Lora networking smog alarming system and method

Abstract

The invention belongs to the technical field of alarm equipment and discloses a lora networking smog alarming system and method. The lora networking smog alarming system comprises a smog detection module, an Lora module and an Lora gateway. The alarming method comprises steps that when smoke enters an optical maze, an infrared receiving tube on the optical maze receives infrared light, and an intelligent alarm circuit determines whether the threshold is exceeded and sends an alarm if yes; and a high level trigger signal is sent through an INT pin, the Lora module is activated from a Sleep mode to a work mode, after the Lora module receives data, the MCU of the Lora module opens a radio unit and transfers the data to an RF unit, and the data are converted into electromagnetic waves to be emitted. The smog detection data transmission distance of the invention is far, and after the low power consumption Lora module is adopted, the transmission distance of the smog alarming system is more than 2500m, which is 20 times of the current transmission distance of the RF 470MHz.

Description

technical field [0001] The invention belongs to the technical field of alarm equipment, and in particular relates to a lora networking smoke alarm system and an alarm method. Background technique [0002] With the development of economy, the awareness of fire prevention has gradually attracted people's attention. With the increasing density of urban population, in the event of a fire, the losses are often huge, especially for household fires, which are prone to unfavorable factors such as untimely firefighting, lack of fire-fighting equipment, panic of the people present, and slow escape, which eventually leads to loss of life and property. According to statistics, there are more than 50,000 domestic fires in my country every year, and more than 800 people are killed, accounting for more than 70% of the fire deaths. [0003] At present, there are mainly two types of independent smoke alarm systems: non-networked and networked. Among them, the non-networked independent smoke...

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Problems solved by technology

[0006] The number of connected smoke alarm systems is small: due to the short transmission distance of the module, the number of smoke alarm systems that can be connected to the repeater is limited, and the number of smoke alarm systems that can be connected to the existing technology is less than 128; The limitation of quantity leads to the need to deploy more relays to support the access of more smoke alarm system detectors, which increases the cost of the system;

[0007] The transmission of smoke alarm information is divided into two layers of network, which is prone to failure: because the smoke alarm system uses RF 470MHz wireless transmission module to transmit the distance is relatively short, the data transmission to the background needs to be summarized through the repeater first, and then wirelessly transmitted through Zigbee to the Gateway; the two-layer network architecture increases the probability of failure in the data transmission link. When the relay fails, the detection data of the smoke alarm system in its coverage area cannot be uploaded.

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