{"id":5757,"date":"2026-09-15T11:33:30","date_gmt":"2026-09-15T03:33:30","guid":{"rendered":"https:\/\/prognosistech.com\/?page_id=5757"},"modified":"2026-09-15T11:47:47","modified_gmt":"2026-09-15T03:47:47","slug":"fft","status":"publish","type":"page","link":"https:\/\/prognosistech.com\/en\/fft\/","title":{"rendered":"FFT \u983b\u8b5c\u5206\u6790\u8207\u6545\u969c\u8a3a\u65b7"},"content":{"rendered":"
\n\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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FFT \u983b\u8b5c\u5206\u6790\u662f\u4ec0\u9ebc\uff1f
\u5982\u4f55\u5229\u7528\u632f\u52d5\u983b\u8b5c\u627e\u51fa\u8a2d\u5099\u6545\u969c<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\u632f\u52d5\u76e3\u6e2c\u662f\u767c\u73fe\u8a2d\u5099\u7570\u5e38\uff0cFFT \u983b\u8b5c\u5206\u6790\u5247\u80fd\u9032\u4e00\u6b65\u5354\u52a9\u627e\u51fa\u7570\u5e38\u7684\u539f\u56e0\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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\u5de5\u696d\u8a2d\u5099\u5728\u904b\u8f49\u6642\uff0c\u591a\u5c11\u90fd\u6703\u7522\u751f\u632f\u52d5\u3002<\/p>

\u900f\u904eMEMS vibration sensor<\/strong>\uff0c\u6211\u5011\u53ef\u4ee5\u6536\u96c6\u8a2d\u5099\u904b\u8f49\u6642\u7684\u632f\u52d5\u8a0a\u865f\u3002\u4f46\u5982\u679c\u53ea\u770b\u5230\u300c\u632f\u52d5\u8b8a\u5927\u300d\uff0c\u5176\u5be6\u9084\u4e0d\u5bb9\u6613\u77e5\u9053\u8a2d\u5099\u5230\u5e95\u51fa\u4e86\u4ec0\u9ebc\u554f\u984c\u3002<\/p>

\u9019\u6642\u5019\uff0c\u5c31\u53ef\u4ee5\u900f\u904e FFT \u983b\u8b5c\u5206\u6790<\/strong>\uff0c\u9032\u4e00\u6b65\u5f9e\u632f\u52d5\u8a0a\u865f\u4e2d\u627e\u51fa\u8a2d\u5099\u7684\u7570\u5e38\u7279\u5fb5\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
\n\t\t\t
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FFT \u983b\u8b5c\u5206\u6790\u662f\u4ec0\u9ebc\uff1f<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

FFT \u662f Fast Fourier Transform\uff08\u5feb\u901f\u5085\u7acb\u8449\u8f49\u63db\uff09\u7684\u7e2e\u5beb\u3002<\/p>

\u5b83\u53ef\u4ee5\u628a\u539f\u672c\u96a8\u8457\u300c\u6642\u9593\u300d\u8b8a\u5316\u7684\u632f\u52d5\u8a0a\u865f\uff0c\u8f49\u63db\u6210\u300c\u983b\u7387\u300d\u7684\u8cc7\u8a0a\u3002<\/p>

\u4f8b\u5982\uff0c\u632f\u52d5\u611f\u6e2c\u5668\u6536\u96c6\u5230\u4e00\u6bb5\u8a2d\u5099\u632f\u52d5\u8cc7\u6599\u5f8c\uff0c\u539f\u672c\u770b\u5230\u7684\u662f\uff1a<\/p>

\u8a2d\u5099\u5728\u4e0d\u540c\u6642\u9593\u7684\u632f\u52d5\u8b8a\u5316<\/strong><\/p>

\u7d93\u904e FFT \u5206\u6790\u5f8c\uff0c\u53ef\u4ee5\u770b\u5230\uff1a<\/p>

\u8a2d\u5099\u5728\u54ea\u4e9b\u983b\u7387\u7522\u751f\u8f03\u660e\u986f\u7684\u632f\u52d5<\/strong><\/p>

