Magnetic field intensity measuring device

Abstract

The utility model relates to the technical field of field intensity detection, and discloses a magnetic field intensity measuring device, which comprises an antenna module, a coupling module, a main control module and a display module, the antenna module is electrically connected with the coupling module, and the antenna module is used for converting the sensed magnetic field energy of the tested equipment into an alternating current signal and transmitting the alternating current signal to the coupling module; the coupling module is electrically connected with the main control module, and the coupling module is used for processing the alternating current signal to obtain a corresponding digital signal and transmitting the digital signal to the main control module; and the main control module is electrically connected with the display module and is used for determining a field intensity value based on the digital signal and controlling the display module to display the corresponding field intensity value. The intensity value of the magnetic field of the tested equipment can be directly and accurately displayed, and the operation process of a user is greatly simplified.

Description

Technical Field

[0001] This disclosure relates to the technical field of field strength detection, and for example to a magnetic field strength measuring device. Background Technology

[0002] Measuring magnetic field strength is an important task. Traditional methods include Hall effect sensors and fluxgate sensors. While these devices provide relatively accurate magnetic field data, they are often costly, bulky, and limited in their application in certain environments. In related technologies, an LED panel combined with a coupling coil can provide a simple and intuitive indication of the presence and strength of a magnetic field. This method utilizes the principle that an alternating electromagnetic field acting on the coupling coil generates an induced current, which in turn drives the LED to emit light. When a strong magnetic field is present in the environment, the LED becomes brighter; conversely, it becomes dimmer or does not light up. This design is simple and low-cost, but it also has significant drawbacks: firstly, the displayed results are not quantitative enough, making it difficult to directly provide specific magnetic field strength values; secondly, its sensitivity to weak magnetic fields is limited.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0005] This disclosure provides a magnetic field strength measuring device that can directly and accurately display the magnetic field strength value of the device being measured.

[0006] The magnetic field strength measuring device provided in this embodiment includes an antenna module, a coupling module, a main control module, and a display module.

[0007] The antenna module is electrically connected to the coupling module. The antenna module is used to convert the magnetic field energy of the sensed device under test into an AC signal and transmit it to the coupling module.

[0008] The coupling module is electrically connected to the main control module. The coupling module is used to process the AC signal to obtain the corresponding digital signal and transmit the digital signal to the main control module.

[0009] The main control module is electrically connected to the display module. The main control module is used to determine the field strength value based on the digital signal and control the display module to display the corresponding field strength value.

[0010] In some embodiments, the coupling module includes a rectification unit, a signal optimization unit, and an analog-to-digital conversion unit;

[0011] The rectifier unit is electrically connected to the antenna module. The rectifier unit is used to convert AC signals into DC signals and transmit the DC signals to the signal optimization unit.

[0012] The signal optimization unit is electrically connected to the analog-to-digital conversion unit. The signal optimization unit is used to optimize the DC signal and transmit the optimized DC signal to the analog-to-digital conversion unit.

[0013] The analog-to-digital converter (ADC) is electrically connected to the main control module. The ADC is used to convert DC signals into corresponding digital signals and transmit the digital signals to the main control module.

[0014] In some embodiments, the signal optimization unit includes a filtering subunit and an attenuation subunit;

[0015] The filtering subunit is electrically connected to the analog-to-digital conversion unit. The filtering subunit is used to filter the DC signal and transmit the filtered DC signal to the attenuation subunit.

[0016] The attenuation subunit is electrically connected to the filter subunit. The attenuation subunit is used to attenuate the DC signal and transmit the attenuated DC signal to the analog-to-digital conversion unit.

[0017] In some embodiments, the antenna module includes a standard coupling coil and a matching circuit;

[0018] The standard coupling coil is electrically connected to the matching circuit. The standard coupling coil is used to convert the magnetic field energy of the induced device under test into an alternating current signal.

[0019] The matching circuit is electrically connected to the coupling module. The matching circuit is used for impedance matching and resonant tuning of AC signals.

[0020] In some embodiments, the magnetic field strength measuring device further includes a power supply module, which is electrically connected to the main control module and the display module, respectively.

[0021] In some embodiments, the power module is provided with a charging module.

