Intelligent bolt and monitoring system thereof

Abstract

The utility model discloses an intelligent bolt and a monitoring system thereof, belongs to the technical field of design and testing, and is used for improving the efficiency and reliability of bolt stress condition detection. The intelligent bolt comprises a bolt body, a strain gauge, a shell and a control panel assembly, and the strain gauge is arranged on the bolt body and used for converting deformation quantity brought by the bolt body into electric signals. A cavity is formed in the shell, and the shell is detachably connected to the end of the bolt body. The control panel assembly is arranged in the cavity and comprises a signal processing module, and the signal processing module is electrically connected with the strain gauges and used for obtaining electric signals of the strain gauges so as to convert the electric signals into stress signals of the bolt body. The intelligent bolt is used for connecting different components.

Description

Technical Field

[0001] This application relates to the field of testing technology, and in particular to a smart bolt and its monitoring system. Background Technology

[0002] Bolts are commonly used fasteners in mechanical structures and are widely used in high-stress and high-load scenarios. In order to ensure the reliability of the components connected by bolts, it is particularly important to accurately obtain the stress conditions of bolts during service.

[0003] In related technologies, the stress condition of bolts mainly relies on periodic manual inspection, which is not only time-consuming and inefficient, but also the inspection results are unreliable. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides an intelligent bolt and its monitoring system to improve the efficiency and reliability of bolt stress detection.

[0005] This application is achieved through the following technical solution.

[0006] This application provides a smart bolt, including a bolt body, a strain gauge, a housing, and a control board assembly. The strain gauge is disposed on the bolt body and is used to convert the deformation caused by the bolt body into an electrical signal. The housing has an internal cavity and is detachably connected to the end of the bolt body. The control board assembly is disposed within the cavity and includes a signal processing module electrically connected to the strain gauge for acquiring the electrical signal from the strain gauge and converting it into a stress signal of the bolt body.

[0007] In the technical solution of this application embodiment, the bolt body is installed at the corresponding connection position. The bolt body is subjected to external force and thus deforms. The strain gauge is affected by the deformation of the bolt body and also deforms, thereby generating an electrical signal. Since the signal processing module is electrically connected to the strain gauge, the signal processing module can acquire the electrical signal and convert it into a stress signal of the bolt body, thereby obtaining the stress state of the bolt body and realizing the stress detection of the bolt body. This method is highly efficient and the results are accurate.

[0008] In addition, since the housing is detachably connected to the end of the bolt body, and the control board assembly is located inside the housing, it is easy to detach the housing and control board assembly as a whole from the bolt body. This not only facilitates the maintenance and replacement of the housing and control board as a whole and the bolt body individually, but also allows the stress of multiple different bolt bodies to be detected using a single housing and control board assembly. This eliminates the need to install the housing and control board assembly on each bolt body, thus reducing costs.

[0009] In some embodiments of this application, the end of the housing near the bolt body has a first threaded portion, and the end of the bolt body has a second threaded portion, with the first threaded portion and the second threaded portion threadedly engaged.

[0010] With this configuration, the housing and bolt body can be detachably connected via the threaded engagement of the first and second threaded portions. The threaded connection is not only secure but also easy to disassemble.

[0011] In some embodiments of this application, the first threaded portion includes a sleeve with internal threads, which is connected to the housing; the second threaded portion includes a connecting post with external threads, which is connected to the end of the bolt body; the sleeve is fitted onto the connecting post, and the internal threads and external threads cooperate with each other.

[0012] This configuration allows for a detachable connection between the housing and the bolt body by utilizing the threaded engagement between the internally threaded sleeve and the externally threaded connecting post.

[0013] In some embodiments of this application, the housing includes a first sub-shell portion and a second sub-shell portion, which are interlocked to form a cavity.

[0014] With this configuration, the housing consists of two parts: a first sub-shell and a second sub-shell, which facilitates the installation of the control board assembly.

[0015] In some embodiments of this application, the control board assembly further includes a reading module for electrical connection with an external receiving device; the smart bolt further includes a storage module disposed on the bolt body, the reading module is electrically connected to the storage module, and the storage module stores the identity information of the bolt body.

[0016] With this configuration, the storage module can store the bolt's identification information, such as its serial number and model number. This information can then be transmitted to the reading module, which in turn transmits it to an external receiving device to determine the bolt's identity. Furthermore, since the storage module is located on the bolt itself, the control board assembly and housing can be mounted on different bolts as needed, without affecting the reading module's ability to retrieve the identification information from the storage module on each bolt.

[0017] In some embodiments of this application, the reading module includes an NFC reading chip; the storage module includes an NFC patch, and the NFC reading chip is electrically connected to the NFC patch.

[0018] With this setup, the NFC reader chip and the NFC patch are wirelessly connected, which facilitates the installation and removal of the housing and control board assembly as a whole, along with different bolt bodies.

