A multifunctional testing device simulating real use scenarios of paper diapers

Abstract

The application provides a multifunctional testing device for simulating a real use scene of a paper diaper, and relates to the technical field of paper diaper performance detection. The multifunctional testing device comprises a base, a large arm connected to the base, a first rotating component arranged on the large arm, a small arm rotatably connected to the large arm through the first rotating component, a turning flange connected to the small arm, a second rotating component arranged on the turning flange, a baby posture simulation model connected to the output end of the second rotating component, a liquid simulation unit in communication with the baby posture simulation model through a liquid pipeline, a temperature control unit connected to the liquid simulation unit, a gas simulation unit arranged in the baby posture simulation model and used for outputting gas, a sensing unit arranged on the surface and / or inside of the baby posture simulation model, and a control unit electrically connected to the first rotating component, the second rotating component, the liquid simulation unit, the temperature control unit, the gas simulation unit and the sensing unit respectively.

Description

Technical Field

[0001] This invention relates to the field of diaper performance testing technology, and more specifically, to a multifunctional testing device that simulates real-world diaper usage scenarios. Background Technology

[0002] As a core product in daily infant care, the absorbency, breathability, leak-proofness, and comfort of diapers directly impact their effectiveness. Therefore, a testing method and device are needed to accurately and comprehensively evaluate their performance. Currently, most performance testing devices in this field employ planar static testing methods, such as applying a fixed load in a single direction or conducting static liquid absorption tests to assess the product's basic parameters.

[0003] However, existing testing methods have significant drawbacks. First, they cannot simulate real-world usage scenarios. Infants adopt various postures during daily activities, such as sitting, lying down, and prone, and these dynamic activities lead to uneven pressure distribution on the diaper. Static testing cannot reflect changes in fit and pressure distribution during actual use. Second, existing devices typically do not consider the impact of environmental parameters such as body temperature and humidity on material performance, resulting in deviations between testing conditions and actual conditions. Finally, the testing process lacks automation, often requiring frequent manual adjustments to testing posture or parameters, which is not only inefficient but also prone to introducing human error.

[0004] In summary, existing diaper performance testing devices are inadequate in terms of scenario simulation, environmental parameter simulation, and automation level. As a result, their test results cannot fully and accurately reflect the comprehensive performance of the product in actual use, and cannot provide sufficient reliable data support for product design and optimization. Summary of the Invention

[0005] The present invention provides a multifunctional testing device that simulates the real-world use of diapers, aiming to improve at least one of the aforementioned technical problems.

[0006] To address the aforementioned technical problems, this invention provides a multifunctional testing device that simulates the real-world use of diapers. The device comprises a base, a large arm, a first rotating component, a small arm, a turning flange, a second rotating component, an infant body simulation model, a liquid simulation unit, a temperature control unit, a gas simulation unit, a sensing unit, and a control unit.

[0007] The upper arm is attached to the base.

[0008] The first rotating assembly is located on the boom.

[0009] The forearm is rotatably connected to the upper arm via the first rotating assembly.

[0010] The bend flange is engaged with the forearm.

[0011] The second rotating assembly is disposed on the bending flange.

[0012] The infant posture simulation model is connected to the output end of the second rotation component.

[0013] The liquid simulation unit is connected to the infant body posture simulation model via an infusion line.

[0014] The temperature control unit is connected to the liquid simulation unit.

[0015] The gas simulation unit is located inside the infant body simulation model and is used to output gas that can test the air permeability of the diaper.

[0016] The sensing unit is disposed on the surface and / or inside the infant body posture simulation model.

[0017] The control unit is electrically connected to the first rotating assembly, the second rotating assembly, the liquid simulation unit, the temperature control unit, the gas simulation unit, and the sensing unit, respectively.

[0018] The upper arm and the lower arm are both hollow structures, and the data transmission line and the infusion pipeline pass through the upper arm, the first rotating component, the lower arm and the second rotating component.

[0019] As a further optimization, the upper arm, the lower arm, and the base are all made of metal.

[0020] Both the first rotating component and the second rotating component are provided with hollow channels.

[0021] The infusion tube route passes sequentially through the base, the upper arm, the first rotating component, the forearm, and the second rotating component before extending to the infant body simulation model.

[0022] As a further optimization, the infant body posture simulation model has a first fluid outlet at the front. The infant body posture simulation model also has a second fluid outlet at the lower back. Both the first and second fluid outlets are connected to the infusion tubing.

[0023] The gas simulation unit includes an air pump and an air path. The air path is disposed within the infant body posture simulation model, and the air outlet of the air pump is connected to the air path. The air outlet of the air path is located on the surface and / or internal test area of ​​the infant body posture simulation model.

[0024] As a further optimization, the infant body posture simulation model includes a torso that is rotatably mounted on the thighs of the torso.

[0025] The infant body posture simulation model is equipped with a stepper motor and a linkage mechanism. The stepper motor is fixed inside the infant body posture simulation model. The linkage mechanism is driven between the stepper motor and the thigh, so that the stepper motor can drive the thigh to rotate.

[0026] As a further optimization, the first rotating component includes a first reducer, a first large gear, a first small gear, and a first servo motor.

[0027] The first reducer is located at the top of the boom.

