u56e0\u7121\u53ef\u52d5\u96f6\u4ef6\uff0c\u5e7e\u4e4e\u7121\u9700\u4fdd\u990a\uff0c\u5927\u5e45\u5ea6\u7684\u6e1b\u5c11\u7dad\u8b77\u6210\u672c \u53ef\u4f5c\u7dda\u4e0a\u6574\u9ad4\u6027\u80fd\u8a3a\u65b7 \u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u5de5\u4f5c\u539f\u7406: \u8d85\u97f3\u6ce2\u6d41\u91cf\u8a08\u7684\u6e2c\u91cf\u65b9\u5f0f\u662f\u5229\u7528\u8d85\u97f3\u6ce2\u65bc\u6d41\u9ad4\u4e0a\u4e0b\u6e38\u7684\u50b3\u64ad\u6642\u9593\u5dee( Difference Time of Flight, DToF) \u4f86\u91cf\u6e2c\u7ba1\u8def\u5167\u7684\u6d41\u9ad4\u6d41\u901f\uff0c\u518d\u85c9\u7531\u6d41\u901f\u4e58\u4e0a\u7ba1\u8def\u622a\u9762\u7a4d\uff0c\u63db\u7b97\u51fa\u6d41\u9ad4\u6d41\u91cf\u3002\u7576\u8d85\u97f3\u6ce2\u884c\u9032\u65b9\u5411\u8207\u6d41\u9ad4\u540c\u65b9\u5411\u6642\uff0c\u5176\u50b3\u64ad\u901f\u5ea6\u6703\u8f03\u5feb\uff0c\u53cd\u4e4b\u5247\u6703\u8f03\u6162\uff0c\u6211\u5011\u53ef\u5229\u7528\u5176\u50b3\u64ad\u7684\u6642\u9593\u5dee(DToF )\u4f86\u63a8\u7b97\u51fa\u6d41\u9ad4\u5728\u7ba1\u8def\u4e2d\u7684\u6d41\u901f\u53ca\u6d41\u91cf\u3002 \u5177\u9ad4\u65b9\u5f0f\u70ba\uff0c\u65bc\u7ba1\u8def\u6d41\u9053\u4e0a\u6e38\u53ca\u4e0b\u6e38\u4f4d\u7f6e\u4e0a\u5404\u5b89\u7f6e\u4e00\u9846\u8d85\u97f3\u6ce2\u50b3\u611f\u5668(\u53ef\u70ba\u53cd\u5c04\u5f0f(Type(I))\u6216\u76f4\u5c04\u5f0f(Type(II))\u7684\u8a2d\u7f6e)\uff0c\u5982\u4e0b\u5716\u6240\u793a\u3002\u8d85\u97f3\u6ce2\u5f9e\u4e0a\u6e38\u7684\u50b3\u611f\u5668A\u50b3\u64ad\u81f3\u50b3\u611f\u5668B\u7684\u6642\u9593(Tdown)\u8f03\u77ed\uff0c\u5f9e\u4e0b\u6e38\u50b3\u611f\u5668B\u50b3\u64ad\u81f3\u50b3\u611f\u5668A\u7684\u6642\u9593(Tup)\u8f03\u9577\u3002\u6211\u5011\u53ef\u91cf\u6e2c\u51fa\u5176\u50b3\u64ad\u6642\u9593(Tdown)\u53ca(Tup)\uff0c\u4e26\u8a08\u7b97\u5176\u6642\u9593\u5dee\uff0c\u5373\u53ef\u63a8\u7b97\u51fa\u7ba1\u8def\u6d41\u9053\u5167\u6d41\u9ad4\u7684\u6d41\u901f\uff0c\u518d\u4e58\u4e0a\u5df2\u77e5\u7684\u7ba1\u8def\u622a\u9762\u7a4d\uff0c\u5373\u53ef\u5f97\u5230\u6d41\u91cf\u503c\u3002 \u5f0f\u5b50(1)+(2) \u53ef\u5f97\u5230: \u5f0f\u5b50(2)-(1) \u53ef\u5f97\u5230\uff0c \u7531\u5f0f\u5b50(4)\u7684\u7d50\u679c\u53ef\u5f97\u77e5\uff0c\u6c23\u9ad4\u6d41\u901fV\u8207\u6c23\u9ad4\u8072\u901fC\u5927\u5c0f\u7121\u95dc\u3002\u7531\u5df2\u77e5\u7684\u7ba1\u8def\u622a\u9762\u7a4dA\uff0c\u4e58\u4e0a\u6c23\u9ad4\u6d41\u901fV\uff0c\u5373\u53ef\u5f97\u5230\u6c23\u9ad4\u6d41\u91cf\uff0c \u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u958b\u767c\u91cf\u6e2c\u7cfb\u7d71: \u8d85\u97f3\u6ce2\u71c3\u6c23\u8868\u9700\u8981\u4e00\u5957\u9ad8\u7cbe\u5bc6\u7684\u4fe1\u865f\u91cf\u6e2c\u7cfb\u7d71\u91cf\u6e2c\u4fe1\u865f\u53ca\u6f14\u7b97\u6d41\u91cf\uff0c\u4e00\u822c\u53ef\u9078\u64c7\u9069\u7528\u65bc\u5075\u6e2c\u8d85\u97f3\u6ce2\u6c23\u9ad4\u6d41\u91cf\u7684\u516c\u7248\u6e2c\u8a66\u96fb\u8def\uff0c\u4f8b\u5982…<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":430,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"spay_email":""},"_links":{"self":[{"href":"https:\/\/www.unictron.com\/ultrasonic-transducers\/wp-json\/wp\/v2\/pages\/2009"}],"collection":[{"href":"https:\/\/www.unictron.com\/ultrasonic-transducers\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.unictron.com\/ultrasonic-transducers\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.unictron.com\/ultrasonic-transducers\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.unictron.com\/ultrasonic-transducers\/wp-json\/wp\/v2\/comments?post=2009"}],"version-history":[{"count":1,"href":"https:\/\/www.unictron.com\/ultrasonic-transducers\/wp-json\/wp\/v2\/pages\/2009\/revisions"}],"predecessor-version":[{"id":2021,"href":"https:\/\/www.unictron.com\/ultrasonic-transducers\/wp-json\/wp\/v2\/pages\/2009\/revisions\/2021"}],"up":[{"embeddable":true,"href":"https:\/\/www.unictron.com\/ultrasonic-transducers\/wp-json\/wp\/v2\/pages\/430"}],"wp:attachment":[{"href":"https:\/\/www.unictron.com\/ultrasonic-transducers\/wp-json\/wp\/v2\/media?parent=2009"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}