阅读说明：本技术 基于力反馈原理的摩擦纳米发电机接触面积实时检测装置 (Real-time detection device for contact area of friction nano generator based on force feedback principle ) 是由 程广贵 曹杰 丁建宁 吴晔盛 张忠强 于 2019-08-26 设计创作，主要内容包括：本发明涉及光机电装备领域,特指一种基于力反馈原理的可实时检测摩擦纳米发电机接触面积的装置。通过单片机控制所测聚合物薄膜与ITO薄膜的接触分离,利用压力传感器获得所测聚合物薄膜所受的变化载荷信号并传到单片机,为系统提供位置反馈信号；根据摩擦生电和静电感应原理,将摩擦纳米发电机产生的电压信号传到计算机；利用光学测量原理通过CCD图像传感器获得所测聚合物薄膜与ITO薄膜的接触区域图像,并利用计算软件算出二者真实的接触面积。该装置可以实时检测摩擦纳米发电机工作时的真实接触面积,实现了实时检测聚合物薄膜电压输出性能与其接触面积的关系,为摩擦纳米发电机性能研究领域提供了极大的便利。(The invention relates to the field of optical-electromechanical equipment, in particular to a device capable of detecting the contact area of a friction nano generator in real time based on a force feedback principle. The contact separation of the polymer film to be measured and the ITO film is controlled by the singlechip, and a pressure sensor is utilized to obtain a variable load signal borne by the polymer film to be measured and transmit the variable load signal to the singlechip so as to provide a position feedback signal for a system; according to the principle of friction electricity generation and electrostatic induction, voltage signals generated by the friction nano generator are transmitted to a computer; and acquiring an image of a contact area between the measured polymer film and the ITO film by using an optical measurement principle through a CCD (charge coupled device) image sensor, and calculating the real contact area of the polymer film and the ITO film by using calculation software. The device can detect the real contact area of the friction nano generator during working in real time, realizes the relation between the voltage output performance of the polymer film and the contact area of the polymer film in real time, and provides great convenience for the research field of the performance of the friction nano generator.)

1. The friction nanometer generator contact area real-time detection device based on the force feedback principle is characterized by comprising a single chip microcomputer, a CCD image sensor, a fastener, a transmission device, an electric signal detection device, a shell, a pressure sensor, ITO conductive glass/thin film, a metal thin film and a polymer thin film; the base is fixed on the bottom surface of the shell, the single chip microcomputer is arranged on the upper surface of the shell, and the single chip microcomputer is connected with an external computer; the CCD image sensor is fixedly connected with the shell, fixed right above the shell and connected with the computer; the fastener is arranged on the upper surface of the shell and is positioned below the CCD image sensor; the ITO conductive glass/film is fixed on the shell by a fastener; the transmission device is arranged in the shell and is connected with the single chip microcomputer; the pressure sensor is arranged on the transmission device and is connected with an external computer; the polymer film is arranged on the pressure sensor and is tightly combined with the pressure sensor; the metal film is used as a substrate of the polymer film; the electric signal detection device is arranged inside the shell and is used for connecting the ITO film with the metal film through an electric wire.

2. The device for real-time detection of the contact area of the friction nanogenerator based on the force feedback principle as claimed in claim 1, wherein the shell body is of a hollow cuboid structure with four surfaces, namely an upper surface, a lower surface, a left surface and a right surface, and the bottom surface is of a flat plate structure, so that the device can be conveniently and horizontally placed as a whole.

3. The device for detecting the contact area of the friction nano generator in real time based on the force feedback principle as claimed in claim 1, wherein the CCD image sensor adopts a CCD image sensor with a light source, and two knobs are arranged on the device, the left knob 1 is used for integrally adjusting the position of the CCD image sensor, and the right knob 2 is used for adjusting the focal length of the CCD image sensor, so that the focal plane of the CCD image sensor coincides with the surface to be detected, and the effect of acquiring a clear image is achieved; the CCD image sensor is connected with an external computer, and transmits the acquired contact area image signal to the computer in real time.

