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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3224A1是一款小型IEPE加速度傳感器/振動傳感器，可在溫度高達149攝氏度環境下正常工作，重量僅為0.2g。
The Dytran 3224A1 is an ultra miniature teardrop IEPE accelerometer with integral electronics, designed to adhesively mount in spaces inaccessible to other types of accelerometers and an overall weight of just 0.2 grams. Model 3224A1 is capable of reliable operation in temperatures up to +300°F (+149°C).
Available with a 10 mV/g sensitivity, the model 3224A1 features a ceramic shear sensing element in a lightweight laser welded titanium housing, with a 3-foot (0.9-meter) integral cable terminating to a 10-32 jack. The cable is designed to mate with several Dytran extension cables.
特性
1. 10 mV/g sensitivity
2. 500g range
3. 0.3 to 20,000 Hz (±5%)
4. 3-foot (0.9-meter) integral cable
5. Adhesive mount
6. 0.2 grams
7. Titanium
8. +300°F (+149°C) operation
9. Ultra miniature teardrop design
10. IEPE
應用
1. Environmental Stress Screening (ESS)
環境應力篩選
2. Mechanical shock
機械沖擊測量
3. PC board vibration measurements
印刷電路板振動檢測
4. Product response testing
產品響應試驗
5. General purpose vibration measurements where space is at a premium
受限空間內的通用型振動測量
Weight, Less Cable 0.007 oz 0.2 grams
Case Material Titanium Titanium
Sensitivity 9 to 1.4 mV/ m/s2 Range F.S. For ± 5 Volts Output ± 500 g ± 4905 m/s2
Frequency Response, ±10% 0.3 to 20000 Hz 0.3 to 20000 Hz
Resonant Frequency, NOM >95 kHz >95 kHz
Equivalent Electrical Noise Floor 0.023 g rms 0.225 m/s2 rms
Amplitude Non-Linearity ± 1% %F.S
Transverse Sensitivity, Max. 5% 5%
Strain Sensitivity @250με 0.14 g/με 1.37 m/s2/με
ENVIRONMENTAL
Maximum Vibration 900 grms 8820 m/s2 rms
Maximum Shock 3000 ±gpk 29400 ± m/s2 pk
Temperature Range -60 to +300 °F -51 to 149 °C
Seal Laser welded, Epoxy Sealed Cable Laser welded, Epoxy Sealed Cable
Magnetic Sensitivity at 100 Gauss 0.000009 g/Gauss 0.8829 m/s2/T
ELECTRICAL
Supply Current [6] 2 to 20 mA 2 to 20 mA
Compliance Voltage Range 18 to +30 V 18 to +30 V
Output Impedance TYP 100 Ω 100 Ω
Bias Voltage +8 to +10 VDC +8 to +10 VDC
Discharge Time Constant 0.9 to 1.5 sec 0.9 to 1.5 sec
訂貨型號
3224A2 超小型
3224A3 超小型
3224A4 超小型
3224A5 超小型
3224A6 超小型
3224B 超小型
配件
1. Model 6298 Petro mounting wax, (1) model 6725A installation/removal wrench
2. Model 4110C current source power unit, model 6273 petro mounting wax
3. 電纜線：6011A
相關型號
3224C 高溫型
3