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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3255C是一款单轴压电式加速度传感器，具有大频宽，性价比高和耐高温等特点，灵敏度15pC/g，最高工作温度+190℃。
The Dytran 3255C is a single axis piezoelectric charge mode accelerometer with wide bandwidth, designed to provide cost effective general purpose vibration monitoring in temperatures up to +375°F (+190°C) operation.
Offered with a sensitivity of 15 pC/g, the model 3255C features a lightweight, robust, hermetically sealed titanium housing with a radial 10-32 connector and 10-32 mounting hole, allowing it to be utilized in a variety of application environments.
特性
1. 15 pC/g sensitivity
2. 5,000 Hz upper frequency range (±10%)
3. 10-32 radial connector
4. 10-32 tapped hole
5. 10 grams
6. Titanium
7. Hermetic
8. +375°F (+190°C) operation
9. Charge mode
应用
1. Modal and structural analysis
模态与结构分析
2. Vibration control
振动控制
3. General purpose high temperature vibration monitoring
通用高温振动监测
Weight 0.35 oz 10.0 grams
Mounting Internal Thread 10-32 UNF-2B 10-32 UNF-2B
Sensitivity, ± 15% [2] 15 pC/g 1.53 pC/m/s^2
Acceleration Range [3] [3] Gpeak [3] m/s^2 peak
Resonance Frequency 32 kHz 32 kHz Time Constants
Linearity [4] ±1 % ±1 % -100 -4
Transverse Sensitivity Max 5 % 5 % 0 -1.5
ENVIRONMENTAL 200 2
Shock Max 3000 g pk 29430 m/s^2
Vibration 600 k 5886 / ^2
Max g pk m/s^Operating Temperature -60 to +375 °F -51 to +190 °C
Seal Hermetic Hermetic
Coefficient of Thermal Sensitivity 0.06 %/°F 0.11 %/°C
ELECTRICAL
Capacitance, nom 975 pF 975 pF
订货型号
3255C
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 jack), model 6196 magnetic mounting base (10-32), model 6213 adhesive mounting base (10-32)
3. 电缆：6002A, 6013A, 6019A, 6036A, 6037A, 6049A, 6057A, 6097A, 6411A, 6417A, 6419A, 6924A, 6991A