[0022] In some embodiments, the magnetic field strength measuring device further includes a voice module, and the main control module is electrically connected to the voice module. The main control module is used to control the field strength value played by the voice module.

[0023] In some embodiments, the magnetic field strength measuring device further includes a transmitting module, and a main control module is electrically connected to the transmitting module. The main control module is used to control the transmitting module to transmit information containing field strength values ​​to a designated device.

[0024] In some embodiments, the magnetic field strength measuring device further includes multiple indicator lights, and the main control module is electrically connected to each indicator light. The main control module controls the corresponding indicator light to illuminate according to the field strength value.

[0025] In some embodiments, the magnetic field strength measuring device further includes a light panel, with each indicator light mounted on the light panel, and the light panel is arranged adjacent to the display module.

[0026] The magnetic field strength measuring device provided in this disclosure can achieve the following technical effects:

[0027] This system achieves more accurate and efficient magnetic field strength measurement by integrating an antenna module, coupling module, main control module, and display module. Specifically, a professionally designed antenna module captures external magnetic field information, and an optimized coupling circuit efficiently converts the collected energy into an electrical signal form suitable for analysis and processing. Fine-tuning of the coupling process ensures a sufficiently strong signal output even under low magnetic field conditions, thus expanding the device's application range. Converting analog signals to digital format and calculating the specific magnetic field strength value using algorithms not only improves reading accuracy but also facilitates subsequent data processing. An easy-to-understand display module directly and accurately shows the magnetic field strength value of the device under test, greatly simplifying the user's operation. Furthermore, the magnetic field strength measurement device has a compact and lightweight overall structure, making it easy to carry for field operations and suitable for rapid magnetic field detection needs in various scenarios.

[0028] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0029] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0030] Figure 1 This is a schematic diagram of the structure of a magnetic field strength measuring device provided in an embodiment of this disclosure;

[0031] Figure 2 This is a schematic diagram illustrating an application scenario of a magnetic field strength measuring device provided in an embodiment of this disclosure;

[0032] Figure 3 This is a schematic diagram of another magnetic field strength measuring device provided in this embodiment;

[0033] Figure 4 This is a schematic diagram of the processing of AC signals by a coupling module according to an embodiment of this disclosure;

[0034] Figure 5 This is a schematic diagram of the structure of a coupling module provided in an embodiment of this disclosure;

[0035] Figure 6 This is a schematic diagram of another magnetic field strength measuring device provided in this embodiment;

[0036] Figure 7 This is a schematic diagram of another magnetic field strength measuring device provided in this embodiment;

[0037] Figure 8 This is a schematic diagram of another magnetic field strength measuring device provided in an embodiment of this disclosure.

[0038] Figure label:

[0039] 100 - Magnetic field strength measuring device;

[0040] 1-Antenna module;

[0041] 11 - Standard coupling coil; 12 - Matching circuit;

[0042] 2-Coupled Module;

[0043] 21-Rectifier unit, 22-Signal optimization unit, 23-Analog-to-digital converter unit;

[0044] 221 - Filtering subunit, 222 - Attenuation subunit;

[0045] 3-Main control module, 4-Display module, 5-Power supply module, 6-Voice module;

[0046] 7-Transmitting module, 8-Indicator light, 9-Light board.

[0047] 200 - The device under test. Detailed Implementation

[0048] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0049] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0050] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0051] Furthermore, the terms "setup," "connection," and "fixation" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances. In the embodiments of this disclosure, communication connections include electrical connections for transmitting electrical signals and optical fiber connections for transmitting optical signals. Without departing from the inventive concept of the embodiments of this disclosure, communication connections can be wired or wireless.

[0052] Unless otherwise stated, the term "multiple" means two or more.

[0053] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0054] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0055] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0056] Combination Figure 1 and Figure 2 As shown, this embodiment of the present disclosure provides a magnetic field strength measuring device 100, which includes an antenna module 1, a coupling module 2, a main control module 3, and a display module 4. The antenna module 1 is electrically connected to the coupling module 2, the coupling module 2 is electrically connected to the main control module 3, and the main control module 3 is electrically connected to the display module 4.