[0019] In some embodiments of this application, the control board assembly further includes a signal interface electrically connected to the signal processing module. The smart bolt also includes a connecting wire, a first end of which is connected to the strain gauge, and a second end of which extends into the cavity for detachable connection to the signal interface.

[0020] This setup allows for electrical connection between the strain gauge and the signal processing module using connecting lines and signal interfaces. Since the second end of the connecting line is detachably connected to the signal interface, it facilitates the detachment of the strain gauge and the control board assembly, and the detachable connection of the housing and the control board assembly as a whole to the bolt body.

[0021] In some embodiments of this application, the bolt body has a through hole along the extension direction of the bolt body, and a strain gauge is disposed in the through hole and in contact with the bolt body.

[0022] This setup facilitates the strain gauge's perception of the bolt's deformation, ensuring the accuracy of the detection.

[0023] In some embodiments of this application, the through-hole is filled with colloid, and the colloid coats the strain gauge.

[0024] This setup not only utilizes the colloid to fix the strain gauge, but also allows the deformation of the bolt body along the extension direction of the through hole to be directly or through the colloid to the strain gauge, thereby improving the accuracy of the test.

[0025] In some embodiments of this application, the control board assembly further includes a wireless transmission module, which is electrically connected to the signal processing module and is also used to be electrically connected to an external receiving device; the wireless transmission module is used to at least receive the stress signal of the bolt body and transmit it to the receiving device.

[0026] With this setup, the stress signal of the bolt body generated by the signal processing module can be transmitted to an external receiving device via a wireless transmission module. Wireless transmission does not require complex wiring connections, which can improve the simplicity of the structure.

[0027] In some embodiments of this application, the housing has a through hole communicating with the cavity, and the antenna of the wireless transmission module extends into the through hole.

[0028] This setting can improve the sensitivity of signal transmission of the wireless transmission module.

[0029] In some embodiments of this application, the smart bolt further includes a transmission line; the control board assembly further includes a communication module electrically connected to the signal processing module and connected to a first end of the transmission line, the second end of the transmission line passing through the housing for connection to an external receiving device; the communication module is used to receive at least the stress signal of the bolt body and transmit it to the receiving device via the transmission line.

[0030] With this setup, the stress signal of the bolt body generated by the signal processing module can be transmitted to an external receiving device via the communication module and transmission line. The wired connection is more reliable and the transmission is more stable.

[0031] A second aspect of this application provides a monitoring system for smart bolts, including at least one smart bolt as described in any of the above embodiments, a receiving device, and a processing device. The receiving device is electrically connected to the signal processing module of the smart bolt and is used to acquire the stress signal of the bolt body of the smart bolt. The processing device is electrically connected to the receiving device.

[0032] In the technical solution of this application embodiment, the stress signal of the bolt body emitted by the signal processing module can be transmitted to the receiving device, and then to the processing device, which can process the stress signal. This facilitates the monitoring of the stress on the bolt body. Attached Figure Description

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0034] Figure 1 A schematic diagram of the external structure of a smart bolt monitoring system provided for some embodiments of this application;

[0035] Figure 2 Another external structural schematic diagram of the smart bolt monitoring system provided for some embodiments of this application;

[0036] Figure 3 A partial cross-sectional schematic diagram of a smart bolt provided for some embodiments of this application;

[0037] Figure 4 Schematic diagram of the electrical connections of the control board assembly and strain gauges provided for some embodiments of this application;

[0038] Figure 5 A cross-sectional schematic diagram of a smart bolt provided for some embodiments of this application;

[0039] Figure 6 A schematic diagram of the electrical connections between the control panel assembly, strain gauge, and receiving device provided for some embodiments of this application;

[0040] Figure 7 Top view schematic diagram of a smart bolt provided for some embodiments of this application;

[0041] Figure 8Another schematic diagram showing the electrical connections of the control panel assembly, strain gauge, and receiving device provided for some embodiments of this application;

[0042] Figure 9 Another partial cross-sectional schematic diagram of a smart bolt provided for some embodiments of this application;

[0043] Figure 10 Another cross-sectional schematic diagram of a smart bolt provided for some embodiments of this application.

[0044] Explanation of reference numerals in the attached figures

[0045] 01- Monitoring system for smart bolts;

[0046] 1-Smart bolt; 11-Bolt body; 11a-Through hole; 12-Strain gauge; 13-Shell; 13a-Cavity; 13b-Through hole; 13c-Allowing hole; 131-First sub-shell; 132-Second sub-shell; 14-Control board assembly; a-Signal processing module; a1-Bridge circuit; a2-AD conversion circuit; a3-Microcontroller unit; b-Reading module; c-Self-storage chip; d-Output circuit; e-Wireless transmission module; f-Communication module; 15-First threaded part; 16-Second threaded part; 17-Connecting line; 18-Storage module; 19-Transmission line; 20-Protective washer;

[0047] 2-Receiving device;

[0048] 3-Processing device; 31-Host computer; 32-Cloud system; 33-Terminal access device. Detailed Implementation

[0049] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0051] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0052] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0053] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0054] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0055] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0056] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0057] The following is a detailed description of this application.

