A method for rapid correction of mutual inductor parameter remote measurement

Abstract

The present invention discloses a method for remotely measuring mutual inductor parameters, which belongs to the technical field of mutual inductor calibration, and specifically relates to a method, system, device, and computer-readable storage medium for detecting mutual inductor parameters. A communication connection is established by pairing between a host and a slave; the host generates a drive signal input, inputs the input terminal voltage value into the DC voltage transformer to be tested, and internally detects the effective value of the voltage of the output signal, and transmits the effective value Va of the output terminal voltage to the input terminal of the slave; completes the setting of correction parameters and the reading and processing of measurement data, and outputs the calibration result, so as to avoid measurement errors caused by devices or environment, and does not need to borrow external standard sources before testing, and realizes internal self-healing correction of the measurement system through pairing.

Description

Technical Field

[0001] The invention discloses a method for remotely measuring mutual inductor parameters, which belongs to the technical field of mutual inductor calibration, and specifically relates to a method for remotely measuring mutual inductor parameters, a detection method, a system, a device and a computer-readable storage medium for mutual inductor parameters. Background Art

[0002] Traditional electromagnetic transformer parameter detection is only applicable to close-range testing. For situations where the primary and secondary outlet ports are far apart, the wiring loop can only be split into close-range detection or the detection line can be extended. The split method brings complicated procedures. In addition, the process of restoring the circuit wiring is not only time-consuming but also prone to errors. The traditional rated load extension detection line may cause the measurement accuracy to decrease due to external factors such as changes in the circuit impedance and easy introduction of interference, resulting in inaccurate measurement results. There are also problems such as long time consumption. Based on the existing technology and equipment, it is impossible to quickly detect the parameter ratio, wiring polarity, and angular difference parameters of the electromagnetic transformer at a long distance. At the same time, the existing engineering site will not conduct on-site verification of each transformer. Even if it is verified on-site, its verification accuracy is lower than the factory verification. Therefore, it is necessary to design a new solution to meet the actual detection needs. Summary of the invention

[0003] In order to overcome the above defects such as complex detection process, cumbersome operation, long measurement time, easy mistakes, etc., the present invention provides a method for detecting mutual inductor parameters by using dual-machine pairing, which can quickly realize the rapid measurement of electromagnetic mutual inductor parameter ratio, angle difference, and wiring polarity. The entire test process is within the safe voltage range to ensure life safety. It can be quickly and automatically corrected before detection to avoid the problem of reduced measurement accuracy due to equipment and components.

[0004] The present invention is achieved by adopting the following technical solutions:

[0005] A method for rapid correction and correction of mutual inductor parameter remote measurement, characterized in that the method involves a mutual inductor master and a mutual inductor slave, and comprises the following steps:

[0006] Step 1: Pair the host and slave to establish a communication connection;

[0007] Step 2: The host generates a driving signal input, inputs the input voltage value into the DC voltage transformer to be tested, and detects the effective value of the voltage of the output signal inside the host, and outputs the effective value of the voltage V a Transmitted to the input end of the slave;

[0008] The input voltage value V i=k*Vr*n / N+b; k is the voltage division ratio of the external circuit; Vr is the reference voltage value of the ADC; N is the full-scale value of the ADC; n is the instantaneous value measured by the ADC; b is the zero-point correction value of the ADC circuit;

[0009] Assume that the internal reference voltage changes to ΔVr=d1*Vr; Assume that the external voltage divider ratio changes to Δk=d2*k;

[0010] Then the effective value of the host output voltage is:

[0011] V a =Δk*ΔVr*n k / N+b

[0012] =(d2*k)*(d1*Vr)*n k / N+b

[0013] =(d1*d2)*k*Vr*n k / N+b;

[0014] where n k It is the instantaneous value converted by the internal ADC when measuring the output of the host during calibration;

[0015] Step 3: Based on the input terminal voltage value and the effective value of the output terminal voltage of the host, determine the remote measurement correction factor and calculate the error factor of the voltage transformer under test;

[0016] Where, let the remote measurement correction factor c=d1*d2=(V a -b)*N / (k*Vr*n k ),

[0017] The error factor: e=(V a -V i ) / V a ;

[0018] Step 4: Correct the voltage value of the detection input terminal of the feedback signal detection circuit in the slave detection unit according to the remote measurement correction factor and the error factor to obtain the output voltage effective value V after the slave is sampled. b ;

[0019] The corrected output voltage V b Calculation formula:

[0020] V b =c*k*Vr*n b / N+b+e*n b ;

[0021] =(V a -b)*n b / (nk )+b+e*n b

[0022] where n b It is the instantaneous value converted by the internal ADC when measuring the input port of the slave;

[0023] Step 5: The slave device receives the corrected input voltage V b And the voltage RMS value V transmitted by the host a Make a comparison; complete the setting of calibration parameters and the reading and processing of measurement data, and output the calibration results.

