A neonatal treatment vehicle with urine volume data upload and a control method thereof

Abstract

The application discloses a neonatal treatment vehicle with urine volume data uploading and a control method thereof, which comprises a treatment vehicle body, a storage unit arranged in the treatment vehicle body and a universal wheel with a brake, and further comprises: a weighing platform with a platform frame and an electronic scale, an identity recognizer and a horizontal detection sensor integrated in the platform frame; an automatic leveling support mechanism arranged at the front end bottom of the platform frame; a power supply control group arranged at the rear end bottom of the platform frame, which comprises a control unit, a charging battery group for supplying power to the weighing platform and a wireless data transmission module; and a medical garbage can placing area arranged at the lower part of the treatment vehicle body. The application solves the problem of insufficient space of a traditional treatment vehicle table, integrates the originally dispersed storage, weighing, data recording and dirt treatment functions in one, and enables nurses to complete the whole process from taking and using a new diaper to weighing and recording without leaving the treatment vehicle, thereby improving work efficiency.

Description

Technical Field

[0001] This invention relates to the field of neonatal care devices, and in particular to a neonatal treatment cart with urine output data uploading capability and its control method. Background Technology

[0002] In current neonatal care, the common clinical practice is to weigh the infant before and after diaper changes using a separate electronic scale, and calculate the urine volume per cycle based on the difference. Nurses need to carry this separate scale between the nursing cart and the bed, find a suitable flat surface to place it on, manually record the readings, and then transcribe the data into the electronic medical record system. This process not only disrupts continuous nursing procedures and consumes a significant amount of time, but the manual transcription step is also highly prone to errors, making it difficult to guarantee data accuracy and timeliness.

[0003] Traditional treatment carts are used merely as mobile storage cabinets, their function disconnected from urine volume measurement procedures. The added independent electronic scale occupies valuable counter space and is prone to slipping when moved in crowded wards. Their storage, retrieval, and organization do not conform to efficient nursing workflow design. Some treatment carts feature a separate drawer for placing home or commercial-grade independent electronic scales. Although many modern scales have built-in software compensation algorithms to handle slight tilts, this compensation capability has limitations and is unreliable. When the scale is tilted, the component of gravitational acceleration in the sensor direction changes, causing fundamental errors in the readings. Built-in compensation algorithms can only make software corrections within a small angle range (usually 1-2 degrees) and cannot correct systematic measurement deviations caused by tilt. Furthermore, the existing drawers placed in the electronic scale treatment cart deform after repeated pushing and pulling or long-term use. In particular, the guide rails or connecting parts between the drawer and the treatment cart are difficult to keep level after being pulled out due to long-term stress deformation or gaps in the fit. It is obviously difficult to meet the accuracy and reliability of the urine volume data if the drawer is simply supported by the force on the guide rails on both sides to maintain a level state.

[0004] In addition to the deformation of drawers due to prolonged use causing horizontal deviations, the stability of the weighing environment is also difficult to guarantee. For example, after the treatment cart is moved between different beds, the ground where it stops often has a slight tilt. Even if some improvement solutions attempt to integrate a weighing platform into the treatment cart, when multiple infants need to be measured consecutively during a ward round, nurses may need to manually readjust the weighing platform after each movement of the treatment cart, or measurements may have to be taken in an uneven state, seriously affecting the reliability of the data. Summary of the Invention

[0005] The purpose of this invention is to provide a neonatal treatment vehicle with urine output data uploading and its control method, so as to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: This invention provides a neonatal treatment cart with urine output data uploading capability, comprising a cart body, a storage unit disposed within the cart body, and casters with brakes, and further comprising: The weighing platform has a platform frame and an electronic scale, an identification device and a level detection sensor integrated within the platform frame. The platform frame is set on the side of the main body of the treatment vehicle via a lateral pull-out rail. An automatic leveling support mechanism is located at the front bottom of the platform frame. It includes a scissor lift, a motor that drives the scissor lift, and a ground contact detection module for detecting whether the scissor lift is in contact with the ground. The power supply control group is located at the rear bottom of the platform frame. It includes a control unit, a rechargeable battery pack for powering the weighing platform, and a wireless data transmission module. The control unit is configured to perform the following steps: automatically bind the urine volume data obtained by the electronic scale with the infant identity information and weighing timestamp obtained by the identity reader, and upload it to the hospital's electronic medical record system through the wireless data transmission module. The medical waste bin placement area is located at the lower part of the main body of the treatment vehicle.

