Fluxgate probe and fluxgate sensor
By using a U-shaped magnetic core and a hollow core skeleton in the flux gate probe, the processing and winding process of the flux gate probe is simplified, the problems of machining difficulties and high power consumption in the prior art are solved, and more efficient detection accuracy is achieved.
Patent Information
- Application Number
- CN202421657094.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-12
AI Technical Summary
The processing difficulties of existing flux gate probes, especially in winding and core processing, lead to large power consumption and high processing difficulties in equipment.
The core skeleton with a U-shaped core and a hollow structure is used, and the excitation coil and induction coil are wound on the U-shaped core and the core skeleton respectively. The square hollow structure and groove design are used to simplify the processing and winding process of the flux gate probe.
It realizes that the processing of the flux gate probe is more convenient, the winding is simple, which reduces the power consumption of the equipment and improves the accuracy of detection.
Smart Images
Figure CN222952481U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fluxgate sensors, in particular to a fluxgate probe and a fluxgate sensor. Background Art
[0002] The fluxgate sensor is a sensor that uses fluxgate technology to measure magnetic fields. It indicates the strength of the magnetic field by detecting the induced voltage generated by the change in the magnetic field. Compared with traditional magnetic induction sensors, fluxgate sensors have higher sensitivity, lower noise, wider measurement range and better linearity.
[0003] The design of the fluxgate sensor mainly includes a toroidal core, which significantly improves performance because it does not leave an air gap and uses a separate core to achieve the transformer effect. However, for the fluxgate of the toroidal core, the core processing of this structure is relatively difficult. If the core is thick enough to be wound directly on it, the power consumption of the sensor will be very large; if the core is very thin, a skeleton must be provided for the excitation coil, and the processing of the skeleton is also relatively difficult. At the same time, it is difficult to wind the excitation coil on the toroidal core.
[0004] Therefore, a new type of fluxgate probe is urgently needed. Utility Model Content
[0005] In view of the above analysis, the utility model aims to provide a fluxgate probe and a fluxgate sensor to solve the problem of difficulty in processing the fluxgate probe in the prior art.
[0006] The purpose of this utility model is mainly achieved through the following technical solutions:
[0007] The fluxgate probe comprises a U-shaped magnetic core, an excitation coil, an induction coil and a magnetic core skeleton;
[0008] The excitation coil is wound on the U-shaped magnetic core, and the induction coil is wound on the magnetic core skeleton; the magnetic core skeleton is a hollow structure; the hollow structure of the magnetic core skeleton is a square hollow structure;
[0009] The U-shaped magnetic core and the excitation coil are both arranged in the hollow structure of the magnetic core skeleton; a groove is contained inside the square hollow structure, and the groove is used to surround the U-shaped magnetic core.
[0010] Based on the further improvement of the above solution, the two open ends of the U-shaped magnetic core are inserted into the hollow structure of the magnetic core skeleton through one end of the magnetic core skeleton, and the U-shaped turning end of the U-shaped magnetic core is arranged outside the magnetic core skeleton.
[0011] Based on the further improvement of the above solution, the two signal input ends of the excitation coil are arranged at the U-shaped turning end of the U-shaped magnetic core, serving as the excitation signal input ends of the fluxgate probe.
[0012] Based on the further improvement of the above solution, the two signal output ends of the induction coil are arranged at the other end of the magnetic core skeleton, serving as the induction signal output ends of the fluxgate probe.
[0013] Based on the further improvement of the above solution, a magnetic core coil slot is opened on the U-shaped magnetic core, and the excitation coil is wound on the magnetic core coil slot.
[0014] Based on the further improvement of the above solution, a skeleton coil slot is provided on the magnetic core skeleton, and the induction coil is wound on the skeleton coil slot.
[0015] Based on the further improvement of the above solution, the wire diameter of the excitation coil is 0.13 mm, and the number of turns of the excitation coil is 3000;
[0016] The wire diameter of the induction coil is 0.22 mm, and the number of turns of the induction coil is 3500.
[0017] Based on the further improvement of the above solution, the U-shaped magnetic core has a thickness of 10 mm, a length of 30 mm, and a width of 20 mm.
[0018] Based on the further improvement of the above solution, the thickness of the magnetic core skeleton is 20 mm, the length is 40 mm, and the width is 25 mm.
[0019] A fluxgate sensor, comprising an excitation module and a digital processing module, and a fluxgate probe of the above solution;
[0020] The excitation module is connected to the excitation signal input end of the fluxgate probe, and the digital processing module is connected to the induction signal output end of the fluxgate probe.
[0021] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:
[0022] 1. The magnetic core of the fluxgate probe adopts a U-shaped magnetic core, on which an induction coil is wound. The U-shaped magnetic core is arranged inside the square hollow structure of the magnetic core skeleton, so that the fluxgate probe is easy to process and simple to wind;
[0023] 2. Combine the stability of the excitation frequency generated by the excitation module and the non-distortion of the excitation waveform to improve the accuracy of detection.
