RFID personnel positioning system

Abstract

The utility model belongs to the technical field of RFID, and particularly relates to an RFID personnel positioning system, which comprises a personnel wearing bracelet, a processing module and positioning base stations distributed in a positioning scene, the personnel wearing bracelet comprises a power supply module, and an electronic tag, a monitoring module, a voice receiving module, a power supply button and an indicating lamp which are electrically connected with the power supply module; the electronic tag comprises a time recording unit and a signal transmitting unit, the time recording unit is in signal connection with the signal transmitting unit, and the time recording unit is in signal connection with the signal transmitting unit; the processing module comprises an information processing module, and a reader, an early warning module, a storage module and a positioning module which are in signal connection with the information processing module. According to the utility model, the cruising ability of the system is obviously improved, the comprehensive and accurate monitoring of the personnel state is realized, the practicability and response efficiency of the help seeking function are optimized, and the positioning accuracy and the anti-interference ability are enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of RFID, and in particular relates to an RFID personnel positioning system. Background Art

[0002] RFID, as one of the supporting technologies of the Internet of Things, is an identification technology that does not require direct contact. It uses wireless radio frequency signals to read and transmit the information stored in electronic tags. The personnel positioning system refers to a value-added service that locates users with the support of an electronic map platform.

[0003] However, the current mainstream technology for personnel positioning is to use GPS for positioning. Although GPS positioning is relatively accurate, the GPS signal is poor in closed environments with interference, such as indoors, and cannot locate personnel. It is also impossible to grasp the position of staff in situations such as special operations. It is not suitable for factory and enterprise information management, and the personnel management efficiency is low.

[0004] The Chinese utility model patent with authorization announcement number CN216161109U discloses an RFID personnel positioning system, which includes a wristband worn by a person, a transceiver antenna module and a processing module. The processing module includes a reader, an information processing module, a personnel information module and an early warning module. The information processing module is respectively connected to the reader, the personnel information module and the early warning module by signal. The utility model solves the problem that the existing mainstream technology for personnel positioning uses GPS for positioning. Although GPS positioning is relatively accurate, in closed environments with interference such as indoors, the GPS signal is poor and cannot achieve personnel positioning. It is impossible to grasp the position of staff in special operations and other situations. At the same time, an early warning module is used to issue an early warning to avoid accidents. Staff can also directly prompt for help through the help button.

[0005] However, during use, the above patent has the problem that the user is in different states. When the bracelet is always worn in one mode, the battery will be lost quickly. Secondly, only the blood oxygen detection cannot timely and effectively grasp the vital signs and status of the person. Finally, although a help button and an accidental touch off button are set, in actual use, the bracelet worn by the person is small in size. The integration of two independent buttons will compress other functional modules, and the operation is relatively cumbersome and inflexible. Utility Model Content

[0006] In view of the above-mentioned deficiencies in the prior art, the present invention provides an RFID personnel positioning system to solve the problems in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] An RFID personnel positioning system includes a wristband worn by a person, a processing module, and positioning base stations distributed in a positioning scene; the wristband worn by the person includes a power module and an electronic tag electrically connected to the power module, a monitoring module, a voice receiving module, a power button, and an indicator light; the electronic tag includes a time recording unit and a signal transmitting unit, and the time recording unit is signal-connected to the signal transmitting unit; the processing module includes an information processing module and a reader, an early warning module, a storage module, and a positioning module signal-connected to the information processing module; the positioning base station receives the signal sent by the electronic tag and transmits the signal to the reader, and the positioning module calculates the person's position based on the signal received by the positioning base station.

[0009] Furthermore, the monitoring module includes a heart rate monitor and a three-axis acceleration sensor, and the heart rate monitor is connected to the three-axis acceleration sensor signal.

[0010] Furthermore, the number of the positioning base stations is at least three, each positioning base station has a built-in signal receiving module, and the signal receiving module is connected to a second-order filtering circuit.

[0011] Furthermore, the power button integrates a help function. Continuously clicking the power button can trigger the function of sending a help message, and long pressing the power button can cancel the sending of the help message.