[0024] The step 1 specifically includes: the host and the slave perform handshake pairing signal confirmation via wireless signals; a prompt indicating that calibration can be started after pairing is successful;

[0025] The pairing process is that the host monitors, and the slave sends data signals to the outside through the wireless module at a certain time interval. The data signal includes a frame header, address, key, and command; the host receives the data signal sent by the slave through the wireless module, and authenticates the data signal. When it is confirmed that the address and key match correctly, the host feeds back confirmation information to the slave, and the handshake is successful.

[0026] The above method further includes:

[0027] Step 6: Obtain the angle difference α of the transformer, correct the measured angle difference, and output high-precision angle difference data.

[0028] The step 6 specifically includes:

[0029] Step 6.1: The host sends an angle difference measurement command to the slave, and the slave returns ready after receiving the command; the host starts the drive signal output and starts sending the signal to the slave via wireless at the same time. The slave calculates the angle difference based on the signal collected at the input end, analyzing the moment t1 of the first half-wave peak or valley value and the moment t2 of receiving the wireless signal;

[0030] The calculation formula of the mutual inductor angle difference is: α=2πtf, where t=t2-t1-Δt; Δt is mainly the time difference between the wireless module sending, air transmission, and wireless module receiving and decoding;

[0031] Step 6.2: Correct the time difference Δt according to the remote measurement correction value c of the transformation ratio; the calculation formula of the corrected time difference is: Δt'=c*Δt;

[0032] Step 6.3: Implement angular difference correction to obtain corrected angular difference data;

[0033] Step 6.4: The slave synchronizes the measured transformation ratio, polarity and angle difference results to the master, and the master displays and stores the data.

[0034] A system for remote measurement and rapid correction of mutual inductor parameters, characterized in that it comprises a mutual inductor master and a mutual inductor slave,

[0035] The host and slave are paired to establish a communication connection;

[0036] The host generates a driving signal input, inputs the input terminal voltage value into the DC voltage transformer to be tested, and detects the effective value of the voltage of the output signal inside the host, and outputs the effective value of the voltage V a Transmitted to the input end of the slave;

[0037] The input voltage value V i =k*Vr*n / N+b; k is the voltage division ratio of the external circuit; Vr is the reference voltage value of the ADC; N is the full-scale value of the ADC; n is the instantaneous value measured by the ADC; b is the zero-point correction value of the ADC circuit;

[0038] Assume that the internal reference voltage changes to ΔVr=d1*Vr; Assume that the external voltage divider ratio changes to Δk=d2*k;

[0039] Then the effective value of the host output voltage is:

[0040] V a =Δk*ΔVr*n k / N+b

[0041] =(d2*k)*(d1*Vr)*n k / N+b

[0042] =(d1*d2)*k*Vr*n k / N+b;

[0043] where n k It is the instantaneous value converted by the internal ADC when measuring the output of the host during calibration;

[0044] Based on the input terminal voltage value and the effective value of the output terminal voltage of the host, a remote measurement correction factor is determined and an error factor of the voltage transformer under test is calculated;

[0045] Where, let the remote measurement correction factor c=d1*d2=(V a -b)*N / (k*Vr*n k ),

[0046] The error factor: e=(V a -V i ) / V a ;

[0047] According to the remote measurement correction factor and error factor, the voltage value of the detection input terminal of the feedback signal detection circuit in the slave detection unit is corrected to obtain the output voltage effective value V after the slave is sampled. b ;

[0048] The corrected output voltage V b Calculation formula:

[0049] V b =c*k*Vr*n b / N+b+e*n b ;

[0050] =(V a -b)*n b / (n k )+b+e*n b

[0051] where n b It is the instantaneous value converted by the internal ADC when measuring the input port of the slave;

[0052] The slave device is based on the corrected input voltage effective value V b And the voltage RMS value V transmitted by the host a Make a comparison; complete the setting of calibration parameters and the reading and processing of measurement data, and output the calibration results.

