CN111521859A - Line current measuring method and device of power equipment and computer equipment - Google Patents
Line current measuring method and device of power equipment and computer equipment Download PDFInfo
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- CN111521859A CN111521859A CN202010571659.8A CN202010571659A CN111521859A CN 111521859 A CN111521859 A CN 111521859A CN 202010571659 A CN202010571659 A CN 202010571659A CN 111521859 A CN111521859 A CN 111521859A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
Abstract
The application relates to a line current measuring method and device of power equipment and computer equipment. The line current measuring method of the power equipment comprises the following steps: respectively acquiring the magnetic induction intensity of the wire to be detected in the magnetic sensitivity direction of each magnetic sensor; wherein, each magnetic sensor is positioned on the same straight line; the straight line is not parallel to and coplanar with the lead to be tested; each magnetic sensor comprises a first sensor and a second sensor; the magnetic sensitivity directions of the first sensors are the same and are parallel to a straight line; the magnetic sensitivity direction of the second type sensor is different from that of the first type sensor; if any magnetic induction intensity of the first type of sensor does not fall into the linear range of the corresponding magnetic sensor and the magnetic induction intensity of the second type of sensor falls into the linear range of the second type of sensor, acquiring the current magnetic field ratio of the second type of sensor; and obtaining the current value of the wire to be measured according to the magnetic induction intensity and the current-magnetic field ratio of the second type of sensor.
Description
Technical Field
The present disclosure relates to the field of line detection technologies of electrical devices, and in particular, to a method and an apparatus for measuring a line current of an electrical device, and a computer device.
Background
Cabinet body equipment such as switch board, looped netowrk cabinet, cubical switchboard are by the wide use in electric power system, generally adopt the copper bar of platykurtic as electrically conductive conductor in these cabinet body equipment, and the electric current on the copper bar must be one of the important parameter of measuring among the electric power system. The method reflects the operation state of the power system and is an indispensable input variable for functions of optimizing operation, controlling, protecting and the like of the power system.
In the implementation process, the inventor finds that at least the following problems exist in the conventional technology: the traditional line detection method has the problem of small detection range.
Disclosure of Invention
In view of the above, it is necessary to provide a line current measuring method, device and computer device capable of providing a wide range of power devices in order to solve the above-mentioned technical problems.
In order to achieve the above object, in one aspect, an embodiment of the present invention provides a line current measuring method for an electrical device, including:
respectively acquiring the magnetic induction intensity of the wire to be detected in the magnetic sensitivity direction of each magnetic sensor; wherein, each magnetic sensor is positioned on the same straight line; the straight line is not parallel to and coplanar with the lead to be tested; each magnetic sensor comprises a first sensor and a second sensor; the magnetic sensitivity directions of the first sensors are the same and are parallel to a straight line; the magnetic sensitivity direction of the second type sensor is different from that of the first type sensor;
if any magnetic induction intensity of the first type of sensor does not fall into the linear range of the corresponding magnetic sensor and the magnetic induction intensity of the second type of sensor falls into the linear range of the second type of sensor, acquiring the current magnetic field ratio of the second type of sensor;
and obtaining the current value of the wire to be measured according to the magnetic induction intensity and the current-magnetic field ratio of the second type of sensor.
In one embodiment, the method further comprises the following steps:
if the magnetic induction intensity of the first type of sensor falls into the linear range of the corresponding magnetic sensor, acquiring the relative distance between the sensors of the first type of sensor;
and acquiring the current value of the wire to be measured according to the magnetic induction intensity of the first type of sensor and the relative distance between the sensors.
In one embodiment, the method further comprises the following steps:
and processing the magnetic induction intensity of the second type of sensor and the current value of the wire to be detected to obtain the current-magnetic field ratio of the second type of sensor.
In one embodiment, the step of obtaining the current value of the wire to be measured according to the magnetic induction of the first type of sensor and the relative distance between the sensors includes:
and processing the magnetic induction intensity and the relative distance corresponding to each first type of sensor by adopting the Biao-Safahr law to obtain the current value of the wire to be measured.
In one embodiment, the method further comprises the following steps:
if the magnetic induction intensity of the first sensor and the magnetic induction intensity of the second sensor do not fall into the linear range of the corresponding magnetic sensor, adjusting the relative distance between the second sensor and the first sensor or adjusting the angle between the magnetic sensitivity direction of the second sensor and a straight line so as to enable the second sensor to fall into the linear range of the second sensor;
and obtaining the current magnetic field ratio and the current magnetic induction of the second type of sensor, and obtaining the current value of the wire to be measured according to the current magnetic field ratio and the current magnetic induction.