[0012] Furthermore, the voice receiving module is preset with a help word, and when a voice help command is received, a help message is sent through the electronic tag.

[0013] Furthermore, the electronic tag can switch the operating mode according to the activity state detected by the three-axis acceleration sensor.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The positioning base stations are arranged in a uniform pattern, using at least three base stations. Combined with a positioning module based on the Time Difference of Arrival (TDOA) algorithm, the system determines the three-dimensional position coordinates by calculating the time difference between signals arriving at different base stations, thus improving positioning accuracy. Furthermore, the base stations have built-in second-order filtering circuits that effectively filter out high-frequency noise in the environment, ensuring the stability of the received signal and further ensuring the reliability of the positioning results.

[0016] 2. The wristband uses an intelligent power management system. The power module automatically enters a low-energy sleep mode based on the three-axis accelerometer's consistent state or system standby status. This mode can be awakened by simply pressing and holding the power button for three seconds. This design effectively reduces unnecessary energy consumption and, combined with the rechargeable lithium battery, significantly extends the wristband's single-charge life and reduces the need for frequent charging.

[0017] 3. The monitoring module integrates heart rate monitoring and triaxial accelerometer monitoring. This not only captures heart rate data in real time, triggering alerts when heart rate anomalies (excessively high or low) occur, but also determines a person's motion status based on acceleration changes, automatically sending alerts if prolonged inactivity or unusual movement is detected. This dual monitoring mechanism allows management to fully understand a person's vital signs and activity status, providing a more reliable basis for safety assurance.

[0018] 4. The power button integrates a call-for-help function. Continuous clicks send a call for help, while a long press cancels the call. Operation is simple and intuitive. A voice reception module, pre-set with keywords like "help" and "help," supports contactless voice assistance, resolving the limitation of manual operation when both hands are busy. These two methods work together to ensure that personnel can quickly send a call for help in an emergency, shortening rescue response time.

[0019] 5. The indicator light adopts RGB three-color LED design, which intuitively reflects the working status, power status and various warning information of the bracelet through different colors and flashing states (green flashing indicates normal operation, blue solid light indicates low power warning, red fast flashing indicates help activation, and yellow flashing indicates abnormal warning), making it convenient for users and managers to quickly understand the system status. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of an RFID personnel positioning system of the utility model;

[0021] Figure 2 This is a structural diagram of a wristband worn by a person in an RFID personnel positioning system of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of an electronic tag of an RFID personnel positioning system of the utility model;

[0023] Figure 4 This is a structural diagram of a monitoring module of an RFID personnel positioning system of the present utility model;

[0024] Figure 5 This is a circuit structure diagram of a positioning base station receiving signals of an RFID personnel positioning system of the utility model;

[0025] Figure 6 This is a structural diagram of a processing module of an RFID personnel positioning system of the present utility model;

[0026] The reference numerals in the drawings of the specification include:

[0027] 100. Wristband worn by personnel; 101. Electronic tag; 111. Time recording unit; 112. Signal transmitting unit; 102. Power module; 103. Monitoring module; 131. Heart rate monitoring; 132. Three-axis acceleration sensor; 104. Voice receiving module; 105. Power button; 106. Indicator light; 200. Positioning base station; 300. Processing module; 301. Reader; 302. Information processing module; 303. Early warning module; 304. Storage module; 305. Positioning module. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0029] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0030] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] In the description of this utility model, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0032] Example 1:

[0033] like Figure 1-6Specifically, the present invention provides an RFID personnel positioning system, including a wristband 100 worn by a person, a positioning base station 200 and a processing module 300.

[0034] In this embodiment, the wristband 100 worn by a person includes a power module 102 and an electronic tag 101 electrically connected to the power module 102 , a monitoring module 103 , a voice receiving module 104 , a power button 105 and an indicator light 106 .

