Mechanical-electrical property testing equipment for elastic electronic materials

Abstract

This invention discloses a force-electric characteristic testing device for elastic electronic materials. The device includes: a humanoid motion unit comprising a lower leg support, a thigh support, and a humanoid knee joint; the knee joint includes a drive mechanism and an output shaft; the drive mechanism is kinetically connected to the output shaft; the thigh support is fixedly connected to the drive mechanism; and the lower leg support is fixedly connected to the output shaft; an elastic bionic skin unit containing an elastic electronic material structure; and an electrical testing unit connected to the elastic electronic material structure and used to collect at least one of the electrical performance parameters of the structure, including at least one of resistance, capacitance, and inductance. The force-electric characteristic testing device provided by this invention can simulate the force-electric characteristics of elastic electronic materials under humanoid motion, body temperature, and sweating conditions, satisfying the requirements for detecting human motion and physiological parameters.

Description

Technical Field

[0001] This invention specifically relates to a mechanical-electrical property testing device for elastic electronic materials, belonging to the field of elastic electronic materials and devices technology. Background Technology

[0002] Studying the mechanical and electrical properties of elastic electronic materials under human-like motion conditions is crucial for revealing the correlation between fabrication techniques and material properties under wearable conditions, optimizing the design of elastic electronic materials and devices, and promoting the application of new elastic electronic materials and devices from innovative research. Currently, the mechanical-electrical properties of elastic electronic materials can be characterized using a universal tensile testing machine combined with electrical testing instruments. However, the tensile deformation mode differs from human joint movement, lacking the ability to mimic the complex strain experienced during human motion. Furthermore, measuring the mechanical-electrical properties of elastic electronic materials using the human body itself cannot guarantee testing accuracy, consistency, and fatigue testing exceeding one million cycles, thus limiting the accurate evaluation of elastic electronic materials and devices and the study of the material-device-performance correlation laws and mechanisms under complex, cyclic strain. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a testing equipment for the mechanical-electrical properties of elastic electronic materials.

[0004] To achieve the aforementioned objectives, the technical solution adopted by this invention includes:

[0005] This invention provides a testing equipment for the mechanical-electrical properties of elastic electronic materials, comprising:

[0006] A humanoid motion unit includes a lower leg support, a thigh support, and a humanoid knee joint. The humanoid knee joint includes a drive mechanism and an output shaft. The drive mechanism is connected to the output shaft. The thigh support is fixedly connected to the drive mechanism, and the lower leg support is fixedly connected to the output shaft. The thigh support and the lower leg support can rotate about the output shaft under the drive of the drive mechanism.

[0007] An elastic bionic skin unit includes an elastic electronic material structure, which is fixedly connected to the lower leg support and the thigh support and at least covers a part of the humanoid knee joint. The elastic electronic material structure can undergo elastic stretching and contraction during the movement of the humanoid knee joint.

[0008] An electrical testing unit is connected to the elastic electronic material structure and is used to collect at least one of the electrical performance parameters of the elastic electronic material structure, wherein the electrical performance parameters include at least one of resistance, capacitance, and inductance.

[0009] Compared with the prior art, the advantages of the present invention include:

[0010] 1) The mechanical-electrical property testing equipment for elastic electronic materials provided in this embodiment of the invention can simulate the mechanical-electrical properties of elastic electronic materials under human motion, human body temperature and sweating environment, and meet the requirements for human motion and physiological parameter detection.

[0011] 2) The force-electric property testing equipment for elastic electronic materials provided in this embodiment of the invention can realize high-precision, high-repeatability simulation of more than one million cycles of human knee joint movement;

[0012] 3) The mechanical-electrical property testing equipment for elastic electronic materials provided in this embodiment of the invention integrates a liquid metal elastic heater with a sweat elastic microfluidic system to construct an elastic biomimetic skin system for covering human knee joints, which simulates human body temperature and sweating environment. This is crucial for revealing the correlation between preparation technology and material properties under human wear conditions and optimizing the design of elastic electronic materials and devices. It is also of great value for promoting the process of new elastic electronic materials and devices from innovative research to application. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a test equipment for the mechanical-electrical properties of elastic electronic materials and devices according to the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of a test equipment for the mechanical-electrical properties of elastic electronic materials and devices according to the present invention;

[0015] Figure 3 This is a schematic diagram of the humanoid knee joint in a force-electric property testing equipment for elastic electronic materials and devices according to the present invention;

[0016] Figure 4 This is a schematic diagram of the electronic skin in a force-electric property testing device for elastic electronic materials and devices according to the present invention;

[0017] Figure 5 This is a schematic diagram of the internal structure of the elastic electronic material in a force-electric property testing equipment for elastic electronic materials and devices according to the present invention. Detailed Implementation

[0018] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The following will further explain and illustrate this technical solution, its implementation process, and its principles.

