A height and weight data collection system based on wristband two-dimensional code recognition

Abstract

This invention relates to the field of weighing technology, and in particular to a height and weight data acquisition system based on wristband QR code recognition. The system includes a base plate, a first support column fixedly connected to the rear upper side of the base plate, a second support column rotatably connected to the upper end of the first support column via a hinge, and a mounting plate rotatably connected to the upper end of the second support column via a damping shaft. A height measurement module is installed inside the mounting plate at the end furthest from the second support column. A housing is connected to the side end of the first support column via an adjustment component, and a display screen and a QR code recognition module are fixedly connected inside the front end of the housing. A weighing module is fixedly connected to the upper upper part of the base plate. A main board is fixedly connected inside the first support column, and a data processing module, a communication module, and a power supply module are fixedly connected to the main board. This invention eliminates the need for manual intervention during the uploading of weight and height data, significantly improving the efficiency and accuracy of data acquisition and avoiding potential identity mismatches or data entry errors in traditional methods.

Description

Technical Field

[0001] This invention relates to the field of height and weight acquisition technology, and in particular to a height and weight data acquisition system based on wristband QR code recognition. Background Technology

[0002] In clinical practice, patient height and weight are crucial basic health data, and their accuracy directly impacts medical decisions such as medication dosage calculation, nutritional plan development, and disease progression assessment. Currently, when collecting height and weight data for inpatients, hospitals first use traditional mechanical or electronic scales to collect weight, followed by a measuring tape to collect height. During this process, medical staff must first verify the patient's identity, manually record the height and weight data, and then enter it into the hospital information system or electronic medical record system. This is not only inefficient but also prone to human error, leading to mismatches between patient identity and height / weight data, as well as data entry errors. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a height and weight data acquisition system based on wristband QR code recognition.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a height and weight data acquisition system based on wristband QR code recognition, comprising a base plate, a first support column fixedly connected to the rear upper side of the base plate, a second support column rotatably connected to the upper end of the first support column via a hinge, a mounting plate rotatably connected to the upper end of the second support column via a damping shaft, and a height measurement module installed inside the mounting plate at the end away from the second support column; a housing connected to the side end of the first support column via an adjustment component, an antenna fixedly connected to the upper end of the housing, and a display screen and a QR code recognition module fixedly connected inside the front end of the housing, the QR code recognition module being located below the display screen; a weighing module fixedly connected to the upper upper end of the base plate; a main board fixedly connected inside the first support column, a data processing module, a communication module, and a power supply module fixedly connected to the main board, the data processing module being electrically connected to the QR code recognition module, the weighing module, the height measurement module, the communication module, and the display screen respectively, for receiving identity information, weight data, and height data, performing data integration and verification, and generating a complete data packet containing patient identity information, weight, height, and measurement time; the communication module being electrically connected to the antenna.

[0005] As a further description of the above technical solution: The adjustment assembly includes a slide rail, a slide block, and a locking element. The slide rail is fixedly connected to the side end of the first support column, and the slide block is slidably connected to the slide rail. The slide block is fixedly connected to the housing, and a locking element is provided inside the slide block.

[0006] As a further description of the above technical solution: The locking component includes a locking bolt and a friction block. The locking bolt is internally threaded onto the slide block, and the friction block is rotatably connected to one end of the locking bolt near the first support column.

[0007] As a further description of the above technical solution: Two baffles are fixedly connected to the side end of the first support column, located at the upper and lower ends of the slide rail.

[0008] As a further description of the above technical solution: The first and second support columns are provided with fixing components at their rear ends. The fixing components include a plate, a slider, a socket, a U-shaped hole, a screw, and a nut. The socket is fixedly connected to the rear end of the first support column, and the U-shaped hole is opened on the rear end face of the socket. The sliding hole is opened on the rear end face of the second support column, and a slider is slidably connected inside the sliding hole. The slider is T-shaped, and the plate is fixedly connected to the rear end of the slider. The plate cooperates with the socket, and the screw is fixedly connected to the rear end of the plate. A nut is threaded onto the screw.

