Geomagnetic acquisition device

Abstract

The utility model discloses a terrestrial magnetism acquisition device, and belongs to the field of instruments and meters. A shell of the geomagnetic acquisition device is of a cylindrical sleeve structure and comprises a top cover, a middle section and a bottom cover. The battery is arranged between the bottom cover and the middle section; the bracket is arranged above the battery and is positioned in the top cover; the PCB is arranged on the bracket and is connected with the battery; the geomagnetic sensor is arranged on the PCB and is used for collecting geomagnetic signals; the communication unit is arranged on the PCB and used for outputting geomagnetic signals. A cylindrical sleeve structure is adopted to improve the system protection level and facilitate mounting and dismounting; the low-power-consumption design ensures that the long-term outdoor working time is more than 10 years, and the maximum power consumption during working is only 2mA; the geomagnetic sensor collects magnetic field data in real time, the magnetic field data is processed by the communication unit and then output and uploaded to the cloud, efficient collection and transmission of the geomagnetic data are achieved, and the overall performance of the system is improved.

Description

Technical Field

[0001] This application relates to the field of instrumentation, and in particular to geomagnetic acquisition devices. Background Technology

[0002] A geomagnetic sensor is a device that can detect changes in the Earth's magnetic field and is widely used in parking space detection, traffic monitoring, navigation and positioning, and other fields. With the rapid development of intelligent transportation and Internet of Things (IoT) technologies, the application of geomagnetic sensors in parking management systems is becoming increasingly widespread.

[0003] Existing geomagnetic data acquisition devices still face several technical challenges. First, traditional geomagnetic sensors often employ wired connections, resulting in complex wiring, high installation and maintenance costs, and susceptibility to damage from external environmental factors. Second, some geomagnetic sensors utilizing wireless communication typically employ a single communication method, such as simple radio frequency communication or NB-IoT communication, leading to limited coverage and susceptibility to interference in complex environments, resulting in unstable data transmission. Furthermore, the structural design of existing geomagnetic sensor devices is not optimal, making them ill-suited for various complex installation environments, and their limited battery life necessitates frequent replacements, increasing maintenance costs.

[0004] Therefore, there is an urgent need for a geomagnetic acquisition device with a reasonable structure, reliable communication, and easy installation and maintenance, in order to solve the problems existing in the current technology and improve the efficiency and reliability of geomagnetic signal acquisition and transmission. Utility Model Content

[0005] To address the problem that traditional geomagnetic sensors, which mostly employ wired or single wireless communication methods, are difficult to adapt to various complex installation environments, a geomagnetic data acquisition device is provided that is structurally sound, has reliable communication capabilities, and is easy to install and maintain.

[0006] This application provides a geomagnetic data acquisition device, comprising:

[0007] The outer casing is a cylindrical sleeve structure, and the outer casing includes: a top cover, a middle section, and a bottom cover;

[0008] A battery is disposed inside the housing, between the bottom cover and the middle section;

[0009] A bracket is disposed inside the outer casing, and the bracket is disposed on the upper part of the battery, located inside the top cover;

[0010] A PCB board is mounted on the bracket and connected to the battery.

[0011] A geomagnetic sensor, mounted on the PCB board, is used to collect geomagnetic signals;

[0012] A communication unit, mounted on the PCB board, is used to output the geomagnetic signal.

[0013] Optionally, the cylindrical sleeve structure has a thicker upper section and a thinner lower section, with the outer diameter of the middle section being larger than the outer diameter of the bottom cover.

[0014] Optionally, the battery is a primary lithium battery or a rechargeable lithium battery.

[0015] Optionally, the communication unit includes:

[0016] The Mesh module, mounted on the PCB board, is connected to the battery and the geomagnetic sensor and is used to output the geomagnetic signal through a communication protocol.

[0017] An antenna, mounted on the PCB board and connected to the Mesh module, is used to output the signal output by the Mesh module or to send the received signal to the Mesh module.

[0018] Optionally, the bracket includes at least three uprights, a base, and a cover plate. The uprights are evenly arranged inside the top cover along the circumferential direction. The base is located on the upper part of the battery. The uprights are located between the base and the cover plate. The PCB board is fixed to the middle area of ​​the uprights.

[0019] Optionally, the column is made of copper, and the copper column is used to fix the PCB board between the base and the cover plate by screws.

[0020] Optionally, both the base and the cover are made of acrylic material.

[0021] Optionally, the outer shell is made of acrylic material.

