CN108152657B - Inductance determination method and device of inductor - Google Patents
Inductance determination method and device of inductor Download PDFInfo
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- CN108152657B CN108152657B CN201711203667.1A CN201711203667A CN108152657B CN 108152657 B CN108152657 B CN 108152657B CN 201711203667 A CN201711203667 A CN 201711203667A CN 108152657 B CN108152657 B CN 108152657B
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- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention discloses a method and a device for determining inductance of an inductor. Wherein, the method comprises the following steps: determining the distributed capacitance of the detected inductor and the standard capacitance of the standard inductor; acquiring a first frequency, wherein the first frequency is a frequency corresponding to a signal generator on a circuit when a voltmeter on the circuit of the detected inductor reaches an extreme value; and determining the inductance of the detected inductor according to the distributed capacitance, the standard capacitance and the first frequency. The invention solves the technical problem of potential safety hazard in the detection of the connecting wire in the related technology.
Description
Technical Field
The invention relates to the field of wiring detection, in particular to a method and a device for determining inductance of an inductor.
Background
In the related art, the wiring inspection of the electric energy meter is generally realized through a buzzer, specifically, a BV line (the BV line is a plastic copper line for short, a single-core hard conductor unsheathed power cable for general purposes, B represents a category, a wire is arranged, T represents a copper conductor, and V represents insulation, polyvinyl chloride) is connected to the wire end of the buzzer, and the accuracy of the wiring of the meter and the outgoing line of the mutual inductor is identified through the sound emitted by the buzzer. Specifically, if the wiring is wrong, the resistance of the wiring increases to cause a change in sound. However, the method adopted in the above related art is easily affected by external environment, for example, factors such as insufficient voltage, complex circuit, noise, etc., and the accuracy of the circuit connection cannot be accurately judged by sound; the accuracy of line connection is single and unstable through voice identification; meanwhile, the related equipment adopts a flexible wire capable of being wound, the wire head needs to be in direct contact with a point to be tested manually, and great potential safety hazards exist.
Aiming at the problem that potential safety hazards exist in the detection of the connecting wire in the related technology, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for determining inductance of an inductor, which are used for at least solving the technical problem of potential safety hazard in the detection of a wire in the related technology.
According to an aspect of the embodiments of the present invention, there is provided a method for determining an inductance of an inductor, including: determining the distributed capacitance of the detected inductor and the standard capacitance of the standard inductor; acquiring a first frequency, wherein the first frequency is a frequency corresponding to a signal generator on a circuit where the detected inductor is located when a numerical value of a voltmeter on the circuit reaches an extreme value; and determining the inductance of the measured inductor according to the distributed capacitance, the standard capacitance and the first frequency.
Optionally, determining the distributed capacitance of the measured inductance comprises: acquiring a second frequency, wherein the second frequency is a frequency corresponding to the signal generator when a circuit in which the detected inductor is located is in a natural resonance state; and determining the distributed capacitance of the measured inductance according to the first frequency, the second frequency and the standard capacitance.
Optionally, determining the distributed capacitance of the measured inductance according to the first frequency, the second frequency, and the standard capacitance includes: determining the distributed capacitance of the measured inductance by a first formula, wherein the first formula is:
wherein C0 represents the distributed capacitance, f1 represents the second frequency, f represents the first frequency, and C represents the standard capacitance.
Optionally, determining the inductance of the measured inductor according to the distributed capacitance, the standard capacitance and the first frequency includes: through the secondDetermining the inductance of the measured inductor by a formula, wherein the second formula is as follows:
wherein L represents the inductance of the measured inductance.
Optionally, after determining the inductance of the measured inductor according to the distributed capacitance, the standard capacitance, and the first frequency, the inductance determining method of the inductor further includes: and displaying the inductance of the measured inductor.