4. The device for real-time detection of contact area of friction nano generator based on force feedback principle as claimed in claim 1, wherein the fastener is disposed on the housing, and cooperates with the chuck structure on the upper surface of the housing for fixing the ITO conductive glass/film on the surface of the housing; the tail end of the fastener is provided with the rubber pad, so that the ITO conductive glass/film is protected, and the experimental result is more accurate.

5. The device for real-time detection of contact area of friction nano-generator based on force feedback principle as claimed in claim 1, wherein the transmission device comprises a stepping motor, a coupler, a guide rod, a lead screw, a tray platform and a bracket, wherein the stepping motor is fixedly connected with the bracket, the coupler is connected with the stepping motor and the lead screw, the lead screw and the guide rod are connected with the tray platform, the tray platform is controlled to move up and down by rotation of the stepping motor, and the guide rod, the lead screw and the bracket are fixed on the base of the inner lower surface of the shell; and a stepping motor in the transmission device is connected with the single chip microcomputer, and the rotation number of turns of the stepping motor is accurately controlled by the single chip microcomputer so as to accurately control the moving distance of the tray platform.

6. The device for detecting the contact area of the friction nanogenerator based on the force feedback principle according to claim 1, wherein the electrical signal detection device comprises an electrometer and a wire, wherein two ends of the electrometer are respectively connected with the ITO thin film and the metal thin film; as the stepping motor of the transmission device drives the screw rod to enable the tray platform to reciprocate up and down, the polymer film and the ITO film are continuously contacted and separated to form the friction nano generator in a vertical contact separation mode, and the electrometer is used for detecting an electric signal generated by the friction nano generator.

7. The device for detecting the contact area of the friction nano-generator based on the force feedback principle in real time as claimed in claim 1, wherein the polymer film is made of a PTFE or PDMS material located at the end of the electronegativity sequence table, the thickness of the polymer film is 50 μm-1 mm, and the surface of the polymer film has a texture; the metal film is made of a Cu film or Ni film material with good conductivity, and the thickness of the metal film is 50 micrometers-1 mm; the thickness of the ITO film is smaller than 1/4 of the wavelength of a light source carried by the CCD image sensor, so that an antireflection effect is achieved.

8. The device for real-time detection of the contact area of the friction nanogenerator based on the force feedback principle as claimed in claim 5, wherein the tray platform is provided with rectangular blocks with regular shapes and different specifications, so that the experimental precision is improved, and in this case, the pressure sensor originally placed on the tray platform is transferred to the upper surface of the block used.

9. The device for real-time detection of the contact area of a friction nanogenerator based on the force feedback principle as claimed in claim 1, wherein the precise movement, i.e. the ascending and descending distance of the tray platform is realized by precisely controlling the number of turns of the stepping motor through a single chip microcomputer by utilizing the single chip microcomputer control technology; when the polymer film positioned on the tray platform is just contacted with the ITO conductive glass/film fixed above the device, the load borne by the polymer film and the contact area between the polymer film and the ITO film are zero; the tray platform continues to rise, and the load borne by the polymer film and the contact area between the polymer film and the ITO film are also continuously increased; the load change signal of the polymer film is obtained by a pressure sensor between the tray platform and the polymer film, the pressure sensor is connected with the single chip microcomputer, and the measured load information is used as a feedback signal of the position of the tray platform; the image change signal of the contact area of the polymer film and the ITO film is obtained in real time by a CCD image sensor with a light source, the CCD image sensor is connected with an external computer, the real contact area of the polymer film and the ITO film is calculated by calculation software on the computer, and a corresponding relation is established with the pressure detected by a pressure sensor; thereby realizing the reciprocating movement of the tray platform to ensure that the polymer film and the ITO film are continuously contacted and separated; according to the principle of frictional electrification and electrostatic induction, metal substrates of an ITO film and a polymer film are connected into a circuit to be manufactured into a frictional nano generator, a voltage output signal of the frictional nano generator can be obtained through an electric signal detection device, the electric signal detection device is connected with an external computer, and the voltage output signal of the polymer film is sent to the computer; and finally obtaining the relation between the output characteristic of the friction nano generator and the contact area.