[0024] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the following content, and some advantages can be obvious from the description or understood by implementing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the contents specifically pointed out in the text and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. In the entire drawings, the same reference symbols represent the same components.
[0026] Figure 1 This is one of the structural schematic diagrams of a fluxgate probe provided by the utility model;
[0027] Figure 2 The second structural schematic diagram of a fluxgate probe provided by the utility model;
[0028] Figure 3 The present invention provides a schematic structural diagram of a fluxgate sensor.
[0029] Reference numerals:
[0030] 1-excitation coil; 2-U-shaped magnetic core; 3-induction coil; 4-magnetic core skeleton. DETAILED DESCRIPTION
[0031] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.
[0032] A specific embodiment of the utility model discloses a fluxgate probe, which comprises a U-shaped magnetic core 2, an excitation coil 1, an induction coil 3 and a magnetic core skeleton 4;
[0033] The excitation coil 1 is wound on the U-shaped magnetic core 2, and the induction coil 3 is wound on the magnetic core skeleton 4; the magnetic core skeleton 4 is a hollow structure; the hollow structure of the magnetic core skeleton 4 is a square hollow structure;
[0034] The U-shaped magnetic core 2 and the excitation coil 1 are both arranged in the hollow structure of the magnetic core skeleton 4 ; a groove is contained inside the square hollow structure, and the groove is used to surround the U-shaped magnetic core 2 .
[0035] Specifically, Figure 1 As shown, a U-shaped magnetic core 2 wound with an excitation coil 1 is arranged in a hollow structure of a magnetic core skeleton 4, and an induction coil 3 is wound on the magnetic core skeleton 4.
[0036] Specifically, Figure 2 As shown, the hollow structure of the magnetic core skeleton 4 is a square hollow structure, and a groove is contained inside the square hollow structure for surrounding the U-shaped magnetic core 2 .
[0037] It is worth noting that the U-shaped magnetic core 2 makes it easier to wind the excitation coil on the magnetic core. The U-shaped magnetic core is easier to process and when the U-shaped magnetic core reaches the saturation point, less heat is generated, thereby reducing power consumption.
[0038] Specifically, by accommodating grooves inside the square hollow structure, the alternating magnetic field generated by the excitation coil is evenly distributed inside the square hollow structure, so that the induction coil wound on the magnetic core frame 4 can detect the alternating magnetic field more accurately.
[0039] Specifically, Figure 1 As shown, the two open ends of the U-shaped magnetic core 2 are inserted into the hollow structure of the magnetic core skeleton 4 through one end of the magnetic core skeleton 4 , and the U-shaped turning end of the U-shaped magnetic core 2 is arranged outside the magnetic core skeleton 4 .
[0040] Specifically, Figure 1 As shown, the two signal input ends of the excitation coil 1 are arranged at the U-shaped turning end of the U-shaped magnetic core 2, serving as the excitation signal input ends of the fluxgate probe.
[0041] Specifically, Figure 1 As shown, the two signal output ends of the induction coil 1 are arranged at the other end of the magnetic core skeleton 4, serving as the induction signal output ends of the fluxgate probe.
[0042] When in use, the excitation signal is transmitted through the excitation signal input end of the fluxgate probe. The excitation coil provides an alternating magnetic field under the action of the excitation signal. When the intensity of the alternating magnetic field is large enough, the U-shaped magnetic core will reach a magnetic saturation state. At this time, the magnetization intensity of the U-shaped magnetic core no longer changes with the external magnetic field. When the U-shaped magnetic core reaches the saturation point, the induction coil will detect a signal, which is related to the magnetic saturation state of the U-shaped magnetic core. By adjusting the excitation signal, the U-shaped magnetic core oscillates between the positive and negative saturation points. The signal detected by the induction coil is output through the induction signal output end of the fluxgate. By measuring the output signal, the intensity of the external magnetic field is calculated.
[0043] Specifically, Figure 1 As shown, a magnetic core coil slot is opened on the U-shaped magnetic core, and the excitation coil is wound on the magnetic core coil slot.
[0044] Specifically, Figure 1 As shown, the magnetic core skeleton is provided with skeleton coil slots, and the induction coil is wound on the skeleton coil slots.
[0045] Specifically, the core coil slots and the skeleton coil slots can be reasonably arranged according to the sizes of the excitation coil and the induction coil.
[0046] Preferably, the wire diameter of the excitation coil is 0.13 mm, and the number of turns of the excitation coil is 3000;
[0047] The wire diameter of the induction coil is 0.22 mm, and the number of turns of the induction coil is 3500.
[0048] Specifically, the U-shaped magnetic core has a thickness of 10 mm, a length of 30 mm, and a width of 20 mm.
[0049] Specifically, the magnetic core skeleton has a thickness of 20 mm, a length of 40 mm, and a width of 25 mm.
