Wireless self-powered measurement device and system for power frequency electromagnetic field measurements

Abstract

This application provides a wireless self-powered measurement device and system for power frequency electromagnetic field measurement, comprising: a base, a first coupling coil, a second coupling coil, a third coupling coil, an antenna disk, a support rod, and a power frequency electric field sensor. The base is an isosceles triangular chassis, with the first, second, and third coupling coils respectively mounted at the three corners for energy pickup and signal measurement. The three coupling coils are fixed together at the top and connected to the antenna disk, which is a disc-shaped box containing an antenna module and circuitry. The antenna module is connected to the circuitry, which in turn connects to the first, second, and third coupling coils and the power frequency electric field sensor. A support rod is mounted on top of the box, with the power frequency electric field sensor mounted at its top. This application extends the distance between the multiple coupling coils, reducing interference between the various measurement subsystems. Simultaneous energy pickup and signal measurement by the coupling coils reduces battery maintenance costs and improves deployment flexibility.

Description

Technical Field

[0001] This application claims protection for an electromagnetic measuring device, and more particularly relates to a wireless self-powered measuring device for measuring power frequency electromagnetic fields. This application also relates to a wireless self-powered measuring system for measuring power frequency electromagnetic fields. Background Technology

[0002] Key nodes in a power system typically contain a variety of important power equipment. Real-time monitoring of the operating status of these important power equipment is of great significance for improving the stability and security of the power system.

[0003] Patent CN111579882B discloses a power frequency electromagnetic field probe, a power line inspection drone navigation device, and a method for monitoring the operating status of important power equipment. The technical solution describes a probe mounted on a drone used for inspecting AC power lines. The probe is cuboid in shape, with a magnetic field sensor on its first side and electric field sensors on its four adjacent sides. A processing module is located inside the probe. During the drone's rotation during inspection, the magnetic field sensor measures the power frequency magnetic field strength at the location of the first side. During the drone's flight, the electric field sensors measure the power frequency electric field strength at the locations of the four adjacent sides. The processing module sends the power frequency magnetic field and electric field strength values ​​to the drone's control module, enabling the control module to determine the direction of the AC power line and the drone's position relative to it. However, the cuboid shape of the probe leads to close proximity between the measurement subsystems, which can easily cause interference. Summary of the Invention

[0004] To address one or more of the technical problems described above, this application provides a wireless self-powered measuring device for power frequency electromagnetic field measurement. This application also relates to a wireless self-powered measuring system for power frequency electromagnetic field measurement.

[0005] This application provides a wireless self-powered measuring device for measuring power frequency electromagnetic fields, comprising: a base, a first coupling coil, a second coupling coil, a third coupling coil, an antenna disk, a support rod, and a power frequency electric field sensor;

[0006] The base is an isosceles triangular chassis, with a first coupling coil, a second coupling coil, and a third coupling coil installed at the three corners of the chassis for energy pickup and signal measurement, respectively. The three coupling coils are fixed together at the top and then connected to an antenna disk, which is a disc-shaped box containing an antenna module and circuitry. The antenna module is connected to the circuitry, which in turn connects the first coupling coil, the second coupling coil, the third coupling coil, and a power frequency electric field sensor. A support rod is provided on the top of the box, and the power frequency electric field sensor is installed at the top of the support rod.

[0007] Optionally, the circuit includes: a three-dimensional magnetic field measurement module, a three-dimensional electric field measurement module, a control module, a wireless module, and a power supply module;

[0008] The three-dimensional magnetic field measurement module is used to measure the magnitude of the magnetic field;

[0009] The three-dimensional electric field measurement module is used to measure the magnitude of the electric field;

[0010] The control module is used to control the working status of each module, including starting and stopping work;

[0011] The wireless module is used to transmit data;

[0012] The power module is used to supply power to each module;

[0013] The first coupling coil, the second coupling coil, and the third coupling coil are connected to the three-dimensional magnetic field measurement module. The power frequency electric field sensor is connected to the three-dimensional electric field measurement module. The three-dimensional magnetic field measurement module, the three-dimensional electric field measurement module, and the wireless module are connected to the control module. The three-dimensional magnetic field measurement module, the three-dimensional electric field measurement module, the control module, and the wireless module are connected to the power supply module.

[0014] Optionally, the coupling coil includes: a support frame, a magnetic core, and a coil;

[0015] The support frame serves as a support for the coupling coil and is mounted on the base;

[0016] The magnetic core is located inside the support frame, and the coil is wound around the outer surface of the support frame.