[0058] Bolts are commonly used fasteners in mechanical structures and are widely used in high-stress and high-load scenarios. During the service life of a bolt, it will be subjected to forces from the different components it connects to. In order to ensure the reliability of the components connected by the bolt, it is necessary to accurately obtain the stress condition of the bolt.

[0059] In related technologies, the stress condition of bolts mainly relies on periodic manual inspection, which is not only time-consuming and inefficient, but also the inspection results are unreliable.

[0060] Based on this, such as Figure 1 As shown, this application provides a smart bolt monitoring system 01, including at least one smart bolt 1, a receiving device 2, and a processing device 3. The receiving device 2 is electrically connected to the signal processing module a of the smart bolt 1, and is used to acquire the stress signal of the bolt body 11 of the smart bolt 1. The processing device 3 is electrically connected to the receiving device 2.

[0061] Among them, such as Figure 1 As shown, the receiving device 2 can obtain stress information from the signal processing module a via wireless transmission. Wireless transmission solves the problem of the positional relationship between the signal processing module a and the receiving device 2, facilitating their respective configurations. Alternatively, as... Figure 2 As shown, receiving device 2 can also obtain stress information from signal processing module a via wired transmission. Wired transmission provides a more stable and reliable signal delivery.

[0062] In some examples, such as Figure 1 , Figure 2 As shown, the processing device 3 includes a host computer 31, a cloud system 32, and a terminal access device 33. The receiving device 2 is electrically connected to the host computer 31, the host computer 31 is electrically connected to the cloud system 32, and the cloud system 32 is electrically connected to the terminal access device 33. After receiving the stress signal from the bolt body 11, the receiving device 2 transmits the signal to the host computer 31. Within the host computer 31, the stress signal is processed into readable stress information, which is then transmitted to the cloud system 32. The terminal access device 33 can then access the cloud system 32 to obtain the final stress information, thereby enabling stress monitoring of the smart bolt 1. By setting up the cloud system 32, users can easily monitor the stress state of the bolt body 11 of the smart bolt 1 remotely, improving the convenience of monitoring.

[0063] For example, the terminal access device 33 can be a mobile phone or a computer, etc. In addition, the number of terminal access devices 33 can be one or more, such as two, three, five or ten, etc.

[0064] With the above setup, the stress signal of the bolt body 11 emitted by the signal processing module a can be transmitted to the receiving device 2, and then to the processing device 3. The processing device 3 can process the stress signal to form stress information, thereby monitoring the stress condition of the bolt body 11. This method is highly efficient and produces accurate results.

[0065] Based on this, such as Figure 3 As shown, this application also provides a smart bolt 1, which includes a bolt body 11, a strain gauge 12, a housing 13, and a control board assembly 14. The strain gauge 12 is disposed on the bolt body 11 and is used to convert the deformation caused by the bolt body 11 into an electrical signal. The housing 13 has a cavity 13a inside and is detachably connected to the end of the bolt body 11. The control board assembly 14 is disposed in the cavity 13a and includes a signal processing module a. The signal processing module a is electrically connected to the strain gauge 12 and is used to acquire the electrical signal of the strain gauge 12 and convert it into a stress signal of the bolt body 11.

[0066] In this embodiment, the bolt body 11 is a headless bolt consisting only of a threaded rod, or the bolt body 11 may be a bolt including both a threaded rod and a head. This application uses a headless bolt as an example for illustration.

[0067] It is understandable that the principle of strain gauge 12 is as follows: when the bolt body 11 is subjected to force, it will deform. The strain gauge 12 will also deform due to the deformation of the bolt body 11. Thus, the resistance of the strain gauge 12 will change, thereby outputting a corresponding electrical signal to the signal processing module a on the control board assembly 14. The signal processing module a processes the electrical signal and converts it into the stress signal of the bolt body 11.

[0068] In addition, such as Figure 4 The signal processing module a includes a bridge circuit a1 (e.g., a Wheatstone bridge circuit), an AD conversion circuit a2 (analog-to-digital converter), and a micro control unit a3 (Micro Control Unit; MCU). The bridge circuit a1 is electrically connected to the strain gauge 12 and is used to receive the electrical signal from the strain gauge 12 and convert the electrical signal into a voltage signal. The AD conversion circuit a2 is electrically connected to the bridge circuit a1 to obtain the voltage signal and convert the voltage signal into a stress signal. The micro control unit a3 is electrically connected to the AD conversion circuit a2 and is used to collect the stress signal and control it in a coordinated manner.

[0069] In some examples, the control board assembly 14 also includes a board body on which the signal processing module a is disposed, and the board body is fixed to the housing 13. For example, the board body is fixed to the housing 13 by means of screws or other methods.

