Active controllable electromagnetic field pattern positioning system

Abstract

The application provides an active controllable electromagnetic field map positioning system, and belongs to the technical field of positioning and navigation.The system is driven by regional geographic information, is based on an electromagnetic field channel model, and realizes active generation of regional electromagnetic fields by deploying controllable electromagnetic field generating units, so that users observe electromagnetic information and match the observed electromagnetic information with accurately deduced regional electromagnetic field maps to realize positioning.Compared with a radio geometry measurement positioning system, the system can not be affected by network visibility, network topology and multipath error, and has strong adaptability to indoor and underground environments;compared with a common electromagnetic spectrum positioning system, the system changes passive measurement of electromagnetic field distribution to realize positioning into active construction of electromagnetic fields to realize positioning, so that a large amount of measurement data acquisition for database construction is not needed, and the system deployment workload is greatly reduced;on the other hand, the electromagnetic field is actively generated based on the geographic information of a service area, so that spatial full coverage can be determined, and the positioning performance is optimal.

Description

Technical Field

[0001] This invention relates to the field of positioning and navigation technology, and in particular to the design of a high-precision positioning and navigation system that is primarily designed for complex indoor and underground environments. Background Technology

[0002] The demand for high-precision indoor and outdoor positioning services is growing rapidly, prompting domestic and international research institutions to conduct extensive research on indoor positioning technologies. Positioning and navigation technologies for enclosed underground spaces have become a hot topic in the industry.

[0003] Currently, indoor positioning technology lacks standardized applications, leading various research institutions to conduct studies using diverse techniques. This has resulted in various types of indoor positioning systems, including pulse ultra-wideband (UWB), BeiDou pseudosatellite, and near-ultrasonic positioning. Each technique has its own advantages and characteristics. Pulse UWB technology boasts strong indoor multipath resolution, enabling high-precision ranging and positioning in multipath environments, thus achieving widespread application in indoor positioning. However, it also suffers from poor anti-interference capabilities and limited coverage. BeiDou pseudosatellite technology is compatible with satellite navigation systems, facilitating continuous indoor and outdoor positioning. However, its multipath resistance is relatively limited, making it suitable for relatively open indoor underground spaces. Near-ultrasonic positioning technology offers high indoor positioning accuracy and can adapt to complex electromagnetic environments, but it also has weaknesses such as a small positioning range and weak dynamic positioning capabilities. Summary of the Invention

[0004] The purpose of this invention is to achieve high-precision positioning and navigation capabilities adaptable to various complex indoor and underground environments based on pulse ultra-wideband, near-ultrasound, and pseudo-satellite technologies. It proposes an integrated system architecture design and lays the technical foundation for the development of an integrated system.

[0005] The technical solution adopted in this invention is as follows:

[0006] An active controllable electromagnetic field map positioning system includes a system control center, an active controllable electromagnetic field map generation unit, and a user terminal. The control center is responsible for system status management, generating deployment schemes and electromagnetic field generation parameters for the active controllable electromagnetic field map generation unit based on environmental geographic information, pre-generating electromagnetic field map data for the positioning area, and receiving unit information to update the electromagnetic field spectrum online.

[0007] An active controllable electromagnetic field map generation unit integrates one or more radio signal transmission capabilities and generates a controllable electromagnetic field within a certain range to achieve full coverage of the target positioning area;

[0008] The user terminal is used to measure electromagnetic field parameters in the positioning service area and send the data back to the system control center for matching and positioning with electromagnetic field map data.

[0009] The process of regional positioning and navigation is as follows: First, the positioning service area is surveyed and mapped to construct a three-dimensional geographic information map of the service area. Based on the three-dimensional geographic information map of the service area, the system control center generates a deployment plan for the system field map generation unit and parameters for the active field map generation unit to achieve optimal positioning performance, and performs electromagnetic field map deduction. Then, in the service area, the field map generation unit is deployed according to the deployment plan. The active field map generation unit emits electromagnetic signals according to predetermined parameters to generate the electromagnetic field map. The user terminal receives the electromagnetic signals, measures the parameters, and sends them back to the system control center. The system control center matches the electromagnetic signal parameters reported by the user with the electromagnetic spectrum for positioning, and sends the positioning results to the user.

[0010] The main innovative features of this invention are as follows:

[0011] 1. The active controllable electromagnetic field map positioning system architecture proposed in this invention can achieve high-precision positioning capability that adapts to various indoor and outdoor spatial environments.

