A system and method for automatically associating vital sign data based on Bluetooth ranging

Abstract

The application provides a vital sign data automatic association system and method based on Bluetooth ranging, wherein the method comprises the following steps: after a portable vital sign collector receives a measurement starting instruction, the portable vital sign collector performs bidirectional Bluetooth ranging with a plurality of fixed beacons, filters out a target beacon with the smallest physical distance, and transmits collected vital sign data to the target beacon; after the target beacon completes validity confirmation on the received vital sign data, the target beacon binds a pre-stored location identifier of the target beacon with the vital sign data, generates binding information, and uploads the binding information to a server, so as to realize automatic association storage of the vital sign data and the location and identity of a patient. The application realizes high-precision location matching through Bluetooth bidirectional ranging technology, can accurately distinguish the fixed beacons of adjacent beds in a patient room, realizes automatic and accurate association of vital sign data, effectively solves the technical problems of low accuracy and poor efficiency of a traditional manual association mode, and is suitable for a medical data collection scene of a hospital with high-density beds.

Description

Technical Field

[0001] This invention relates to the field of medical information technology, and more specifically, to an automatic association system and method for vital sign data based on Bluetooth ranging. Background Technology

[0002] In the field of medical care, especially in densely populated medical environments such as hospital wards, healthcare workers routinely use portable vital sign monitoring devices, such as electronic blood pressure monitors, forehead thermometers, and pulse oximeters, to conduct vital sign measurements on multiple hospitalized patients. Vital sign data serves as the core basis for patient diagnosis and treatment plan development; its precise one-to-one correspondence with patient identity is a crucial prerequisite for ensuring the accuracy of medical information and mitigating medical errors and potential medical risks.

[0003] Currently, during rounds of measurements, medical staff typically use manual transcription: the measurement data is first recorded on paper, and then manually entered into the electronic records upon returning to the nurses' station. This method has two problems: firstly, human errors such as misreading or miswriting are prone to occur during transcription, leading to patient A's data being mistakenly entered into patient B's record, causing data confusion; secondly, transcription and data entry consume a significant amount of nurses' time, reducing nursing efficiency.

[0004] The proposed improvements in existing technologies still have significant shortcomings in the context of close-range, high-density scenarios in actual hospital wards. A common approach is to use a barcode scanning method, where nurses use a nursing PDA to scan the QR code on the patient's wristband and the identification code on the vital signs device, linking the measurement data to the patient's identity. While this method avoids manual transcription, the operation is cumbersome, requiring nurses to simultaneously hold the PDA and the vital signs device, scanning multiple times, which is time-consuming. The efficiency improvement is limited when measuring multiple patients, and it fails to effectively reduce the nurses' workload.

[0005] Another approach uses the Received Signal Strength Indicator (RSSI) of traditional Bluetooth technology for coarse distance determination, thereby linking data with patient identity. However, the RSSI value is easily affected by various factors such as environmental interference, obstacles, and human presence, resulting in positioning accuracy only reaching the meter level. In hospital wards, the distance between adjacent beds is typically less than 1-2 meters. This approach cannot reliably distinguish adjacent beds in such close-range, high-density scenarios, making it difficult to accurately and automatically link vital sign data with patient identity, and thus failing to solve the core problem of data ambiguity.

[0006] A patent search revealed invention patent CN117503077A, which discloses a medical vital signs acquisition system and method. This system includes a measuring device, a bed terminal, and a service backend connected in sequence. The measuring device sends a Bluetooth RSSI signal to the bed terminal. The bed terminal converts the scanned Bluetooth RSSI signal into device information and sends both the device information and the Bluetooth RSSI signal to the service backend. The service backend authenticates the device connection based on the device information and calculates the physical distance between the bed terminal and the measuring device based on the Bluetooth RSSI signal. If the device connection authentication is successful and the distance is within a preset range, a connection is established between the measuring device and the bed terminal. This patent relies on RSSI signal ranging, which is susceptible to environmental interference. The centralized distance calculation by the service backend results in a slow response time. Furthermore, it lacks a clear data-location / patient binding mechanism, making data confusion likely.

[0007] In summary, given the problems of the existing technologies, researching an automatic correlation system and method for vital sign data based on Bluetooth ranging has become a critical task that urgently needs to be addressed. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the purpose of this invention is to provide an automatic association system and method for vital sign data based on Bluetooth ranging.

