Beidou monitoring terminal for agricultural machinery operations

Abstract

This utility model discloses a Beidou monitoring terminal for agricultural machinery operations, belonging to the field of agricultural intelligent equipment technology. It includes an upper shell, a lower shell, a sealing ring, an interface assembly, and a circuit module. The frame-type sealing ring forms a composite seal through radial nesting between a first protruding frame and the inner wall of the upper shell, and a second protruding frame and the inner wall of the sealing ring, combined with axial compression between the end face of the upper shell and the first platform of the sealing ring, and the second platform of the lower shell and the bottom surface of the sealing ring. The lower shell features a dual mounting structure with a bottom internal thread mounting hole and an extension edge fixing through hole. The circuit module integrates Beidou positioning, data communication, and a main control unit, and is modularly connected. This terminal improves sealing reliability in humid, dusty, and high-frequency vibration environments, enhances installation adaptability for various agricultural machinery scenarios, ensures stable interface connections and data transmission, and achieves functional synergy. It is suitable for intelligent scenarios such as automatic navigation and operation monitoring of agricultural machinery, providing support for precision agricultural production.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural intelligent equipment technology, specifically relating to a Beidou monitoring terminal for agricultural machinery operation monitoring and intelligent control. Background Technology

[0002] In the current era of rapid advancements in agricultural intelligence, agricultural machinery operation terminals, as key devices for achieving agricultural machinery positioning and tracking, data monitoring, and remote control, directly impact the improvement of agricultural production efficiency through their stability and reliability. However, existing agricultural machinery operation terminals still face numerous practical problems when applied in complex field operating environments, making it difficult to meet the demands for efficient and stable operations.

[0003] Agricultural machinery operating environments are often characterized by continuous vibration, humidity, and dust, highlighting the significant shortcomings in the sealing structure design of existing terminals. Most terminals employ traditional flat sealing rings, achieving sealing solely through axial compression. This structure is poorly adapted to vibrations during operation and minor deformations of the casing, easily leading to radial gaps on the sealing surface. Dew, rainwater, dust, and straw debris from the field can easily seep into the terminal through these gaps, causing short circuits, module damage, and other malfunctions, severely shortening the equipment's lifespan and increasing maintenance costs.

[0004] Regarding installation and compatibility, existing terminals have a relatively simple structural design, with installation methods mostly limited to direct screw connections and other fixing methods. However, different types of agricultural machinery (such as tractors, harvesters, and seeders) have significantly different deployment scenarios, with varying structures for the cab, frame, and cantilever. Existing terminals are difficult to directly adapt to these diverse scenarios, often requiring additional structural modifications to complete the installation. This not only increases usage costs but may also affect the installation stability of the terminal due to improper modifications, thereby impacting equipment performance.

[0005] The stability of interface connections is another crucial guarantee for the normal operation of the terminal, but existing terminals also have shortcomings in this area. The functional interfaces of most terminals (such as power interfaces, positioning interfaces, camera interfaces, etc.) are scattered, distributed on different sides of the terminal. In actual use, this easily leads to cable tangling, causing inconvenience for installation and maintenance. More importantly, these interfaces mostly use snap-fit ​​or plug-in connections. Under the high-frequency vibration environment of agricultural machinery operation, the connection points are prone to loosening or even detachment, resulting in signal transmission interruption and affecting the continuity of positioning tracking, data monitoring, and remote control.

[0006] In addition, the lack of coordination among the functional modules of existing terminals is also an important factor restricting their intelligent applications. The functional modules integrated in the terminal, such as Beidou positioning, image acquisition, and data communication, often operate independently, lacking an effective data fusion and linkage control mechanism. Data such as positioning information, operation images, and device status cannot be integrated and processed in real time, making it difficult to support intelligent requirements such as automatic navigation of agricultural machinery, tracing of operation trajectories, and precise operation monitoring, thus limiting the process of upgrading agricultural production towards precision and intelligence.

