壓電式加速度傳感器，又稱振動傳感器，是基于壓電晶體的壓電效應工作的。某些晶體在一定方向上受力變形時，其內(nèi)部會產(chǎn)生極化現(xiàn)象，同時在它的兩個表面上產(chǎn)生符號相反的電荷；當外力去除后，又重新恢復到不帶電狀態(tài)，這種現(xiàn)象稱為“壓電效應”，具有“壓電效應”的晶體稱為壓電晶體。常用的壓電晶體有石英、壓電陶瓷等，在現(xiàn)代生產(chǎn)生活中被應用于許許多多的方面，如手提電腦的硬盤抗摔保護，目前用的數(shù)碼相機和攝像機里，也有加速度傳感器，用來檢測拍攝時候的手部的振動，并根據(jù)這些振動，自動調(diào)節(jié)相機的聚焦。壓電加速度傳感器還應用于汽車安全氣囊、防抱死系統(tǒng)、牽引控制系統(tǒng)等安全性能方面。
美國Dytran的3055C是一款高溫型單軸加速度傳感器/振動傳感器，專為高溫環(huán)境振動監(jiān)測應用而設計，具有體積小，結構堅固，高密封，耐高溫等特點，工作溫度高達190攝氏度。
The Dytran 3055C 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).
Offered with a sensitivity of 15 pC/g, the model 3055C features a lightweight, robust, hermetically sealed titanium housing with a 10-32 radial connector and 10-32 mounting hole, allowing units to be utilized in a variety of application environments. The Dytran model 3055C weighs just 10 grams and is base isolated to avoid EMI/ground loop interference.
特性
1. 15 pC/g sensitivity
2. 5,000 Hz upper frequency range (±5%)
3. 10-32 radial connector
4. 10-32 tapped hole
5. 10 grams
6. Titanium
7. Hermetic
8. Base isolated
9. +375°F (+190°C) operation
10. Lightweight
11. Charge mode
應用
1. Modal and structural analysis
模態(tài)和結構分析
2. Vibration control
振動控制
3. General purpose high temperature vibration monitoring
通用高溫振動監(jiān)測
Weight 0.35 oz 10.0 grams
Sensitivity, ± 15% [2] 15 pC/g 1.53 pC/m/s2
Frequency Range [5] 5000 Hz
Resonance Frequency 32 kHz 32 kHz Time Constants
Linearity [4] ±1 % ±1 %
Transverse Sensitivity Max 5 % 5 % -100 -4
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
Electrical Isolation 10 GΩ, min 10 GΩ, min
訂貨型號
3055C
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)
3. 電纜：6002A, 6013A, 6019A, 6036A, 6037A, 6049A, 6057A, 6097A, 6411A, 6417A, 6419A, 6924A, 6991A
相關型號
3055D1 (通用型)
3055D2 (通用型)
3055D3 (通用型)
3055D4 (通用型)
3055D5 (通用型)
3055D6 (通用型)
3055D1T (通用型TEDS)
3055D2T (通用型TEDS)
3055D3T (通用型TEDS)
3055D4T (通用型TEDS)
3055D5T (通用型TEDS)
3055D6T (通用型TEDS)