[0028] The first large gear is fixedly connected to one end of the forearm.

[0029] The first reducer is rotatably connected to the forearm via a bearing.

[0030] The first servo motor is mounted on the first reducer, and the first pinion is provided on the output shaft of the first servo motor. The first pinion meshes with the first gear.

[0031] As a further optimization, the bend flange is fixedly connected to the forearm, and the mounting surface of the bend flange is perpendicular to the axis of the forearm.

[0032] The second rotating assembly includes a sleeve, a second large gear, a second small gear, and a second servo motor.

[0033] The sleeve is mounted on the bend flange via a bearing.

[0034] The second large gear is fixedly connected to the sleeve.

[0035] The second servo motor is mounted on the bending flange, and the output shaft of the second servo motor is provided with the second pinion, which meshes with the second large gear.

[0036] The infant body posture simulation model is installed at the output end of the sleeve.

[0037] As a further optimization, a mounting cavity is formed inside the base. The liquid simulation unit and the temperature control unit are located in the mounting cavity.

[0038] The liquid simulation unit includes a water tank and a water pump, both of which are housed within the base. The inlet of the water pump is connected to the water tank, and the outlet of the water pump is connected to the infusion pipeline.

[0039] The temperature control unit includes a heater, which is disposed inside the base and connected to the water tank.

[0040] As a further optimization, the sensing unit includes a pressure sensor, a temperature sensor, a humidity sensor, and a barometric pressure sensor.

[0041] The pressure sensors are arranged in an array on the surface of the infant body simulation model.

[0042] The temperature sensor, humidity sensor, and air pressure sensor are disposed on the surface and / or inner wall of the infant body simulation model.

[0043] As a further optimization, the multifunctional testing device simulating real-world diaper usage scenarios also includes an operation screen disposed on the base. The control unit is disposed on the operation screen and / or the base.

[0044] The control unit includes a control chip and a data processing module, and the control chip is disposed in the operation screen and / or the base.

[0045] The control chip is electrically connected to the first servo motor, the second servo motor, the stepper motor, the water pump, the heater, and the air pump, respectively.

[0046] The data processing module is connected to the sensing unit and the operation screen via signals.

[0047] As a further optimization, the operation screen is a touch display screen.

[0048] The base has a recessed water tank on top for collecting the test liquid that is exposed during the test.

[0049] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0050] This invention boasts a high degree of simulation, realistically reproducing the actual usage state of an infant. The device dynamically simulates various infant postures, including sitting, lying down, prone, rolling over, and leg kicking, through a multi-axis rotating robotic arm and a movable bionic infant model. Combined with a temperature-controlled liquid simulation unit and a gas simulation unit, it replicates the infant's body temperature, excrement, and surface microenvironment, thus overcoming the shortcomings of traditional planar static testing that cannot reflect complex real-world scenarios, resulting in more comprehensive and realistic test results.

[0051] Secondly, the detection accuracy and data comprehensiveness of this invention are significantly improved. By integrating a dense array of pressure, temperature, humidity, and air pressure sensors on and inside the infant model, it is possible to synchronously, in real time, and with high precision collect multi-dimensional data such as pressure distribution, absorbency, backflow, and breathability of the diaper under different dynamic postures, thereby achieving a more reliable and detailed evaluation of product performance. Furthermore, this invention achieves a high degree of automation and intelligence in the testing process. Through an integrated control unit, a complete testing process including various posture changes, liquid discharge, and dynamic simulation can be preset and automatically executed, automatically processing sensor data and generating evaluation reports, greatly reducing manual intervention and improving testing efficiency and consistency. Attached Figure Description

[0052] To more clearly illustrate the technical solutions of the specific embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0053] Figure 1 This is a schematic diagram of the overall structure of the multifunctional testing device.

[0054] Figure 2 This is an exploded view of the overall structure of the multifunctional testing device.

[0055] Figure 3 This is a schematic diagram of the interior of the base of the multifunctional testing device.

[0056] Figure 4 This is a schematic diagram of the one-axis joint structure of a multi-functional testing device.

[0057] Figure 5 This is a schematic diagram of the biaxial joint structure of a multifunctional testing device.

[0058] Figure 6 This is a schematic diagram of the internal structure of an infant model of a multifunctional testing device.

[0059] The diagram is labeled as follows: 1-Operating screen, 11-Water pump, 12-Water tank, 13-Heater, 2-Base, 3-Large arm, 31-Data transmission line, 32-First large gear, 33-First servo motor, 34-First small gear, 4-First reducer, 5-Forearm, 51-Second servo motor, 52-Second small gear, 53-Second large gear, 6-Turn flange, 7-Infant body simulation model, 71-Stepper motor, 72-Connecting rod, 73-Air pump, 74-Pressure sensor, 75-Temperature sensor, 76-Humidity sensor, 77-Air pressure sensor. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0061] Depend on Figures 1 to 6 As shown, this invention provides a multifunctional testing device for the high-performance of diapers, capable of dynamically simulating infant posture, activity, and environmental parameters, and accelerating testing efficiency. This device integrates various testing equipment and methods, introducing dynamic simulation parameters to achieve a high-precision, high-efficiency testing process, overcoming the shortcomings of distortion in real-world usage scenarios and insufficient automation.