[0007] Therefore, aiming at the problems existing in the existing agricultural machinery operation terminals in terms of sealing protection, installation adaptation, interface stability, and functional coordination, developing an agricultural machinery operation Beidou monitoring terminal with a more reasonable structure and more reliable performance has become an urgent need in the field of current agricultural intelligent equipment. Summary of the Invention

[0008] In view of this, the present utility model aims to overcome the deficiencies of the prior art and provides an agricultural machinery operation Beidou monitoring terminal for agricultural machinery operation monitoring and intelligent control. The aim is to improve the sealing reliability of the terminal in the humid and dusty field environment with high-frequency vibration by optimizing the sealing structure design, improving the installation adaptation method, optimizing the interface layout, and strengthening the coordination of functional modules, enhance the installation adaptability to different agricultural machinery deployment scenarios, ensure the stability of interface connection and the continuity of data transmission, achieve the efficient coordination of functions such as Beidou positioning, image acquisition, and data communication, and thereby improve the overall performance and service life of the terminal, meet the actual needs of agricultural machinery operation monitoring and intelligent control, and support the precision and intelligent upgrade of agricultural production.

[0009] To achieve the above object, the present utility model provides an agricultural machinery operation Beidou monitoring terminal, which includes an upper housing, a lower housing, a sealing ring, an interface component, and a circuit module; the upper housing and the lower housing are hermetically connected through the sealing ring, and the sealing ring forms a radial nested fit and an axial extrusion seal with the upper housing and the lower housing respectively; the interface components are centrally arranged on the same side of the terminal, and the bottom of the lower housing is provided with a mounting hole with internal threads for adapting to a mounting bracket; the circuit module integrates a Beidou positioning module, a data communication module, and a main control unit, and the circuit module is arranged in the accommodation cavity of the upper housing;

[0010] The sealing ring is of a frame structure, including a first raised border, a first table surface for receiving the end face of the upper housing, and a bottom surface for receiving the end face of the lower housing; in the installed state, the first raised border enters the interior of the upper housing, and the side wall of the first raised border is closely adhered to the inner wall at the port of the upper housing to form a radial seal; the end face of the upper housing is flatly arranged and presses against the first table surface of the sealing ring during assembly to form an axial seal;

[0011] The end face of the lower housing is provided with a stepped structure, including a second raised frame and a second platform. In the installed state, the second raised frame enters the inner side of the sealing ring, and the side wall of the second raised frame is tightly fitted with the inner side of the sealing ring to form a radial seal; the second platform of the lower housing abuts against the bottom surface of the sealing ring to form an axial seal.

[0012] Furthermore, the upper housing and the lower housing are fixedly connected by fasteners. The lower housing has circumferentially distributed fixing through holes on the outer side of the trapezoidal structure. The fasteners pass through the fixing through holes and are screwed to the upper housing, so that the upper housing and the lower housing press the sealing ring together.

[0013] Furthermore, the interface component includes four main interfaces and one positioning antenna interface. The main interfaces are a power interface, an RS232 serial port interface, a front camera interface, and a rear camera interface, respectively. All interfaces are arranged along the same horizontal line on the side of the terminal.

[0014] Furthermore, the outer wall of the interface component is provided with external threads, and the interface is equipped with a locking nut with internal threads. After the cable connector is inserted into the interface, it is fixed by screwing the locking nut into the interface.

[0015] Furthermore, the upper housing has a supporting rib extending along the inner wall inside the cavity, the circuit module is fixed to the supporting rib by bolts, and a heat dissipation gap of 1-5mm is left between the circuit module and the inner wall of the upper housing.

[0016] Furthermore, the BeiDou positioning module, data communication module, and main control unit of the circuit module are electrically connected using a flexible flat cable.

[0017] Furthermore, the outer surface of the upper housing is provided with an array of status indicator lights corresponding to the interface components, including a power indicator light, a running status indicator light, a positioning indicator light, a communication indicator light, a serial port indicator light, and a camera interface indicator light. The on / off state of each indicator light corresponds to the working state of the interface.

[0018] Furthermore, the sealing ring is integrally molded from silicone rubber material with a Shore hardness of 60-70 degrees, the height of the first raised frame is 3-5mm, and the vertical distance between the first platform and the bottom surface is 4-6mm, which is adapted to the closing height of the upper and lower shells.

