The invention discloses a network-free self-positioning emergency help-seeking
relay control method and a bidirectional guiding device, and belongs to the technical field of fire-fighting emergency lighting, intelligent evacuation indication and
wireless emergency communication. The method comprises the following steps: step S101, by using a
radio frequency TOF (
Time of Flight)
distance measurement technology, calculating the relative position between devices by measuring the
propagation time difference of a
radio frequency signal between the devices, and realizing network-free self-positioning without an external network and a
satellite positioning system; step S102, transmitting the
distress signal from the position of the trapped person to a rescue worker or an external receiving device step by step through
relay transmission between devices by adopting a distributed chained
relay mode so as to realize
signal transmission in a network-free environment; and step S103, using a bidirectional double-color independent lamp group to respectively and synchronously indicate escape and rescue paths with different colors of light so as to realize bidirectional synchronous guidance. The device integrates a
radio frequency ranging module, a
signal relay module and a two-color lamp group module, and all the modules work cooperatively to complete the functions of self-positioning, signal relay and two-way guidance. The
system has the beneficial effects that the dependence of a traditional
system on an external network and
satellite positioning is broken through, and self-positioning and
distress signal transmission in a full-scene network-free environment are realized; escape and rescue
route conflicts are avoided through two-way synchronous guidance, and the rescue efficiency is improved;
pairing and debugging are not needed in the whole process, the installation and maintenance cost is reduced, and the
system is suitable for emergency escape and personnel
search and rescue in complex scenes such as buildings, underground garages, tunnels, mines and field scenic spots.