CN210155204U - Non-contact current monitoring device - Google Patents
Non-contact current monitoring device Download PDFInfo
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- CN210155204U CN210155204U CN201920788816.3U CN201920788816U CN210155204U CN 210155204 U CN210155204 U CN 210155204U CN 201920788816 U CN201920788816 U CN 201920788816U CN 210155204 U CN210155204 U CN 210155204U
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Abstract
The utility model discloses a non-contact current monitoring device, which comprises a shell, a magnetic core and a Hall sensing element, wherein the shell is provided with an opening penetrating through the shell; the magnetic core is arranged on the shell and surrounds the periphery of the opening, and an air gap is arranged between two ends of the magnetic core; the Hall sensing element is arranged between the air gaps of the magnetic cores. The magnetic core is arranged, the magnetic core plays a role of magnetic conduction, a magnetic flux generated by the main conducting wire of the storage battery due to the ampere law is concentrated at an air gap position between two ends of the magnetic core, a Hall sensing element arranged at the air gap position between two ends of the magnetic core can obtain larger magnetic flux under the action of the magnetic core, a stronger Hall effect is generated, a voltage signal or a current signal with larger strength is output, the signal-to-noise ratio of an output signal is correspondingly improved through the energy of an enhanced output signal, a more accurate calculation result is obtained, and the precision of non-contact current monitoring is improved.
Description
Technical Field
The utility model relates to a sensor technical field, in particular to non-contact current monitoring device.
Background
The current detector is a sensor applied to the interior of an automobile and used for monitoring the magnitude of current obtained by the automobile from a storage battery in real time. The current detector monitors the real-time current and transmits a corresponding signal to the control system, and the control system adjusts the power output of the automobile alternating-current generator in real time through the feedback signal so as to provide the optimal combination of fuel economy and an electric operating system.
In the traditional current monitoring method, an alloy sampling resistor is used as a sensitive element, the alloy resistor is installed in a current loop in series, and when a current passes through the alloy resistor, a voltage signal generated on the sampling resistor is transmitted to a control system for conversion, so that a real-time current is obtained.
Because the sampling resistor used in the traditional scheme has the phenomenon of large heat productivity when the current signal is large, the precision of the sampling resistor is greatly influenced by temperature drift, and the precision of data acquired in real time is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a non-contact current monitoring device, can improve the precision to electric current real-time supervision's data.
According to one of the aspects of the utility model, a non-contact current monitoring device is provided, include:
the shell is provided with an opening penetrating through the shell;
the magnetic core is arranged on the shell and surrounds the periphery of the opening, and an air gap is arranged between two ends of the magnetic core;
a Hall sensing element disposed between the air gaps of the magnetic core.
Has the advantages that: the utility model provides a non-contact current monitoring device, which comprises a shell, a magnetic core and a Hall sensing element, wherein the shell is provided with an opening penetrating through the shell; the magnetic core is arranged on the shell and surrounds the periphery of the opening, and an air gap is arranged between two ends of the magnetic core; the Hall sensing element is arranged between the air gaps of the magnetic cores. When the automobile storage battery is used, the opening of the shell is sleeved on the storage battery main guide line, and the storage battery main guide line penetrates through the opening of the shell and then is connected with an electric system of an automobile for power supply. Since the real-time output current of the main conductor of the storage battery is determined by the real-time power consumption of the electrical system, when the power consumption of the electrical system changes, the change of the output current of the main conductor of the storage battery is caused. According to ampere's law: the magnetic field that can produce around the straight wire of circular telegram consequently, when the change of battery leading wire output current, can arouse the change of magnetic field intensity, and hall sensing element can convert the magnetic field intensity in the space into the magnitude of voltage according to hall effect to the realization is to the non-contact current monitoring of battery leading wire. Considering that the current value of the main conducting wire of the storage battery is not very large, the magnetic field generated by the ampere law is not very large, the strength of the voltage signal or the current signal output by the corresponding Hall sensing element is weak, the signal transmission process is easily interfered by noise, and the final calculation result generates a large error. Therefore, the magnetic core has been set up, the magnetic core plays the effect of magnetic conduction, a magnetic flux that is used for concentrating the main wire of battery because ampere's law produces is to the air gap position between the magnetic core both ends, the hall sensing element who sets up on the air gap position between the magnetic core both ends can obtain bigger magnetic flux under the effect of magnetic core, thereby produce stronger hall effect, output more powerful voltage signal or current signal, the corresponding improvement output signal's SNR of energy through reinforcing output signal, the rethread is markd among the hall effect this moment magnetic field and the corresponding relation of the two of the signal of telecommunication of hall sensing element output, obtain more accurate calculation result, the precision of non-contact current monitoring has been promoted.
