CN113138403A

CN113138403A - Mobile group location system tracking wireless beacons

Info

Publication number: CN113138403A
Application number: CN202010164994.6A
Authority: CN
Inventors: 尹梦寒; 李昌旋
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-11
Filing date: 2020-03-11
Publication date: 2021-07-20

Abstract

The invention relates to a mobile group positioning system for tracking a wireless beacon, wherein a positioning network is formed by a fixed receiver and a mobile phone together, the wireless beacon uses a public frequency band to send out an ID code in a unidirectional and timed mode, the receiver identifies the ID code and sends the ID code to a server through a mobile phone communication network, a background program analyzes the ID codes received by different receivers, and the position of the adjacent beacon is determined according to the position coordinate of the receiver. The positioning network has good expansibility, is convenient to temporarily and quickly deploy, forms an indoor and outdoor seamless butt joint positioning system, realizes complete coverage without dead angles, and is particularly suitable for crowd monitoring, child searching and pet retrieving.

Description

Mobile group location system tracking wireless beacons

(I) technical field

The invention relates to an outdoor/indoor positioning system based on wireless beacon tracking.A positioning network consists of signal receivers, the geographic positions of the receivers are known, the positions of the receivers are adjustable to expand the positioning network, and a background analyzes signals of beacons received by different receivers, so that single-point or multi-point positioning can be realized more accurately. The invention can rapidly expand the positioning network, accurately identify the close wireless beacons, is particularly suitable for establishing a mobile group positioning network, and realizes indoor and outdoor comprehensive positioning coverage of personnel/pets.

(II) background of the invention

The GPS is a common positioning technology, the equipment performs positioning operation by receiving a plurality of satellite signals of the space orbit, and the more the received satellite signals are, the higher the positioning accuracy is. However, if the satellite signal is in a building, the satellite signal is greatly limited and attenuated, and high precision is difficult to achieve. What is more troublesome is that the position difference of the adjacent floors of the building is small, the error of the civil GPS measuring height is very large, and the building positioning system has almost no practical value in indoor positioning.

Technologies capable of realizing indoor positioning include wireless signal, sound wave, visible light and geomagnetic field positioning. Wireless signals need to arrange a plurality of wireless hotspots indoors, the position is determined by reading the ID code of the transponder and measuring the signal strength, the accuracy is limited, and the cost is low; the ultrasonic wave is arranged in a room, the locator transmits the ultrasonic wave to the fixed receiver, so that the distance between the locator and each receiver is obtained, the position of the locator is determined, the accuracy is high, but a large amount of hardware is required to be arranged; visible light sends out optical signals through the LED lamps on the ceiling to transmit the ID codes, the transponder confirms the position by identifying the ID codes and measuring the light intensity, the positioning precision is high, but the optical signals are easily blocked; the geomagnetic field is positioned by utilizing the difference of different space magnetic fields, each floor of the building can respectively construct a unique geomagnetic field map, the geomagnetic field maps can be measured to determine the position and generate a corresponding indoor map, the system needs to be measured and modeled in advance, and the early-stage investment is large.

It can be seen that the above positioning techniques all require hardware to be installed in advance or indoor maps to be generated, and due to the extremely large number of buildings, it is difficult to preset each building in advance. Designing an expandable and self-learning indoor positioning system has become an urgent technical requirement.

In view of the above problems, the present invention provides a group positioning system for tracking wireless beacons, in which a plurality of signal receivers form a positioning network, and the receivers can be preset in advance or temporarily deployed, and have high expansibility. The wireless beacon uses the public frequency band, and sends out the ID code in a unidirectional and timing mode. The effective receiving radius of the signal is 0-30 m, the receiver identifies the ID code and sends the ID code to the server through a mobile phone communication network, the background program analyzes the ID codes received by different receivers, and the position of the adjacent beacon is determined according to the position coordinates of the receivers. The invention can rapidly deploy the receiver, efficiently expand the positioning network, realize positioning coverage of more areas, solve the technical defects of the GPS system and form an innovative positioning system for indoor and outdoor seamless docking.