[0053] The detection device used to perform the above-mentioned method for long-distance measurement and rapid correction of mutual inductor parameters is a pair of mutual inductor detection devices, one of which is a master device and the other is a slave device;

[0054] The transformer detection terminal comprises a wireless communication unit, a power management unit, an operation control unit, a touch display unit, a detection unit, a USB interface unit, an output interface and an input interface; wherein the operation control unit is electrically connected to the wireless communication unit, the power management unit, the touch display unit, the detection unit and the USB interface unit respectively; the detection unit comprises a signal generation drive circuit, a source signal detection circuit and a feed signal detection circuit; the drive signal of the signal generation drive circuit is connected to the outside through the output interface, and the source signal detection circuit is connected to the signal generation drive circuit at the input interface for measuring the data of the signal output; the feed signal detection circuit is connected to the input interface, and the feed signal detection circuit measures the data input from the outside through the input interface; the USB interface unit adopts a Type-C interface externally for monitoring the terminal charging power input, device software upgrade and parameter reading interface;

[0055] The wireless signal of the wireless communication unit transmits or receives wireless signals into the air through the communication antenna; the wireless communication unit is used for dual-machine communication, confirmation signal and data transmission, and the confirmation signal is mainly for pairing confirmation identity and time synchronization confirmation; the power management unit manages the charging and discharging management of the internal power supply and battery of the terminal; the operation control unit is used to control and coordinate the operation of each unit module of the entire system and data calculation and processing; the touch display unit is used for human-computer interaction, displaying detection steps and data, control buttons and system parameter settings; the detection unit includes a signal generation drive circuit, a source signal detection circuit and a feedback signal detection circuit; the signal generation drive circuit generates an intermediate frequency drive signal for exciting the measured transformer; the source signal detection circuit is used to detect the primary side drive signal of the measured transformer; the source signal detection circuit is used to measure the secondary side feedback signal of the measured transformer; the detection unit feeds back the primary side signal data of the measured transformer and the secondary side signal data of the measured mutual inductance to the operation control unit, and the measured transformer ratio, wiring polarity and angle difference data results can be obtained through operation and comparison.

[0056] A computer-readable medium stores a computer program for wireless communication, wherein the computer program enables a computer to execute the method for rapid correction and revision of mutual inductor parameter remote measurement.

[0057] The present invention has the following advantages:

[0058] 1. Pairing calibration method to avoid measurement errors caused by devices or environment. No external standard source is needed before testing. Pairing can realize internal self-healing calibration of the measurement system.

[0059] 2. Use the pairing method to quickly and accurately measure the transformer ratio, wiring polarity and angle difference when the transformer is far away from the outgoing line. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 : Schematic diagram of the connection structure of the internal components of the mutual inductor detection terminal used in the present invention.

[0061] Figure 2 : A schematic diagram of pairing correction of the rapid correction method for pairing the host and the slave in the present invention.

[0062] Figure 3 : A flow chart of a method for rapid correction and correction of mutual inductor parameters over long distance measurement in a specific implementation manner of the present invention.

[0063] Figure 4 : Another flow chart of a method for rapid correction and correction of mutual inductor parameter remote measurement in a specific implementation manner of the present invention.

[0064] Figure 5: Schematic diagram of on-site use of the method for detecting parameters of dual-machine paired remote mutual inductors in the present invention. DETAILED DESCRIPTION

[0065] See attached Figure 1-2 A method for remotely measuring mutual inductor parameters uses a pair of mutual inductor detection terminals as detection equipment, one of which is a host and the other is a slave.

[0066] The transformer detection terminal comprises a wireless communication unit (1), a power management unit (2), an operation control unit (3), a touch display unit (4), a detection unit (5), a USB interface unit (6), an output interface (7) and an input interface (8); wherein the operation control unit (3) is electrically connected to the wireless communication unit (1), the power management unit (2), the touch display unit (4), the detection unit (5) and the USB interface unit (6); the detection unit (5) comprises a signal generation drive circuit (5-1), a source signal detection circuit (5-2) and a feed signal detection circuit (5-3); the drive signal of the signal generation drive circuit (5-1) is connected to the outside through the output interface (7); the source signal detection circuit (5-2) is connected to the signal generation drive circuit (5-1) at the input interface (7) for measuring the data of the signal output; the feed signal detection circuit (5-3) is connected to the input interface (8); the feed signal detection circuit (5-3) measures the data input from the outside through the input interface (8); the USB interface unit (6) adopts a Type-C interface for monitoring the terminal charging power input, device software upgrade and parameter reading interface;

