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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3049D是一款高温型加速度传感器/振动传感器，专具有体积小，结构坚固，高密封，耐高温等特点，最大工作温度高达177摄氏度，钛合金外壳，灵敏度5.8 pC/g
The Dytran 3049D is a rugged high temperature charge mode accelerometer, designed to reliably operate in temperatures up to +350°F (+177°C). Featuring a lightweight titanium housing and a sensitivity of 5.8 pC/g, the base of the model 3049D is electrically isolated to avoid EMI/ground loop interference. Units are also hermetically sealed for use in demanding environments.
This sensor is part of Dytran's 3049D piezoelectric accelerometer series, which differ only in terms of their mounting configuration. The model 3049D features a 10-32 mounting stud, while its counterpart, the model 3049D1, is offered with adhesive mounting capabilities.
特性
1. 5.8 pC/g sensitivity
2. 8,000 Hz upper frequency range (±5%)
3. 10-32 axial connector
4. 10-32 stud mount
5. 3.2 grams
6. Titanium
7. Hermetic
8. Base isolated
9. +350°F (+177°C) operation
10. Lightweight
11. Charge mode
应用
1. Modal analysis
模态分析
2. Vibration control
振动控制
3. General purpose high temperature vibration monitoring
通用高温振动监测
WEIGHT, MAX. 3049D 4.0 grams
WEIGHT, MAX. 3049D1 3.5 grams
SIZE, HEX X HEIGHT .44 (11mm) X .57 inches
MOUNTING, 3049D 10-32 integral stud
MOUNTING, 3049D1 adhesive mount
CONNECTOR, TOP MOUNTED 10-32 coaxial
MATERIAL, HOUSING AND CONNECTOR Titanium alloy
PERFORMANCE
SENSITIVITY, ± 15% [1] 5.0 pC/g
FREQUENCY RANGE, ± 5% to 8k Hz
RESONANT FREQUENCY >40 kHz
LINEARITY [2] ± 1% % F.S.
TRANSVERSE SENSITIVITY, MAX. 5 %
STRAIN SENSITIVITY .03 g/ε @250ε
ENVIRONMENTAL
MAXIMUM VIBRATION/SHOCK 1000/2000 ±g pk
TEMPERATURE RANGE -100 to +350 °F
SEAL, HERMETIC glass-to-metal and TIG welded
COEFFICIENT OF THERMAL SENSITIVITY .06 %/°F
ELECTRICAL
CAPACITANCE, NOM. 1500 pF
OUTPUT SIGNAL POLARITY FOR ACCELERATION TOWARD TOP positive
CASE GROUNDING signal ground is isolated from mounting surface
订货型号
3049D
3049D1
配件
1. 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)
2. 电缆线：6002A, 6013A, 6019A, 6036A, 6037A, 6049A, 6057A, 6097A, 6411A, 6417A, 6419A, 6924A, 6991A