[0019] The present invention provides a force-electric property testing equipment for elastic electronic materials, which can simulate the force-electric properties of elastic electronic materials under human-like motion, human body temperature, and sweating environment, and realize the simulation of human knee joint with high precision, high repeatability, and more than one million cycles of motion; by integrating liquid metal elastic heater with sweat elastic microfluidic system, an elastic bionic skin system for joint covering that simulates human body temperature and sweating environment is constructed.

[0020] This invention provides a testing equipment for the mechanical-electrical properties of elastic electronic materials, comprising:

[0021] A humanoid motion unit includes a lower leg support, a thigh support, and a humanoid knee joint. The humanoid knee joint includes a drive mechanism and an output shaft. The drive mechanism is connected to the output shaft. The thigh support is fixedly connected to the drive mechanism, and the lower leg support is fixedly connected to the output shaft. The lower leg support can rotate relative to the thigh support about the output shaft under the drive of the drive mechanism.

[0022] An elastic bionic skin unit includes an elastic electronic material structure, which is fixedly connected to the lower leg support and the thigh support and at least covers a part of the humanoid knee joint. The elastic electronic material structure can undergo elastic stretching and contraction during the movement of the humanoid knee joint.

[0023] An electrical testing unit is connected to the elastic electronic material structure and is used to collect at least one of the electrical performance parameters of the elastic electronic material structure, wherein the electrical performance parameters include at least one of resistance, capacitance, and inductance.

[0024] In one specific embodiment, the drive mechanism includes a frameless torque motor, the stator of which is fixedly connected to the thigh support, and the rotor of which is coaxially arranged and fixedly connected to the output shaft.

[0025] In one specific embodiment, the drive mechanism further includes a housing, in which the frameless torque motor and the output shaft are encapsulated. The housing is fixedly connected to the thigh support, the stator of the frameless torque motor is fixedly connected to the housing, and the output shaft is rotatably engaged with the housing via bearings.

[0026] In one specific embodiment, the drive mechanism further includes a harmonic reducer, and the rotor of the frameless torque motor is connected to the output shaft via the harmonic reducer.

[0027] In one specific embodiment, the harmonic reducer is disposed inside the housing, wherein the steel wheel of the harmonic reducer is fixedly disposed on the housing, the flexible wheel of the harmonic reducer is fixedly connected to the output shaft, the steel wheel and the flexible wheel of the harmonic reducer are meshed through a wave generator, and the wave generator is also fixedly connected to the power output end of the rotor of the frameless torque motor and can rotate with the rotor.

[0028] In one specific embodiment, the drive mechanism further includes a torque sensor connected to the flexible wheel and used at least to monitor the external load borne by the flexible wheel.

[0029] In one specific embodiment, the drive mechanism further includes a Hall sensor connected to the rotor and used at least to monitor the position and rotational speed of the rotor.

[0030] In one specific embodiment, the drive mechanism further includes an encoder connected to the output shaft and used at least to monitor the rotational speed and angular position of the output shaft.

[0031] In one specific embodiment, the elastic electronic material structure has multiple microchannel structures inside that allow for fluid flow.

[0032] Furthermore, the elastic bionic skin unit also includes an artificial sweat system, a heating system, an elastic heating layer, a temperature sensor, and a humidity sensor. The artificial sweat system is connected to the microfluidic structure and is at least used to provide fluid to the microfluidic structure and drive the fluid to flow within the microfluidic structure.

[0033] The elastic heating layer is stacked and thermally connected to the elastic electronic material structure, and the heating system is thermally connected to the elastic heating layer;

[0034] The temperature sensor and humidity sensor are respectively connected to the elastic electronic material structure and are used to monitor the temperature and humidity parameters of the elastic electronic material structure.

[0035] In one specific embodiment, the elastic heating layer includes a liquid metal elastic heater.

[0036] The following will further explain the technical solution, its implementation process and principle in conjunction with the accompanying drawings and specific implementation examples. It should be noted that the embodiments of the present invention are intended to explain and illustrate the structural composition of a force-electric characteristic testing equipment for elastic electronic materials. Unless otherwise specified, the calf support, thigh support, frameless torque motor, bearing, harmonic reducer, encoder, torque sensor, Hall sensor, temperature sensor, humidity sensor, liquid metal elastic heater, heating system, artificial sweat system, electrical testing instruments and other components used in the embodiments of the present invention are all known to those skilled in the art and can all be obtained commercially. The specific models of these components are not limited here.

[0037] Example 1

[0038] The structure of a force-electric property testing device for elastic electronic materials is as follows: Figure 1 As shown, Figure 1 The electrical testing unit has been omitted.

