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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3225E是一款高温型加速度传感器/振动传感器，具有体积小、结构坚固，高密封、耐高温等特点，灵敏度1.8pC/g，最大工作温度高达177℃。
The Dytran 3225E is an ultra miniature teardrop low profile charge mode accelerometer with a sensitivity of 1.8 pC/g designed to mount in spaces inaccessible to other types of accelerometers. The sensor features a height of 0.15 inches (3.8 millimeters) and an overall weight of just 0.6 grams.
The sensors are designed to reliably operate in high temperatures up to +350°F (+177°C) and feature a ceramic shear sensing element in a lightweight laser welded titanium housing, with a three-foot integral cable terminating to a 10-32 jack.
The model 3225E is a member of the Dytran 3225E series of charge mode accelerometers. All units within the series have a sensitivity of 1.8 pC/g and adhesive mounting capabilities. They differ only in terms of their type of connector, environmental seal and electrical isolation.
特性
1. 1.8 pC/g sensitivity
2. 10,000 Hz upper frequency range (±10%)
3. Integral 3-foot cable assembly
4. Adhesive mount
5. 0.6 grams
6. Titanium
7. Ultra miniature teardrop design
8. +350°F (+177°C) operation
9. Charge mode
应用
1. Environmental Stress Screening (ESS)
环境应力筛选
2. Mechanical shock
机械冲击
3. PC board vibration measurements
印刷电路板振动测试
4. Product response testing
产品响应测试
5. General purpose vibration measurements where space is at a premium
通用振动测试
WEIGHT 0.6 GRAMS
SIZE (DIA x LENGTH HEX x HEIGHT) 0.25 x 0.36 x .150 INCHES
MOUNTING PROVISION FLAT MOUNTING SURFACE FOR ADHESIVE MOUNT
CONNECTOR, COAXIAL 10-32 JACK AT END OF FIXED 3 FT. CABLE
CASE MATERIAL TITANIUM
SENSING ELEMENT PLANAR SHEAR PIEZOCERAMIC
PERFORMANCE
SENSITIVITY, ±20% [2] [3] 2.0 pC/G
FREQUENCY RESPONSE, ± 10% [3] to 10,000 Hz
MOUNTED RESONANT FREQUENCY, NOM. 40 kHz
AMPLITUDE NON-LINEARITY (ZERO BASED BEST FIT ST.LINE METHOD) 2.0 % F.S., MAX.
TRANSVERSE SENSITIVITY, MAX. 5 PERCENT
STRAIN SENSITIVITY .0005 G's PER MICROSTRAIN @ 250/
ENVIRONMENTAL
MAXIMUM VIBRATION 400 G's, RMS
MAXIMUM SHOCK 5000 G's, PEAK
TEMPERATURE RANGE -60 TO 350 oF
MAXIMUM SURVIVAL TEMPERATURE +400 oF
THERMAL COEFFICIENT OF SENSITIVITY SEE CHART BELOW
ENVIRONMENTAL SEAL EPOXY
ELECTRICAL
CAPACITANCE INCLUDING ATTACHED 3 FT CABLE 490 pF
INSULATION RESISTANCE @ R.T. 5 X 10 8 MIN. OHMS
OUTPUT SIGNAL POLARITY FOR ACCELERATION TOWARD TOP NEGATIVE GOING
CASE GROUNDING CASE IS GROUNDED
订货型号
3225E 高温型
3225E1 高温型
3225E2 高温型
3225E3 高温型
配件
1. Model 6298 small petro mounting wax, (1) model 6591A installation removal wrench, (1) model 6003A03 cable assembly
2. Model 4110C current source power unit, 4705M series in-line charge amplifier (10-32 jack to BNC jack), 4751B series in-line charge amplifier (10-32 jack to 10-32 jack)
3. 电缆6013A, 6019A
相关型号
3225M40 高温型
3225M5 微型
3225M7 微型
3225M23T 微型TEDS
3225M24T 微型TEDS
3225M34T 微型TEDS
3225M36 微型
3224M37T 微型
3225M39 微型
3225F 微型
3225F1 微型
3225F2 微型
3225F3 微型
3225F4 微型
3225F5 微型
3225F6 微型
3225F7 微型
3225F1T 微型TEDS
3225F2T 微型TEDS
3225F3T 微型TEDS
3225F4T 微型TEDS
3225F5T 微型TEDS