[0007] This invention utilizes a lateral sliding rail within the treatment cart to achieve a sliding weighing platform, solving the problem of insufficient platform space in traditional treatment carts. It pulls out when in use and pushes back in when not in use, integrating previously scattered storage, weighing, data recording, and waste disposal functions into one unit. Nurses can complete the entire process from retrieving new diapers to weighing and recording without leaving the treatment cart, improving work efficiency, meeting hospital infection control requirements, and reducing movement and cross-contamination risks during nursing procedures. By integrating an electronic scale, identification reader, and wireless transmission module, automated data transmission is achieved, avoiding transcription errors and time delays that may result from manual transcription, recall, and secondary input by nurses, ensuring the real-time nature, accuracy, and traceability of clinical data. An automatic leveling support mechanism ensures that the electronic scale always operates on a horizontal reference plane, thereby guaranteeing metrological accuracy and repeatability of the weighing data.

[0008] As a further improvement of the present invention: the front bottom of the platform frame is provided with a storage cavity, the scissor lift is completely housed in the storage cavity in the retracted state, the front and rear ends of the lateral pull-out track are provided with damping limiters, the platform frame is positioned by the damping limiters in the fully extended position, and the rear end of the platform frame forms a hinge point with slight pitch rotation in the fully extended position.

[0009] The improved design incorporates a concealed cavity that allows the automatic leveling support mechanism to be completely hidden when not in use, protecting it from impacts and maintaining a clean platform appearance. The damping limiter, which can be a hydraulic damper or a rubber buffer, ensures the platform frame stops smoothly and gently when pushed in and pulled out of its endpoint, avoiding impacts and noise, improving user experience, and ensuring precise positioning.

[0010] As a further improvement of the present invention: a start signal trigger is provided at the hinge point. The start signal trigger is used to send a motor start signal to the control unit when the platform frame is fully extended. The bottom of the scissor lift is equipped with universal casters. The start signal trigger is a microswitch, a Hall sensor (with a magnet), or an optocoupler sensor. When the platform frame reaches a predetermined position, the trigger mechanism is activated, generating a high / low level signal to the control unit. The universal casters provide the ability to move the weighing platform after it has been extended. For example, after urine output measurement and care at one bed, a short distance needs to be moved to another bed in the same room. This eliminates the need to retract the scissor lift and push back the weighing platform before moving, and to restart the extension support after the platform is in place, thus improving work efficiency.

[0011] As a further improvement of the present invention: an electrical compartment is provided at the rear end of the platform frame, and the rechargeable battery pack and wireless transmission module are housed in the electrical compartment. A cable passage hole or cable passage groove is provided between the electrical compartment and the space within the platform frame where the electronic scale is located. The electrical compartment achieves physical isolation and centralized management of strong and weak currents, and isolates the wireless module, which may generate electromagnetic interference, from the high-precision electronic scale sensor, ensuring the stability of the weighing signal.

[0012] As a further improvement of the present invention: the ground contact detection module is a motor current detection unit, which is configured to: monitor the operating current of the motor in real time; when the scissor lift extends downward to contact the ground, the motor load increases, causing the operating current to exceed the preset ground contact threshold, and the control unit determines that it has touched the ground.

[0013] This improved solution determines ground contact by monitoring motor current instead of using an external contact sensor, saving on additional sensor hardware, reducing costs, and improving reliability and lifespan in medical environments requiring frequent cleaning and disinfection.

[0014] As a further improvement of the present invention: an indicator light is provided on the top surface of the platform frame. The indicator light is electrically connected to the control unit, which is configured to: determine that the current state is a grounded state, send a first state signal to the indicator light to activate the indicator light and remind the user to release their hand or enter the self-leveling stage. The multi-state indicator light provides nurses with clear and intuitive human-computer interaction feedback, eliminating the need to guess the state; they can simply operate according to the light.

[0015] As a further improvement of the present invention: the level detection sensor is used to detect the tilt angle information of the platform frame, and it is electrically connected to the control unit. The control unit is configured to: receive the tilt angle information of the level detection sensor, determine the levelness of the platform frame based on the tilt angle information, and when the levelness of the platform frame reaches a preset threshold, drive the indicator light to display the normal use state and lock the current state of the motor.

[0016] This improved solution uses real-time feedback from a level detection sensor to dynamically control the motor to make minute adjustments, ensuring that the platform frame reaches and maintains a level measurement reference plane unaffected by the tilt of the treatment cart body. This eliminates the weighing principle error caused by the tilt of the platform frame and guarantees the medical-grade accuracy and repeatability of urine volume data.

[0017] As a further improvement of the present invention: the identification device is an RFID reader or a barcode scanner; the control unit is configured to unlock the weighing function of the electronic scale after the identification device successfully identifies the infant's identity information.

