High-precision positioning system and method based on low-orbit satellite communication link driving

Abstract

The invention relates to the technical field of satellite navigation and positioning, in particular to a high-precision positioning system and method based on low-orbit satellite communication link driving, and the system comprises a sensor module which is used for obtaining the acceleration information and angular velocity information of a target body; the microprocessor module is used for receiving, analyzing and processing the initial position information, receiving acceleration information and angular velocity information of the target body at the same time, and determining accurate position information of the target body based on the analyzed and processed initial position information and the acceleration information and angular velocity information of the target body; the communication module is used for transmitting the accurate position information to a low-orbit satellite communication link and transmitting a control instruction of the low-orbit satellite communication link to the microprocessor module, the system is not only suitable for safety monitoring of vulnerable groups such as children, old people and cognitive impairment groups, but also can be applied to multiple fields such as emergency rescue, outdoor sports and limit exploration, and the system is suitable for popularization and application. The application scene is expanded, and the requirements of different user groups are met.

Description

Technical Field

[0001] This invention relates to the field of satellite navigation and positioning technology, and more specifically, to a high-precision positioning system and method driven by a low-Earth orbit satellite communication link. Background Technology

[0002] Foreign satellite positioning wearable devices mostly rely on terrestrial mobile networks (such as 2G / 4G) for data transmission. Traditional anti-wandering locators, for example, cannot function in areas without network coverage (mountainous areas, oceans, disaster sites), are susceptible to signal shielding or interference, and suffer from poor positioning stability. Early network-independent BeiDou satellite positioning anti-wandering devices, such as handheld or backpack-integrated devices, are still bulky and unsuitable for long-term wear, with short battery life (1-3 days) requiring external power, limiting their application in daily monitoring scenarios. Lightweight wearable positioning patches offer a positioning accuracy of approximately 50 meters, insufficient for high-precision requirements, and have limitations for scenarios requiring precise positioning, such as life detection in rubble. While medical flexible electronics technology has made progress in biocompatible silicone materials and self-powered technology, the high power consumption of satellite communication and a battery life of only 24-48 hours limit its sustainability in practical applications. Current research focuses primarily on medical monitoring and emergency rescue, with relatively little development for consumer market applications. The safety needs of groups such as outdoor athletes and extreme adventurers have not yet been fully met. Summary of the Invention

[0003] In view of this, the present invention addresses the shortcomings of the prior art by proposing a high-precision positioning system and method based on low-orbit satellite communication link, aiming to solve at least one of the problems mentioned in the background art.

[0004] First aspect: This invention provides a high-precision positioning system driven by a low-orbit satellite communication link, comprising: a BeiDou and low-orbit satellite positioning module, used to receive satellite signals and calculate preliminary location information; The sensor module is used to acquire the acceleration and angular velocity information of the target object; The microprocessor module is used to receive and analyze the preliminary position information, and simultaneously receive the acceleration and angular velocity information of the target body, and determine the precise position information of the target body based on the analyzed preliminary position information and the acceleration and angular velocity information of the target body; The communication module is used to transmit the precise location information to the low-Earth orbit satellite communication link and to transmit the control commands of the low-Earth orbit satellite communication link to the microprocessor module. The power management module, the BeiDou and low-orbit satellite positioning module, the sensor module, the microprocessor module, and the communication module are electrically connected.

[0005] In some embodiments, the satellite signals include BeiDou satellite signals and low-Earth orbit satellite signals.

[0006] In some embodiments, the sensor module includes a MEMS accelerometer and a MEMS gyroscope.

[0007] In some embodiments, the power management module includes a micro generator and a battery, the micro generator being electrically connected to the battery, and the battery, the BeiDou and low-orbit satellite positioning module, the sensor module, the microprocessor module, and the communication module being electrically connected.

[0008] Secondly, this invention provides a high-precision positioning method based on low-Earth orbit satellite communication link, comprising the following steps: S1. Calculate the preliminary position information of the target object using a satellite positioning algorithm; S2. Correct the initial position information of the target object through the inertial navigation system algorithm and output the accurate position information.

[0009] In some embodiments, the calculation of the preliminary position information of the target body by the satellite positioning algorithm in step S1 includes: receiving pseudorange, satellite ephemeris data and satellite clock deviation from at least 4 satellites, and outputting the preliminary position information of the target body based on the pseudorange, satellite ephemeris data and satellite clock deviation.