[0012] 2. Compared to radio geometric measurement and positioning systems, it is not affected by network line of sight, network topology, and multipath errors, and has strong adaptability to indoor and underground environments;

[0013] 3. Compared to conventional electromagnetic spectrum positioning, which relies on passively measuring electromagnetic field distribution to build a spectrum database for positioning, this method actively constructs electromagnetic fields for positioning. On the one hand, it eliminates the need for extensive measurement data collection to build a database, greatly reducing the workload of system deployment. On the other hand, the electromagnetic field is actively generated based on the geographic information of the service area, ensuring full spatial coverage and optimal positioning performance. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a flowchart illustrating an embodiment of the present invention. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] To facilitate the understanding of the technical solution of this patent by those skilled in the art, and to make the technical purpose, technical solution and beneficial effects of this patent clearer, and to fully support the scope of protection of the claims, the technical solution of this patent will be further and more detailed below in the form of specific cases.

[0018] Reference Figure 1 The active controllable electromagnetic field map positioning system in this embodiment includes a system control center, an active controllable electromagnetic field map generation unit, and a user terminal;

[0019] The control center is responsible for system status management. Based on environmental geographic information, it can generate deployment plans and electromagnetic field generation parameters for active and controllable electromagnetic field map generation units, pre-generate electromagnetic field map data for the positioning area, and receive unit information to update the electromagnetic field spectrum online.

[0020] The active controllable electromagnetic field map generation unit can integrate one or more radio signal transmission capabilities (such as WiFi, UWB, satellite navigation pseudo-satellites, etc.). Based on the electromagnetic field generation parameters generated by the control center, it can generate a controllable electromagnetic field within a certain range. Multiple units can achieve full coverage of the positioning service area.

[0021] The user terminal can measure electromagnetic field parameters in the location service area, send the data back to the center, and match it with electromagnetic field map data for positioning.

[0022] The system deployment and operating mode are as follows:

[0023] The location service area is surveyed and mapped to obtain information such as the geometric structure and material of buildings in the service area, and a three-dimensional geographic information map M1 of the service area is constructed.

[0024] Based on the three-dimensional geographic information map of the service area and relying on the precise model of electromagnetic signal spatial propagation, the control center achieves optimal positioning performance and generates a system field map generation unit deployment plan and active field map generation unit parameters. It then performs electromagnetic field map deduction and generates a regional electromagnetic field map M2 that matches the geographic information map.

[0025] Within the service area, field map generation units are deployed according to the deployment plan. The active field map generation units emit electromagnetic signals according to predetermined parameters to achieve electromagnetic field generation coverage.

[0026] The user terminal receives one or more electromagnetic signals generated by the active field diagram generation unit, performs parameter measurements, and transmits the data back to the control center in real time.

[0027] The control center matches and locates the user's position in M1 by matching the electromagnetic signal parameters reported by the user with the regional electromagnetic map M2, and then sends the coordinates to the user via the communication link.

Claims

1. An active and controllable electromagnetic field mapping positioning system, characterized in that, It includes a system control center, an active and controllable electromagnetic field map generation unit, and user terminals. The control center is responsible for system status control, generating deployment plans and electromagnetic field generation parameters for the active and controllable electromagnetic field map generation unit based on environmental geographic information, pre-generating electromagnetic field map data for the positioning area, and receiving unit information to update the electromagnetic field spectrum online. An active controllable electromagnetic field map generation unit integrates one or more radio signal transmission capabilities and generates a controllable electromagnetic field within a certain range to achieve full coverage of the target positioning area; The user terminal is used to measure electromagnetic field parameters in the positioning service area and send the data back to the system control center for matching and positioning with electromagnetic field map data. The process of regional positioning and navigation is as follows: First, the positioning service area is surveyed and mapped to construct a three-dimensional geographic information map of the service area. Based on the three-dimensional geographic information map of the service area, the system control center generates a deployment plan for the system field map generation unit and parameters for the active field map generation unit to achieve optimal positioning performance, and performs electromagnetic field map deduction. Then, in the service area, the field map generation unit is deployed according to the deployment plan. The active field map generation unit emits electromagnetic signals according to predetermined parameters to generate the electromagnetic field map. The user terminal receives the electromagnetic signals, measures the parameters, and sends them back to the system control center. The system control center matches the electromagnetic signal parameters reported by the user with the electromagnetic spectrum for positioning, and sends the positioning results to the user.

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