Disclosure of the invention

The GPS positioning needs a whole set of chip components, is relatively power-consuming, needs to be charged frequently, and the existing hardware is large in size and inconvenient to carry. The wireless signal positioning is relatively simple, the wireless beacon uses a public frequency band, a specific ID code is sent out at regular time, and the sending frequency is adjustable. The position of the receiver is preset, the receiver is provided with a communication module and can upload the ID codes of the beacons in real time, and the background program calculates and determines the positions of the beacons according to the ID codes uploaded by different receivers. The wireless beacon is used as a locator, the beacon does not receive signals, a supporting circuit is greatly simplified, hardware is small and exquisite, and the wireless beacon is suitable for long-term use and does not need to be charged repeatedly.

The beacon of the present invention has no GPS component and cannot be located directly. The beacon and the receiver do not need to communicate in two directions, and the receiver is only responsible for receiving the ID code of the beacon and does not need to send back data. The signal strength of the beacon is specially designed, the beacon can be recognized by a receiver within a radius range of 0-30 meters, and after the beacon exceeds the designed range, the receiver filters weak signals and considers the weak signals as not received. The invention divides the receiver into two categories, one is a fixed hotspot without a GPS component, and the other is a mobile hotspot containing a GPS component. The receivers are provided with communication modules and are connected with the mobile phone base station in a wireless mode. And after the background program confirms the ID code of the beacon, the position of the receiver is marked as the position of the beacon and displayed on the electronic ground, and the beacon is positioned. The receiver repeatedly receives the ID code for a certain period of time, indicating that the beacon position remains unchanged.

The above is single-point positioning, and the precision is not high. To improve the positioning accuracy, a plurality of receivers can be uniformly arranged in the area, signals of a certain beacon are received by the receivers, the signal strength is different, the position of the beacon can be calculated more accurately by a background program through a multipoint positioning algorithm according to the positions of different receivers, and the positioning accuracy is greatly improved.

Based on the fact that a positioning network is lacked in a plurality of buildings, the invention introduces the concept of mobile group positioning and can rapidly deploy the positioning network. The fixed hotspot does not have a GPS component, and the installer positions the hotspot through a handheld positioning terminal, typically a cell phone. And after the fixed hotspot is installed in place, the fixed hotspot is electrified to automatically exchange data with the positioning terminal, and the background program takes the GPS coordinate of the positioning terminal as the coordinate of the fixed hotspot and displays the coordinate on the electronic map. The mobile hotspot can perform GPS positioning in real time and can be directly added into the system. The fixed hot spot and the mobile hot spot jointly form a positioning network, and the fast positioning coverage of the blank area is realized.

Furthermore, the invention allows only mobile hot spots in the system, namely a plurality of mobile phones to form a positioning network, so as to form a mobile group positioning system. The mobile phone supports two public frequency bands of WiFi and bluetooth and is suitable for corresponding beacons. After the corresponding APP is installed on the mobile phone, the signal of the beacon is received, then the GPS coordinate and the beacon ID code of the mobile phone are sent to the background server through the wireless broadband, and the real-time positioning of the beacon is completed. The group positioning network comprises fixed equipment and mobile equipment, so that the group positioning network has excellent expansibility, can quickly cover the inside of a building or a blank area with weak satellite signals, effectively makes up the technical defects of a GPS (global positioning system), and provides possibility for indoor and outdoor positioning service in seamless butt joint.

(IV) advantageous effects

The invention is a mobile group positioning system with a brand new concept, a positioning network is formed by a fixed receiver and a mobile phone together, the network expansibility is good, the temporary and rapid deployment is convenient, an indoor and outdoor seamless butt joint positioning system is formed, the dead angle-free comprehensive coverage is realized, the increasing positioning service requirements are met, and the system is particularly suitable for people group monitoring, children search and pet retrieval.

