Device and Method for Detecting Plate Suspension Based on Single-Electrode Triboelectric Nanogenerator

Abstract

This invention discloses a device and method for detecting glass breakage and suspension based on a single-electrode triboelectric nanogenerator, relating to the field of substrate glass production and quality inspection technology. The device includes a friction layer, an electrode layer, and a signal acquisition module. The friction layer is disposed on the surface of an anvil strip and has a contact surface that contacts the bottom surface of the substrate glass. The electrode layer is disposed on the back side of the friction layer, and an insulating layer is provided between the electrode layer and the friction layer. The signal acquisition module is electrically connected to the electrode layer. The detection method is as follows: during the breaking process, the substrate glass contacts and separates from the friction layer, generating triboelectric charges. The electrode layer outputs an induced electrical signal through electrostatic induction. The signal acquisition module acquires the signal amplitude and compares it with a preset threshold. If the amplitude is lower than the threshold, suspension is determined and an alarm is triggered. This invention utilizes the self-driven detection of the breaking action, requiring no external power supply. It has a simple structure and does not alter existing equipment. It can identify the suspension state in real time, effectively avoiding quality defects such as breakage, multiple pieces, and missing pieces, thus improving the breaking yield.

Description

Technical Field

[0001] This invention belongs to the field of substrate glass production and quality inspection technology, specifically relating to a device and method for detecting glass breakage and suspension based on a single-electrode triboelectric nanogenerator. Background Technology

[0002] In the manufacturing process of substrate glass, the cross-cutting and longitudinal cutting processes are crucial steps that determine the final dimensional accuracy and edge quality of the glass sheet. The basic process is as follows: First, a diamond cutting tool is used to etch a pre-defined cutting line on the surface of the glass sheet. Then, a bending device applies bending force along the cutting line, causing the glass sheet to break cleanly along the etched line. During this process, the glass sheet must be tightly fitted to the supporting surface of the silicone rubber anvil strip before bending. The silicone rubber anvil strip, acting as a flexible support medium, can evenly transmit the bending force to the bottom surface of the glass, ensuring that the crack extends strictly along the cutting line, thereby obtaining a clean cross-section and precise dimensions.

[0003] However, in actual production, glass sheets often exhibit partial or complete suspension during the breaking process. The causes of this suspension are complex and varied, including but not limited to: warping deformation of the glass sheet itself due to uneven stress release during annealing; uneven support surfaces caused by localized aging, permanent compression deformation, or surface wear of the silicone rubber anvil strip after long-term use; momentary detachment between the glass sheet and the anvil strip due to periodic vibrations during the operation of the cutting equipment; and minute displacement of the glass sheet caused by airflow disturbances or temperature and humidity changes in the workshop. These factors make the suspension state highly random and instantaneous, making it difficult to accurately judge through routine visual inspection or manual experience. When the glass sheet is suspended, the anvil strip cannot provide effective support in the suspended area, disrupting the force transmission path and causing the stress distribution within the glass sheet to deviate from the preset cutting line. This leads to a shift in the crack propagation direction, ultimately resulting in serious quality defects such as breakage (glass fractures outside the cutting line), multiple pieces (one piece of glass breaks into multiple irregular fragments), missing pieces (edge ​​parts are missing), chipped corners, and edge breakage. These defects not only directly reduce product yield, but also increase the load on subsequent grinding and polishing processes, and may even cause the entire piece of glass to be scrapped, resulting in significant economic losses for the manufacturing company.

[0004] To address the aforementioned issues, the industry currently lacks effective real-time detection methods. Existing technologies primarily rely on differences in sound emitted during the breaking process or observation of the cross-sectional shape after breaking to indirectly determine if there is any suspension. This method is not only lagging behind the production process but also highly dependent on personal experience, lacking quantitative standards and reliability. A few production lines have attempted to use laser displacement sensors or capacitive proximity sensors for non-contact detection of glass plate positions, but these solutions face numerous limitations in practical applications: optical sensors are susceptible to the reflective properties of the glass surface, environmental dust, and vibration interference, resulting in poor measurement stability; capacitive sensors are sensitive to changes in the medium between the glass and the probe (such as the material of the cutting board strip, temperature, and humidity), are difficult to calibrate, and their installation location is limited by the compact structure of the cross-section frame, making integration difficult without significant modifications to existing equipment. More importantly, all of these sensors require external power supply and complex signal processing circuits, increasing system cost and failure rate, thus limiting their large-scale application in industrial settings.

