Low Cost Smart Sensor Design
Low Cost Smart Sensor Design
复制标题
低成本智能传感器设计
DOI：
10.3844/ajeassp.2011.162.168
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
A. Takialddin
中科院分区：
文献类型：
--
作者：
Alaa' M. Smadi;A. Takialddin
问题说明：传感器具有本地处理能力，使其能够对本地条件做出反应，而不必返回到中央控制器。减小了智能传感器电路的体积和成本。方法：使用微控制器，如(PIC16C715)，在一块芯片上加一个8位ADC(模数转换器)。这种电路尺寸的减小使得有时可以将主传感器与信号处理电路合并在一个单元中，然后应该相应地修改查找表。智能传感器的程序移动性使系统能够通过施加已知输入电压信号来执行自校准例程，其中其对应的期望值存储在自校准码中。结果：测量信号的校正是将测量信号乘以增益校正值，然后将乘法的结果与偏移量补偿值相加。智能传感器对每个新的测量值执行自我校准例程，以适应系统环境中的任何变化，如温度漂移。结论：通过PIC16C715的实现，提高了系统的性能，降低了电路设计的复杂度和成本，且易于升级。
Problem statement: Sensor with local processing power that enables it to react to local conditions without having to refer back to the central controller. The size and the cost of smart sensor circuit have been reduced. Approach: The use of microcontroller, such as (PIC16C715), with an 8-bit ADC (Analogue to Digital Converter) in one chip. This reduction in the circuit size makes it possible sometimes to incorporate the primary sensor with the signal processing circuit in one unit, then the lookup table should be modified accordingly. The program mobility of smart sensor enables the system to perform self calibration routine by applying known input voltage signal, where its corresponding expected value is stored in the self calibration code. Results: The correction for the measurement signal is done by multiplying the measured signal by the gain correction value and then adding the result of the multiplication to the offset compensation value. The smart sensor performs the self calibration routine for every new measurement value, to adapt any changes in the system environment such as temperature drift. Conclusion: The system performance has been enhanced by implementing the PIC16C715 Circuit design complexity and cost has been reduced and also it’s easy to upgrade.