摘要
设计了以ARM微处理器为核心的中央控制处理单元,以完成振动传感器幅频特性测试的系统。利用ARM上集成的数字模拟转换电路(D/A)的输出通道1产生频率可调的等幅正弦信号,输出通道2对可变增益运放电路进行控制,使得振动传感器输出信号幅度在系统工作范围内,采用模拟数字转换电路(A/D)将振动传感器输出的信号整周期采样,对信号的采样序列,运用Goertzel算法检测信号的幅度。实验结果证实了该测试系统软、硬件设计的正确性和有效性。
A central control process unit with ARM as its core is designed in order to implement the amplitude-frequency characteristic test system for the vibration sensor.Output channel 1 of the D/A of the ARM can generate a frequency-adjustable sine signal,while output channel 2 control the variable gain amplifier circuit.Thus the amplitude of the vibration sensoris output signal will be in the working range.Then full period sampling is done to the output signal,using A/D of the ARM.Finally Goertzel algorithm is used to detect the amplitude of signal.The accuracy and effectiven-Ess of this system is verified by the experiment results.
出处
《传感技术学报》
CAS
CSCD
北大核心
2011年第11期1564-1568,共5页
Chinese Journal of Sensors and Actuators
基金
航空科学基金项目(2010ZC53028)
