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3316C是一款高溫型加速度傳感器/振動傳感器，具有體積小、結(jié)構(gòu)堅固，高密封、耐高溫等特點，重6g，工作溫度高達482℃。
The Dytran 3316C is an ultra high temperature piezoelectric charge mode accelerometer, designed to reliably operate in temperatures up to +900°F (+482°C).
Featuring a unique single crystal charge mode sensing element mounted in a hermetically sealed, miniature Inconel™ housing, units utilize the latest in planar shear technology. In order to operate at such high temperatures, model 3316C was designed with a unique, Dytran patented feature. Units employ a "silver window" on the top cover of the accelerometer housing, which provides oxygen access to the crystal at high temperatures while maintaining the unit's hermetic sealing.
The Dytran model 3316C weighs just 6 grams and has a height of just 0.36 inches (9.1 millimeters), making it ideal for use in locations inaccessible to other types of accelerometers. Offered with a sensitivity between 1 and 2 pC/g and a 10,000 Hz upper frequency response, the model 3316C has a 5-40 tapped hole and 10-32 radial connector (exact sensitivity is provided on the calibration certificate supplied with each sensor).
特性
1. 1 to 2 pC/g sensitivity
2. 10,000 Hz upper frequency range (±10%)
3. 10-32 radial connector
4. 5-40 tapped hole
5. 6 grams
6. Inconel™
7. Hermetic
8. Miniature cubic design
9. High frequency response
10. +900°F (+482°C) operation
11. Charge mode
應用
1. Automotive vibration studies
汽車振動研究
2. Exhaust system analysis
排氣系統(tǒng)分析
3. Engine vibration analysis
發(fā)動機振動分析
4. Environmental Stress Screening (ESS)
環(huán)境應力篩選
Weight, Max 0.21 oz 6.0 grams
Size Square x Height .40 x .36 Inches 10.16 x 9.10 mm
Frequency Range, ±10% [4] to 10000 Hz [4] to 10000 Hz 10
Resonant Frequency > 45 kHz > 45 kHz
Capacitance 120 pF 120 pF
Linearity [2] ± 1% % F.S. ± 1% % F.S.
Phase Response (±5°) [4] to 3000 Hz [4] to 3000 Hz
Maximum Transverse Sensitivity 5 % 5 %
Strain Sensitivity, Max 0.003 g/με 0.03 m/s2/με
Insulation resistance, (Connector pin to case) at 75 °F > 5 MΩ at 75 °F > 5 MΩ
at 900 ?F > 0.25 MΩ at 900 °F > 0.25 MΩ
Coefficient of Thermal Sensitivity 0.02 %F 0.02 %F
Ground Isolation Case Ground Case Ground
ENVIRONMENTAL
Maximum Vibration ±6000 G, peak ±5886 m/s2, peak
Maximum Shock ±10000 G, peak ±49050 m/s2, peak
Temperature Range -60 to+900 °F -51 to+482 °C
訂貨型號
3316C
3316C1
3316C2
3316M1
3316M2
3316M3
3316M5
配件
1. Model 6584 mounting stud (5-40 to 10-32)
2. Model 6763 hi-temp isolated tri-mount base, model 6759 hi-temp triaxial mounting block, model 6762 hi-temp triaxial mounting block, 6998 isolated mounting base
3. 電纜線：6946A, 6979A, 6999A
相關(guān)型號
3220C1
3225E