[0009] According to the present invention, an automatic correlation system for vital sign data based on Bluetooth ranging is provided, comprising: a portable vital sign acquisition device, multiple fixed beacons deployed at preset locations, and a server; The portable vital signs acquisition device is wirelessly connected to fixed beacons via Bluetooth. It is used to collect vital signs data and to perform two-way ranging with fixed beacons to obtain physical distance. Based on the physical distance with each fixed beacon, it can determine the target beacon from multiple fixed beacons and send the collected vital signs data to the target beacon. Fixed beacons are used to receive vital sign data from portable vital sign acquisition devices when they are identified as target beacons, bind their pre-stored location identifiers to the vital sign data, and send the bound information to the server. The server connects to the fixed beacon via a wired or wireless network to receive and store the bound information.

[0010] Preferably, the process of the portable vital signs acquisition device to determine the target beacon includes: designating the fixed beacon corresponding to the minimum physical distance among all fixed beacons as the nearest beacon; and determining whether the physical distance value corresponding to the nearest beacon is less than or equal to a preset distance threshold. If so, the nearest beacon is determined as the target beacon.

[0011] Preferably, the fixed beacon includes a display unit and an input unit; the fixed beacon, which is identified as the target beacon, is also used to drive the display unit to display a prompt message indicating that vital signs measurement can begin before receiving vital signs data, and to display the received vital signs data through the display unit after receiving vital signs data, and to receive a manual confirmation signal through the input unit.

[0012] This invention also provides an automatic association method for vital sign data based on Bluetooth ranging. The method, based on the aforementioned automatic association system for vital sign data based on Bluetooth ranging, includes the following steps: Step S1: The portable vital signs acquisition device receives the measurement start command, performs Bluetooth ranging with multiple fixed beacons, and obtains the physical distance with each fixed beacon; each fixed beacon has a unique location identifier; Step S2: The portable vital signs acquisition device determines the target beacon from multiple fixed beacons based on the physical distance; Step S3: The portable vital signs acquisition device collects vital signs data of the target object; Step S4: The portable vital signs acquisition device sends vital signs data to the target beacon; Step S5: The target beacon receives vital sign data and binds its own location identifier to the vital sign data to generate the bound information; In step S6, the target beacon sends the bound information to the server.

[0013] Preferably, in step S1, Bluetooth ranging includes: a ranging request being initiated by a portable vital signs acquisition device or a ranging request being initiated by a fixed beacon.

[0014] Preferably, in step S2, the process of determining the target beacon includes: the portable vital signs acquisition device associating the physical distance with each fixed beacon and the corresponding location identifier to form a candidate distance set; determining the fixed beacon with the smallest physical distance value from the candidate distance set, and recording it as the nearest beacon; and determining whether the physical distance value corresponding to the nearest beacon is less than or equal to a preset distance threshold. If so, the nearest beacon is determined as the target beacon; if not, the association process is terminated and an abnormal prompt is generated.

[0015] Preferably, when multiple fixed beacons in the candidate distance set have the same physical distance value and are all the minimum value, the portable vital signs acquisition device re-executes the distance measurement. If after a preset number of consecutive re-measurements, the physical distance values ​​corresponding to multiple fixed beacons are still the same and are all the minimum value, the measurement is confirmed to be invalid and the process is terminated, generating an error message.

[0016] Preferably, the fixed beacon includes a display unit and an input unit. After step S2 and before step S3, the fixed beacon identified as the target beacon drives the display unit to display a prompt message indicating that vital signs can be measured.

[0017] Preferably, step S5 includes the following sub-steps: Step S5.1: The target beacon receives vital sign data and performs a confirmation operation on the vital sign data; the confirmation operation includes any one of the following three methods: Manual confirmation method: The target beacon drives its display unit to display the received vital signs data, and receives a manual confirmation signal through the input unit to confirm that the vital signs data is valid; Automatic confirmation method: The target beacon determines whether the vital signs data meet the preset automatic confirmation conditions. If they do, the vital signs data are automatically confirmed as valid. Local verification method: The target beacon performs local validity verification on the received vital signs data. If the verification passes, the vital signs data is confirmed to be valid. Step S5.2: After the vital signs data are confirmed to be valid, the target beacon binds its own location identifier with the vital signs data and generates the bound information.