[0035] Furthermore, the wristband 100 is designed as a wristband and has a built-in power module 102 that can use a rechargeable lithium battery. The power module 102 uses an intelligent power management system. When the system is in standby mode or the three-axis acceleration sensor 132 detects a consistent state for a long time, it automatically enters a dormant low-energy mode, which can be awakened by pressing and holding the power button 105 for 3 seconds.

[0036] Furthermore, the electronic tag 101 adopts Zigbee wireless communication technology, includes a time recording unit 111 and a signal transmitting unit 112 , and the time recording unit 111 is signal-connected to the signal transmitting unit 112 .

[0037] Furthermore, the monitoring module 103 includes a heart rate monitor 131 and a three-axis acceleration sensor 132 . The heart rate monitor 131 is signal-connected to the three-axis acceleration sensor 132 . The heart rate monitor 131 adopts PPG heart rate monitoring technology. The model of the three-axis acceleration sensor 132 is ADXL345.

[0038] Furthermore, the voice receiving module 104 utilizes a MEMS microphone array and a voice recognition chip. It is pre-programmed with keywords such as "help" and "help." Upon receiving a voice help request, a help message is sent via the electronic tag 101. The power button 105 also incorporates a help request function. Continuously clicking the power button 105 triggers the sending of the help request, while a long press cancels the sending of the help request. The electronic tag 101 switches operating modes based on the activity detected by the triaxial accelerometer 132. The inclusion of the voice receiving module 104 enables contactless operation, allowing users to trigger corresponding functions through voice commands, eliminating the limitation of being unable to press buttons when both hands are busy (e.g., operating a device), thereby improving emergency response efficiency.

[0039] Furthermore, the indicator light 106 uses an RGB three-color LED, green flashing indicates normal working status, blue constant light indicates low battery warning (triggered when the battery is less than 20%), and red rapid flashing indicates activation of the help signal.

[0040] In this embodiment, the number of positioning base stations 200 is at least three and evenly distributed in the positioning scene. The positioning base station 200 has a built-in signal receiving module, and the signal receiving module is connected to a second-order filter circuit composed of a built-in operational amplifier LM324 and external resistors and capacitors, which can filter out environmental high-frequency noise. Figure 5 As shown, the second-order filter circuit is constructed using the operational amplifier LM324: the input stage consists of a high-pass filter network composed of capacitor C4 and resistor R11, which blocks DC and suppresses low-frequency interference. The non-inverting follower connected with the operational amplifier P3 realizes signal buffering, and its high input impedance characteristic is used to avoid the load effect of the previous stage signal source. The intermediate stage uses resistors R1 and R2 and capacitors C1 and C2 to form a bandpass filter structure. Combined with the amplification function of the operational amplifier P1, it performs frequency-selective amplification on the positioning signal of a specific frequency band and increases the amplitude of the target signal. The rear stage consists of an in-phase amplifier circuit composed of operational amplifier P2 and resistors R7 and R8 to further enhance the signal strength. At the same time, the global negative feedback network composed of R9 and R10 stabilizes the multi-stage amplification gain, suppresses noise and distortion, and finally outputs a pure and amplitude-adapted positioning signal to the back-end processing module 300, achieving high-frequency noise filtering of the environment and high-quality preprocessing of weak signals.

[0041] In this embodiment, the processing module 300 includes an information processing module 302, a reader 301, an early warning module 303, a storage module 304, and a positioning module 305, all connected to the information processing module 302. The positioning base station 200 receives signals from the electronic tag 101. The reader 301 is a USB Zigbee protocol reader / writer that receives the signal data transmitted by the base station. The positioning module 305 uses the signal received from the positioning base station 200 and the time difference of arrival (TDOA) algorithm to determine the location coordinates by calculating the transmission time difference between the signal from the wristband to different base stations. The electronic tag 101 transmits monitoring information from the monitoring module 103 it carries. The early warning module 303 integrates an audible and visual alarm and a GSM module to send text message notifications. The storage module 304 can store personal information, trajectory, and heart rate data.