[0070] With the above setup, the bolt body 11 is installed at the corresponding connection position. The bolt body 11 will be subjected to external force and thus deform. The strain gauge 12 will also deform due to the deformation of the bolt body 11, thereby generating an electrical signal. Since the signal processing module a is electrically connected to the strain gauge 12, the signal processing module a can acquire the electrical signal and convert it into a stress signal of the bolt body 11, thereby obtaining the stress state of the bolt body 11 and realizing the stress detection of the bolt body 11. This method is highly efficient and yields accurate results.

[0071] Furthermore, since the housing 13 is detachably connected to the end of the bolt body 11, and the control board assembly 14 is disposed inside the housing 13, it is convenient to detach the housing 13 and the control board assembly 14 as a whole from the bolt body 11. This not only facilitates the maintenance and replacement of the housing 13 and the control board assembly 14 as a whole, but also allows the stress on multiple different bolt bodies 11 to be detected using a single housing 13 and control board assembly 14. This eliminates the need to install the housing 13 and control board assembly 14 on each bolt body 11, thus reducing costs.

[0072] The detachable connection between the housing 13 and the bolt body 11 can be varied. For example, the housing 13 and the bolt body 11 can be connected by snap-fit, threaded connection, screw or other fasteners, or adhesive, etc. A detailed description follows.

[0073] In some embodiments, such as Figure 5 As shown, the end of the housing 13 near the bolt body 11 has a first threaded portion 15, and the end of the bolt body 11 has a second threaded portion 16. The first threaded portion 15 and the second threaded portion 16 are threadedly engaged.

[0074] It should be noted that, as Figure 5 As shown, the housing 13 and the first threaded portion 15 are divided by the dashed line M, and the bolt body 11 and the second threaded portion 16 are divided by the dashed line L. The first threaded portion 15 can be part of the housing 13, and the two are integrally formed. Alternatively, the first threaded portion 15 and the housing 13 can be two separate parts, with the housing 13 and the first threaded portion 15 machined separately and then joined together. Similarly, the second threaded portion 16 can be part of the bolt body 11, and the two are integrally formed. Alternatively, the second threaded portion 16 and the bolt body 11 can be two separate parts, and then joined together.

[0075] With the above configuration, the housing 13 and the bolt body 11 can be detachably connected through the threaded engagement of the first threaded portion 15 and the second threaded portion 16. The threaded connection is not only reliable but also easy to disassemble.

[0076] Based on this, in some embodiments, such as Figure 5 As shown, the first threaded portion 15 includes a sleeve with internal threads, which is connected to the housing 13. The second threaded portion 16 includes a connecting post with external threads, which is connected to the end of the bolt body 11. The sleeve is fitted onto the connecting post, and the internal and external threads engage with each other.

[0077] In some examples, the connecting post is coaxially arranged with the bolt body 11, and the connecting post is part of the bolt body 11. This arrangement not only enables the threaded connection between the housing 13 and the bolt body 11, but also, since the connecting post is part of the bolt body 11, only the bolt body 11 needs to be machined during processing. The length of the bolt body 11 is made slightly longer than the theoretical length required to connect different components, so a section can be reserved at the end of the bolt body 11 as the second threaded portion 16, thus improving the ease of machining the bolt body 11 and the second threaded portion 16.

[0078] With the above configuration, when installing the housing 13 and the bolt body 11, simply align the end of the sleeve with the end of the connecting post, and then rotate the sleeve in the first rotation direction to fit the sleeve onto the connecting post. When disassembling the housing 13 and the bolt body 11, simply rotate the sleeve in the opposite direction of the first rotation direction to remove the sleeve from the connecting post, thus achieving a detachable connection between the housing 13 and the bolt body 11. This type of connection is convenient to operate and facilitates the machining of both the connecting post and the bolt body 11.

[0079] In other embodiments, the first threaded portion 15 and the second threaded portion 16 may also be arranged in opposite directions. The first threaded portion 15 is a columnar structure with external threads, and the second threaded portion 16 is a sleeve structure with internal threads. The sleeve structure is fitted onto the columnar structure, and the internal threads and external threads are threadedly engaged. In this way, the threaded detachable connection between the housing 13 and the bolt body 11 can also be achieved.

[0080] In some embodiments, such as Figure 5 As shown, the housing 13 includes a first sub-housing portion 131 and a second sub-housing portion 132, which are interlocked to form a cavity 13a.

[0081] In some examples, such as Figure 5As shown, along the extension direction of the bolt body 11, a first sub-shell portion 131 and a second sub-shell portion 132 are sequentially arranged, with the second sub-shell portion 132 located between the first sub-shell portion 131 and the bolt body 11. The second sub-shell portion 132 is detachably connected to the bolt body 11. This arrangement, with the first sub-shell portion 131 located at the end of the second sub-shell portion 132 furthest from the bolt body 11, ensures that the installation of the first sub-shell portion 131 and the second sub-shell portion 132 is not affected by the bolt body 11, and that the detachable connection between the second sub-shell portion 132 and the bolt body 11 is also unaffected by the first sub-shell portion 131, facilitating their respective installation operations.

