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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3197C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，最大工作温度高达260℃。
The Dytran 3197C is a high temperature charge mode accelerometer, designed to reliably operate in temperatures up to +500°F (+260°C). Featuring a sensitivity of 2.4 to 4.5 pC/g, and a rugged stainless steel construction, the model 3197C is hermetically sealed for reliable operation in high humidity and dirty environments and case isolated, to avoid EMI/ground loop interference (exact sensitivity is provided on the calibration certificate supplied with each sensor). Units are offered with an industry standard tri-bolt mount and radial TNC connector.
特性
1. 2.4 to 4.5 pC/g sensitivity
2. 2,500 Hz upper frequency range (±5%)
3. TNC radial connector
4. Tri-bolt mount
5. 85 grams
6. Stainless steel
7. Hermetic
8. Case isolated
9. +500° (+260°C) operation
10. Charge mode
应用
1. Engine vibration monitoring
发动机振动监测
2. Transmission vibration monitoring
传动装置振动监测
3. Engine nacelle testing
发动机舱试验
4. High temperature airborne applications
高温机载应用
WEIGHT 85 GRAMS
SIZE , FLANGE X HEIGHT X LENGTH 1.448 FLANGE. DIA x .80 x 2.10 INCHES
MOUNTING PROVISION 3-BOLT PATTERN, 1.188 DIA BOLT CIRCLE
CONNECTOR, COAXIAL, RADIALLY MOUNTED TNC JACK, HERMETIC
CASE /CONNECTOR MATERIAL STAINLESS STEEL, 300 SERIES
PERFORMANCE
SENSITIVITY 2.4 to 4.5 pC/G
RANGE F.S. 500 G's
FREQUENCY RESPONSE, ± 5% [1] to 2500 Hz
MOUNTED RESONANT FREQUENCY >13 kHz
AMPLITUDE NON-LINEARITY (ZERO BASED BEST FIT ST.LINE METHOD) 2.0 % F.S., MAX.
TRANSVERSE SENSITIVITY, MAX. 5 PERCENT
STRAIN SENSITIVITY .012 G's PER MICROSTRAIN @ 250/
ENVIRONMENTAL
MAXIMUM VIBRATION ±1000 G's,
MAXIMUM SHOCK 2000 G's,PEAK
TEMPERATURE RANGE -65 TO +500 oF
THERMAL SENSITIVITY COEFFICIENT .02 %/oF
SEAL WELDED/CERAMIC TO METAL HERMETIC
ELECTRICAL
CAPACITANCE, NOM. 190 pF
OUTPUT SIGNAL POLARITY FOR ACCELERATION TOWARD TOP NEGATIVE GOING
CASE ISOLATION, MIN. 10 MEGOHMS
订货型号
3197C
配件
Model 6535 mounting screws (8-32)