[0018] Preferably, after step S6, the method further includes: the server sending the received bound information to the mobile terminal; the mobile terminal receiving an externally input confirmation command and returning it to the server; and the server, in response to the confirmation command, associating and storing the vital signs data with the location identifier.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. This application uses Bluetooth wireless ranging to achieve centimeter-level ranging accuracy. It can clearly distinguish the fixed beacons corresponding to different beds in close-range, high-density scenarios where the distance between adjacent beds in hospital wards is less than 1-2 meters. This solves the technical problem of traditional solutions being unable to reliably distinguish adjacent beds due to insufficient positioning accuracy, which leads to data association errors. It ensures the accuracy of the association between vital sign data and the corresponding patient identity.

[0020] 2. In this application, medical staff only need to activate the portable vital signs acquisition device next to the target patient to complete the measurement operation. The system can automatically complete the subsequent data matching, binding and uploading work, without the need for medical staff to manually enter or confirm the association, which simplifies the nursing operation process and effectively improves the work efficiency of mobile measurement and data entry.

[0021] 3. This application achieves this solely through wireless communication between the portable vital signs acquisition device and the fixed beacon, eliminating the need for additional physical contact between the patient and medical staff. This reduces the risk of cross-infection and avoids the difficulties of contact-based operations for patients with limited mobility or impaired consciousness, thereby improving the convenience and hygiene of the operation.

[0022] 4. This application automatically completes ranging, target beacon screening, data binding and uploading by machine, effectively avoiding problems such as human transcription errors, memory bias, and incorrect identity selection caused by negligence of medical staff, significantly reducing the probability of confusion between vital sign data and patient identity, improving the accuracy of medical data, and reducing medical risks caused by data errors. Attached Figure Description

[0023] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a flowchart of an automatic association method for vital sign data based on Bluetooth ranging, as described in an embodiment of the present invention. Detailed Implementation

[0024] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0025] This application provides an automatic association system and method for vital sign data based on Bluetooth ranging. The method includes a portable vital sign data acquisition device receiving a measurement start command and performing bidirectional Bluetooth ranging with multiple fixed beacons to obtain the physical distance and unique location identifier corresponding to each fixed beacon, forming a candidate distance set. Based on the candidate distance set, the nearest beacon with the smallest physical distance is selected. If the physical distance of this nearest beacon is less than or equal to a preset distance threshold, it is determined as the target beacon; otherwise, the association process is terminated and an error message is generated. After determining the target beacon, the portable vital sign data acquisition device collects the vital sign data of the target object and transmits the data to the target beacon. After the target beacon verifies the validity of the received vital sign data, it binds its pre-stored location identifier with the vital sign data, generates binding information, and uploads it to a server, realizing the automatic association and storage of vital sign data with the patient's location and identity. This application achieves high-precision location matching through Bluetooth two-way ranging technology, which can accurately distinguish fixed beacons of adjacent beds in the ward, realize the automatic and accurate association of vital sign data, effectively solve the technical problems of low accuracy and poor efficiency of traditional manual association methods, and is suitable for medical data collection scenarios with high density of beds in hospitals.

[0026] Example 1: This embodiment provides an automatic vital sign data association system based on Bluetooth ranging. The example used is a hospital ward where nursing staff use a portable Bluetooth blood pressure monitor to measure the blood pressure of patients in different beds. The portable vital sign data acquisition device includes devices with vital sign acquisition and wireless communication functions, such as forehead thermometers, ear thermometers, blood pressure monitors, finger pulse oximeters, or multi-parameter data acquisition devices; it is powered by dry cell batteries or rechargeable lithium batteries; the fixed beacon is a smart gateway, bedside screen, or bedside screen with Bluetooth communication function. This embodiment uses a portable Bluetooth blood pressure monitor as an example, but this does not constitute a limitation on the scope of protection.

[0027] Specifically, the Bluetooth-based automatic correlation system for vital sign data includes: at least one portable vital sign acquisition device, multiple fixed beacons deployed at preset locations, and a backend server.

[0028] The portable vital signs data acquisition device connects wirelessly to each fixed beacon via Bluetooth to collect vital signs data and perform two-way ranging with the fixed beacons to obtain physical distances. Based on the physical distances to the fixed beacons, it identifies the target beacon from multiple fixed beacons and transmits the collected vital signs data to the target beacon. The fixed beacon, when identified as the target beacon, receives the vital signs data from the portable vital signs data, binds its pre-stored location identifier to the vital signs data, and sends the bound information to the server. The server connects to the fixed beacon via a wired or wireless network to receive and store the bound information.