[0005] Triboelectric nanogenerators (TENGs), as an emerging self-powered sensing technology, have demonstrated unique advantages in flexible sensing, vibration monitoring, and contact state detection in recent years. TENGs utilize the triboelectric and electrostatic induction effects that occur during the contact-separation process of two different materials to convert mechanical energy into an electrical signal output. The output amplitude is highly correlated with parameters such as contact area, contact pressure, separation speed, and separation distance. This characteristic makes TENGs naturally suitable for detecting the degree of adhesion between two objects. However, applying TENG technology to the detection of glass substrates in mid-air faces several pressing technical challenges. First, the glass substrate is a hard and brittle material, and its surface condition (cleanliness, roughness) significantly affects the triboelectric output when in contact with the friction layer. Obtaining a stable detection signal under fluctuating glass surface characteristics is a major challenge. Second, the silicone rubber anvil strip itself is a high-resistivity dielectric material. If the triboelectric electrode structure is not properly designed, the static charge accumulated within the anvil strip will severely interfere with the electrode sensing signal, leading to signal distortion or an excessively low signal-to-noise ratio. Furthermore, the anvil strips are subjected to cyclic compression and shearing forces during the board-breaking process, requiring the embedded detection device to possess good flexibility and fatigue resistance, maintaining structural integrity and stable electrical performance under long-term dynamic loads. In addition, the limited space in the transverse cutting area necessitates that the detection device be integrated into the periphery of the anvil strip with a minimalist structure, without affecting the original trajectory and mechanical properties of the board-breaking action. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned problems and provide a device and method for detecting glass breakage and suspension based on a single-electrode triboelectric nanogenerator. This solves the technical problem in the prior art where the lack of real-time bonding state detection means makes it impossible to identify and warn of suspension state during the glass breakage process, resulting in quality defects such as breakage, multiple pieces, and missing pieces.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a plate-breaking suspension detection device based on a single-electrode triboelectric nanogenerator, comprising a triboelectric layer, an electrode layer and a signal acquisition module; The friction layer is disposed on the surface of the anvil strip, and the friction layer has a contact surface for contacting the bottom surface of the substrate glass; The electrode layer is disposed on the back side of the friction layer, and an insulating layer is disposed between the electrode layer and the friction layer; The signal acquisition module is electrically connected to the electrode layer.

[0008] A further improvement of the present invention is that the friction layer is a polymer film, and the polymer film is made of any one of polytetrafluoroethylene, polyvinylidene fluoride, polyimide or polydimethylsiloxane.

[0009] A further improvement of the present invention is that the contact surface of the friction layer is provided with a micro-nano structure texture, wherein the micro-nano structure texture is any one of nanowire array, nanopore structure, micro pyramid array or plasma-etched roughened surface.

[0010] A further improvement of the present invention is that the electrode layer is a flexible metal film, and the flexible metal film is made of any one of copper foil, aluminum foil, silver nanowire film, conductive carbon film or tin-plated copper strip.

[0011] A further improvement of the present invention is that the insulating layer is a high-temperature resistant adhesive layer or a double-sided insulating tape layer, and the electrode layer is fixed to the back side of the friction layer through the insulating layer.

[0012] A further improvement of the present invention is that the friction layer and the electrode layer are attached to the peripheral area of ​​the upper surface of the anvil strip, the upper surface of the friction layer is 0.1~2mm higher than the upper surface of the anvil strip, or the upper surface of the friction layer is flush with the upper surface of the anvil strip.

[0013] A further improvement of the present invention is that the friction layer and the electrode layer are embedded inside the anvil strip, the upper surface of the friction layer is exposed on the upper surface of the anvil strip, and the electrode layer is located below the friction layer.