[0082] In some examples, the first sub-shell 131 and the second sub-shell 132 are detachably connected, which facilitates the installation and removal of the control board assembly 14.

[0083] For example, the first sub-shell portion 131 and the second sub-shell portion 132 are threadedly connected. Specifically, an internal thread is formed on the inner wall of the first sub-shell portion 131, and an external thread is formed on the outer wall of the second sub-shell portion 132. The second sub-shell portion 132 extends into the opening of the first sub-shell portion 131, and the internal thread and the external thread are threadedly engaged, thereby realizing the threaded connection between the first sub-shell portion 131 and the second sub-shell portion 132.

[0084] Of course, the first sub-shell 131 and the second sub-shell 132 can also be detachably connected by snap-fit.

[0085] By setting the housing 13 into two parts, a first sub-housing part 131 and a second sub-housing part 132, when installing the control board assembly 14, the control board assembly 14 can be placed in the first sub-housing part 131 or the second sub-housing part 132 first, and then the first sub-housing part 131 and the second sub-housing part 132 can be fastened together, thus realizing the installation of the control board assembly 14. This operation is simple.

[0086] The electrical connection between strain gauge 12 and signal processing module a can be wireless or wired.

[0087] In some embodiments, such as Figure 5 As shown, the control board assembly 14 also includes a signal interface electrically connected to the signal processing module a. The smart bolt 1 also includes a connecting wire 17, the first end of which is connected to the strain gauge 12, and the second end of which extends into the cavity 13a for detachable connection to the signal interface.

[0088] The number of connecting wires 17 can be one or more. For example, there can be two connecting wires 17, and the second end of both signal wires is detachably connected to the signal interface. This ensures the stability and accuracy of signal transmission.

[0089] In some examples, the signal interface is located on the board of the control board assembly 14, and the signal interface is electrically connected to the signal processing module a through the board.

[0090] With the above setup, the electrical connection between the strain gauge 12 and the signal processing module a can be achieved using the connecting cable 17 and the signal interface. In this way, the electrical signal of the strain gauge 12 can be conducted to the signal interface via the connecting cable 17, and then transmitted to the signal processing module a. The wired connection method provides more reliable and stable signal transmission. Furthermore, since the second end of the connecting cable 17 is detachably connected to the signal interface, when it is necessary to separate the housing 13 and control board assembly 14 from the bolt body 11 and strain gauge 12 as a whole, it is only necessary to pull the second end of the connecting cable 17 out of the signal interface, and then separate the housing 13 and bolt body 11. In this way, the strain gauge 12 can be permanently fixed to the bolt body 11, avoiding repeated installation and removal of the strain gauge 12.

[0091] The different installation positions of the strain gauge 12 on the bolt body 11 have a significant impact on the stress condition of the bolt plate detected by the strain gauge 12.

[0092] In some embodiments, such as Figure 3 As shown, the bolt body 11 has a through hole 11a along the extension direction of the bolt body 11, and the strain gauge 12 is disposed in the through hole 11a and contacts the bolt body 11.

[0093] The diameter of the through hole 11a can be between 2.0mm and 3.0mm. For example, the diameter of the through hole 11a can be 2.0mm, 2.3mm, 2.5mm, 2.8mm or 3.0mm.

[0094] For example, the diameter of the through hole 11a is 2.5mm. This not only facilitates the processing of the through hole 11a and ensures the installation of the strain gauge 12, but also facilitates the collection of the deformation state of the bolt body 11 by the strain gauge 12.

[0095] In some examples, the strain gauge 12 is positioned at the middle of the through hole 11a along the extension direction of the through hole 11a, so that the detection of the strain gauge 12 can take into account various positions along the length of the bolt body 11.

[0096] In some examples, such as Figure 5 As shown, the smart bolt 1 includes a connecting wire 17, part of which is disposed within a through hole 11a. The connecting wire 17 is detachably connected to a signal interface through the through hole 11a. This allows the connecting wire 17 to be embedded within the bolt body 11, preventing damage to the connecting wire 17.

[0097] In some examples, the centerline of the through hole 11a coincides with the centerline of the bolt body 11, which allows for more accurate and sensitive acquisition of the deformation of the bolt body 11, ensuring the accuracy of the detection results.

[0098] With the above settings, when the bolt body 11 deforms, the through hole 11a will also deform, thereby squeezing the strain gauge 12 located in the through hole 11a, causing the strain gauge 12 to deform. Since the strain gauge 12 is embedded inside the bolt body 11, the accuracy and sensitivity of the strain gauge 12 in collecting the deformation of the bolt body 11 can be guaranteed, thereby ensuring the accuracy of the detection results.