In one embodiment, the first type of sensor comprises a first uniaxial magnetic sensor, a second uniaxial magnetic sensor, and a third uniaxial magnetic sensor; the second type of sensor comprises a fourth uniaxial magnetic sensor;
the step of respectively obtaining the magnetic induction intensity of the wire to be measured generated in the magnetic sensitivity direction of each magnetic sensor comprises the following steps:
respectively acquiring first magnetic induction intensity generated by a wire to be detected in the magnetic sensitivity direction of a first uniaxial magnetic sensor, second magnetic induction intensity generated in the magnetic sensitivity direction of a second uniaxial magnetic sensor, third magnetic induction intensity generated in the magnetic sensitivity direction of a third uniaxial magnetic sensor and fourth magnetic induction intensity generated in the magnetic sensitivity direction of a fourth uniaxial magnetic sensor;
if any one of the magnetic induction intensities of the first type of sensor does not fall into the linear range of the corresponding magnetic sensor, and the magnetic induction intensity of the second type of sensor falls into the linear range of the second type of sensor, acquiring the current magnetic field ratio of the second type of sensor, and obtaining the current value of the wire to be tested according to the magnetic induction intensity and the current magnetic field ratio of the second type of sensor, wherein the current value comprises the following steps:
if any one of the first magnetic induction intensity, the second magnetic induction intensity and the third magnetic induction intensity does not fall into the linear range of the corresponding magnetic sensor, and the fourth magnetic induction intensity falls into the linear range of the fourth single-axis magnetic sensor, the current magnetic field ratio of the fourth single-axis magnetic sensor is obtained, and the current value of the wire to be tested is obtained according to the current magnetic field ratio and the fourth magnetic induction intensity.
In one embodiment, the method further comprises the following steps:
if the first magnetic induction intensity, the second magnetic induction intensity and the third magnetic induction intensity all fall into the linear range of the corresponding magnetic sensor, acquiring the relative distance among the first single-axis magnetic sensor, the second single-axis magnetic sensor and the third single-axis magnetic sensor; and acquiring the current value of the wire to be measured according to the first magnetic induction, the second magnetic induction, the third magnetic induction and each relative distance.
On one hand, an embodiment of the present invention further provides a line current measuring device for an electrical device, including:
the magnetic induction intensity data acquisition module is used for respectively acquiring the magnetic induction intensity generated by the wire to be detected in the magnetic sensitivity direction of each magnetic sensor; wherein, each magnetic sensor is positioned on the same straight line; the straight line is not parallel to and coplanar with the lead to be tested; each magnetic sensor comprises a first sensor and a second sensor; the magnetic sensitivity directions of the first sensors are the same and are parallel to a straight line; the magnetic sensitivity direction of the second type sensor is different from that of the first type sensor;
the current value acquisition module is used for acquiring the current magnetic field ratio of the second type of sensor if any magnetic induction intensity of the first type of sensor does not fall into the linear range of the corresponding magnetic sensor and the magnetic induction intensity of the second type of sensor falls into the linear range of the second type of sensor; and obtaining the current value of the wire to be measured according to the magnetic induction intensity and the current-magnetic field ratio of the second type of sensor.
In one aspect, an embodiment of the present invention further provides a computer device, which includes a memory and a processor, where the memory stores a computer program, and the processor implements the steps of any one of the above methods when executing the computer program.
In another aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of any one of the above methods.
