概述
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.
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。
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.
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。
特性
1. 2,000 mV/g sensitivity
2. 2g range
3. 0 to 400 Hz frequency range (3dB)
4. 5-foot integral cable
5. Mounting via two 8-32 screws
6. 20 grams
7. Aluminum
8. Differential output
9. +5 VDC operation
10. Low profile
11. DC response
应用
1. Airbag testing
2. Crash testing
3. Robotics
4. Seismic monitoring
5. Tilt measurement
通过测量由于重力引起的加速度，你可以计算出设备相对于水平面的倾斜角度。通过分析动态加速度，你可以分析出设备移动的方式。但是刚开始的时候，你会发现光测量倾角和加速度好像不是很有用。但是，工程师们已经想出了很多方法获得更多的有用的信息。
订货型号
Model Input Range (g) Frequency Sensitivity Differential Max.Shock Noise
response (Hz) ±5% (mV/g) (0.1ms) (μg/√Hz)
7504A1 ± 2 nbsp; 2000 2000 8
7504A2 ± 5 nbsp; 800 2000 7
7504A3 ± 10 nbsp; 400 5000 10
7504A4 ± 25 nbsp; 160 5000 25
7504A5 ± 50 nbsp; 80 5000 50
7504A6 ± 100 nbsp; 40 5000 100
7504A7 ± 200 nbsp; 20 5000 200
7504A8 ± 400 nbsp; 10 5000 400