\u900f\u904e\u9019\u4e9b\u983b\u7387\u7279\u5fb5\uff0c\u5c31\u80fd\u9032\u4e00\u6b65\u8207\u8a2d\u5099\u7684\u8f49\u901f\u3001\u8ef8\u627f\u3001\u9f52\u8f2a\u7b49\u8cc7\u8a0a\u9032\u884c\u6bd4\u5c0d\uff0c\u5354\u52a9\u5224\u65b7\u8a2d\u5099\u53ef\u80fd\u767c\u751f\u7684\u6545\u969c\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

\n\t\t\t\t\t\t
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\u70ba\u4ec0\u9ebc\u9700\u8981\u505a FFT\uff1f<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

\u5047\u8a2d\u4e00\u53f0\u99ac\u9054\u51fa\u73fe\u7570\u5e38\u632f\u52d5\u3002\u55ae\u7d14\u770b\u5230\u632f\u52d5\u6578\u503c\u8b8a\u9ad8\uff0c\u6211\u5011\u53ea\u80fd\u77e5\u9053\uff1a<\/span>\u300c\u9019\u53f0\u99ac\u9054\u53ef\u80fd\u6709\u554f\u984c\u3002\u300d\uff0c<\/span>\u4f46\u9084\u4e0d\u77e5\u9053\u554f\u984c\u4f86\u81ea\u54ea\u88e1\u3002<\/span><\/p>\n

\u53ef\u80fd\u662f\uff1a<\/p>\n

    \n
  • \n
      \n
    • \u99ac\u9054\u8f49\u5b50\u4e0d\u5e73\u8861<\/li>\n
    • \u8ef8\u5fc3\u4e0d\u5c0d\u5fc3<\/li>\n
    • Bearing Degradation<\/li>\n
    • Structural Looseness<\/li>\n
    • Gear Defects<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

      FFT \u7684\u50f9\u503c\u5c31\u5728\u65bc\uff0c\u80fd\u5920\u628a\u8907\u96dc\u7684\u632f\u52d5\u8a0a\u865f\u62c6\u89e3\u6210\u4e0d\u540c\u983b\u7387\uff0c\u8b93\u6211\u5011\u9032\u4e00\u6b65\u89c0\u5bdf\uff1a<\/p>\n

      \n

      \u300c\u8a2d\u5099\u4e3b\u8981\u5728\u54ea\u4e9b\u983b\u7387\u7522\u751f\u7570\u5e38\uff1f\u300d<\/strong><\/p>\n<\/blockquote>\n

      \u518d\u5c07\u9019\u4e9b\u983b\u7387\u8207\u5df2\u77e5\u7684\u8a2d\u5099\u6545\u969c\u7279\u5fb5\u9032\u884c\u5206\u6790\uff0c\u5c31\u80fd\u5354\u52a9\u627e\u51fa\u53ef\u80fd\u7684\u6545\u969c\u539f\u56e0\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

      \n\t\t\t\t\t\t
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      \n\t\t\t\t\t

      \u5982\u4f55\u770b\u61c2FFT \u983b\u8b5c\u5716\uff1f\u91cd\u9ede\u770b\u9019\u5169\u8ef8<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
      \n\t\t\t\t
      \n\t\t\t\t\t\t\t\t\t

      \u89e3\u8b80\u983b\u8b5c\u5716\u5176\u5be6\u4e0d\u8907\u96dc\uff0c\u95dc\u9375\u5728\u65bc\u89c0\u5bdf X \u8ef8\u8207 Y \u8ef8<\/b> \u7684\u642d\u914d\uff1a<\/p>

      • X \u8ef8\uff08\u983b\u7387 Hz\uff09\uff1a\u5c0b\u627e\u6545\u969c\u4f4d\u7f6e<\/b><\/p>