One of the above technical solutions has the following advantages and beneficial effects:
the line current measuring method of the power equipment comprises the steps of respectively obtaining magnetic induction intensity generated by a wire to be measured in the magnetic sensitivity direction of each magnetic sensor; if any magnetic induction intensity of the first type of sensor does not fall into the linear range of the corresponding magnetic sensor and the magnetic induction intensity of the second type of sensor falls into the linear range of the second type of sensor, acquiring the current magnetic field ratio of the second type of sensor; the magnetic sensors are divided into two types, a second type of sensor can be arranged under the condition that the first type of sensor is inaccurate, and the current value of the wire to be measured can be obtained according to the magnetic induction intensity and the current-magnetic field ratio of the second type of sensor. The magnetic sensitivity of the second type of sensor forms a certain angle with the straight line, so that a larger actual current value can be detected under the condition that the magnetic induction intensity detection range is fixed, and a larger measurement range can be provided.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a first schematic flow chart diagram of a line current measurement method of an electrical power device in one embodiment;
FIG. 2 is a second schematic flow chart diagram of a line current measurement method of an electrical power device in one embodiment;
FIG. 3 is a third schematic flow chart diagram illustrating a line current measurement method for a power device according to one embodiment;
FIG. 4 is a schematic diagram of the layout of a magnetic sensor in one embodiment;
FIG. 5 is a block diagram showing a line current measuring device of an electric power equipment according to an embodiment;
FIG. 6 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, as shown in fig. 1, there is provided a line current measuring method of an electric power device, including the steps of:
s110, respectively obtaining the magnetic induction intensity of the wire to be measured in the magnetic sensitivity direction of each magnetic sensor; wherein, each magnetic sensor is positioned on the same straight line; the straight line is not parallel to and coplanar with the lead to be tested; each magnetic sensor comprises a first sensor and a second sensor; the magnetic sensitivity directions of the first sensors are the same and are parallel to a straight line; the magnetic sensitivity direction of the second type sensor is different from that of the first type sensor;
the magnetic sensors may be any one of the magnetic sensors in the art, and in a specific example, each of the magnetic sensors is a single-axis sensitive magnetic sensor.
Specifically, the wire to be measured generates magnetic induction intensity in the magnetic sensitivity direction of each magnetic sensor. The magnetic sensors are arranged on the same straight line. Each of the magnetic sensors may be classified into a first type sensor and a second type sensor. The magnetic sensitivity directions of the first type sensors are consistent (namely, the magnetic sensitivity directions of the first type sensors are the same direction) and are parallel to a straight line formed by the positions of the magnetic sensors. The magnetic sensitivity direction of the second type of sensor is different from the magnetic sensitivity direction of the first type of sensor, namely the magnetic sensitivity direction of the second type of sensor forms a certain angle (nonparallel) with the straight line. When the measurement is carried out, the magnetic sensors are placed on one side of the lead to be measured, so that the straight line formed by the positions of the magnetic sensors is not parallel to and coplanar with the lead to be measured. It should be noted that the number of the first type of sensors is greater than or equal to 3, and the number of the second type of sensors is greater than or equal to one. In one particular example, the first type of sensor and the second type of sensor are located on either side of the line of construction, i.e. the second type of sensor is located at either end of the line. When the number of the first type sensors is 3, and the number of the second type sensors is 1, the arrangement order of the first type sensors and the second type sensors may be { first type sensors, second type sensors } or { second type sensors, first type sensors }
S120, if any magnetic induction intensity of the first type of sensor does not fall into the linear range of the corresponding magnetic sensor and the magnetic induction intensity of the second type of sensor falls into the linear range of the second type of sensor, acquiring the current magnetic field ratio of the second type of sensor;
the linear range refers to a range in which the output is proportional to the input. If not, the output value representing the magnetic sensor may be inaccurate, thereby affecting the measurement accuracy.
Specifically, if any magnetic induction intensity of the first type of sensor does not fall within the linear range of the corresponding magnetic sensor, the data of the first type of sensor is inaccurate, and the second type of sensor is used for measuring the current value of the wire to be measured. In this embodiment, the current-to-magnetic field ratio of the second type sensor may be obtained in any manner in the art. For example: if the magnetic induction intensity of the first type of sensor falls into the linear range of the corresponding magnetic sensor, acquiring the relative distance between the sensors of the first type of sensor; and acquiring the current value of the wire to be measured according to the magnetic induction intensity of the first type of sensor and the relative distance between the sensors. And processing the magnetic induction intensity of the second type of sensor and the current value of the wire to be detected to obtain the current-magnetic field ratio of the second type of sensor.
It should be noted that the number of the second type sensors may be multiple, and the ratio of the current to the magnetic field of all the second type sensors may be obtained, or the ratio of only one of the second type sensors may be obtained. It should be noted that the magnetic induction of the second sensor for obtaining the ratio of the current to the magnetic field should fall within the linear range of the corresponding second sensor.
And S130, obtaining the current value of the wire to be measured according to the magnetic induction intensity and the current magnetic field ratio of the second type of sensor.
Specifically, the current value of the wire to be measured is the product of the magnetic induction intensity of the second type of sensor and the ratio of the current to the magnetic field.
