An industrial wireless signal transmission system

Abstract

This invention relates to the field of industrial wireless communication technology and discloses an industrial wireless signal transmission system, including: signal acquisition, edge processing, bearer communication, and link management modules. The link management module performs path switching based on link status parameters of Ethernet and cellular communication interfaces. The core of this system lies in using modular pre-installed node boards to support each module. The node boards have physical isolation slots between the acquisition and processing area and the bearer communication area. The node boards have a biomimetic skeletal support frame determined by variable-density topology optimization, and the physical isolation slots serve as geometric boundary constraints for topology evolution, guiding the support path of the support frame to evolve and distribute along its edges. By transforming physical isolation features into mechanical constraints that participate in structural evolution, the system solves the problem of functional zoning being easily ignored or assimilated in traditional optimization, achieving deep synergy between the vibration resistance of the integrated structure and the stability of the functional layout.

Description

Technical Field

[0001] This invention relates to the field of industrial wireless communication technology, specifically to an industrial wireless signal transmission system. Background Technology

[0002] Industrial wireless signal transmission systems refer to data transmission devices or systems applied in industrial settings. They are used to collect, process, and transmit industrial field signals generated by sensors, instruments, equipment controllers, etc., to application layers such as host computers, servers, or the cloud to achieve functions such as monitoring, control, alarms, and data management. Industrial wireless signal transmission systems typically also include acquisition and processing units, communication bearer units, and installation and integration structures adapted to the industrial environment, enabling reliable uplink signal transmission in scenarios such as factories, computer rooms, and sites. Existing industrial wireless signal transmission systems usually adopt the method of installing signal acquisition and communication modules separately on general-purpose housings, ordinary mounting plates, or brackets. When meeting the uplink communication requirements of Ethernet or 4G / 5G, it is often necessary to arrange the acquisition and processing area and the communication bearer area on the same mounting platform.

[0003] However, current technologies often employ general-purpose flat panels or empirically-based structural designs, which commonly suffer from a disconnect between structural topology evolution and functional domain distribution logic. This makes it difficult to stably retain necessary structural features during structural weight reduction or optimization, resulting in a lack of coordination between the installation integration structure and functional zoning layout. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an industrial wireless signal transmission system that solves the problem that the physical isolation area of ​​the installation structure is weakened or removed during weight reduction optimization due to the disconnect between structural topology optimization and functional zoning logic, thus making it impossible to achieve collaborative design between functional zoning and the load-bearing structure.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an industrial wireless signal transmission system, comprising:

[0006] The signal acquisition module is used to acquire signals from the industrial field and output acquired data frames;

[0007] An edge processing module is used to encapsulate the acquired data frames and output an uplink data stream;

[0008] The bearer communication module is used to send the uplink data stream to the application layer. The bearer communication module includes an Ethernet communication interface and a cellular communication interface.

[0009] The link management module is used to obtain the link status parameters of the Ethernet communication interface and the cellular communication interface, and when the link status of the Ethernet communication interface does not meet the preset transmission conditions, switch the transmission path of the uplink data stream from the Ethernet communication interface to the cellular communication interface.

[0010] A modular pre-installed node board is used to carry the signal acquisition module, the edge processing module, the bearer communication module and the link management module. The modular pre-installed node board is equipped with a standardized installation interface and is divided into an acquisition and processing layout area and a bearer communication layout area, as well as a physical isolation slot located between the acquisition and processing layout area and the bearer communication layout area.

[0011] The modular prefabricated node plate has a biomimetic skeletal support frame. The shape distribution of the biomimetic skeletal support frame is determined by a variable density topology optimization calculation for the design domain of the modular prefabricated node plate. The support path of the biomimetic skeletal support frame is constrained by the geometric boundary constraints formed by the physical isolation groove within the design domain.

[0012] This invention provides an industrial wireless signal transmission system. It has the following beneficial effects:

[0013] 1. This invention generates a biomimetic skeletal support frame by setting a physical isolation slot between the acquisition and processing area and the carrier communication area, and setting the area corresponding to the physical isolation slot as a non-design domain to participate in variable density topology optimization. This achieves the structural constraints and functional layout coordination of modular pre-set node boards, which facilitates integrated installation and subsequent expansion.