[0029] In this embodiment, the portable vital signs acquisition device is a portable electronic blood pressure monitor, whose hardware components include a first central processing unit, a vital signs sensor, a first wireless ranging module, a power supply module, and a user interface.

[0030] The first central processing unit serves as the control core, coordinating the work of various modules, performing distance calculations, and determining target beacons.

[0031] The vital signs sensor is used to measure vital signs. In this embodiment, the vital signs sensor includes a blood pressure measurement module consisting of an air pump, an air valve, and a pressure sensor, used to measure the patient's systolic and diastolic blood pressure.

[0032] The first wireless ranging module is used for wireless ranging and data communication with a fixed beacon. This first wireless ranging module is a Bluetooth module that supports the channel detection function defined in Bluetooth 6.0 core specifications and above. Under the control of the first central processing unit, it can perform phase-based wireless ranging with other Bluetooth devices that also support this function, with ranging accuracy down to the centimeter level.

[0033] The power module supplies power to the device; in this embodiment, a rechargeable lithium battery is used.

[0034] The user interface is for user operation. In this embodiment, a start measurement button and a status indicator screen are used.

[0035] The process of a portable vital signs acquisition device to determine a target beacon includes: designating the fixed beacon corresponding to the minimum physical distance among all fixed beacons as the nearest beacon; and determining whether the physical distance value corresponding to the nearest beacon is less than or equal to a preset distance threshold. If so, the nearest beacon is determined as the target beacon.

[0036] In this embodiment, fixed beacons are installed at the head or side wall of each bed. Each fixed beacon is pre-configured with a unique identifier within the hospital to uniquely identify its geographical location. For example, the identifier uses a string in the format of "ward number-room number-bed number", where 0301-1 represents bed number 1 in ward 3.

[0037] The fixed beacon includes a display unit and an input unit; the fixed beacon, which is identified as the target beacon, is also used to drive the display unit to display a prompt message indicating that vital signs measurement can begin before receiving vital signs data, and to display the received vital signs data through the display unit after receiving vital signs data, and to receive a manual confirmation signal through the input unit.

[0038] Specifically, the fixed beacon is a Bluetooth bedside device, whose hardware components include a second central processing unit, a second wireless ranging module, a network communication module, a display unit, an input unit, and a power interface.

[0039] The second central processing unit serves as the control core, used to respond to ranging requests, process received data, and control display and input.

[0040] The second wireless ranging module is used to respond to ranging requests from the portable vital signs acquisition device and complete the ranging process. This second wireless ranging module is also a Bluetooth module that supports Bluetooth channel detection and is used in conjunction with the first wireless ranging module.

[0041] The network communication module is used to connect the device to the hospital's internal network to communicate with the server. In this embodiment, a Wi-Fi module or an Ethernet interface is used.

[0042] The display unit is used to display the received vital signs data and confirmation prompts. In this embodiment, a segmented LCD screen, a dot matrix OLED screen, or an LCD screen is used.

[0043] The input unit is for medical staff to manually confirm data, and uses multiple physical buttons or virtual buttons.

[0044] The power interface connects to the hospital's power supply system to provide stable power to the equipment.

[0045] The server is deployed in the hospital's data center and runs specific applications. The server pre-stores a mapping table that establishes a correspondence between the unique location identifier of each fixed beacon and the information of the patient currently admitted to that bed. Patient information includes the patient's ID and name. This mapping table is dynamically updated based on events such as patient admission, bed transfer, and discharge.

[0046] The server is also configured to receive information from the fixed beacon after binding, parse out the location identifier, query the mapping table to find the corresponding patient, and store the vital signs data in the patient's electronic medical record.

[0047] To handle high-concurrency scenarios, the server employs a time-range-based locking mechanism (e.g., locking based on the bed number as the primary key) when performing write operations to ensure the atomicity and consistency of data writes.

[0048] Example 2: This embodiment provides another automatic association system for vital sign data based on Bluetooth ranging. The difference between this system and Embodiment 1 is that the distance calculation and target beacon determination are uniformly executed by the server.

[0049] Specifically, after a nurse presses the measurement button on the portable Bluetooth blood pressure monitor, the monitor broadcasts a distance trigger signal (containing its own unique identifier). Upon receiving this trigger signal, all fixed beacons in the ward independently perform bidirectional distance measurement with the blood pressure monitor based on Bluetooth Channel Probe (CS), calculating the physical distance between themselves and the monitor. Subsequently, each fixed beacon packages its location identifier, the blood pressure monitor's identifier, and the calculated distance value and reports it to the server.