[0009] As a further description of the above technical solution: The base plate is equipped with leveling components at its four lower corners. Each leveling component includes a U-shaped frame and adjusting feet. The U-shaped frame is fixedly connected to each of the four lower corners of the base plate, and the adjusting feet are threadedly connected inside the U-shaped frame.

[0010] As a further description of the above technical solution: The height measurement module includes an ultrasonic transmitting sensor and an ultrasonic receiving sensor; the ultrasonic transmitting sensor and the ultrasonic receiving sensor are used to transmit and receive reflected ultrasonic signals for calculating the patient's height.

[0011] As a further description of the above technical solution: The QR code recognition module uses an industrial-grade scanner to scan the patient's wristband QR code and obtain their identity information.

[0012] As a further description of the above technical solution: The weighing module includes four pressure sensors and a weighing platform. The four pressure sensors are evenly distributed at the four corners of the bottom of the weighing platform to collect patient weight data and convert analog signals into digital signals.

[0013] As a further description of the above technical solution: The communication module supports dual-mode communication via Wi-Fi and Ethernet, has a built-in encryption chip, and uses the HTTPS protocol for data transmission. It is used to encrypt and upload complete data packets to the hospital information system or electronic medical record system, and to receive upload status signals from the system.

[0014] The present invention has the following beneficial effects: 1. Compared with existing technologies, this height and weight data collection system based on wristband QR code recognition, by setting up a data processing module, a height measurement module, a communication module, a QR code recognition module, and a weighing module, allows for user identification. During use, the patient wears a wristband with a QR code and aligns it with the QR code recognition module. The patient then stands on the weighing module, where the height measurement module automatically detects the patient's height, and the weighing module simultaneously acquires weight information. The collected height and weight data are transmitted to the data processing module, which then binds the patient's identity with the corresponding height and weight data and transmits this information in real time to the hospital information system or electronic medical record system via the communication module. This process requires no manual intervention, significantly improving the efficiency and accuracy of data collection and avoiding potential identity mismatches or data entry errors that may occur in traditional methods.

[0015] 2. Compared with the existing technology, this height and weight data acquisition system based on wristband QR code recognition, by setting up a slide rail, a slide base and a locking device, allows the slide base to slide on the slide rail when in use, thereby adjusting the height of the housing. This makes it suitable for patients of different heights and improves the practicality of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention from a first-view perspective; Figure 2 This is a schematic diagram of the overall structure of the invention from a second perspective; Figure 3 For the present invention Figure 2 Enlarged view of section A in the middle; Figure 4 This is a schematic diagram of the overall structure of the invention from a third-person perspective; Figure 5 For the present invention Figure 4 Enlarged view of section B; Figure 6 This is a schematic diagram of the internal structure of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of section C.

[0017] Legend: 1. Base plate; 2. First support column; 3. Second support column; 4. Mounting plate; 5. Height measurement module; 6. Weighing module; 7. Adjustment component; 701. Slide rail; 702. Slide block; 703. Locking component; 7031. Locking bolt; 7032. Friction block; 8. Housing; 9. Display screen; 10. QR code recognition module; 11. Fixing component; 1101. Insert plate; 1102. Slider; 1103. Socket; 1104. U-shaped hole; 1105. Screw; 1106. Nut; 12. Leveling component; 1201. U-shaped frame; 1202. Adjusting pad; 13. Main board; 14. Sliding hole; 15. Baffle; 16. Antenna; 17. Data processing module; 18. Communication module; 19. Power supply module. Detailed Implementation