[0010] In some embodiments, the step S2, which corrects the preliminary position information of the target object using an inertial navigation system algorithm to output precise position information, includes: preprocessing the acceleration and angular velocity information of the target object and combining it with the absolute position information of the target object received by the BeiDou and low-orbit satellite positioning modules. Eliminate cumulative error.

[0011] In some embodiments, the preprocessing of the target's acceleration and angular velocity information includes: Acceleration information is ; Convert acceleration information into relative acceleration of the target body: in: It is the acceleration due to gravity. The pitch angle, This refers to the roll angle; Integrating the relative acceleration yields the change in velocity of the target body: in , , The initial velocity; Integrating the velocity, we obtain the change in displacement of the target body: Update the target's position: .

[0012] In some embodiments, the preprocessing of the target's acceleration and angular velocity information further includes: Angular velocity information is ; Integrating the angular velocity yields the attitude change: in , , , where is the initial attitude angle.

[0013] In some embodiments, the target absolute position information received by the BeiDou and low-orbit satellite positioning modules is combined Eliminating accumulated errors includes: Calculate the difference between the updated position information and the absolute position information of the target body: The difference is fed back into the inertial navigation system algorithm for error correction. Simultaneously based on the target's absolute position information The initial attitude angle is updated using the Kalman filter algorithm, and the updated initial attitude angle is then input into the inertial navigation system algorithm for error correction.

[0014] Compared with existing technologies, the beneficial effects of this invention are as follows: It utilizes BeiDou satellite communication for location transmission, eliminating reliance on terrestrial networks. It can operate stably in special scenarios such as areas without network coverage, extreme environments, and communication blind spots, overcoming the limitations of traditional equipment's dependence on terrestrial networks and improving the adaptability and availability of the equipment. By employing contactless technology, flexible electronics, and self-powered technology, it utilizes the mechanical energy of human movement, converting it into electrical energy through a micro-generator or piezoelectric materials for storage, providing continuous power for daily activities, reducing reliance on traditional batteries, and extending battery life. It incorporates a built-in solar thin-film battery, which can be charged using natural light or indoor light, accumulating charge even in low-light conditions to meet low-power consumption needs, increasing power replenishment methods to extend battery life. It selects low-power chips and sensors, such as the low-power mode of the BeiDou positioning and communication module, optimizes circuit design to reduce current loss, lowers hardware energy consumption, and dynamically adjusts power consumption according to the device's usage status (positioning frequency, data transmission requirements, etc.). It reduces frequency and power when stationary or at low risk, and increases power consumption during frequent activity or... To enhance power during high-risk situations and extend battery life while maintaining functionality, this device utilizes a high-energy-density lithium polymer battery. This battery boasts advantages such as small size, light weight, and long cycle life, making it suitable for wearable devices. Optimized packaging and management systems ensure safety and stability, storing more power. An advanced battery management system monitors battery level and health status, rationally allocating stored energy from bio-kinetic energy conversion and ambient light charging to avoid waste and improve energy utilization. An ultra-thin (<1mm) stretchable silicone patch has been developed, providing a comfortable fit against the skin and extending battery life to over 7 days, meeting the needs of extended wear. This addresses the shortcomings of existing devices, such as bulkiness, inconvenience, and short battery life, improving user experience and device practicality. Employing dual-mode positioning with BeiDou + low-orbit satellites, accuracy is improved to 1-5 meters, supporting real-time trajectory tracking. Compared to existing devices, this represents a significant improvement in positioning accuracy, better meeting high-precision positioning needs, such as life detection in rubble, and providing more precise support for emergency rescue scenarios.

[0015] The above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0016] Other features and aspects of this disclosure will become clearer from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1This is a functional block diagram of a high-precision positioning system driven by a low-orbit satellite communication link, provided for an embodiment of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] See Figure 1 As shown, the first embodiment: A high-precision positioning system based on a low-Earth orbit satellite communication link, according to an embodiment of this application, includes: The BeiDou and low-orbit satellite positioning module is used to receive satellite signals and calculate preliminary location information; The sensor module is used to acquire the acceleration and angular velocity information of the target object; The microprocessor module is used to receive and analyze the preliminary position information, and simultaneously receive the acceleration and angular velocity information of the target body, and determine the precise position information of the target body based on the analyzed preliminary position information and the acceleration and angular velocity information of the target body; The communication module is used to transmit the precise location information to the low-Earth orbit satellite communication link and to transmit the control commands of the low-Earth orbit satellite communication link to the microprocessor module. The power management module, the BeiDou and low-orbit satellite positioning module, the sensor module, the microprocessor module, and the communication module are electrically connected.

