A pure Beidou positioning and time service device with anti-interference structure

Abstract

The utility model relates to big dipper positioning time service technical field especially, more particularly to a kind of pure big dipper positioning time service equipment with anti-interference structure, including lower shielding box, the upper end of lower shielding box is provided with upper shielding box;The inside of lower shielding box is provided with big dipper positioning time service circuit board;The upper end of big dipper positioning time service circuit board is provided with antenna module;The outside of antenna module is provided with electromagnetic shield sleeve;The upper end of electromagnetic shield sleeve is provided with positioning sleeve;The lower end of big dipper positioning time service circuit board is provided with insulating base;The lower end of insulating base is provided with electromagnetic shield plate.In the utility model, by multidirectional shielding, accurate installation and insulation design, block internal and external electromagnetic interference, guarantee signal transmission, realize the function of improving positioning time service precision and work stability.

Description

Technical Field

[0001] This utility model relates to the field of BeiDou positioning and timing technology, and in particular to a pure BeiDou positioning and timing device with an anti-interference structure. Background Technology

[0002] The development of pure BeiDou positioning and timing equipment is rooted in the independent construction and improvement of the BeiDou satellite navigation system. It is the core support for ensuring the spatiotemporal information security in key areas. As the global navigation field increases its demand for independent control, positioning and timing solutions that rely on foreign navigation systems have exposed potential risks. Pure BeiDou equipment has emerged because of its characteristic of receiving only BeiDou satellite signals.

[0003] Currently, pure BeiDou positioning and timing equipment still faces significant shortcomings in complex electromagnetic environments. Insufficient anti-interference capability has become a prominent issue. Interference sources such as industrial equipment, high-voltage lines, and military electromagnetic interference can easily suppress or deceive BeiDou signals, leading to a decrease in the equipment's signal acquisition rate. As a result, positioning data is prone to drift, and timing accuracy deviates from the standard benchmark, failing to meet the stringent requirements of scenarios such as fault recording and precise scheduling. More seriously, under strong interference, the equipment may frequently experience signal interruptions and restarts, significantly reducing operational stability. This not only affects daily operational efficiency but may also pose safety hazards in critical scenarios such as power emergency repairs and equipment coordination. Utility Model Content

[0004] In order to overcome the problem that the existing pure BeiDou positioning and timing equipment has insufficient anti-electromagnetic interference capability, resulting in decreased positioning and timing accuracy and poor working stability.

[0005] The technical solution of this utility model is as follows: a pure Beidou positioning and timing device with an anti-interference structure, comprising a lower shielding box, an upper shielding box being provided at the upper end of the lower shielding box; a Beidou positioning and timing circuit board being provided inside the lower shielding box; an antenna module being provided at the upper end of the Beidou positioning and timing circuit board; an electromagnetic shielding sleeve being provided outside the antenna module; a positioning sleeve being provided at the upper end of the electromagnetic shielding sleeve; an insulating base being provided at the lower end of the Beidou positioning and timing circuit board; an electromagnetic shielding plate being provided at the lower end of the insulating base; and an aluminum alloy back plate being provided on the lower end surface of the lower shielding box.

[0006] Preferably, the positioning sleeve is fixedly connected to the lower end face of the upper shielding box, and the positioning sleeve is made of metal; the electromagnetic shielding sleeve is fixedly connected to the positioning sleeve.

[0007] Preferably, the antenna module has a positioning hole inside; the positioning hole has a positioning post inside, and the positioning post is plugged into the positioning hole and fixedly connected to the Beidou positioning and timing circuit board; the antenna module and the Beidou positioning and timing circuit board are connected for communication.

[0008] Preferably, the outer shell of the antenna module is made of insulating material.

[0009] Preferably, a PVC cover is provided at the center of the upper shielding box, and the PVC cover is integrally formed with the upper shielding box.

[0010] Preferably, the four corners of the Beidou positioning and timing circuit board are connected to the interior of the lower shielding box by bolts; a communication cable is provided at the rear end of the lower shielding box, and the communication cable is electrically connected to the Beidou positioning and timing circuit board.

[0011] Preferably, the lower shielding box has a conductive rubber sealing strip on the inner side of its upper edge, and the conductive rubber sealing strip is fixedly connected to the lower shielding box, and the upper shielding box and the lower shielding box are sealed together by sealant.