[0062] The multifunctional testing device includes a base 2, a large arm 3, a first rotating assembly, a small arm 5, a turning flange 6, a second rotating assembly, an infant body simulation model 7, a liquid simulation unit, a temperature control unit, a gas simulation unit, a sensing unit, and a control unit.

[0063] The upper arm 3 is engaged with the base 2. A first rotating assembly is disposed on the upper arm 3. The lower arm 5 is rotatably connected to the upper arm 3 via the first rotating assembly. A bend flange 6 is engaged with the lower arm 5. A second rotating assembly is disposed on the bend flange 6. An infant body posture simulation model 7 is engaged with the output end of the second rotating assembly. A liquid simulation unit is connected to the infant body posture simulation model 7 via an infusion line. A temperature control unit is engaged with the liquid simulation unit. A gas simulation unit is disposed within the infant body posture simulation model 7 and is used to output gas capable of testing the air permeability of diapers. A sensing unit is disposed on the surface and / or inside the infant body posture simulation model 7. A control unit is electrically connected to the first rotating assembly, the second rotating assembly, the liquid simulation unit, the temperature control unit, the gas simulation unit, and the sensing unit, respectively.

[0064] The base 2 has a recessed water tank on its top for collecting the test liquid that is exposed during the test.

[0065] The upper arm 3 and the lower arm 5 are both hollow structures, and the data transmission line 31 and the infusion pipeline pass through the upper arm 3, the first rotating component, the lower arm 5 and the second rotating component.

[0066] The aforementioned structural components together constitute the core testing system of this invention. The base 2 provides a stable support foundation for the entire device, ensuring the stability and accuracy of mechanical movement during testing. The upper arm 3 and lower arm 5, as the main motion transmission components, can flexibly adjust the spatial position of the infant model. The first and second rotation components drive the rotation of the upper arm 3 and lower arm 5 respectively, achieving multi-degree-of-freedom movement. The turning flange 6 is used to change the direction of movement, making the model's posture more varied. The infant body simulation model 7 is the carrier for directly wearing the diaper; its biomimetic design can realistically reproduce the infant's body characteristics. The liquid simulation unit, temperature control unit, and gas simulation unit respectively simulate the infant's excrement, body temperature, and surface microenvironment, making the testing conditions closer to reality. The sensing unit is responsible for real-time acquisition of multi-dimensional data on the contact surface between the diaper and the model. The control unit coordinates the actions of each execution component and processes the sensor data to achieve automated testing. Through the collaborative work of these components, this invention can comprehensively and realistically evaluate the overall performance of the diaper in actual use scenarios.

[0067] The upper arm 3, a crucial component connecting the upper and lower parts, is fixed at one end to the base 2 and connected to the lower arm 5 via the first rotating assembly, allowing the lower arm 5 to rotate relative to the upper arm 3, thus simulating the swaying of an infant's upper body. The setting of the turning flange 6 ensures that the mounting surface of the second rotating assembly is perpendicular to the axis of the lower arm 5, enabling the infant body simulation model 7 to rotate laterally and simulate movements such as rolling over. The liquid simulation unit delivers simulated urine to specific parts of the model via infusion tubing, while the temperature control unit ensures the liquid temperature is close to human body temperature. The gas simulation unit releases gas into the diaper test area through internal gas channels to assess breathability. Sensing units distributed on the model's surface and inside can sense parameters such as pressure, temperature, humidity, and air pressure in real time. The control unit, as the central hub, coordinates the timing and parameters of each actuator, ensuring the automation and accuracy of the testing process. This integrated design eliminates the need for manual intervention during testing and allows for simultaneous acquisition of multi-source data, significantly improving testing efficiency and data reliability.

[0068] The hollow structure of the upper arm 3 and lower arm 5 is a key design feature of this device. The data transmission line 31 and infusion tubing are housed within this structure, not only simplifying the overall appearance and avoiding potential entanglement or wear from exposed tubing, but more importantly, this wiring method does not interfere with the robotic arm's range of motion, allowing the upper arm 3 and lower arm 5 to rotate freely at large angles without being restricted by the tubing. Simultaneously, the built-in tubing is protected by the arm body during movement, extending its service life and improving the system's reliability and safety. The first and second rotating components also feature hollow channels, ensuring that the wiring and tubing can continuously run through the entire robotic arm system, smoothly reaching the infant body simulation model 7.

[0069] Based on the above embodiments, in an optional embodiment of the present invention, such as Figure 4 and Figure 5 As shown, the upper arm 3, the lower arm 5, and the base 2 are all made of metal. Both the first rotating assembly and the second rotating assembly have hollow channels. The infusion tube route passes sequentially through the base 2, the upper arm 3, the first rotating assembly, the lower arm 5, and the second rotating assembly before extending to the infant body simulation model 7.