[0022] The beneficial effects of the above technical solution are as follows:

[0023] In this technical solution, the outer shell of the geomagnetic acquisition device is a cylindrical sleeve structure, comprising a top cover, a middle section, and a bottom cover. The battery is positioned between the bottom cover and the middle section. A bracket is located above the battery and inside the top cover. A PCB board is mounted on the bracket and connected to the battery. A geomagnetic sensor is mounted on the PCB board for acquiring geomagnetic signals. A communication unit is mounted on the PCB board for outputting geomagnetic signals. The cylindrical sleeve structure improves the system's protection level and facilitates installation and disassembly. The low-power design ensures long-term outdoor operation for over 10 years, with a maximum power consumption of only 2mA during operation. The geomagnetic sensor acquires magnetic field data in real time, processes it through the communication unit, and then uploads it to the cloud, achieving efficient acquisition and transmission of geomagnetic data and improving the overall system performance. Attached Figure Description

[0024] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0025] Figure 1 This is a schematic diagram of one embodiment of the geomagnetic acquisition device described in this application;

[0026] Figure 2 This is a schematic diagram of the structure of a battery in one embodiment of the geomagnetic acquisition device described in this application;

[0027] Figure 3 This is a schematic diagram of one embodiment of the stent described in this application;

[0028] Figure 4 This is a schematic diagram of another embodiment of the stent described in this application;

[0029] Figure 5 This is a structural schematic diagram of one embodiment of the top cover and bracket described in this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Outer shell, 11. Bottom cover, 12. Middle section, 13. Top cover, 2. Battery, 31. Cover plate, 32. Column, 33. Base, 4. PCB board, 5. Geomagnetic sensor, 61. Mesh module, 62. Detailed Implementation

[0032] The advantages of this application are further illustrated below with reference to the accompanying drawings and specific embodiments.

[0033] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates 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 disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0034] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0035] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0036] In the description of this application, it should be understood that the numerical labels before the steps do not indicate the order of the steps, but are only used to facilitate the description of this application and to distinguish each step, and therefore should not be construed as a limitation of this application.

[0037] The geomagnetic data acquisition device of this application embodiment can be applied to automotive electronics, industrial testing, and traffic navigation and positioning. The outer casing 1 of the geomagnetic data acquisition device has a cylindrical sleeve structure, comprising: a top cover 13, a middle section 12, and a bottom cover 11; a battery 2 is disposed between the bottom cover 11 and the middle section 12; a bracket is disposed above the battery 2, located inside the top cover 13; a PCB board 4 is disposed on the bracket and connected to the battery 2; a geomagnetic sensor 5 is disposed on the PCB board 4 for acquiring geomagnetic signals; and a communication unit is disposed on the PCB board 4 for outputting geomagnetic signals. The cylindrical sleeve structure improves the system's protection level and facilitates installation and disassembly; the low-power design ensures long-term outdoor operation for more than 10 years, with a maximum power consumption of only 2mA during operation; the geomagnetic sensor 5 acquires magnetic field data in real time, processes it through the communication unit, and then outputs and uploads it to the cloud, achieving efficient acquisition and transmission of geomagnetic data and improving the overall system performance.

[0038] Example 1

[0039] See Figures 1-5 The geomagnetic acquisition device provided in this embodiment includes: a housing 1, a battery 2, a bracket, a PCB board 4, a geomagnetic sensor 5, and a communication unit.

[0040] The outer casing 1 has a cylindrical sleeve structure and includes: a top cover 13, a middle section 12 and a bottom cover 11;

[0041] Furthermore, the outer shell 1 can be made of acrylic material, which has good light transmittance and weather resistance, effectively protecting the internal electronic components from external environmental influences. The top cover 13 and the middle section 12 are connected by threads, facilitating the installation and maintenance of internal components. The middle section 12 and the bottom cover 11 are also connected by threads, forming a complete sealed structure. The cylindrical sleeve structure has a thicker top and a thinner bottom, with the outer diameter of the middle section 12 being larger than that of the bottom cover 11. This design makes the device more stable during installation and reduces the bottom volume, facilitating buried installation.

[0042] Battery 2 is disposed inside the outer casing 1, and the battery 2 is disposed between the bottom cover 11 and the middle section 12;

[0043] Furthermore, battery 2 can be a lithium primary battery with a capacity of 3000mAh and an operating voltage of 3.7V, capable of providing a stable power supply for the geomagnetic acquisition device over a long period of time. Battery 2 is connected to PCB board 4 via positive and negative leads to provide power to the entire system. Battery 2 is externally wrapped with insulating material to prevent short circuits with the outer casing 1.