[0050] After collecting distance reports from multiple fixed beacons, the server executes a decision logic: it selects the fixed beacon with the smallest distance value and determines whether this minimum value is less than or equal to a preset threshold (e.g., 0.5 meters). If the decision passes, the server designates this fixed beacon as the target beacon and sends a command to the blood pressure monitor to establish a data connection with the target beacon (the server can relay this command through the target beacon or directly through another communication channel).

[0051] The blood pressure monitor then sends the measured blood pressure data to the target beacon. After the target beacon completes data binding, it uploads the data to the server for storage. The remaining procedures are the same as in Example 1, and will not be described again in this example.

[0052] Example 3: This embodiment provides an automatic association method for vital sign data based on Bluetooth ranging, which is implemented on top of the automatic association system for vital sign data based on Bluetooth ranging in Embodiment 1. That is, those skilled in the art can understand the automatic association method for vital sign data based on Bluetooth ranging as the operation mode of the automatic association system for vital sign data based on Bluetooth ranging.

[0053] This embodiment uses a scenario in a hospital ward where nursing staff use a portable Bluetooth blood pressure monitor to measure the blood pressure of patients in different beds as an example for detailed explanation.

[0054] Figure 1 This is a flowchart of an automatic association method for vital sign data based on Bluetooth ranging, as described in an embodiment of the present invention.

[0055] like Figure 1 As shown, the automatic association method for vital sign data based on Bluetooth ranging includes the following steps: Step S1: The portable vital signs acquisition device receives the measurement start command, performs Bluetooth ranging with multiple fixed beacons, and obtains the physical distance with each fixed beacon; each fixed beacon has a unique location identifier used to identify its physical location.

[0056] Specifically, in step S1, Bluetooth ranging includes: a ranging request being initiated by a portable vital signs acquisition device or a ranging request being initiated by a fixed beacon.

[0057] Among them, the ranging request initiated by the portable vital signs acquisition device includes: the portable vital signs acquisition device broadcasts a ranging request signal, the fixed beacon receives the signal and replies with a response signal, and the portable vital signs acquisition device calculates the physical distance based on the response signal.

[0058] The process of a fixed beacon actively initiating a ranging request includes: the fixed beacon broadcasting a ranging request signal; the portable vital signs acquisition device receiving the signal and replying with a response signal; and the fixed beacon calculating the physical distance based on the response signal and sending the result to the portable vital signs acquisition device.

[0059] In this embodiment, after the nurse presses the measurement button on the blood pressure monitor, the central processing unit of the blood pressure monitor receives the measurement start command and controls the first wireless ranging module to broadcast a ranging request signal to the surrounding area, and performs wireless ranging with multiple fixed beacons respectively. The specific process of wireless ranging is as follows: the blood pressure monitor broadcasts the ranging request signal, and after all fixed beacons in and around the ward receive the ranging request signal, their second wireless ranging modules respond to the ranging request signal and perform ranging based on linear frequency modulation spread spectrum (CS) with the first wireless ranging module of the blood pressure monitor. The propagation time of the signal in the air is obtained through multi-tone phase measurement or phase slope calculation, and then the physical distance between the blood pressure monitor and itself is calculated.

[0060] Step S2: The portable vital signs acquisition device determines the target beacon from multiple fixed beacons based on the physical distance.

[0061] Specifically, determining the target beacon involves: the central processing unit of the blood pressure monitor associating the physical distance of each fixed beacon with its corresponding location identifier to form a candidate distance set; determining the fixed beacon with the smallest physical distance value from the candidate distance set, which is then recorded as the nearest beacon; and determining whether the physical distance value corresponding to the nearest beacon is less than or equal to a preset distance threshold. If so, the nearest beacon is determined as the target beacon; otherwise, the association process is terminated and an error message is generated.

[0062] The preset distance threshold is set based on the actual nursing operation distance and the spacing between adjacent fixed beacons. In this embodiment, the preset distance threshold is 0.3 meters to 0.6 meters.

