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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3122C是一款高温型加速度传感器/振动传感器，集成陶瓷应变片，具有高密封，结构坚固和耐高温特点，最大工作温度高达191摄氏度。
The Dytran 3122C is a piezoelectric charge mode accelerometer with sensitivity of 50 pC/g, designed to offer reliable performance in temperatures up to +375°F (+191°C).
The model 3122C features a hermetically sealed, stainless steel design and incorporates a ceramic sensing element operating in compression mode. Weighing 25 grams, the model 3122C utilizes a standard 10-32 radial connector with 10-32 tapped hole.
特性
1. 50 pC/g sensitivity
2. 5,000 Hz upper frequency range (±8%)
3. 10-32 radial connector
4. 10-32 tapped hole
5. 25 grams
6. Stainless steel
7. Hermetic
8. Small size
9. +375°F (+191°C) operation
10. 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
SPECIFICATION VALUE UNITS
RANGE +/- 500 G
MAXIMUM SHOCK 2000 G, PEAK
MAXIMUM VIBRATION 1000 G, RMS
SENSITIVITY, +20%/-10% (3122C) [1] 50 pC/G
(3122C2) [1] 15 pC/G
MOUNTED RESONANT FREQUENCY, NOM. 25 kHz
FREQUENCY RESPONSE, +/- 8% [2] [2] to 5000 Hz
OPERATING TEMPERATURE RANGE (3122C) -60 to +375 F
(3122C2) -60 to +500 F
CAPACITANCE, NOM.(3122C) 3000 pF
(3122C2) 520 pF
AMPLITUDE LINEARITY +/-2 %FS
TRANSVERSE SENSITIVITY 5 %
SIGNAL POLARITY [3] NEGATIVE [2]
SIZE, HEX x HEIGHT 0.5 X 0.96 IN
WEIGHT 25 GM
GROUND RETURN CASE IS SIGNAL RETURN
CONNECTOR, TRANSVERSE MOUNTED COAXIAL 10-32
CASE MATERIAL STAINLESS STEEL 316L
MOUNTING PROVISION TAPPED HOLE IN BASE 10-32
订货型号
3122C
3122C2 高温型
配件
1. Model 6200 mounting stud (10-32 to 10-32)
2. Model 4110C current source power unit, 4705A series in-line charge amplifier (BNC jack to BNC jack), 4751B series in-line charge amplifier (10-32 jack to 10-32), model 6196 magnetic mounting stud (10-32), model 6213 adhesive mounting base (10-32)
3. 电缆线：6002A, 6013A, 6019A, 6036A, 6037A, 6049A, 6057A, 6097A, 6411A, 6417A, 6419A, 6924A, 6991A