According to the line current measuring method of the power equipment, the magnetic induction intensity of the wire to be measured generated in the magnetic sensitivity direction of each magnetic sensor is respectively obtained; if any magnetic induction intensity of the first type of sensor does not fall into the linear range of the corresponding magnetic sensor and the magnetic induction intensity of the second type of sensor falls into the linear range of the second type of sensor, acquiring the current magnetic field ratio of the second type of sensor; the magnetic sensors are divided into two types, a second type of sensor can be arranged under the condition that the first type of sensor is inaccurate, and the current value of the wire to be measured can be obtained according to the magnetic induction intensity and the current-magnetic field ratio of the second type of sensor. The magnetic sensitivity of the second type of sensor forms a certain angle with the straight line, so that a larger actual current value can be detected under the condition that the magnetic induction intensity detection range is fixed, and a larger measurement range can be provided.
In one embodiment, as shown in fig. 2, the line current measuring method of the power device further includes the steps of:
s210, if the magnetic induction intensity of the first type of sensor falls into the linear range of the corresponding magnetic sensor, acquiring the relative distance between the sensors of the first type of sensor;
specifically, if the magnetic induction intensities of the first type of sensors all fall within the linear range of the corresponding magnetic sensor, it is indicated that the values of the magnetic induction intensities of the first type of sensors are accurate, and then the relative distance between the sensors of the first type of sensors is obtained. It should be noted that the relative distance between the sensors is the relative distance between the sensors of the first type. It should be noted that the distance between the lead to be tested and each of the first type sensors does not affect the implementation of the embodiment of the present invention. The relative distance between the sensors can be obtained by any means in the art, such as: the relative distance is acquired by a distance sensor.
And S220, acquiring the current value of the wire to be measured according to the magnetic induction intensity of the first type of sensor and the relative distance between the sensors.
Specifically, the step of obtaining the current value of the wire to be measured according to the magnetic induction intensity of the first type of sensor and the relative distance between the sensors includes:
and processing the magnetic induction intensity and the relative distance corresponding to each first type of sensor by adopting the Biao-Safahr law to obtain the current value of the wire to be measured.
In one specific example, three magnetic sensors may be extracted from the first class of sensors, including a first magnetic sensor, a second magnetic sensor, and a third magnetic sensor. The method includes acquiring a first magnetic induction of a first magnetic sensor, a second magnetic induction of a second magnetic sensor, a magnetic induction of a third magnetic sensor, and a relative distance between the magnetic sensors, the relative distance including a relative distance between the first magnetic sensor, the second magnetic sensor, and the third magnetic sensor.
In one embodiment, the method further comprises the following steps:
and processing the magnetic induction intensity of the second type of sensor and the current value of the wire to be detected to obtain the current-magnetic field ratio of the second type of sensor.
Specifically, the current-magnetic field ratio of the second type sensor is a quotient of the magnetic induction intensity of the second type sensor and the current value of the wire to be measured.
In one embodiment, as shown in fig. 3, the line current measuring method of the power device further includes the steps of:
s310, if the magnetic induction intensity of the first sensor and the magnetic induction intensity of the second sensor do not fall into the linear range of the corresponding magnetic sensor, adjusting the relative distance between the second sensor and the first sensor or adjusting the angle between the magnetic sensitivity direction of the second sensor and a straight line so that the second sensor falls into the linear range of the second sensor;
specifically, if the magnetic induction intensity of the first type of sensor and the magnetic induction intensity of the second type of sensor do not fall within the linear range of the corresponding magnetic sensor, it indicates that the magnetic induction intensities measured by the first type of sensor and the second type of sensor are inaccurate. The angle between the magnetic sensitivity direction of the second sensor and the straight line is adjusted, so that the component of the magnetic field generated by the wire to be measured in the magnetic sensitivity direction of the second sensor is smaller by adjusting the angle, and the second sensor can measure a larger current value. Optionally, the relative distance between the second type of sensor and the first type of sensor is adjusted to make the component of the magnetic field generated by the wire to be measured in the magnetic sensitivity direction of the second type of sensor smaller.
S320, obtaining the current magnetic field ratio and the current magnetic induction of the second type of sensor, and obtaining the current value of the wire to be measured according to the current magnetic field ratio and the current magnetic induction.
It should be noted that, when the relative distance between the second type sensor and the first type sensor or the angle between the magnetic sensitivity direction of the second type sensor and the straight line is adjusted to change, the ratio of the current to the magnetic field also changes. The current magnetic field ratio needs to be obtained again according to the obtaining mode of the current magnetic field ratio, and the product of the current magnetic field ratio and the current magnetic induction intensity is determined as the current value of the current wire to be tested.