[0063] In this embodiment, the central processing unit (CPU) of the blood pressure monitor traverses the candidate distance set to find the fixed beacon with the smallest physical distance value. Then, it compares this minimum physical distance value with a preset distance threshold. The preset distance threshold is set based on the actual nursing operation distance (usually within 0.5 meters) and the distance between adjacent fixed beacons (usually greater than 1 meter). In this embodiment, the preset distance threshold is 0.5 meters. If the minimum physical distance value is less than or equal to the preset distance threshold, it indicates that the blood pressure monitor is within the immediate vicinity of the bed corresponding to that fixed beacon, and the CPU identifies that fixed beacon as the target beacon. If the minimum physical distance value is greater than the preset distance threshold, it indicates that the blood pressure monitor is not within the immediate vicinity of any bed, the CPU terminates the current association process and generates an exception prompt, alerting the nursing staff to handle the situation manually.

[0064] Furthermore, when multiple fixed beacons in the candidate distance set have the same physical distance value and are all the minimum value, the portable vital signs acquisition device re-executes the distance measurement to re-acquire the physical distance between the device and the multiple fixed beacons. If, after a preset number of consecutive re-measurements, the physical distance values ​​corresponding to the multiple fixed beacons are still the same and are all the minimum value, the measurement is confirmed to be invalid and the process is terminated, generating an error message.

[0065] The fixed beacon includes a display unit and an input unit. The fixed beacon, which is identified as the target beacon, drives the display unit to display a prompt message indicating that vital signs measurement can begin. Step S3: The portable vital signs acquisition device collects vital signs data of the target object.

[0066] Specifically, the vital signs sensors are controlled to begin measuring the patient's blood pressure.

[0067] Step S4: The portable vital signs acquisition device sends vital signs data to the target beacon.

[0068] Specifically, the portable vital signs acquisition device transmits vital signs data to the target beacon in a point-to-point manner through the wireless communication link used for Bluetooth ranging.

[0069] In this embodiment, after the target beacon is identified, the blood pressure monitor establishes a point-to-point data communication connection with the target beacon's second wireless ranging module through its first wireless ranging module, that is, data transmission is performed through the wireless communication link used for wireless ranging. The blood pressure monitor's central processing unit packages the vital signs data measured by the vital signs sensors and sends it to the target beacon through the established wireless connection.

[0070] In step S5, the target beacon receives vital sign data and binds its own location identifier to the vital sign data to generate the bound information.

[0071] Specifically, step S5 includes the following sub-steps: Step S5.1: The target beacon receives vital sign data and performs a confirmation operation on the vital sign data; the confirmation operation includes any one of the following three methods: Manual confirmation method: The display unit of the target beacon displays the received vital signs data. After the nursing staff verifies that the data is correct, they input a confirmation signal through the input unit. The target beacon confirms the data is valid after receiving the confirmation signal. Automatic confirmation method: The target beacon determines whether the vital signs data meet the preset automatic confirmation conditions (e.g., the data is within a reasonable range of physiological parameters). If the conditions are met, the vital signs data are automatically confirmed as valid. Local verification method: The target beacon performs local validity verification on the vital signs data (e.g., format verification, integrity verification, or range verification). If the verification passes, the vital signs data is confirmed to be valid. If manual or automatic confirmation is used, the confirmation operation is performed before the binding operation; if local verification is used, the confirmation operation can be performed before or simultaneously with the binding operation (binding will proceed directly after verification).

[0072] Step S5.2: After the vital signs data are confirmed to be valid, the target beacon binds its own location identifier with the vital signs data and generates the bound information.

[0073] In this embodiment, the central processing unit of the target beacon receives vital sign data from the blood pressure monitor, associates and binds its pre-configured unique location identifier with the vital sign data, and may attach a current timestamp to generate a structured bound information packet.

[0074] In step S6, the target beacon sends the bound information to the server.

[0075] In this embodiment, the central processing unit of the target beacon sends the bound information packet to the backend server via the network communication module. After receiving the information packet, the server parses out the unique location identifier, queries the internally maintained bed-patient mapping table, finds the patient currently corresponding to the location identifier, and then stores the vital signs data and related timestamps into the patient's electronic medical record.

[0076] As an optional implementation, after the target beacon sends the bound information to the server, the server can first send the received bound information to the mobile terminal. The mobile terminal then receives the externally input confirmation command and returns it to the server. The server then associates and stores the vital signs data with the location identifier. This method allows caregivers to perform centralized confirmation via mobile terminal after completing a round of measurements in an area.

[0077] Example 4: This embodiment provides an automatic vital sign data association system based on Bluetooth ranging. The difference between this embodiment and Embodiment 1 is that it incorporates edge computing design concepts, upgrading the fixed beacon to a more powerful smart bedside terminal. This embodiment aims to improve system response speed, reduce computational pressure on the backend server and network bandwidth dependence, and enhance the overall robustness of the system.