[0012] The beneficial effects of this utility model are:

[0013] 1. A closed external shielding cavity is formed by the double sealing of the conductive rubber sealing strip and sealant fixed between the lower shielding box and the upper shielding box. Combined with the aluminum alloy back plate on the lower end of the lower shielding box and the electromagnetic shielding plate at the lower end of the Beidou positioning and timing circuit board, external electromagnetic interference signals are blocked from entering the interior from all sides and bottom of the equipment. This provides an interference-free working environment for the Beidou positioning and timing circuit board and antenna module, ensuring the normal operation of the core components.

[0014] 2. The antenna module is tightly wrapped by an electromagnetic shielding sleeve. The metal positioning sleeve is fixed to the upper shielding box and the electromagnetic shielding sleeve, providing stable support for the electromagnetic shielding sleeve. At the same time, the outer shell of the antenna module is made of insulating material, which reduces the impact of electromagnetic interference on the antenna module from both external shielding and self-insulation, ensuring that the antenna module can accurately receive Beidou satellite signals and improve the purity and accuracy of positioning and timing signals.

[0015] 3. The positioning post is fixed to the Beidou positioning and timing circuit board and inserted into the positioning hole of the antenna module to achieve precise installation of the antenna module. The Beidou positioning and timing circuit board is fixed to the lower shielding box with four corner bolts. The communication cable is electrically connected to the Beidou positioning and timing circuit board to ensure that the internal components are firmly installed and the signal transmission is stable. The insulating base isolates the Beidou positioning and timing circuit board from the electromagnetic shielding plate to avoid the risk of short circuit. At the same time, the PVC cover plate prevents the entry of foreign objects, ensuring long-term stable operation of the equipment and improving the service life and reliability of the equipment. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the present invention.

[0017] Figure 2 The diagram shown is a three-dimensional structural schematic of the present invention viewed from below.

[0018] Figure 3 The diagram shown is an exploded three-dimensional structural schematic of the present invention.

[0019] Figure 4 The diagram shown is an exploded three-dimensional structural diagram of the Beidou positioning and timing circuit board, antenna module, electromagnetic shielding sleeve, positioning sleeve, insulating base, and electromagnetic shielding plate combination of this utility model.

[0020] In the attached diagram, the following are the reference numerals: 101, lower shielding box; 102, upper shielding box; 103, conductive rubber sealing strip; 104, PVC cover plate; 105, aluminum alloy back plate; 106, communication cable; 201, Beidou positioning and timing circuit board; 202, positioning post; 203, antenna module; 204, positioning hole; 205, electromagnetic shielding sleeve; 206, positioning sleeve; 207, insulating base; 208, electromagnetic shielding plate. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] refer to Figure 1-4 The structure shown is a pure BeiDou positioning and timing device with an anti-interference structure, including a lower shielding box 101, an upper shielding box 102 at the upper end of the lower shielding box 101; a BeiDou positioning and timing circuit board 201 is disposed inside the lower shielding box 101; an antenna module 203 is disposed at the upper end of the BeiDou positioning and timing circuit board 201; an electromagnetic shielding sleeve 205 is disposed outside the antenna module 203; a positioning sleeve 206 is disposed at the upper end of the electromagnetic shielding sleeve 205; an insulating base 207 is disposed at the lower end of the BeiDou positioning and timing circuit board 201; an electromagnetic shielding plate 208 is disposed at the lower end of the insulating base 207; and an aluminum alloy back plate 105 is disposed on the lower end surface of the lower shielding box 101.