[0057] The magnetic field strength measuring device 100 can detect the magnetic field strength of the device under test 200, where the device under test 200 is a device capable of generating a magnetic field, such as a device with NFC (Near Field Communication) functionality. When the magnetic field strength measuring device 100 approaches the device under test 200, the antenna module 1 converts the sensed magnetic field energy of the device under test 200 into an alternating current signal and transmits it to the coupling module 2. The coupling module 2 processes the alternating current signal to obtain a corresponding digital signal, which is then transmitted to the main control module 3. The main control module 3 determines the field strength value based on the digital signal and controls the display module 4 to display the corresponding field strength value. The display module 4 can be a display screen or a digital display tube, etc.

[0058] The magnetic field strength measuring device 100 provided in this embodiment achieves more accurate and efficient magnetic field strength measurement by integrating an antenna module 1, a coupling module 2, a main control module 3, and a display module 4. Specifically, a professionally designed antenna module 1 is used to capture external magnetic field information, and the collected energy is efficiently converted into an electrical signal form that can be analyzed and processed through an optimized coupling circuit. By finely controlling the coupling process, a sufficiently strong signal output can be obtained even under low magnetic field conditions, thereby expanding the application range of the device. Converting the analog signal into a digital format and calculating the specific magnetic field strength value through an algorithm not only improves the accuracy of the reading but also facilitates subsequent data processing. Equipped with an easy-to-understand display module 4, the display module 4 can directly and accurately display the magnetic field strength value of the device under test 200, greatly simplifying the user's operation process. Moreover, the overall structure of the magnetic field strength measuring device 100 is compact and lightweight, making it easy to carry for field operations and suitable for rapid magnetic field detection needs in various scenarios.

[0059] Combination Figure 3 As shown, the coupling module 2 includes a rectifier unit 21, a signal optimization unit 22, and an analog-to-digital converter (ADC) unit 23. The rectifier unit 21 is electrically connected to the antenna module 1, the signal optimization unit 22 is electrically connected to the ADC unit 23, and the ADC unit 23 is electrically connected to the main control module 3.

[0060] In this embodiment, the rectifier unit 21 can be a full-wave rectifier unit 21. The rectifier unit 21 can be a transformer consisting of two diodes and a center tap, where the center tap of the transformer splits the AC signal into two parts with opposite phases, each part being rectified by a separate diode. Alternatively, the rectifier unit 21 can be a bridge circuit consisting of four diodes. The average value of the output voltage of this type of rectifier unit 21 is close to the peak value of the input voltage, eliminating the need for a center-tapped transformer.

[0061] In this embodiment of the disclosure, the analog-to-digital converter 23 is a circuit that converts analog signals into digital signals. The analog-to-digital converter 23 may be a successive approximation analog-to-digital converter 23, a dual-slope analog-to-digital converter 23, or a parallel comparison analog-to-digital converter 23, etc.

[0062] When the magnetic field strength measuring device 100 approaches the device under test 200, the antenna module 1 can convert the magnetic field energy sensed by the device under test 200 into an alternating current signal and transmit it to the rectifier unit 21. The rectifier unit 21 converts the alternating current signal into a direct current signal, and then transmits the direct current signal to the signal optimization unit 22. The signal optimization unit 22 optimizes the direct current signal, and then transmits the optimized direct current signal to the analog-to-digital converter unit 23. The analog-to-digital converter unit 23 is used to convert the direct current signal into a corresponding digital signal and transmit the digital signal to the main control module 3.

[0063] Combination Figure 4 As shown in the diagram, the sine wave represents an alternating current (AC) signal. During rectification, the negative half-cycle of the sine wave is "flipped," becoming part of the positive half-cycle, forming a continuous, unidirectional pulsating DC signal. This pulsating DC signal is then converted into a DC signal with a substantially constant voltage.

[0064] Combination Figure 5 As shown, the signal optimization unit 22 includes a filtering subunit 221 and an attenuation subunit 222. The filtering subunit 221 is electrically connected to the analog-to-digital converter unit 23, and the attenuation subunit 222 is electrically connected to both the filtering subunit 221 and the analog-to-digital converter unit 23. The filtering subunit 221 is used to filter the DC signal and transmit the filtered DC signal to the attenuation subunit 222. The attenuation subunit 222 is electrically connected to the filtering subunit 221 and is used to attenuate the DC signal and transmit the attenuated DC signal to the analog-to-digital converter unit 23.