[0042] Working principle:

[0043] When the system is operating, the electronic tag 101 of the person wearing the wristband 100 periodically transmits a wireless signal containing an identity ID and a timestamp through the signal transmission unit 112 every second. The positioning base station 200 receives the signal and, after noise reduction through a second-order filter circuit, transmits the signal to the reader 301. The reader 301 transmits the data to the information processing module 302. The positioning module 305 uses the TDOA algorithm to calculate the three-dimensional position coordinates (x, y, z) of the person wearing the wristband 100 based on the time difference between at least three base stations receiving the same signal.

[0044] The triaxial accelerometer 132 monitors the user's activity status in real time. If it detects 10 minutes of inactivity, the electronic tag 101 switches to low-power mode, and the indicator light 106 flashes slowly green. If the user clicks the power button 105 three times in a row, or if the voice reception module 104 detects a preset help message, the electronic tag 101 immediately sends a help message, the indicator light 106 flashes rapidly red, and the warning module 303 triggers an audible and visual alarm and sends a text message to the administrator. The heart rate monitor 131 continuously collects heart rate data. If the heart rate exceeds 180 beats / minute or is below 40 beats / minute for 10 seconds, it is considered an abnormal state. If the triaxial accelerometer 132 detects abnormal movement, the electronic tag 101 automatically sends a warning message, and the indicator light 106 flashes yellow. The storage module 304 records the user's location and heart rate data in real time, and the information processing module 302 generates a trajectory map and heart rate curve. Administrators can query historical data, analyze abnormal behavior, and provide warnings for dangerous areas through a web interface.

[0045] The above are only embodiments of the present invention, and the circuits, electronic components and modules involved are all prior art, which can be fully implemented by those skilled in the art. It is needless to say that the content protected by this application does not involve improvements to software and methods. Common knowledge such as the specific structures and characteristics known in the scheme are not described in detail here. Ordinary technicians in the field are aware of all common technical knowledge in the technical field to which the utility model belongs before the application date or priority date, can obtain all prior art in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the field can improve and implement this scheme based on their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, several variations and improvements can be made, which should also be regarded as the scope of protection of the utility model. These will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. An RFID personnel positioning system, characterized in that: It comprises: a wristband (100) worn by a person, a processing module (300), and positioning base stations (200) distributed in a positioning scene; The wristband (100) worn by a person includes a power module (102) and an electronic tag (101) electrically connected to the power module (102), a monitoring module (103), a voice receiving module (104), a power button (105) and an indicator light (106); the electronic tag (101) includes a time recording unit (111) and a signal transmitting unit (112), and the time recording unit (111) is signal-connected to the signal transmitting unit (112); The processing module (300) includes an information processing module (302), a reader (301) signal-connected to the information processing module (302), an early warning module (303), a storage module (304), and a positioning module (305); The positioning base station (200) receives a signal sent by the electronic tag (101) and transmits the signal to the reader (301), and the positioning module (305) calculates the position of the person based on the signal received by the positioning base station (200).

2. The RFID personnel positioning system according to claim 1, wherein: The monitoring module (103) includes a heart rate monitor (131) and a three-axis acceleration sensor (132), and the heart rate monitor (131) is signal-connected to the three-axis acceleration sensor (132).

3. The RFID personnel positioning system according to claim 1, wherein: The number of the positioning base stations (200) is at least three, and the positioning base stations (200) are equipped with a built-in signal receiving module, and the signal receiving module is connected to a second-order filter circuit.

4. The RFID personnel positioning system according to claim 1, wherein: The power button (105) is integrated with a help-seeking function. Continuously clicking the power button (105) can trigger the function of sending a help-seeking message, and long pressing the power button (105) can cancel the sending of the help-seeking message.

5. The RFID personnel positioning system according to claim 4, characterized in that: The voice receiving module (104) is preset with a help word, and when receiving a voice help instruction, a help message is sent via the electronic tag (101).

6. The RFID personnel positioning system according to claim 2, wherein: The electronic tag (101) can switch the operating mode according to the activity state detected by the three-axis acceleration sensor (132).

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