Improved infrared monitoring sensor

Abstract

The invention provides an improved infrared monitoring sensor. The improved infrared monitoring sensor comprises a temperature sensitive probe. The output end of the temperature sensitive probe is connected with a preamplifier circuit. The output of the preamplifier circuit is connected with a band-pass filter amplifier circuit. The output of the band-pass filter amplifier circuit is connected with a maximum peak detection circuit, a minimum peak detection circuit and a background level detection circuit. The output of the maximum peak detection circuit and the output of the background level detection circuit are connected with a high level detection circuit. The minimum peak detection circuit and the output of the background level detection circuit are connected with a low level detection circuit. The output of the high level detection circuit and the output of a threshold level given circuit are connected with a high level comparison circuit. The output of the low level detection circuit and the output of the threshold level given circuit are connected with a low level comparison circuit. The output of the high level comparison circuit and the output of the low level comparison circuit are connected with a DSP system. The improved infrared monitoring sensor can overcome the effects of outdoor natural conditions and provides a reliable monitoring mode.

Description

technical field [0001] The invention relates to the technical field of monitoring, in particular to an improved infrared monitoring sensor. Background technique [0002] The monitoring of key outdoor areas has always been an important research field. The current monitoring mainly focuses on video monitoring, infrared monitoring and other methods. Among them, video monitoring requires someone to be on duty at the monitoring end. When the watcher is negligent or walks away, real-time warning cannot be achieved. There are serious loopholes. Infrared monitoring is a more reliable method, which can give corresponding signals and give early warning according to the mover entering the effective range of the probe. However, due to the complex outdoor environmental conditions, especially in summer, affected by high temperature or even lightning, the infrared probe cannot distinguish between the sun heat source and the intruder heat source, and the effect of infrared monitoring is gr...

AI Technical Summary

Problems solved by technology

However, due to the complex outdoor environmental conditions, especially in summer, affected by high temperature or even lightning, the infrared probe will not be able to distinguish the sun heat source from the intruder heat source, and the effect of infrared monitoring will be greatly weakened.

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