The invention relates to a detection and early-warning method of an early-
warning system based on abnormal gas detection in high-
voltage chamber. The abnormal gas
detection early-
warning system is composed of a micro-processor, an I / O (Input / Output) interface, a
liquid crystal display screen, a keyboard, an analog-
digital converter, a sampling holder, a multipath channel switching switch, a current-to-
voltage converter, an HCL gas sensor, an SO2 gas sensor, a CO gas sensor and an
ozone gas sensor, wherein the I / O interface, the
liquid crystal display screen, the keyboard and the analog-
digital converter are connected with the micro-processor, and the sampling holder, the multipath channel switching switch, the current-to-
voltage converter, the HCL gas sensor, the SO2 gas sensor, the CO gas sensor and the
ozone gas sensor are sequentially connected with the analog-
digital converter. The control program of the early-warning method adopts two
timer interruptions, a main
software program used for each
branch control of the program and a
timer interruption 0 used for
data acquisition control. The early-
warning system has the advantages that multipath signals are sequentially acquired through multi-channel switching, and analog quantity signals are converted into data signals identified by a computer and are compared with a preset range; and if the signals are beyond the range, the
system can give an alarm to achieve the purpose of early warning; meanwhile, a large-screen human-
machine interface human-
machine interface is arranged, and user operation is convenient and flexible.