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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5335是一个混合振动监测系统，由加速度传感器，放大器和2线（IEPE）电源单元组成，最大工作温度高达482℃。
The Dytran 5335 is a high temperature hybrid vibration monitoring system, consisting of a paired differential charge mode accelerometer and in-line miniature differential charge amplifier, operating from a constant current 2-wire (IEPE) power unit, and permanently joined together as a single unit with interconnecting hardline cable.
The unique configuration of the Dytran model 5335 is known as a hybrid system because it combines both IEPE and charge mode piezoelectric technologies into a single operating unit. The accelerometer is connected to the input of the charge amplifier via an 18-inch long hardline cable (SiO2) insulated which then connects to a soft-line Teflon™ insulated cable assembly. The hardline cable assembly is unaffected by high temperatures at the point of measurement.
The model 5335 features a case isolated design to avoid EMI/ground loop interference, with hermetic sealing for reliable operation in high humidity and dirty environments. It has an industry standard tri-bolt mount, stainless steel construction, and utilizes ultra high temperature piezoelectric crystals in compression mode for extremely stable operation in temperatures up to +900°F (+482°C).
特性
1. 10 mV/g sensitivity
2. 500g range
3. 18-inch integral hardline cable assembly
4. Tri-bolt mount
5. 400 grams
6. Stainless steel
7. Hermetic
8. Case isolated
9. Integrated differential amplifier
10. Uniquely combines IEPE and charge output technology, seamlessly operating as a single unit
11. +900°F (+482°C) operation
12. IEPE
应用
1. Aircraft turbine measurements
飞行器涡轮测试
2. High temperature turbine vibration measurements
高温涡轮机振动测试
3. Ultra high temperature industrial monitoring
超高温工业监测
4. General purpose ultra high temperature vibration monitoring
高温振动监测
Weight, including cables,accel and amplifier 14 oz 400 grams
Size Acclerrometer Case Length 1.2 Inches 30 mm
Case Width 1.3 Inches 34 mm
Case Height 0.8 Inches 19 mm IC charge amplifier.
Charge Amplifier Case length 4.4 Inches 113 mm
Diameter Ø 0.63 Inches Ø 16 mm
Cable from accel. To chg.amp., Length 52.4 Inches 1331 mm
Mounting provision, Three -hole flange for 8-32 UNC-2A Screws 8-32 UNC-2A Screws
Connector from charge amplifier D38999/25YA98PA D38999/25YA98PA
Housing Material 304L 304L
Sensitivity, ±5% [1] 10 mV/g 1.02 mV/m/s2
Range F.S for ± 5 Volts Output ±500 g
Frequency Range, ±5% 4.8 to 1400 Hz 4.8 to 1400 Hz
Frequency Range, -3db 1.6 to 4200 Hz 1.6 to 4200 Hz
Resonant Frequency, Nominal 35 kHz 35 kHz
Equivalent Electrical Noise Floor 0.015 Grms 0.147 m/s2 rms
Linearity [2] ± 2% % F.S. ± 2% % F.S.
Maximum Transverse sensitivity 5 % 5 %
Strain Sensitivity @ 250 με 0.012 g/με 0.117 m/s2/με
ENVIRONMENTAL
Maximum Vibration ±600 g's,peak ±5886 m/s2 peak
Maximum Shock ±2000 g's,peak ±19620 m/s2 peak
Temperature Range (Acclerometer) -65 to 900 °F -54 to 482 °C
Temperature Range (Charge Apmlifier) -50 to 185 °F -45 to 85 °C
Seal, (Acclerometer & chg.amp) Hermetic Hermetic
Coefficient of Thermal Sensitivity 0.02 %/°F 0.02 %/°C
Electrical
Supply Current Rnge [3] 4 to 20 mA 4 to 20 mA
Complaince Voltage Range 15 to 30 Volts 15 to 30 Volts
Output Impedence,Typ 100 Ω 100 Ω
Bias Voltage +7 to +9 VDC +7 to +9 VDC
Discharge Tme Constant, Nom 0.1 Sec 0.1 Sec
Output Signal Polarity for Accleration Towards Top Positive Positive
Electrical Isolation,Ground Wire to Case 10 GΩ,min 10 GΩ,min
订货型号
5355 高温加速度传感器
配件
Model 6535 mounting screws (8-32)
相关型号
5334 高温加速度传感器