[0099] Of course, in other embodiments, the strain gauge 12 may also be fixed to the outer surface of the bolt body 11.

[0100] In some embodiments, the through hole 11a is filled with colloid, and the colloid coats the strain gauge 12.

[0101] The adhesive is a fixing adhesive, and the type of solid adhesive is not specifically limited, as long as it can be sensitive to the deformation of the bolt body 11.

[0102] In some examples, the colloid fills the entire through hole 11a. In this way, no matter where the bolt body 11 deforms along the extension direction of the through hole 11a, the deformation result will be transmitted to the strain gauge 12 through the colloid, thus ensuring the sensitivity and accuracy of the detected structure.

[0103] With the above configuration, the strain gauge 12 can be fixed in the through hole 11a by the adhesive. In addition, due to the adhesive, when the bolt body 11 is subjected to force and deforms, the deformation can be transmitted to the strain gauge 12 through the adhesive, thereby causing the strain gauge 12 to deform. In this way, along the extension direction of the through hole 11a, the strain gauge 12 can detect the deformation of a larger range of the bolt body 11, which can improve the accuracy of the detection.

[0104] In the intelligent bolt monitoring system 01, there are often multiple bolt bodies 11. Therefore, it is necessary to distinguish different bolt bodies 11 and determine the location of different bolt bodies 11 so as to replace the bolt body 11.

[0105] In some embodiments, such as Figure 5 , Figure 6 As shown, the control board assembly 14 also includes a reading module b, which is electrically connected to an external receiving device 2. The smart bolt 1 also includes a storage module 18 disposed on the bolt body 11. The reading module b is electrically connected to the storage module 18, and the storage module 18 stores the identity information of the bolt body 11.

[0106] The identification information of the bolt body 11 may include information such as the bolt body 11's number and model.

[0107] In some examples, such as Figure 6 As shown, signal processing module a includes a bridge circuit a1, an AD conversion circuit a2, and a microcontroller unit a3. Reading module b is electrically connected to microcontroller unit a3, and microcontroller unit a3 is electrically connected to receiving device 2. Thus, reading module b can read the identity information of bolt body 11 stored in storage module 18, and then transmit the identity information to microcontroller unit a3, which in turn transmits it to receiving device 2.

[0108] In some examples, a storage space is formed between the housing 13 and the bolt body 11, and a storage module 18 is disposed within the storage space and connected to the bolt body 11. This arrangement, where the storage module 18 is embedded between the ends of the housing 13 and the bolt body 11, provides protection for the storage module 18.

[0109] For example, when the strain gauge 12 is electrically connected to the signal processing module a via the connecting line 17, and the connecting line 17 is disposed within the through hole 11a of the bolt body 11, the storage module 18 can avoid the port of the through hole 11a and the connecting line 17.

[0110] With the above configuration, the storage module 18 can store the identification information of the bolt body 11, such as the bolt body 11's number and location information. This identification information can then be transmitted to the reading module b, which in turn transmits it to the external receiving device 2 to determine the bolt body 11's identity. Furthermore, since the storage module 18 is located on the bolt body 11, the control board assembly 14 and the housing 13 can be installed on different bolt bodies 11 as needed, without affecting the reading module b's ability to obtain the identification information stored in the storage module 18 on different bolt bodies 11.

[0111] The reading module b and the storage module 18 can be electrically connected via a wired connection or via a wireless connection.

[0112] In some embodiments, the reading module b includes an NFC reading chip. The storage module 18 includes an NFC patch, and the NFC reading chip is electrically connected to the NFC patch.

[0113] NFC stands for Near Field Communication.

[0114] With the above settings, the NFC reading chip and the NFC patch are wirelessly connected. When it is necessary to separate the housing 13 and the control board assembly 14 from the bolt body 11, there is no need to consider the electrical connection between the NFC reading chip and the NFC patch. This facilitates the installation and removal of the housing 13 and the control board assembly 14 as a whole from different bolt bodies 11.

[0115] In some embodiments, such as Figure 6 As shown, the control board assembly 14 also includes its own storage chip c, which is electrically connected to the receiving device 2, and stores the identity information of the control board assembly 14 inside the storage chip c.

[0116] For example, the identification information of the control board assembly 14 includes information such as the model and serial number of the control board assembly 14.

[0117] In some examples, the signal processing module a includes a bridge circuit a1, an AD conversion circuit a2, and a microcontroller unit a3. Its own memory chip c is electrically connected to the microcontroller unit a3, and the microcontroller unit a3 is electrically connected to the receiving device 2. Thus, the own memory chip c can transmit the identity information of the control board assembly 14 to the microcontroller unit a3, and then through the microcontroller unit a3 to the receiving device 2, thereby simplifying the connection.

