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IEPE是指一种自带电量放大器或电压放大器的加速度传感器。IEPE是压电集成电路的缩写。因为由加速度传感器产生的电量是很小的，因此传感器产生的电信号很容易受到噪声干扰，需要用灵敏的电子器件对其进行放大和信号调理。IEPE中集成了灵敏的电子器件使其尽量靠近传感器以保证更好的抗噪声性并更容易封装。
美国Dytran的3211A1是一款IEPE加速度传感器/振动传感器，灵敏度10 mV/g，自带10-32接口和#8/M4安装螺纹孔，低噪。
The Dytran 3211A1 is a lightweight IEPE accelerometer, designed for applications where 360° cable orientation and a low profile design are critical.
Available with a 10 mV/g sensitivity, model 3211A1 incorporates a ceramic shear crystal sensing element for high natural frequency, packaged in a rugged titanium housing. Units are case isolated to avoid EMI/ground loop interference.
The model 3211A1 features a 10-32 radial connector and #8 or M4 thread screw mounting capabilities. The miniature thru hole design allows for the sensor to be turned 360° prior to securing for ease of installation. Units incorporate low noise JFET electronics and are hermetically sealed for reliable performance in high humidity and dirty environments.
特性
1. 10 mV/g sensitivity
2. 500g range
3. 1 to 10,000 Hz frequency range (±5%)
4. 10-32 radial connector
5. Ø.17 thru hole mount
6. 10 grams
7. Titanium
8. Hermetically sealed
9. Case isolated
10. 360° cable orientation
11. Low noise JFET electronics
12. IEPE
应用
1. Modal analysis
模态分析
2. Vibration control
振动控制
3. General purpose vibration monitoring
一般用途振动监测
Weight 0.35 oz 10 grams
Sensitivity +/- 5% Range for ± 5 Volts Output ± 500 g pk ± 490 m/s2
Frequency Response, ± 5% 1.0 to 10000 Hz 1.0 to 10000 Hz
Resonant Frequency > 31 kHz > 31 kHz
Equivalent Electrical Noise Floor, 1Hz to 10kHz 0.005 g rms 0.049 m/s2 rms
Linearity [2] ± 1% %F.S ± 1% %F.S
Maximum Transverse Sensitivity 5% 5%
Strain Sensitivity @250με 0.04 g/με 0.39 m/s2με
ENVIROMENTAL
Maximum Vibration 500 ±gpk 4905 ± m/s2 pk
Maximum Shock 5000 ±gpk 49050 ± m/s2 pk
Temperature Range -67 to +250 °F -51 to +121 °C
Seal Hermetic Hermetic
Coefficient Of Thermal Sensitivity 0.06 %/°F 0.108 %/°C
Magnetic Sensitivity @ 100 Gauss (0,01 Tesla) 0.004 g/Gauss 392.40 m/s2 /T
ELECTRICAL
Supply Current 2 to 20 mA 2 to 20 mA
Compliance Voltage Range 18 to 30 V 18 to 30 V
Output Impedence, Typ 120 Ω 120 Ω
Bias Voltage +11 to +13 VDC +11 to +13 VDC
Discharge Time Constant 0.8 to 2.0 sec 0.8 to 2.0 sec
Electrical Isolation [3] 10 GΩ 10 GΩ
订货型号
3211A1
3211A2
3211M11 (潜水型，特殊加工定制版)
配件
1. Model 6595 mounting screw (8-32)
2. Model 4110C current source power unit
3. 电缆：6010A, 6011A, 6012A, 6016A, 6018A, 6022A, 6026A, 6032A, 6033A, 6049A, 6050A, 6051A, 6053A, 6054A, 6066A, 6069A, 6093A, 6099A, 6400A, 6401A, 6412A, 6429A, 6924A, 6930A, 6991A
