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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3085C是一款高温型加速度传感器/振动传感器，灵敏度输出10 pC/g，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316摄氏度。
The Dytran 3085C is a single axis high temperature differential output accelerometer with 10 pC/g sensitivity, designed to measure surface vibration at temperatures up to +600°F (+316°C). This piezoelectric charge mode accelerometer features a case isolated design with a hermetically sealed stainless steel housing and incorporates a ceramic crystal operating in compression mode.
Model 3085C offers an industry standard tri-bolt mounting flange and a transverse mounted glass-to-metal sealed 2-pin electrical connector.
特性
1. 10 pC/g sensitivity
2. 2,500 Hz upper frequency range (±5%)
3. 2-pin radial connector
4. Tri-bolt mount
5. 75 grams
6. Stainless steel
7. Hermetic
8. Case isolated
9. +600°F (+316°C) operation
10. Differential output
11. Charge mode
应用
1. Turbine vibration measurements
涡轮机振动测量
2. General purpose vibration monitoring in high temperature and harsh environments
高温和恶劣环境下的振动监控
WEIGHT 75 grams
SIZE , FLANGE X HEIGHT X LENGTH 1.448 FLANGE. DIA x .80 x 2.10 inch
MOUNTING PROVISION 3-BOLT PATTERN, 1.188 DIA BOLT CIRCLE
CONNECTOR, SIDE MOUNTED 2-PIN, 7/16-27 UNS-2A SHELL
CASE /CONNECTOR MATERIAL 304L
PERFORMANCE
SENSITIVITY, ± 2.0 (NOM) 10 pC/g
RANGE F.S. 500 g's
FREQUENCY RESPONSE, +/- 5% [1] to 2500 Hz
MOUNTED RESONANT FREQUENCY, NOM. 13 kHz
AMPLITUDE NON-LINEARITY (ZERO BASED BEST FIT ST.LINE METHOD) 2.0 % F.S., MAX.
TRANSVERSE SENSITIVITY, MAX. 5 %
STRAIN SENSITIVITY @ 250/με .012 g/με
ENVIRONMENTAL
MAXIMUM VIBRATION ±1000 g,
MAXIMUM SHOCK 2000 g pk
TEMPERATURE RANGE -65 TO +600 °F
THERMAL SENSITIVITY COEFFICIENT <.005 %/°F
SEAL WELDED/CERAMIC TO METAL
HERMETIC
ELECTRICAL
CAPACITANCE, ±20%. PIN A-B 380 pF
OUTPUT SIGNAL POLARITY FOR ACCELERATION TOWARD TOP SEE INSTALLATION DRAWING
CAPACITIVE MISMATCH, DIFFERENCE FROM EACH PIN TO HOUSING 2 MAX pF
订货型号
3085C
配件
1. Model 6535 mounting screws (8-32)
2. Compatible Cables: 6838A, 6845A
