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振動加速度計算器 (ISO 20816)
將振動速度 (mm/s RMS) 轉換為任意頻率下的加速度 (m/s², g)。輸入速度和頻率以獲取加速度 RMS、峰值和位移結果。
結果
由速度計算加速度
對於正弦振動，加速度是通過速度乘以角頻率導出的：
轉換為 g
由速度計算位移
適用對象：
- vRMS — 振動速度 RMS (mm/s)
- f — 頻率 (Hz)；若給定 RPM：f = RPM / 60
- RMS — 加速度均方根 (m/s²)
- 峰值 — 加速度峰值 =RMS × √2 (m/s²)
- dpp — 位移峰峰值 (μm)
實務範例
RMS = 4.5 × 2π × 25 / 1000 = 0.707 m/s²
峰值 = 0.707 × √2 = 1.000 m/s²
g,RMS = 0.707 / 9.80665 = 0.072 g
dpp = 4.5 × √2 × 1000 / (π × 25) = 81.0 μm
振動參數比較
| 參數 | 最佳頻率範圍 | 典型單位 | 主要用途 |
|---|---|---|---|
| 位移 | < 10 Hz (600 RPM) | μm p-p | 低速機組、軸振動 |
| 速度 | 10–1000 Hz | mm/s RMS | 一般機組狀態 (ISO 10816) |
| 加速度 | > 1000 Hz | m/s², g | 軸承缺陷、齒輪嚙合、高頻 |
Vibration acceleration is the rate of change of vibration velocity, measured in m/s² or g (where 1 g = 9.80665 m/s²). It is the most sensitive parameter to high-frequency vibration and is critical for detecting bearing defects, gear mesh faults, and other high-frequency mechanical problems.
Acceleration increases with both vibration amplitude and frequency, making it the parameter of choice for frequencies above 1000 Hz.
Acceleration is preferred for high-frequency vibration analysis, typically above 1000 Hz. It is the best parameter for early detection of rolling element bearing defects, gear mesh problems, and cavitation.
Velocity (mm/s RMS) remains better for general machine condition assessment in the 10–1000 Hz range per ISO 10816 / ISO 20816. Many modern monitoring systems use acceleration enveloping (demodulation) for bearing diagnostics.
To convert from g to m/s², multiply by 9.80665 (the standard acceleration due to gravity). For example, 0.5 g = 0.5 × 9.80665 = 4.903 m/s².
Conversely, to convert from m/s² to g, divide by 9.80665. The g unit is popular in vibration analysis because typical industrial vibration levels fall in a convenient numeric range — roughly 0.01 to 50 g.
Piezoelectric accelerometers are the standard sensors for vibration acceleration measurement. IEPE (ICP) type accelerometers with integrated electronics are most common in industrial applications, offering wide frequency range (0.5 Hz to 20+ kHz), high sensitivity, and excellent durability.
MEMS accelerometers provide lower-cost alternatives for monitoring systems. Charge-mode piezoelectric accelerometers are used in high-temperature environments above 120 °C.
Typical vibration acceleration levels depend on machine type, speed, and frequency. For general industrial machinery at operating speed:
- < 0.5 g — Good condition
- 0.5–2 g — Acceptable
- 2–5 g — Alarm level
- > 5 g — Investigate immediately
High-frequency bearing defect signals can reach 10–50 g peak. ISO 20816 primarily defines zone boundaries using velocity, but acceleration is essential for high-frequency diagnostics.
本頁所述的操作流程由 Vibromera 團隊使用 Balanset-1A（一款用於現場轉子平衡的便攜式雙通道動平衡儀及振動分析儀）開發並經過實地測試。
專業現場動平衡儀器，內建振動分析、加速度量測及 ISO 10816 / ISO 20816 評估功能。已應用於 50 多個國家。
Nikolai Shelkovenko
Nikolai Shelkovenko是一名振動分析工程師，也是Vibromera的創辦人兼執行長。 15年多來，他一直在現場——而非在試驗台上——為旋轉設備進行動平衡校正：粉碎機、工業風機、破碎機、離心機、軸與主軸。正是這些實際工作催生了Balanset系列儀器——它們被設計為一種專業人員可以隨身攜帶到機器旁、在現場獨立使用的工具，而非實驗室設備。 Vibromera成立於2017年，自2023年起總部設於葡萄牙波爾圖。Balanset系列產品的研發、組裝與支援均在此完成。旗艦產品是Balanset-1A，一款用於單平面及雙平面動平衡校正與振動診斷的可攜式分析儀。 Nikolai親自參與客戶支援工作，處理各種棘手的動平衡校正案例，並參與軟體開發。他以任何語言為全球客戶提供服務。