[0078] This embodiment uses a scenario in a hospital ward where nursing staff use a portable Bluetooth blood pressure monitor to measure the blood pressure of patients in different beds as an example.

[0079] In this embodiment, the fixed beacon is upgraded to a smart bedside terminal. Its hardware configuration is basically the same as the fixed beacon in Embodiment 1, except that the smart bedside terminal's central processing unit has stronger computing power and larger storage space. In addition to possessing all the functions of the fixed beacon in Embodiment 1, the smart bedside terminal is also endowed with more local data processing and decision-making capabilities. For example, the smart bedside terminal can periodically synchronize and cache some clinical information of the patients in the currently served beds in its local storage, such as patient names (which can be anonymized), diagnoses, and historical trends or individualized normal ranges of recent vital signs data.

[0080] In this embodiment, the hardware configuration of the portable vital signs acquisition device and the server is the same as in Embodiment 1, and will not be repeated here.

[0081] In this embodiment, the method flow differs from that of Embodiment 3 in the data verification and preprocessing stages. In Embodiment 3, data verification is performed on a fixed beacon based on a general physiological range. In this embodiment, the process from data acquisition to the vital signs acquisition device sending data to the target beacon is the same as in Embodiment 3. The difference lies in that the smart bedside terminal executes more complex local verification and automatic verification logic after receiving the vital signs data. The smart bedside terminal not only determines whether the data is within a general physiologically reasonable range, but also queries locally cached patient information to obtain the patient's individualized parameters (such as the blood pressure control target range set by the doctor's order), and queries the patient's historical measurement data to analyze whether the current value is consistent with the individual's condition trend. Based on the above multi-dimensional information, the smart bedside terminal makes an intelligent judgment and automatically confirms the validity of the data with a high degree of confidence, without manual intervention. After confirming the validity of the data, the smart bedside terminal can also perform data preprocessing, such as labeling the data with tags like "conforms to individualized baseline" and "automatically confirmed," and then uploads these processed and structured, more information-rich data packets to the server.

[0082] Even in the event of a temporary interruption of the internal network, the smart bedside terminal, with its local caching and processing capabilities, can still complete the collection, verification, and temporary storage of multiple measurement data. Once the network is restored, the cached data will be uploaded to the server in batches, thus ensuring data integrity.

[0083] In this embodiment, the server configuration, functions, and storage method of the mapping relationship table are the same as in Embodiment 1, and will not be repeated here.

[0084] This embodiment utilizes an edge computing architecture, significantly reducing the computational and storage burden on the backend server. The backend server takes on more of the roles of data archiving, long-term storage, and providing query interfaces for upper-layer applications. Only "clean" data that has undergone preliminary processing and verification at the edge is uploaded, reducing the amount of data transmitted over the network and lowering the computational pressure on the central server. Simultaneously, the local caching capability in the event of a network outage enhances the overall robustness of the system. For specific implementation details, please refer to Embodiments 1 and 3, which will not be elaborated here.

[0085] Those skilled in the art will understand that, besides implementing the system and its various devices, modules, and units provided by this invention in the form of purely computer-readable program code, the same functions can be achieved entirely through logical programming of the method steps, making the system and its various devices, modules, and units of this invention function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers. Therefore, the system and its various devices, modules, and units provided by this invention can be considered as a hardware component, and the devices, modules, and units included therein for implementing various functions can also be considered as structures within the hardware component; alternatively, the devices, modules, and units for implementing various functions can be considered as both software modules implementing the method and structures within the hardware component.

[0086] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. An automatic correlation system for vital sign data based on Bluetooth ranging, characterized in that, include: Portable vital signs monitoring device, multiple fixed beacons and servers deployed at preset locations; The portable vital signs acquisition device is wirelessly connected to the fixed beacon via Bluetooth. It is used to collect vital signs data, perform two-way ranging with the fixed beacon to obtain the physical distance, determine the target beacon from multiple fixed beacons based on the physical distance between the device and each fixed beacon, and send the collected vital signs data to the target beacon. The fixed beacon is used to receive vital sign data from the portable vital sign acquisition device when it is identified as the target beacon, bind its pre-stored location identifier to the vital sign data, and send the bound information to the server. The server is connected to the fixed beacon via a wired or wireless network and is used to receive and store the bound information.