[0017] Optionally, the support frame is made of nylon and has a cylindrical shape. A blind hole is provided at the end away from the chassis, which is used to install the magnetic core.

[0018] Optionally, the material of the magnetic core is permalloy.

[0019] Optionally, the power frequency electric field sensor is a sphere composed of an upper spherical surface, a lower spherical surface, a front spherical surface, a rear spherical surface, a left spherical surface, and a right spherical surface, and is connected to the antenna disk by an insulating support rod;

[0020] The power frequency electric field sensor includes a first electrode, a second electrode, and a third electrode. The first electrode includes the upper and lower spherical surfaces of the sphere, the second electrode includes the front and rear spherical surfaces of the sphere, and the third electrode includes the left and right spherical surfaces of the sphere.

[0021] Optionally, when one of the spherical surfaces of the second electrode is the main viewing direction, the line connecting the centers of the upper and lower spherical surfaces is vertical, the line connecting the centers of the front and rear spherical surfaces is horizontal, and the line connecting the centers of the left and right spherical surfaces is vertical.

[0022] Optionally, the antenna module includes a ZigBee communication unit.

[0023] This application also provides a wireless self-powered measurement system for power frequency electromagnetic field measurement, including: a coordinator, a host computer, and the wireless self-powered measurement device for power frequency electromagnetic field measurement described in several claims.

[0024] Multiple wireless self-powered measuring devices for power frequency electromagnetic field measurement are connected to a host computer via the coordinator.

[0025] Optionally, the wireless self-powered measuring device for measuring power frequency electromagnetic fields transmits data wirelessly to the coordinator, while the coordinator transmits data to the host computer via a wired connection.

[0026] The advantages of this application compared to the prior art are:

[0027] This application provides a wireless self-powered measuring device for measuring power frequency electromagnetic fields, comprising: a base, a first coupling coil, a second coupling coil, a third coupling coil, an antenna disk, a support rod, and a power frequency electric field sensor. The base is an isosceles triangular chassis, with the first, second, and third coupling coils respectively mounted at the three corners for energy pickup and signal measurement. The three coupling coils are fixed together at the top and connected to the antenna disk, which is a disc-shaped box containing an antenna module and circuitry. The antenna module is connected to the circuitry, which in turn connects to the first, second, and third coupling coils and the power frequency electric field sensor. A support rod is mounted on the top of the box, with the power frequency electric field sensor mounted at its top. This application uses a triangular chassis to increase the distance between multiple coupling coils, reducing interference between the various measurement subsystems. Simultaneously, the coupling coils perform energy pickup and signal measurement, reducing battery maintenance costs and improving deployment flexibility. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the wireless self-powered measuring device for measuring power frequency electromagnetic fields in this application.

[0029] Figure 2 This is a schematic diagram of the circuit structure in this application.

[0030] Figure 3 This is a cross-sectional view of a single coupled coil structure in this application.

[0031] Figure 4This is a schematic diagram of the power module in this application.

[0032] Figure 5 This is a schematic diagram of the power frequency electric field sensor structure in this application.

[0033] Figure 6 This is a schematic diagram of the wireless self-powered measurement system used for power frequency electromagnetic field measurement in this application. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] In the description of the embodiments of the present invention, it should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0037] The following are examples of specific implementation processes provided to illustrate the technical solutions to be protected in this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can implement this application by different technical means under the guidance of the concept of this application. Therefore, this application is not limited to the specific embodiments below.

[0038] This application provides a wireless self-powered measuring device for measuring power frequency electromagnetic fields, comprising: a base, a first coupling coil, a second coupling coil, a third coupling coil, an antenna disk, a support rod, and a power frequency electric field sensor.

[0039] The base is an isosceles triangular chassis, with a first coupling coil, a second coupling coil, and a third coupling coil installed at the three corners of the chassis, respectively, for energy pickup and signal measurement.

[0040] The three coupling coils are fixed together at the top and then connected to an antenna disk. The antenna disk is a disc-shaped box with an antenna module and circuit inside. The antenna module is connected to the circuit, and the circuit is connected to the first coupling coil, the second coupling coil, the third coupling coil, and the power frequency electric field sensor.

[0041] A support rod is provided on the top of the box, and the power frequency electric field sensor is installed at the top of the support rod.