[0070] This embodiment further defines the materials and channel structure of key components. The base 2, upper arm 3, and lower arm 5 are manufactured using metal materials (such as stainless steel), providing sufficient mechanical strength and rigidity to withstand repeated loads during dynamic testing, ensuring long-term stability and accuracy. Metal materials also possess good corrosion resistance, resisting the erosion of test liquids such as simulated urine. The hollow channel design of the first and second rotating components allows the infusion tubing to pass directly from the inside of the base 2 to the infant model, forming a concealed and continuous delivery path. This layout is not only aesthetically pleasing but, more importantly, avoids bending or compression of the tubing at joint movements, ensuring the continuity and stability of simulated urine delivery.

[0071] Preferred, such as Figure 4 As shown, the first rotating assembly includes a first reducer 4, a first large gear 32, a first small gear 34, and a first servo motor 33.

[0072] The first reducer 4 is located at the top of the boom 3.

[0073] The first large gear 32 is fixedly connected to one end of the forearm 5.

[0074] The first reducer 4 is rotatably connected to the forearm 5 via a bearing.

[0075] The first servo motor 33 is mounted on the first reducer 4, and the first pinion 34 is provided on the output shaft of the first servo motor 33. The first pinion 34 meshes with the first gear 32.

[0076] The first rotating assembly employs a servo motor, reducer, and gear transmission structure to achieve precise control of the forearm 5's rotational movement. The first reducer 4, mounted at the top, not only provides support but also reduces rotational speed and increases torque, resulting in smoother and more powerful rotation of the forearm 5. The first servo motor 33 serves as the power source, with its output shaft's first pinion 34 meshing with the first large gear 32 fixed to the forearm 5, forming a single-stage reduction transmission. This gear transmission method offers advantages such as accurate transmission ratio, high efficiency, and long lifespan. By controlling the servo motor's rotation angle, the forearm 5 can be precisely driven to rotate to any angle, thus simulating the tilting and swaying of the infant's body in different postures. The bearing connection between the first reducer 4 and the forearm 5 ensures smooth rotation and reduces frictional resistance. Overall, this assembly makes the forearm 5's movement both flexible and precise, realistically replicating the dynamic process of an infant's activities.

[0077] Preferred, such as Figure 5 As shown, the bending flange 6 is fixedly connected to the forearm 5, and the mounting surface of the bending flange 6 is perpendicular to the axis of the forearm 5.

[0078] The second rotating assembly includes a sleeve, a second large gear 53, a second small gear 52, and a second servo motor 51.

[0079] The sleeve is mounted on the bend flange 6 via a bearing.

[0080] The second large gear 53 is fixedly connected to the sleeve.

[0081] The second servo motor 51 is mounted on the bending flange 6, and the output shaft of the second servo motor 51 is provided with the second pinion 52, which meshes with the second gear 53.

[0082] The infant body posture simulation model 7 is installed at the output end of the sleeve.

[0083] The design of the transition flange 6 ensures that the installation direction of the second rotating component is perpendicular to the axis of the forearm 5, thus providing the infant posture simulation model 7 with a rotational degree of freedom about the axis perpendicular to the forearm 5. The second rotating component also employs a servo motor and gear transmission scheme: the second servo motor 51 is fixed to the transition flange 6, and its output shaft has a second pinion 52 meshing with a second large gear 53 fixed to the sleeve, driving the sleeve to rotate relative to the transition flange 6. The sleeve is mounted on the transition flange 6 via bearings, ensuring smooth rotation. The infant posture simulation model 7 is installed at the output end of the sleeve, thus enabling lateral rotation to simulate actions such as lying on its side and rolling over. This compact structure and direct transmission allow for precise control of the model's rotation angle and speed. Combined with the first rotating component, it enables the infant model to achieve complex posture transformations in space, greatly enhancing the realism of the test scenario.

[0084] like Figure 1 and Figure 2 As shown, the various parts of the device are connected by bolts. The touchscreen display is connected to the base 2 and controls the liquid system, gas system, temperature control system, and data processing system. The base 2 is fixedly connected to the upper arm 3. The top of the upper arm 3 is connected to the first reducer 4. The first reducer 4 is connected to the lower arm 5 and driven by the first servo motor 33, providing axial rotation to simulate the swaying of an infant's body during daily activities. The lower arm 5 is connected to the turning flange 6 at its end, and a second reducer is mounted vertically on the surface. An infant body simulation model 7 is mounted at the end of the second reducer. The upper arm 3, lower arm 5, first reducer 4, and second reducer all adopt a hollow design to ensure the transmission of data in the intermediate circuits and the delivery of simulated urine.

[0085] The components are securely connected via bolts, facilitating disassembly and maintenance. The touchscreen display serves as the human-machine interface, integrating control functions for each subsystem. The hollow design of the upper arm 3, lower arm 5, and reducers is crucial for ensuring the smooth flow of wiring and tubing, allowing all wires and IV lines to be concealed within the structure—not only aesthetically pleasing but also preventing interference during movement. The first reducer 4 drives the lower arm 5 to achieve axial rotation, simulating the lateral swaying of an infant's body. The second reducer drives the infant model to achieve lateral rotation, simulating rolling over. This combination of dual rotational degrees of freedom covers the main postural changes in an infant's daily activities, making the testing more closely resemble real-world usage scenarios.