[0044] A bracket is disposed inside the outer casing 1, and the bracket is disposed on the upper part of the battery 2, located inside the top cover 13;

[0045] Furthermore, the bracket includes at least three uprights 32, a base 33, and a cover plate 31. The uprights 32 are evenly arranged inside the top cover 13 along the circumferential direction. The base 33 is disposed on the upper part of the battery 2. The uprights 32 are disposed between the base 33 and the cover plate 31. The PCB board 4 is fixed to the middle section 12 of the uprights 32.

[0046] As an example and not a limitation, when the support includes three columns 32, the three columns 32 are evenly arranged inside the top cover 13 along the circumferential direction and distributed at a 120° angle to ensure the stability of the support structure.

[0047] In this embodiment, the base 33 is disposed on the upper part of the battery 2, closely fitting the upper surface of the battery 2, and serves to fix the battery 2. The column 32 is disposed between the base 33 and the cover plate 31, forming a stable support structure. The column 32 can be made of copper, with a diameter of 5mm and a height of 30mm, possessing good thermal conductivity and mechanical strength. The copper column is used to fix the PCB board 4 between the base 33 and the cover plate 31 using screws, which can be M3 size and 10mm in length. Both the base 33 and the cover plate 31 are made of acrylic material with a thickness of 2mm, possessing good insulation and processing performance. The diameter of the base 33 matches the diameter of the battery 2, being 40mm; the diameter of the cover plate 31 is 45mm, slightly smaller than the inner diameter of the top cover 13, facilitating installation and disassembly.

[0048] PCB board 4 is mounted on the bracket and connected to battery 2;

[0049] In this embodiment, the PCB board 4 is fixed to the middle area of ​​the column 32 by screws on the copper column. The PCB board 4 can be a four-layer board design, with a thickness of 1.6mm and a diameter of 38mm, in a circular structure to match the circular structure of the bracket. The PCB board 4 is equipped with a power management circuit, a signal processing circuit, and a communication interface circuit. The power management circuit includes a voltage regulator and a battery 2 protection circuit to ensure stable system operating voltage and protect the battery 2 from overcharging and over-discharging. The signal processing circuit is responsible for filtering, amplifying, and performing analog-to-digital conversion on the raw signal collected by the geomagnetic sensor 5 to improve signal quality. The communication interface circuit provides a standard interface for the communication unit to ensure reliable data transmission.

[0050] A geomagnetic sensor 5 is mounted on the PCB board 4 and is used to collect geomagnetic signals;

[0051] In this embodiment, the geomagnetic sensor 5 can be a triaxial magnetoresistive sensor with a measurement range of ±8 Gauss, a resolution of 0.5 milligauss, and a sampling frequency of 100Hz. The geomagnetic sensor 5 is soldered onto the PCB board 4 using SMT technology and can be positioned at the center of the PCB board 4 to obtain the optimal geomagnetic field signal. The geomagnetic sensor 5 connects to the microcontroller on the PCB board 4 via an I2C interface to exchange data. The geomagnetic sensor 5 can detect minute changes in the Earth's magnetic field; when a ferromagnetic object passes by, it causes a change in the local magnetic field, which is then detected by the sensor.

[0052] A communication unit is disposed on the PCB board 4 and is used to output the geomagnetic signal.

[0053] Furthermore, the communication unit may include a Mesh module 61 and an antenna 62.

[0054] Mesh module 61 is mounted on the PCB board 4 and connected to the battery 2 and the geomagnetic sensor 5, and is used to output the geomagnetic signal through a communication protocol.

[0055] Antenna 62 is mounted on the PCB board 4 and connected to the Mesh module 61. It is used to output the signal output by the Mesh module 61 or to send the received signal to the Mesh module 61.

[0056] In this embodiment, the Mesh module 61 can employ a low-power wireless communication chip with an operating frequency of 2.4 GHz, a transmit power of 0 dBm, a receive sensitivity of -95 dBm, and a communication distance of up to 100 meters. The Mesh module 61 supports self-organizing networking, enabling it to form a network with other surrounding geomagnetic data acquisition devices, achieving data relay transmission and expanding coverage. The antenna 62 can be designed with an internal antenna on the PCB board 4, with a gain of 2 dBi, an impedance of 50 ohms, and a VSWR of less than 1.5, ensuring effective signal transmission and reception. Alternatively, an external antenna 62 can be used to enhance the accuracy and effectiveness of signal transmission and reception.