As a further improvement of the above scheme, a second positioning frame is arranged in the housing, the second positioning frame surrounds the periphery of the opening, and a second mounting groove for placing the magnetic core is formed between the second positioning frame and the opening. Further, the intensity of the output electric signal of the Hall sensing element is improved, the signal to noise ratio of the output electric signal of the Hall sensing element is reduced, and the current monitoring precision is improved.
As a further improvement of the above scheme, a first positioning frame is arranged in the housing, the first positioning frame forms a first mounting groove in the housing, and a circuit board electrically connected with the hall sensing element is arranged in the first mounting groove. The assembly efficiency is improved.
As a further improvement of the above scheme, a filter circuit and a power supply module are arranged on the circuit board; the filter circuit is electrically connected with the Hall sensing element and is used for filtering an electric signal output from a second output pin of the Hall sensing element; the power module is electrically connected with the Hall sensing element and used for supplying power to the Hall sensing element. The filter circuit is arranged to filter the electric signal output by the Hall sensing element, so that the noise of the electric signal output by the Hall sensing element is reduced, the signal-to-noise ratio is improved, and the current monitoring precision is further improved.
As a further improvement of the above scheme, the power module includes a voltage stabilization chip and a first capacitor; two ends of the first capacitor are respectively and electrically connected with a first input pin and a first grounding pin of the voltage stabilizing chip; and a first output pin of the voltage stabilizing chip is electrically connected with a second input pin of the Hall sensing element. Thereby promoting the ability of the voltage stabilization chip to process the electric signal.
As a further improvement of the above scheme, the power module further includes a second capacitor, and two ends of the second capacitor are electrically connected to the first output pin and the first ground pin of the voltage regulator chip, respectively. The accuracy of the current monitored by the Hall sensing element is improved.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples;
FIG. 1 is a cross-sectional view of an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an embodiment of the present invention;
fig. 3 is a schematic block diagram of an automobile control system using a non-contact current monitoring device provided by an embodiment of the present invention;
in the figure, 100-shell, 110-first positioning frame, 120-opening, 130-second positioning frame, 131-magnetic core, 132-Hall sensing element, 140-circuit board, 141-power supply module, 142-first capacitor, 143-second capacitor, 144-Hall sensing module and 145-filter circuit.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
As shown in fig. 1, a non-contact current monitoring device includes a housing 100, a magnetic core 131, and a hall sensing element 132, wherein an opening 120 is formed in the housing 100 and penetrates through the housing 100; the magnetic core 131 is arranged on the shell 100 and surrounds the periphery of the opening 120, and an air gap is arranged between two ends of the magnetic core 131; the hall sensing element 132 is disposed between the air gaps of the magnetic cores 131. The hall sensor 132 is an integrated circuit chip manufactured according to the hall effect, the output voltage of the hall sensor changes with the change of the magnetic flux density, the types of the hall sensor include YS49EB, YS43F, and the like, as shown in fig. 2, the package structure generally has three pins: the second input pin is used for connecting a power supply to ensure normal operation of the hall sensing element 132, and the second output pin is used for outputting a voltage signal, where the voltage signal represents the magnetic field strength sensed by the hall sensing element 132.