[0014] A further improvement of the present invention is that the signal acquisition module includes a rectifier circuit, which is a full-bridge rectifier circuit, and the input terminal of the rectifier circuit is electrically connected to the electrode layer; the signal acquisition module also includes a filter circuit, the input terminal of which is electrically connected to the output terminal of the rectifier circuit; the signal acquisition module also includes an analog-to-digital converter circuit, the input terminal of which is electrically connected to the output terminal of the filter circuit.

[0015] Secondly, the present invention also provides a detection method using the above-mentioned plate-breaking suspension detection device, comprising the following steps: S1, the friction layer is disposed on the surface of the anvil strip, such that the contact surface of the friction layer faces the bottom surface of the substrate glass; S2, During the plate breaking process, the bottom surface of the substrate glass comes into contact with and separates from the contact surface of the friction layer, and the surface of the friction layer generates triboelectric charge; S3, the electrode layer outputs an induced electrical signal to the signal acquisition module through electrostatic induction; S4, the signal acquisition module acquires the induced electrical signal and obtains the amplitude of the induced electrical signal; S5, compare the amplitude of the induced electrical signal with a preset threshold, and determine that the substrate glass is in a suspended state when the amplitude is lower than the preset threshold.

[0016] A further improvement of the present invention is that the preset threshold includes a voltage threshold and / or a current threshold, and when the amplitude of the induced electrical signal is lower than the preset threshold, a floating alarm signal is output.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a device for detecting the suspension of a cutting board based on a single-electrode triboelectric nanogenerator. The device comprises a friction layer disposed on the surface of the cutting board strip with a contact surface that contacts the bottom surface of the substrate glass, an electrode layer disposed on the back of the friction layer with an insulating layer between them, and a signal acquisition module electrically connected to the electrode layer. These components together constitute a self-powered sensing structure based on a single-electrode triboelectric nanogenerator. Since this device directly utilizes the contact-separation motion that inevitably occurs between the substrate glass and the friction layer during the cutting action to generate triboelectric charge, and outputs an electrical signal through electrostatic induction, it achieves the detection function without external power supply, avoiding the occupation of the compact space of the cross-section by additional wiring or power modules. Furthermore, the friction layer and electrode layer are integrated onto the surface of the cutting board strip in an adhesive manner, resulting in an extremely simple overall structure without the need for an additional support layer. This allows for non-destructive installation without altering the existing cutting board strip size or the cutting trajectory, effectively maintaining the stability of the original process. The insulating layer ensures electrical isolation between the electrode layer and the cutting board strip, preventing interference from the silicone rubber dielectric material on the induced signal and ensuring the purity and reliability of the signal output. After the signal acquisition module is electrically connected to the electrode layer, it can acquire the electrical signal fluctuations caused by changes in the glass bonding or suspension state in real time, thereby realizing quantitative monitoring of the bonding state at the moment of glass breaking. Based on the above structure, the device can accurately identify the suspension state and provide timely warnings before or at the moment of glass breaking, effectively avoiding quality defects such as cracking, multiple pieces, missing pieces, and falling pieces caused by suspension, significantly improving the yield of substrate glass cutting and breaking processes. It has outstanding advantages such as simple structure, low cost, high reliability, and easy application in existing production lines.

[0018] Furthermore, the contact surface of the friction layer is provided with a micro-nano structure texture. This structure significantly increases the actual contact area between the friction layer and the substrate glass, thereby greatly increasing the amount of triboelectric charge generated during the contact-separation process. This enhances the amplitude and signal-to-noise ratio of the induced electrical signal, making it easier to identify and distinguish the minute signal fluctuations caused by the suspended state, and effectively improving the sensitivity and judgment accuracy of the detection device.

[0019] Furthermore, the friction layer and electrode layer are attached to the periphery of the upper surface of the anvil strip or embedded inside the anvil strip, and the upper surface of the friction layer is 0.1~2mm higher than or flush with the upper surface of the anvil strip. This structural design allows the detection device to be integrated into the existing anvil strip structure in a non-invasive manner, and installation can be completed without modifying the cross-cutting equipment. At the same time, the overall thickness of no more than 5mm ensures that the device does not affect the original gap between the anvil strip and the substrate glass and the bending action trajectory, maintaining the stability and consistency of the existing process parameters.