[0118] With this configuration, the identification information of the control board assembly 14 can be transmitted to the external receiving device 2, thereby determining the identification information of the control board assembly 14. Especially in the intelligent bolt monitoring system 01, when there are multiple control board assemblies 14, this configuration allows for the differentiation of different control board assemblies 14.

[0119] In some embodiments, such as Figure 6 As shown, the control board assembly 14 includes a signal processing module a, a reading module b, a self-storage chip c, and an output circuit d; the signal processing module a includes a bridge circuit a1, an AD conversion circuit a2, and a microcontroller unit a3. The smart bolt 1 includes a storage module 18. The strain gauge 12 is electrically connected to the bridge circuit a1, the bridge circuit a1 is electrically connected to the AD conversion circuit a2, and the AD conversion circuit a2 is electrically connected to the microcontroller unit a3; the storage module 18 is electrically connected to the reading module b, and the reading module b is electrically connected to the microcontroller unit a3; the self-storage chip c is electrically connected to the microcontroller unit a3; the microcontroller unit a3 is electrically connected to the output circuit d; and the output circuit d is electrically connected to the receiving device 2.

[0120] With this configuration, the stress signal of the bolt body 11, the identification information of the bolt body 11, and the identification information of the control board assembly 14 can all be transmitted to the microcontroller a3, and then to the receiving device 2. This allows for better positioning and monitoring of different smart bolts 1 within the smart bolt monitoring system 01.

[0121] To transmit the signals that need to be transmitted in the smart bolt 1 to the receiving device 2, wired or wireless methods can be used for transmission.

[0122] In some embodiments, such as Figure 5 , Figure 6 As shown, the control board assembly 14 also includes a wireless transmission module e, which is electrically connected to the signal processing module a. The wireless transmission module e is also used for electrical connection with an external receiving device 2. The wireless transmission module e is used to receive at least the stress signal of the bolt body 11 and transmit it to the receiving device 2.

[0123] It is understandable that, in this case, receiving device 2 is wireless receiving device 2.

[0124] Among them, the wireless transmission module e can be a long-range radio (LoRa) transmission module, a narrow-band Internet of Things (NB-IoT) transmission module, a wireless personal area network (Bee RF) communication technology (ZigBee) transmission module, or a Wi-Fi wireless transmission module.

[0125] In some examples, the signal processing module a includes a bridge circuit a1, an AD conversion circuit a2, and a microcontroller unit a3. The control board assembly 14 includes an output circuit d. The wireless transmission module e is electrically connected to the output circuit d. Thus, the signals output from the output circuit d (e.g., the stress signal of the bolt body 11, the identification information of the bolt body 11, and the identification information of the control board assembly 14) are transmitted to the wireless transmission module e, and then wirelessly transmitted to the receiving device 2. That is, in this case, the wireless transmission module e is also used to receive the identification information of the bolt body 11 and the identification information of the control board assembly 14.

[0126] In some examples, the smart bolt 1 also includes a battery, such as a button cell battery, which is electrically connected to the control board assembly 14 to power the control board assembly 14.

[0127] With the above settings, the stress signal of the bolt body 11 generated by the signal processing module a can be transmitted to the external receiving device 2 through the wireless transmission module e. Wireless transmission does not require complex wiring connections, which can improve the simplicity of the structure.

[0128] Based on this, in some embodiments, such as Figure 5 , Figure 7 As shown, the housing 13 has a through hole 13b communicating with the cavity 13a, and the antenna of the wireless transmission module e extends into the through hole 13b.

[0129] Among them, the via 13b can be a regular hole such as a round hole or a square hole, or it can be an irregular hole.

[0130] In addition, the via 13b can be formed at any suitable location on the housing 13, such as on the top wall or the peripheral wall of the housing 13.

[0131] In some examples, the antenna of the wireless transmission module e can fill the through-hole 13b, and the top of the antenna of the wireless transmission module e is flush with the outer surface of the housing 13. This ensures a more aesthetically pleasing overall appearance for the smart bolt 1.

[0132] For example, along the extension direction of the bolt body 11, the housing 13 includes a first sub-housing portion 131 and a second sub-housing portion 132 arranged sequentially, and the second sub-housing portion 132 is disposed between the first sub-housing portion 131 and the bolt body 11, and a through hole 13b is formed on the top surface of the first sub-housing portion 131.

[0133] With the above settings, the stress signal converted by the signal processing module a can be transmitted to the wireless transmission module e, and then transmitted to the receiving device 2 through the antenna of the wireless transmission module e. The through hole 11a can improve the sensitivity and accuracy of signal transmission of the wireless transmission module e.

[0134] In other embodiments, such as Figure 8 , Figure 9 As shown, the smart bolt 1 also includes a transmission line 19. The control board assembly 14 also includes a communication module f, which is electrically connected to the signal processing module a and connected to a first end of the transmission line 19. The second end of the transmission line 19 passes through the housing 13 for connection to an external receiving device 2. The communication module f is used to receive at least the stress signal of the bolt body 11 and transmit it to the receiving device 2 via the transmission line 19.