In one embodiment, the first type of sensor comprises a first uniaxial magnetic sensor, a second uniaxial magnetic sensor, and a third uniaxial magnetic sensor; the second type of sensor comprises a fourth uniaxial magnetic sensor;
the step of respectively obtaining the magnetic induction intensity of the wire to be measured generated in the magnetic sensitivity direction of each magnetic sensor comprises the following steps:
respectively acquiring first magnetic induction intensity generated by a wire to be detected in the magnetic sensitivity direction of a first uniaxial magnetic sensor, second magnetic induction intensity generated in the magnetic sensitivity direction of a second uniaxial magnetic sensor, third magnetic induction intensity generated in the magnetic sensitivity direction of a third uniaxial magnetic sensor and fourth magnetic induction intensity generated in the magnetic sensitivity direction of a fourth uniaxial magnetic sensor;
if any one of the magnetic induction intensities of the first type of sensor does not fall into the linear range of the corresponding magnetic sensor, and the magnetic induction intensity of the second type of sensor falls into the linear range of the second type of sensor, acquiring the current magnetic field ratio of the second type of sensor, and obtaining the current value of the wire to be tested according to the magnetic induction intensity and the current magnetic field ratio of the second type of sensor, wherein the current value comprises the following steps:
if any one of the first magnetic induction intensity, the second magnetic induction intensity and the third magnetic induction intensity does not fall into the linear range of the corresponding magnetic sensor, and the fourth magnetic induction intensity falls into the linear range of the fourth single-axis magnetic sensor, the current magnetic field ratio of the fourth single-axis magnetic sensor is obtained, and the current value of the wire to be tested is obtained according to the current magnetic field ratio and the fourth magnetic induction intensity.
Specifically, the number of the first type of sensor may be 3, and the number of the second type of sensor may be 1. The first-type sensor and the second-type sensor may be arranged in a manner as shown in fig. 4, and the relative distances among the first uniaxial magnetic sensor, the second uniaxial magnetic sensor, and the third uniaxial magnetic sensor may be arbitrary. Therefore, when the measuring method is used, the relative position of the primary loop wire and the three single-axis magnetic sensors does not need to be fixed, so that the current measurement of the wire to be measured can be realized under the condition that the relative position of the wire to be measured and the three single-axis magnetic sensors is prevented from being a fixed value, the installation difficulty is reduced, and the measurement accuracy is improved.
In one embodiment, the method further comprises the following steps:
if the first magnetic induction intensity, the second magnetic induction intensity and the third magnetic induction intensity all fall into the linear range of the corresponding magnetic sensor, acquiring the relative distance among the first single-axis magnetic sensor, the second single-axis magnetic sensor and the third single-axis magnetic sensor; and acquiring the current value of the wire to be measured according to the first magnetic induction, the second magnetic induction, the third magnetic induction and each relative distance.
Specifically, based on the Biao-Saval law, the current value of the wire to be measured is calculated according to the first magnetic induction, the second magnetic induction, the third magnetic induction and each relative distance
The method specifically comprises the following steps:
wherein, IxThe current value of the wire to be measured. B1, B2 and B3 are respectively the first magnetic induction, the second magnetic induction and the third magnetic induction; m is the distance between the first single-axis magnetic sensor and the second single-axis sensor; n is the distance between the first single-axis magnetic sensor and the third single-axis sensor; mu.s0Is a vacuum magnetic conductivity; and pi is the circumferential ratio.
Specifically, the first magnetic induction, the second magnetic induction and the third magnetic induction can be obtained by the following steps: a first proportionality coefficient of a first uniaxial magnetic sensor, a second proportionality coefficient of a second uniaxial magnetic sensor and a third proportionality coefficient of a third uniaxial magnetic sensor are measured in advance; applying direct-current voltages to the first single-axis magnetic sensor, the second single-axis magnetic sensor and the third single-axis magnetic sensor to obtain a first voltage output by the first single-axis magnetic sensor, a second voltage output by the second single-axis magnetic sensor and a third voltage output by the third single-axis magnetic sensor; the product of the first scaling factor and the first voltage is used as a first magnetic induction of the first uniaxial magnetic sensor, the product of the second scaling factor and the second voltage is used as a second magnetic induction of the second uniaxial magnetic sensor, and the third scaling factor and the third voltage are used as a third magnetic induction of the third uniaxial magnetic sensor.
