CN219915764U - Clamp head structure with bandwidth reaching 100kHz measuring frequency - Google Patents
Clamp head structure with bandwidth reaching 100kHz measuring frequency Download PDFInfo
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- CN219915764U CN219915764U CN202321281101.1U CN202321281101U CN219915764U CN 219915764 U CN219915764 U CN 219915764U CN 202321281101 U CN202321281101 U CN 202321281101U CN 219915764 U CN219915764 U CN 219915764U
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- iron core
- detection chip
- half shell
- 100khz
- clamp head
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000001514 detection method Methods 0.000 claims abstract description 43
- 238000005452 bending Methods 0.000 claims abstract description 36
- 238000005259 measurement Methods 0.000 claims description 7
- 229910000889 permalloy Inorganic materials 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 4
- 230000006698 induction Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 239000000306 component Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
The utility model belongs to the technical field of clamp meters, and particularly relates to a clamp head structure with a bandwidth reaching 100kHz measuring frequency, which comprises the following components: the shell comprises a first half shell and a second half shell which are movably connected; the iron core assembly comprises a first iron core and a second iron core, the first iron core is arranged on the first half shell, and the second iron core is arranged on the second half shell; the Hall assembly comprises a flexible circuit board, a first detection chip and a second detection chip, wherein the flexible circuit board is connected with the first iron core, the flexible circuit board is bent to form a first bending part and a second bending part, the first bending part and the second bending part face towards the second iron core, the first detection chip is electrically connected with the first bending part, the second detection chip is electrically connected with the second bending part, and the model of the first detection chip and the second detection chip is MLX91208. The clamp head structure can realize rapid tracking of the change of current waveforms through the first detection chip and the second detection chip of the Hall assembly.
Description
Technical Field
The utility model relates to the technical field of clamp meters, in particular to a clamp head structure with a bandwidth reaching 100kHz measuring frequency.
Background
The current sensor in the clamp ammeter is also called a clamp head and is a key component of the clamp ammeter.
In the related art, the clamp head structure generally comprises an iron core and a hall element, but a common hall element is difficult to meet the measurement frequency with the bandwidth of 100kHz, and is difficult to realize high-speed, high-precision and high-current measurement.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
In view of at least one of the above technical problems, the present utility model provides a clamp head structure with a bandwidth up to 100kHz, which solves the problems that in the related art, the clamp head structure generally comprises an iron core and a hall element, and a common hall element is difficult to meet the measurement frequency with the bandwidth of 100kHz, and is difficult to realize high-speed, high-precision and high-current measurement.
The embodiment of the utility model provides a clamp head structure with a bandwidth reaching 100kHz measuring frequency, which comprises the following components:
the shell comprises a first half shell and a second half shell which are movably connected;
the iron core assembly comprises a first iron core and a second iron core, the first iron core is arranged on the first half shell, and the second iron core is arranged on the second half shell;
the Hall assembly comprises a flexible circuit board, a first detection chip and a second detection chip, wherein the flexible circuit board is connected with the first iron core, the flexible circuit board is bent to form a first bending part and a second bending part, the first bending part and the second bending part face towards the second iron core, the first detection chip is electrically connected with the first bending part, the second detection chip is electrically connected with the second bending part, and the model of the first detection chip and the second detection chip is MLX91208.
The embodiment of the utility model has the following technical effects: the clamp head structure detects magnetic induction intensity generated by current of a target to be detected through the first detection chip and the second detection chip of the Hall assembly, provides high-speed analog signal output, has response time of 3 mu s and bandwidth of 100kHz, and thus realizes rapid tracking of change of current waveforms.
In one implementation, the first core and the second core are permalloy members.
In one implementation, the flexible circuit board includes a body and a connecting portion, the body is bonded to the first core, the first bending portion, the second bending portion and the connecting portion are respectively connected to the body, the root of the connecting portion is bonded to the first half shell, and the end portion of the connecting portion extends out from the first half shell.
In one implementation mode, the first half shell is provided with a first accommodating cavity, at least two first supporting ribs are distributed on the cavity wall of the first accommodating cavity at intervals, the first supporting ribs are provided with first accommodating grooves, and the first iron core is located in the first accommodating grooves.
In one implementation, the notch of the first receiving slot is provided with a chamfer structure.
In one implementation, the second half shell is provided with a second accommodating cavity, at least two second supporting ribs are distributed on the cavity wall of the second accommodating cavity at intervals, second accommodating grooves are formed in the second supporting ribs, and the second iron cores are located in the second accommodating grooves.
In one implementation, the notch of the second receiving slot is provided with a chamfer structure.
In one implementation mode, a positioning piece is arranged at one end, close to the first half shell, of the cavity wall of the second accommodating cavity, a positioning groove is formed in the positioning piece, and the second iron core is located in the positioning groove.
The utility model will be further described with reference to the drawings and examples.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following description will briefly explain the embodiments or the drawings needed in the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present utility model and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a clamp head structure according to an embodiment of the present utility model;
FIG. 2 is a front view of a clamp head structure provided by an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a flexible circuit board according to an embodiment of the present utility model;
FIG. 4 is a schematic view of a housing according to an embodiment of the present utility model;
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.