[0019] Furthermore, the lower housing is provided with an outwardly extending edge, and a fixing through hole is provided on the extending edge; the fixing through hole is used to fix the entire agricultural machinery operation Beidou monitoring terminal in a preset position by fasteners.

[0020] The present invention, by adopting the above technical solution, has at least the following beneficial effects:

[0021] In this invention, the composite structure of "radial nesting and axial compression sealing" formed by the frame-type sealing ring, the upper shell, and the lower shell solves the problem of gaps easily appearing in traditional planar seals under agricultural machinery vibration and shell deformation. It effectively blocks the intrusion path of water and dust, significantly improves the sealing reliability of the terminal in humid and dusty field environments, reduces the risk of circuit failure, and extends the service life of the equipment.

[0022] In this utility model, the internal threaded mounting hole at the bottom of the lower housing is combined with the outwardly extending edge fixing through hole to form a multi-adaptive mounting structure. It can be directly adapted to various mounting methods such as suction cup brackets, metal rod clamps, and screw fixing. It can meet the diverse deployment scenarios of different agricultural machinery cabs and frames such as tractors and harvesters without additional modifications, reducing installation costs and improving adaptability flexibility.

[0023] In this invention, the interface components are centrally arranged on one side to avoid cable tangling, and the threaded locking structure effectively prevents the connection from loosening in high-frequency vibration environments, ensuring stable signal transmission. At the same time, the circuit module integrates Beidou positioning, data communication and main control unit, and realizes real-time fusion and uploading of positioning and image data through modular collaboration, supporting the intelligent operation needs of agricultural machinery such as automatic navigation and precision monitoring, and promoting the precision upgrade of agricultural production. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is one of the schematic diagrams of the overall structure of the Beidou monitoring terminal for agricultural machinery operations of this utility model;

[0026] Figure 2 This is the second schematic diagram of the overall structure of the Beidou monitoring terminal for agricultural machinery operations of this utility model;

[0027] Figure 3 This is a schematic diagram of the overall exploded structure of the Beidou monitoring terminal for agricultural machinery operations of this utility model;

[0028] Figure 4 yes Figure 3 A partial schematic diagram.

[0029] In the diagram: 1. Upper housing; 2. Lower housing; 3. Sealing ring; 4. First raised frame; 5. First platform; 6. Circuit module; 7. Second raised frame; 8. Second platform; 9. Extension edge; 10. Fixing through hole; 11. Power interface; 12. RS232 serial port interface; 13. Front camera data interface; 14. Rear camera data interface; 15. Positioning antenna interface; 16. Indicator light; 17. Mounting hole with internal thread. Detailed Implementation

[0030] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this invention as detailed in the appended claims.

[0031] like Figures 1 to 4 As shown, this embodiment provides a Beidou monitoring terminal for agricultural machinery operations, including an upper housing 1, a lower housing 2, a sealing ring 3, an interface assembly, and a circuit module 6. The upper housing 1 and the lower housing 2 are sealed together by the sealing ring 3, which forms a radial nesting fit and an axial compression seal with the upper housing 1 and the lower housing 2, respectively. The interface assembly is centrally arranged on the same side of the terminal. The bottom of the lower housing 2 is provided with a mounting hole 17 with internal threads for fitting a mounting bracket. The circuit module 6 integrates a Beidou positioning module, a data communication module, and a main control unit, and is located within the accommodating cavity of the upper housing 1.

[0032] The sealing ring 3 has a frame structure, including a first raised frame 4, a first platform 5 for receiving the end face of the upper housing 1, and a bottom surface for receiving the end face of the lower housing 2. In the installed state, the first raised frame 4 enters the interior of the upper housing 1, and the side wall of the first raised frame 4 is tightly fitted with the inner wall at the port of the upper housing 1 to form a radial seal. The end face of the upper housing 1 is flat and presses against the first platform 5 of the sealing ring 3 during assembly to form an axial seal.

[0033] The end face of the lower housing 2 is provided with a stepped structure, including a second raised frame 7 and a second platform 8. In the installed state, the second raised frame 7 enters the inner side of the sealing ring 3, and the side wall of the second raised frame 7 is tightly fitted with the inner side of the sealing ring 3 to form a radial seal; the second platform 8 of the lower housing 2 abuts against the bottom surface of the sealing ring 3 to form an axial seal.