[0018] This improvement plan establishes an interlocking logic between the identification and weighing functions to ensure that each urine volume data is bound to the infant's identity information, thus preventing serious medical errors such as weighing before scanning, forgetting to scan after weighing, or data not matching the infant's identity due to nurses being busy, interrupted, or negligent.

[0019] On the other hand, the present invention also provides a control method for a neonatal treatment cart with urine volume data uploading, comprising the following steps: In response to a start signal, the start motor is activated to drive the scissor lift frame to extend downward, wherein the start signal is triggered by a start signal trigger when the platform frame is in the fully extended position; The motor current detection unit monitors the motor operating current in real time. When the operating current continuously exceeds the preset grounding threshold, it is determined that the motor has been grounded and a first status signal is sent to the indicator light to prompt the user that the platform frame has been grounded and supported. Upon entering the self-leveling stage, the tilt angle information of the level detection sensor is acquired in real time, and the motor is dynamically controlled to rotate forward or backward based on the tilt angle information. The height of the scissor lift frame is slightly adjusted until the levelness of the platform frame reaches the preset threshold. Then, the motor is locked and the indicator light is driven to emit a second status signal, indicating that the electronic scale is ready. After successfully binding the infant's identity by scanning the infant's identification mark with the identification device, the electronic scale weighs the infant. The control unit automatically packages the weighing data, the bound infant's identity information, and the timestamp, and uploads them to the electronic medical record system through the wireless data transmission module.

[0020] This invention provides a complete, intelligent, and error-proof closed-loop clinical operation system, transforming the complex leveling and data acquisition process into a simple and reliable automated workflow. Compared to traditional solutions, this embodiment can automatically reconstruct a precise level measurement benchmark even when the treatment cart moves within the patient room and stops on an inclined surface, solving the problem of inaccuracy due to movement. By guiding the operator through status signals and using identity recognition as a prerequisite for weighing, it not only ensures the accuracy of the data at the physical level but also guarantees its uniqueness and accuracy at the information level. This frees nurses from tedious manual leveling and recording, significantly improving work efficiency and eliminating human error.

[0021] As a further improvement to the present invention, it also includes: In the self-leveling stage, the tilt angle information fed back in real time by the level detection sensor is compared with the target level value to obtain the tilt angle deviation; Based on the tilt angle deviation, the number and direction of motor adjustment pulses required to eliminate the tilt angle deviation are calculated using an incremental PID control algorithm; The calculated number of motor adjustment pulses and the direction of the motor drive are used to adjust the motor until the level of the platform frame reaches a preset threshold.

[0022] This invention enables the leveling process to respond quickly to tilt angle deviations while avoiding overshoot and oscillations that may occur with traditional algorithms, ensuring the smoothness and speed of the leveling process. Compared to the limited software compensation or cumbersome manual leveling of traditional electronic scales, this invention ensures that optimal measurement conditions are actively and automatically provided at any location, guaranteeing the accuracy and convenience of clinical urine volume monitoring. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the neonatal treatment cart in the embodiment; Figure 2 This is a schematic diagram of the weighing platform in the pulled-out state according to an embodiment; Figure 3This is a schematic diagram of the bottom structure of the platform framework in the embodiment.

[0024] Figure 4 This is a flowchart illustrating the steps of the control method in the embodiment; Figure 5 This is a flowchart illustrating the steps of the self-leveling stage in an embodiment.

[0025] In the attached diagram: 100: main body of the treatment vehicle; 110: storage unit; 120: casters; 200: weighing platform; 210: platform frame; 220: lateral pull-out rail; 230: storage cavity; 240: electrical compartment; 250: cable routing hole; 300: electronic scale; 400: identification reader; 500: scissor lift; 510: casters; 600: medical waste bin placement area. Detailed Implementation

[0026] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0027] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0028] In the description of this invention, if there are words such as "several", they mean one or more, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.

[0029] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0030] Reference Figures 1 to 5 The following are several embodiments of a neonatal treatment vehicle with urine output data uploading according to the present invention.

[0031] Embodiments of the present invention provide a neonatal treatment cart with urine output data uploading capability, such as... Figure 1 and Figure 2As shown, the device includes a treatment cart body 100, a storage unit 110 disposed within the treatment cart body 100, and casters 120 with brakes, and also includes: The weighing platform 200 has a platform frame 210 and an electronic scale 300, an identification device 400 and a level detection sensor integrated in the platform frame 210. The platform frame 210 is set on the side of the treatment vehicle body 100 via a lateral pull-out rail 220. An automatic leveling support mechanism is located at the front bottom of the platform frame 210. It includes a scissor lift 500, a motor that drives the scissor lift 500, and a ground contact detection module for detecting whether the scissor lift 500 is in contact with the ground. The power supply control group is located at the rear bottom of the platform frame 210. It includes a control unit, a rechargeable battery pack that powers the weighing platform 200, and a wireless data transmission module. The control unit is configured to perform the following steps: automatically bind the urine volume data obtained by the electronic scale 300 with the infant identity information and weighing timestamp obtained by the identity reader 400, and upload it to the hospital's electronic medical record system through the wireless data transmission module. The medical waste bin placement area 600 is located at the lower part of the main body 100 of the treatment vehicle.

