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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3274A1是一款超小型IEPE加速度傳感器/振動傳感器，IEEE1451.2是智能傳感器接口模塊標準。它提供了將傳感器和變送器連接到網絡的接口標準，主要用于實現傳感器的網絡化。IEEE1451.2標準采用通用的A/D或D/A轉換裝置作為傳感器的I/O接口，將各種傳感器模擬量轉換成標準規定格式的數據，連同一個小存儲器—傳感器電子數據表TEDS（Transducer Electronic Data Sheet），與標準規定的處理器目標模型—網絡適配器NCAP（Network Capable Application Process）連接。如此，數據可以按網絡規定的協議接入網絡。該標準結構模型提供了一個連接智能變送器的接口模型STIM（Smart Transducer Interface Module）NCAP的10線標準接口—變送獨立接口TII（Transducer Independence Interface）。
The Dytran 3274A1 is an ultra miniature high frequency IEPE accelerometer with IEEE 1451.4 TEDS capabilities.
Units have an overall height of just 0.24-inches (6.1-millimeters), weigh just 2 grams, and are ideal for the measurement of shock and vibration of very small, lightweight objects such as printed circuit boards and board mounted components.
Offered with a sensitivity of 5 mV/g, the model 3274A1 features a quartz shear sensing element, packaged in a lightweight, teardrop titanium housing. Designed for adhesive mount, the Dytran model 3274A1 has an upper frequency response of 10,000 Hz. Due to their low mass and high crystal stiffness, units have a resonant frequency of >40 kHz, allowing them to be used to measure high frequency vibration with very little error.
The model 3274A1 utilizes a specially designed 3-56 coaxial connector, mating with a 3-foot (0.9-meter) replaceable coaxial cable and terminating to a 10-32 jack. Units are hermetically sealed for reliable operation in high humidity environments, as well as case isolated to avoid EMI/ground loop interference.
特性
1. 5 mV/g sensitivity
2. 1,000g range
to 10,000 Hz (±10%)
3. 3-foot (0.9-meter) removable cable
4. Adhesive mount
1 grams
5. Titanium
6. Hermetic
7. Case isolated
8. Ultra miniature teardrop design
9. IEEE 1451.4 TEDS capabilities
10. IEPE
應用
2 Environmental Stress Screening (ESS)
環境應力篩選
3 Modal analysis
模態分析
4 Product response testing
產品響應試驗
5 High frequency vibration applications
高頻振動應用
Weight, Max (Less Cable) 0.07 oz 2 grams [
Connector Radially Mounted 3-56 3-56
Cable Length 36 Inches 914 mm
Case Material Titanium Titanium
Sensitivity, ± 10% [3] 5 mV/g 0.51 mV/m/s2
Range F.S For ± 5 Volts Out ± 1000 g's ± 9810 m/s2
Frequency Response, +/- 10% 1.1 to 10000 Hz 1.1 to 10000 Hz
Mounted Resonant Frequency > 40 kHz > 40 kHz
Amplitude Non-Linearity [4] 2 %F.S 2 %F.S
Transverse Sensitivity, Max 5 % 5 %
y, Noise Resolution 0.014 grms 0.14 m/s2 rms
Strain Sensitivity @250/με 0.04 g/με 0.39 m/s2/με
ENVIRONMENTAL
Maximum Vibration 2000 Grms 19600 m/s2 rms
Maximum Shock 5000 Gpeak 49000 m/s2 peak
Temperature Range -60 to +250 °F -51 to +121 °C
Environmental Seal Hermetic Hermetic
ELECTRICAL
Supply Current/Compliance Voltage Range [5] 2 to 20/+18 to +30 mA/Volts 2 to 20/+18 to +30 mA/Volts
Output Impedance, TYP 100 Ω 100 Ω
Bias Voltage +7 to + 9 VDC +7 to + 9 VDC
Discharge Time Constant 0.3 to 0.8 Sec 0.3 to 0.8 Sec
Teds Feature IEEE 14514 IEEE 14514
Case Isolation 10 GΩ 10 GΩ
訂貨型號
3274A1 超小型
3274A2 超小型
3274A3 超小型
配件
1. Model 6003A03 cable assembly (3-56 to 10-32), (1) model 6298 petro mounting wax, (1) model 6591A installation/removal wrench
2. Model 4110C current source power unit, model 6273 petro mounting wax
3. 電纜：6011A
相關型號
3030B4
3220E
3305A1
3