It should be understood that although the various steps in the flow charts of fig. 1-3 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-3 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
To further illustrate the above measurement method, the following description is further provided with a specific example:
as shown in FIG. 4, 4 magnetic sensors (the 1 st magnetic sensor, the 2 nd magnetic sensor and the 3 rd magnetic sensor from left to right) have a linear range of 0-35 Gs, wherein x is1＝7mm，
α＝0，m＝3mm，n＝6mm，p＝9mm，
The wire current is 100A, and the magnetic induction intensity measured by the 4 magnetic sensors is: b is1＝24.74Gs，B2＝32.77Gs，B3＝28.20Gs，B4＝9.05Gs。
According to the method of the above steps S210 and S220, the current of 100.00A can be calculated by the 1 st to 3 rd magnetic sensors, and therefore,
now, assuming that the current is increased to 200A, the magnetic induction intensities in the sensitive directions of the 4 magnetic sensors are respectively: b'1＝49.48Gs，B'2＝65.54Gs，B’3＝56.40Gs，B'4As is apparent from 18.10 Gs., the magnetic induction intensity generated by the current exceeds the linear range of the 1 st to 3 rd magnetic sensors, so that the method of fig. 1 proposed in the present application can calculate the current I ξnormal·B'4200.00A. Therefore, the current measuring method improves the current measuring range, and meanwhile, the size of the measuring range can be adjusted by adjusting the distance and the angle of the 4 th magnetic sensor.
In one embodiment, as shown in fig. 5, there is provided a line current measuring device of an electric power apparatus, including:
the magnetic induction intensity data acquisition module is used for respectively acquiring the magnetic induction intensity generated by the wire to be detected in the magnetic sensitivity direction of each magnetic sensor; wherein, each magnetic sensor is positioned on the same straight line; the straight line is not parallel to and coplanar with the lead to be tested; each magnetic sensor comprises a first sensor and a second sensor; the magnetic sensitivity directions of the first sensors are the same and are parallel to a straight line; the magnetic sensitivity direction of the second type sensor is different from that of the first type sensor;
the current value acquisition module is used for acquiring the current magnetic field ratio of the second type of sensor if any magnetic induction intensity of the first type of sensor does not fall into the linear range of the corresponding magnetic sensor and the magnetic induction intensity of the second type of sensor falls into the linear range of the second type of sensor; and obtaining the current value of the wire to be measured according to the magnetic induction intensity and the current-magnetic field ratio of the second type of sensor.
In one embodiment, the method further comprises the following steps:
the adjusting module is used for adjusting the relative distance between the second type of sensor and the first type of sensor or adjusting the angle between the magnetic sensitivity direction of the second type of sensor and a straight line if the magnetic induction intensity of the first type of sensor and the magnetic induction intensity of the second type of sensor do not fall into the linear range of the corresponding magnetic sensor, so that the second type of sensor falls into the linear range of the second type of sensor; the current magnetic field ratio and the current magnetic induction intensity of the second type of sensor are obtained, and the current value of the wire to be measured is obtained according to the current magnetic field ratio and the current magnetic induction intensity.
For specific limitations of the line current measuring device of the power equipment, reference may be made to the above limitations of the line current measuring method of the power equipment, and details are not repeated here. The modules in the line current measuring device of the power equipment can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 6. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a line current measurement method of an electrical power device. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 5 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
respectively acquiring the magnetic induction intensity of the wire to be detected in the magnetic sensitivity direction of each magnetic sensor; wherein, each magnetic sensor is positioned on the same straight line; the straight line is not parallel to and coplanar with the lead to be tested; each magnetic sensor comprises a first sensor and a second sensor; the magnetic sensitivity directions of the first sensors are the same and are parallel to a straight line; the magnetic sensitivity direction of the second type sensor is different from that of the first type sensor;
if any magnetic induction intensity of the first type of sensor does not fall into the linear range of the corresponding magnetic sensor and the magnetic induction intensity of the second type of sensor falls into the linear range of the second type of sensor, acquiring the current magnetic field ratio of the second type of sensor;
and obtaining the current value of the wire to be measured according to the magnetic induction intensity and the current-magnetic field ratio of the second type of sensor.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
if the magnetic induction intensity of the first type of sensor falls into the linear range of the corresponding magnetic sensor, acquiring the relative distance between the sensors of the first type of sensor;
and acquiring the current value of the wire to be measured according to the magnetic induction intensity of the first type of sensor and the relative distance between the sensors.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and processing the magnetic induction intensity of the second type of sensor and the current value of the wire to be detected to obtain the current-magnetic field ratio of the second type of sensor.