[0023] This invention solves the problem of insufficient electromagnetic interference resistance in existing pure BeiDou positioning and timing equipment, leading to decreased positioning and timing accuracy and poor operational stability. The complete workflow is as follows: The lower shielding box 101 and the upper shielding box 102 are connected by a conductive rubber sealing strip 103 fixed to the inner side of the upper edge of the lower shielding box 101 to fill the gap, and then sealed with sealant to form a closed external shielding cavity; an electromagnetic shielding sleeve 205 is fitted over the antenna module 203, and a metal positioning sleeve 206 is fixed to the lower end face of the upper shielding box 102. The electromagnetic shielding sleeve 205 is fixed to the positioning sleeve 206, forming a surrounding electromagnetic shield for the antenna module 203; an insulating base 207 and an electromagnetic shielding plate 208 are sequentially installed at the lower end of the BeiDou positioning and timing circuit board 201, and an aluminum alloy back plate 105 is installed on the lower end face of the lower shielding box 101 to block external electromagnetic signals from entering from the bottom; the outer shell of the antenna module 203 is made of insulating material to avoid its own electromagnetic radiation interfering with other components. The components are inserted into the positioning holes 204 of the antenna module 203 via positioning posts 202 fixed to the Beidou positioning and timing circuit board 201, achieving precise positioning and installation of the antenna module 203. Its communication connection with the Beidou positioning and timing circuit board 201 is not affected by installation deviation. The Beidou positioning and timing circuit board 201 is fixed to the lower shielding box 101 by bolts at the four corners. The communication cable 106 is electrically connected to the Beidou positioning and timing circuit board 201 to achieve signal transmission. The PVC cover 104 of the upper shielding box 102 seals the central area to prevent foreign objects from entering. Through the above multi-directional and multi-layer anti-interference structure design, external electromagnetic interference is blocked in all directions, and mutual interference between internal components is avoided, ensuring stable reception, processing and transmission of Beidou positioning and timing signals, and significantly improving the positioning and timing accuracy and working stability of the equipment.

[0024] To address the following issues: inaccurate installation and positioning of antenna module 203, unstable shielding structure connection, signal transmission between components susceptible to installation deviations, gaps at shielding box connections leading to interference infiltration, insecure fixing of Beidou positioning and timing circuit board 201 susceptible to vibration, potential electromagnetic radiation interference from antenna module 203 to other components, and easy entry of foreign objects into the equipment, referenced... Figures 2-4 The structure shown is as follows:

[0025] Furthermore, the positioning sleeve 206 is fixedly connected to the lower end face of the upper shielding box 102, and the positioning sleeve 206 is made of metal; the electromagnetic shielding sleeve 205 is fixedly connected to the positioning sleeve 206.

[0026] The positioning sleeve 206 is fixedly connected to the lower end face of the upper shielding box 102, and the electromagnetic shielding sleeve 205 is fixedly connected to the positioning sleeve 206. The metal positioning sleeve 206 provides a stable installation support for the electromagnetic shielding sleeve 205, so that the electromagnetic shielding sleeve 205 can tightly wrap around the outside of the antenna module 203, effectively blocking electromagnetic signals in the external environment from directly acting on the antenna module 203, and ensuring the stability of the antenna module 203 in receiving Beidou satellite signals.

[0027] Furthermore, the antenna module 203 has a positioning hole 204 inside; the positioning hole 204 has a positioning post 202 inside, and the positioning post 202 is plugged into the positioning hole 204, and the positioning post 202 is fixedly connected to the Beidou positioning and timing circuit board 201; the antenna module 203 and the Beidou positioning and timing circuit board 201 are connected in communication.

[0028] The positioning post 202 is fixedly connected to the Beidou positioning and timing circuit board 201. The positioning post 202 is inserted into the positioning hole 204 of the antenna module 203 to achieve insertion and positioning. This connection method allows the antenna module 203 to be accurately attached to the upper end of the Beidou positioning and timing circuit board 201. The communication connection between the antenna module 203 and the Beidou positioning and timing circuit board 201 will not be interrupted or attenuated due to the offset of the installation position, ensuring the continuity and accuracy of Beidou signal transmission.

[0029] Furthermore, the outer casing of the antenna module 203 is made of insulating material.

[0030] The outer shell of the antenna module 203 is made of insulating material, which can isolate the electromagnetic signals generated by the internal working elements of the antenna module 203 from radiating outward, prevent these electromagnetic signals from interfering with the adjacent Beidou positioning and timing circuit board 201, and prevent external conductors from accidentally contacting the outer shell of the antenna module 203, causing signal short circuits or abnormalities, thus ensuring the stability of the antenna module 203 itself.

[0031] Furthermore, a PVC cover plate 104 is provided at the center of the upper shielding box 102, and the PVC cover plate 104 is integrally formed with the upper shielding box 102.

[0032] The PVC cover 104 is integrally formed with the upper shielding box 102, which not only ensures the integrity and strength of the overall structure of the upper shielding box 102, but also does not block the path of the antenna module 203 to receive Beidou satellite signals. At the same time, it seals the central opening of the upper shielding box 102, effectively preventing external dust, moisture and debris from entering the equipment, avoiding internal component failure due to environmental factors, and maintaining the long-term stable operation of the anti-interference structure.