[0042] This application utilizes a triangular chassis to increase the distance between multiple coupling coils, reducing interference between the various measurement subsystems. Simultaneously, the coupling coils perform energy pickup and signal measurement, reducing battery maintenance costs and improving deployment flexibility.

[0043] Figure 1 This is a schematic diagram of the wireless self-powered measuring device for measuring power frequency electromagnetic fields in this application.

[0044] Please refer to Figure 1 As shown, the wireless self-powered measuring device for power frequency electromagnetic field measurement can detect electric and magnetic fields without the need for a dedicated power supply. Furthermore, it optimizes the detection results and reduces interference between subsystems through separate detection subsystems.

[0045] The base 101 of the device is triangular, and in this application, the triangle is set as an isosceles triangle. The base 101 can be set as a triangular plane or a triangular frame structure, and each corner of the base 101 is rounded.

[0046] The base 101 is provided with a first coupling coil 102, a second coupling coil 103 and a third coupling coil 104. The lengths of the first coupling coil 102, the second coupling coil 103 and the third coupling coil 104 are set to be equal. The first coupling coil 102, the second coupling coil 103 and the third coupling coil 104 are perpendicular to each other and form an equilateral triangular pyramid.

[0047] Each rounded corner on the base 101 is an elliptical arc, forming an elliptical arc of the same size as the oblique surface on the cylindrical body of the first coupling coil 102, the second coupling coil 103, or the third coupling coil 104. The ellipses formed by the oblique surfaces on the first coupling coil 102, the second coupling coil 103, and the third coupling coil 104 are of the same size.

[0048] In this application, the first coupling coil 102, the second coupling coil 103, and the third coupling coil 104 are of equal length. The first coupling coil 102, the second coupling coil 103, and the third coupling coil 104 have the same structure, including a coil, a magnetic core 302, and a support frame 301.

[0049] Figure 3 This is a cross-sectional view of the structure of a single coupling coil 303 in this application.

[0050] Please refer to Figure 3 As shown, the magnetic core 302 and the support frame 301 are fitted together. The support frame 301 is a semi-hollow circular tube with a blind hole at one end away from the chassis. This blind hole is used to install the magnetic core, meaning the magnetic core 302 is embedded in the cavity of the hollow circular tube. The coil is wound around the support frame and completely covers the magnetic core 302.

[0051] Preferably, the support frame 301 is made of nylon, the magnetic core 302 is made of permalloy, and the coil is made of enameled wire.

[0052] The first coupling coil 102, the second coupling coil 103 and the third coupling coil 104 are perpendicular to each other and connected at the top, together with the base 101 in the shape of an equilateral triangular pyramid.

[0053] An antenna disk 107 is fixedly connected at the connection point of the first coupling coil 102, the second coupling coil 103 and the third coupling coil 104. The antenna disk 107 is a disc-shaped structure and contains a circuit 201 and an antenna module 105.

[0054] Figure 2 This is a schematic diagram of the circuit 201 structure in this application.

[0055] Please refer to Figure 2 As shown, the circuit 201 includes a three-dimensional magnetic field measurement module 2011, a three-dimensional electric field measurement module 2012, a power supply module 2013, a control system 2015, and a wireless communication module 2014. The three-dimensional magnetic field measurement module, the three-dimensional electric field measurement module, and the wireless module are connected to the control module, and the three-dimensional magnetic field measurement module, the three-dimensional electric field measurement module, the control module, and the wireless module are connected to the power supply module.

[0056] The three-dimensional magnetic field measurement module 2011 is used to connect the first coupling coil 102, the second coupling coil 103, and the third coupling coil 104 to measure the scattered magnetic field. The three-dimensional electric field measurement module 2012 is connected to the power frequency electric field sensor 108 to measure the three-dimensional electric field.

[0057] The control system 2015 is used to control the three-dimensional electric field measurement module 2012, the three-dimensional magnetic field measurement module 2011, the power supply module 2013 and the wireless communication module 2014. The power supply module 2013 is used to supply power, and the wireless communication module 2014 is used to transmit data with the host computer.

[0058] The antenna module 105 is connected to the wireless communication module 2014 and is used to receive and / or transmit signals.

[0059] Preferably, the wireless communication module 2014 includes: a ZigBee protocol module, a low-power local area network protocol based on the IEEE 802.15.4 standard, used for short-range, low-speed wireless network technology.