[0039] In this embodiment, a force-electrical property testing device for elastic electronic materials mainly includes three parts: a humanoid motion unit, an elastic bionic skin unit, and an electrical testing unit. The humanoid motion unit is mainly used to simulate human leg movements. The elastic bionic skin unit contains an elastic electronic material structure. The elastic bionic skin unit is driven and cooperates with the humanoid motion unit and can simulate human body temperature and sweating environment. The electrical testing unit is connected to the elastic electronic material structure and is used to collect at least one of the electrical performance parameters of the elastic electronic material structure. The electrical performance parameters include at least one of resistance, capacitance, and inductance.

[0040] In this embodiment, the structure of the humanoid motion unit is as follows: Figure 2 As shown, the humanoid motion unit includes a lower leg support, a thigh support, and a humanoid knee joint. The humanoid knee joint includes a drive mechanism and an output shaft. The drive mechanism is connected to the output shaft. The thigh support is fixedly connected to the drive mechanism, and the lower leg support is fixedly connected to the output shaft. The lower leg support can rotate relative to the thigh support about the output shaft under the drive of the drive mechanism.

[0041] In this embodiment, please refer to Figure 3 The drive mechanism includes a frameless torque motor, the rotor of which is coaxially arranged and fixedly connected to the output shaft.

[0042] In this embodiment, the drive mechanism further includes a housing, the frameless torque motor and the output shaft are encapsulated in the housing, the housing is fixedly connected to the thigh support, the stator of the frameless torque motor is fixedly connected to the housing, and the output shaft is rotatably engaged with the housing through a bearing, that is, the stator is fixedly engaged with the housing, and the rotor is rotatably engaged with the housing and can rotate within the housing.

[0043] It should be noted that the frameless torque motor can be fixed to the housing by means of screws or other connectors or by welding. The fixed connection structure and method between the housing and the thigh support, the lower leg support and the output shaft can also be achieved by means known to those skilled in the art, and no specific limitation is made here.

[0044] In this embodiment, the drive mechanism further includes a harmonic reducer, which is disposed inside the housing. The steel wheel of the harmonic reducer is fixedly disposed on the housing, and the flexible wheel of the harmonic reducer is fixedly connected to the output shaft. The steel wheel and the flexible wheel of the harmonic reducer mesh through a wave generator. The wave generator is also fixedly connected to the power output end of the rotor of the frameless torque motor and can rotate with the rotor.

[0045] In this embodiment, the drive mechanism further includes a torque sensor disposed inside the housing, the torque sensor being connected to the flexible wheel, and at least used to monitor the external load borne by the flexible wheel.

[0046] In this embodiment, the drive mechanism further includes a Hall sensor, which is disposed inside the housing and connected to the rotor. The Hall sensor is used to monitor at least the position and speed of the rotor. Specifically, the power output end of the rotor is fixedly connected to the wave generator by screws, and the other end is provided with the Hall sensor. The Hall sensor is used to detect the position and speed signals of the rotor.

[0047] In this embodiment, the drive mechanism further includes an encoder, which is disposed inside the housing and connected to the output shaft, and is used at least to monitor the rotational speed and angular position of the output shaft.

[0048] In this embodiment, please refer to Figure 4 and Figure 5 The elastic bionic skin unit includes an elastic electronic material structure, which is fixedly connected to the lower leg support and the thigh support and covers at least a part of the humanoid knee joint. The elastic electronic material structure can elastically stretch and contract during the movement of the humanoid knee joint.

[0049] In this embodiment, the elastic electronic material structure has multiple microchannel structures for fluid flow, and the elastic bionic skin unit further includes an artificial sweat system, a heating system, an elastic heating layer, a temperature sensor, and a humidity sensor. The artificial sweat system is connected to the microchannel structures and is at least used to provide fluid to the microchannel structures and drive the fluid to flow within the microchannel structures. The elastic heating layer is stacked with the elastic electronic material structure and is thermally connected. The heating system is thermally connected to the elastic heating layer. The temperature sensor and humidity sensor are respectively connected to the elastic electronic material structure and are at least used to monitor the temperature and humidity parameters of the elastic electronic material structure.

[0050] In this embodiment, the artificial sweat system, heating system, elastic heating layer, temperature sensor, and humidity sensor can be integrated within the elastic electronic material structure. In this embodiment, the elastic heating layer includes a liquid metal elastic heater.

[0051] This invention provides a force-electric property testing device for elastic electronic materials. It uses a humanoid knee joint as the driving source to drive the movement of simulated human skin. The humanoid knee joint houses a frameless torque motor, the stator of which is fixed inside the casing. The rotor of the frameless torque motor is connected to the wave generator of a harmonic reducer, which drives the output shafts on both sides to rotate. Each output shaft integrates an encoder and a torque sensor and is fixedly connected to a lower leg support. The casing of the humanoid knee joint is fixedly connected to a thigh support, which can rotate relative to the lower leg support. The elastic electronic material is attached to the humanoid knee joint. Through a pump, internal flow channels, and a heating system, the device can simulate human body temperature and sweating conditions. Combined with the movement of the humanoid knee joint, the force-electric properties of the elastic electronic material under human-like movement conditions can be tested.