According to another aspect of the embodiments of the present invention, there is provided an inductance determining apparatus of an inductor, including: the first determining unit is used for determining the distributed capacitance of the detected inductor and the standard capacitance of the standard inductor; the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring a first frequency, and the first frequency is a frequency corresponding to a signal generator on a circuit where the detected inductor is located when a numerical value of a voltmeter on the circuit reaches an extreme value; and the second determining unit is used for determining the inductance of the measured inductor according to the distributed capacitance, the standard capacitance and the first frequency.
Optionally, the first determining unit includes: the acquisition module is used for acquiring a second frequency, wherein the second frequency is a frequency corresponding to the signal generator when a circuit where the detected inductor is located is in a natural resonance state; and the first determining module is used for determining the distributed capacitance of the measured inductance according to the first frequency, the second frequency and the standard capacitance.
Optionally, the determining module includes: a determining submodule, configured to determine the distributed capacitance of the measured inductance by using a first formula, where the first formula is:
wherein C0 represents the distributed capacitance, f1 represents the second frequency, f represents the first frequency, and C represents the standard capacitance.
Optionally, the second determining unit includes: a second determination module for determining by a second formulaThe inductance of the measured inductor, wherein the second formula is:
wherein L represents the inductance of the measured inductance.
Optionally, the inductance determining apparatus of the inductor further includes: and the display unit is used for displaying the inductance of the detected inductor after determining the inductance of the detected inductor according to the distributed capacitance, the standard capacitance and the first frequency.
According to another aspect of an embodiment of the present invention, there is provided a storage medium, including a stored program, wherein the program executes the inductance determination method of the inductance described in any one of the above.
According to another aspect of the embodiments of the present invention, there is also provided a processor, where the processor is configured to execute a program, where the program executes the method for determining the inductance of the inductor.
In the embodiment of the invention, the distributed capacitance of the detected inductor and the standard capacitance of the standard inductor are determined; acquiring a first frequency, wherein the first frequency is a frequency corresponding to a signal generator on a circuit when a voltmeter on the circuit of the detected inductor reaches an extreme value; and determining the inductance of the detected inductor according to the distributed capacitance, the standard capacitance and the first frequency. The inductance quantity determining method of the inductor provided by the embodiment of the invention can judge the wiring condition of the line by judging whether the line has the inductor or not, and introduces the flexible (namely, the flexible hard wire in the above text) to pull the distance between a measurer and the test point, thereby achieving the technical effect of avoiding safety risks of personnel and further solving the technical problem of potential safety hazard in the detection of the wiring in the related technology.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flow chart of a method of inductance determination of an inductance according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a circuit for measuring inductance according to an embodiment of the invention; and
fig. 3 is a schematic diagram of an inductance determining apparatus of an inductor according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
For convenience of description, some nouns or terms appearing in the embodiments of the present invention are described in detail below.
Mutual inductor: also called instrument transformer, is a general name of current transformer and voltage transformer.
Inductance: the electromagnetic induction element is formed by winding an insulated conducting wire, and is also one of the common components in an electronic circuit.
Resonance: i.e. a physical simple harmonic vibration, the acceleration of the object vibrates under the action of a restoring force proportional to the displacement from the equilibrium position and always directed towards the equilibrium position.
An oscilloscope: the device is used for displaying the trace change of the measured instantaneous value, and a narrow electron beam composed of high-speed electrons is used for striking a screen coated with a fluorescent substance to generate a fine light spot.
Distributed capacitance: consists of two conductors which are insulated from each other and have a voltage difference. That is, in any circuit, a distributed capacitance is formed between any two insulated conductors where a voltage differential exists.
In accordance with an embodiment of the present invention, there is provided a method embodiment of a method for determining inductance of an inductor, it should be noted that the steps illustrated in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.
Fig. 1 is a flowchart of an inductance determination method of an inductor according to an embodiment of the present invention, and as shown in fig. 1, the inductance determination method of the inductor includes the following steps:
and S102, determining the distributed capacitance of the detected inductor and the standard capacitance of the standard inductor.
