概述
加速度传感器中有一种是三轴加速度传感器,同样的它是基于加速度的基本原理去实现工作的,加速度是个空间矢量,一方面,要准确了解物体的运动状态,必须测得其三个坐标轴上的分量;另一方面,在预先不知道物体运动方向的场合下,只有应用三轴加速度传感器来检测加速度信号。由于三轴加速度传感器也是基于重力原理的,因此用三轴加速度传感器可以实现双轴正负90度或双轴0-360度的倾角,通过校正后期精度要高于双轴加速度传感器大于测量角度为60度的情况。三轴加速度传感器的好处就是在预先不知道物体运动方向的场合下,只有应用三维加速度传感器来检测加速度信号。三维加速度传感器具有体积小和重量轻特点,可以测量空间加速度,能够全面准确反映物体的运动性质。
美国Dytran的7504A1是一款高精度加速度传感器/振动传感器,频响范围0-400Hz,集成电容感应元件、电路放大器、低噪电子和输出,铝合金外壳封装,应对高度潮湿和多尘的工作环境。
The Dytran 7504A1 is a high precision single axis variable capacitance (VC) accelerometer available with a range of 2g. These high performance accelerometers combine an integrated VC accelerometer chip with high drive, low impedance buffer for low level acceleration measurements.
Tailored for zero-to-medium frequency applications, the model 7504A1 features a low end frequency response of 0 Hz (DC) and upper frequency range of 400 Hz. This module contains a MEMS capacitive sensing element, a custom integrated circuit amplifier, and differential output, packaged in a rugged aluminum housing weighing 20 grams. Units incorporate an integral 5-foot cable assembly terminating to flying leads and are easily mounted via two 8-32 screws. On board regulation is provided to minimize the effects of supply voltage variation, and the model 7504A1 is relatively insensitive to temperature changes and thermal gradients.
