Indoor fire detection and alarm method and system based on wireless signal transmission

Abstract

The invention provides an indoor fire detection and alarm method and a system based on wireless signal transmission. The indoor fire detection and alarm method based on wireless signal transmission comprises the following steps: S1, a receiver receives a radio frequency signal from a transmitter and obtains CSI data, Gauss white noise is removed from the data by a Butterworth low-pass filter, and the method waits until the current environment goes into a stable state; S2, a statistical analysis is made of the probability on data of the current environment being in a stable state, and the angle of arrival, amplitude characteristics and phase difference characteristics are calculated; and S3, CSI data of the current environment is collected continuously, and the total fire probability is calculated. The existing WIFI equipment is used to collect signals for subsequent data processing and analysis. The current indoor environment can be judged effectively without additional equipment or calibration. The cost is saved. The method and the system are easy to use, and are of universal applicability.

Description

technical field [0001] The invention relates to an indoor fire detection method, in particular to an indoor fire detection and alarm method based on wireless signal transmission, and to an indoor fire detection and alarm system based on wireless signal transmission. Background technique [0002] Fire refers to the disaster caused by burning out of control in time and space. In today's society, fire is one of the important disasters that threaten social public safety and endanger people's lives and property safety. Judging from the data of fire accidents in recent years, the number of casualties caused by fires in my country is second only to mining accidents. The number of fires is close to 400,000 each year, the number of deaths is as high as 1,800, and the direct economic losses caused by fires are as high as 4 billion yuan. Down, there are more than 1,000 fires every day, and these data also show a rising trend. [0003] Major fire accidents in recent years include: firs...

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Problems solved by technology

[0006] In order to overcome the shortcomings of the low popularity of special smoke detectors in my country, the present invention provides a low-cost and high-precision method and system for indoor fire detection and alarm based on wireless network signals (radio frequency signals), aiming at specific In the indoor environment, by using the existing wireless network and equipment, the indoor environment can be effectively detected without prior training. If an abnormality occurs, the purpose of timely alarm and feedback can be achieved.

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