[0020] This invention also provides a method for detecting glass breakage and suspension. First, a friction layer is placed on the surface of an anvil strip with its contact surface facing the bottom surface of the substrate glass. Then, during the breaking process, the inevitable contact and separation motion between the bottom surface of the substrate glass and the contact surface of the friction layer generates frictional charge. Next, the electrostatic induction of the electrode layer converts the charge change on the surface of the friction layer into a collectable induced electrical signal, which is output to a signal acquisition module. Finally, the amplitude of the induced electrical signal is collected and compared with a preset threshold to determine the suspension state. This method uses the change in contact area and distance between the substrate glass and the friction layer as the detection basis, directly converting the glass adhesion state into an electrical signal amplitude using the principles of triboelectric charging and electrostatic induction. This achieves synchronization between the detection process and the breaking action, eliminating the need for an additional excitation source or detection light source. Since the amount of frictional charge generated decreases as the distance between the substrate glass and the friction layer increases, there is a clear negative correlation between the signal amplitude and the suspension distance. This provides a clear physical basis for the threshold determination method, and the determination logic is simple and reliable. Meanwhile, the signal acquisition module performs stabilization processing on the induced electrical signal, including rectification, filtering, and analog-to-digital conversion, before threshold comparison, effectively improving the anti-interference capability and accuracy of the detection. Based on this method, when the glass is partially or entirely suspended, the system can output an alarm signal before the breaking action is completed, allowing time for intervention by operators or automated control systems. This eliminates quality risks such as cracking, multiple pieces, and missing pieces caused by suspension at the source, and has significant advantages such as fast detection response, quantifiable judgment standards, no need for manual experience judgment, and applicability to various breaking scenarios including cross-cutting and longitudinal cutting. Attached Figure Description

[0021] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components of the invention.

[0022] Figure 1 This is the working circuit diagram of the present invention; Figure 2 This is a schematic diagram illustrating the working principle of the present invention; Figure 3 The diagram shows the board breaking state detection of the present invention: (a) board breaking waiting; (b) normal bonding; (c) one-sided edge curling; (d) double-sided edge flipping.

[0023] The components are: 1. substrate glass; 2. friction layer; 3. electrode layer; 4. anvil strip. Detailed Implementation

[0024] 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. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following 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 illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0030] The present invention will now be described in further detail with reference to the accompanying drawings: This invention provides a plate-breaking suspension detection device based on a single-electrode triboelectric nanogenerator, comprising a friction layer 2, an electrode layer 3, and a signal acquisition module. The friction layer 2 is disposed on the surface of a cutting board strip 4, and has a contact surface for contacting the bottom surface of a substrate glass 1. The electrode layer 3 is disposed on the back side of the friction layer 2, and an insulating layer is disposed between the electrode layer 3 and the friction layer 2. The signal acquisition module is electrically connected to the electrode layer 3. The entire device is fixed to the periphery of the cutting board strip using high-temperature resistant adhesive, mechanical clamping, or embedding methods, ensuring the stability of the cutting board strip and the friction layer material during the plate-breaking process.

[0031] During the transverse and longitudinal cutting of the substrate glass 1, the substrate glass 1 must be tightly adhered to the surface of the silicone rubber anvil strip 4 before being bent, so that a uniform bending force can be applied along the cutting line of the cutter. If the substrate glass 1 is partially or entirely suspended at the moment of bending, the anvil strip 4 cannot provide support for the bottom surface of the substrate glass 1, which will cause the stress concentration position to shift, causing the crack to deviate from the predetermined tangent line, resulting in quality defects such as breakage, multiple pieces, missing pieces, and edge damage. Suspension is usually caused by a variety of factors such as glass warping deformation, local aging deformation of the anvil strip 4, equipment vibration, and airflow disturbance. It occurs randomly and is difficult to identify in time by visual means. At present, the industry mainly relies on manual experience to judge whether the glass is adhered, which cannot quantitatively monitor the adhesion state at the moment of bending, nor can it provide early warning. This invention uses the principle of triboelectric charging and electrostatic induction to convert the relative motion between the substrate glass 1 and the anvil strip 4 during transverse or longitudinal cutting into an electrical signal, realizing a self-powered detection method without external power supply, which can identify the suspension state before or at the moment of bending and issue a warning signal.

