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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3443C是一款高温型三轴加速度传感器/振动传感器，具有体积小、结构坚固，高密封、耐高温等特点，高频率，最大工作温度高达260℃，适用于发动机振动研究和振动监测。
The Dytran 3443C is a triaxial, charge mode vibration monitoring accelerometer, designed to reliably operate in temperatures up to +500°F (+260°C).
Ideal for use in a variety of vibration monitoring applications including engine vibration studies, exhaust system analysis and industrial vibration monitoring, Dytran’s model 3443C high temperature accelerometer is capable of operating under extreme temperatures, while at the same time providing the high levels of reliability, durability and accuracy that is offered with standard laboratory sensors. Weighing just 10 grams, the Dytran model 3443C features ceramic shear sensing elements mounted in a hermetically sealed, lightweight titanium housing. Units utilize (2) thru holes for mounting and (3) 10-32 radial connectors.
特性
1. 2.7 pC/g sensitivity
2. 10,000 Hz upper frequency range (±10%)
3. (3) 10-32 radial connectors
4. (2) Ø.15 thru hole mount
5. 10 grams
6. Titanium
7. Hermetic
8. +500°F (+260°C) operation
9. Charge mode
应用
1. Engine vibration studies
发动机振动研究
2. Exhaust system analysis
排气系统研究
3. Industrial vibration monitoring
工业振动监测
4. General purpose high temperature triaxial vibration monitoring
高温三轴振动监测
Weight, Max 0.35 oz 10.0 grams.
Connector Type 3 X 10-32 Coaxial 3 X 10-32 Coaxial
Mounting Provision : Thru Hole 2 X Ø.150 2 X Ø 3.7 mm
Sensitivity [1], ± 30% 2.7 pC/g 0.28 pC/m/s2 0.1
Measurement Range ±1800 g pk ±17658 m/s2 pk 2
Frequency Range [t 10000 H [t 10000 H 6
Range, ±10% 3] to Hz 3] to Hz SEC
Resonant Frequency > 25 kHz > 25 kHz 10
Capacitance per Axis, Nom 490 pF 490 pF
Linearity [2] ± 1% % F.S. ± 1% % F.S.
Maximum Transverse sensitivity 6 % 6 %
Insulation resistance, (Connector pin to case) at 70F >1012 Ω at 21C >1012 Ω
at 500°F >108 Ω at 260°C > 108 Ω
ENVIRONMENTAL
Maximum Vibration ±3000 g pk ±29430 m/s2, pk
Maximum Shock ±5000 g pk ±49050 m/s2, pk
Temperature Range -94 to+500 °F -70 to+260 °C
订货型号
3443C
配件
1. Model 6247A1 mounting screws (6-32)
2. Model 6771 isolated mounting base
3. 电缆：6013A, 6019A
