壓電式加速度傳感器，又稱振動(dòng)傳感器，是基于壓電晶體的壓電效應(yīng)工作的。某些晶體在一定方向上受力變形時(shí)，其內(nèi)部會(huì)產(chǎn)生極化現(xiàn)象，同時(shí)在它的兩個(gè)表面上產(chǎn)生符號(hào)相反的電荷；當(dāng)外力去除后，又重新恢復(fù)到不帶電狀態(tài)，這種現(xiàn)象稱為“壓電效應(yīng)”，具有“壓電效應(yīng)”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(yīng)用于許許多多的方面，如手提電腦的硬盤抗摔保護(hù)，目前用的數(shù)碼相機(jī)和攝像機(jī)里，也有加速度傳感器，用來檢測拍攝時(shí)候的手部的振動(dòng)，并根據(jù)這些振動(dòng)，自動(dòng)調(diào)節(jié)相機(jī)的聚焦。壓電加速度傳感器還應(yīng)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3255C是一款單軸壓電式加速度傳感器，具有大頻寬，性價(jià)比高和耐高溫等特點(diǎn)，靈敏度15pC/g，工作溫度+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
應(yīng)用
1. Modal and structural analysis
模態(tài)與結(jié)構(gòu)分析
2. Vibration control
振動(dòng)控制
3. General purpose high temperature vibration monitoring
通用高溫振動(dòng)監(jiān)測
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
訂貨型號(hào)
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. 電纜：6002A, 6013A, 6019A, 6036A, 6037A, 6049A, 6057A, 6097A, 6411A, 6417A, 6419A, 6924A, 6991A
相關(guān)型號(hào)
3255A1 通用型
3255A2 通用型
3255A3 通用型
3255A4 通用型
3255A5 通用型
3255A6 通用型
