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(xiàn)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(tài)，這種現(xiàn)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(xiàn)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(shù)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(jù)這些振動，自動調節(jié)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(tǒng)、牽引控制系統(tǒng)等安全性能方面。
美國Dytran的3220C1是一款高溫型加速度傳感器/振動傳感器，具有體積小、結構堅固，高密封、耐高溫等特點，鈦合金金屬外殼，工作溫度高達260℃。
The Dytran model 3220C1 is a low profile piezoelectric charge mode accelerometer with lightweight titanium construction. The distinguishing feature of the model 3220C1 is its unique miniature thru hole mounting configuration, which allows the sensor to be turned a full 360° prior to securing. Electrical connection for the model 3220C1 is achieved via a coaxial glass-to-metal sealed 5-44 connector.
The model 3220C1 is offered with a sensitivity of 10 pC/g and features a ceramic sensing element operating in shear mode. Units also have a low overall weight of just 4.0 grams, making them ideal for applications where mass loading is a concern. Units are hermetically sealed to avoid contamination in high humidity and dirty environments and base isolated to avoid EMI/ground loop interference.
特性
1. 10 pC/g sensitivity
2. 10,000 Hz upper frequency range (±5%)
3. 5-44 radial connector
4. ?.09 thru hole mount
4.0 grams
5. Titanium
6. Hermetic
7. Base isolated
8. +500°F (+260°C) operation
9. 360° cable orientation
10. Miniature design
11. Charge mode
應用
1. Environmental Stress Screening (ESS)
環(huán)境應力篩選
2. Vibration control
振動控制
3. General purpose high temperature vibration monitoring
高溫振動監(jiān)測
Weight 0.09 oz 2.7 grams Notes:
Size Diameter x Height 0.41 x 0.25 Inches 10.4 x 6.4 mm
Sensitivity, ±14% [1] 10 pC/g 1.02 pC/m/s2
Frequency Range, ± 10% [4] to 10000 Hz [4] to 10000 Hz
Resonant Frequency >40 kHz >40 kHz
Maximum Transverse sensitivity 5 % 5 %
Capacitance 1,300 pF 1,300 pF
Resistance, Internal 20 GΩ 20 GΩ
Resistance, Housing to Mounting Surface 20 GΩ 20 GΩ
Coefficient of Thermal Sensitivity 0.06 %/°F 0.11 %/°C
Magnetic Sensitivity 0.0002 @ 100 Gauss g/ Gauss 20 @ 0.01 Gauss ms2/T
Thermal Shock Sensitivity 0.16 g/°F 2.8 m/s2/°C
Base Strain 0.006 g/με 0.06 m/s2/με
ENVIRONMENTAL
Maximum Shock 5000 Gpeak 49050 m/s2 peak
Temperature Range -60 to +500 °F -51 to +260 °C
Seal HERMETIC HERMETIC
訂貨型號
3220C 高溫型
3220C1 高溫型
配件
1. Model 6165 mounting screw (2-56)
2. Model 4110C current source power unit, 4705A series in-line charge amplifiers (BNC jack to BNC jack), 4751B series in-line charge amplifier (10-32 jack to 10-32 jack)
3. 電纜線：6025A, 6056A
相關型號
3220E 微型
3220M7 微型