[0086] like Figure 4As shown, the simulated urine delivery pipe at the bottom, as well as the control and data transmission line 31, enters the hollow structure of the first reducer 4 through the large arm 3. The front end of the small arm 5 is fixedly connected to the first large gear 32 by bolts. The first reducer 4 and the small arm 5 are connected by bearings to ensure the rotation of the small arm 5. The first servo motor 33 is mounted on the first reducer 4, and its end is equipped with a first small gear 34, which meshes with the first large gear 32 at the front end of the small arm 5 to form a reduction device.

[0087] The simulated urine tubing and wiring extend from the base 2, passing sequentially through the hollow structures of the upper arm 3 and the first reducer 4, before reaching the interior of the lower arm 5. This layout ensures that the tubing and wiring remain unexposed and are not compressed by the mechanical structure throughout the entire movement. The bearing connection between the first reducer 4 and the lower arm 5 reduces rotational friction, allowing the lower arm 5 to rotate flexibly. The first servo motor 33 transmits its rotational motion to the lower arm 5 through the meshing of the first pinion 34 and the first gear 32, simultaneously reducing speed and increasing torque, enabling the lower arm 5 to adjust its posture at appropriate speeds and torques. This transmission method is simple in structure, highly precise, and meets the position control requirements of dynamic simulation.

[0088] The base 2 is made of stainless steel and serves as a support, ensuring the stable operation of all parts of the equipment. The top of the base 2 has a recessed water tank to collect any liquid exposed during testing. Inside the base 2 are a water tank 12, a heater 13, a water pump 11, and a control system for simulating tests involving infant urine. All components are connected to the inner wall of the base 2. The heating element heats the water tank 12 to simulate the temperature of infant bodily fluids. The liquid in the water tank 12 is pumped by the water pump 11 through the upper arm 3 and lower arm 5 to the infant model.

[0089] The base 2 not only serves as the supporting foundation for the entire device but also integrates the core components of the liquid simulation unit and temperature control unit. The use of stainless steel ensures the strength and corrosion resistance of the base 2. The internal water tank 12 stores simulated urine, which is heated by the heater 13 to near human body temperature (e.g., 37°C) for more realistic testing conditions. The water pump 11, acting as a power source, delivers the heated liquid to the infant model through internal tubing. The control system (partially the control unit) is also housed within the base 2 for centralized management. A recessed water tank at the top of the base 2 collects any leaked liquid during testing, maintaining a clean environment. This integrated design makes the device compact and fully functional, capable of independently performing liquid simulation and temperature control functions without the need for external equipment.

[0090] like Figure 5As shown, the forearm 5 and the turning flange 6 are fixedly connected by bolts. The interior of the turning flange 6 is a hollow reduction gear. The sleeve is fixedly connected to the second large gear 53 and is mounted on the turning flange 6 through bearings at both ends. The second servo motor 51 is equipped with a second small gear 52 at its end, which meshes with the first large gear 32.

[0091] The upper arm 3 is made of stainless steel and is connected to the base 2. It provides support for the baby model test at the end. The interior is hollow and houses the water supply pipe and data transmission line from the bottom. The top side is equipped with the first servo motor 33 and the first reducer 4, which provide rotational movement for the lower arm 5 to simulate various postures of the baby, such as sitting, lying down, and prone, so as to obtain a more realistic baby usage scenario.

[0092] The forearm 5 is installed at the end of the first reducer 4 of the upper arm 3. It has a hollow internal structure to facilitate the arrangement of pipes and wires. The end of the forearm 5 is equipped with a transition flange perpendicular to the axis of the forearm 5. The flange connects to the second reducer and the second servo motor 51, providing rotational motion for the baby model at the end, which can simulate the baby's side-lying and rolling movements.

[0093] Based on the above embodiments, in an optional embodiment of the present invention, such as Figure 1 , 2 As shown in Figure 6, the infant body posture simulation model 7 has a first liquid outlet at its front. The infant body posture simulation model 7 also has a second liquid outlet on its lower back. Both the first and second liquid outlets are connected to the infusion tubing. The gas simulation unit includes an air pump 73 and an air path. The air path is located within the infant body posture simulation model 7, and the air outlet of the air pump 73 is connected to the air path. The air outlet of the air path is located on the surface and / or inside the testing area of ​​the infant body posture simulation model 7.

[0094] This embodiment features a detailed design for the liquid and gas outlets of the infant body posture simulation model 7. The first liquid outlet at the front simulates the infant's urethra, used to discharge simulated urine forward (to the front of the diaper). The second liquid outlet at the bottom of the back simulates the possibility of urine flowing backward when the infant is lying down, used to evaluate the diaper's rear leak-proof performance. Both outlets are connected to an infusion line, allowing for individual or simultaneous discharge as needed. The gas simulation unit's air pump 73 generates airflow, which is delivered through an internal air path to the test area on the model's surface or inside, used to evaluate the diaper's breathability. By setting multiple liquid and gas outlets on the model, the actual flow direction of infant excrement and the surface microenvironment can be more comprehensively simulated, making the test results for breathability and absorbency closer to reality.

[0095] Preferably, the infant body posture simulation model 7 includes a torso, which is rotatably mounted on the thigh of the torso. The infant body posture simulation model 7 includes a stepper motor 71 and a linkage 72 mechanism. The stepper motor 71 is fixed inside the infant body posture simulation model 7. The linkage 72 mechanism is drively connected to the stepper motor 71 and the thigh, enabling the stepper motor 71 to drive the thigh to rotate.