[0060] Figure 4 This is a schematic diagram of the power module 2013 in this application.

[0061] Please refer to Figure 4 As shown, the power module is used to extract energy from the electromagnetic field environment and supply energy to various modules. The power module 2013 is connected to the first coupling coil 102, the second coupling coil 103 and the third coupling coil 104. These coupling coils sense the changes in the electromagnetic field in the scene and can generate current. This current passes through the charge pump 401 of the circuit, and then continues to be connected to the DC voltage regulator circuit 402 and the diode to generate electrical energy that can be used to supply energy to the load circuit 404.

[0062] Specifically, the voltage obtained by each set of coupling coils through electromagnetic induction is first boosted and rectified by the charge pump 401, and then the voltage signal output by the charge pump 401 is output as a 5V DC voltage by the DC voltage regulator circuit 402. The voltage output terminal is connected to the diode 403 to prevent the small difference in the parallel output voltage from causing the power supplies to charge each other, thereby realizing the superposition of the output current of all power supplies and increasing the output current of the wireless self-powered power supply.

[0063] In this application, the power module 2013 provides power to the three-dimensional magnetic field measurement module 2011, the three-dimensional electric field measurement module 2012, the control system 2015, and the wireless communication module 2014.

[0064] On the top of the antenna disk 107, a power frequency electric field sensor 108 is connected via a support column 106. The power frequency electric field sensor 108 is connected to the three-dimensional electric field measurement module 2012.

[0065] Figure 5 This is a schematic diagram of the structure of the power frequency electric field sensor 108 in this application.

[0066] Please refer to Figure 5 As shown, the power frequency electric field sensor 108 includes three sets of electrodes, namely a first electrode 501, a second electrode 502 and a third electrode 503. The first electrode 501, the second electrode 502 and the third electrode 503 are each composed of two opposing metal surfaces, and the opposing metal sheets can be regarded as a capacitor.

[0067] The first electrode 501 includes the upper and lower spherical surfaces of the sphere, the second electrode 502 includes the front and rear spherical surfaces of the sphere, and the third electrode 503 includes the left and right spherical surfaces of the sphere.

[0068] In this configuration, with one spherical surface of the second electrode 502 as the primary viewing direction, the line connecting the centers of the upper and lower spherical surfaces is vertical, the line connecting the centers of the front and rear spherical surfaces is horizontal, and the line connecting the centers of the left and right spherical surfaces is vertical. The six surfaces of the first electrode 501, the second electrode 502, and the third electrode 503 form a metal spherical shell. Each surface does not contact adjacent surfaces, and gaps are provided between adjacent surfaces. The electrodes are preferably made of copper.

[0069] The first electrode 501, the second electrode 502 and the third electrode 503 are respectively connected to the corresponding signal conversion unit, and the detected signal is output to the three-dimensional electric field measurement module 2012 connected to the signal conversion unit.

[0070] This application also provides a wireless self-powered measurement system for power frequency electromagnetic field measurement, comprising: multiple wireless self-powered measurement devices for power frequency electromagnetic field measurement as described above, as well as a coordinator and a host computer.

[0071] Figure 6 This is a schematic diagram of the wireless self-powered measurement system used for power frequency electromagnetic field measurement in this application.

[0072] Specifically, the wireless self-powered measuring device 601 for measuring power frequency electromagnetic fields can detect electric and magnetic fields without the need for a dedicated power supply, and optimizes the detection results and reduces interference between subsystems through separate detection subsystems.

[0073] Multiple wireless self-powered measuring devices 601 for power frequency electromagnetic field measurement constitute a measurement system for assessing environmental power frequency electromagnetic fields. Each wireless self-powered measuring device has a built-in communication module (ZigBee communication module) for wireless communication with a coordinator. The coordinator then transmits data via an RS232 cable to a host computer.

[0074] The communication system within the wireless self-powered measuring device 601 for power frequency electromagnetic field measurement is based on the ZigBee protocol. This device can operate independently to measure a critical point in a power system, particularly for measuring power frequency electromagnetic fields in substations.