[0018] Reference Figure 1-7This invention provides a height and weight data acquisition system based on wristband QR code recognition, comprising a base plate 1, a first support column 2 fixedly connected to the rear side of the upper end of the base plate 1, a second support column 3 rotatably connected to the upper end of the first support column 2 via a hinge, a mounting plate 4 rotatably connected to the upper end of the second support column 3 via a damping shaft, and a height measurement module 5 installed inside the end of the mounting plate 4 away from the second support column 3; a housing 8 is connected to the side end of the first support column 2 via an adjustment component 7, an antenna 16 is fixedly connected to the upper end of the housing 8, and a display is fixedly connected inside the front end of the housing 8. The system includes a screen 9 and a QR code recognition module 10, with the QR code recognition module 10 located at the lower end of the screen 9. A weighing module 6 is fixedly connected to the upper end of the base plate 1. A main board 13 is fixedly connected inside the first support column 2. A data processing module 17, a communication module 18, and a power supply module 19 are fixedly connected to the main board 13. The data processing module 17 is electrically connected to the QR code recognition module 10, the weighing module 6, the height measurement module 5, the communication module 18, and the screen 9, respectively, and is used to receive identity information, weight data, and height data, perform data integration and verification, and generate a packet. The system includes a complete data packet containing patient identification, weight, height, and measurement time; a communication module 18 electrically connected to an antenna 16; a height measurement module 5 including an ultrasonic transmitting sensor and an ultrasonic receiving sensor; the ultrasonic transmitting and receiving sensors are used to transmit and receive reflected ultrasonic signals for calculating the patient's height; a QR code recognition module 10 using an industrial-grade scanner to scan the patient's wristband QR code and obtain identification information; a weighing module 6 including four pressure sensors and a weighing platform, with the four pressure sensors evenly distributed at the four corners of the bottom of the weighing platform, used to collect patient weight data and convert analog signals into digital signals; a communication module 18 supporting Wi-Fi and Ethernet dual-mode communication, with a built-in encryption chip, using the HTTPS protocol for data transmission, used to encrypt and upload the complete data packet to the hospital information system or electronic medical record system, and receive upload status signals from the system; and a power module 19 using an AC220V to DC12V power adapter with a built-in 12V 10Ah lithium battery, capable of continuous operation for more than 6 hours after a power outage, meeting the hospital's emergency power outage needs.

[0019] Specifically, Power supply implementation of power module 19: The power module 19 uses an AC220V to DC12V switching power adapter. After being connected to the hospital's mains power, it converts 220V AC power to 12V DC power, providing stable power to the data processing module 17, communication module 18, QR code recognition module 10, height measurement module 5, weighing module 6, and display screen 9 through the power supply lines on the mainboard 13. Simultaneously, the built-in 12V 10Ah lithium battery in the power module 19 is in float charging mode. When the mains power is interrupted, the lithium battery automatically switches to power supply mode, ensuring voltage stability for each module through the power management chip. This ensures the device can operate continuously for more than 6 hours, meeting the needs of sudden power outages in hospitals.

[0020] Identity verification implementation of QR code recognition module 10: The QR code recognition module 10 adopts an industrial-grade CMOS scanner with a built-in high-speed QR code decoding chip, and the scanning response time is ≤50ms. The patient stands in front of the weighing platform and aligns their medical wristband (with a QR code printed with the patient's name, hospital number, medical record number, etc.) with the scanning window of the QR code recognition module 10 (5-15cm away). The QR code recognition module 10 automatically starts the scanning program, acquiring the QR code image through the CMOS sensor. After being parsed by the decoding chip, the patient's identification information (such as a unique hospital number) is extracted and converted into a standard digital signal, which is transmitted to the data processing module 17 via the SPI communication interface. If the scan fails (e.g., due to a damaged QR code or excessive distance), the QR code recognition module 10 outputs a fault signal to the data processing module 17. The data processing module 17 then controls the display screen 9 to display a message indicating that the scan failed and requesting a retry, until the scan is successful.