[0096] To further enhance the dynamic simulation capabilities of the infant model, a rotatable joint was incorporated at the base of the thigh. Internal stepper motor 71 and linkage 72 mechanisms drive thigh movement, simulating kicking, flexion, and extension movements of the infant's legs. These movements generate periodic compression and friction on the leak-proof sides of the diaper's legs, which are crucial factors in evaluating the diaper's dynamic leak-proof performance and wearing comfort. The stepper motor 71 precisely controls the frequency and amplitude of thigh movements, while the linkage 72 mechanism converts rotational motion into thigh swaying, resulting in a compact and responsive design. This active leg movement simulation allows the test to realistically reflect the interaction between the diaper and the skin during infant activity, thus more accurately assessing the product's fit and leak-proof effect.

[0097] The infant body simulation model 7 is mounted on the adapter flange at the end of the forearm 5. The model has a water outlet at the front, connected to the water pump 11 at the bottom via a water pipe, simulating the infant's urethra. A water outlet is located at the lower back, connected to both the internal and bottom water pumps 11. It employs an adjustable bionic human body model, supporting sitting, lying, prone, and dynamic posture switching. The internal drive components are driven by a third servo motor to simulate dynamic movements such as leg movements and abdominal undulations. Based on an infant activity feature database, force-time curves for leg kicks, rolling over, and other movements are generated.

[0098] like Figure 6 As shown, a stepper motor 71 is installed inside the infant body posture simulation model 7. The stepper motor 71 is connected to the thigh of the infant body posture simulation model 7 via a connecting rod 72. The motor drives a dynamic force application module to simulate leg kicking. Simultaneously, an air pump 73 is installed inside the infant body posture simulation model 7, and a gas control system controls the gas output to test various indicators such as the diaper's breathability. Pressure sensors 74, temperature sensors 75, humidity sensors 76, and air pressure sensors 77 are installed on both the inner and outer walls of the model to facilitate real-time collection of various data indicators of the infant and to evaluate the comfort of the diaper.

[0099] A stepper motor 71 drives the thigh via a linkage 72 to simulate leg kicking. An air pump 73 provides controllable airflow for breathability testing. Multiple sensors are distributed on the inner and outer walls of the model to monitor the pressure, temperature, humidity, and local air pressure changes at the contact surface between the diaper and the model in real time. Data from these sensors is collected synchronously, allowing for comprehensive analysis of the diaper's performance under different dynamic conditions. For example, pressure distribution can assess fit and comfort, temperature and humidity changes can reflect breathability and stuffiness, and air pressure changes can detect breathability. This multi-parameter synchronous monitoring method makes the evaluation of diaper performance more comprehensive and objective.

[0100] Based on the above embodiments, in an optional embodiment of the present invention, such as Figures 1 to 3 As shown, a mounting cavity is formed inside the base 2. The liquid simulation unit and the temperature control unit are located in the mounting cavity. The liquid simulation unit includes a water tank 12 and a water pump 11, both of which are located inside the base 2. The inlet of the water pump 11 is connected to the water tank 12, and the outlet of the water pump 11 is connected to the infusion pipeline. The temperature control unit includes a heater 13, which is located inside the base 2 and connected to the water tank 12.

[0101] like Figure 3 As shown, the base 2 contains a water pump 11, a water tank 12, and a heater 13. The water tank 12 contains a test liquid that simulates infant urine, and the liquid temperature is controlled by a heating element. The delivery of urine is controlled by the water pump 11, and the delivery pipe passes through the base 2 and enters the hollow structure of the upper arm 3.

[0102] The water tank 12, water pump 11, and heater 13 are all centrally installed within the mounting cavity of the base 2, making full use of the space in the base 2 and resulting in a compact overall structure. The water tank 12 stores the test liquid, which is heated to a set temperature (e.g., 37°C) by the heater 13. The water pump 11 then pumps the heated liquid into the infusion tubing, delivering it to the infant model. This integrated design simplifies external piping connections, reduces heat loss, and facilitates centralized control and maintenance. The heater 13 is directly connected to the water tank 12, enabling rapid and uniform heating of the liquid and ensuring stable simulated urine temperature, thereby avoiding the impact of temperature fluctuations on the performance testing of diaper materials.

[0103] Based on the above embodiments, in an optional embodiment of the present invention, such as Figure 1 , 2As shown in Figure 6, the sensing unit includes a pressure sensor 74, a temperature sensor 75, a humidity sensor 76, and a barometric pressure sensor 77. The pressure sensor 74 is arranged in an array on the surface of the infant body simulation model 7. The temperature sensor 75, humidity sensor 76, and barometric pressure sensor 77 are disposed on the surface and / or inner wall of the infant body simulation model 7. Preferably, the pressure sensor 74, temperature sensor 75, and barometric pressure sensor 77 are disposed on the model surface.