In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.
In the related art, the clamp head structure generally comprises an iron core and a hall element, but a common hall element is difficult to meet the measurement frequency with the bandwidth of 100kHz, and is difficult to realize high-speed, high-precision and high-current measurement. The clamp head structure detects magnetic induction intensity generated by current of a target to be detected through the first detection chip and the second detection chip of the Hall assembly, provides high-speed analog signal output, has response time of 3 mu s and bandwidth of 100kHz, and thus realizes rapid tracking of change of current waveforms.
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, fig. 1 is a schematic structural diagram of a clamp head structure according to an embodiment of the utility model; FIG. 2 is a front view of a clamp head structure provided by an embodiment of the present utility model; fig. 3 is a schematic structural diagram of a flexible circuit board according to an embodiment of the present utility model; FIG. 4 is a schematic view of a housing according to an embodiment of the present utility model; the embodiment of the utility model provides a clamp head structure with a bandwidth reaching 100kHz measuring frequency, which comprises a shell 100, an iron core assembly 200 and a Hall assembly 300.
As shown in fig. 1 to 4, a detailed description of a specific structure of the binding clip structure is provided below.
The shell 100 comprises a first half shell 110 and a second half shell 120 which are movably connected; the iron core assembly 200 includes a first iron core 210 and a second iron core 220, the first iron core 210 is disposed on the first half shell 110, and the second iron core 220 is disposed on the second half shell 120; the hall assembly 300 comprises a flexible circuit board 310, a first detection chip 320 and a second detection chip 330, wherein the flexible circuit board 310 is connected with the first iron core 210, the flexible circuit board 310 is bent to form a first bending part 311 and a second bending part 312, the first bending part 311 and the second bending part 312 face the second iron core 220, the first detection chip 320 is electrically connected with the first bending part 311, the second detection chip 330 is electrically connected with the second bending part 312, and the types of the first detection chip 320 and the second detection chip 330 are MLX91208.
It should be noted that the first half shell 110 is hinged to the second half shell 120, so that the second half shell 120 can rotate relative to the first half shell 110, and thus, a target to be tested can enter the clamp head structure, and detection is convenient.
In addition, in order to ensure that the first detection chip 320 and the second detection chip 330 can detect the magnetic field generated by the current of the target to be detected, the flexible circuit board 310 is further bent to form a first bending portion 311 and a second bending portion 312, the first detection chip 320 is electrically connected with the first bending portion 311, and the second detection chip 330 is electrically connected with the second bending portion 312, so that when the target to be detected enters the clamp structure during detection, the first detection chip 320 and the second detection chip 330 can cut the magnetic field generated by the current of the target to be detected, and then detect the magnetic induction intensity.
The model of the first detection chip 320 and the second detection chip 330 is MLX91208, the MLX91208 is a programmable current detection chip, and the current detection chip is packaged by adopting standard SO-8, SO that the current detection chip has extremely high sensitivity. The MLX91208 can detect the magnetic induction intensity parallel to the chip surface generated by the current of the object to be detected, and provide high-speed analog signal output, the response time can reach 3 mu s, and the bandwidth reaches 100kHz. When the iron core component 200 of the clamp head structure clamps a target to be detected, the MLX91208 converts a magnetic field into a high-speed voltage analog signal to be output, the high-speed voltage analog signal is output through an amplifier according to the output ratio of 100mV/A, and the change of a current waveform can be quickly tracked through the BNC conversion head connected with an oscilloscope.
In some examples, as shown in fig. 1-4, the first core 210 and the second core 220 are permalloy members. In this way, the first and second cores 210 and 220 can increase the magnetic field strength of the object to be measured.
In some examples, as shown in fig. 1 to 4, the flexible circuit board 310 includes a body 313 and a connection portion 314, the body 313 is adhered to the first core 210, the first bending portion 311, the second bending portion 312 and the connection portion 314 are respectively connected to the body 313, the root portion of the connection portion 314 is adhered to the first half shell 110, and the end portion of the connection portion 314 protrudes from the first half shell 110.
In order to improve the connection firmness between the flexible circuit board 310 and the first half shell 110, at least a portion of the connecting portion 314 is folded, so that the connecting portion 314 is parallel to the inner wall of the first half shell 110, then the connecting portion 314 is bonded to the inner wall of the first half shell 110, so that the connection stability between the flexible circuit board 310 and the first half shell 110 is improved, and the situation that the flexible circuit board 310 is not easy to shift in the process of using the clamp meter is ensured.
It should be noted that the body 313, the connecting portion 314, the first bending portion 311 and the second bending portion 312 are integrally formed.
In some examples, as shown in fig. 1 to 4, the first half shell 110 has a first accommodating cavity 111, at least two first supporting ribs 112 are distributed on a cavity wall of the first accommodating cavity 111 at intervals, a first accommodating groove 113 is formed in the first supporting rib 112, and the first iron core 210 is located in the first accommodating groove 113.
Specifically, the number of the first support ribs 112 is three, and the three first support ribs 112 cooperate to support and fix the first iron core 210, so that the position of the first iron core 210 in the first half shell 110 is fixed.