[0034] In one embodiment, the upper housing 1 and the lower housing 2 are fixedly connected by fasteners. The lower housing 2 has circumferentially distributed fixing holes on its outer side of the trapezoidal structure. The fasteners pass through the fixing holes and are screwed onto the upper housing 1, so that the upper housing 1 and the lower housing 2 press the sealing ring 3 together. The evenly distributed fixing holes along the circumference ensure that the fasteners are subjected to balanced force, avoid local gaps when the upper housing 1 and the lower housing 2 are closed, further enhance the radial nesting and axial compression effect of the sealing ring 3, and ensure the stability of the sealing structure under long-term vibration environment.

[0035] In one implementation, the interface component in this embodiment includes four main interfaces and one positioning antenna interface 15. The main interfaces are a power interface 11, an RS232 serial port interface 12, a front camera interface 13, and a rear camera interface 14, all arranged along the same horizontal line on the side of the terminal. This single-sided, centralized, and horizontally arranged interface layout reduces cable tangling and facilitates wiring management within the agricultural machinery cab. The clearly categorized interface types can adapt to different functional modules. The power interface 11 provides stable power supply, the serial port interface 12 supports device debugging and data interaction, and the camera data interface can connect to both front and rear cameras to achieve image acquisition of the operational scene.

[0036] In one implementation, the outer wall of the interface assembly in this embodiment is provided with external threads, and the interface is equipped with a locking nut with internal threads. After the cable connector is inserted into the interface, it is fixed by screwing the locking nut into the interface. The threaded locking structure replaces the traditional snap-fit ​​or plug-in connection. The axial preload generated by the screw connection offsets the risk of loosening caused by agricultural machinery vibration. Combined with the tight fit between the interface and the cable connector, it can simultaneously improve the connection stability and sealing performance, preventing dust from entering from the interface gaps.

[0037] In one embodiment, the upper housing 1 has a supporting rib extending along its inner wall within its accommodating cavity. The circuit module 6 is fixed to the supporting rib by bolts, and a 1-5mm heat dissipation gap is left between the circuit module 6 and the inner wall of the upper housing 1. The supporting rib provides rigid fixation for the circuit module 6, reducing the impact of vibration on the module's solder joints, and also achieves physical isolation between the circuit module 6 and the housing through structural scaffolding. The reserved heat dissipation gap can form an air convection channel, which, combined with the metal material of the upper housing 1, quickly dissipates the module's operating heat, avoiding performance degradation caused by high temperatures.

[0038] In one implementation, the BeiDou positioning module, data communication module, and main control unit of circuit module 6 in this embodiment are connected via a flexible flat cable. The flexible flat cable connection method is characterized by convenient plugging and unplugging and reliable contact, facilitating module assembly, maintenance, and replacement. The modular connection structure allows each functional module to work independently yet collaboratively. The main control unit can acquire BeiDou positioning data in real time and control the communication module to synchronously upload positioning information and image data.

[0039] In one implementation, the outer surface of the upper housing 1 in this embodiment is provided with an array of status indicator lights corresponding to the interface components. The indicator lights 16 include a power indicator light, a positioning indicator light, a communication indicator light, and a camera interface indicator light. The on / off state of each indicator light corresponds to the working state of the interface. The intuitive indicator light design enables visual monitoring of the device status. For example, a constantly lit power indicator light indicates normal power supply, a flashing positioning indicator light indicates that data is being transmitted and received, and a constantly lit communication indicator light indicates a stable network connection, making it easy for users to quickly troubleshoot interface connection or module failures.

[0040] In one embodiment, the sealing ring 3 is integrally molded from silicone rubber material with a Shore hardness of 60-70. The height of the first raised frame 4 is 3-5mm, and the vertical distance between the first platform 5 and the bottom surface is 4-6mm, which is adapted to the fitting height of the upper shell 1 and the lower shell 2. The silicone rubber with a Shore hardness of 60-70 has both elasticity and wear resistance, and can maintain its deformation ability under long-term compression and vibration. The precisely designed height of the raised frame and the platform spacing can ensure that the sealing ring 3 forms an interference fit with the upper and lower shells 2, which not only ensures the sealing effect, but also avoids the accelerated aging of the sealing ring 3 caused by excessive compression.