The storage battery is also charged synchronously by the generator when supplying power to the electric system of the automobile through the main conducting wire, when the electric power of the electric system is overlarge, if the power input to the storage battery by the generator is not enough, the storage battery is easy to lose power, and the storage battery is easy to damage in the past. Therefore, in the prior art, the generator is generally operated by using larger power to supply power to the storage battery, but the power consumption of the electric system of the automobile is changed from moment to moment, and the arrangement of the power consumption is easy to cause the increase of the oil consumption of the generator. As shown in fig. 3, in order to solve the problem mentioned above, will the utility model provides a pair of non-contact current monitoring device uses on vehicle control system, vehicle control system's core is ECU (Electronic control Unit, also called Electronic control unit), the magnetic field intensity of the main lead wire through non-contact current monitoring device real-time supervision battery and transmit the signal of telecommunication as feedback signal for ECU, the real-time power consumption of current electrical system is shown to feedback signal's size, ECU sends the output of control signal control generator to the generator according to feedback signal's size, avoid generator output too big to lead to extravagant or the undersize leads to the battery insufficient voltage, thereby energy saving consumes and promote the stability of electrical system operation.
On the basis of the above embodiment, a second positioning frame 130 is disposed in the housing 100, the second positioning frame 130 surrounds the periphery of the opening 120, and a second mounting groove for placing the magnetic core 131 is formed between the second positioning frame 130 and the opening 120. Set up the second mounting groove and made things convenient for the assembly of magnetic core 131, the second mounting groove hugs closely around opening 120 simultaneously, magnetic core 131 with the matching of second mounting groove shape also hugs closely around opening 120, guarantee that the magnetic field area that the battery main conductor produced concentrates in magnetic core 131, and act on more magnetic fluxes at the hall inductive element 132 that is located the air gap position between magnetic core 131 both ends under the guide of magnetic core 131, further promote the intensity of hall inductive element 132 output signal of telecommunication, reduce the SNR of hall inductive element 132 output signal of telecommunication, the precision of current monitoring has been promoted.
As shown in fig. 1, on the basis of the above embodiment, a first positioning frame 110 is disposed in the casing 100, the first positioning frame 110 forms a first mounting groove around the casing 100, and a circuit board 140 electrically connected to the hall sensing element 132 is disposed in the first mounting groove. Set up first locating frame 110 and constitute the first mounting groove that is used for installing circuit board 140, during the assembly, install circuit board 140 in first mounting groove, rethread screw is fixed circuit board 140 in first mounting groove, has made things convenient for location and installation when circuit board 140 is built-in casing 100, has improved assembly efficiency.
As shown in fig. 2, the circuit according to the embodiment of the present invention includes two parts: the hall sensing module 144 and the power module 141 for supplying power to the hall sensing module 144, wherein the hall sensing module 144 includes the hall sensing element 132 and the filter circuit 145, and on the basis of the above embodiment, the filter circuit 145 and the power module 141 are disposed on the circuit board 140; the filter circuit 145 is electrically connected to the hall sensing element 132, specifically, the filter circuit 145 includes a second resistor R2 and a third capacitor C3 connected in parallel, and the filter circuit 145 formed by connecting the second resistor R2 and the third capacitor C3 in parallel is electrically connected between the second output pin and the second ground pin, and is configured to filter an electrical signal output from the second output pin of the hall sensing element 132; the power module 141 is electrically connected to the hall sensing element 132 and is configured to supply power to the hall sensing element 132. The filter circuit 145 is arranged to filter the electric signal output by the hall sensing element 132, so that the noise of the electric signal output by the hall sensing element 132 is reduced, the signal-to-noise ratio is improved, and the current monitoring precision is further improved.