[0067] The wireless communication unit (1) transmits wireless signals to the air or receives wireless signals through the communication antenna (9); the wireless communication unit (1) is used for two-machine communication, confirmation signals and data transmission, and the confirmation signals are mainly for pairing confirmation identity and time synchronization confirmation; the power management unit (2) manages the power supply inside the terminal and the charging and discharging management of the battery; the operation control unit (3) is used to control and coordinate the operation of each unit module of the entire system and data calculation and processing; the touch display unit (4) is used for human-computer interaction, displaying detection steps and data, control buttons and system parameter settings; the detection unit (5) includes The invention comprises a signal generating drive circuit (5-1), a source signal detection circuit (5-2) and a feedback signal detection circuit (5-3); the signal generating drive circuit (5-1) generates an intermediate frequency drive signal for exciting a transformer under test; the source signal detection circuit (5-2) is used to detect the primary drive signal of the transformer under test (12); the source signal detection circuit (5-2) is used to measure the secondary feedback signal of the transformer under test (12); the detection unit (5) feeds back the primary signal data and the secondary signal data to the operation control unit (3), and the transformation ratio, wiring polarity and angle difference data of the transformer under test can be obtained through operation and comparison.

[0068] As attached Figure 3 As shown, a method for rapid correction and correction of mutual inductor parameter remote measurement includes the following steps:

[0069] Step 1: Pair the host and slave to establish a communication connection;

[0070] Step 2: The host generates a driving signal input, inputs the input voltage value into the DC voltage transformer to be tested, and detects the effective value of the voltage of the output signal inside the host, and outputs the effective value of the voltage V a Transmitted to the input end of the slave;

[0071] The input voltage value V i =k*Vr*n / N+b; k is the voltage division ratio of the external circuit; Vr is the reference voltage value of the ADC; N is the full-scale value of the ADC; n is the instantaneous value measured by the ADC; b is the zero-point correction value of the ADC circuit;

[0072] Assume that the internal reference voltage changes to ΔVr=d1*Vr; Assume that the external voltage divider ratio changes to Δk=d2*k;

[0073] Then the effective value of the host output voltage is:

[0074] V a =Δk*ΔVr*n k / N+b

[0075] =(d2*k)*(d1*Vr)*n k / N+b

[0076] =(d1*d2)*k*Vr*n k / N+b;

[0077] where n k It is the instantaneous value converted by the internal ADC when measuring the output of the host during calibration;

[0078] Step 3: Based on the input terminal voltage value and the effective value of the output terminal voltage of the host, determine the remote measurement correction factor and calculate the error factor of the voltage transformer under test;

[0079] Where, let the remote measurement correction factor c=d1*d2=(V a -b)*N / (k*Vr*n k ),

[0080] The error factor: e=(V a -V i ) / V a ;

[0081] Step 4: Correct the voltage value of the detection input terminal of the feedback signal detection circuit in the slave detection unit according to the remote measurement correction factor and the error factor to obtain the output voltage effective value V after the slave is sampled. b ;

[0082] The corrected output voltage V b Calculation formula:

[0083] V b =c*k*Vr*n b / N+b+e*n b ;

[0084] =(V a -b)*n b / (n k )+b+e*n b

[0085] where n b It is the instantaneous value converted by the internal ADC when measuring the input port of the slave;

[0086] Step 5: The slave device receives the corrected input voltage V b And the voltage RMS value V transmitted by the host a Make a comparison; complete the setting of calibration parameters and the reading and processing of measurement data, and output the calibration results.

[0087] The step 1 specifically includes: the host and the slave perform handshake pairing signal confirmation via wireless signals; a prompt indicating that calibration can be started after pairing is successful;

[0088] The pairing process is that the host monitors, and the slave sends data signals to the outside through the wireless module at a certain time interval. The data signal includes a frame header, address, key, and command; the host receives the data signal sent by the slave through the wireless module, and authenticates the data signal. When it is confirmed that the address and key match correctly, the host feeds back confirmation information to the slave, and the handshake is successful.

[0089] As attached Figure 4 As shown, the above method also includes:

[0090] Step 6: Obtain the angle difference α of the transformer, correct the measured angle difference, and output high-precision angle difference data.

[0091] The step 6 specifically includes:

[0092] Step 6.1: The host sends an angle difference measurement command to the slave, and the slave returns ready after receiving the command; the host starts the drive signal output and starts sending the signal to the slave via wireless at the same time. The slave calculates the angle difference based on the signal collected at the input end, analyzing the moment t1 of the first half-wave peak or valley value and the moment t2 of receiving the wireless signal;

[0093] The calculation formula of the mutual inductor angle difference is: α=2πtf, where t=t2-t1-Δt; Δt is mainly the time difference between the wireless module sending, air transmission, and wireless module receiving and decoding;

[0094] Step 6.2: Correct the time difference Δt according to the remote measurement correction value c of the transformation ratio; the calculation formula of the corrected time difference is: Δt'=c*Δt;

[0095] Step 6.3: Implement angular difference correction to obtain corrected angular difference data;

[0096] Step 6.4: The slave synchronizes the measured transformation ratio, polarity and angle difference results to the master, and the master displays and stores the data.

