Alternating current measurement method, apparatus, system, and computer-readable storage medium

Abstract

The application discloses an alternating current measurement method, device, system and computer readable storage medium, the method comprises: connecting the to-be-measured circuit with a measurement conductor, and determining a measurement position according to the position of the measurement conductor; determining the background magnetic field magnetic flux corresponding to the measurement position, and measuring the total magnetic field magnetic flux in the measurement position through a solenoid and an auxiliary circuit; based on the background magnetic field magnetic flux and the total magnetic field magnetic flux, determining the alternating current intensity corresponding to the to-be-measured circuit. The application determines the total magnetic field magnetic flux and the background magnetic field magnetic flux in the measurement position, calculates the alternating current intensity corresponding to the to-be-measured circuit by using the total magnetic field magnetic flux and the background magnetic field magnetic flux, eliminates the background magnetic field magnetic flux in the calculation process by considering the background magnetic field magnetic flux in the calculation process, and thus the precision of the alternating current measurement based on the magnetic field is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of data processing, and particularly relates to an alternating current measurement method, device, system and computer readable storage medium. BACKGROUND

[0002] Current is a very key physical quantity in scientific research and engineering application; therefore, it is of great significance to develop high-precision current measurement technology. For alternating current, the current is mainly measured by electromagnetic induction at present, but the energized conductor generates a magnetic field in the space around it, and there is a background magnetic field in the environment around the energized conductor, which is irrelevant to the current of the energized conductor, including the earth's magnetic field, other magnetic fields generated in the measured circuit, etc. The existence of the background magnetic field will significantly affect the precision of measuring the alternating current by electromagnetic induction.

[0003] Therefore, how to improve the precision of alternating current measurement is a problem to be solved. SUMMARY

[0004] The main purpose of the present application is to provide an alternating current measurement method, device, system and computer readable storage medium, which aims to solve the problem of how to improve the precision of alternating current measurement.

[0005] To achieve the above purpose, the present application provides an alternating current measurement method, which comprises the following steps:

[0006] connecting the measured circuit with the measurement conductor, and determining the measurement position according to the position of the measurement conductor;

[0007] determining the background magnetic flux corresponding to the measurement position, and measuring the total magnetic flux in the measurement position by a solenoid and an auxiliary circuit;

[0008] determining the alternating current intensity corresponding to the measured circuit based on the background magnetic flux and the total magnetic flux.

[0009] Optionally, the step of connecting the measured circuit with the measurement conductor and determining the measurement position according to the position of the measurement conductor comprises:

[0010] determining the predicted alternating current intensity corresponding to the measured circuit, determining the measurement conductor based on the predicted alternating current intensity, and connecting the measured circuit with the measurement conductor;

[0011] acquiring the shape of the measurement conductor, and determining the measurement position according to the position and shape of the measurement conductor and a preset measurement position determination rule.

[0012] Optionally, the step of measuring the total magnetic flux in the measurement position by a solenoid and an auxiliary circuit comprises:

[0013] acquire a coil area and a coil turn number of the solenoid, and determine a total magnetic induction intensity in the measurement position;

[0014] determine, by the solenoid and the auxiliary circuit, a total magnetic field flux in the measurement position based on the coil area, the coil turn number and the total magnetic induction intensity.

[0015] Optionally, the step of determining the alternating current intensity corresponding to the to-be-measured circuit based on the background magnetic field flux and the total magnetic field flux comprises:

[0016] determining an alternating current compensation value based on the background magnetic field flux, and determining a first conversion relationship between the total magnetic field flux and the alternating current intensity corresponding to the to-be-measured circuit;

[0017] acquiring a resistance value, a capacitance value and a capacitance voltage of the auxiliary circuit, and determining the alternating current intensity based on the first conversion relationship, the resistance value, the capacitance value, the capacitance voltage and the alternating current compensation value.

[0018] Optionally, the measurement position comprises a first measurement position and a second measurement position, the total magnetic field flux comprises a first total magnetic field flux and a second total magnetic field flux, and the step of determining the background magnetic field flux corresponding to the measurement position and measuring, by the solenoid and the auxiliary circuit, the total magnetic field flux in the measurement position comprises:

[0019] determining the background magnetic field flux corresponding to the measurement position based on a preset rule;

[0020] measuring, by the solenoid and the auxiliary circuit, the first total magnetic field flux in the first measurement position and the second total magnetic field flux in the second measurement position, the first total magnetic field flux and the second total magnetic field flux having different values.

[0021] Optionally, the solenoid comprises a first solenoid and a second solenoid, and the auxiliary circuit comprises a first auxiliary circuit and a second auxiliary circuit, and the step of measuring, by the solenoid and the auxiliary circuit, the first total magnetic field flux in the first measurement position and the second total magnetic field flux in the second measurement position comprises:

[0022] acquiring a first coil area and a first coil turn number of the first solenoid, and determining a first total magnetic induction intensity in the first measurement position;

[0023] determining, by the first solenoid and the first auxiliary circuit, the first total magnetic field flux in the first measurement position based on the first coil area, the first coil turn number and the first total magnetic induction intensity.

[0024] obtaining a second coil area and a second coil turn number of the second solenoid, and determining a second total magnetic induction intensity in the second measurement position;

[0025] determining, by the second solenoid and the second auxiliary circuit, a second total magnetic field flux in the second measurement position based on the second coil area, the second coil turn number and the second total magnetic induction intensity.

[0026] Optionally, the step of determining the alternating current intensity corresponding to the to-be-measured circuit based on the background magnetic field flux and the total magnetic field flux comprises:

[0027] determining a second conversion relationship between the first total magnetic field flux, the background magnetic field flux and the alternating current intensity corresponding to the to-be-measured circuit, and determining a third conversion relationship between the second total magnetic field flux, the background magnetic field flux and the alternating current intensity corresponding to the to-be-measured circuit;

[0028] determining the alternating current intensity corresponding to the to-be-measured circuit based on the second conversion relationship, the third conversion relationship, the first total magnetic field flux, the second total magnetic field flux and the background magnetic field flux.

