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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3220E是一款高頻IEPE加速度傳感器/振動傳感器，靈敏度10mv/g，重量僅為2.7g。
The Dytran 3220E is a low profile, high frequency ring shaped IEPE accelerometer with a 10 mV/g sensitivity and an overall weight of just 2.7 grams.
Featuring a quartz shear sensing element encased in a lightweight titanium housing, electrical connection for the Dytran model 3220E is achieved via a specially designed coaxial glass-to-metal sealed 5-44 connector, which can be positioned in any desired radial direction. The model 3220E also features a miniature thru hole mounting configuration, allowing the sensor to be turned 360° prior to securing for ease of installation. Units are hermetically sealed for reliable operation in high humidity and dirty environments, as well as base isolated to avoid EMI/ground loop interference.
特性
1. 10 mV/g sensitivity
2. 500g range
3. 1 to 5,000 Hz (±5%)
4. 5-44 radial connector
5. ?.09-inch (2.36-millimeter) thru hole mount
6. 2.7 grams
7. Titanium
8. Hermetic
9. Base isolated
10. 360° cable orientation
11. IEPE
應用
1. Environmental Stress Screening (ESS)
環(huán)境應力篩選
2. Vibration control
振動控制
3. General purpose vibration measurements in space constrained environments
受限空間內的振動監(jiān)測
WEIGHT 2.7 Grams
SIZE, DIA X HEIGHT (SEE DWG 127-3220E) .41 X .25 IN
MOUNTING PROVISION THRU HOLE FOR #2 MOUNTING SCREW
MOUNTING SCREW, INSULATED (SUPPLIED) 2-56 X .437 LONG SS
CONNECTOR, RADIALLY MOUNTED 5-44 COAXIAL
MATERIAL, BASE, CAP & CONNECTOR TITANIUM ALLOY
ELEMENT TYPE QUARTZ, PLANAR SHEAR
PERFORMANCE
SENSITIVITY, ± 10% [1] 10 mV/G
RANGE F.S. FOR ± 5 VOLTS OUTPUT ± 500 G's
FREQUENCY RESPONSE, ± 5% 1 to 5,000 Hz
± 15% .66 to 10,000 Hz
NATURAL FREQUENCY, MOUNTED. >33 kHz
LINEARITY 1 %FS
TRANSVERSE SENSITIVITY, MAX. 5 %
STRAIN SENSITIVITY .03 G’s/??? @ 250 ??
RESOLUTION (EQUIVALENT ELECTRICAL NOISE) 0.007 G’s RMS
ENVIRONMENTAL
MAXIMUM VIBRATION/SHOCK 1500/2000 ± G's/G's PEAK
TEMPERATURE RANGE -60 to +250 oF
SEAL, HERMETIC [4] Glass-to-metal and TIG welded
COEFFICIENT OF THERMAL SENSITIVITY %/ F
ELECTRICAL
SUPPLY CURRENT/COMPLIANCE VOLTAGE RANGE [3] 2 to 20/+18 to +30 mA/Volts
OUTPUT IMPEDANCE, TYP. 100 Ohms
DISCHARGE TIME CONSTANT 0.8 to 2.0 Sec
OUTPUT BIAS VOLTAGE 9 to 11.5 VDC
OUTPUT SIGNAL POLARITY FOR ACCELERATION TOWARD TOP Positive
ELECTRICAL ISOLATION, CASE GROUND TO MOUNTING SURFACE 10 Gigaohms, min.
訂貨型號
3220E 超小型
3220M27 超小型
配件
1. Model 6165 mounting screw (2-56)
2. Model 4110C current source power unit, model 6167 adhesive mounting base
3. 電纜線：6014A, 6017A, 6021A, 6024A, 6025A, 6028A, 6029A, 6040A, 6056A, 6092A
相關型號
3220C1 高溫型
3220C 高溫型
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