As shown in fig. 2, based on the above embodiment, the power module 141 includes a voltage stabilizing chip, a first capacitor C1142; two ends of the first capacitor C1142 are respectively and electrically connected with a first input pin and a first grounding pin of the voltage stabilizing chip; the first output pin of the voltage stabilization chip is electrically connected to the second input pin of the hall sensing element 132. The input pin of the voltage stabilizing chip is connected with a first capacitor C1142 for filtering the current input into the voltage stabilizing chip, so that the quality of the input electric signal of the voltage stabilizing chip is improved, and the capacity of the voltage stabilizing chip for processing the electric signal is improved. The voltage stabilizing chip is used for outputting a power supply stabilized within a certain voltage range to the hall sensing element 132 to ensure the stable operation of the hall sensing element 132, and in different embodiments, the voltage stabilizing chip can adopt different models according to different parameter requirements, including LM2930T-8.0, LM2940CT and the like, and generally has three pins: the voltage stabilizing circuit comprises a first input pin, a first output pin and a first grounding pin, wherein an electric signal is input into the voltage stabilizing chip from the first input pin, and the voltage stabilized within a certain range value is output from the first output pin.
On the basis of the above embodiment, the power module 141 further includes a second capacitor C2143, and two ends of the second capacitor C2143 are electrically connected to the first output pin and the first ground pin of the voltage regulator chip, respectively. The second capacitor C2143 is used for filtering the electric signal output by the first output pin of the voltage stabilizing chip, so that the quality of the electric signal output by the voltage stabilizing chip is improved, the working stability of the hall sensing element 132 is ensured, and the current monitoring precision of the hall sensing element 132 is improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (6)
1. A non-contact current monitoring device, comprising:
the shell is provided with an opening penetrating through the shell;
the magnetic core is arranged on the shell and surrounds the periphery of the opening, and an air gap is arranged between two ends of the magnetic core;
a Hall sensing element disposed between the air gaps of the magnetic core.
2. A non-contact current monitoring device according to claim 1, wherein: and a second positioning frame is arranged in the shell, the second positioning frame surrounds the periphery of the opening, and a second mounting groove for placing the magnetic core is formed between the second positioning frame and the opening.
3. A non-contact current monitoring device according to claim 1 or 2, wherein: the shell is internally provided with a first positioning frame, the first positioning frame forms a first mounting groove in the shell in a surrounding mode, and a circuit board electrically connected with the Hall sensing element is arranged in the first mounting groove.
4. A non-contact current monitoring device according to claim 3, wherein: the circuit board is provided with a filter circuit and a power supply module;
the filter circuit is electrically connected with the Hall sensing element and is used for filtering an electric signal output from a second output pin of the Hall sensing element;
the power module is electrically connected with the Hall sensing element and used for supplying power to the Hall sensing element.
5. A non-contact current monitoring device according to claim 4, wherein: the power supply module comprises a voltage stabilizing chip and a first capacitor;
two ends of the first capacitor are respectively and electrically connected with a first input pin and a first grounding pin of the voltage stabilizing chip;
and a first output pin of the voltage stabilizing chip is electrically connected with a second input pin of the Hall sensing element.
6. A non-contact current monitoring device according to claim 5, wherein: the power supply module further comprises a second capacitor, and two ends of the second capacitor are respectively and electrically connected with the first output pin and the first grounding pin of the voltage stabilizing chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920788816.3U CN210155204U (en) | 2019-05-28 | 2019-05-28 | Non-contact current monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920788816.3U CN210155204U (en) | 2019-05-28 | 2019-05-28 | Non-contact current monitoring device |
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| CN210155204U true CN210155204U (en) | 2020-03-17 |
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| CN201920788816.3U Active CN210155204U (en) | 2019-05-28 | 2019-05-28 | Non-contact current monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115541969A (en) * | 2022-10-27 | 2022-12-30 | 云南电网有限责任公司电力科学研究院 | Non-contact current and voltage composite measurement equipment and system |
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2019
- 2019-05-28 CN CN201920788816.3U patent/CN210155204U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115541969A (en) * | 2022-10-27 | 2022-12-30 | 云南电网有限责任公司电力科学研究院 | Non-contact current and voltage composite measurement equipment and system |
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