[0032] The friction layer 2 is a polymer film, made of any one of polytetrafluoroethylene, polyvinylidene fluoride, polyimide, or polydimethylsiloxane. These materials have a higher triboeity than the substrate glass 1, facilitating the generation of triboelectric charge during the contact-separation process. The contact surface of the friction layer 2 is textured with micro / nano structures, such as nanowire arrays, nanopore structures, micro-pyramid arrays, or plasma-etched roughened surfaces, to increase the contact area and thus improve the amount of triboelectric charge generated and the sensitivity of suspension detection. When the substrate glass 1 periodically contacts and separates from the friction layer during the bending process, a large amount of charge is generated on the surface of the friction layer through triboelectric charging when they are in full contact. When the substrate glass 1 is suspended, warped, or poorly bonded, the reduced contact area or discontinuous contact will cause a decrease in the amplitude of the electrical signal output from the electrode layer or a significant waveform change.

[0033] The electrode layer 3 is a flexible metal film, which can be made of any one of copper foil, aluminum foil, silver nanowire film, conductive carbon film, or tin-plated copper strip. The insulating layer is a high-temperature resistant adhesive layer or a double-sided insulating tape layer. The electrode layer 3 is fixed to the back of the friction layer 2 through the insulating layer. The electrode layer 3 is isolated from the friction layer 2 by the insulating layer, which can effectively prevent the electrode layer 3 from directly contacting the silicone rubber anvil strip 4 and causing electrical interference, while also preventing signal energy leakage. This invention does not require an additional support layer. The friction layer 2 and the electrode layer 3 can be directly attached to or embedded in the upper and lower areas of the silicone rubber of the anvil strip 4, ensuring that the device structure is thin, flexible, and does not change the working state of the anvil strip 4.

[0034] The friction layer 2 and the electrode layer 3 are attached to the peripheral area of ​​the upper surface of the anvil strip 4. The upper surface of the friction layer 2 is 0.1-2 mm higher than the upper surface of the anvil strip 4, or the upper surface of the friction layer 2 is flush with the upper surface of the anvil strip 4. Alternatively, the friction layer 2 and the electrode layer 3 are embedded inside the anvil strip 4, with the upper surface of the friction layer 2 exposed above the upper surface of the anvil strip 4, and the electrode layer 3 located below the friction layer 2. This device has a simple structure and requires no external power supply. It achieves suspended state monitoring through the triboelectric and inductive electrification principle during the contact-separation process between the substrate glass 1 and the detection device, which can effectively improve the quality of cross-cutting and splitting and the product yield.

[0035] Combination Figure 1 The circuit diagram shown illustrates that the glass substrate suspension detection device of this invention comprises a single-electrode triboelectric power generation structure consisting of a friction layer 2 and an electrode layer 3. Its output terminal is sequentially connected to a rectifier bridge circuit and a detection module. The detection module is used to determine the suspension state of the substrate glass based on the received electrical signal and output an alarm signal. Figure 2 As shown in the working principle diagram, when the detection device maintains a certain distance from the substrate glass 1 along with the anvil strip 4 ( Figure 2 In the middle (I), the negative charge on the surface of the friction layer 2 and the positive charge on the electrode layer 3 form an electrostatic balance, at which point no induced current is generated. Once the detection device and the anvil strip 4 approach the substrate glass 1 ( Figure 2 In step II), the electrostatic balance between the friction layer 2 and the electrode layer 3 is disrupted, allowing electrons to flow into the electrode through the grounding terminal and form an induced current. For example... Figure 2 As shown in Figure III, when the detection device and the anvil strip 4 are attached to the substrate glass 1, the substrate glass 1 and the friction layer 2 establish electrostatic equilibrium, and at this time, the electrode layer 3 has no induced positive charge. As the anvil strip 4 completes the prying and moves away from the surface of the substrate glass 1, the electrode layer 3 is affected by the negative charge of the friction layer and generates an electrostatic equilibrium with the substrate glass 1. Figure 2 The opposite induced current in II. When the anvil strip 4 separates from the substrate glass 1 to its limit position ( Figure 2In step IV), the friction layer 2 and electrode layer 3 reach electrostatic equilibrium again, at which point the induced current disappears. Throughout the process, the single-electrode triboelectric generator module, the rectifier bridge circuit, and the external signal interface form an integrated signal path, converting the contact-separation mechanical motion in the plate-breaking action into a collectable electrical signal.