[0065] In this embodiment, the filter subunit 221 can filter out unwanted frequency components, reduce noise and interference, make the signal more stable and smooth, and improve the signal-to-noise ratio. The type of filter subunit 221 can be determined according to actual design needs. For example, the filter subunit 221 can be a low-pass filter, a high-pass filter, a band-pass filter, or a band-stop filter.

[0066] In this embodiment, the attenuation subunit 222 can adjust the signal amplitude to a suitable level to meet the requirements of subsequent circuits and prevent excessively strong signals from damaging sensitive electronic components. The type of attenuation subunit 222 can be determined according to actual design needs; for example, the attenuation subunit 222 can be a fixed attenuator or a variable attenuator.

[0067] Combination Figure 6 As shown, antenna module 1 includes a standard coupling coil 11 and a matching circuit 12. The standard coupling coil 11 is electrically connected to the matching circuit 12, and the matching circuit 12 is electrically connected to the coupling module 2. Combined with... Figure 3 and Figure 6 As shown, the matching circuit 12 is electrically connected to the rectifier unit 21 in the coupling module 2. The standard coupling coil 11 is used to convert the magnetic field energy of the induced device under test 200 into an alternating current signal, and the matching circuit 12 is used to perform impedance matching and resonant tuning on the alternating current signal.

[0068] In the embodiments of this disclosure, the standard coupling coil 11 is typically a planar helical coil, the specific size and number of turns of which depend on the required operating frequency and application requirements. The coil may be made of copper wire or other conductive materials, and sometimes magnetic materials such as ferrite are used as the core material to enhance performance.

[0069] In this embodiment, the matching circuit 12 performs impedance matching on the AC signal, ensuring impedance matching between the standard coupling coil 11 and subsequent circuits to maximize energy transfer efficiency and reduce reflection losses. The matching circuit 12 also performs resonant tuning on the AC signal, adjusting the circuit's resonant frequency to match the operating frequency, thereby enhancing signal strength.

[0070] In this embodiment, the matching circuit 12 can be composed of capacitors, inductors, and resistors. By selecting appropriate capacitor and inductor values, the matching circuit 12 can match the input impedance of the standard coupling coil 11 with the input impedance of subsequent circuits (such as rectifier circuits, amplifiers, etc.). This ensures that the maximum amount of energy is transferred from the coil to the subsequent circuits while reducing signal reflection and distortion.

[0071] In this embodiment, the magnetic field strength measuring device 100 further includes a power module 5, which is electrically connected to the main control module 3 and the display module 4, respectively, and is used to supply power to the main control module 3 and the display module 4. The inclusion of the power module 5 in the magnetic field strength measuring device 100 makes it more portable and applicable to a wider range of testing scenarios.

[0072] In some embodiments, the power module 5 is provided with a charging module (not shown in the figure). The charging module can be a charging port, such as a USB (Universal Serial Bus) interface. The charging module can also be a wireless charging module.

[0073] Combination Figure 8 As shown, the magnetic field strength measuring device 100 also includes a voice module 6, which is electrically connected to the power supply module 5. The main control module 3 is electrically connected to the voice module 6 and is used to control the field strength value played by the voice module 6. Voice broadcasting can directly convey the field strength value to the user, allowing the user to obtain the field strength value even when it is inconvenient to view the display module 4. Voice broadcasting provides a more user-friendly interactive method.

[0074] Combination Figure 8 As shown, the magnetic field strength measuring device 100 also includes a transmitting module 7, which is electrically connected to the power supply module 5. A main control module 3 is electrically connected to the transmitting module 7 and is used to control the transmitting module 7 to transmit information containing the field strength value to a designated device. The designated device can be a user terminal or a server, etc., and can store the received field strength value.

[0075] In this embodiment of the disclosure, the transmitting module 7 refers to an electronic component capable of wirelessly transmitting data or signals to other devices. The transmitting module 7 may be a Bluetooth module, a Wi-Fi module, or a radio frequency module.

[0076] Combination Figure 8 As shown, the magnetic field strength measuring device 100 also includes multiple indicator lights 8, which are electrically connected to the power supply module 5. The main control module 3 is electrically connected to each indicator light 8, and controls the corresponding indicator light 8 to illuminate according to the field strength value.

