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压电式加速度传感器，又称振动传感器，是基于压电晶体的压电效应工作的。某些晶体在一定方向上受力变形时，其内部会产生极化现象，同时在它的两个表面上产生符号相反的电荷；当外力去除后，又重新恢复到不带电状态，这种现象称为“压电效应”，具有“压电效应”的晶体称为压电晶体。常用的压电晶体有石英、压电陶瓷等，在现代生产生活中被应用于许许多多的方面，如手提电脑的硬盘抗摔保护，目前用的数码相机和摄像机里，也有加速度传感器，用来检测拍摄时候的手部的振动，并根据这些振动，自动调节相机的聚焦。压电加速度传感器还应用于汽车安全气囊、防抱死系统、牵引控制系统等安全性能方面。
美国Dytran的3224A1是一款小型IEPE加速度传感器/振动传感器，可在温度高达149摄氏度环境下正常工作，重量仅为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
应用
1. Environmental Stress Screening (ESS)
环境应力筛选
2. Mechanical shock
机械冲击测量
3. PC board vibration measurements
印刷电路板振动检测
4. Product response testing
产品响应试验
5. General purpose vibration measurements where space is at a premium
受限空间内的通用型振动测量
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
订货型号
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. 电缆线：6011A
相关型号
3224C 高温型