Step S104, acquiring a first frequency, wherein the first frequency is a frequency corresponding to a signal generator on a circuit when a voltmeter on the circuit of the detected inductor reaches an extreme value.
And step S106, determining the inductance of the detected inductor according to the distributed capacitance, the standard capacitance and the first frequency.
Through the steps, the distributed capacitance of the detected inductor and the standard capacitance of the standard inductor can be determined; acquiring a first frequency, wherein the first frequency is a frequency corresponding to a signal generator on a circuit when a voltmeter on the circuit of the detected inductor reaches an extreme value; and determining the inductance of the detected inductor according to the distributed capacitance, the standard capacitance and the first frequency. Compared with the prior art that the detection of the inductance of the detected inductor is carried out through the size of the sound emitted by the buzzer in the access circuit, the connection of a circuit is relatively single and unstable through sound identification, meanwhile, the detection equipment in the prior art adopts the flexible wire capable of being wound, the wire needs to be manually and directly contacted with a point to be detected, and the defect of great potential safety hazard exists.
In step S102, determining the distributed capacitance of the measured inductor may include: acquiring a second frequency, wherein the second frequency is the frequency corresponding to the signal generator when the circuit in which the detected inductor is located is in a natural resonance state; and determining the distributed capacitance of the detected inductor according to the first frequency, the second frequency and the standard capacitance.
An alternative embodiment of the present invention will now be described in detail with reference to the accompanying drawings.
The main characteristic of the inductor is magnetic field energy storage, but since it is generally made by winding metal wire, there are winding resistance (including loss resistance inserted by magnetic material for magnetic core inductor) and distributed capacitance between wire turn and wire turn, if some special manufacturing process is adopted, the distributed capacitance can be reduced, and when the working frequency is low, the distributed capacitance can be ignored, so that the measurement of the inductor mainly includes two parts of inductance measurement and loss, fig. 2 is a schematic diagram of a circuit for measuring the inductor according to the embodiment of the invention, wherein the circuit is a circuit for measuring the inductor by parallel resonance method, as shown in fig. 2, C is standard inductor, L is measured inductor, C is measured inductor, and C is measured inductor0Is the distributed capacitance of the measured inductor. During the measurement, the frequency of the signal source is adjusted so that the electricity is generatedThe circuit resonates, i.e. the voltmeter V indicates maximum, noting the frequency of the signal source at that time (i.e. the first frequency in this context). In addition, the distributed capacitance C of the measured inductance also needs to be measured0In measuring the distributed capacitance C0In the process, a standard capacitor is not required to be connected, and then the frequency of a signal source is adjusted, so that the circuit naturally resonates to obtain a second frequency. Wherein, an oscilloscope is also connected in the circuit for measuring the inductance.
Wherein, determining the distributed capacitance of the measured inductor according to the first frequency, the second frequency and the standard capacitance may include: determining the distributed capacitance of the detected inductor through a first formula, wherein the first formula is as follows:
where C0 denotes the distributed capacitance, f1 denotes the second frequency, f denotes the first frequency, and C denotes the standard capacitance.
In addition, determining the inductance of the sensed inductor according to the distributed capacitance, the standard capacitance and the first frequency may include: and determining the inductance of the detected inductor through a second formula, wherein the second formula is as follows:
wherein L represents the inductance of the measured inductance.
In an optional embodiment of the present invention, after determining the inductance of the measured inductor according to the distributed capacitance, the standard capacitance, and the first frequency, the inductance determining method of the inductor may further include: and displaying the inductance of the detected inductor. The display screen used for displaying the inductance of the detected inductance is a liquid crystal display screen, the inductance of the detected inductance is displayed, and the line wiring judgment result can be visualized.
The inductance quantity determining method of the inductor provided by the embodiment of the invention can shorten the field working time, reduce the safety risk of field workers, and avoid the work obstruction and the safety risk to the field workers due to the narrow space of the metering cabinet by using the windable hard wire.