[0021] Implementation of weight data collection in weighing module 6: Four pressure sensors (model HX711) of the weighing module 6 are installed at the four corners of the bottom of the weighing platform, with strain gauges of the sensors rigidly connected to the platform. When the patient stands in the center of the platform, the pressure generated by their weight causes the strain gauges to deform. The pressure sensors convert the deformation signal into an analog voltage signal (range 0-5V, corresponding to a weight range of 0-200kg). The pressure sensors transmit the analog voltage signal to the built-in AD conversion module via a differential signal line. The AD conversion module converts the analog signal into 24-bit digital weight data, which is then transmitted in real time to the data processing module 17 via an I2C communication interface. To ensure data accuracy, the four pressure sensors employ a mean filtering algorithm. After receiving the raw data from the four sensors, the data processing module 17 removes outliers (such as data exceeding the reasonable weight range) and calculates the average value as the final weight data.

[0022] Implementation of height data collection in height measurement module 5: The height measurement module 5 includes an ultrasonic transmitting sensor (model HC-SR04) and an ultrasonic receiving sensor. The installation height of the mounting plate 4 is preset to 2.2m (suitable for adult height measurement). After the QR code recognition module 10 successfully scans the code, the data processing module 17 sends a start measurement signal to the height measurement module 5. The ultrasonic transmitting sensor emits a 40kHz ultrasonic signal towards the weighing platform, simultaneously triggering the timing unit to start timing. When the ultrasonic signal encounters the top of the patient's head, it is reflected, and the reflected signal is captured by the ultrasonic receiving sensor, stopping the timing unit. The data processing module 17 calculates the measurement distance (s=v×t / 2) based on the ultrasonic flight time (t) and the speed of sound (v, default 340m / s), and then derives the patient's height data using the preset formula: height = mounting plate height - measurement distance - weighing platform thickness (the mounting plate height and weighing platform thickness are preset fixed values ​​stored in the register of the data processing module 17). If no reflected signal is detected (e.g., the patient is not standing in the measurement area), the data processing module 17 controls the display screen 9 to display a prompt message asking the patient to stand in the center of the platform until the measurement is successful.

[0023] Integration and verification implementation of data processing module 17: The data processing module 17 uses an STM32F103 microcontroller as the core control unit of the system. Its collaborative implementation steps with other modules are as follows: Step 1: Data Reception. Receive the identification information transmitted by the QR code recognition module 10 via the SPI interface, the weight data from the weighing module 6 via the I2C interface, and the height data from the height measurement module 5 via the UART interface. Simultaneously, record the data reception time (i.e., the measurement time).

[0024] Step 2: Data Validation. The format of the identification information is validated (e.g., whether the hospital number is an 8-digit number). If the format is incorrect, an invalid identification information message is displayed on screen 9. Weight data is validated within a reasonable range (0-200kg), and height data is validated within a reasonable range (0.5-2.2m). If the data exceeds the range, it is considered abnormal, and the corresponding measurement module is controlled to re-collect the data (maximum of 3 retries).

[0025] Step 3: Data Integration. After successful verification, the patient's identification information, weight data, height data, and measurement time are integrated into a complete data package according to a preset format (e.g., hospital number: XXX; weight: XX.XXkg; height: XX.XXcm; measurement time: YYYY-MM-DDHH:MM:SS), and stored in the microcontroller's Flash memory (retaining the most recent 100 data entries to prevent data loss).

[0026] Step 4: Data Distribution. The integrated weight data, height data, and identification information are transmitted to the display screen 9 via the SPI interface for real-time display; the complete data packet is transmitted to the communication module 18 via the UART interface to trigger the data upload process.

[0027] Display implementation of screen 9: Display screen 9 uses a 5-inch TFT LCD screen with a resolution of 800×480, and communicates with data processing module 17 via an SPI interface. After receiving information transmitted by data processing module 17, display screen 9 displays information in sections: the upper section displays patient identification information (e.g., Patient: XXX, Hospital Number: XXX), the middle section displays weight and height data (e.g., Weight: 65.32kg, Height: 175.5cm), and the lower section displays measurement time and data upload status (e.g., Measurement Time: 2024-05-20 14:30:25, Upload Status: Pending Upload). When data upload is successful, the upload status is updated to "Upload Successful"; if upload fails, it displays "Upload Failed, Retrying," and updates in real time following the retry progress of communication module 18.

