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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3235C1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50pC/g，最大工作温度高达+287℃。
The Dytran 3235C1 is a high temperature differential output accelerometer, offering extreme stability over a wide operating temperature range. Offered with a 50 pC/g sensitivity, model 3235C1 is unique in that it offers high charge sensitivity while simultaneously offering a balanced differential output.
Featuring a transverse mounted glass-to-metal sealed 2-pin radial connector and an industry standard tri-bolt mount, the Dytran model 3235C1 can reliably operate in temperatures up to +550°F (+287°C). Accelerometers are packaged in a stainless steel housing, hermetically sealed for reliable operation in high humidity and dirty environments, and case isolated to avoid EMI/ground loop interference.
特性
1. 50 pC/g sensitivity
2. 10,000 Hz upper frequency range (±15%)
3. 2-pin radial connector
4. Tri-bolt mount
5. 69 grams
6. Stainless steel
7. Hermetic
8. Case isolated
9. Differential output
10. High sensitivity
11. +550°F (+287°C) operation
12. Charge mode
应用
1. High temperature industrial vibration monitoring
高温工业振动监测
2. High temperature turbine vibration measurements
高温涡轮机振动测量
3. General purpose high temperature monitoring
通用高温监测
Weight, Max 1.9 oz 69 grams
Weight, Max 1.9 oz 69 grams Notes:
Size Length 1.65 inch 42.11 mm Height 1.03 inch 26.16 mm
Mounting, Three-hole Diameter 1.19 inch 30.23 mm
Housing Material 304L 304L Time Constants
Isolation Pins to Housing 10GΩ MIN 10GΩ MIN [
Sensitivity [2]+/-5% 50 pC/g 5.10 pC/m/s2
Acceleration Range [3] Gpeak [3] m/s2 peak
Frequency Range, ±15% [4] - 10,000 Hz [4]- 10,000 Hz
Resonance Frequency 35 kHz 35 kHz -60 -1
Transverse Sensitivity 5 % 5 % 0 0
Insulation Resistance (75°F) 250 GΩ 250 GΩ 100 0
Insulation Resistance (400°F) 10 GΩ 10 GΩ 200 0
Insulation Resistance (450°F) 100 MΩ 100 MΩ 300 0
Insulation Resistance (550°F)[5] 15 MΩ 15 MΩ 500 0.5
Operating Temperature -60 to 550 °F -51 to 287 °C
Capacitance, pin to pin 3200 pF 3200 pF
Unbalance between pins <2 pF <2 pF
Linearity 1 % 1 %
ENVIRONMENTAL
Shock, MAX 2000 g pk 19620 m/s2
Vibration, MAX 1000 g pk 9810 m/s2
Seal Hermetic Hermetic
Magnetic Sensitivity at 100 Gauss 0.000008 g/Gauss 0.000078 m/s2/Gauss
Base Strain Sensitivity 0.09 g/με 0.88 m/s2/με
订货型号
3235C1 高温型
3235C2 高温型
3235C3 高温型
配件
1. Model 6535 mounting screws (8-32)
2. Compatible Cables: 6838A, 6845A