(V) description of the drawings

The present invention will be described with reference to the accompanying drawings, wherein fig. 1 is a sensor and system configuration diagram of the present invention, fig. 2 is an indoor positioning network diagram of the present invention, fig. 3 is an outdoor positioning network diagram of the present invention, and fig. 2 and 3 are two embodiments of the present invention, which are respectively used for indoor and outdoor networks.

Fig. 1 illustrates a sensor and system structure required by the present invention, and a beacon 1 is a simple wireless signal source, uses a common frequency band, sends an ID code unidirectionally and regularly, has an adjustable sending frequency, does not receive a signal, and does not include positioning components such as GPS or beidou. The different beacons have respective specific ID codes, which serve to give the located object a unique identity. The receiver receives the beacon signal and is divided into two types, namely a fixed hotspot 2 and a mobile hotspot 3. The fixed hotspot 2 does not contain a GPS component, and its initial position is given by the handheld positioning terminal according to the GPS coordinates of the positioning terminal. After the fixed hotspot 2 is installed and powered on, data are automatically exchanged with the positioning terminal, and the background program takes the GPS coordinate of the positioning terminal as the coordinate of the receiver and displays the coordinate on the electronic map. The mobile hotspot 3 can be a mobile phone or a receiver with a GPS component, and can be temporarily added into a positioning network to realize the rapid expansion of the network. The signal strength of the beacon 1 is specially designed, the beacon can be recognized by a receiver within a radius range of 0-30 meters, and after the beacon exceeds the designed range, the receiver filters weak signals and considers the weak signals as not received.

The fixed hotspot 2 and the mobile hotspot 3 jointly form a complete positioning network, and the network comprises permanent equipment and temporary equipment, so that the reliability and the flexibility are both considered. The fixed hotspot 2 and the mobile hotspot 3 both comprise communication modules, and can send the received data such as the ID code to the base station 4, and then transmit the data to the server 5 through a data network of a mobile phone service provider. The server 5 includes a background program, and after the background program confirms the ID code of the beacon, the GPS coordinate of the receiver that receives the signal is displayed on the electronic map as the position of the beacon, thereby completing the positioning of the beacon.

The invention also can use a plurality of receivers to receive signals, simultaneously transmit ID codes and signal intensity to the server, and more accurately calculate the position of the beacon by a multipoint positioning algorithm according to the positions of different receivers.

Fig. 2 illustrates the indoor network operating principle of the system. The building is inside to have a large amount of partition walls, and the personnel can only be done horizontal migration through the corridor, through the elevator or the floor of stair difference from top to bottom, and the quantity of setpoint can effectively be reduced in the pertinence design. The system is provided with node receivers 6 in the staircases and the elevator rooms for identifying the vertical movement of personnel, orientation receivers 7 in the corridors, spacing distances are set according to positioning accuracy for identifying the horizontal movement of the personnel, position receivers 8 are arranged in the rooms for identifying the rooms in which the personnel are, and the receivers with different functions form a positioning network, so that the comprehensive coverage of indoor positioning is realized. The beacon 1 is close to a receiver, and the signal is identified by the receiver, so that the specific position of a person in the building can be determined in real time.

Fig. 2 is also an embodiment of a firefighter location project, with receivers pre-set for fire scene direction. The node receiver 6 monitors the upper and lower floors of the team member, and the azimuth receiver 7 monitors the horizontal movement of the team member, thereby forming a basic positioning network. The location receiver 8 is only installed in a large room with a crowd gathering, the key area is monitored, and the secondary room can be omitted. In case of fire, the smoke may be large, and the team member carries the beacon to move horizontally up and down the stairway and along the corridor, so that the position of the team member in the room can be found in real time, and the crowd can reach the large room quickly. The commander can also master the distribution of team members on different floors fast, and high-efficient commander is put out a fire and is evacuated.