[0036] The signal acquisition module includes a rectifier circuit, specifically a full-bridge rectifier circuit, whose input terminal is electrically connected to electrode layer 3. The module also includes a filter circuit, whose input terminal is electrically connected to the output terminal of the rectifier circuit. Furthermore, the module includes an analog-to-digital converter (ADC), whose input terminal is electrically connected to the output terminal of the filter circuit. The rectifier circuit, composed of four diodes, converts the AC induced signal output from electrode layer 3 into a DC signal. The filter circuit smooths the rectified DC signal to remove high-frequency noise. The ADC converts the analog signal into a digital signal. The signal acquisition module stabilizes the output of the triboelectric nanogenerator to improve detection accuracy. An external signal receiver receives the signal and determines its waveform and amplitude.

[0037] The present invention also provides a detection method using the above-mentioned plate-breaking suspension detection device, comprising the following steps: S1, the friction layer 2 is disposed on the surface of the anvil strip 4, such that the contact surface of the friction layer 2 faces the bottom surface of the substrate glass 1; S2, during the plate-breaking process, the bottom surface of the substrate glass 1 contacts and separates from the contact surface of the friction layer 2, and the surface of the friction layer 2 generates frictional charge, the signal intensity of which is negatively correlated with the distance between the substrate glass and the anvil strip; S3, the electrode layer 3 outputs an induced electrical signal to the signal acquisition module through electrostatic induction; S4, the signal acquisition module acquires the induced electrical signal and obtains the amplitude of the induced electrical signal; S5, the amplitude of the induced electrical signal is compared with a preset threshold, and when the amplitude is lower than the preset threshold, it is determined that the substrate glass 1 is in a suspended state.

[0038] Detection device such as Figure 3 As shown, the components are distributed on both sides of the anvil strip 4. If a portion of the substrate glass 1 is suspended, has a single-sided warped edge, or has both sides flipped, the induced current generated is weakened due to the distance d between the substrate glass 1 and the friction layer 2. At this time, the detection module receives the current signal and alarms for the suspended state. When the detection device and the anvil strip 4 are close to the surface of the substrate glass 1 and are suspended, the induced voltage or current amplitude will be lower than the voltage or current value in the fully bonded state. The external signal receiver receives the electrical signal and judges the signal waveform and amplitude. If the electrical signal value is less than the set threshold, it is determined that the substrate glass is in a suspended state and an alarm is triggered.

[0039] Compared to traditional optical or electrical signal distance detection devices, this invention utilizes a single-electrode triboelectric generator, requiring only one electrode to detect suspension, resulting in an extremely simple overall structure. The single-electrode triboelectric generator module, rectifier bridge circuit, and external signal interface form a unified signal path. When the detection device and the anvil strip 4 approach the surface of the substrate glass 1 and become suspended, the resulting induced voltage or current amplitude will be lower than the voltage or current value in a fully contacted state. The external signal receiver receives the electrical signal and judges the signal waveform and amplitude. If the electrical signal value is less than a set threshold, it determines that the substrate glass 1 is in a suspended state and triggers an alarm. The device can detect the suspension of the substrate glass 1 in a non-contact manner, without power supply or additional sensors. It has a simple structure, is heat-resistant, and can be directly used in existing silicone rubber anvil strip 4 structures. This device has high detection sensitivity and electrical signal output, enabling it to identify the suspension state and issue a warning signal before or at the moment of glass breaking, effectively avoiding quality defects such as cracking, multiple pieces, missing pieces, and falling pieces caused by the suspension of the substrate glass, and improving the yield of glass cutting and breaking processes. By integrating a single-electrode triboelectric nanogenerator structure around the anvil strip, this invention enables real-time monitoring of the glass bonding state. It features a simple structure, low cost, and high reliability, and is suitable for detecting the suspended state of glass plates during cross-cutting or longitudinal cutting processes.

[0040] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of this teaching should not be determined by reference to the foregoing description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed inventive subject matter.