[0104] Pressure sensors 74 are arrayed on the model surface, acquiring pressure distribution maps of the diaper-model contact surface to identify pressure concentration areas (such as the waistline and groin) for evaluating comfort and the rationality of leak-proof design. Temperature, humidity, and air pressure sensors 77 monitor changes in the local microenvironment, such as the increase in temperature and humidity of the diaper's inner layer after absorption, and minute changes in air pressure during breathability testing. These sensors, located on the model's surface and inner wall, can perceive the diaper's performance from different levels. This multi-sensor fusion approach provides a rich data foundation for comprehensively evaluating the diaper's absorbency, backflow prevention, breathability, and comfort.

[0105] Based on the above embodiments, in an optional embodiment of the present invention, such as Figure 1 and 2 As shown, the multifunctional testing device simulating a real-world diaper usage scenario further includes: an operation screen 1 disposed on the base 2. The control unit is disposed on the operation screen 1 and / or the base 2. The control unit includes a control chip and a data processing module, with the control chip disposed within the operation screen 1 and / or the base 2. The control chip is electrically connected to the first servo motor 33, the second servo motor 51, the stepper motor 71, the water pump 11, the heater 13, and the air pump 73, respectively. The data processing module is signal-connected to the sensing unit and the operation screen 1. Preferably, the operation screen 1 is a touch display screen.

[0106] The operation screen 1 is mounted on the base 2. Inside, there is a control chip that controls the sensors of the entire device, water pump 11, air pump 73, heating device and other control parameters. It simulates the real situation of the baby and the realism of the environment. The results data collected by the sensors are processed and displayed on the screen, automatically generating various evaluation indicators and forming a test report, thereby improving the testing efficiency of the equipment.

[0107] The specific testing procedure is as follows: The diaper test sample is mounted on an infant model. The collected infant activity data is imported into the system to simulate the infant's daily activities. Simultaneously, the infant urine simulation system is activated to test the diaper's sealing and absorbency under dynamic conditions. The air pump 73 inside the infant model indicates the diaper's air permeability. Data collected by various sensors on the inner and outer walls of the infant model is processed by the controller's internal algorithm to output various performance evaluation indicators and automatically generate a test report.

[0108] First, the diaper is put on the bionic model and adjusted to the target posture (such as lying down) by a pneumatic mechanism.

[0109] Then, the temperature and humidity control module was activated to stabilize the surface temperature of the model at 37±0.5℃. Simulated urine was then injected into the front of the diaper using the liquid injection system (flow rate 10mL / s).

[0110] Finally, the dynamic force application module is activated to simulate a leg kick (frequency 1Hz, amplitude 30°). A 74-panel pressure sensor array records real-time pressure changes at the contact surface, and the data acquisition system generates a three-dimensional thermogram. The liquid saturation time and reverse osmosis rate are calculated, and it is analyzed whether the pressure peak region exceeds the comfort threshold.

[0111] Through the integrated control design of the control unit, the entire process of device attitude adjustment, liquid discharge, temperature control, gas output, and data acquisition is automated. Operators only need to set the test parameters, and the device can automatically complete the entire test process, which greatly reduces manual intervention, eliminates errors caused by human operation, and improves test efficiency and the consistency and repeatability of test results.

[0112] With a programmable control chip, it supports preset standardized test procedures and custom test procedures. It can flexibly adjust test parameters and action sequences for different age groups and different types of diapers, adapting to different test standards and R&D needs, greatly improving the versatility and applicability of the device.

[0113] Through real-time computation and visualization processing by the data processing module, the collected raw data can be transformed into quantifiable performance indicators and intuitive visualization charts, automatically generating standardized test reports. This eliminates the need for manual data organization and analysis, significantly reducing the workload of testers and improving the efficiency and accuracy of test data processing.

[0114] Through standardized test process design, the test conditions are fully controllable and reproducible. Different batches and different manufacturers of diaper products can be compared under completely consistent test conditions, providing a unified and reliable test standard for product performance rating and competitor analysis.

[0115] The interactive touchscreen design makes operation simple and intuitive, lowering the barrier to entry for the device. It can also display test progress and test data in real time, making it easy for operators to monitor the test process and handle abnormal situations in a timely manner.

[0116] The multifunctional testing device in this embodiment uses dynamic built-in control to realistically simulate the application scenarios of a baby's daily life by controlling the temperature of the test liquid. This avoids the testing loopholes of traditional testing equipment, eliminates possible design defects, and provides a more comprehensive and systematic test of the comfort and safety of diapers.

[0117] The baby body simulation model 7 is made of human-like silicone material. A large number of high-precision temperature sensors 75, pressure sensors 74, humidity sensors 76, and air pressure sensors 77 are installed inside and on the surface of the model. It can comprehensively detect various performance indicators of diapers in real use scenarios, and the test data is more reliable.

[0118] The control unit is programmable and automated for testing, supporting preset test procedures (such as "lying position - rolling over - sitting position" cycle). It is suitable for different sizes, types, and types of diapers, and can be flexibly adjusted to make the operation process closer to real-world usage scenarios, reduce manual intervention, and improve testing efficiency.

[0119] The multi-point pressure sensor array of the sensing unit can capture local stress concentration areas (such as waist circumference and leg anti-leakage edges) and simultaneously output multi-dimensional evaluation indicators such as liquid absorption performance, pressure comfort, and breathability under dynamic posture.