[0014] 2. This invention collects and encapsulates industrial field signals through a signal acquisition module and an edge processing module, forming an uplink data stream. This enables the collected data to be output in a unified frame format and sent to the application layer, facilitating parsing, storage, and management at the application layer.

[0015] 3. This invention implements a primary / backup bearer strategy based on link status parameters through a link management module. When the Ethernet link is unavailable, it switches to a 4G / 5G cellular link to carry uplink data streams, thereby improving the uplink transmission availability and continuity of the system under different network conditions. Attached Figure Description

[0016] Figure 1 This is an architectural diagram of an industrial wireless signal transmission system according to the present invention. Detailed Implementation

[0017] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see the appendix Figure 1 This invention provides an industrial wireless signal transmission system, comprising:

[0019] The signal acquisition module is used to acquire signals from the industrial field and output acquired data frames;

[0020] An edge processing module is used to encapsulate the acquired data frames and output an uplink data stream;

[0021] The bearer communication module is used to send the uplink data stream to the application layer. The bearer communication module includes an Ethernet communication interface and a cellular communication interface.

[0022] The link management module is used to obtain the link status parameters of the Ethernet communication interface and the cellular communication interface, and when the link status of the Ethernet communication interface does not meet the preset transmission conditions, switch the transmission path of the uplink data stream from the Ethernet communication interface to the cellular communication interface.

[0023] A modular pre-installed node board is used to carry the signal acquisition module, the edge processing module, the bearer communication module and the link management module. The modular pre-installed node board is equipped with a standardized installation interface and is divided into an acquisition and processing layout area and a bearer communication layout area, as well as a physical isolation slot located between the acquisition and processing layout area and the bearer communication layout area.

[0024] The modular prefabricated node plate has a biomimetic skeletal support frame. The shape distribution of the biomimetic skeletal support frame is determined by a variable density topology optimization calculation for the design domain of the modular prefabricated node plate. The support path of the biomimetic skeletal support frame is constrained by the geometric boundary constraints formed by the physical isolation groove within the design domain.

[0025] Specifically, the signal acquisition module collects signals from the industrial site and forms acquisition data frames. The edge processing module encapsulates the acquisition data frames and forms an uplink data stream. The link management module obtains the link status parameters of the Ethernet communication interface and the cellular communication interface, and selects whether to send the uplink data stream to the application layer via the bearer communication module through the Ethernet communication interface or the cellular communication interface (4G / 5G). The above functional modules are integrated and installed on a modular pre-installed node board. The node board is equipped with standardized installation interfaces and divided into an acquisition and processing layout area and a bearer communication layout area. A physical isolation slot is set between the two layout areas to form a physical isolation boundary. A finite element model is established with the node board design domain as the object and variable density topology optimization calculation is performed. The density distribution result is output and the bearing skeleton of the node board is determined accordingly. The node board forms a biomimetic skeleton structure consisting of a main bearing area, a weight reduction area, and a bearing skeleton. The area corresponding to the physical isolation slot is used as a design constraint to participate in the determination of the bearing skeleton. Thus, the system's acquisition, encapsulation, and multi-link uplink transmission are realized under the premise of meeting the installation and layout constraints.

[0026] Optionally, the variable density topology optimization calculation method may include:

[0027] A finite element model of the design domain is established based on the design domain of the modular pre-installed node plate, and boundary constraints and load conditions are set in the finite element model of the design domain.

[0028] Using the element density of the finite element model in the design domain as the design variable, an optimization model is constructed with the goal of minimizing structural flexibility and the constraint of material volume fraction. The region corresponding to the physical isolation groove is set as the non-design domain.

[0029] The optimization model is iteratively solved to output the density distribution results, and the biomimetic skeletal support frame is determined based on the density distribution results.

[0030] Specifically, the design domain for topology optimization can be determined for modular pre-built node boards. In this design domain, a finite element model is established. During the establishment process, displacement constraints are set at the standardized installation interface as the boundary constraint position. At the same time, load conditions are set in combination with the weight of the signal acquisition module, edge processing module, bearing communication module and link management module installed on the node plate and the working conditions such as cable traction. In this way, a finite element model that can be used for subsequent optimization solution is obtained, so as to realize the computational expression of the node plate geometry, fixing method and stress conditions.

