Title :
A design of a low cost high precision data acquisition system
Author_Institution :
Dept. of Comput. Sci. & Technol., Taiyuan Univ. of Technol., China
Abstract :
The paper presents a high precision data acquisition system with the LM231 V/F transform chip and a low cost single chip microcomputer. The V/F transformer features high precision, high linearity and with a simple peripheral circuit. The single chip microcomputer is connected directly to an interface with the LM231 chip that has a lower-power coupling circuit, to improve the system working reliability. Fully utilised the hardware and software resources, the system identifier rate reaches 12 digits and its accurate is 0.02%. The system is available for use in the field of measurements of a weighing system, voltage, current intensity, methane density, etc. In the case of long connecting distance between the sensors and upper computer, the RS-485 interface or wireless data transmitting/receiving module can be used to realise remote data communication.
Keywords :
analogue-digital conversion; data acquisition; data communication; microcomputer applications; peripheral interfaces; AD conversion; LM231 transform chip; RS-485 interface; precision data acquisition system; remote data communication; single chip microcomputer; Costs; Coupling circuits; Current measurement; Data acquisition; Density measurement; Hardware; Linearity; Microcomputers; Software systems; Weight measurement;
Conference_Titel :
Intelligent Control and Automation, 2002. Proceedings of the 4th World Congress on
Print_ISBN :
0-7803-7268-9
DOI :
10.1109/WCICA.2002.1020077
