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(lái)檢測(cè)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(guó)Dytran的3122C是一款高溫型加速度傳感器/振動(dòng)傳感器，集成陶瓷應(yīng)變片，具有高密封，結(jié)構(gòu)堅(jiān)固和耐高溫特點(diǎn)，工作溫度高達(dá)191攝氏度。
The Dytran 3122C is a piezoelectric charge mode accelerometer with sensitivity of 50 pC/g, designed to offer reliable performance in temperatures up to +375°F (+191°C).
The model 3122C features a hermetically sealed, stainless steel design and incorporates a ceramic sensing element operating in compression mode. Weighing 25 grams, the model 3122C utilizes a standard 10-32 radial connector with 10-32 tapped hole.
特性
1. 50 pC/g sensitivity
2. 5,000 Hz upper frequency range (±8%)
3. 10-32 radial connector
4. 10-32 tapped hole
5. 25 grams
6. Stainless steel
7. Hermetic
8. Small size
9. +375°F (+191°C) operation
10. Charge mode
應(yīng)用
1. Environmental Stress Screening (ESS)
環(huán)境應(yīng)力篩選
2. Vibration control
振動(dòng)控制
3. General purpose high temperature vibration monitoring
高溫振動(dòng)監(jiān)測(cè)
SPECIFICATION VALUE UNITS
RANGE +/- 500 G
MAXIMUM SHOCK 2000 G, PEAK
MAXIMUM VIBRATION 1000 G, RMS
SENSITIVITY, +20%/-10% (3122C) [1] 50 pC/G
(3122C2) [1] 15 pC/G
MOUNTED RESONANT FREQUENCY, NOM. 25 kHz
FREQUENCY RESPONSE, +/- 8% [2] [2] to 5000 Hz
OPERATING TEMPERATURE RANGE (3122C) -60 to +375 F
(3122C2) -60 to +500 F
CAPACITANCE, NOM.(3122C) 3000 pF
(3122C2) 520 pF
AMPLITUDE LINEARITY +/-2 %FS
TRANSVERSE SENSITIVITY 5 %
SIGNAL POLARITY [3] NEGATIVE [2]
SIZE, HEX x HEIGHT 0.5 X 0.96 IN
WEIGHT 25 GM
GROUND RETURN CASE IS SIGNAL RETURN
CONNECTOR, TRANSVERSE MOUNTED COAXIAL 10-32
CASE MATERIAL STAINLESS STEEL 316L
MOUNTING PROVISION TAPPED HOLE IN BASE 10-32
訂貨型號(hào)
3122C
3122C2 高溫型
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), model 6196 magnetic mounting stud (10-32), model 6213 adhesive mounting base (10-32)
3. 電纜線：6002A, 6013A, 6019A, 6036A, 6037A, 6049A, 6057A, 6097A, 6411A, 6417A, 6419A, 6924A, 6991A
相關(guān)型號(hào)
3152C
3443C