[0029] In addition, to achieve the above object, the application further provides an alternating current measurement device, which comprises:

[0030] a first determination module, configured to connect a to-be-measured circuit with a measurement conductor, and determine a measurement position according to a position of the measurement conductor;

[0031] a second determination module, configured to determine a background magnetic field flux corresponding to the measurement position, and measure a total magnetic field flux in the measurement position by a solenoid and an auxiliary circuit;

[0032] a third determination module, configured to determine an alternating current intensity corresponding to the to-be-measured circuit based on the background magnetic field flux and the total magnetic field flux.

[0033] Further, the first determination module is further configured to:

[0034] determine a predicted alternating current intensity corresponding to the to-be-measured circuit, determine a measurement conductor based on the predicted alternating current intensity, and connect the to-be-measured circuit with the measurement conductor;

[0035] obtain a shape of the measurement conductor, and determine a measurement position according to a preset measurement position determination rule and the position and shape of the measurement conductor.

[0036] Further, the second determination module is further configured to:

[0037] acquire a coil area and a coil turn number of the solenoid, and determine a total magnetic induction intensity in the measurement position;

[0038] determine, by the solenoid and the auxiliary circuit, a total magnetic field flux in the measurement position based on the coil area, the coil turn number and the total magnetic induction intensity.

[0039] Further, the third determining module is further configured to:

[0040] determine an alternating current compensation value based on the background magnetic field flux, and determine a first conversion relationship between the total magnetic field flux and an alternating current intensity corresponding to the to-be-measured circuit;

[0041] acquire a resistance value, a capacitance value and a capacitance voltage of the auxiliary circuit, and determine the alternating current intensity based on the first conversion relationship, the resistance value, the capacitance value, the capacitance voltage and the alternating current compensation value.

[0042] Further, the second determining module is further configured to:

[0043] determine a background magnetic field flux corresponding to the measurement position based on a preset rule;

[0044] measure, by the solenoid and the auxiliary circuit, a first total magnetic field flux in the first measurement position and a second total magnetic field flux in the second measurement position, the first total magnetic field flux and the second total magnetic field flux having different values.

[0045] Further, the second determining module is further configured to:

[0046] acquire a first coil area and a first coil turn number of the first solenoid, and determine a first total magnetic induction intensity in the first measurement position;

[0047] determine, by the first solenoid and the first auxiliary circuit, a first total magnetic field flux in the first measurement position based on the first coil area, the first coil turn number and the first total magnetic induction intensity.

[0048] acquire a second coil area and a second coil turn number of the second solenoid, and determine a second total magnetic induction intensity in the second measurement position;

[0049] determine, by the second solenoid and the second auxiliary circuit, a second total magnetic field flux in the second measurement position based on the second coil area, the second coil turn number and the second total magnetic induction intensity.

[0050] Further, the third determining module is further configured to:

[0051] determine a second conversion relationship between the first total magnetic field magnetic flux, the background magnetic field magnetic flux and the alternating current intensity corresponding to the circuit to be measured, and determine a third conversion relationship between the second total magnetic field magnetic flux, the background magnetic field magnetic flux and the alternating current intensity corresponding to the circuit to be measured;

[0052] determine the alternating current intensity corresponding to the circuit to be measured based on the second conversion relationship, the third conversion relationship, the first total magnetic field magnetic flux, the second total magnetic field magnetic flux and the background magnetic field magnetic flux.

[0053] In addition, to achieve the above object, the present application also provides an alternating current measurement system, comprising a memory, a processor and an alternating current measurement program stored on the memory and executable on the processor, and the alternating current measurement program implements the steps of the alternating current measurement method when executed by the processor.

[0054] In addition, to achieve the above object, the present application also provides a computer readable storage medium, wherein the computer readable storage medium stores an alternating current measurement program, and the alternating current measurement program implements the steps of the alternating current measurement method when executed by a processor.

[0055] The alternating current measurement method provided by the present application connects the circuit to be measured with a measurement conductor, determines a measurement position according to the position of the measurement conductor, determines the background magnetic field magnetic flux corresponding to the measurement position, measures the total magnetic field magnetic flux in the measurement position through a solenoid and an auxiliary circuit, and determines the alternating current intensity corresponding to the circuit to be measured based on the background magnetic field magnetic flux and the total magnetic field magnetic flux. The present application determines the total magnetic field magnetic flux and the background magnetic field magnetic flux in the measurement position, calculates the alternating current intensity corresponding to the circuit to be measured by using the total magnetic field magnetic flux and the background magnetic field magnetic flux, eliminates the background magnetic field magnetic flux in the calculation process by considering the background magnetic field magnetic flux in the calculation process, and thus improves the precision of the alternating current measurement based on the magnetic field. BRIEF DESCRIPTION OF DRAWINGS

[0056] Figure 1 is a device structure schematic diagram of a hardware running environment involved in the embodiment scheme of the present application;

[0057] Figure 2 is a flow schematic diagram of the first embodiment of the alternating current measurement method of the present application;

[0058] Figure 3 is a scene schematic diagram of measuring the alternating current intensity by using a group of solenoids and auxiliary circuits;

[0059] Figure 4Flowchart for determining total magnetic field magnetic flux for the second embodiment of the alternating current measurement method of the present application;

[0060] Figure 5 Flowchart for determining alternating current intensity for the second embodiment of the alternating current measurement method of the present application;

[0061] Figure 6 Scene diagram for measuring alternating current intensity by using two groups of solenoids and auxiliary circuits according to the present application;

[0062] Figure 7 Flowchart for determining background magnetic field magnetic flux and total magnetic field magnetic flux for the third embodiment of the alternating current measurement method of the present application;

[0063] Figure 8 Flowchart for determining alternating current intensity for the third embodiment of the alternating current measurement method of the present application.