[0052] This invention provides a force-electric property testing device for elastic electronic materials, which can simulate the force-electric properties of elastic electronic materials under human-like movement, body temperature, and sweating environments, satisfying the requirements for detecting human movement and physiological parameters. Furthermore, this invention provides a force-electric property testing device for elastic electronic materials that can achieve high-precision, high-repeatability simulation of over a million cycles of human knee joint movement. Moreover, by integrating a liquid metal elastic heater with a sweat elastic microfluidic system, an elastic bionic skin system simulating human body temperature and sweating environments is constructed for covering human-like knee joints. This is crucial for revealing the correlation between fabrication technology and material properties under human wear conditions, optimizing the design of elastic electronic materials and devices, and is of great value in promoting the process of innovative research and application of new elastic electronic materials and devices.

[0053] It should be understood that the above embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A testing device for the mechanical-electrical properties of elastic electronic materials, characterized in that... include: A humanoid motion unit includes a lower leg support, a thigh support, and a humanoid knee joint. The humanoid knee joint includes a drive mechanism and an output shaft. The drive mechanism is connected to the output shaft. The thigh support is fixedly connected to the drive mechanism, and the lower leg support is fixedly connected to the output shaft. The lower leg support can rotate relative to the thigh support about the output shaft under the drive of the drive mechanism. An elastic bionic skin unit includes an elastic electronic material structure, which is fixedly connected to the lower leg support and the thigh support and at least covers a part of the humanoid knee joint. The elastic electronic material structure can undergo elastic stretching and contraction during the movement of the humanoid knee joint. An electrical testing unit is connected to the elastic electronic material structure and is used to collect at least one of the electrical performance parameters of the elastic electronic material structure, wherein the electrical performance parameters include at least one of resistance, capacitance, and inductance. The elastic electronic material structure has multiple microchannel structures for fluid flow. The elastic bionic skin unit further includes an artificial sweat system, a heating system, an elastic heating layer, a temperature sensor, and a humidity sensor. The artificial sweat system is connected to the microchannel structures and is used at least to provide fluid to and drive the fluid to flow within the microchannel structures. The elastic heating layer is stacked with and thermally connected to the elastic electronic material structure. The heating system is thermally connected to the elastic heating layer. The temperature sensor and humidity sensor are respectively connected to the elastic electronic material structure and are used at least to monitor the temperature and humidity parameters of the elastic electronic material structure.

2. The force-electric characteristic testing equipment according to claim 1, characterized in that: The drive mechanism includes a frameless torque motor, the stator of which is fixedly connected to the thigh support, and the rotor of which is coaxially arranged with the output shaft.

3. The force-electric characteristic testing equipment according to claim 2, characterized in that: The drive mechanism also includes a housing, in which the frameless torque motor and the output shaft are encapsulated. The housing is fixedly connected to the thigh support, the stator of the frameless torque motor is fixedly connected to the housing, and the output shaft is rotatably engaged with the housing via bearings.

4. The force-electric characteristic testing equipment according to claim 3, characterized in that: The drive mechanism also includes a harmonic reducer, and the rotor of the frameless torque motor is connected to the output shaft via the harmonic reducer.

5. The force-electric characteristic testing equipment according to claim 4, characterized in that: The harmonic reducer is disposed inside the housing, wherein the steel wheel of the harmonic reducer is fixedly disposed on the housing, the flexible wheel of the harmonic reducer is fixedly connected to the output shaft, the steel wheel and the flexible wheel of the harmonic reducer are meshed through a wave generator, and the wave generator is also fixedly connected to the power output end of the rotor of the frameless torque motor and can rotate with the rotor.

6. The force-electric characteristic testing equipment according to claim 5, characterized in that, The drive mechanism further includes a torque sensor, which is connected to the flexible wheel and is used at least to monitor the external load borne by the flexible wheel.

7. The force-electric characteristic testing equipment according to claim 5, characterized in that, The drive mechanism further includes a Hall sensor, which is connected to the rotor and is used to monitor at least the position and rotational speed of the rotor.

8. The force-electric characteristic testing equipment according to claim 5, characterized in that, The drive mechanism further includes an encoder, which is connected to the output shaft and is used at least to monitor the rotational speed and angular position of the output shaft.

9. The force-electric characteristic testing equipment according to claim 1, characterized in that: The elastic heating layer includes a liquid metal elastic heater.

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