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压电式加速度传感器，又称振动传感器，是基于压电晶体的压电效应工作的。某些晶体在一定方向上受力变形时，其内部会产生极化现象，同时在它的两个表面上产生符号相反的电荷；当外力去除后，又重新恢复到不带电状态，这种现象称为“压电效应”，具有“压电效应”的晶体称为压电晶体。常用的压电晶体有石英、压电陶瓷等，在现代生产生活中被应用于许许多多的方面，如手提电脑的硬盘抗摔保护，目前用的数码相机和摄像机里，也有加速度传感器，用来检测拍摄时候的手部的振动，并根据这些振动，自动调节相机的聚焦。压电加速度传感器还应用于汽车安全气囊、防抱死系统、牵引控制系统等安全性能方面。
美国Dytran的3220E是一款高频IEPE加速度传感器/振动传感器，灵敏度10mv/g，重量仅为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. Ø.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
应用
1. Environmental Stress Screening (ESS)
环境应力筛选
2. Vibration control
振动控制
3. General purpose vibration measurements in space constrained environments
受限空间内的振动监测
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.
订货型号
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. 电缆线：6014A, 6017A, 6021A, 6024A, 6025A, 6028A, 6029A, 6040A, 6056A, 6092A