[0024] In some specific embodiments, the satellite signals include BeiDou satellite signals and low-Earth orbit satellite signals.

[0025] In some specific embodiments, the sensor module includes a MEMS accelerometer and a MEMS gyroscope.

[0026] It should be understood that MEMS accelerometers integrate miniature masses, springs, and capacitance detection onto a single chip using microelectromechanical systems (MEMS) technology, achieving miniaturization and high sensitivity. They can detect minute changes in acceleration (such as tilting or vibration) and are suitable for motion monitoring, navigation, and other applications. MEMS technology allows for integration into miniaturized products such as mobile phones and wearable devices. MEMS accelerometers can simultaneously detect acceleration in the X, Y, and Z directions, supporting three-dimensional motion analysis.

[0027] MEMS gyroscopes can detect rapid changes in angular velocity and are suitable for dynamic attitude tracking.

[0028] In some specific embodiments, the power management module includes a micro generator and a battery, the micro generator being electrically connected to the battery, and the battery, the BeiDou and low-orbit satellite positioning module, the sensor module, the microprocessor module, and the communication module being electrically connected.

[0029] It should be understood that microgenerators convert mechanical energy (such as vibration, rotation, or fluid kinetic energy) into electrical energy to provide continuous power support for the system. They utilize equipment vibration (such as vehicles or machinery) to drive piezoelectric materials or electromagnetic coils to generate electricity. Microgenerators convert mechanical energy into electrical energy, outputting it to a battery or directly powering the system. The battery stores excess electrical energy and releases it when the generator's output is insufficient.

[0030] A second embodiment of a high-precision positioning method based on a low-Earth orbit satellite communication link, according to an embodiment of this application, includes the following steps: S1. Calculate the preliminary position information of the target object using a satellite positioning algorithm; S2. Correct the initial position information of the target object through the inertial navigation system algorithm and output the accurate position information.

[0031] In some specific embodiments, the calculation of the preliminary position information of the target body by the satellite positioning algorithm in step S1 includes: receiving pseudorange, satellite ephemeris data and satellite clock deviation from at least 4 satellites, and outputting the preliminary position information of the target body based on the pseudorange, satellite ephemeris data and satellite clock deviation.

[0032] It should be understood that by geometrically distributing multiple satellites, errors from a single satellite are eliminated, enabling three-dimensional position calculation (longitude, latitude, and altitude). Utilizing pseudorange from at least four satellites, redundant observations suppress errors such as signal blockage and multipath effects. The satellite signal processing speed is fast (millisecond-level), making it suitable for real-time positioning of dynamic targets (such as vehicles and drones). Relying on satellite signals, it is applicable to remote areas without ground infrastructure (such as oceans and deserts). The receiver only needs to passively receive satellite signals, without active transmission, resulting in simple hardware and low power consumption.

[0033] In some specific embodiments, step S2, which corrects the preliminary position information of the target object using an inertial navigation system algorithm to output precise position information, includes: preprocessing the target object's acceleration and angular velocity information, and combining this with the absolute position information of the target object received by the BeiDou and low-orbit satellite positioning modules. Eliminate cumulative error.

[0034] It should be understood that INS measures the acceleration and angular velocity of the target object in real time using accelerometers and gyroscopes, and calculates position and attitude changes through integration based on the initial position and attitude. It does not rely on external signals (such as satellite signals) and is suitable for scenarios where satellite signals are blocked or interrupted (such as tunnels or areas with many tall buildings). Satellite positioning provides an absolute position reference, periodically correcting the accumulated errors of INS (such as zero bias and noise integration), significantly improving long-term navigation accuracy. Even when satellite signals are blocked or interrupted, INS can autonomously maintain high-precision navigation for short periods.

[0035] In some specific embodiments, the preprocessing of the target's acceleration and angular velocity information includes: Acceleration information is ; Convert acceleration information into relative acceleration of the target body: in: It is the acceleration due to gravity. The pitch angle, This refers to the roll angle; Integrating the relative acceleration yields the change in velocity of the target body: in , , The initial velocity; Integrating the velocity, we obtain the change in displacement of the target body: Update the target's position: .

[0036] In some specific embodiments, the preprocessing of the target's acceleration and angular velocity information further includes: Angular velocity information is ; Integrating the angular velocity yields the attitude change: in , , , where is the initial attitude angle.