[0031] When constructing the optimization model, the element density of the finite element model of the design domain can be used as the design variable to establish a variable density topology optimization model with the objective of minimizing structural flexibility and the constraint of material volume fraction. To ensure that the physical isolation trench remains a pre-defined structure during the optimization process, the design domain is divided into a designable domain and a non-designable domain. And satisfy:

[0032] ;

[0033] The area corresponding to the physical isolation trench Simultaneously, a mask function is introduced to characterize whether a position belongs to the designable domain: when ,then The final density field is expressed as:

[0034] ;

[0035] in, To design the location coordinates within the domain, For the element density variable within the designable domain, The fixed density value is used to set the area corresponding to the physical isolation groove as the non-design domain. For example, when the physical isolation groove is a slotted structure, the area corresponding to the slot is included and taken to keep the area as a cavity. When the physical isolation groove is an isolation strip structure and is required to be non-perforated and non-thinned, the area corresponding to the isolation strip is included and taken to keep the area as a solid material distribution, so that the physical isolation groove participates in the optimization model as a structural constraint.

[0036] Based on this, the optimization model is solved iteratively and the density distribution results are output. The biomimetic skeletal support skeleton is determined based on the density distribution results. Specifically, by iteratively updating the unit density variables within the designable domain, the density distribution forms a support path distribution under the premise of satisfying the volume fraction constraint. Then, the region in the density distribution results that meets the preset threshold condition is used as the basis for forming the support skeleton and a node plate support skeleton is generated, thereby completing the process of converting the variable density topology optimization calculation results into a node plate support skeleton structure.

[0037] Optionally, determining the biomimetic skeletal support frame based on the density distribution results may include:

[0038] Threshold determination is performed on the density distribution results, and regions with a density not less than a preset threshold are selected as candidate skeleton regions.

[0039] Extract skeleton boundaries and generate skeleton contours based on skeleton candidate regions.

[0040] The outline of the skeleton is smoothed to form the physical boundary of the biomimetic skeletal support skeleton.

[0041] Specifically, after obtaining the density distribution results of the modular pre-set node board, a threshold determination process can be performed on the density distribution results to convert the density field into candidate regions for skeleton geometry generation. Specifically, a preset threshold is set. The regions that meet the threshold conditions are selected as candidate skeleton regions, which can be expressed as:

[0042] ;

[0043] in, Design domain for modular pre-built node boards. To design the location coordinates within the domain, The density value corresponds to the density distribution result. For the preset threshold, As a candidate region for the skeleton, the continuous density distribution result can be transformed into a discrete set of candidate bearing paths by threshold determination, which facilitates subsequent boundary extraction and shaping;

[0044] Determining candidate skeleton regions Then, skeleton boundaries can be extracted and skeleton contours generated based on the skeleton candidate regions. For example, the skeleton contours can be extracted from the candidate regions. The outer boundary is contour extracted to obtain a set of closed or semi-closed boundary curves, which are then mapped to the geometric shape of the node plate load-bearing skeleton. For example, when the node plate has two standardized installation interface fixing points in the main load-bearing area and the area corresponding to the physical isolation groove is not the design domain, the candidate skeleton area... Typically, a high-density path is formed between two fixed points, and branches or widened areas are formed near the fixed points. The skeleton outline obtained after boundary extraction reflects the main load-bearing path connecting the fixed points and its branch morphology, thus providing the outline basis for the geometric generation of the biomimetic skeletal skeleton structure.

[0045] After obtaining the skeleton outline, the skeleton outline can be smoothed to form the physical boundary of the biomimetic skeletal load-bearing skeleton. For example, sharp corners and serrated boundaries in the skeleton outline can be rounded, and transition corrections can be made at the locations of sudden changes in local curvature, so that the skeleton outline forms a continuous and smooth boundary line. Then, the solid structure model of the load-bearing skeleton is generated based on the smoothed boundary line. Through smoothing, the skeleton outline obtained by threshold judgment and boundary extraction can meet the geometric requirements of structural forming and assembly layout, thereby obtaining a load-bearing skeleton structure for modular pre-set node plates.