[0028] Data transmission implementation of communication module 18: The communication module 18 uses the ESP32-WROOM-32 module, supporting dual-mode communication via Wi-Fi and Ethernet (RJ45 interface), and has a built-in AES-256 encryption chip. Its collaborative implementation steps with the data processing module 17 and the hospital system are as follows: Step 1: Data Encryption. After receiving the complete data packet transmitted by the data processing module 17, the encryption chip uses the AES-256 algorithm to encrypt the data packet, generating an encrypted data packet (to prevent theft or tampering during data transmission).

[0029] Step 2: Communication Mode Selection. The communication mode is automatically switched according to the hospital network environment: if a Wi-Fi signal is detected (with a pre-configured hospital Wi-Fi name and password), Wi-Fi communication is used first; if the Wi-Fi signal is unstable or not detected, it is automatically switched to Ethernet communication (accessing the hospital LAN via an RJ45 interface).

[0030] Step 3: Data Upload. The communication signal is enhanced by antenna 16, and encrypted data packets are uploaded to the designated server of the Hospital Information System (HIS) or Electronic Medical Record System (EMR) using the HTTPS protocol (the server IP address and port number are pre-configured in communication module 18).

[0031] Step 4: Status Feedback. After receiving the encrypted data packet, the server decrypts, verifies, and stores it, then returns a successful upload confirmation signal to the communication module 18; if the server does not receive the signal or the verification fails, it returns an upload failure signal. The communication module 18 transmits the feedback signal to the data processing module 17 via the UART interface, and the data processing module 17 controls the display screen 9 to update the upload status. If the upload fails, the communication module 18 automatically retryes (up to 5 times), and if it still fails, it outputs an alarm signal (an external buzzer can be connected to alert medical staff).

[0032] In use, the height of the housing 8 is first adjusted according to the patient's height. This adjustment is achieved using the adjustment component 7, accommodating users of different heights. After adjustment, the patient stands on the weighing module 6 and aligns the QR code on their wristband with the QR code recognition module 10. The QR code recognition module 10 automatically scans and obtains the patient's identity information. Simultaneously, the weighing module 6 begins collecting the patient's weight data, while the height measurement module 5 measures the patient's height using ultrasonic transmitting and receiving sensors, generating height data. This data is transmitted to the data processing module 17, which integrates and verifies the identity information, weight, and height, generating a complete data packet containing the patient's identification, weight, height, and measurement time. Subsequently, the communication module 18 uploads the encrypted data packet to the hospital information system or electronic medical record system via Wi-Fi or Ethernet, receiving real-time upload status signals from the system, thus completing the entire data collection and transmission process. This eliminates the need for manual intervention during the upload to the hospital information system or electronic medical record system, significantly improving the efficiency and accuracy of data collection and avoiding potential identity mismatches or data entry errors in traditional methods. At the same time, the data processing module 17 also transmits weight and height data to the display screen 9 so that the patient can understand his or her height and weight.

[0033] The adjusting assembly 7 includes a slide rail 701, a slide block 702, and a locking element 703. The slide rail 701 is fixedly connected to the side end of the first support column 2, and the slide block 702 is slidably connected to the slide rail 701. The slide block 702 is fixedly connected to the housing 8, and the locking element 703 is provided inside the slide block 702. The locking element 703 includes a locking bolt 7031 and a friction block 7032. The locking bolt 7031 is threadedly connected inside the slide block 702, and the friction block 7032 is rotatably connected to the end of the locking bolt 7031 near the first support column 2. During operation, when adjustment is required, the locking bolt 7031 is turned, causing the friction block 7032 to move away from the side wall of the first support column 2. This releases the fixation on the slide block 702, allowing the slide block 702 to slide freely on the slide rail 701, thereby adjusting the height of the housing 8. After adjusting to the appropriate position, tighten the locking bolt 7031 in the reverse direction to make the friction block 7032 re-closely contact the side wall of the first support column 2, thereby fixing the slide 702 and ensuring that the housing 8 remains stable during use.