[0032] In this embodiment, the lateral pull-out rail is an industrially mature ball bearing slide rail or damping slide rail. Its fixed part is rigidly connected to the side of the treatment cart body through a bracket, and its movable part is connected to the platform frame. When installing the lateral pull-out rail, it should be installed horizontally. Therefore, in daily use, the weighing platform should also remain horizontal after being pulled out. Combining this with a scissor lift can better maintain the horizontal stability of the platform frame and increase the durability of the lateral pull-out rail. If the lateral pull-out rail undergoes slight deformation after prolonged use, causing the platform frame to tilt, this embodiment can also automatically level the platform by controlling the scissor lift to ensure that the plane of the electronic scale is always maintained within a reasonable level range. Those skilled in the art will understand that when the platform frame is fully pulled out and used for leveling, the rear end of the lateral pull-out rail (the end closer to the treatment cart body) allows the platform frame to rotate slightly about an axis (usually horizontal and perpendicular to the pulling direction). It can be connected to the main body of the treatment cart via a rotating shaft, which is mounted in a bearing housing. In this way, the entire lateral pull-out track, along with the platform frame, can rotate together around this rotating shaft. Alternatively, a locking pin mechanism can be used to lock the moving part and the fixed part horizontally. However, in the vertical direction, it can be achieved through an elastic element (such as a spring) or a ball joint connection. These are common methods for achieving the function of forming a hinge point at the end of the track and slide rail after pull-out, and this invention does not impose any limitations on them.

[0033] The platform frame in this embodiment is a rigid structural component that integrates an electronic scale, a level detection sensor (such as a MEMS tilt sensor), and an identification device (such as a scanner or RFID reader). The workflow begins with the nurse pulling the weighing platform out from the side of the treatment cart. Once fully extended, the automatic leveling support mechanism activates, driving the scissor lift to extend downwards and form support upon contact with the ground. Subsequently, the nurse scans the infant's wristband using the identification device, at which point the control unit is ready. The removed diaper is placed on the electronic scale, and the weighing data, infant identification, and operation timestamp are automatically bound by the control unit and transmitted in real time to the hospital's electronic medical record system via a wireless data transmission module (such as Wi-Fi), completing the data acquisition loop. Data transmission between functions can be achieved using common data transmission methods. After weighing and uploading the data for the diapers, the nurses directly discard the diapers from the electronic scale into the medical waste bin at the bottom of the treatment cart. This makes the process from weighing to disposal a continuous, non-moving action, avoiding the need for nurses to turn around to find a distant waste bin or bend down to dispose of the diapers in the garbage bags hanging next to the cart. In the high-frequency operation every day, these small improvements in efficiency accumulate and can save nurses a lot of working time and reduce their workload.

[0034] Those skilled in the art will understand that the power supply control group is located at the rear bottom of the platform frame for counterweight and wiring considerations. The control unit (such as STM32 series MCU), rechargeable battery pack (such as lithium-ion battery pack), and wireless data transmission module (such as Wi-Fi or Bluetooth module) are all mature commercial components, and their integration can be achieved using existing technologies. At the same time, the rechargeable battery pack can be charged by bringing out a charging interface or charging cable. This invention will not elaborate further on this.

[0035] This invention utilizes a lateral sliding rail within the treatment cart to achieve a sliding weighing platform, solving the problem of insufficient platform space in traditional treatment carts. It pulls out when in use and pushes back in when not in use, integrating previously scattered storage, weighing, data recording, and waste disposal functions into one unit. Nurses can complete the entire process from retrieving new diapers to weighing and recording without leaving the treatment cart, improving work efficiency, meeting hospital infection control requirements, and reducing movement and cross-contamination risks during nursing procedures. By integrating an electronic scale, identification reader, and wireless transmission module, automated data transmission is achieved, avoiding transcription errors and time delays that may result from manual transcription, recall, and secondary input by nurses, ensuring the real-time nature, accuracy, and traceability of clinical data. An automatic leveling support mechanism ensures that the electronic scale always operates on a horizontal reference plane, thereby guaranteeing metrological accuracy and repeatability of the weighing data.