        • \u4ee3\u8868\u632f\u52d5\u767c\u751f\u7684\u983b\u7387\u3002\u5c07\u8a2d\u5099\u8f49\u901f\u9664\u4ee5 60 \u5373\u53ef\u7b97\u51fa\u57fa\u6e96\u8f49\u983b1X<\/span>\u3002
          \u7bc4\u4f8b<\/b>\uff1a\u8f49\u901f1,800RPM\/60 = 30Hz<\/span>\uff081X<\/span>\uff09\u3002
          \u3000\u3000\u3000\u82e5 30 Hz<\/span>\u00a0\u51fa\u73fe\u660e\u986f\u80fd\u91cf\u5cf0\u503c\uff08Peak\uff09\uff0c\u4ee3\u8868\u632f\u52d5\u8207\u4e3b\u8ef8\u904b\u8f49\u76f4\u63a5\u76f8\u95dc\u3002<\/p><\/li><\/ul><\/li>

        • Y \u8ef8\uff08\u632f\u5e45 Amplitude\uff09\uff1a\u8a55\u4f30\u56b4\u91cd\u7a0b\u5ea6<\/b><\/p>

          • \u4ee3\u8868\u8a72\u983b\u7387\u4e0b\u7684\u632f\u52d5\u5f37\u5ea6\u3002Peak \u8d8a\u9ad8\uff0c\u4ee3\u8868\u8a72\u983b\u7387\u7684\u632f\u52d5\u80fd\u91cf\u8d8a\u5f37\u3002<\/p><\/li><\/ul><\/li><\/ul>

            \u4e0d\u904e\u8981\u6ce8\u610f\uff1a<\/p>

            \u770b\u5230\u4e00\u500b Peak\uff0c\u4e26\u4e0d\u80fd\u76f4\u63a5\u4ee3\u8868\u67d0\u4e00\u7a2e\u6545\u969c\u3002<\/p><\/blockquote>

            \u5be6\u969b\u6545\u969c\u8a3a\u65b7\u9084\u9700\u8981\u642d\u914d\u8a2d\u5099\u8f49\u901f\u3001\u6e2c\u9ede\u3001\u8a2d\u5099\u7d50\u69cb\u53ca\u5176\u4ed6\u632f\u52d5\u7279\u5fb5\u4e00\u8d77\u5224\u65b7\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

            \n\t\t\t\t\t\t
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            \n\t\t\t\t\t

            \u6709\u632f\u52d5\u6578\u64da\uff0c\u5c31\u80fd\u9032\u884c\u6545\u969c\u8a3a\u65b7\u55ce\uff1f<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
            \n\t\t\t\t
            \n\t\t\t\t\t\t\t\t\t

            \u4e0d\u4e00\u5b9a\u3002<\/strong><\/p>

            \u9019\u4e5f\u662f\u8a2d\u5099\u632f\u52d5\u5206\u6790\u4e2d\u5f88\u91cd\u8981\u7684\u4e00\u500b\u89c0\u5ff5\u3002<\/p>

            \u73fe\u5728\u53d6\u5f97\u8a2d\u5099\u632f\u52d5\u6578\u64da\u4e26\u4e0d\u56f0\u96e3\uff0c\u4f46\uff1a<\/p>

            \u6709\u6578\u64da \u2260 \u6709\u8a3a\u65b7\u80fd\u529b\u3002<\/strong><\/p>

            For example:<\/p>

            \u300c\u8a2d\u5099\u632f\u52d5\u8b8a\u5927\u4e86\u3002\u300d<\/p>

            \u9019\u53ea\u80fd\u544a\u8a34\u6211\u5011\u8a2d\u5099\u53ef\u80fd\u51fa\u73fe\u7570\u5e38\u3002<\/p>

            \u771f\u6b63\u7684\u554f\u984c\u662f\uff1a<\/p>

            \u300c\u70ba\u4ec0\u9ebc\u632f\u52d5\u8b8a\u5927\uff1f\u300d<\/strong><\/p>

            \u9019\u5c31\u9700\u8981\u9032\u4e00\u6b65\u5206\u6790\u632f\u52d5\u8a0a\u865f\u8207\u6545\u969c\u7279\u5fb5\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

            \n\t\t\t
            \n\t\t\t\t\t\t
            \n\t\t\t\t
            \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
            \n\t\t\t\t\t\t
            \n\t\t\t\t\t
            \n\t\t\t
            \n\t\t\t\t\t\t
            \n\t\t\t\t
            \n\t\t\t\t\t