In some examples, as shown in fig. 1 to 4, the notch of the first receiving groove 113 is provided with a chamfer structure. Thus, the first iron core 210 is conveniently inserted into the first accommodating groove 113 through the chamfer structure, and the surface of the first iron core 210 is not easy to wear.
In some examples, as shown in fig. 1 to 4, the second half shell 120 has a second accommodating cavity 121, at least two second supporting ribs 122 are spaced apart from a cavity wall of the second accommodating cavity 121, the second supporting ribs 122 are provided with second accommodating grooves 123, and the second iron core 220 is located in the second accommodating grooves 123.
Specifically, the number of the second supporting ribs 122 is three, and the three second supporting ribs cooperate to support and fix the second core 220 such that the second core 220 is fixed in position in the second half-shell 120.
In some examples, as shown in fig. 1 to 4, the notch of the second receiving groove 123 is provided with a chamfer structure. Thus, the second iron core 220 is conveniently inserted into the second accommodating groove 123 through the chamfer structure, and the surface of the second iron core 220 is not easily worn.
In some examples, as shown in fig. 1 to 4, a positioning member 124 is disposed at an end of the cavity wall of the second accommodating cavity 121 near the first half shell 110, the positioning member 124 is provided with a positioning slot 125, and the second iron core 220 is located in the positioning slot 125.
Specifically, the number of the positioning members 124 may be one or two, and the second iron core 220 is fixed on the second half shell 120 through the positioning members 124, so as to improve the connection stability between the second iron core 220 and the second half shell 120, and make the second iron core 220 not easy to shake and shift when the second half shell 120 rotates.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above is merely a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present utility model or modifications to equivalent embodiments using the methods and technical contents disclosed above, without departing from the scope of the technical solution of the present utility model. Therefore, all equivalent changes according to the shape, structure and principle of the present utility model are covered in the protection scope of the present utility model.
Claims (8)
1. A clamp head structure with a bandwidth up to 100kHz measurement frequency, comprising:
the shell comprises a first half shell and a second half shell which are movably connected;
the iron core assembly comprises a first iron core and a second iron core, the first iron core is arranged on the first half shell, and the second iron core is arranged on the second half shell;
the Hall assembly comprises a flexible circuit board, a first detection chip and a second detection chip, wherein the flexible circuit board is connected with the first iron core, the flexible circuit board is bent to form a first bending part and a second bending part, the first bending part and the second bending part are both oriented to the second iron core, the first detection chip is electrically connected with the first bending part, the second detection chip is electrically connected with the second bending part, and the model of the first detection chip and the second detection chip is MLX91208.
2. The clamp head structure with the bandwidth reaching 100kHz measuring frequency as recited in claim 1, wherein the first iron core and the second iron core are permalloy members.
3. The clamp head structure with the bandwidth reaching 100kHz measuring frequency according to claim 1, wherein the flexible circuit board comprises a body and a connecting portion, the body is bonded with the first iron core, the first bending portion, the second bending portion and the connecting portion are respectively connected with the body, the root of the connecting portion is bonded with the first half shell, and the end portion of the connecting portion extends out of the first half shell.
4. The clamp head structure with the bandwidth reaching 100kHz measuring frequency according to claim 1, wherein the first half shell is provided with a first accommodating cavity, at least two first supporting ribs are distributed on the cavity wall of the first accommodating cavity at intervals, first accommodating grooves are formed in the first supporting ribs, and the first iron core is located in the first accommodating grooves.
5. The clamp head structure with a bandwidth up to 100kHz measuring frequency of claim 4, wherein the notch of the first receiving slot is provided with a chamfer structure.
6. The clamp head structure with the bandwidth reaching 100kHz measuring frequency according to claim 1, wherein the second half shell is provided with a second accommodating cavity, at least two second supporting ribs are distributed on the cavity wall of the second accommodating cavity at intervals, second accommodating grooves are formed in the second supporting ribs, and the second iron core is located in the second accommodating grooves.
7. The clamp head structure with a bandwidth up to 100kHz measuring frequency of claim 6, wherein the notch of the second receiving groove is provided with a chamfer structure.
8. The clamp head structure with the bandwidth reaching 100kHz measuring frequency according to claim 6, wherein a positioning piece is arranged at one end, close to the first half shell, of the cavity wall of the second accommodating cavity, a positioning groove is formed in the positioning piece, and the second iron core is located in the positioning groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321281101.1U CN219915764U (en) | 2023-05-24 | 2023-05-24 | Clamp head structure with bandwidth reaching 100kHz measuring frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321281101.1U CN219915764U (en) | 2023-05-24 | 2023-05-24 | Clamp head structure with bandwidth reaching 100kHz measuring frequency |
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| Publication Number | Publication Date |
|---|---|
| CN219915764U true CN219915764U (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321281101.1U Active CN219915764U (en) | 2023-05-24 | 2023-05-24 | Clamp head structure with bandwidth reaching 100kHz measuring frequency |
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| Country | Link |
|---|---|
| CN (1) | CN219915764U (en) |
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2023
- 2023-05-24 CN CN202321281101.1U patent/CN219915764U/en active Active
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