[0036] In an optional embodiment, such asFigure 3 As shown, the platform frame 210 has a storage cavity 230 at the bottom of its front end. The scissor lift 500 is completely housed in the storage cavity 230 when it is retracted. The front and rear ends of the lateral pull-out track are provided with damping limiters. The platform frame 210 is positioned by the damping limiters when it is fully extended, and the rear end of the platform frame 210 forms a hinge point with slight pitch rotation when it is fully extended.

[0037] In this embodiment, the hinge point is a mounting base that allows for slight vertical movement of the lateral pull-out track's movable portion, or a ball bearing connection at the end of the track itself. This allows the rear end of the platform frame to rotate slightly about an axis when fully extended. The storage cavity in this embodiment allows the automatic leveling support mechanism to be completely concealed when not in use, protecting it from impacts and maintaining a clean platform appearance. The damping limiter can be a hydraulic damper or a rubber buffer block, ensuring the platform frame stops smoothly and gently when pushed in and pulled out, avoiding impacts and noise, improving user experience, and ensuring precise positioning.

[0038] In an optional embodiment, a start signal trigger is provided at the hinge point, which is used to trigger the sending of a motor start signal to the control unit when the platform frame is in the fully extended position, and the bottom of the scissor lift 500 is provided with universal sliding wheels 510.

[0039] In this embodiment, the start signal trigger is a microswitch, a Hall sensor (with a magnet), or an optocoupler sensor. When the platform frame reaches the predetermined position, the trigger mechanism is activated, generating a high / low level signal to the control unit. The omnidirectional casters provide the ability to move the weighing platform after it has been withdrawn. For example, after urine output measurement and care at one bed, the platform needs to be moved a short distance to another bed in the same room without having to retract the scissor lift and push the weighing platform back, or restart the deployment of the support after positioning, thus improving work efficiency.

[0040] In an optional embodiment, such as Figure 2 and Figure 3 As shown, an electrical compartment 240 is provided at the rear end of the platform frame 210. The rechargeable battery pack and the wireless transmission module are housed in the electrical compartment 240. A cable passage hole 250 or a cable passage groove is provided between the electrical compartment 240 and the space within the platform frame 210 where the electronic scale 300 is located. In this embodiment, the electrical compartment achieves physical isolation and centralized management of strong and weak currents, isolating the wireless module, which may generate electromagnetic interference, from the high-precision electronic scale sensor, thus ensuring the stability of the weighing signal.

[0041] In an optional embodiment, the ground contact detection module is a motor current detection unit, configured to: monitor the motor's operating current in real time; when the scissor lift extends downwards to contact the ground, the increased motor load causes the operating current to exceed a preset ground contact threshold, and the control unit determines that ground contact has occurred. The motor is a DC geared motor, and its operating current remains stable at a low value during no-load operation. When the scissor lift touches the ground, the motor's resistance torque increases sharply, and the armature current rises rapidly. The control unit can sample the current in real time via an ADC (analog-to-digital converter) and compare it with a preset ground contact threshold, typically set to 150%-200% of the motor's no-load current; the specific value needs to be determined after testing the prototype on a typical surface. The control unit monitors this current in real time, and when it continuously exceeds the preset ground contact threshold, it determines that ground contact has occurred.

[0042] This embodiment determines ground contact by monitoring motor current instead of using an external contact sensor, saving on additional sensor hardware, reducing costs, and improving reliability and lifespan in medical environments requiring frequent cleaning and disinfection. Furthermore, the current characteristics of motor stall or a sharp increase in load are very obvious and easily detected by the controller.

[0043] In an optional embodiment, an indicator light is provided on the top surface of the platform frame. The indicator light is electrically connected to a control unit, which is configured to: determine that the current state is a grounded state, and send a first state signal to the indicator light to activate the indicator light to remind the user to release the hand or enter the self-leveling stage.

[0044] In this embodiment, the indicator light is a multi-color LED, such as changing from blue to yellow, or a single-color light with a specific flashing pattern, such as changing from fast flashing to slow flashing. Its purpose is to provide a visually easily identifiable signal that distinguishes it from other states. After the control unit determines that the platform has touched the ground through current detection, it drives the indicator light to change its state and emits a first state signal, such as the indicator light changing from flashing blue to solid yellow, intuitively conveying the information "supported, can be released, leveling is underway." The indicator light is configured to: flash blue when not touching the ground; turn solid yellow upon receiving the first state signal (grounded); and turn solid green upon receiving the second state signal (leveling complete). The second state signal (weighing ready) ensures that weighing is only performed after the platform reaches the horizontal reference range, thus forcibly guaranteeing measurement accuracy from a procedural standpoint. The multi-state indicator light provides nurses with clear and intuitive human-computer interaction feedback, eliminating the need to guess the state; they can simply operate based on the light.