[0041] The above content provides a further detailed description of the present invention. It should not be construed that the specific embodiments of the present invention are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection of the present invention as defined by the submitted claims.

Claims

1. A device for detecting plate suspension based on a single-electrode triboelectric nanogenerator, characterized in that, It includes a friction layer (2), an electrode layer (3), and a signal acquisition module; The friction layer (2) is disposed on the surface of the anvil strip (4), and the friction layer (2) has a contact surface for contacting the bottom surface of the substrate glass (1); The electrode layer (3) is disposed on the back side of the friction layer (2), and an insulating layer is disposed between the electrode layer (3) and the friction layer (2); The signal acquisition module is electrically connected to the electrode layer (3).

2. The plate-breaking suspension detection device based on a single-electrode triboelectric nanogenerator according to claim 1, characterized in that, The friction layer (2) is a polymer film, and the polymer film is made of any one of polytetrafluoroethylene, polyvinylidene fluoride, polyimide or polydimethylsiloxane.

3. The plate-breaking suspension detection device based on a single-electrode triboelectric nanogenerator according to claim 1, characterized in that, The contact surface of the friction layer (2) is provided with a micro-nano structure texture, which is any one of nanowire array, nanopore structure, micro pyramid array or plasma-etched roughened surface.

4. The plate-breaking suspension detection device based on a single-electrode triboelectric nanogenerator according to claim 1, characterized in that, The electrode layer (3) is a flexible metal film, and the material of the flexible metal film is any one of copper foil, aluminum foil, silver nanowire film, conductive carbon film or tin-plated copper strip.

5. The plate-breaking suspension detection device based on a single-electrode triboelectric nanogenerator according to claim 1, characterized in that, The insulating layer is a high-temperature resistant adhesive layer or a double-sided insulating tape layer, and the electrode layer (3) is fixed to the back side of the friction layer (2) through the insulating layer.

6. The plate-breaking suspension detection device based on a single-electrode triboelectric nanogenerator according to claim 1, characterized in that, The friction layer (2) and the electrode layer (3) are attached to the peripheral area of ​​the upper surface of the anvil strip (4). The upper surface of the friction layer (2) is 0.1~2mm higher than the upper surface of the anvil strip (4), or the upper surface of the friction layer (2) is flush with the upper surface of the anvil strip (4).

7. The plate-breaking suspension detection device based on a single-electrode triboelectric nanogenerator according to claim 1, characterized in that, The friction layer (2) and the electrode layer (3) are embedded inside the anvil strip (4), with the upper surface of the friction layer (2) exposed above the upper surface of the anvil strip (4), and the electrode layer (3) located below the friction layer (2).

8. The plate-breaking suspension detection device based on a single-electrode triboelectric nanogenerator according to claim 1, characterized in that, The signal acquisition module includes a rectifier circuit, which is a full-bridge rectifier circuit, and the input terminal of the rectifier circuit is electrically connected to the electrode layer (3). The signal acquisition module also includes a filter circuit, and the input terminal of the filter circuit is electrically connected to the output terminal of the rectifier circuit. The signal acquisition module also includes an analog-to-digital converter circuit, and the input terminal of the analog-to-digital converter circuit is electrically connected to the output terminal of the filter circuit.

9. A detection method using the plate-breaking suspension detection device according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1, the friction layer (2) is disposed on the surface of the anvil strip (4) such that the contact surface of the friction layer (2) faces the bottom surface of the substrate glass (1); S2, during the plate breaking process, the bottom surface of the substrate glass (1) contacts and separates from the contact surface of the friction layer (2), and the surface of the friction layer (2) generates triboelectric charge; S3, the electrode layer (3) outputs an induced electrical signal to the signal acquisition module through electrostatic induction; S4, the signal acquisition module acquires the induced electrical signal and obtains the amplitude of the induced electrical signal; S5, compare the amplitude of the induced electrical signal with a preset threshold, and determine that the substrate glass (1) is in a suspended state when the amplitude is lower than the preset threshold.

10. The detection method according to claim 9, characterized in that, The preset threshold includes a voltage threshold and / or a current threshold. When the amplitude of the induced electrical signal is lower than the preset threshold, a floating alarm signal is output.

Images