[0041] In one embodiment, the lower housing 2 in this example has an outwardly extending edge 9, on which a fixing through hole 10 is provided. The fixing through hole 10 is used to fix the entire agricultural machinery operation Beidou monitoring terminal in a preset position using fasteners. The structure of the extending edge 9 can increase the contact area between the terminal and the mounting surface, dispersing the pressure brought by the weight of the equipment. The fixing through hole 10 and the internal threaded mounting hole at the bottom of the lower housing 2 form a dual mounting fit, which can be selected to directly fix with screws or indirectly fix with brackets according to the structural characteristics of different installation positions such as the agricultural machinery cab and frame, thereby improving installation flexibility.

[0042] Working principle

[0043] The agricultural machinery operation Beidou monitoring terminal in this embodiment achieves stable operation through "structural coordination and functional integration": sealing protection principle: the frame-type sealing ring forms a double radial sealing barrier through the radial nesting of the first raised frame and the inner wall of the upper shell, and the second raised frame and the inner wall of the sealing ring; at the same time, the axial compression of the end face of the upper shell and the first platform of the sealing ring, and the second platform of the lower shell and the bottom surface of the sealing ring, fills the radial sealing gap, jointly blocking the intrusion path of water and dust, and adapting to the humid and dusty environment in the field.

[0044] Installation and fixing principle: The internal threaded mounting hole at the bottom of the lower housing is compatible with universal mounting parts such as suction cup brackets and metal rod clamps. The extended side fixing through hole supports direct screw connection with the pre-set structure of agricultural machinery. The dual mounting structure allows for flexible selection of fixing methods to ensure the stable deployment of the terminal on different agricultural machinery such as tractors and harvesters.

[0045] Data transmission principle: The single-sided centralized interface component achieves cable anti-loosening connection through a threaded locking structure. The Beidou positioning module collects location information, the front / rear camera interface receives operation image data, the main control unit processes the data fusion, and then uploads it to the cloud platform through the data communication module to realize real-time linkage between positioning tracking and operation monitoring.

[0046] Status monitoring principle: The status indicator array provides real-time feedback on the operating status of each interface and module, providing intuitive basis for fault diagnosis of the main control unit and operation and maintenance by users.

[0047] Application scenarios

[0048] The Beidou monitoring terminal for agricultural machinery operations in this embodiment can be widely used in intelligent operation scenarios for various types of agricultural machinery.

[0049] Seeding operation monitoring scenario: By reading the data from the seeding monitoring module in real time and combining it with Beidou positioning information and time information, the terminal can achieve precise control over the seeding quality in the operation area.

[0050] Harvester operation monitoring scenario: The terminal connects to the camera through the front / rear camera interface to collect images of the harvesting area, simultaneously record the Beidou positioning trajectory, and upload data such as the operating area and harvesting progress to the cloud through the data communication module to realize the statistics of the amount of work and quality assessment.

[0051] Multi-machine collaborative operation scenario: In multi-machine collaborative operations such as joint land preparation and rice transplanting, the terminal realizes data interaction between devices through a centralized interface, and optimizes the scheduling path of agricultural machinery by combining positioning information, thereby improving the efficiency of field operations.

[0052] Complex Environment Adaptation: Designed for the characteristics of damp, vibrating, and dusty environments in the field, the terminal's composite sealing structure and anti-loosening interface can ensure long-term stable operation in different crop scenarios such as wheat fields, rice fields, and cornfields.

[0053] This embodiment of the Beidou monitoring terminal for agricultural machinery operations achieves four major technological breakthroughs through optimized core structure and functional design: a composite sealing structure of "radial nesting and axial compression," coupled with appropriately sized silicone rubber sealing rings, solves the sealing failure problem of traditional terminals in vibration environments; a dual design of bottom internal thread mounting holes and extended side fixing through holes meets the installation requirements of different agricultural machinery scenarios, reducing deployment costs; a single-sided centralized interface and threaded locking structure prevent cable tangling and vibration-induced loosening, ensuring continuous transmission of positioning, image, and other data; and modular circuit design and visualized status monitoring enable efficient linkage of positioning, communication, and image acquisition, supporting the intelligent operation needs of agricultural machinery. Through structural detail optimization and functional integration innovation, the overall solution significantly improves the terminal's applicability and reliability in complex agricultural environments, providing key equipment support for the precision and intelligent upgrading of agricultural production.