[0077] In this embodiment, each indicator light 8 corresponds to a range of field strength values, and the light emission color or size of each indicator light 8 is different. When the field strength value determined by the main control module 3 is within the range of field strength values ​​corresponding to a certain indicator light 8, the main control module 3 controls the indicator light 8 to emit light. This allows users to more intuitively connect the magnetic field strength level of the device under test 200.

[0078] Combination Figure 8As shown, the magnetic field strength measuring device 100 also includes a light panel 9, with indicator lights 8 mounted on the light panel 9. The light panel 9 is arranged adjacent to the display module 4. Because the light panel 9 and the display module 4 are arranged adjacent to each other, the user can simultaneously see detailed digital displays (via the display module 4) and intuitive status indications (via the indicator lights 8) within one area. This centralized display method reduces the user's eye movement and improves the efficiency of information acquisition. The user can more intuitively connect the magnetic field strength level of the device under test 200 through the indicator lights 8.

[0079] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A magnetic field strength measuring device, characterized in that, It includes an antenna module, a coupling module, a main control module, and a display module; The antenna module is electrically connected to the coupling module. The antenna module is used to convert the magnetic field energy of the sensed device under test into an AC signal and transmit it to the coupling module. The coupling module is electrically connected to the main control module. The coupling module is used to process the AC signal to obtain the corresponding digital signal and transmit the digital signal to the main control module. The main control module is electrically connected to the display module. The main control module is used to determine the field strength value based on the digital signal and control the display module to display the corresponding field strength value.

2. The magnetic field strength measuring device according to claim 1, characterized in that, The coupling module includes a rectification unit, a signal optimization unit, and an analog-to-digital conversion unit; The rectifier unit is electrically connected to the antenna module. The rectifier unit is used to convert AC signals into DC signals and transmit the DC signals to the signal optimization unit. The signal optimization unit is electrically connected to the analog-to-digital conversion unit. The signal optimization unit is used to optimize the DC signal and transmit the optimized DC signal to the analog-to-digital conversion unit. The analog-to-digital converter (ADC) is electrically connected to the main control module. The ADC is used to convert DC signals into corresponding digital signals and transmit the digital signals to the main control module.

3. The magnetic field strength measuring device according to claim 2, characterized in that, The signal optimization unit includes a filtering subunit and an attenuation subunit; The filtering subunit is electrically connected to the analog-to-digital conversion unit. The filtering subunit is used to filter the DC signal and transmit the filtered DC signal to the attenuation subunit. The attenuation subunit is electrically connected to the filter subunit. The attenuation subunit is used to attenuate the DC signal and transmit the attenuated DC signal to the analog-to-digital conversion unit.

4. The magnetic field strength measuring device according to claim 1, characterized in that, The antenna module includes a standard coupling coil and a matching circuit; The standard coupling coil is electrically connected to the matching circuit. The standard coupling coil is used to convert the magnetic field energy of the induced device under test into an alternating current signal. The matching circuit is electrically connected to the coupling module. The matching circuit is used for impedance matching and resonant tuning of AC signals.

5. The magnetic field strength measuring device according to claim 1, characterized in that, It also includes a power module, which is electrically connected to both the main control module and the display module.

6. The magnetic field strength measuring device according to claim 5, characterized in that, The power module is equipped with a charging module.

7. The magnetic field strength measuring device according to claim 1, characterized in that, It also includes a voice module, and the main control module is electrically connected to the voice module. The main control module is used to control the field strength value played by the voice module.

8. The magnetic field strength measuring device according to claim 1, characterized in that, It also includes a transmitting module, and the main control module is electrically connected to the transmitting module. The main control module is used to control the transmitting module to transmit information containing field strength values ​​to the designated device.

9. The magnetic field strength measuring device according to claim 1, characterized in that, It also includes multiple indicator lights, with the main control module electrically connected to each indicator light. The main control module controls the corresponding indicator light to illuminate based on the field strength value.

10. The magnetic field strength measuring device according to claim 9, characterized in that, It also includes a light panel, on which each indicator light is mounted, and the light panel is positioned adjacent to the display module.

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