[0064] The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings. DETAILED DESCRIPTION

[0065] 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.

[0066] As shown in Figure 1 , the device structure diagram of the hardware running environment involved in the embodiment scheme of the present application. Figure 1

[0067] The device of the embodiment of the present application can be a PC or a server device.

[0068] As shown in Figure 1 , the device can include a processor 1001 such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, and a communication bus 1002. The communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 can include a display screen (Display), an input unit such as a keyboard (Keyboard), and an optional user interface 1003 can also include a standard wired interface, a wireless interface. The network interface 1004 can optionally include a standard wired interface, a wireless interface (such as a WI-FI interface). The memory 1005 can be a high-speed RAM memory, or a stable memory (non-volatile memory) such as a magnetic disk memory. The memory 1005 can also be an independent storage device from the aforementioned processor 1001.

[0069] Those skilled in the art can understand that Figure 1 ​The device structure shown in the figures does not constitute a limitation on the device, and can include more or fewer components than shown, or combine certain components, or arrange different components.

[0070] As shown in Figure 1 The memory 1005 as a computer storage medium can include an operating system, a network communication module, a user interface module, and an alternating current measurement program.

[0071] The operating system is a program that manages and controls the portable alternating current measurement system and software resources, supports the operation of the network communication module, the user interface module, the alternating current measurement program, and other programs or software; the network communication module is used to manage and control the network interface 1002; the user interface module is used to manage and control the user interface 1003.

[0072] In Figure 1 The alternating current measurement system calls the alternating current measurement program stored in the memory 1005 through the processor 1001, and performs the operations in each embodiment of the alternating current measurement method described below.

[0073] Based on the above hardware structure, embodiments of the alternating current measurement method of the present application are proposed.

[0074] Referring to Figure 2 , Figure 2 The flowchart of the first embodiment of the alternating current measurement method of the present application is shown, and the method comprises:

[0075] Step S10, connecting the circuit to be measured with the measurement conductor, and determining the measurement position according to the position of the measurement conductor;

[0076] Step S20, determining the background magnetic flux corresponding to the measurement position, and measuring the total magnetic flux in the measurement position through the solenoid and the auxiliary circuit;

[0077] Step S30, determining the alternating current intensity corresponding to the circuit to be measured based on the background magnetic flux and the total magnetic flux.

[0078] The alternating current measurement method in the embodiment is applied to an alternating current measurement device, which can be a terminal, a PC device, a current meter or the like. For the convenience of description, the alternating current measurement device is taken as an example for description. The alternating current measurement device comprises a measurement conductor, a magnetic measurement system, a current converter and a current display. A relevant measurement personnel first connects a to-be-measured circuit to the measurement conductor in the alternating current measurement device, and the alternating current measurement device determines a measurement position according to the position of the measurement conductor. The alternating current measurement device determines a background magnetic flux corresponding to the measurement position, and measures a total magnetic flux in the measurement position through a solenoid and an auxiliary circuit in the magnetic measurement system. The alternating current measurement device determines an alternating current intensity corresponding to the to-be-measured circuit based on the background magnetic flux and the total magnetic flux through the current converter, and displays the alternating current intensity corresponding to the to-be-measured circuit to the relevant measurement personnel through the current display.

[0079] The alternating current measurement method in the embodiment connects a to-be-measured circuit to a measurement conductor, and determines a measurement position according to the position of the measurement conductor. The background magnetic flux corresponding to the measurement position is determined, and the total magnetic flux in the measurement position is measured through a solenoid and an auxiliary circuit. The alternating current intensity corresponding to the to-be-measured circuit is determined based on the background magnetic flux and the total magnetic flux. The total magnetic flux and the background magnetic flux in the measurement position are determined, the alternating current intensity corresponding to the to-be-measured circuit is calculated based on the total magnetic flux and the background magnetic flux, the background magnetic flux is considered in the calculation process, the background magnetic flux is eliminated in the calculation process, and the precision of the alternating current measurement based on the magnetic field is improved.

[0080] The following will be described in detail.

[0081] In step S10, the to-be-measured circuit is connected to the measurement conductor, and a measurement position is determined according to the position of the measurement conductor.

[0082] In the embodiment, the relevant measurement personnel first connects the to-be-measured circuit to the measurement conductor in the alternating current measurement device. The alternating current measurement device determines the measurement position according to the position and shape of the measurement conductor and a relevant preset measurement position determination rule, and the number of measurement positions. It should be noted that the measurement conductor is a part of the alternating current measurement device connected to the to-be-measured circuit. The measurement conductor is a section of wire with a specific shape, which can be a straight section, a circular solenoid, a square solenoid or other shapes.

[0083] Specifically, step S10 comprises:

[0084] In step S101, a predicted alternating current intensity corresponding to the to-be-measured circuit is determined, the measurement conductor is determined based on the predicted alternating current intensity, and the to-be-measured circuit is connected to the measurement conductor.

[0085] In this step, the relevant measurement personnel first analyzes the to-be-measured circuit, determines the predicted alternating current intensity corresponding to the to-be-measured circuit, and uploads the predicted alternating current intensity to the alternating current measurement device. The alternating current measurement device determines the predicted alternating current intensity, determines the measurement conductor based on the predicted alternating current intensity, and connects the to-be-measured circuit with the measurement conductor. Optionally, the alternating current measurement device determines the measurement conductor to be a straight wire, a circular solenoid with N turns, a square solenoid with N turns, or a wire with other shapes according to the to-be-measured circuit and actual measurement requirements, such as the value range of the alternating current intensity of the to-be-measured circuit. Optionally, the alternating current measurement device can be internally provided with multiple sections of measurement conductors with different shapes, such as a straight wire, a circular solenoid with N turns, a square solenoid with N turns, or a wire with other shapes. By selecting a button or a switch, the measurement conductor with one of the shapes can be connected with the to-be-measured circuit.