            \u5f9e\u632f\u52d5\u76e3\u6e2c\u8d70\u5411\u667a\u6167\u6545\u969c\u8a3a\u65b7<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
            \n\t\t\t\t
            \n\t\t\t\t\t\t\t\t\t

            \u5c0d\u5de5\u696d\u8a2d\u5099\u800c\u8a00\uff0c\u771f\u6b63\u6709\u50f9\u503c\u7684\u4e26\u4e0d\u53ea\u662f\u6536\u96c6\u66f4\u591a\u6578\u64da\uff0c\u800c\u662f\u8b93\u6578\u64da\u80fd\u5920\u5354\u52a9\u5224\u65b7\u8a2d\u5099\u72c0\u614b<\/strong>\u3002<\/p>

            FFT \u983b\u8b5c\u5206\u6790\u53ef\u4ee5\u5f9e\u8907\u96dc\u7684\u632f\u52d5\u8a0a\u865f\u4e2d\u627e\u51fa\u983b\u7387\u7279\u5fb5\uff0c\u800c\u7d50\u5408\u6545\u969c\u8cc7\u6599\u5eab\u8207\u667a\u6167\u5206\u6790\u6280\u8853\u5f8c\uff0c\u5247\u80fd\u9032\u4e00\u6b65\u5354\u52a9\u8a2d\u5099\u6545\u969c\u8a3a\u65b7\u3002<\/p>

            \u56e0\u6b64\uff0c\u8a2d\u5099\u5065\u5eb7\u7ba1\u7406\u53ef\u4ee5\u5f9e\uff1a\u300c\u8a2d\u5099\u6709\u6c92\u6709\u7570\u5e38\uff1f\u300d\uff0c<\/strong>\u9032\u4e00\u6b65\u8d70\u5411\uff1a\u300c\u53ef\u80fd\u662f\u54ea\u4e00\u7a2e\u6545\u969c\uff1f\u300d\uff0c<\/strong>\u6700\u5f8c\u5354\u52a9\u7dad\u8b77\u4eba\u54e1\uff1a\u300c\u61c9\u8a72\u512a\u5148\u6aa2\u67e5\u4ec0\u9ebc\uff1f\u300d<\/strong><\/p>

            \u9019\u4e5f\u662f\u632f\u52d5\u76e3\u6e2c\u5f9e\u55ae\u7d14\u7684\u6578\u64da\u6536\u96c6<\/strong>\uff0c\u8d70\u5411\u667a\u6167\u6545\u969c\u8a3a\u65b7<\/strong>\u7684\u91cd\u8981\u4e00\u6b65\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

            \n\t\t\t\t\t\t
            \n\t\t\t\t\t
            \n\t\t\t
            \n\t\t\t\t\t\t
            \n\t\t\t\t
            \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
            \n\t\t\t
            \n\t\t\t\t\t\t
            \n\t\t\t\t
            \n\t\t\t\t\t

            FFT \u983b\u8b5c\u5206\u6790\u662f\u632f\u52d5\u5206\u6790\u8207\u8a2d\u5099\u6545\u969c\u8a3a\u65b7\u7684\u91cd\u8981\u5de5\u5177\u3002<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
            \n\t\t\t\t
            \n\t\t\t\t\t\t\t\t\t

            \u900f\u904e\u5c07\u632f\u52d5\u8a0a\u865f\u8f49\u63db\u6210\u983b\u7387\u8cc7\u8a0a\uff0c\u53ef\u4ee5\u5f9e\u983b\u8b5c\u4e2d\u89c0\u5bdf\u8a2d\u5099\u7684\u8f49\u983b\u3001\u8ef8\u627f\u7279\u5fb5\u3001\u9f52\u8f2a\u5699\u5408\u7b49\u632f\u52d5\u8a0a\u865f\uff0c\u5354\u52a9\u627e\u51fa\u8a2d\u5099\u53ef\u80fd\u5b58\u5728\u7684\u7570\u5e38\u3002<\/p>

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