[0046] Optionally, in some examples, variable density topology optimization calculations may also include setting manufacturing constraints on the optimization model, which may include:

[0047] Set the minimum feature size parameters of the biomimetic skeletal support frame;

[0048] During the iterative update of the unit density, the density distribution results are filtered to ensure that the density distribution results meet the minimum feature size parameter.

[0049] Specifically, after constructing the optimization model, the variable density topology optimization calculation also sets manufacturing constraints on the optimization model to ensure that the load-bearing skeleton generated from the density distribution results meets the predetermined processing and forming requirements. Specifically, before or during the iterative solution, the minimum characteristic size parameter of the biomimetic skeleton load-bearing skeleton is preset to limit the minimum scale of the skeleton beam width, hole size or local slender structure, thereby constraining the scale of the generated structure in the optimization solution stage. For example, if the node plate adopts plate cutting or stamping forming process, the minimum characteristic size parameter can be set to a value corresponding to the tool diameter, punching capacity or minimum machinable rib width to ensure that the subsequently generated skeleton structure can be processed and realized.

[0050] To ensure that the density distribution results meet the minimum feature size parameter, the density distribution results are filtered during the iterative update of the unit density. That is, after each round of density update, the unit density field is spatially smoothed and scaled to keep the density change continuous within the spatial range corresponding to the minimum feature size parameter.

[0051] Optionally, in some examples, the physical isolation groove is a slotted structure or an isolation strip structure. The physical isolation groove extends along the boundary between the acquisition and processing area and the carrier communication area. The area corresponding to the physical isolation groove is defined in the design domain as a non-thinning area and a non-perforated area, so as to serve as the cut-off boundary of the biomimetic skeleton on the mechanical transmission path.

[0052] Specifically, the modular pre-installed node board is divided into a data acquisition and processing area and a communication carrying area. To achieve physical isolation between the two areas at the structural level, a physical isolation groove is set at the boundary between the two areas. The physical isolation groove can be a slotted structure that extends continuously along the boundary or an isolation strip structure that extends continuously along the boundary. The slotted structure can be achieved by forming a through or non-through narrow slot on the node board. The isolation strip structure can be achieved by forming a continuous solid strip area on the node board. The length direction of the physical isolation groove is consistent with the boundary direction of the two areas, thereby forming a clear boundary on the node board to limit the structural continuity and layout span between the two areas.

[0053] To ensure that the physical isolation slot remains a pre-defined structure during subsequent variable density topology optimization calculations and load-bearing skeleton generation, the area corresponding to the physical isolation slot is defined as a non-thinning and non-perforated area. In the topology optimization design domain, the area corresponding to the physical isolation slot is set as a non-design domain, so that the area does not participate in the iterative update of the element density and remains as a pre-defined structural property, thereby fixing the shape and position of the physical isolation slot in the node plate structure.

[0054] For example, when the carrier communication area is concentrated with Ethernet communication interfaces and cellular communication interfaces, and the acquisition and processing area is used to arrange signal acquisition and edge processing circuits, an isolation strip structure can be set along the boundary between the two areas, and the area corresponding to the isolation strip can be fixed as a solid strip area as a non-design domain. In the subsequent iterative solution and skeleton extraction process, the carrier skeleton only forms the carrier path within the design domain, and the area corresponding to the isolation strip maintains a continuous solid structure, thereby meeting the pre-set requirement that the physical isolation groove "cannot be thinned and cannot be perforated".

[0055] Optionally, in some examples, the standardized mounting interface includes a hole array interface and a positioning surface interface, the hole array interface being used for bolt mounting and the positioning surface interface being used for positioning and mating with the industrial field mounting base.

[0056] Specifically, the modular prefabricated node plate is equipped with standardized installation interfaces, including a hole array interface and a positioning surface interface. The hole array interface is achieved by forming multiple mounting holes arranged at preset intervals in the main load-bearing area of ​​the node plate. The mounting holes are used to cooperate with bolts to fix the node plate to the industrial site mounting base. The positioning surface interface is achieved by forming a plane, stepped surface or mutually perpendicular reference surface for fitting on the edge of the node plate or in the main load-bearing area. The positioning surface interface cooperates with the corresponding positioning surface on the mounting base to define the installation posture and installation position of the node plate, thereby providing a positioning reference before bolt tightening and maintaining the relative positional relationship of the node plate after tightening.