Technical Field

The invention relates to the field of optical-electromechanical equipment, in particular to a device capable of detecting the contact area of a friction nano generator in real time based on a force feedback principle.

Background

Energy problems are one of the major problems affecting human progress and sustainable development, and various researches around development of new energy and recycling of renewable energy are actively conducted around the world; since a nano generator is proposed by a Wangzhining academy team in 2006 for the first time and is used for collecting mechanical energy, a mechanical energy collecting technology based on piezoelectric and triboelectric effects is widely concerned by the scientific community, particularly a triboelectric nano generator proposed in 2012 stimulates the research enthusiasm of a plurality of teams all over the world, and a plurality of subject groups research materials and relative performances of the triboelectric nano generator, and discover that the contact area of a polymer film forming the triboelectric nano generator determines the output performance of the triboelectric nano generator to a great extent; however, the relationship between the contact area and the output performance is quantitatively researched at present mainly by software simulation, and the relationship between the voltage output performance and the contact area of the polymer film cannot be detected in real time because the experimental research is rarely reported and no relevant test characterization equipment is found.

Disclosure of Invention

The device capable of detecting the contact area of the friction nano generator in situ provided by the invention can accurately detect the real contact area of the polymer texture surface during working by utilizing the reflection principle of light and combining with a single chip microcomputer control technology and an optical measurement technology, provides conditions for further researching the relation between the real contact area of the friction nano generator and the electrical output characteristic and the like, is widely applied in the field of research of the output performance of the friction nano generator, and has great use value.

The invention relates to a friction nanometer generator contact area real-time detection device based on a force feedback principle, which is explained by taking the research of the relation between the real contact area of a friction nanometer generator and the electrical output performance thereof as an example: the rotation turns of the stepping motor are accurately controlled by the singlechip through the singlechip control technology, so that the accurate movement of the tray platform, namely the ascending and descending distance is realized; when the polymer film positioned on the tray platform is just contacted with the ITO conductive glass/film fixed above the device, the load borne by the polymer film and the contact area between the polymer film and the ITO film are zero; the tray platform continues to rise, and the load borne by the polymer film and the contact area between the polymer film and the ITO film are also continuously increased; the load change signal of the polymer film is obtained by a pressure sensor between the tray platform and the polymer film, the pressure sensor is connected with the single chip microcomputer, and the measured load information is used as a feedback signal of the position of the tray platform; the image change signal of the contact area of the polymer film and the ITO film is obtained in real time by a CCD image sensor with a light source, the CCD image sensor is connected with an external computer, the real contact area of the polymer film and the ITO film is calculated by calculation software on the computer, and a corresponding relation is established with the pressure detected by a pressure sensor; therefore, the reciprocating movement of the tray platform is realized, so that the polymer film and the ITO film are continuously contacted and separated. According to the principle of frictional electrification and electrostatic induction, metal substrates of an ITO film and a polymer film are connected into a circuit to be manufactured into a frictional nano generator, a voltage output signal of the frictional nano generator can be obtained through an electric signal detection device, the electric signal detection device is connected with an external computer, and the voltage output signal of the polymer film is sent to the computer; and finally obtaining the relation between the output characteristic of the friction nano generator and the contact area.

The invention provides a friction nanometer generator contact area real-time detection device based on a force feedback principle, which is characterized by comprising a single chip microcomputer, a CCD image sensor, a fastener, a transmission device, an electric signal detection device, a shell, a pressure sensor, ITO conductive glass/thin film, a metal thin film and a polymer thin film. The device comprises a shell, a base, a singlechip, an external computer, a power supply and a power supply, wherein the shell main body is a hollow cuboid structure with four surfaces (upper, lower, left and right), the bottom surface is a flat plate structure, the device is conveniently; the CCD image sensor is fixedly connected with the shell, fixed right above the shell and connected with the computer; the fastener is arranged on the upper surface of the shell and is positioned below the CCD image sensor; the ITO conductive glass/film (the structure of the ITO conductive glass/film is that glass is on the top and the film is on the bottom) is fixed on the shell by a fastener; the transmission device is arranged in the shell and is connected with the single chip microcomputer; the pressure sensor is arranged on the transmission device and is connected with an external computer; the polymer film is arranged on the pressure sensor and is tightly combined with the pressure sensor; the metal film is used as a substrate of the polymer film; the electric signal detection device is arranged inside the shell and is used for connecting the ITO film with the metal film through an electric wire. See figure 1 for details.