[0045] In an optional embodiment, the level detection sensor is used to detect the tilt angle information of the platform frame. It is electrically connected to the control unit. The control unit is configured to: receive the tilt angle information from the level detection sensor, determine the levelness of the platform frame based on the tilt angle information, and when the levelness of the platform frame reaches a preset threshold, drive the indicator light to display the normal use status and lock the current status of the motor.

[0046] In this embodiment, the preferred level detection sensor is a digital MEMS (Micro-Electro-Mechanical Systems) tilt sensor. The preset threshold is a small angle value, such as ±0.1° to ±0.5°. This threshold needs to be set according to the stringent levelness requirements of the electronic scale during high-precision weighing. The control unit continuously reads the X and Y axis data from the tilt sensor and calculates the composite tilt angle. This tilt angle is compared with the preset threshold. If it does not meet the standard, the number of pulses required for the motor to rotate is calculated using a PID control algorithm based on the magnitude and direction of the deviation, driving the motor for fine-tuning. The calculation method is implemented using existing technology. Once the tilt angle enters the threshold range and remains stable, the control unit immediately stops the motor and locks its position. The current state of the locked motor is achieved by the control unit outputting a holding torque to the motor or triggering an electromagnetic brake. For example, electronic locking: for servo motors or stepper motors with encoders, locking is achieved by the control unit continuously outputting a holding torque. Even if the motor is stationary, the coil is still energized to resist external forces. Mechanical locking: an electromagnetic brake is integrated into the motor or transmission chain. It is released when energized and locked when de-energized. After leveling is completed, the control unit can energize the brake to lock it.

[0047] This embodiment uses real-time feedback from a level detection sensor to dynamically control the motor to make minute adjustments, ensuring that the platform frame reaches and maintains a level measurement reference plane that is unaffected by the tilt of the treatment cart body. This eliminates the weighing principle error caused by the tilt of the platform frame and guarantees the medical-grade accuracy and repeatability of urine volume data.

[0048] In an optional embodiment, the identification device is an RFID reader or a barcode scanner; the control unit is configured to unlock the weighing function of the electronic scale after the identification device successfully identifies the infant's identity information.

[0049] In this embodiment, after the platform framework is leveled and ready, the weighing function of the electronic scale is locked, meaning that its data will not be recorded or uploaded by the system. Only when the nurse successfully scans the wristband with the identity reader and the control unit verifies the information is valid will an unlock command be sent to the electronic scale. This command can be a specific level signal or a command sent through a communication protocol (such as UART) to make the electronic scale enter the recordable state from the standby state.

[0050] This embodiment establishes an interlocking logic between the identity recognition and weighing functions to ensure that each urine volume data is bound to the infant's identity information, thus preventing serious medical errors such as weighing before scanning, forgetting to scan the code after weighing, or data not matching the infant's identity due to nurses being busy, interrupted, or negligent.

[0051] On the other hand, another embodiment of the present invention also provides a control method for a neonatal treatment cart with urine volume data uploading, such as... Figure 4 As shown, it includes the following steps: In response to a start signal, the start motor is activated to drive the scissor lift frame to extend downward, wherein the start signal is triggered by a start signal trigger when the platform frame is in the fully extended position; The motor current detection unit monitors the motor operating current in real time. When the operating current continuously exceeds the preset grounding threshold, it is determined that the motor has been grounded and a first status signal is sent to the indicator light to prompt the user that the platform frame has been grounded and supported. Upon entering the self-leveling stage, the tilt angle information of the level detection sensor is acquired in real time, and the motor is dynamically controlled to rotate forward or backward based on the tilt angle information. The height of the scissor lift frame is slightly adjusted until the levelness of the platform frame reaches the preset threshold. Then, the motor is locked and the indicator light is driven to emit a second status signal, indicating that the electronic scale is ready. After successfully binding the infant's identity by scanning the infant's identification mark with the identification device, the electronic scale weighs the infant. The control unit automatically packages the weighing data, the bound infant's identity information, and the timestamp, and uploads them to the electronic medical record system through the wireless data transmission module.

[0052] This embodiment provides a complete, intelligent, and error-proof clinical operation loop, transforming the complex leveling and data acquisition process into a simple and reliable automated workflow. Compared to traditional solutions, this embodiment can automatically reconstruct a precise level measurement benchmark when the treatment cart moves within the patient room, even when stopped on an inclined surface, solving the problem of inaccuracy upon movement. By guiding the operator through status signals and using identity recognition as a prerequisite for weighing, it not only ensures the accuracy of the data at the physical level but also guarantees its uniqueness and accuracy at the information level. This frees nurses from tedious manual leveling and recording, significantly improving work efficiency and eliminating human error.