[0034] The first support column 2 is fixedly connected to a baffle 15 on its side. There are two baffles 15, which are located at the upper and lower ends of the slide rail 701. During operation, by setting the baffles 15, the slide block 702 can be blocked under the action of the baffles 15, so as to prevent the slide block 702 from leaving the slide rail 701.

[0035] The rear ends of the first support column 2 and the second support column 3 are provided with fixing components 11. The fixing components 11 include a plate 1101, a slider 1102, a socket 1103, a U-shaped hole 1104, a screw 1105, and a nut 1106. The rear end of the first support column 2 is fixedly connected to the socket 1103, and the rear end face of the socket 1103 has a U-shaped hole 1104. The rear end face of the second support column 3 has a sliding hole 14, and the slider 1102 is slidably connected inside the sliding hole 14. The slider 1102 is T-shaped, and the rear end of the slider 1102 is fixedly connected to the plate 1101. The plate 1101 cooperates with the socket 1103, and the rear end of the plate 1101 is fixedly connected to the screw 1105. The screw 1105 is threaded with a nut 1106. During operation, when assembling, the second support column 2 is... The support column 3 flips upward, so that the bottom end of the second support column 3 contacts the top end of the first support column 2. Then, the insert plate 1101 is pulled downward, and the slider 1102 slides inside the sliding hole 14. With the cooperation of the slider 1102 and the sliding hole 14, the insert plate 1101 can only move vertically. During the downward movement of the insert plate 1101, the insert plate 1101 is inserted into the socket 1103, and the screw 1105 enters the U-shaped hole 1104. After the insert plate 1101 is inserted into the socket 1103, the nut 1106 is tightened, so that the insert plate 1101 is stably fixed inside the socket 1103. This helps the second support column 3 to stand stably on the first support column 2, thus facilitating the subsequent height measurement module 5 to measure the height.

[0036] A leveling assembly 12 is provided at each of the four corners of the lower end of the base plate 1. The leveling assembly 12 includes a U-shaped frame 1201 and adjusting feet 1202. The U-shaped frame 1201 is fixedly connected to each of the four corners of the lower end of the base plate 1. The adjusting feet 1202 are threadedly connected inside the U-shaped frame 1201. During operation, when the ground is uneven, the adjusting feet 1202 can be rotated. Since the adjusting feet 1202 are threadedly connected to the U-shaped frame 1201, the height of the adjusting feet 1202 can be adjusted. By adjusting the adjusting feet 1202 at the four corners, the base plate 1 can be kept level, thereby ensuring that the measurement data of the weighing module 6 is accurate.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A height and weight data acquisition system based on wristband QR code recognition, comprising a base plate (1), characterized in that: A first support column (2) is fixedly connected to the rear side of the upper end of the base plate (1). A second support column (3) is rotatably connected to the upper end of the first support column (2) via a hinge. A mounting plate (4) is rotatably connected to the upper end of the second support column (3) via a damping shaft. A height measurement module (5) is installed inside the mounting plate (4) at the end away from the second support column (3). A housing (8) is connected to the side end of the first support column (2) via an adjustment component (7). An antenna (16) is fixedly connected to the upper end of the housing (8). A display screen (9) and a QR code recognition module (10) are fixedly connected inside the front end of the housing (8). The QR code recognition module (10) is located at the lower end of the display screen (9). A weighing module (6) is fixedly connected to the upper end of the base plate (1); a motherboard (13) is fixedly connected inside the first support column (2), and a data processing module (17), a communication module (18) and a power supply module (19) are fixedly connected to the motherboard (13). The data processing module (17) is electrically connected to the QR code recognition module (10), the weighing module (6), the height measurement module (5), the communication module (18) and the display screen (9) respectively, and is used to receive identity information, weight data and height data, perform data integration and verification, and generate a complete data packet containing patient identity, weight, height and measurement time; the communication module (18) is electrically connected to the antenna (16).