The CCD image sensor adopts a CCD image sensor with a light source, two knobs are arranged on the device, the left knob 1 is used for integrally adjusting the position of the CCD image sensor, and the right knob 2 is used for adjusting the focal length of the CCD image sensor, so that the focal plane of the CCD image sensor is superposed with a surface to be measured, and the effect of acquiring a clear image is achieved; the CCD image sensor is connected with an external computer and transmits the acquired contact area image signal to the computer in real time;

the fastening piece is arranged on the shell, is matched with the chuck structure on the upper surface of the shell and is used for fixing the ITO conductive glass/film on the surface of the shell.

The transmission device comprises a stepping motor, a coupler, a guide rod, a lead screw, a tray platform and a support, wherein the stepping motor is fixedly connected with the support; see in particular fig. 3 of the drawings; and a stepping motor in the transmission device is connected with the single chip microcomputer, and the rotation number of turns of the stepping motor is accurately controlled by the single chip microcomputer so as to accurately control the moving distance of the tray platform.

The pressure sensor is arranged on the tray platform, a polymer film taking a metal film to be tested as a substrate is placed on the pressure sensor, the screw rod is driven by a stepping motor to enable the tray platform to move in a reciprocating mode (move up and down), and loads sensed by the pressure sensor are zero before and just when the polymer film is in contact with the ITO film; as the tray platform continues to rise, the real contact area between the polymer film and the ITO film is continuously increased, the load sensed by the pressure sensor is also continuously increased, the pressure sensor is connected with the single chip microcomputer, and the measured pressure signal is used as the position feedback signal of the tray platform;

the electric signal detection device comprises an electrometer and a lead, wherein two ends of the electrometer are respectively connected with the ITO thin film and the metal thin film; the stepping motor drives the lead screw to enable the tray platform to reciprocate up and down, the polymer film and the ITO film are continuously contacted and separated to form a friction nano generator in a vertical contact separation mode, and the electrometer is used for detecting an electric signal generated by the friction nano generator;

preferably, the polymer film is made of a material located at the tail end of the electronegativity sequence table, such as PTFE (polytetrafluoroethylene), PDMS (polydimethylsiloxane) material and the like, the thickness of the polymer film is 50 μm-1 mm, and the surface of the polymer film has textures such as micro-columns and the like;

preferably, the metal thin film is made of a material with good electrical conductivity, such as a Cu film, a Ni film, and the like, and the thickness of the metal thin film is 50 μm to 1 mm;

preferably, the thickness of the ITO film is smaller than 1/4 of the wavelength of a light source carried by the CCD image sensor, so that an anti-reflection effect is achieved;

preferably, the tray platform is provided with rectangular cushion blocks with regular shapes and different specifications, so that the experimental precision is improved, and in this case, the pressure sensor originally placed on the tray platform is transferred to the upper surface of the used cushion block;

preferably, the right side support plate of the shell is fixedly connected with the upper surface support plate of the shell, and a fastener is arranged for fixing the ITO glass/film;

preferably, the tail end of the fastener is provided with a rubber pad which plays a role in protecting ITO conductive glass/thin film, so that the experimental result is more accurate;

the real-time detection device for the contact area of the friction nano generator based on the force feedback principle can detect the real contact area of the friction nano generator during working in real time, solves the problem that the research on the relation between the voltage output performance of a current polymer film and the contact area of the current polymer film is too complex, improves the experimental efficiency and accuracy, and provides great convenience for the research on the performance of the friction nano generator.