[0086] In this step, the alternating current measurement device determines the measurement position according to the preset measurement position determination rule and the position and shape of the measurement conductor.

[0087] In this step, the alternating current measurement device determines the measurement position according to the preset measurement position determination rule and the position and shape of the measurement conductor.

[0088] Further, the alternating current measurement device can determine the measurement position and the number of measurement positions according to actual measurement requirements, such as acceptable measurement error, in combination with the shape of the measurement conductor, the position of the measurement conductor, and the preset measurement position determination rule, where the number of measurement positions is at least one.

[0089] In this step, the alternating current measurement device determines the measurement position according to the preset measurement position determination rule and the position and shape of the measurement conductor.

[0090] In this embodiment, the alternating current measurement device determines the background magnetic field magnetic flux corresponding to the measurement position through the magnetic measurement system after determining the measurement position, and measures the total magnetic field magnetic flux in the measurement position through the magnetometer. It can be understood that the background magnetic field is other magnetic fields except the magnetic field generated by the current in the to-be-measured circuit, such as the earth's magnetic field and other magnetic fields generated in the to-be-measured circuit. The total magnetic field is the sum of all magnetic fields existing around the measurement conductor. The auxiliary circuit can be a resistor, or an RLC circuit composed of a resistor and a capacitor,

[0091] Exemplarily, after determining the measurement position, the solenoid and the auxiliary circuit measure the determined total magnetic field magnetic flux Φ B (t) at the measurement position B (t) = aI(t) + Φ a (t), where aI(t) is the magnetic field generated by the alternating current in the circuit to be measured, a is a constant related to the position of the solenoid relative to the circuit to be measured, and Φ a (t) is the background magnetic field magnetic flux. Optionally, the magnetic measurement system of the alternating current measurement device has N solenoids and corresponding auxiliary circuits, and the total magnetic field magnetic flux measured by each solenoid and auxiliary circuit at the corresponding measurement position is respectively Φ B1 (t), Φ B2 (t), …, and Φ BN (t), where the minimum value of N is 1, and for each measurement position, the total magnetic field magnetic flux measured by multiple solenoids and auxiliary circuits can be taken, and the average of all total magnetic field magnetic fluxes is taken to determine the total magnetic field magnetic flux of the corresponding measurement position, thereby improving the accuracy of determining the total magnetic field magnetic flux.

[0092] Step S30, based on the background magnetic field magnetic flux and the total magnetic field magnetic flux, determining the current intensity corresponding to the circuit to be measured.

[0093] In this embodiment, the alternating current measurement device expresses the magnetic field magnetic flux generated by the alternating current in the circuit to be measured based on the background magnetic field magnetic flux and the total magnetic field magnetic flux through the current converter, and then according to the relationship among the background magnetic field magnetic flux, the total magnetic field magnetic flux, and the magnetic field magnetic flux generated by the alternating current in the circuit to be measured, the background magnetic field magnetic flux is eliminated or integrated into the calculation process, thereby determining the alternating current intensity corresponding to the circuit to be measured, and then displaying the alternating current intensity corresponding to the circuit to be measured through the current display.

[0094] Exemplarily, the alternating current measurement device obtains the formula f(Φ B (t) = aI(t) + Φ a (t) through the current converter based on the formula Φ B1 (t) = aI(t) + Φ B2 (t), and the total magnetic field magnetic flux measured by the N solenoids and corresponding auxiliary circuits and the magnetic flux Φa(t) contributed by the background magnetic field eliminated through appropriate calculation, and obtains the formula f(Φ BN (t), Φ B1 (t), …, and Φ B2 (t)) = βI(t), where f represents the symbol of a certain function, the specific expression of which is determined by the setting of the magnetic measurement system, β is a constant, and the formula f(Φ BNThe specific expression of f(Φ(t))=βI(t) is shown in the following formula. The current converter converts the current according to the formula f(Φ B1 Φ(t), Φ(t) B2 Φ(t), Φ(t) BN The specific expression of f(Φ(t))=βI(t) is shown in the following formula. The current converter converts the current according to the formula f(Φ

[0095] The alternating current measurement device of the embodiment connects the circuit to be measured with the measurement conductor, and determines the measurement position according to the position of the measurement conductor; determines the background magnetic flux of the measurement position, and measures the total magnetic flux in the measurement position through the solenoid and the auxiliary circuit; determines the alternating current intensity corresponding to the circuit to be measured based on the background magnetic flux and the total magnetic flux. The application calculates the alternating current intensity corresponding to the circuit to be measured by determining the total magnetic flux and the background magnetic flux in the measurement position, and eliminating the background magnetic flux in the calculation process, thereby improving the accuracy of the alternating current measurement based on the magnetic field.

[0096] Further, referring to Figure 3 , Figure 4 and Figure 5 , the second embodiment of the alternating current measurement method is proposed.

[0097] The second embodiment of the alternating current measurement method is different from the first embodiment of the alternating current measurement method in that the step of measuring the total magnetic flux in the measurement position through the solenoid and the auxiliary circuit comprises:

[0098] In step S201, the coil area and the number of turns of the solenoid are obtained, and the total magnetic induction intensity in the measurement position is determined;

[0099] In the embodiment, the alternating current measurement device obtains the coil area and the number of turns of the solenoid, and determines the total magnetic induction intensity in the measurement position. It can be understood that the coil area refers to the area of a circle formed by a coil in the solenoid, the number of turns refers to the number of coils in the solenoid, and the total magnetic induction intensity in the measurement position can be determined by measuring devices such as magnetometers. The total magnetic induction intensity is the vector sum of the background magnetic induction intensity in the measurement position and the magnetic induction intensity generated by the solenoid of the circuit to be measured.

[0100] In step S202, the total magnetic flux in the measurement position is determined through the solenoid and the auxiliary circuit based on the coil area, the number of turns and the total magnetic induction intensity.

