Title :
Microprocessor based fibre optic environmental monitoring system for underground mine
Author :
Sen, Sunit K. ; Datta, Asit K.
Author_Institution :
Dept. of Appl. Phys., Calcutta Univ., India
fDate :
Sept. 28 1991-Oct. 4 1991
Abstract :
The development of an environmental monitoring system for underground mines in which optical fiber is used as the medium of transmission of data from sixteen underground sensors at different galleries to the surface stations is described. Both analog and Manchester coded digital signals are handled depending on the system complexities and expansion needs. For acquisition and display of data along with the generation of signals for high and low alarm, simple hardwared logic is used, whereas for maintaining a database in an integrated mine, a microprocessor-based system is proposed. The system has been tested on a INTEL 8085-based microprocessor consisting of 4K RAM memory and 8355 I/O ports for interfacing. Graded index multimedia optical fiber with 50 mu m core and 125 mu m fiber diameter operating at 825 nm is used.<>
Keywords :
microcomputer applications; mining; optical communication equipment; optical fibres; 8355 I/O ports; INTEL 8085-based microprocessor; Manchester coded digital signals; RAM memory; analog signals; data transmission; environmental monitoring system; graded index multimedia, optical fiber; hardwared logic; microprocessor-based system; optical fiber; sensors; Displays; Fiber optics; Microprocessors; Monitoring; Optical fiber sensors; Optical fibers; Optical sensors; Sensor phenomena and characterization; Sensor systems; Signal generators;
Conference_Titel :
Industry Applications Society Annual Meeting, 1991., Conference Record of the 1991 IEEE
Conference_Location :
Dearborn, MI, USA
Print_ISBN :
0-7803-0453-5
DOI :
10.1109/IAS.1991.178025