Drawings

FIG. 1 is a schematic structural diagram of a friction nanogenerator capable of in-situ detection of the contact area according to the invention;

FIG. 2 is a partially enlarged view of the ITO glass/thin film fixing device on the upper surface of the housing according to the present invention;

fig. 3 is a partial enlarged view of the transmission device on the lower surface inside the housing of the present invention.

In the figure: 1. base 2, casing 3, support 4, tray platform 5, shaft coupling 6, step motor 7, singlechip 8, ITO film 9, glass 10, fastener 11, CCD image sensor 12, knob 113, knob 214, polymer film 15, metal film 16, pressure sensor 17, cushion 18, guide bar 19, lead screw

The specific implementation mode is as follows:

as shown in figure 1, a friction nanometer generator contact area real-time detection device based on force feedback principle comprises a base 1, a shell 2, a support 3, a tray platform 4, a coupler 5, a stepping motor 6, a single chip microcomputer 7, an ITO film 8, glass 9 (the two form ITO conductive glass/film), a fastener 10, a CCD image sensor 11, a knob 1-12, a knob 2-13, a polymer film 14, a metal film 15, a pressure sensor 16, a cushion block 17, a guide rod 18 and a lead screw 19, wherein the stepping motor 6 is precisely controlled by the single chip microcomputer 7 to rotate, the lead screw 19 is driven to rotate through the coupler 5 to drive the tray platform 4 to reciprocate up and down along the guide rod 18, the polymer film 14 on the tray platform 4 is in contact with the ITO film 8 fixed on the upper surface of the shell 2 through the fastener 10, and the contact tightness degree is changed, the real contact area of the two and the generated relative load also change, and a load signal with change is obtained in real time by the pressure sensor 16 and is transmitted to the computer in real time; meanwhile, a CCD image sensor 11 with a light source obtains a contact area image of the polymer film 14 and the ITO film 8 in real time by using an optical measurement principle and transmits the contact area image to a computer, and real contact area is calculated by using calculation software according to the obtained contact area image, so that the real contact area of the polymer film 14 and the ITO film 8 and the change rule of the load borne by the polymer film can be obtained; on the other hand, the tray platform 4 moves up and down in a reciprocating manner, so that the polymer film 14 and the ITO film 8 are continuously contacted and separated, the polymer film and the ITO film are connected into a circuit to be manufactured into a friction nano generator according to the friction electrification and electrostatic induction principles, the ITO film 8 and the metal film 15 are connected with an electrometer, the electrometer in the electric signal detection device is connected with a computer, and a voltage signal obtained by the electrometer is transmitted to the computer. Thus, the computer respectively obtains the electric signal generated by the friction nano generator and the real contact area of the polymer film, and the relation between the voltage output characteristic and the contact area of the polymer film can be obtained.

In summary, the friction nano-generator contact area real-time detection device based on the force feedback principle provided by the invention controls the contact separation of the measured polymer film and the ITO film through the single chip microcomputer, obtains the change load signal borne by the measured polymer film by using the pressure sensor and transmits the change load signal to the single chip microcomputer, and provides a position feedback signal for a system; according to the principle of friction electricity generation and electrostatic induction, voltage signals generated by the friction nano generator are transmitted to a computer; and acquiring an image of a contact area between the measured polymer film and the ITO film by using an optical measurement principle through a CCD (charge coupled device) image sensor, and calculating the real contact area of the polymer film and the ITO film by using calculation software. The device can detect the real contact area of the friction nano generator during working in real time, realizes the relation between the voltage output performance of the polymer film and the contact area of the polymer film in real time, and provides great convenience for the research field of the performance of the friction nano generator.

The friction nanometer generator contact area real-time detection device based on the force feedback principle can be used for researching the relation between the real contact area of the polymer film in the friction nanometer generator and the electrical output characteristic, can also be used for researching the relation between the real contact area and the load when the polymer film in the friction nanometer generator is in contact with materials with different surface roughness, improves the experimental precision and efficiency in the field of research on the output performance of the friction nanometer generator, and brings great convenience for a plurality of researches related to the polymer film.