[0053] In traditional methods, the level of the weighing platform may be disrupted after the treatment cart is moved, requiring nurses to manually level it or accept the error and continue measuring. This embodiment, through a self-leveling phase, can adjust in real time according to different elevations and ground surfaces. During short-distance movements, such as between two beds a few beds apart in a ward, there's no need to retract the scissor lift and push back the weighing platform. The treatment cart can be moved directly, and once the target position is reached, the level detection sensor acquires the tilt angle information at the current position. Based on this tilt angle information, the motor is dynamically controlled to rotate forward or backward, making minor adjustments to the height of the scissor lift until the platform frame's level reaches a preset threshold. Then, the motor is locked, and the indicator light emits a second status signal, indicating that the electronic scale is ready. This means that the weighing platform can automatically maintain a level state during continuous ward rounds. It ensures that no matter where the treatment cart is parked, its weighing platform can always quickly and automatically return to an ideal level state, guaranteeing that repeated manual adjustments are unnecessary when measuring multiple infants consecutively.

[0054] In an optional embodiment, such as Figure 5 As shown, the control method further includes: In the self-leveling stage, the tilt angle information fed back in real time by the level detection sensor is compared with the target level value to obtain the tilt angle deviation; Based on the tilt angle deviation, the number and direction of motor adjustment pulses required to eliminate the tilt angle deviation are calculated using an incremental PID control algorithm; The calculated number of motor adjustment pulses and the direction of the motor drive are used to adjust the motor until the level of the platform frame reaches a preset threshold.

[0055] Those skilled in the art will understand that PID stands for Proportional (P), Integral (I), and Derivative (D). The incremental algorithm outputs the increment of the control quantity (Δu), that is, the change in the current output relative to the previous output. Its formula can be simplified to: Δu = Kp*(e(k)-e(k-1)) + Ki*e(k) + Kd*(e(k)-2e(k-1)+e(k-2)). Here, e(k) is the current tilt angle deviation, and Kp, Ki, and Kd are parameters that need to be tuned, which can be determined through the Ziegler-Nichols method or experimental trial and error. This incremental PID control algorithm is prior art; parts not described can be implemented using existing technologies and will not be elaborated upon here.

[0056] The algorithm in this embodiment is executed periodically, such as every 10ms, including: Read the current tilt angle information and calculate the deviation e(k) from the horizontal target value; Substitute the current and previous two deviations into the incremental PID formula to calculate the number of pulses Δu that the motor needs to adjust. Based on the sign and magnitude of Δu, the motor is driven by corresponding pulses. This process is repeated until the deviation e(k) approaches zero.

[0057] This embodiment employs incremental PID control, which has inherent advantages over positional PID control in terms of resisting integral saturation, achieving smooth control, and seamless switching between manual and automatic operation. For example, when the platform is accidentally pushed down manually, the algorithm outputs a small adjustment increment rather than an absolute position command, avoiding sudden and violent motor movements, protecting the mechanism, and making the leveling process smoother. When the treatment cart moves, causing the platform to tilt slightly, the algorithm incorporates the trend of tilt angle deviation (differential term D) into the calculation. If the platform is rapidly deviating from level (e.g., the wheels cross a threshold), the differential term will generate a large correction, suppressing the tilting trend in advance. When approaching level, the proportional term (P) and integral term (I) dominate, performing fine calibration. This allows the control method in this embodiment to quickly respond to dynamic disturbances caused by the movement of the treatment cart, always maintaining platform stability.

[0058] This invention enables the leveling process to respond quickly to tilt angle deviations while avoiding overshoot and oscillations that may occur with traditional algorithms, ensuring the smoothness and speed of the leveling process. Compared to the limited software compensation or cumbersome manual leveling of traditional electronic scales, this invention ensures that optimal measurement conditions are actively and automatically provided at any location, guaranteeing the accuracy and convenience of clinical urine volume monitoring.

[0059] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A neonatal treatment cart with urine output data uploading capability, comprising a cart body (100), a storage unit (110) disposed within the cart body (100), and casters (120) with brakes, characterized in that, Also includes: The weighing platform (200) has a platform frame (210) and an electronic scale (300), an identification device (400) and a level detection sensor integrated in the platform frame (210). The platform frame (210) is set on the side of the treatment cart body (100) via a lateral pull-out rail (220). An automatic leveling support mechanism is provided at the front bottom of the platform frame (210), which includes a scissor lift (500), a motor for driving the scissor lift (500), and a ground contact detection module for detecting whether the scissor lift (500) is in contact with the ground. The power supply control group is located at the rear bottom of the platform frame (210), and includes a control unit, a rechargeable battery pack for powering the weighing platform (200), and a wireless data transmission module. The control unit is configured to perform the following steps: automatically bind the urine volume data obtained by the electronic scale (300) with the infant identity information and weighing timestamp obtained by the identity reader (400), and upload it to the hospital's electronic medical record system through the wireless data transmission module. A medical waste bin placement area (600) is located at the lower part of the main body (100) of the treatment vehicle.