[0135] Understandably, in this situation, the control board assembly 14 can be powered using the transmission line 19.

[0136] In some examples, signal processing module a includes a bridge circuit a1, an AD conversion circuit a2, and a microcontroller unit a3. Control board assembly 14 includes an output circuit d. Communication module f is electrically connected to output circuit d. Thus, signals output from output circuit d (e.g., stress signals of bolt body 11, identification information of bolt body 11, and identification information of control board assembly 14) are transmitted to communication module f and then wired to receiving device 2 via transmission line 19. In this case, communication module f is also used to receive identification information of bolt body 11 and identification information of control board assembly 14.

[0137] In some examples, such as Figure 10 As shown, a clearance hole 13c is provided on the housing 13, which is connected to the cavity 13a. The second end of the transmission line 19 is connected to the receiving device 2 through the clearance hole 13c.

[0138] For example, the smart bolt 1 also includes a protective washer 20, which is disposed within the clearance hole 13c and surrounds the transmission line 19. The protective washer 20 can protect the transmission line 19, preventing the transmission line 19 from directly rubbing against the edge of the clearance hole 13c, and extending the service life of the transmission line 19.

[0139] The protective gasket 20 can be made of rubber.

[0140] In addition, the clearance hole 13c can be formed on the top wall or the peripheral wall of the housing 13.

[0141] With the above settings, the stress signal of the bolt body 11 generated by the signal processing module a can be transmitted to the external receiving device 2 through the communication module f and the transmission line 19. The wired connection is more reliable and the transmission is more stable.

[0142] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A smart bolt, characterized in that, include: Bolt body; A strain gauge is disposed on the bolt body to convert the deformation caused by the bolt body into an electrical signal. A housing having an internal cavity, the housing being detachably connected to the end of the bolt body; A control board assembly is disposed within the cavity. The control board assembly includes a signal processing module, which is electrically connected to the strain gauge and is used to acquire the electrical signal of the strain gauge and convert it into a stress signal of the bolt body. The housing includes a first sub-shell portion and a second sub-shell portion, which are interlocked to form the cavity.

2. The smart bolt according to claim 1, characterized in that, The housing has a first threaded portion at one end near the bolt body, and the bolt body has a second threaded portion at the end, with the first threaded portion and the second threaded portion being threadedly engaged.

3. The smart bolt according to claim 2, characterized in that, The first threaded portion includes a sleeve with internal threads, which is connected to the housing; the second threaded portion includes a connecting post with external threads, which is connected to the end of the bolt body; the sleeve is fitted onto the connecting post, and the internal threads and the external threads engage with each other.

4. The smart bolt according to claim 1, characterized in that, The control board assembly further includes a reading module for electrical connection with an external receiving device; the smart bolt further includes a storage module disposed on the bolt body, the reading module is electrically connected to the storage module, and the storage module stores the identity information of the bolt body.

5. The smart bolt according to claim 4, characterized in that, The reading module includes an NFC reading chip; the storage module includes an NFC patch, and the NFC reading chip is electrically connected to the NFC patch.

6. The smart bolt according to claim 1, characterized in that, The control board assembly also includes a signal interface electrically connected to the signal processing module; the smart bolt also includes a connecting wire, the first end of which is connected to the strain gauge, and the second end of which extends into the cavity to be detachably connected to the signal interface.

7. The smart bolt according to claim 1, characterized in that, The bolt body has a through hole along the extension direction of the bolt body, and the strain gauge is disposed in the through hole and in contact with the bolt body.

8. The smart bolt according to claim 7, characterized in that, The through-hole is filled with colloid, and the colloid coats the strain gauge.

9. The smart bolt according to any one of claims 1 to 8, characterized in that, The control board assembly also includes a wireless transmission module, which is electrically connected to the signal processing module and is also used to electrically connect to an external receiving device; the wireless transmission module is used to receive at least the stress signal of the bolt body and transmit it to the receiving device.

10. The smart bolt according to claim 9, characterized in that, The housing has a through hole communicating with the cavity, and the antenna of the wireless transmission module extends into the through hole.

11. The smart bolt according to any one of claims 1 to 8, characterized in that, The smart bolt also includes a transmission line; the control board assembly also includes a communication module, which is electrically connected to the signal processing module and connected to a first end of the transmission line, the second end of the transmission line passing through the housing for connection to an external receiving device; the communication module is used to receive stress signals from the bolt body and transmit them to the receiving device via the transmission line.

12. A monitoring system for intelligent bolts, characterized in that, include: At least one smart bolt according to any one of claims 1 to 11; The receiving device is electrically connected to the signal processing module of the smart bolt and is used to acquire the stress signal of the bolt body of the smart bolt. The processing device is electrically connected to the receiving device.

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