[0050] Specifically, Figure 1 As shown, the length of the U-shaped core is the distance between the U-shaped turning end and the open end, the width of the U-shaped core is the distance between the two open ends, and the thickness of the U-shaped core is the thickness of the core column; the U-shaped core is placed horizontally on a horizontal plane, and the thickness is the dimension in the vertical direction along the horizontal plane.
[0051] Specifically, Figure 1 As shown in , the length of the core skeleton is the distance between the two ends of the core skeleton; Figure 2 As shown, the width of the magnetic core frame is the distance from the upper edge to the lower edge of the magnetic core frame in the vertical direction, and the thickness of the magnetic core frame is the length of the magnetic core frame from left to right in the horizontal direction.
[0052] It is worth noting that, by adjusting the parameters of the excitation coil, the induction coil, the U-shaped magnetic core and the magnetic core skeleton, the output induction signal can be made most stable.
[0053] Another specific embodiment of the utility model discloses a fluxgate sensor, such as Figure 3 As shown, the fluxgate sensor includes an excitation module and a digital processing module, as well as the above-mentioned fluxgate probe;
[0054] The excitation module is connected to the excitation signal input end of the fluxgate probe, and the digital processing module is connected to the induction signal output end of the fluxgate probe.
[0055] Specifically, the excitation module can use a single-chip microcomputer as the main control chip. When working, it generates a square wave signal with a duty cycle of 50%, which is input into the excitation coil as an excitation signal, so that the U-shaped magnetic core periodically changes between positive and negative saturation points, thereby outputting the induction signal through the induction signal output terminal, and finally using the digital processing module to obtain the strength of the external environmental magnetic field. The use of a digital processing module to process the induction signal to obtain the magnetic field strength can be achieved using existing technology. This application does not limit the digital processing module. Any digital processing module that can process the induction signal and obtain the magnetic field strength is within the protection scope of this application. The improvement of the fluxgate sensor protected by this application lies in the fluxgate probe.
[0056] Compared with the prior art, a fluxgate probe and a fluxgate sensor provided by an embodiment of the utility model adopt a U-shaped magnetic core as the magnetic core of the fluxgate probe, an induction coil is wound on the U-shaped magnetic core, and the U-shaped magnetic core is arranged inside the square hollow structure of the magnetic core skeleton, so that the fluxgate probe is easy to process and the winding is simple; at the same time, the stability of the excitation frequency generated by the excitation module and the non-distortion of the excitation waveform are combined to improve the accuracy of detection.
[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.
Claims
1. A fluxgate probe, characterized in that: The fluxgate probe comprises a U-shaped magnetic core, an excitation coil, an induction coil and a magnetic core skeleton; The excitation coil is wound on the U-shaped magnetic core, and the induction coil is wound on the magnetic core skeleton; the magnetic core skeleton is a hollow structure; the hollow structure of the magnetic core skeleton is a square hollow structure; The U-shaped magnetic core and the excitation coil are both arranged in the hollow structure of the magnetic core skeleton; a groove is contained inside the square hollow structure, and the groove is used to surround the U-shaped magnetic core.
2. The fluxgate probe according to claim 1, characterized in that: The two open ends of the U-shaped magnetic core are inserted into the hollow structure of the magnetic core frame through one end of the magnetic core frame, and the U-shaped turning end of the U-shaped magnetic core is arranged outside the magnetic core frame.
3. The fluxgate probe according to claim 2, characterized in that: The two signal input ends of the excitation coil are arranged at the U-shaped turning end of the U-shaped magnetic core, serving as the excitation signal input ends of the fluxgate probe.
4. The fluxgate probe according to claim 2, characterized in that: The two signal output ends of the induction coil are arranged at the other end of the magnetic core skeleton, serving as the induction signal output ends of the fluxgate probe.
5. The fluxgate probe according to claim 1, characterized in that: The U-shaped magnetic core is provided with a magnetic core coil slot, and the excitation coil is wound on the magnetic core coil slot.
6. The fluxgate probe according to claim 1, characterized in that: The magnetic core skeleton is provided with skeleton coil slots, and the induction coil is wound on the skeleton coil slots.
7. The fluxgate probe according to claim 1, characterized in that: The wire diameter of the excitation coil is 0.13 mm, and the number of turns of the excitation coil is 3000; The wire diameter of the induction coil is 0.22 mm, and the number of turns of the induction coil is 3500.
8. The fluxgate probe according to claim 7, characterized in that: The U-shaped magnetic core has a thickness of 10 mm, a length of 30 mm, and a width of 20 mm.
9. The fluxgate probe according to claim 8, characterized in that: The magnetic core skeleton has a thickness of 20 mm, a length of 40 mm and a width of 25 mm.
10. A fluxgate sensor, characterized in that: The fluxgate sensor comprises an excitation module and a digital processing module, and a fluxgate probe according to any one of claims 1 to 9; The excitation module is connected to the excitation signal input end of the fluxgate probe, and the digital processing module is connected to the induction signal output end of the fluxgate probe.