[0033] Furthermore, the four corners of the Beidou positioning and timing circuit board 201 are connected to the interior of the lower shielding box 101 by bolts; a communication cable 106 is provided at the rear end of the lower shielding box 101, and the communication cable 106 is electrically connected to the Beidou positioning and timing circuit board 201.

[0034] The four corners of the Beidou positioning and timing circuit board 201 are fixed to the interior of the lower shielding box 101 by bolts, so that the Beidou positioning and timing circuit board 201 remains absolutely stable inside the equipment. Even if the equipment is subjected to external vibration, it will not shift or shake. The communication cable 106 is electrically connected to the Beidou positioning and timing circuit board 201, and transmits the accurate signal processed by the Beidou positioning and timing circuit board 201 stably to the external receiving equipment, ensuring that there is no interference leakage and signal loss during signal transmission.

[0035] Furthermore, a conductive rubber sealing strip 103 is provided on the inner side of the upper edge of the lower shielding box 101, and the conductive rubber sealing strip 103 is fixedly connected to the lower shielding box 101, and the upper shielding box 102 and the lower shielding box 101 are sealed together by sealant.

[0036] The conductive rubber sealing strip 103 is fixed to the inner side of the upper edge of the lower shielding box 101. The upper shielding box 102 and the lower shielding box 101 are sealed with sealant. The conductive rubber sealing strip 103 fully fills the tiny gaps at the connection between the upper shielding box 102 and the lower shielding box 101. The sealant further enhances the sealing effect, forming a double protective barrier, completely blocking external electromagnetic interference signals from seeping into the equipment from the gaps, while also enhancing the overall sealing performance and structural stability of the shielding box.

[0037] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A pure BeiDou positioning and timing device with an anti-interference structure, characterized in that: The device includes a lower shielding box (101), with an upper shielding box (102) at its upper end; a Beidou positioning and timing circuit board (201) is disposed inside the lower shielding box (101); an antenna module (203) is disposed at the upper end of the Beidou positioning and timing circuit board (201); an electromagnetic shielding sleeve (205) is disposed outside the antenna module (203); a positioning sleeve (206) is disposed at the upper end of the electromagnetic shielding sleeve (205); an insulating base (207) is disposed at the lower end of the Beidou positioning and timing circuit board (201); an electromagnetic shielding plate (208) is disposed at the lower end of the insulating base (207); and an aluminum alloy back plate (105) is disposed on the lower end surface of the lower shielding box (101).

2. The pure BeiDou positioning and timing device with an anti-interference structure according to claim 1, characterized in that: The positioning sleeve (206) is fixedly connected to the lower end face of the upper shielding box (102), and the positioning sleeve (206) is made of metal; the electromagnetic shielding sleeve (205) is fixedly connected to the positioning sleeve (206).

3. The pure BeiDou positioning and timing device with an anti-interference structure according to claim 1, characterized in that: The antenna module (203) has a positioning hole (204) inside; the positioning hole (204) has a positioning post (202) inside, and the positioning post (202) is plugged into the positioning hole (204), and the positioning post (202) is fixedly connected to the Beidou positioning and timing circuit board (201); the antenna module (203) and the Beidou positioning and timing circuit board (201) are connected in communication.

4. A pure BeiDou positioning and timing device with an anti-interference structure according to claim 1, characterized in that: The outer shell of the antenna module (203) is made of insulating material.

5. A pure BeiDou positioning and timing device with an anti-interference structure according to claim 1, characterized in that: The upper shielding box (102) is provided with a PVC cover plate (104) at its center, and the PVC cover plate (104) is integrally formed with the upper shielding box (102).

6. A pure BeiDou positioning and timing device with an anti-interference structure according to claim 1, characterized in that: The four corners of the Beidou positioning and timing circuit board (201) are connected to the interior of the lower shielding box (101) by bolts; a communication cable (106) is provided at the rear end of the lower shielding box (101), and the communication cable (106) is electrically connected to the Beidou positioning and timing circuit board (201).

7. A pure BeiDou positioning and timing device with an anti-interference structure according to claim 1, characterized in that: The lower shielding box (101) has a conductive rubber sealing strip (103) on the inner side of its upper edge, and the conductive rubber sealing strip (103) is fixedly connected to the lower shielding box (101), and the upper shielding box (102) and the lower shielding box (101) are sealed together by sealant.

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