[0057] In this embodiment, the outer casing 1 of the geomagnetic acquisition device has a cylindrical sleeve structure, comprising: a top cover 13, a middle section 12, and a bottom cover 11; a battery 2 is disposed between the bottom cover 11 and the middle section 12; a bracket is disposed on the upper part of the battery 2, located inside the top cover 13; a PCB board 4 is disposed on the bracket and connected to the battery 2; a geomagnetic sensor 5 is disposed on the PCB board 4 for acquiring geomagnetic signals; and a communication unit is disposed on the PCB board 4 for outputting geomagnetic signals. The cylindrical sleeve structure improves the system's protection level and facilitates installation and disassembly; the low-power design ensures long-term outdoor operation for more than 10 years, with a maximum power consumption of only 2mA during operation; the geomagnetic sensor 5 acquires magnetic field data in real time, processes it through the communication unit, and then outputs and uploads it to the cloud, achieving efficient acquisition and transmission of geomagnetic data and improving the overall system performance.

[0058] The geomagnetic data acquisition device operates as follows: Geomagnetic sensor 5 acquires geomagnetic field signals in real time. When a change in the geomagnetic field is detected, the signal is transmitted to the microcontroller on PCB board 4 for processing. The microcontroller filters, amplifies, and performs analog-to-digital conversion on the signal, then packages the data through the Mesh module 61 of the communication unit and transmits it through antenna 62. The data can be sent directly to the receiving terminal or relayed through other geomagnetic data acquisition devices, ultimately reaching the data processing center. By analyzing the changes in the geomagnetic field, the data processing center can determine the passage of vehicles, achieving vehicle detection and traffic flow statistics functions.

[0059] Example 2

[0060] A geomagnetic data acquisition device is basically the same as in Embodiment 1, except that: battery 2 is a rechargeable lithium battery with a capacity of 2500mAh and an operating voltage of 3.7V, which has rechargeable characteristics and extends the service life of the device. The rechargeable lithium battery has a built-in protection circuit to prevent overcharging and over-discharging, improving the safety of the system. The rechargeable lithium battery is charged through a charging port reserved at the bottom of the casing 1, and the charging operation can be completed without disassembling the device.

[0061] Example 3

[0062] A geomagnetic data acquisition device is basically the same as in Embodiment 1, except that the support includes four columns 32, a base 33, and a cover plate 31. The four columns 32 are evenly arranged circumferentially inside the top cover 13 at a 90° angle, increasing the stability and load-bearing capacity of the support structure. The columns 32 are made of copper, with a diameter of 6mm and a height of 28mm, providing stronger mechanical strength and better heat dissipation. The copper columns fix the PCB board 4 between the base 33 and the cover plate 31 using screws of M4 specification, 12mm in length, to enhance the fixing effect.

[0063] It should be noted that Embodiment 1, Embodiment 2, and Embodiment 3 are all types of geomagnetic acquisition devices.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A geomagnetic data acquisition device, characterized in that, include: The outer casing is a cylindrical sleeve structure, and the outer casing includes: a top cover, a middle section, and a bottom cover; A battery is disposed inside the housing, between the bottom cover and the middle section; A bracket is disposed inside the outer casing, and the bracket is disposed on the upper part of the battery, located inside the top cover; A PCB board is mounted on the bracket and connected to the battery. A geomagnetic sensor, mounted on the PCB board, is used to collect geomagnetic signals; A communication unit, mounted on the PCB board, is used to output the geomagnetic signal.

2. The geomagnetic acquisition device according to claim 1, characterized in that, The cylindrical sleeve structure has a thicker upper section and a thinner lower section, with the outer diameter of the middle section being larger than the outer diameter of the bottom cover.

3. The geomagnetic data acquisition device according to claim 1, characterized in that, The battery is a primary lithium battery or a rechargeable lithium battery.

4. The geomagnetic acquisition device according to claim 1, characterized in that, The communication unit includes: The Mesh module, mounted on the PCB board, is connected to the battery and the geomagnetic sensor and is used to output the geomagnetic signal through a communication protocol. An antenna, mounted on the PCB board and connected to the Mesh module, is used to output the signal output by the Mesh module or to send the received signal to the Mesh module.

5. The geomagnetic acquisition device according to claim 1, characterized in that, The bracket includes at least three uprights, a base, and a cover plate. The uprights are evenly arranged inside the top cover along the circumferential direction. The base is located on the upper part of the battery. The uprights are located between the base and the cover plate. The PCB board is fixed to the middle area of ​​the uprights.

6. The geomagnetic acquisition device according to claim 5, characterized in that, The column is made of copper, and the copper column is used to fix the PCB board between the base and the cover plate by screws.

7. The geomagnetic acquisition device according to claim 5, characterized in that, Both the base and the cover are made of acrylic material.

8. The geomagnetic acquisition device according to claim 1, characterized in that, The outer shell is made of acrylic material.

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