[0101] In the embodiment, the alternating current measuring device determines the total magnetic field magnetic flux in the measuring position based on the coil area, the coil turns and the total magnetic induction intensity through the solenoid and the auxiliary circuit; specifically, after determining the total magnetic field intensity in the measuring position, the alternating current measuring device multiplies the coil area, the coil turns and the total magnetic induction intensity to obtain the total magnetic field magnetic flux in the measuring position.

[0102] Further, the step S30 comprises:

[0103] The step S301 comprises determining an alternating current compensation value based on the background magnetic field magnetic flux and determining a first conversion relationship between the total magnetic field magnetic flux and the alternating current intensity corresponding to the to-be-measured circuit.

[0104] In the embodiment, when calculating the alternating current intensity, the alternating current measuring device regards all the background magnetic field magnetic flux as a constant value and does not consider the induced electromotive force generated by the background magnetic field magnetic flux in the solenoid, but in the preliminary test, the induced electromotive force generated by the background magnetic field magnetic flux in the solenoid is converted into the alternating current compensation value, which is used as the compensation for the final calculation of the alternating current intensity, so as to improve the precision of the alternating current measurement; based on this, the first conversion relationship between the total magnetic field magnetic flux and the alternating current intensity corresponding to the to-be-measured circuit can be determined as follows:

[0105]

[0106] Wherein, ε(t) is the induced electromotive force generated by the total magnetic field magnetic flux in the measuring position in the solenoid, Φ B (t) is the total magnetic field magnetic flux, α is a constant related to the position of the solenoid relative to the to-be-measured circuit, and I(t) is the alternating current in the to-be-measured circuit.

[0107] The step S302 comprises obtaining the resistance value, the capacitance value and the capacitance voltage of the auxiliary circuit and determining the alternating current intensity based on the first conversion relationship, the resistance value, the capacitance value, the capacitance voltage and the alternating current compensation value.

[0108] In the embodiment, after the to-be-measured circuit is connected to the measuring conductor, the alternating current in the to-be-measured circuit flows through the measuring conductor, the measuring conductor generates a corresponding magnetic field, the solenoid in the measuring position is affected by the magnetic flux generated by the magnetic field, generates an induced electromotive force, and the induced electromotive force acts on the capacitance voltage formed in the capacitor in the auxiliary circuit, and the alternating current measuring device obtains the capacitance voltage formed in the capacitor in the auxiliary circuit of the solenoid. As Figure 3As shown, the measurement conductor with a circular solenoid shape is connected with the external circuit to be measured, the measurement position is one and is located at the right side of the measurement conductor with a circular solenoid shape, the solenoid is connected with the auxiliary circuit, the auxiliary circuit is an RLC circuit composed of a resistor and a capacitor, U C (t) is the capacitor voltage; the alternating current measurement device acquires the resistance value, the capacitance value and the capacitor voltage of the auxiliary circuit, and determines the alternating current intensity in the circuit to be measured based on the first conversion relationship, the resistance value, the capacitance value, the capacitor voltage and the alternating current compensation value. Specifically, the first conversion relationship is:

[0109]

[0110] The time constant of the RC series in the auxiliary circuit is much larger than the AC period, and the current in the auxiliary circuit can be approximately:

[0111]

[0112] Therefore, the alternating current intensity in the circuit to be measured is:

[0113]

[0114] Wherein, R is the resistance value, C is the capacitance value, and d is a constant, which is the conversion of the induced electromotive force generated by the magnetic flux of the background magnetic field into the alternating current compensation value in the preliminary test.

[0115] The alternating current measurement device of the embodiment converts the induced electromotive force generated by the magnetic flux of the background magnetic field into the alternating current compensation value, as the compensation for the final calculation of the alternating current intensity, and determines the alternating current intensity in the circuit to be measured through the first conversion relationship between the total magnetic flux and the corresponding alternating current intensity of the circuit to be measured, the resistance value, the capacitance value and the capacitor voltage of the auxiliary circuit and the alternating current compensation value, so that the background magnetic flux is considered in the calculation process, avoiding the influence of not considering the background magnetic flux on the alternating current intensity measurement, and improving the precision of the alternating current intensity measurement.

[0116] Further, referring to Figure 6 , Figure 7 and Figure 8 , the third embodiment of the alternating current measurement method is proposed.

[0117] The third embodiment of the alternating current measurement method is different from the first embodiment and the second embodiment of the alternating current measurement method in that the step S20 comprises:

[0118] Step S203, determining the background magnetic flux of the measurement position based on a preset rule;

[0119] In the embodiment, the alternating current measurement device determines the background magnetic flux corresponding to the measurement position based on preset rules. It can be understood that the alternating current measurement device does not need to actually measure the background magnetic flux corresponding to the measurement position, but assumes that the background magnetic flux exists. As shown in Figure 6 The solenoid 1 and the solenoid 2 are respectively located at two different measurement positions, the cross sections of the solenoid 1 and the solenoid 2 are parallel to each other, and the distance between the solenoid 1 and the solenoid 2 is placed close enough so that the magnetic flux generated by the background magnetic field in the solenoid 1 and the solenoid 2 is approximately the same.

[0120] In step S204, the first total magnetic flux in the first measurement position and the second total magnetic flux in the second measurement position are measured by the solenoid and the auxiliary circuit, and the values of the first total magnetic flux and the second total magnetic flux are different.

