美国DYTRAN 3003B微型 振动传感器
深圳市汉斯福特科技有限公司
杨工
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概述
The Dytran 3003B is a high performance triaxial IEPE accelerometer capable of operating at temperatures up to +347°F (+175°C) and was designed for down-hole drill head vibration monitoring.
加速度传感器是一种能够测量加速力的电子设备。加速力就是当物体在加速过程中作用在物体上的力，就好比地球引力，也就是重力。加速力可以是个常量，比如g，也可以是变量。加速度计有两种：一种是角加速度计，是由陀螺仪（角速度传感器）的改进的。另一种就是线加速度计。
Sensors developed for down-hole vibration monitoring must be able to deliver accurate and reliable data, while simultaneously tolerating harsh conditions. Critical characteristics of these sensors include a miniature design, high temperature operation, and the ability to operate at low power levels. The Dytran model 3003B is ideal for such applications, as it is packaged in a miniature titanium housing with a vertical height of just 0.37-inches (9.4-millimeters), is capable of reliable operation at temperatures up to +347°F (+175°C), and was specially designed to operate from +4.0 to +5.5 VDC compliance voltage.
压电式加速度传感器又称压电加速度计。它也属于惯性式传感器。压电式加速度传感器的原理是利用压电陶瓷或石英晶体的压电效应，在加速度计受振时，质量块加在压电元件上的力也随之变化。当被测振动频率远低于加速度计的固有频率时，则力的变化与被测加速度成正比。
The Dytran model 3003B triaxial accelerometer is offered with a sensitivity of 2 mV/g and 500g range, and is designed with adhesive mounting capabilities. Weighing just 6 grams, units incorporate four permanently attached 22-inch long lead wires.
基于世界领先的MEMS硅微加工技术，压阻式加速度传感器具有体积小、低功耗等特点，易于集成在各种模拟和数字电路中，广泛应用于汽车碰撞实验、测试仪器、设备振动监测等领域。
特性
1. 2 mV/g sensitivity
2. 500g range
3. 2 to 5,000 Hz frequency range (±10%)
4. 22-inch integral cable
5. Adhesive mount
6. 6 grams
7. Operates from +4.0 to +5.5 VDC
8. +347°F (+175°C) operation
9. Triaxial
10. IEPE
伺服式加速度传感器是一种闭环测试系统，具有动态性 能好、动态范围大和线性度好等特点。其工作原理，传感器的振动系统由 "m-k”系统组成，与一般加速度计相同，但质量m上还接着一个电磁线圈，当基座上有 加速度输入时，质量块偏离平衡位置，该位移大小由位移传感器检测出来，经伺服放大器 放大后转换为电流输出，该电流流过电磁线圈，在永久磁铁的磁场中产生电磁恢复力，力图使质量块保持在仪表壳体中原来的平衡位置上，所以伺服加速度传感器在闭环状态下工作。由于有反馈作用，增强了抗干扰的能力，提高测量精度，扩大了测量范围，伺服加速度 测量技术广泛地应用于惯性导航和惯性制导系统中，在高精度的振动测量和标定中也有应用。
特性
1. Down-hole drill head vibration monitoring
2. Low turn-on voltage applications where power supply is limited
参数
Weight 0.21 oz 6.0 grams Notes:
Connector, Type 4 Wire Integral Cable 4 Wire Integral Cable
Mounting Adhesive Mount Adhesive Mount
Material, Housing/Connector Titanium Alloy Titanium Alloy
Sensing Element Quartz Quartz
Sensitivity, ±10% [1] 2.0 mV/g 0.20 mV/m/s2
Range, Full Scale (each axis) ±500 g ±4905 m/s2
Frequency Response, ± 3dB 2 to 5000 Hz 2 to 5000 Hz
Resonant Frequency >30 kHz >30 kHz
Equivalent Electrical Noise 0.007 grms 0.07 m/s2 rms
Linearity [2] ±1 % F.S. ±1 % F.S.
Maximum Transverse sensitivity 5 % 5%
Full Scale Voltage Output ±1 Volts ±1 Volts
Maximum Vibration ±600 gpeak ±5886 m/s2 peak
Maximum Shock ±5000 gpeak ±49050 m/s2 peak
Temperature Range -40 to +347 °F -40 to +175 °C
Seal [3] Hermetic Hermetic
Base Strain Sensitivity @ 250µɛ < 0.014 g/µε < 0.14 m/s2/µε
ELECTRICAL