2. The neonatal treatment cart with urine output data uploading capability according to claim 1, characterized in that: The platform frame (210) has a storage cavity (230) at the bottom of its front end. The scissor lift (500) is completely housed in the storage cavity (230) in the retracted state. The lateral pull-out rail (220) has damping limiters at both ends. The platform frame (210) is positioned by the damping limiters in the fully extended position, and the rear end of the platform frame (210) forms a hinge point with slight pitch rotation in the fully extended position.

3. A neonatal treatment cart with urine output data uploading capability according to claim 2, characterized in that: A start signal trigger is provided at the hinge point. The start signal trigger is used to send a motor start signal to the control unit when the platform frame (210) is in the fully extended position. The bottom of the scissor lift (500) is provided with universal sliding wheels (510).

4. A neonatal treatment cart with urine output data uploading capability according to claim 1, characterized in that: The platform frame (210) has an electrical compartment (240) at its rear end. The rechargeable battery pack and the wireless transmission module are located in the electrical compartment (240). A cable passage hole (250) or a cable passage groove is provided between the electrical compartment (240) and the space inside the platform frame (210) where the electronic scale (300) is located.

5. A neonatal treatment cart with urine output data uploading capability according to claim 1, characterized in that: The ground contact detection module is a motor current detection unit, which is configured to: monitor the operating current of the motor in real time; when the scissor lift (500) extends downward to contact the ground, the motor load increases, causing the operating current to exceed the preset ground contact threshold, and the control unit determines that it has touched the ground.

6. A neonatal treatment cart with urine output data uploading capability according to claim 5, characterized in that: An indicator light is provided on the top surface of the platform frame (210). The indicator light is electrically connected to the control unit. The control unit is configured to: determine that the current state is a state of being in contact with the ground, and send a first state signal to the indicator light to activate the indicator light to remind the user to release the hand or enter the self-leveling stage.

7. A neonatal treatment cart with urine output data uploading capability according to claim 6, characterized in that: The horizontal detection sensor is used to detect the tilt angle information of the platform frame (210). It is electrically connected to the control unit. The control unit is configured to: receive the tilt angle information of the horizontal detection sensor, determine the levelness of the platform frame (210) based on the tilt angle information, and drive the indicator light to display the normal use status and lock the current status of the motor when the levelness of the platform frame (210) reaches a preset threshold.

8. A neonatal treatment cart with urine output data uploading capability according to claim 1, characterized in that: The identification device (400) is an RFID reader or a barcode scanner; the control unit is configured to unlock the weighing function of the electronic scale (300) after the identification device (400) successfully identifies the infant's identity information.

9. A control method for a neonatal treatment cart with urine output data uploading as described in any one of claims 1-8, characterized in that: Includes the following steps: In response to a start signal, the start motor is activated to drive the scissor lift (500) to extend downward, wherein the start signal is triggered by a start signal trigger when the platform frame (210) is in the fully extended position; The motor current detection unit monitors the motor operating current in real time. When the operating current continuously exceeds the preset grounding threshold, it is determined that the motor has been grounded and sends a first status signal to the indicator light to prompt the user that the platform frame (210) has been grounded and supported. Entering the self-leveling stage, the tilt information of the horizontal detection sensor is obtained in real time, and the motor is dynamically controlled to rotate forward or backward according to the tilt information. The height of the scissor lift frame (500) is slightly adjusted until the level of the platform frame (210) reaches the preset threshold. Then the motor is locked and the indicator light is driven to emit a second status signal, indicating that the electronic scale (300) is ready. After successfully binding the infant's identity using the identity scanner (400), the electronic scale (300) weighs the infant. The control unit automatically packages the weighing data, the bound infant's identity information, and the timestamp, and uploads them to the electronic medical record system through the wireless data transmission module.

10. The control method according to claim 9, characterized in that, Also includes: In the self-leveling stage, the tilt angle information fed back in real time by the level detection sensor is compared with the target level value to obtain the tilt angle deviation; Based on the tilt angle deviation, the number and direction of motor adjustment pulses required to eliminate the tilt angle deviation are calculated using an incremental PID control algorithm; The calculated number of motor adjustment pulses and the direction of the motor are used to adjust the motor until the level of the platform frame (210) reaches a preset threshold.

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