[0121] In this step, the measurement position includes the first measurement position and the second measurement position, the total magnetic flux includes the first total magnetic flux and the second total magnetic flux, and the alternating current measurement device measures the first total magnetic flux in the first measurement position and the second total magnetic flux in the second measurement position by the solenoid and the auxiliary circuit; as shown in Figure 6 The solenoid 3 is a measurement conductor, the solenoid 3 circumscribes the current to be measured circuit, the measurement position is two, one is above the solenoid 3 as the first measurement position, and one is on the right side of the solenoid 3 as the second measurement position, the solenoid 1 on the first measurement position is connected with the first auxiliary circuit, the first auxiliary circuit is an RLC circuit composed of a resistor R1 and a capacitor C1, U C1 (t) is the capacitor voltage, the solenoid 2 on the second measurement position is connected with the second auxiliary circuit, the second auxiliary circuit is an RLC circuit composed of a resistor R2 and a capacitor C2, U C2 (t) is the capacitor voltage. It should be noted that the greater the difference between the first total magnetic flux in the solenoid 1 and the second total magnetic flux in the solenoid 2, the more significantly the alternating current measurement precision can be improved; the placement positions of the solenoid 1 and the solenoid 2 are not limited to the positions as shown in Figure 6 The first total magnetic flux and the second total magnetic flux are different in value.

[0122] Further, step S204 includes:

[0123] In step S2041, the first coil area and the first coil number of turns of the first solenoid are obtained, and the first total magnetic induction intensity in the first measurement position is determined.

[0124] Step S2042, determining, by the first solenoid and the first auxiliary circuit, a first total magnetic field magnetic flux in the first measurement position based on the first coil area, the first coil turns, and the first total magnetic induction intensity;

[0125] In steps S2041-S2042, the alternating current measurement device acquires the first coil area and the first coil turns of the first solenoid, and determines the first total magnetic induction intensity in the first measurement position; the alternating current measurement device determines the first total magnetic field magnetic flux in the first measurement position based on the first coil area, the first coil turns, and the first total magnetic induction intensity by the first solenoid and the first auxiliary circuit; it can be understood that the first coil area refers to the area of a circle formed by a coil in the first solenoid, the first coil turns refer to the number of turns of the coil in the first solenoid, and the first total magnetic induction intensity in the first measurement position can be determined by measuring devices such as magnetometers; the first total magnetic induction intensity is the vector sum of the background magnetic induction intensity in the first measurement position and the magnetic induction intensity generated by the solenoid of the current to be measured; specifically, after determining the first total magnetic field intensity in the first measurement position, the alternating current measurement device multiplies the first coil area, the first coil turns, and the first total magnetic induction intensity to obtain the first total magnetic field magnetic flux in the first measurement position.

[0126] Step S2043, acquiring the second coil area and the second coil turns of the second solenoid, and determining the second total magnetic induction intensity in the second measurement position;

[0127] Step S2044, determining, by the second solenoid and the second auxiliary circuit, a second total magnetic field magnetic flux in the second measurement position based on the second coil area, the second coil turns, and the second total magnetic induction intensity.

[0128] In steps S2043-S2044, the alternating current measurement device acquires the second coil area and the second coil turns of the second solenoid, and determines the second total magnetic induction intensity in the second measurement position; the alternating current measurement device determines the second total magnetic field magnetic flux in the second measurement position based on the second coil area, the second coil turns, and the second total magnetic induction intensity by the second solenoid and the second auxiliary circuit; it can be understood that the second coil area refers to the area of a circle formed by a coil in the second solenoid, the second coil turns refer to the number of turns of the coil in the second solenoid, and the second total magnetic induction intensity in the second measurement position can be determined by measuring devices such as magnetometers; the second total magnetic induction intensity is the vector sum of the background magnetic induction intensity in the second measurement position and the magnetic induction intensity generated by the solenoid of the current to be measured; specifically, after determining the second total magnetic field intensity in the second measurement position, the alternating current measurement device multiplies the second coil area, the second coil turns, and the second total magnetic induction intensity to obtain the second total magnetic field magnetic flux in the second measurement position.

[0129] Further, step S30 includes:

[0130] Step S303: Determine the second conversion relationship between the first total magnetic field flux, the background magnetic field flux, and the alternating current intensity corresponding to the circuit under test; and determine the third conversion relationship between the second total magnetic field flux, the background magnetic field flux, and the alternating current intensity corresponding to the circuit under test.

[0131] In this embodiment, after determining the first total magnetic field flux, the second total magnetic field flux, and the background magnetic field flux, the alternating current measuring device determines a second conversion relationship between the first total magnetic field flux, the background magnetic field flux, and the alternating current intensity corresponding to the circuit under test, and also determines a third conversion relationship between the second total magnetic field flux, the background magnetic field flux, and the alternating current intensity corresponding to the circuit under test. Specifically, the second conversion relationship is Φ B1 (t)=α1I(t)+Φ a (t), the third conversion relation is Φ B2 (t)=α2I(t)+Φ a (t), where Φ B1 (t) represents the magnetic flux of the first total magnetic field, Φ B2 (t) represents the magnetic flux of the second total magnetic field, Φ a I(t) is the background magnetic flux, I(t) is the alternating current of the circuit under test, and α1 and α2 are constants.

[0132] Step S304: Based on the second conversion relationship, the third conversion relationship, the first total magnetic field flux, the second total magnetic field flux, and the background magnetic field flux, determine the alternating current intensity corresponding to the circuit under test.

[0133] In this embodiment, the alternating current measuring device determines the alternating current intensity corresponding to the circuit under test based on the second conversion relationship, the third conversion relationship, the first total magnetic field flux, the second total magnetic field flux, and the background magnetic field flux; specifically, the second conversion relationship is Φ B1 (t)=α1I(t)+Φ a (t), the third conversion relation is Φ B2 (t)=α2I(t)+Φ a (t), where Φ B1 (t) represents the magnetic flux of the first total magnetic field, Φ B2 (t) represents the magnetic flux of the second total magnetic field, Φ a (t) represents the background magnetic flux, I(t) represents the alternating current of the circuit under test, and α1 and α2 are constants. Then, combining the formula: and We can obtain:

[0134]

[0135] Subtracting the above two formulas, the background magnetic flux Φ a (t) is eliminated, and thus the following can be obtained:

[0136]

[0137] Since the above parameters are known, the alternating current intensity corresponding to the to-be-measured circuit can be calculated.

