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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3211M1是一款IEPE加速度传感器/振动传感器，自带10集成电缆线，可在水下175psi环境下正常工作。
The Dytran 3211M1 is a low profile IEPE accelerometer with a 10 mV/g sensitivity, weighing just 10 grams. The sensor features a factory molded urethane boot and a 10-foot integral urethane cable, for reliable operation in water depths to 175 psi.
Sensor design incorporates a ceramic shear sensing element for high natural frequency and integral low noise JFET electronics, encased within a rugged, lightweight titanium housing. The sensor is base isolated to avoid EMI/ground loop interference and mounts via #8 or M4 mounting screws.
Units are hermetically sealed for reliable operation in high humidity and dirty environments. A miniature thru hole design allows the sensor to be turned 360° prior to securing for ease of sensor installation.
特性
1. 10 mV/g sensitivity
2. 500g range
3. 1 to 10,000 Hz frequency range (±5%)
4. 10-foot integral cable
5. Ø.17 thru hole mount for #8 or M4 screw
6. 10 grams
7. Titanium
8. Hermetic
9. Base isolated
10. Low profile
11. 360° cable orientation
12. Submersible to 175 psi
13. IEPE
应用
1. Underwater vibration measurements
水下振动测量
2. Vibration testing in submersible environments
潜水环境下振动试验
Weight grams 9.6
Size Diameter inch 0.6
Height inch 0.42
Mounting Thru hole accommodates standard 8-32 or M4 bolt
Connector Type coaxial
Thread 10-32
Housing Material titanium alloy
Isolation case connected to signal ground and
isolated from mounting surface by
integral isolation washers
Sensing Element Material ceramic
Mode shear
PERFORMANCE
Sensitivity at 4mA mV/g 9.5 10 10.5
Measurement Range ±gpk 500
Frequency Range ±5% Hz 1 10000
PERFORMANCE SPECIFICATION
ACCELEROMETER, SINGLE AXIS
IEPE
Frequency Range, ±5% Hz 1 10000
Resonance Frequency kHz >31
Equivalent Noise 1Hz to 10kHz g rms 0.0005
Sensitivity vs Current 2mA to 10mA % 1
Transverse Sensitivity % 5
Polarity see outline drawing positive
ENVIRONMENTAL
Shock g pk 5000
Operating Temperature °F -67 250
Seal hermetic
Coefficient of Thermal Sensitivity %/°F 0.06
Magnetic Sensitivity at 100 Gauss g/Gauss 0.004
Thermal Shock Sensitivity g/°F 0.02
Base Strain Sensitivity g/µε 0.04
Stray Voltage Sensitivity 10V applied to equiv. g 0.004
mounting surface
ELECTRICAL
Supply Current mA 2 20
Compliance Voltage Vdc 18 30
Output Bias Room Temp Vdc 11 13.5
Operating Temp Vdc 8 16
Output Impedance Ω 120
Discharge Time Constant sec 0.5
Warmup Time sec 2
订货型号
3211M1
配件
Recommended Accessories: model 4110C current source power unit
