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壓電式加速度傳感器，又稱振動傳感器，是基于壓電晶體的壓電效應工作的。某些晶體在一定方向上受力變形時，其內部會產生極化現象，同時在它的兩個表面上產生符號相反的電荷；當外力去除后，又重新恢復到不帶電狀態，這種現象稱為“壓電效應"，具有“壓電效應"的晶體稱為壓電晶體。常用的壓電晶體有石英、壓電陶瓷等，在現代生產生活中被應用于許許多多的方面，如手提電腦的硬盤抗摔保護，目前用的數碼相機和攝像機里，也有加速度傳感器，用來檢測拍攝時候的手部的振動，并根據這些振動，自動調節相機的聚焦。壓電加速度傳感器還應用于汽車安全氣囊、防抱死系統、牽引控制系統等安全性能方面。
美國Dytran的3309A是一款高溫型加速度傳感器/振動傳感器，具有體積小、結構堅固，高密封、耐高溫等特點，高頻率，工作溫度高達250℃。
The Dytran 3309A is a ring style high temperature piezoelectric charge mode accelerometer offering a high natural frequency and reliable operation in temperatures up to +482°F (+250°C).
Incorporating a unique single crystal piezoelectric sensing element operating in shear mode, the Dytran model 3309A is offered with a sensitivity of 5 pC/g. Units feature a radial 3-pin “Mighty Mouse™" connector, as well as a miniature thru hole design, allowing the sensor to be turned 360° prior to securing, aiding the user during sensor installation. The model 3309A is also hermetically sealed for use in demanding environments, and case isolated to avoid EMI/ground loop interference.
特性
1. 5 pC/g sensitivity
2. 5,000 Hz upper frequency range (±5%)
3. 3-pin "Mighty Mouse™" radial connector
4. ?.17 thru hole mount
5. 25.5 grams
6. Stainless steel
7. Hermetic
8. Case isolated
9. 360° cable orientation
10. +482°F (+250°C) operation
11. Charge mode
應用
1. Commercial and military aircraft vibration monitoring
商用和飛機振動監測
2. Engine vibration monitoring
發動機振動監測
3. High performance engine analysis
高性能引擎分析
Weight 0.893 oz 25.5 grams
Mounting Provision ?.16 Thru Hole ?4.1 Thru Hole
Material 304L 304L
Sensitivity +/- 5%
Frequency Range, ± 3dB [2] - 15,000 [2] - 15,000
Frequency Range, ± 10% [2]-10,000 [2]-10,000 -60 -5
Frequency Range, ± 5% [2]-5,000 Hz
Linearity [3] ± 1 %F.S ± 1 %F.S 150 2.5
Transverse Sensitivity, Max. 5% 5% 300 5
Maximum Vibration 5,000 ±gpk 49000 ± m/s2 pk
Maximum Shock 10,000 ±gpk 98000 ± m/s2 pk
Temperature Range (Operational) ‐60 to +482 °F ‐55 to +250 °C
Coefficient Of Thermal Sensitivity 0.016 %/°F 0.032 %/°C
Base Strain Sensitivity 0.008 g/με 0.0784 m/s2 / με
Base Isolation (1000VDC, 1 minute, 20 sec. ramp)[4] >1 GΩ >10 GΩ
Capacitance, NOM at 75°F 280 pF 280 pF
Insulation Resistance, (across element) 75°F 1.00E+15 Ω 1.00E+15 Ω
訂貨型號
3309A
配件
Model 6238A2 mounting screw (8-32)
相關型號
3310A
3316C
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