According to another aspect of the embodiment of the present invention, there is also provided an inductance determining apparatus of an inductor, fig. 3 is a schematic diagram of an inductance determining apparatus of an inductor according to an embodiment of the present invention, as shown in fig. 3, the inductance determining apparatus of an inductor includes: a first determining unit 31, an acquiring unit 33 and a second determining unit 35. The inductance determining device of the inductor will be described in detail below.
The first determining unit 31 is used for determining the distributed capacitance of the detected inductor and the standard capacitance of the standard inductor.
And the obtaining unit 33 is connected to the first determining unit 31, and is configured to obtain a first frequency, where the first frequency is a frequency corresponding to a signal generator on a circuit where the detected inductor is located when a value of a voltmeter on the circuit reaches an extreme value.
And a second determining unit 35, connected to the acquiring unit 33, for determining the inductance of the detected inductor according to the distributed capacitance, the standard capacitance and the first frequency.
In the above embodiment, a first determining unit may be utilized for determining the distributed capacitance of the measured inductor and the standard capacitance of the standard inductor; the acquisition unit is used for acquiring a first frequency, wherein the first frequency is the frequency corresponding to a signal generator on a circuit when a voltmeter on the circuit of the detected inductor reaches an extreme value; and the second determining unit is used for determining the inductance of the detected inductor according to the distributed capacitance, the standard capacitance and the first frequency. The inductance quantity determining device of the inductor provided by the embodiment of the invention can judge the wiring condition of the line by judging whether the line has the inductor or not, and introduces the telescopic (namely, the above-mentioned windeable hard wire) to pull the distance between a measurer and a test point, thereby achieving the technical effect of avoiding safety risks of personnel and further solving the technical problem of potential safety hazard in the detection of the wiring in the related technology.
In an optional embodiment of the present invention, the first determining unit includes: the acquisition module is used for acquiring a second frequency, wherein the second frequency is the frequency corresponding to the signal generator when the circuit where the detected inductor is located is in a natural resonance state; and the first determining module is used for determining the distributed capacitance of the detected inductor according to the first frequency, the second frequency and the standard capacitance.
In an optional embodiment of the present invention, the determining module includes: the determining submodule is used for determining the distributed capacitance of the detected inductor through a first formula, wherein the first formula is as follows:
where C0 denotes the distributed capacitance, f1 denotes the second frequency, f denotes the first frequency, and C denotes the standard capacitance.
In an optional embodiment of the present invention, the second determining unit includes: the second determining module is used for determining the inductance of the detected inductor through a second formula, wherein the second formula is as follows:
wherein L represents the inductance of the measured inductance.
In an optional embodiment of the present invention, the inductance determining apparatus further includes: and the display unit is used for displaying the inductance of the detected inductor after determining the inductance of the detected inductor according to the distributed capacitor, the standard capacitor and the first frequency.
The inductance determination device of the inductor comprises a processor and a memory, wherein the first determination unit 31, the acquisition unit 33, the second determination unit 35 and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be set to be one or more, and the inductance of the detected inductor is determined according to the distributed capacitance, the standard capacitance and the first frequency by adjusting the kernel parameters.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
According to another aspect of an embodiment of the present invention, there is provided a storage medium characterized in that the storage medium includes a stored program, wherein the program executes the inductance determination method of the inductance of any one of the above.
According to another aspect of the embodiments of the present invention, there is also provided a processor, which is characterized in that the processor is configured to execute a program, where the program executes the method for determining the inductance of the inductor according to any one of the above methods.
The embodiment of the present invention further provides an apparatus, which includes a processor, a memory, and a program stored in the memory and executable on the processor, and when the processor executes the program, the following steps are implemented: determining the distributed capacitance of the detected inductor and the standard capacitance of the standard inductor; acquiring a first frequency, wherein the first frequency is a frequency corresponding to a signal generator on a circuit when a voltmeter on the circuit of the detected inductor reaches an extreme value; and determining the inductance of the detected inductor according to the distributed capacitance, the standard capacitance and the first frequency.