[0054] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A Beidou monitoring terminal for agricultural operation, characterized in that: The device includes an upper housing, a lower housing, a sealing ring, an interface assembly, and a circuit module. The upper housing and the lower housing are sealed together by the sealing ring, which forms a radial nesting fit and an axial compression seal with the upper housing and the lower housing, respectively. The interface assembly is centrally located on the same side of the terminal. The bottom of the lower housing has a threaded mounting hole for fitting a mounting bracket. The circuit module integrates a Beidou positioning module, a data communication module, and a main control unit, and is located within the accommodating cavity of the upper housing. The sealing ring has a frame structure, including a first raised frame, a first platform for receiving the end face of the upper housing, and a bottom surface for receiving the end face of the lower housing. In the installed state, the first raised frame enters the interior of the upper housing, and the side wall of the first raised frame is tightly fitted with the inner wall at the port of the upper housing to form a radial seal. The end face of the upper housing is flat and presses against the first platform of the sealing ring during assembly to form an axial seal. The end face of the lower housing is provided with a stepped structure, including a second raised frame and a second platform. In the installed state, the second raised frame enters the inner side of the sealing ring, and the side wall of the second raised frame is tightly fitted with the inner side of the sealing ring to form a radial seal; the second platform of the lower housing abuts against the bottom surface of the sealing ring to form an axial seal.

2. The agricultural operation monitoring terminal according to claim 1, characterized in that: The upper and lower housings are fixedly connected by fasteners. The lower housing has circumferentially distributed fixing through holes on the outer side of its trapezoidal structure. The fasteners pass through the fixing through holes and are screwed to the upper housing, so that the upper and lower housings press the sealing ring together.

3. The agricultural operation monitoring terminal according to claim 1, characterized in that: The interface component includes four main interfaces and one positioning antenna interface. The main interfaces are a power interface, an RS232 serial port interface, a front camera interface, and a rear camera interface. All interfaces are arranged along the same horizontal line on the side of the terminal.

4. The agricultural operation monitoring terminal according to claim 3, characterized in that: The outer wall of the interface component is provided with external threads, and the interface is equipped with a locking nut with internal threads. After the cable connector is inserted into the interface, it is fixed by screwing the locking nut into the interface.

5. The agricultural operation monitoring terminal according to claim 1, characterized in that: The upper housing has a cavity with supporting ribs extending along the inner wall. The circuit module is fixed to the supporting ribs by bolts, and a heat dissipation gap of 1-5mm is left between the circuit module and the inner wall of the upper housing.

6. The agricultural operation monitoring terminal according to claim 1, characterized in that: The Beidou positioning module, data communication module, and main control unit of the circuit module are electrically connected using a flexible flat cable.

7. The agricultural operation monitoring terminal according to claim 1, characterized in that: The outer surface of the upper housing is provided with an array of status indicator lights corresponding to the interface components, including power indicator lights, running status indicator lights, positioning indicator lights, communication indicator lights, serial port indicator lights and camera interface indicator lights. The on / off state of each indicator light corresponds to the working state of the interface.

8. The agricultural operation monitoring terminal according to any one of claims 1 to 7, characterized in that: The sealing ring is integrally molded from silicone rubber material with a Shore hardness of 60-70. The height of the first raised frame is 3-5mm, and the vertical distance between the first platform and the bottom surface is 4-6mm, which is adapted to the closing height of the upper and lower shells.

9. The agricultural operation monitoring terminal according to any one of claims 1 to 7, characterized in that: The lower housing has an outwardly extending edge, and a fixing through hole is provided on the extending edge; the fixing through hole is used to fix the entire agricultural machinery operation Beidou monitoring terminal in a preset position by fasteners.

Images