In one embodiment, the processor performs the step of obtaining the current value of the wire to be measured according to the magnetic induction of the first type of sensor and the relative distance between the sensors, and further performs the following steps:
and processing the magnetic induction intensity and the relative distance corresponding to each first type of sensor by adopting the Biao-Safahr law to obtain the current value of the wire to be measured.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
if the magnetic induction intensity of the first sensor and the magnetic induction intensity of the second sensor do not fall into the linear range of the corresponding magnetic sensor, adjusting the relative distance between the second sensor and the first sensor or adjusting the angle between the magnetic sensitivity direction of the second sensor and a straight line so as to enable the second sensor to fall into the linear range of the second sensor;
and obtaining the current magnetic field ratio and the current magnetic induction of the second type of sensor, and obtaining the current value of the wire to be measured according to the current magnetic field ratio and the current magnetic induction.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
respectively acquiring the magnetic induction intensity of the wire to be detected in the magnetic sensitivity direction of each magnetic sensor; wherein, each magnetic sensor is positioned on the same straight line; the straight line is not parallel to and coplanar with the lead to be tested; each magnetic sensor comprises a first sensor and a second sensor; the magnetic sensitivity directions of the first sensors are the same and are parallel to a straight line; the magnetic sensitivity direction of the second type sensor is different from that of the first type sensor;
if any magnetic induction intensity of the first type of sensor does not fall into the linear range of the corresponding magnetic sensor and the magnetic induction intensity of the second type of sensor falls into the linear range of the second type of sensor, acquiring the current magnetic field ratio of the second type of sensor;
and obtaining the current value of the wire to be measured according to the magnetic induction intensity and the current-magnetic field ratio of the second type of sensor.
In one embodiment, the computer program when executed by the processor further performs the steps of:
if the magnetic induction intensity of the first type of sensor falls into the linear range of the corresponding magnetic sensor, acquiring the relative distance between the sensors of the first type of sensor;
and acquiring the current value of the wire to be measured according to the magnetic induction intensity of the first type of sensor and the relative distance between the sensors.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and processing the magnetic induction intensity of the second type of sensor and the current value of the wire to be detected to obtain the current-magnetic field ratio of the second type of sensor.
In one embodiment, the step of obtaining the current value of the wire to be measured according to the magnetic induction of the first type of sensor and the relative distance between the sensors is further implemented by the processor as follows:
and processing the magnetic induction intensity and the relative distance corresponding to each first type of sensor by adopting the Biao-Safahr law to obtain the current value of the wire to be measured.
In one embodiment, the computer program when executed by the processor further performs the steps of:
if the magnetic induction intensity of the first sensor and the magnetic induction intensity of the second sensor do not fall into the linear range of the corresponding magnetic sensor, adjusting the relative distance between the second sensor and the first sensor or adjusting the angle between the magnetic sensitivity direction of the second sensor and a straight line so as to enable the second sensor to fall into the linear range of the second sensor;
and obtaining the current magnetic field ratio and the current magnetic induction of the second type of sensor, and obtaining the current value of the wire to be measured according to the current magnetic field ratio and the current magnetic induction.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus DRAM (RDRAM), and interface DRAM (DRDRAM).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A line current measuring method of an electric power device, characterized by comprising the steps of:
respectively acquiring the magnetic induction intensity of the wire to be detected in the magnetic sensitivity direction of each magnetic sensor; wherein, each magnetic sensor is positioned on the same straight line; the straight line is not parallel to the lead to be tested and is not coplanar; each magnetic sensor comprises a first type sensor and a second type sensor; the magnetic sensitivity directions of the first sensors are the same and are parallel to the straight line; the magnetic sensitivity direction of the second type sensor is different from that of the first type sensor;
if any magnetic induction intensity of the first type of sensor does not fall into the linear range of the corresponding magnetic sensor and the magnetic induction intensity of the second type of sensor falls into the linear range of the second type of sensor, acquiring the current magnetic field ratio of the second type of sensor;
and obtaining the current value of the wire to be measured according to the magnetic induction intensity of the second type sensor and the current magnetic field ratio.
2. The line current measurement method of an electric power device according to claim 1, characterized by further comprising the steps of:
if the magnetic induction intensity of the first type of sensor falls into the linear range of the corresponding magnetic sensor, acquiring the relative distance between the sensors of the first type of sensor;
and acquiring the current value of the wire to be measured according to the magnetic induction intensity of the first type of sensor and the relative distance between the sensors.