[0120] Obviously, the above detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to describe preferred embodiments, not all embodiments, and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Based on the embodiments of the invention, any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art to all other embodiments obtained without inventive effort are within the scope of protection of the invention.

Claims

1. A multifunctional testing device for simulating real-world diaper usage scenarios, characterized in that, Include: Base; The upper arm is attached to the base; The first rotating assembly is located on the main arm; The forearm is rotatably connected to the upper arm via the first rotating assembly; A bend flange, which engages with the forearm; The second rotating assembly is disposed on the bending flange; An infant posture simulation model is connected to the output end of the second rotating component; The liquid simulation unit is connected to the infant body posture simulation model via an infusion tubing; The temperature control unit is connected to the liquid simulation unit; A gas simulation unit, located within the infant body simulation model, is used to output gas capable of testing the air permeability of diapers. The sensing unit is disposed on the surface and / or inside the infant body posture simulation model; The control unit is electrically connected to the first rotating assembly, the second rotating assembly, the liquid simulation unit, the temperature control unit, the gas simulation unit, and the sensing unit, respectively. The upper arm and the lower arm are both hollow structures, and the data transmission line and the infusion pipeline pass through the upper arm, the first rotating component, the lower arm and the second rotating component.

2. The multifunctional testing device for simulating real-world diaper usage scenarios according to claim 1, characterized in that, The upper arm, the lower arm, and the base are all made of metal. Both the first rotating assembly and the second rotating assembly are provided with hollow channels; The infusion tubing starts from the base, passes sequentially through the upper arm, the first rotating component, the forearm, and the second rotating component, and then extends to the infant body simulation model.

3. The multifunctional testing device for simulating real-world diaper usage scenarios according to claim 1, characterized in that, The infant body posture simulation model has a first liquid outlet at the front and a second liquid outlet at the lower back. Both the first and second liquid outlets are connected to the infusion tubing. The gas simulation unit includes an air pump and an air path; the air path is disposed within the infant body posture simulation model, and the air outlet of the air pump is connected to the air path; the air outlet of the air path is located on the surface and / or internal test area of ​​the infant body posture simulation model.

4. The multifunctional testing device for simulating real-world diaper usage scenarios according to claim 1, characterized in that, The infant body posture simulation model includes a torso, which is rotatably mounted on the thighs of the torso; The infant body posture simulation model is equipped with a stepper motor and a linkage mechanism; the stepper motor is fixed inside the infant body posture simulation model; the linkage mechanism is connected to the stepper motor and the thigh, so that the stepper motor can drive the thigh to rotate.

5. The multifunctional testing device for simulating real-world diaper usage scenarios according to claim 1, characterized in that, The first rotating assembly includes a first reducer, a first large gear, a first small gear, and a first servo motor; The first reducer is located at the top of the boom; The first large gear is fixedly connected to one end of the forearm; The first reducer is rotatably connected to the forearm via a bearing. The first servo motor is mounted on the first reducer, and the first pinion is provided on the output shaft of the first servo motor. The first pinion meshes with the first gear.

6. The multifunctional testing device for simulating real-world diaper usage scenarios according to claim 1, characterized in that, The bend flange is fixedly connected to the forearm, and the mounting surface of the bend flange is perpendicular to the axis of the forearm. The second rotating assembly includes a sleeve, a second large gear, a second small gear, and a second servo motor; The sleeve is mounted on the bending flange via a bearing; The second large gear is fixedly connected to the sleeve; The second servo motor is mounted on the bending flange, and the output shaft of the second servo motor is provided with the second pinion, which meshes with the second large gear; The infant body posture simulation model is installed at the output end of the sleeve.

7. A multifunctional testing device for simulating real-world diaper usage scenarios according to any one of claims 1 to 6, characterized in that, The base has an internal mounting cavity; the liquid simulation unit and the temperature control unit are located in the mounting cavity. The liquid simulation unit includes a water tank and a water pump, both of which are housed within the base; the inlet of the water pump is connected to the water tank, and the outlet of the water pump is connected to the infusion pipeline. The temperature control unit includes a heater, which is disposed inside the base and connected to the water tank.

8. A multifunctional testing device for simulating real-world diaper usage scenarios according to any one of claims 1 to 6, characterized in that, The sensing unit includes a pressure sensor, a temperature sensor, a humidity sensor, and a barometric pressure sensor. The pressure sensors are distributed in an array on the surface of the infant body posture simulation model; The temperature sensor, humidity sensor, and air pressure sensor are disposed on the surface and / or inner wall of the infant body simulation model.

9. A multifunctional testing device for simulating real-world diaper usage scenarios according to any one of claims 1 to 6, characterized in that, Also includes: The operation screen is located on the base; The control unit is located on the operating screen and / or the base; The control unit includes a control chip and a data processing module, wherein the control chip is disposed in the operation screen and / or the base; The control chip is electrically connected to the first servo motor, the second servo motor, the stepper motor, the water pump, the heater, and the air pump, respectively. The data processing module is connected to the sensing unit and the operation screen.

10. A multifunctional testing device for simulating real-world diaper usage scenarios according to claim 9, characterized in that, The operating screen is a touch screen display; The base has a recessed water tank on top for collecting the test liquid that is exposed during the test.

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