[0057] For example, when the industrial site mounting base is a guide rail bracket or a mounting plate inside a cabinet, the mounting holes of the hole array interface can be aligned with the threaded holes or through holes on the mounting base, and quick fixing can be achieved by bolts. The positioning surface interface can use the straight reference surface of the node plate edge to fit with the edge surface of the mounting base, or use the stepped surface on the node plate to cooperate with the positioning boss of the mounting base, so as to realize the alignment and resetting of the node plate during the installation process, thereby facilitating the assembly, replacement and maintenance of modular pre-installed node plates.

[0058] Optionally, in some examples, the link management module executes a primary / backup bearer strategy for the uplink data stream based on link state parameters:

[0059] The uplink data stream is sent via the Ethernet communication interface as the main link carrier;

[0060] When the link status parameters of the Ethernet communication interface meet the preset switching conditions, the uplink data stream is switched to be sent via the cellular communication interface as a backup link bearer; wherein, the preset transmission conditions include the real-time packet loss rate of the Ethernet communication interface being greater than a preset threshold, or the physical link connection of the Ethernet communication interface being interrupted.

[0061] Specifically, the link management module continuously acquires the link status parameters of the Ethernet communication interface and the cellular communication interface, and executes a primary and backup bearer strategy on the uplink data stream output by the edge processing module accordingly. The link status parameters can be obtained from the interface driver, network protocol stack, or reported by the communication module, and represent whether the link is in an available state and its communication quality. Under normal conditions, the link management module controls the bearer communication module to send the uplink data stream through the Ethernet communication interface, so that the Ethernet communication interface is used as the primary link bearer to meet the common fixed network access methods in industrial sites.

[0062] In one specific implementation, the link management module determines whether the preset switching conditions are met based on the link status parameters of the Ethernet communication interface. When the preset switching conditions are met, the link management module outputs a switching control command, causing the bearer communication module to switch the uplink data stream bearer path from the Ethernet communication interface to the cellular communication interface, so that the cellular communication interface serves as the backup link bearer. The preset switching conditions can be determined by comparing the link status parameters with a preset threshold, such as when the link connectivity status changes from "connected" to "disconnected", or when the number of consecutive transmission failures reaches a threshold within a preset time window, thereby triggering the switching process.

[0063] When industrial field devices access the factory switch via Ethernet and report data to the application layer server, the link management module defaults to selecting the Ethernet communication interface as the main link. When the switch is powered off or the network cable is loose, causing the Ethernet link status parameter to indicate that the link is disconnected, the link management module determines that the preset switching conditions are met and controls the switch to the cellular communication interface. The uplink data stream is then carried through the 4G or 5G network and sent to the application layer, thus maintaining the availability of the uplink transmission path when Ethernet is unavailable.

[0064] Optionally, in some examples, the edge processing module encapsulates the acquired data frames and outputs the uplink data stream, including:

[0065] Add a source identifier field and a sequence number field to the acquired data frames;

[0066] The acquired data frame with the source identifier field and the sequence number field added is written into the uplink queue;

[0067] Output the upstream data stream in the order it is dequeued from the upstream queue.

[0068] Specifically, after receiving the acquisition data frame output by the signal acquisition module, the edge processing module encapsulates the acquisition data frame. During encapsulation, a source identifier field and a sequence number field are added to the acquisition data frame. The source identifier field is used to identify the acquisition source corresponding to the acquisition data frame, and the sequence number field is used to identify the order of the acquisition data frames in the continuous output process. The source identifier field can be generated by the device number, acquisition channel number, or preset node identifier, and the sequence number field can be generated by an incrementing counter maintained by the edge processing module, so that each acquisition data frame has distinguishable source information and order information.

[0069] In one specific implementation, the acquired data frame with the source identifier field and the sequence number field added is written into the uplink queue. The uplink queue is used to temporarily store data frames to be sent and maintain the queuing order of the data frames. The uplink queue can be implemented using a first-in-first-out queue structure. The write operation of the queue is triggered by the edge processing module after encapsulation. By writing to the uplink queue, the subsequent transmission process of the communication module can be decoupled from the acquisition process, which facilitates the orderly caching and scheduling of data to be sent when the link status changes or the transmission rate is limited.