3. The line current measurement method of an electric power device according to claim 2, characterized by further comprising the steps of:
and processing the magnetic induction intensity of the second sensor and the current value of the wire to be detected to obtain the current-magnetic field ratio of the second sensor.
4. The method for measuring the line current of the power equipment according to claim 2, wherein the step of obtaining the current value of the wire to be measured according to the magnetic induction of the first type of sensor and the relative distance between the sensors comprises:
and processing the magnetic induction intensity corresponding to each first type of sensor and each relative distance by adopting a proportional-integral-derivative-law to obtain the current value of the wire to be measured.
5. The line current measurement method of an electric power device according to claim 1, characterized by further comprising the steps of:
if the magnetic induction intensity of the first type of sensor and the magnetic induction intensity of the second type of sensor do not fall into the linear range of the corresponding magnetic sensor, adjusting the relative distance between the second type of sensor and the first type of sensor or adjusting the angle between the magnetic sensitivity direction of the second type of sensor and the straight line so as to enable the magnetic induction intensity of the second type of sensor to fall into the linear range of the second type of sensor;
and acquiring the current magnetic field ratio and the current magnetic induction of the second type of sensor, and acquiring the current value of the wire to be tested according to the current magnetic field ratio and the current magnetic induction.
6. The line current measuring method of the power device according to claim 1, wherein the first-type sensor includes a first uniaxial magnetic sensor, a second uniaxial magnetic sensor, and a third uniaxial magnetic sensor; the second type of sensor comprises a fourth uniaxial magnetic sensor;
the step of respectively obtaining the magnetic induction intensity of the wire to be measured generated in the magnetic sensitivity direction of each magnetic sensor comprises the following steps:
respectively acquiring first magnetic induction intensity generated by a wire to be detected in the magnetic sensitivity direction of a first uniaxial magnetic sensor, second magnetic induction intensity generated in the magnetic sensitivity direction of a second uniaxial magnetic sensor, third magnetic induction intensity generated in the magnetic sensitivity direction of a third uniaxial magnetic sensor and fourth magnetic induction intensity generated in the magnetic sensitivity direction of a fourth uniaxial magnetic sensor;
if any magnetic induction intensity of the first type of sensor does not fall into the linear range of the corresponding magnetic sensor, and the magnetic induction intensity of the second type of sensor falls into the linear range of the second type of sensor, the step of obtaining the current-magnetic field ratio of the second type of sensor comprises the following steps:
if first magnetic induction, second magnetic induction the arbitrary one in the third magnetic induction does not fall into the linear range of corresponding magnetic sensor, just fourth magnetic induction all falls into the linear range of fourth unipolar magnetic sensor, then acquires the current magnetic field ratio of fourth unipolar magnetic sensor, and according to current magnetic field ratio with fourth magnetic induction obtains the current value of the wire that awaits measuring.
7. The line current measurement method of an electric power device according to claim 6, characterized by further comprising the steps of:
if the first magnetic induction intensity, the second magnetic induction intensity and the third magnetic induction intensity all fall into the linear range of the corresponding magnetic sensor, acquiring the relative distance among the first single-axis magnetic sensor, the second single-axis magnetic sensor and the third single-axis magnetic sensor; and acquiring the current value of the wire to be measured according to the first magnetic induction, the second magnetic induction, the third magnetic induction and the relative distances.
8. A line current measuring device of an electric power apparatus, characterized by comprising:
the magnetic induction intensity data acquisition module is used for respectively acquiring the magnetic induction intensity generated by the wire to be detected in the magnetic sensitivity direction of each magnetic sensor; wherein, each magnetic sensor is positioned on the same straight line; the straight line is not parallel to the lead to be tested and is not coplanar; each magnetic sensor comprises a first type sensor and a second type sensor; the magnetic sensitivity directions of the first sensors are the same and are parallel to the straight line; the magnetic sensitivity direction of the second type sensor is different from that of the first type sensor;
the current value obtaining module is used for obtaining a current magnetic field ratio of the second type of sensor if any magnetic induction intensity of the first type of sensor does not fall into the linear range of the corresponding magnetic sensor and the magnetic induction intensity of the second type of sensor falls into the linear range of the second type of sensor; and obtaining the current value of the wire to be measured according to the magnetic induction intensity of the second type sensor and the current magnetic field ratio.
9. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
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