[0075] 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A wireless self-powered measuring device for measuring power frequency electromagnetic fields, characterized in that, include: The system includes a base, a first coupling coil, a second coupling coil, a third coupling coil, an antenna disk, a support rod, and a power frequency electric field sensor. The base is an isosceles triangular chassis, with a first coupling coil, a second coupling coil, and a third coupling coil installed at the three corners of the chassis, respectively, for energy pickup and signal measurement; After the three coupling coils are fixed together at the top, they are connected to the antenna disk. The antenna disk is a disc-shaped box with an antenna module and circuit inside. The antenna module is connected to the circuit, and the circuit is connected to the first coupling coil, the second coupling coil, the third coupling coil, and the power frequency electric field sensor. A support rod is provided on the top of the box, and the power frequency electric field sensor is installed at the top of the support rod; The first coupling coil, the second coupling coil, and the third coupling coil are perpendicular to each other and are fixedly connected at the top, forming an equilateral triangular pyramid structure together with the base. The circuit includes a power module, which is connected to the first coupling coil, the second coupling coil and the third coupling coil respectively, for inductively obtaining electrical energy from each coupling coil; the power module includes an energy harvesting circuit corresponding to each coupling coil, and each energy harvesting circuit has a diode connected in series at its DC voltage output terminal, and they are connected in parallel to achieve superposition of output current and prevent the power supplies from charging each other.

2. The wireless self-powered measuring device for power frequency electromagnetic field measurement according to claim 1, characterized in that, The circuit includes: Three-dimensional magnetic field measurement module, three-dimensional electric field measurement module, control module, wireless module and power supply module; The three-dimensional magnetic field measurement module is used to measure the magnitude of the magnetic field; The three-dimensional electric field measurement module is used to measure the magnitude of the electric field; The control module is used to control the working status of each module, including starting and stopping work; The wireless module is used to transmit data; The power module is used to supply power to each module; The first coupling coil, the second coupling coil, and the third coupling coil are connected to the three-dimensional magnetic field measurement module. The power frequency electric field sensor is connected to the three-dimensional electric field measurement module. The three-dimensional magnetic field measurement module, the three-dimensional electric field measurement module, and the wireless module are connected to the control module. The three-dimensional magnetic field measurement module, the three-dimensional electric field measurement module, the control module, and the wireless module are connected to the power supply module.

3. The wireless, self-powered measurement device for power frequency electromagnetic field measurements of claim 1, wherein, The coupling coil includes: Support frame, magnetic core, and coil; The support frame serves as a support for the coupling coil and is mounted on the base; The magnetic core is located inside the support frame, and the coil is wound around the outer surface of the support frame.

4. The wireless, self-powered measurement device for power frequency electromagnetic field measurements of claim 3, wherein, The support frame is made of nylon and has a cylindrical shape. A blind hole is set at the end away from the chassis, which is used to install the magnetic core.

5. The wireless, self-powered measurement device for power frequency electromagnetic field measurements of claim 3, wherein, The magnetic core is made of permalloy.

6. The wireless self-powered measuring device for power frequency electromagnetic field measurement according to claim 1, characterized in that, The power frequency electric field sensor is a sphere composed of an upper spherical surface, a lower spherical surface, a front spherical surface, a rear spherical surface, a left spherical surface, and a right spherical surface, and is connected to the antenna disk by an insulating support rod; The power frequency electric field sensor includes: The first electrode comprises an upper spherical surface and a lower spherical surface, the second electrode comprises a front spherical surface and a rear spherical surface, and the third electrode comprises a left spherical surface and a right spherical surface.

7. The wireless self-powered measuring device for power frequency electromagnetic field measurement according to claim 6, characterized in that, When the main viewing direction is one of the spherical surfaces of the second electrode, the line connecting the centers of the upper and lower spherical surfaces is vertical, the line connecting the centers of the front and rear spherical surfaces is horizontal, and the line connecting the centers of the left and right spherical surfaces is vertical.

8. The wireless self-powered measuring device for power frequency electromagnetic field measurement according to claim 1, characterized in that, The antenna module includes a ZigBee communication unit.

9. A wireless self-powered measurement system for power frequency electromagnetic field measurements, characterized by include: The coordinator, the host computer, and the wireless self-powered measuring device for measuring power frequency electromagnetic fields as described in any of claims 1 to 8; Multiple wireless self-powered measuring devices for power frequency electromagnetic field measurement are connected to a host computer via the coordinator.

10. The wireless, self-powered measurement system for power frequency electromagnetic field measurements of claim 9, wherein, The wireless self-powered measuring device for measuring power frequency electromagnetic fields transmits data wirelessly to the coordinator, while the coordinator transmits data to the host computer via a wired connection.

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