Fig. 3 illustrates the outdoor network operating principle of the system. The fixed hotspot 2 is a permanent device installed in a community, is positioned at an entrance and an exit of the community, a turning point of a road and a public activity place, and forms a basic positioning network by the main activity streamline of people in a coverage area. The mobile hotspot 3 is a mobile phone temporarily arranged or a receiver with a GPS component, and can quickly expand the coverage of a positioning network for temporary positioning requirements. The positioning object carries the beacon 1 with the person, and when the positioning object moves in the area, the signal is identified by different types of receivers, so that the specific position of the beacon is determined in real time. In general, a basic positioning network can meet the requirement, and if a specific address needs to be positioned, a mobile hotspot 3 needs to be temporarily installed at a unit doorway or at home.

FIG. 3 is also an example of home isolation of infectious diseases, where a person is in close contact and needs home isolation. The manager requires the manager to wear the beacon 1 for 24 hours, and at the same time, a mobile phone is temporarily arranged at home to serve as a mobile hotspot 3, and the mobile phone continuously receives the signal, so that the manager can confirm that the manager does not leave the home. Permanent fixed hot spots 2 are arranged on the community entrance and the community road, if signals are received, it is shown that a person is ready to leave the community, early warning can be timely carried out, manual interception is reminded, and the problem of automatic isolation is well solved.

Claims

1. An outdoor/indoor positioning system based on wireless beacon tracking, a plurality of signal receivers form a positioning network, the receivers can be preset in advance and can also be deployed temporarily, wireless beacons send ID codes in a unidirectional and timed mode, background programs analyze the ID codes received by different receivers, and the positions of the beacons are determined according to position coordinates of the receivers, and the system is characterized in that:

the receiver is divided into a fixed hot spot and a mobile hot spot, and the fixed hot spot and the mobile hot spot form a positioning network together, the fixed hot spot does not contain a GPS component, the initial position of the fixed hot spot is given by a handheld positioning terminal according to the GPS coordinate of the positioning terminal, and the mobile hot spot can be a mobile phone or a receiver with the GPS component and can be temporarily added into the positioning network;

in the indoor positioning network, node receivers are arranged in a staircase and an elevator room and used for identifying the vertical movement of personnel, a direction receiver is arranged in a corridor, the spacing distance is set according to the positioning accuracy and used for identifying the horizontal movement of the personnel, and a position receiver is arranged in a room and used for identifying the room in which the personnel are positioned;

in the outdoor positioning network, fixed hotspots are installed at community entrances and exits, turning points of roads and public activity places to form a basic positioning network, and mobile hotspots are temporarily arranged mobile phones or receivers with GPS components, so that the coverage of the positioning network can be rapidly expanded.

2. The outdoor/indoor positioning system as claimed in claim 1, wherein the beacon is a simple wireless signal source, uses a common frequency band, sends out ID codes unidirectionally and regularly, the frequency of the signaling is adjustable, and does not receive signals and does not contain positioning components such as GPS or beidou.

3. The outdoor/indoor positioning system as claimed in claim 1, wherein the signal strength of the beacon is designed to be recognized by the receiver within a radius of 0-30 m, and when the signal strength exceeds the designed range, the receiver filters out weak signals and considers them as not received.

4. The outdoor/indoor positioning system as claimed in claim 1, wherein the fixed hotspot and the mobile hotspot each comprise a communication module capable of transmitting data such as a received ID code to the base station and then to the server through a data network of a cellular service provider.

5. The outdoor/indoor positioning system as claimed in claim 1, wherein the server comprises a background program, the background program confirms the ID code of the beacon and displays the GPS coordinate of the receiver receiving the signal as the position of the beacon on the electronic map to complete the positioning of the beacon.

6. The outdoor/indoor positioning system as claimed in claim 1, wherein a plurality of receivers are also used to receive signals, and the ID code and signal strength are transmitted to the server at the same time, and the position of the beacon is calculated more accurately by the multipoint positioning algorithm according to the positions of the different receivers.