[0070] In one specific implementation, the edge processing module outputs the uplink data stream according to the dequeue order of the uplink queue. That is, it sequentially reads the data frames in the uplink queue and outputs them as a continuous data stream for the bearer communication module to send. During the output process, the dequeue order of the queue remains unchanged, so that the order of each data frame in the uplink data stream is consistent with the sequence number field. For example, when a node collects two sensor signals at a fixed period and forms a collection data frame, the edge processing module adds the same source identifier field to each frame and assigns the sequence number field to 1, 2, 3, ..., and then writes them into the uplink queue in sequence. Subsequently, it outputs the uplink data stream according to the dequeue order of the queue, so that the bearer communication module can send the data in sequence and use the source identifier field and sequence number field to identify the data ownership and order at the application layer.

[0071] The bearer communication module sends the uplink data stream to the application layer by encapsulating the uplink data stream into an application layer transmission message and carrying a source identifier field and a sequence number field in the application layer transmission message.

[0072] Specifically, after receiving the uplink data stream output by the edge processing module, the bearer communication module encapsulates the uplink data stream into an application layer transmission message and writes the uplink data stream as the message payload. At the same time, the application layer transmission message carries a source identifier field and a sequence number field. The source identifier field is used to identify the collection source corresponding to the message, and the sequence number field is used to identify the order of the message in the continuous transmission process. For example, when a node continuously outputs collection data frames and writes them into the uplink queue by the edge processing module, the bearer communication module generates a corresponding application layer transmission message for each frame according to the queue dequeue order. The message carries the same source identifier field and an incrementing sequence number field (such as 201, 202, 203), and is sent to the application layer through the Ethernet communication interface or the cellular communication interface, so that the application layer receiver can identify the source and mark the order of the received data based on the source identifier field and the sequence number field.

[0073] Optionally, in some examples, the modular pre-installed node board is provided with a group of module mounting holes and an electrical connection interface. The signal acquisition module, edge processing module, bearer communication module and link management module are fixed to the modular pre-installed node board through the corresponding group of module mounting holes and electrically connected through the electrical connection interface for modular replacement.

[0074] Specifically, the modular pre-installed node board is pre-set with module mounting hole groups and electrical connection interface positions. The module mounting hole groups are pre-arranged according to the external dimensions and installation requirements of the signal acquisition module, edge processing module, bearer communication module, and link management module, and are used to provide mechanical fixing positions for each module. The electrical connection interface positions are pre-arranged according to the power and data signal interface forms of each module, and are used to provide pluggable electrical connection interfaces between each module and the node board. Through the configuration of these pre-set hole and interface positions, the node board can achieve standardized positioning and installation of each functional module during assembly.

[0075] The signal acquisition module, edge processing module, bearer communication module, and link management module are respectively aligned with the module mounting hole group on the node board and fixedly installed with fasteners. After installation, each module is electrically connected to the node board through the corresponding electrical connection interface, so that the acquired data frames, uplink data streams, and link control related signals can be transmitted between modules according to the system process. This arrangement forms a preset relationship between the installation position of each module and the electrical connection path, which facilitates consistent assembly.

[0076] To illustrate, when it is necessary to replace the carrier communication module on site to adapt to different communication standards or to maintain a faulty module, the electrical connection interface corresponding to the module can be disconnected first and the fasteners of the corresponding module mounting hole group can be removed. Then, the replacement module can be fixed according to the same hole group and plugged into the same electrical connection interface to complete the electrical connection. In this way, modular replacement and restoration of operation can be achieved without changing the main structure of the node board and the installation status of other modules.

[0077] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An industrial wireless signal transmission system, characterized in that, include: The signal acquisition module is used to acquire signals from the industrial field and output acquired data frames; An edge processing module is used to encapsulate the acquired data frames and output an uplink data stream; The bearer communication module is used to send the uplink data stream to the application layer. The bearer communication module includes an Ethernet communication interface and a cellular communication interface. The link management module is used to obtain the link status parameters of the Ethernet communication interface and the cellular communication interface, and when the link status of the Ethernet communication interface does not meet the preset transmission conditions, switch the transmission path of the uplink data stream from the Ethernet communication interface to the cellular communication interface. A modular pre-installed node board is used to carry the signal acquisition module, the edge processing module, the bearer communication module and the link management module. The modular pre-installed node board is equipped with a standardized installation interface and is divided into an acquisition and processing layout area and a bearer communication layout area, as well as a physical isolation slot located between the acquisition and processing layout area and the bearer communication layout area. The modular prefabricated node plate has a biomimetic skeletal support frame. The shape distribution of the biomimetic skeletal support frame is determined by a variable density topology optimization calculation for the design domain of the modular prefabricated node plate. The support path of the biomimetic skeletal support frame is constrained by the geometric boundary constraints formed by the physical isolation groove within the design domain.