[0138] The alternating current measurement device of the embodiment determines the conversion relationship between the total magnetic flux, the background magnetic flux, and the alternating current intensity corresponding to the to-be-measured circuit in each measurement position by measuring the total magnetic flux in the two measurement positions and setting the background magnetic flux in the two measurement positions, and then calculates the alternating current intensity corresponding to the to-be-measured circuit through operation, and eliminates the background magnetic flux in the calculation process to avoid the influence of the background magnetic flux on the alternating current intensity measurement, thereby improving the precision of the alternating current intensity measurement.

[0139] The application further provides an alternating current measurement device, which comprises:

[0140] A first determination module, configured to connect a to-be-measured circuit with a measurement conductor and determine a measurement position according to the position of the measurement conductor;

[0141] A second determination module, configured to determine the background magnetic flux corresponding to the measurement position and measure the total magnetic flux in the measurement position through a solenoid and an auxiliary circuit;

[0142] A third determination module, configured to determine the alternating current intensity corresponding to the to-be-measured circuit based on the background magnetic flux and the total magnetic flux.

[0143] Further, the first determination module is further configured to:

[0144] determine the predicted alternating current intensity corresponding to the to-be-measured circuit, determine the measurement conductor based on the predicted alternating current intensity, and connect the to-be-measured circuit with the measurement conductor;

[0145] acquire the shape of the measurement conductor, and determine the measurement position according to a preset measurement position determination rule and the position and shape of the measurement conductor.

[0146] Further, the second determination module is further configured to:

[0147] acquire the coil area and the number of turns of the solenoid, and determine the total magnetic induction intensity in the measurement position;

[0148] Determine the total magnetic field flux in the measurement position based on the coil area, the coil turns and the total magnetic induction intensity through the solenoid and the auxiliary circuit.

[0149] Further, the third determining module is further configured to:

[0150] Determine an alternating current compensation value based on the background magnetic field flux, and determine a first conversion relationship between the total magnetic field flux and an alternating current intensity corresponding to the to-be-measured circuit;

[0151] Obtain the resistance value, the capacitance value and the capacitance voltage of the auxiliary circuit, and determine the alternating current intensity based on the first conversion relationship, the resistance value, the capacitance value, the capacitance voltage and the alternating current compensation value.

[0152] Further, the second determining module is further configured to:

[0153] Determine the background magnetic field flux corresponding to the measurement position based on a preset rule;

[0154] Measure the first total magnetic field flux in the first measurement position and the second total magnetic field flux in the second measurement position through the solenoid and the auxiliary circuit, and the first total magnetic field flux and the second total magnetic field flux have different values.

[0155] Further, the second determining module is further configured to:

[0156] Obtain the first coil area and the first coil turns of the first solenoid, and determine the first total magnetic induction intensity in the first measurement position;

[0157] Determine the first total magnetic field flux in the first measurement position based on the first coil area, the first coil turns and the first total magnetic induction intensity through the first solenoid and the first auxiliary circuit;

[0158] Obtain the second coil area and the second coil turns of the second solenoid, and determine the second total magnetic induction intensity in the second measurement position;

[0159] Determine the second total magnetic field flux in the second measurement position based on the second coil area, the second coil turns and the second total magnetic induction intensity through the second solenoid and the second auxiliary circuit.

[0160] Further, the third determining module is further configured to:

[0161] determining a second conversion relationship between the first total magnetic field magnetic flux, the background magnetic field magnetic flux and the alternating current intensity corresponding to the to-be-measured circuit, and determining a third conversion relationship between the second total magnetic field magnetic flux, the background magnetic field magnetic flux and the alternating current intensity corresponding to the to-be-measured circuit;

[0162] determining the alternating current intensity corresponding to the to-be-measured circuit based on the second conversion relationship, the third conversion relationship, the first total magnetic field magnetic flux, the second total magnetic field magnetic flux and the background magnetic field magnetic flux.

[0163] The application further provides an alternating current measurement system.

[0164] The alternating current measurement system of the application comprises a memory, a processor and an alternating current measurement program stored in the memory and executable on the processor, and the alternating current measurement program, when executed by the processor, implements the steps of the alternating current measurement method as described above.

[0165] The method implemented when the alternating current measurement program executable on the processor is executed can refer to the embodiments of the alternating current measurement method of the application, and will not be described here again.

[0166] The application further provides a computer readable storage medium.

[0167] The computer readable storage medium of the application stores an alternating current measurement program, and the alternating current measurement program, when executed by a processor, implements the steps of the alternating current measurement method as described above.

[0168] The method implemented when the alternating current measurement program executable on the processor is executed can refer to the embodiments of the alternating current measurement method of the application, and will not be described here again.

[0169] It should be noted that, in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or system. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of another identical element in the process, method, article or system including the element.

[0170] The above-mentioned serial numbers of the embodiments of the application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0171] Those skilled in the art can clearly understand the above-mentioned embodiment method can be realized by means of software and the necessary general hardware platform, of course, also can be through hardware, but in many cases the former is the better embodiment. Based on such understanding, the technical solutions of the present application essentially or say the part of the contribution to the prior art can be embodied in the form of software products, the computer software product is stored in a storage medium (such as ROM / RAM, magnetic disc, optical disc) as described above, including a number of instructions to make a terminal device (may be a mobile phone, computer, server, or network equipment, etc.) executes the method described in various embodiments of the present application.