2. The height and weight data acquisition system based on wristband QR code recognition according to claim 1, characterized in that: The adjustment component (7) includes a slide rail (701), a slide block (702), and a locking element (703). The slide rail (701) is fixedly connected to the side end of the first support column (2). The slide block (702) is slidably connected to the slide rail (701). The slide block (702) is fixedly connected to the housing (8). The locking element (703) is provided inside the slide block (702).

3. The height and weight data acquisition system based on wristband QR code recognition according to claim 2, characterized in that: The locking component (703) includes a locking bolt (7031) and a friction block (7032). The sliding block (702) is internally threaded with the locking bolt (7031), and the end of the locking bolt (7031) near the first support column (2) is rotatably connected to the friction block (7032).

4. The height and weight data acquisition system based on wristband QR code recognition according to claim 2, characterized in that: The first support column (2) is fixedly connected to a baffle (15) at its side end. There are two baffles (15), which are located at the upper and lower ends of the slide rail (701).

5. The height and weight data acquisition system based on wristband QR code recognition according to claim 1, characterized in that: The first support column (2) and the second support column (3) are provided with a fixing component (11) at their rear ends. The fixing component (11) includes a plate (1101), a slider (1102), a socket (1103), a U-shaped hole (1104), a screw (1105) and a nut (1106). The first support column (2) is fixedly connected to the socket (1103) at its rear end. The socket (1103) has a U-shaped hole (1104) on its rear end face. The second support column (3) has a sliding hole (14) on its rear end face. The slider (1102) is slidably connected inside the sliding hole (14). The slider (1102) is T-shaped. The plate (1101) is fixedly connected to the rear end of the slider (1102). The plate (1101) cooperates with the socket (1103). The screw (1105) is fixedly connected to the rear end of the plate (1101). The nut (1106) is threaded onto the screw (1105).

6. The height and weight data acquisition system based on wristband QR code recognition according to claim 1, characterized in that: The base plate (1) is provided with leveling components (12) at the four corners of the lower end. The leveling components (12) include U-shaped frames (1201) and adjusting pads (1202). The base plate (1) is fixedly connected to the four corners of the lower end with U-shaped frames (1201). The adjusting pads (1202) are threaded inside the U-shaped frames (1201).

7. The height and weight data acquisition system based on wristband QR code recognition according to claim 1, characterized in that: The height measurement module (5) includes an ultrasonic transmitting sensor and an ultrasonic receiving sensor; the ultrasonic transmitting sensor and the ultrasonic receiving sensor are used to transmit and receive reflected ultrasonic signals for calculating the patient's height.

8. The height and weight data acquisition system based on wristband QR code recognition according to claim 1, characterized in that: The QR code recognition module (10) uses an industrial-grade scanner to scan the patient's wristband QR code and obtain identity information.

9. A height and weight data acquisition system based on wristband QR code recognition according to claim 1, characterized in that: The weighing module (6) includes four pressure sensors and a weighing platform. The four pressure sensors are evenly distributed at the four corners of the bottom of the weighing platform to collect patient weight data and convert analog signals into digital signals.

10. A height and weight data acquisition system based on wristband QR code recognition according to claim 1, characterized in that: The communication module (18) supports Wi-Fi and Ethernet dual-mode communication, has a built-in encryption chip, and uses the HTTPS protocol for data transmission. It is used to encrypt and upload complete data packets to the hospital information system or electronic medical record system, and receive the upload status signal fed back by the system.

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