2. The industrial wireless signal transmission system according to claim 1, characterized in that, The variable density topology optimization calculation method includes: A design domain finite element model is established based on the design domain of the modular pre-set node plate, and boundary constraints and load conditions are set in the design domain finite element model. Using the element density of the finite element model of the design domain as the design variable, an optimization model is constructed with the goal of minimizing structural flexibility and the constraint of material volume fraction, and the region corresponding to the physical isolation groove is set as the non-design domain. The optimization model is iteratively solved to output the density distribution result, and the biomimetic skeletal support frame is determined based on the density distribution result.

3. The industrial wireless signal transmission system according to claim 2, characterized in that, Determining the biomimetic skeletal support frame based on the density distribution results includes: The density distribution results are thresholded, and regions with a density not less than a preset threshold are selected as skeleton candidate regions. Based on the skeleton candidate region, the skeleton boundary is extracted and the skeleton outline is generated. The outline of the skeleton is smoothed to form the physical boundary of the biomimetic skeletal support skeleton.

4. An industrial wireless signal transmission system according to claim 2, characterized in that, The variable density topology optimization calculation also includes setting manufacturing constraints on the optimization model, the manufacturing constraints including: Set the minimum feature size parameters of the biomimetic skeletal support frame; During the iterative update of the unit density, the density distribution result is filtered to ensure that the density distribution result satisfies the minimum feature size parameter.

5. An industrial wireless signal transmission system according to claim 1, characterized in that, The physical isolation groove is a slotted structure or an isolation strip structure. The physical isolation groove extends along the boundary between the acquisition and processing area and the carrier communication area. The area corresponding to the physical isolation groove is defined in the design domain as a non-thinning area and a non-perforated area, so as to serve as the cut-off boundary of the biomimetic skeleton-type carrier frame on the mechanical transmission path.

6. An industrial wireless signal transmission system according to claim 1, characterized in that, The standardized installation interface includes a hole array interface and a positioning surface interface. The hole array interface is used for bolt installation, and the positioning surface interface is used for positioning and mating with the industrial site installation base.

7. An industrial wireless signal transmission system according to claim 1, characterized in that, The link management module executes a primary / backup bearer strategy on the uplink data stream based on the link status parameters. The uplink data stream is transmitted through the Ethernet communication interface as the main link bearer; When the link status parameters of the Ethernet communication interface meet the preset switching conditions, the uplink data stream is switched to be sent via the cellular communication interface as a backup link bearer; wherein, the preset transmission conditions include the real-time packet loss rate of the Ethernet communication interface being greater than a preset threshold, or the physical link connection of the Ethernet communication interface being interrupted.

8. An industrial wireless signal transmission system according to claim 1, characterized in that, The edge processing module encapsulates the acquired data frames and outputs the uplink data stream, including: Add a source identifier field and a sequence number field to the acquired data frame; The acquired data frame with the source identifier field and the sequence number field added is written into the uplink queue; The upstream data stream is output according to the dequeue order of the upstream queue.

9. An industrial wireless signal transmission system according to claim 8, characterized in that, The bearer communication module sends the uplink data stream to the application layer by: encapsulating the uplink data stream into an application layer transmission message, and carrying the source identifier field and the sequence number field in the application layer transmission message for the application layer to perform data tracing and reassembly.

10. An industrial wireless signal transmission system according to any one of claims 1 to 8, characterized in that, The modular pre-installed node board is provided with a group of module mounting holes and an electrical connection interface. The signal acquisition module, the edge processing module, the bearer communication module and the link management module are respectively fixed to the modular pre-installed node board through the corresponding group of module mounting holes and electrically connected through the electrical connection interface for modular replacement.

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