[0172] The above is only the preferred embodiment of the present application, not therefore limit the patent scope of the present application, any equivalent structure or equivalent process transformation using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for measuring alternating current, characterized in that, The alternating current measurement method includes the following steps: Connect the circuit under test to the measuring conductor, and determine the measuring position based on the position of the measuring conductor; The background magnetic flux corresponding to the measurement position is determined, and the total magnetic flux at the measurement position is measured using a solenoid and an auxiliary circuit. The measurement positions include a first measurement position and a second measurement position, and the total magnetic flux includes a first total magnetic flux and a second total magnetic flux. The step of determining the background magnetic flux corresponding to the measurement position and measuring the total magnetic flux at the measurement position using a solenoid and an auxiliary circuit includes: Based on preset rules, the background magnetic flux corresponding to the measurement location is determined; The first total magnetic flux at the first measurement position and the second total magnetic flux at the second measurement position are measured using a solenoid and an auxiliary circuit. The values ​​of the first total magnetic flux and the second total magnetic flux are different. The auxiliary circuit consists of an RLC circuit composed of a resistor R and a capacitor C. Based on the background magnetic field flux and the total magnetic field flux, the alternating current intensity corresponding to the circuit under test is determined; The step of determining the alternating current intensity corresponding to the circuit under test based on the background magnetic field flux and the total magnetic field flux includes: A second conversion relationship is determined between the first total magnetic field flux, the background magnetic field flux, and the alternating current intensity corresponding to the circuit under test. A third conversion relationship is also determined between the second total magnetic field flux, the background magnetic field flux, and the alternating current intensity corresponding to the circuit under test. The second conversion relationship is Φ. B1 (t) The third conversion relationship is Φ B2 (t) , where Φ B1 (t) represents the magnetic flux of the first total magnetic field, Φ B2 (t) represents the magnetic flux of the second total magnetic field. The background magnetic flux. The alternating current of the circuit under test is... and It is a constant; Based on the second conversion relationship, the third conversion relationship, the first total magnetic field flux, the second total magnetic field flux, and the background magnetic field flux, the alternating current intensity corresponding to the circuit under test is determined, wherein the calculation formula for determining the alternating current intensity corresponding to the circuit under test is as follows: in, The resistor in the first RLC circuit is... For the capacitor of the first RLC circuit, U C1 (t) represents the capacitor voltage of the first RLC circuit. The resistor in the second RLC circuit is... For the capacitor of the second RLC circuit, U C2 (t) represents the capacitor voltage of the second RLC circuit.

2. The alternating current measurement method as described in claim 1, characterized in that, The steps of connecting the circuit under test to the measuring conductor and determining the measuring position based on the position of the measuring conductor include: Determine the predicted alternating current intensity corresponding to the circuit under test, determine the measuring conductor based on the predicted alternating current intensity, and connect the circuit under test to the measuring conductor; The shape of the measuring conductor is obtained, and the measuring position is determined according to the preset measuring position determination rules and the position and shape of the measuring conductor.

3. The alternating current measurement method as described in claim 1, characterized in that, The solenoid includes a first solenoid and a second solenoid, the auxiliary circuit includes a first auxiliary circuit and a second auxiliary circuit, and the step of measuring the first total magnetic flux at the first measurement position and the second total magnetic flux at the second measurement position using the solenoid and the auxiliary circuit includes: Obtain the area of ​​the first coil and the number of turns of the first coil of the first solenoid, and determine the first total magnetic induction intensity at the first measurement position; The first total magnetic flux in the first measurement position is determined by the first solenoid and the first auxiliary circuit based on the first coil area, the first coil number of turns, and the first total magnetic induction intensity. Obtain the area of ​​the second coil and the number of turns of the second coil of the second solenoid, and determine the second total magnetic induction intensity at the second measurement position; The second total magnetic flux in the second measurement position is determined by the second solenoid and the second auxiliary circuit based on the area of ​​the second coil, the number of turns of the second coil, and the second total magnetic induction intensity.

4. An alternating current measuring device, characterized in that, The alternating current measuring device includes: The first determining module is used to connect the circuit under test to the measuring conductor and determine the measuring position according to the position of the measuring conductor; The second determining module is used to determine the background magnetic flux corresponding to the measurement position, and to measure the total magnetic flux in the measurement position through a solenoid and an auxiliary circuit, wherein the measurement position includes a first measurement position and a second measurement position; The second determining module is further configured to determine the background magnetic flux corresponding to the measurement location based on preset rules. The first total magnetic flux at the first measurement position and the second total magnetic flux at the second measurement position are measured using a solenoid and an auxiliary circuit. The values ​​of the first total magnetic flux and the second total magnetic flux are different. The auxiliary circuit consists of an RLC circuit composed of a resistor R and a capacitor C. The third determining module is used to determine the alternating current intensity corresponding to the circuit under test based on the background magnetic field flux and the total magnetic field flux. The third determining module is further configured to determine a second conversion relationship between the first total magnetic field flux, the background magnetic field flux, and the alternating current intensity corresponding to the circuit under test, and to determine a third conversion relationship between the second total magnetic field flux, the background magnetic field flux, and the alternating current intensity corresponding to the circuit under test. The second conversion relationship is Φ. B1 (t) The third conversion relationship is Φ B2 (t) , where Φ B1 (t) represents the magnetic flux of the first total magnetic field, Φ B2 (t) represents the magnetic flux of the second total magnetic field. The background magnetic flux. The alternating current of the circuit under test is... and It is a constant; Based on the second conversion relationship, the third conversion relationship, the first total magnetic field flux, the second total magnetic field flux, and the background magnetic field flux, the alternating current intensity corresponding to the circuit under test is determined, wherein the calculation formula for determining the alternating current intensity corresponding to the circuit under test is as follows: in, The resistor in the first RLC circuit is... For the capacitor of the first RLC circuit, U C1 (t) represents the capacitor voltage of the first RLC circuit. The resistor in the second RLC circuit is... For the capacitor of the second RLC circuit, U C2 (t) represents the capacitor voltage of the second RLC circuit.

5. An alternating current measurement system, characterized in that, The alternating current measurement system includes: a memory, a processor, and an alternating current measurement program stored in the memory and executable on the processor. When the alternating current measurement program is executed by the processor, it implements the steps of the alternating current measurement method as described in any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores an alternating current measurement program, which, when executed by a processor, implements the steps of the alternating current measurement method as described in any one of claims 1 to 3.

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