There is also provided in an embodiment of the invention a computer program product adapted to perform a program for initializing the following method steps when executed on a data processing device: determining the distributed capacitance of the detected inductor and the standard capacitance of the standard inductor; acquiring a first frequency, wherein the first frequency is a frequency corresponding to a signal generator on a circuit when a voltmeter on the circuit of the detected inductor reaches an extreme value; and determining the inductance of the detected inductor according to the distributed capacitance, the standard capacitance and the first frequency.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A method for determining an inductance of an inductor, comprising:
determining the distributed capacitance of the detected inductor and the standard capacitance of the standard inductor;
acquiring a first frequency, wherein the first frequency is a frequency corresponding to a signal generator on a circuit where the detected inductor is located when a numerical value of a voltmeter on the circuit reaches an extreme value;
determining the inductance of the measured inductor according to the distributed capacitance, the standard capacitance and the first frequency;
wherein determining the distributed capacitance of the measured inductance comprises: acquiring a second frequency, wherein the second frequency is a frequency corresponding to the signal generator when a circuit in which the detected inductor is located is in a natural resonance state; determining the distributed capacitance of the measured inductance according to the first frequency, the second frequency and the standard capacitance;
wherein determining the distributed capacitance of the measured inductance according to the first frequency, the second frequency, and the standard capacitance comprises: determining the distributed capacitance of the measured inductance by a first formula, wherein the first formula is:
wherein C0 represents the distributed capacitance, f1 represents the second frequency, f represents the first frequency, and C represents the standard capacitance.
2. The method of claim 1, further comprising, after determining an inductance of the measured inductance from the distributed capacitance, the standard capacitance, and the first frequency:
and displaying the inductance of the measured inductor.
3. An inductance determining apparatus of an inductor, comprising:
the first determining unit is used for determining the distributed capacitance of the detected inductor and the standard capacitance of the standard inductor;
the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring a first frequency, and the first frequency is a frequency corresponding to a signal generator on a circuit where the detected inductor is located when a numerical value of a voltmeter on the circuit reaches an extreme value;
the second determining unit is used for determining the inductance of the measured inductor according to the distributed capacitor, the standard capacitor and the first frequency;
wherein the first determination unit includes: the acquisition module is used for acquiring a second frequency, wherein the second frequency is a frequency corresponding to the signal generator when a circuit where the detected inductor is located is in a natural resonance state;
a first determining module, configured to determine the distributed capacitance of the measured inductor according to the first frequency, the second frequency, and the standard capacitance;
wherein the determining module comprises: a determining submodule, configured to determine the distributed capacitance of the measured inductance by using a first formula, where the first formula is:
wherein C0 represents the distributed capacitance, f1 represents the second frequency, f represents the first frequency, and C represents the standard capacitance.
4. The apparatus of claim 3, further comprising:
and the display unit is used for displaying the inductance of the detected inductor after determining the inductance of the detected inductor according to the distributed capacitance, the standard capacitance and the first frequency.
5. A storage medium characterized by comprising a stored program, wherein the program executes the inductance determination method of inductance according to any one of claims 1 or 2.
6. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to execute the method for determining an inductance of an inductor according to any one of claims 1 or 2 when running.
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| CN202534234U (en) * | 2012-04-13 | 2012-11-14 | 江南大学 | Resonance method inductance measurement experimental instrument |
| CN104849638A (en) * | 2015-06-09 | 2015-08-19 | 国电大渡河检修安装有限公司 | Series-resonance withstand voltage testing device of frequency modulation and inductance adjustment type, and design method therefor |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202534234U (en) * | 2012-04-13 | 2012-11-14 | 江南大学 | Resonance method inductance measurement experimental instrument |
| CN104849638A (en) * | 2015-06-09 | 2015-08-19 | 国电大渡河检修安装有限公司 | Series-resonance withstand voltage testing device of frequency modulation and inductance adjustment type, and design method therefor |
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|---|---|
| CN108152657A (en) | 2018-06-12 |
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