2. The automatic correlation system for vital sign data based on Bluetooth ranging according to claim 1, characterized in that, The process of the portable vital signs acquisition device to determine the target beacon includes: designating the fixed beacon corresponding to the minimum physical distance among all fixed beacons as the nearest beacon; and determining whether the physical distance value corresponding to the nearest beacon is less than or equal to a preset distance threshold. If so, the nearest beacon is determined as the target beacon.

3. The automatic vital sign data association system based on Bluetooth ranging according to claim 1, characterized in that, The fixed beacon includes a display unit and an input unit; the fixed beacon, which is identified as the target beacon, is also used to drive the display unit to display a prompt message indicating that vital signs measurement can begin before receiving vital signs data, and to display the received vital signs data through the display unit after receiving vital signs data, and to receive a manual confirmation signal through the input unit.

4. A method for automatically associating vital sign data based on Bluetooth ranging, based on the automatic association system for vital sign data based on Bluetooth ranging as described in any one of claims 1-3, characterized in that, The steps include the following: Step S1: The portable vital signs acquisition device receives the measurement start command, performs Bluetooth ranging with multiple fixed beacons, and obtains the physical distance with each fixed beacon; each fixed beacon has a unique location identifier; Step S2: The portable vital signs acquisition device determines the target beacon from multiple fixed beacons based on the physical distance; Step S3: The portable vital signs acquisition device collects vital signs data of the target object; Step S4: The portable vital signs acquisition device sends the vital signs data to the target beacon; Step S5: The target beacon receives the vital signs data and binds its own location identifier to the vital signs data to generate the bound information; Step S6: The target beacon sends the bound information to the server.

5. The method for automatically associating vital sign data based on Bluetooth ranging according to claim 4, characterized in that, In step S1, the Bluetooth ranging includes: the portable vital signs acquisition device actively initiating a ranging request, or the fixed beacon actively initiating a ranging request.

6. The method for automatically associating vital sign data based on Bluetooth ranging according to claim 4, characterized in that, In step S2, the process of determining the target beacon includes: the portable vital signs acquisition device associating the physical distance to each fixed beacon with the corresponding location identifier to form a candidate distance set; determining the fixed beacon with the smallest physical distance value from the candidate distance set, and recording it as the nearest beacon; and determining whether the physical distance value corresponding to the nearest beacon is less than or equal to a preset distance threshold. If so, the nearest beacon is determined as the target beacon; otherwise, the association process is terminated and an abnormal prompt is generated.

7. The method for automatically associating vital sign data based on Bluetooth ranging according to claim 6, characterized in that, When multiple fixed beacons in the candidate distance set have the same physical distance value and are all the minimum value, the portable vital signs acquisition device re-executes the distance measurement. If after a preset number of consecutive re-measurements, the physical distance values ​​corresponding to the multiple fixed beacons are still the same and are all the minimum value, the measurement is confirmed to be invalid and the process is terminated, generating an error message.

8. The method for automatically associating vital sign data based on Bluetooth ranging according to claim 4, characterized in that, The fixed beacon includes a display unit and an input unit. After step S2 and before step S3, the fixed beacon identified as the target beacon drives the display unit to display a prompt message indicating that vital signs can be measured.

9. The method for automatically associating vital sign data based on Bluetooth ranging according to claim 8, characterized in that, Step S5 includes the following sub-steps: Step S5.1: The target beacon receives the vital sign data and performs a confirmation operation on the vital sign data; the confirmation operation includes any one of the following three methods: Manual confirmation method: The target beacon drives its display unit to display the received vital sign data, and receives a manual confirmation signal through the input unit to confirm that the vital sign data is valid; Automatic confirmation method: The target beacon determines whether the vital signs data meet the preset automatic confirmation conditions. If they do, the vital signs data are automatically confirmed to be valid. Local verification method: The target beacon performs local validity verification on the received vital sign data. If the verification passes, the vital sign data is confirmed to be valid. Step S5.2: After the vital signs data is confirmed to be valid, the target beacon binds its own location identifier to the vital signs data and generates the bound information.

10. The method for automatically associating vital sign data based on Bluetooth ranging according to claim 4, characterized in that, After step S6, the method further includes: the server sending the received bound information to the mobile terminal; the mobile terminal receiving an externally input confirmation command and returning it to the server; and the server, in response to the confirmation command, associating and storing the vital signs data with the location identifier.

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