[0037] In some specific embodiments, the absolute position information of the target body received by the BeiDou and low-orbit satellite positioning modules is combined. Eliminating accumulated errors includes: Calculate the difference between the updated position information and the absolute position information of the target body: The difference is fed back into the inertial navigation system algorithm for error correction. Simultaneously based on the target's absolute position information The initial attitude angle is updated using the Kalman filter algorithm, and the updated initial attitude angle is then input into the inertial navigation system algorithm for error correction.

[0038] It should be understood that the absolute position information of the target is the three-dimensional coordinates of the target in the Earth coordinate system, which are directly calculated after receiving satellite signals through the BeiDou and low-orbit satellite positioning module. This is the absolute position of the target relative to the center of the Earth.

[0039] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A high-precision positioning system driven by a low-Earth orbit satellite communication link, characterized in that, include: The BeiDou and low-orbit satellite positioning module is used to receive satellite signals and calculate preliminary location information; The sensor module is used to acquire the acceleration and angular velocity information of the target object; The microprocessor module is used to receive and analyze the preliminary position information, and simultaneously receive the acceleration and angular velocity information of the target body, and determine the precise position information of the target body based on the analyzed preliminary position information and the acceleration and angular velocity information of the target body; The communication module is used to transmit the precise location information to the low-Earth orbit satellite communication link and to transmit the control commands of the low-Earth orbit satellite communication link to the microprocessor module. The power management module, the BeiDou and low-orbit satellite positioning module, the sensor module, the microprocessor module, and the communication module are electrically connected.

2. The high-precision positioning system based on low-Earth orbit satellite communication link as described in claim 1, characterized in that, The satellite signals include BeiDou satellite signals and low-orbit satellite signals.

3. A high-precision positioning system based on a low-Earth orbit satellite communication link as described in claim 2, characterized in that, The sensor module includes a MEMS accelerometer and a MEMS gyroscope.

4. A high-precision positioning system based on a low-Earth orbit satellite communication link as described in claim 3, characterized in that, The power management module includes a micro generator and a battery. The micro generator is electrically connected to the battery. The battery, the Beidou and low-orbit satellite positioning module, the sensor module, the microprocessor module, and the communication module are electrically connected to each other.

5. A high-precision positioning method based on low-Earth orbit satellite communication link, characterized in that, The high-precision positioning system based on low-Earth orbit satellite communication link as described in any one of claims 1 to 4 includes the following steps: S1. Calculate the preliminary position information of the target object using a satellite positioning algorithm; S2. Correct the initial position information of the target object through the inertial navigation system algorithm and output the accurate position information.

6. A high-precision positioning method based on low-Earth orbit satellite communication link driven according to claim 5, characterized in that, The preliminary position information of the target body calculated by the satellite positioning algorithm in step S1 includes: receiving pseudorange, satellite ephemeris data and satellite clock deviation from at least 4 satellites, and outputting the preliminary position information of the target body based on the pseudorange, satellite ephemeris data and satellite clock deviation.

7. A high-precision positioning method based on low-Earth orbit satellite communication link driven according to claim 6, characterized in that, In step S2, the initial position information of the target is corrected using an inertial navigation system algorithm to output precise position information. This includes preprocessing the target's acceleration and angular velocity information and combining it with the absolute position information of the target received by the BeiDou and low-orbit satellite positioning modules. Eliminate cumulative error.

8. A high-precision positioning method based on low-Earth orbit satellite communication link driven according to claim 7, characterized in that, The preprocessing of the target's acceleration and angular velocity information includes: Acceleration information is ; Convert acceleration information into relative acceleration of the target body: in: It is the acceleration due to gravity. The pitch angle, This refers to the roll angle; Integrating the relative acceleration yields the change in velocity of the target body: in , , The initial velocity; Integrating the velocity, we obtain the change in displacement of the target body: Update the target's position: 。 9. A high-precision positioning method based on low-Earth orbit satellite communication link as described in claim 8, characterized in that, The preprocessing of the target's acceleration and angular velocity information also includes: Angular velocity information is ; Integrating the angular velocity yields the attitude change: in , , , where is the initial attitude angle.

10. A high-precision positioning method based on low-Earth orbit satellite communication link driven according to claim 9, characterized in that, The target's absolute position information received by the BeiDou and low-orbit satellite positioning modules Eliminating accumulated errors includes: Calculate the difference between the updated position information and the absolute position information of the target body: The difference is fed back into the inertial navigation system algorithm for error correction. Simultaneously based on the target's absolute position information The initial attitude angle is updated using the Kalman filter algorithm, and the updated initial attitude angle is then input into the inertial navigation system algorithm for error correction.

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