Wireless signal receiving circuit capable of judging positions and directions of firemen

Abstract

The invention belongs to the technical field of fire fighting equipment, particularly to a wireless signal receiving circuit capable of judging positions and directions of firemen. The wireless signal receiving circuit comprises antennae, transistors, resistances, a filter, a single chip machine and an integrated receiver. Base electrodes of the first transistor and the second transistor are respectively connected with the first antenna and the second antenna, and collectors thereof are respectively connected with the filter. An output line of the third transistor is connected with a channel of the first transistor and the first antenna, an output line of the fourth transistor is connected with a channel of the second transistor and the second antenna, and input lines of the third transistor and the fourth transistor are respectively connected with the single chip machine. One end of the integrated receiver is connected with the filter, and the other end thereof is connected with the single chip machine. One end of the fifth transistor is connected with the single chip machine, and the other end thereof is connected with the second resistance. The first resistance and the second resistance are connected with emitting electrodes of the first transistor and the second transistor in parallel.

Description

technical field [0001] The invention belongs to the technical field of firefighting equipment, and in particular relates to a wireless signal receiving circuit capable of judging the position and direction of firefighters. Background technique [0002] As one of the routine personal protective equipment for firefighters, the firefighter's rescue device has played a huge role in protecting the personal safety of firefighters. When firefighters are fighting, they are equipped with it to enter the disaster scene. Once the firefighters have no movement response for a certain period of time, the rescue device will send out sound and light alarm information to guide rescuers to search and rescue firefighters in distress. However, due to the complex and changeable environment of the disaster scene, there are many noise sources. Coupled with the barriers of surrounding buildings, the transmission distance of alarm information is limited, and the search and rescue process is extremel...

AI Technical Summary

Problems solved by technology

When firefighters are fighting, they are equipped with it to enter the disaster scene. Once the firefighters have no movement response for a certain period of time, the rescue device will send out sound and light alarm information to guide rescuers to search and rescue firefighters in distress. However, due to the complex and changeable environment of the disaster scene, there are many noise sources. Coupled with the barriers of surrounding buildings, the transmission distance of alarm information is limited, and the search and rescue process is extremely time-consuming. Not only the lives of firefighters in distress are threatened, but also new dangers are brought to rescuers.

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