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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3192A是一款IEPE加速度传感器/振动传感器，灵敏度1V/g，频响低至0.5Hz。
The Dytran 3192A is a rugged IEPE piezoelectric accelerometer with a sensitivity of 1 V/g, a built-in Faraday shield for electrostatic noise immunity, excellent low frequency response of 0.5 Hz and the capability to resolve vibrations as low as 0.00007 g's RMS.
Design of the model 3192A incorporates an annular shear ceramic sensing element, packaged in a stainless steel housing with a 2-pin MIL-C-5015 axial connector and 1/4-28 mounting hole. The sensor is hermetically sealed for reliable operation in high humidity and dirty environments and case isolated to avoid EMI/ground loop interference.
特性
1. 1,000 mV/g sensitivity
2. 5g range
3. 0.5 to 1,000 Hz frequency range (±5%)
4. 2-pin axial connector
5. 1/4-28 tapped hole
6. 190 grams
7. Stainless steel
8. Hermetic
9. Case isolated
10. Internal Faraday shield
11. Low frequency response
12. IEPE
应用
1. Bridge monitoring
桥梁监测
2. Low frequency vibration measurements
低频振动测量
3. Modal analysis of large structures
模态分析
4. Seismic monitoring
地震监测
Weight 6.65 oz 190.0 grams
Size Hex x Height 1.125 x 2.25 Inches 28.57 x 57.15 mm IC charge amplifier
Connector Type 10SL-4P 10SL-4P
Mounting Provision : Tapped Hole 1/4-28 x .250 deep 1/4-28 x .250 deep
Material : Base, Cap and Connector 304L 304L
Element Style Material Ceramic Ceramic
Type Planar Shear Planar Shear
Sensitivity, ±5% [1] 1 V/g 0.10 V/m/s2
Range F.S for ± 5 Volts Output ±5 g's ±49 m/s2
Frequency Range, ±5% 0.5 to 1000 Hz 0.5 to 1000 Hz
Resonant Frequency, Nominal 12 kHz 12 kHz
Equivalent Electrical Noise Floor 0.000036 grms 0.00035 m/s2 rms
Spectral Noise 1Hz 4.0 μgrms/√(Hz) 39.24 μm/s2 rms/√(Hz)
10Hz 8.1 μgrms/√(Hz) 79.46 μm/s2 rms/√(Hz)
100Hz 0.5 μgrms/√(Hz) 4.91 μm/s2 rms/√(Hz)
1000Hz 0.36 μgrms/√(Hz) 3.53 μm/s2 rms/√(Hz)
Linearity [3] ± 2% % F.S. ± 2% % F.S.
Maximum Transverse sensitivity 5 % 5 %
Strain Sensitivity 0.005 g/με 0.05 m/s2/με
ENVIRONMENTAL
Maximum Vibration ±50 gpeak ±490 m/s2 peak
Maximum Shock ±100 gpeak ±981 m/s2 peak
Temperature Range -60 to+250 °F -51 to121 °C
Seal, Hermetic Glass-to-metal/Welded Glass-to-metal/Welded
ELECTRICAL
Supply Current Range [4] 2 to 20 mA 2 to 20 mA
Compliance Voltage Range + 18 to +30 Volts +18 to +30 Volts
Output Impedence,Typ 100 Ω 100 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
Output Signal Polarity for Acceleration Towards Top Positive Positive
Electrical Isolation, Case Ground To Mounting Surface 10 GΩ, min 10 GΩ, min
订货型号
3192A
配件
1. Model 6176 mounting stud (1/4-28 to 1/4-28)
2. Model 4110C current source power unit, model 6186 adhesive mounting base, model 6187 magnetic mounting base, model 6190 magnetic mounting base, model 6194 protective boot
3. 电缆线：6038A, 6080A, 6082A, 6406A, 6407A, 6459A
