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压电式加速度传感器，又称振动传感器，是基于压电晶体的压电效应工作的。某些晶体在一定方向上受力变形时，其内部会产生极化现象，同时在它的两个表面上产生符号相反的电荷；当外力去除后，又重新恢复到不带电状态，这种现象称为“压电效应”，具有“压电效应”的晶体称为压电晶体。常用的压电晶体有石英、压电陶瓷等，在现代生产生活中被应用于许许多多的方面，如手提电脑的硬盘抗摔保护，目前用的数码相机和摄像机里，也有加速度传感器，用来检测拍摄时候的手部的振动，并根据这些振动，自动调节相机的聚焦。压电加速度传感器还应用于汽车安全气囊、防抱死系统、牵引控制系统等安全性能方面。
美国Dytran的3220C1是一款高温型加速度传感器/振动传感器，具有体积小、结构坚固，高密封、耐高温等特点，钛合金金属外壳，最大工作温度高达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. Ø.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
应用
1. Environmental Stress Screening (ESS)
环境应力筛选
2. Vibration control
振动控制
3. General purpose high temperature vibration monitoring
高温振动监测
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
订货型号
3220C 高温型
3220C1 高温型
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. 电缆线：6025A, 6056A