[0097] As attached Figure 5 As shown, a system for remote measurement and rapid correction of mutual inductor parameters comprises: a mutual inductor master and a mutual inductor slave,

[0098] The host and slave are paired to establish a communication connection;

[0099] The host generates a driving signal input, inputs the input terminal voltage value into the DC voltage transformer to be tested, and detects the effective value of the voltage of the output signal inside the host, and outputs the effective value of the voltage V a Transmitted to the input end of the slave;

[0100] The input voltage value V i =k*Vr*n / N+b; k is the voltage division ratio of the external circuit; Vr is the reference voltage value of the ADC; N is the full-scale value of the ADC; n is the instantaneous value measured by the ADC; b is the zero-point correction value of the ADC circuit;

[0101] Assume that the internal reference voltage changes to ΔVr=d1*Vr; Assume that the external voltage divider ratio changes to Δk=d2*k;

[0102] Then the effective value of the host output voltage is:

[0103] V a =Δk*ΔVr*n k / N+b

[0104] =(d2*k)*(d1*Vr)*n k / N+b

[0105] =(d1*d2)*k*Vr*n k / N+b;

[0106] where n k It is the instantaneous value converted by the internal ADC when measuring the output of the host during calibration;

[0107] Based on the input terminal voltage value and the effective value of the output terminal voltage of the host, a remote measurement correction factor is determined and an error factor of the voltage transformer under test is calculated;

[0108] Where, let the remote measurement correction factor c=d1*d2=(V a -b)*N / (k*Vr*n k ),

[0109] The error factor: e=(V a -V i ) / V a ;

[0110] According to the remote measurement correction factor and error factor, the voltage value of the detection input terminal of the feedback signal detection circuit in the slave detection unit is corrected to obtain the output voltage effective value V after the slave is sampled. b ;

[0111] The corrected output voltage V b Calculation formula:

[0112] V b =c*k*Vr*n b / N+b+e*n b ;

[0113] =(V a -b)*n b / (n k )+b+e*n b

[0114] where n b It is the instantaneous value converted by the internal ADC when measuring the input port of the slave;

[0115] The slave device adjusts the input voltage V according to the corrected input voltage V b And the voltage RMS value V transmitted by the host a Make a comparison; complete the setting of calibration parameters and the reading and processing of measurement data, and output the calibration results.

[0116] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0117] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0118] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0119] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0120] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for rapid calibration and correction of mutual inductor parameters by remote measurement, characterized in that: The method involves a transformer master and a transformer slave, and comprises the following steps: Step 1: Pair the host and slave to establish a communication connection; Step 2: The host generates a drive signal input, inputs the host input voltage value to the input end of the DC voltage transformer under test, and detects the effective value of the output signal voltage inside the host, and outputs the effective value of the output voltage V a Transmitted to the input end of the slave; The input voltage value V i =k*Vr*n / N+b; k is the voltage division ratio of the external circuit; Vr is the reference voltage value of the ADC; N is the full-scale value of the ADC; n is the instantaneous value measured by the ADC; b is the zero-point correction value of the ADC circuit; Assume that the internal reference voltage changes to ΔVr=d1*Vr; Assume that the external voltage divider ratio changes to Δk=d2*k; Then the effective value of the host output voltage is: V a =Δk*ΔVr*n k / N+b =(d2*k)*(d1*Vr)*nk / N+b =(d1*d2)*k*Vr*n k / N+b Where n k It is the instantaneous value converted by the internal ADC when measuring the output of the host during calibration; Step 3: Based on the input terminal voltage value and the effective value of the output terminal voltage of the host, determine the remote measurement correction factor and calculate the error factor of the voltage transformer under test; Where, let the remote measurement correction factor c=d1*d2=(V a -b)*N / (k*Vr*n k ), The error factor: e=(V a -V i ) / V a ; Step 4: According to the remote measurement correction factor and the error factor, the voltage value of the input terminal of the slave detected by the feedback signal detection circuit in the slave detection unit is corrected to obtain the output voltage effective value V after the slave is sampled. b ; The corrected output voltage V b Calculation formula: V b =c*k*Vr*n b / N+b+e*n b ; =(V a -b)*n b / (n k )+b+e*n b where n b It is the instantaneous value converted by the internal ADC when measuring the input port of the slave; Step 5: The slave device receives the corrected input voltage V b And the voltage RMS value V transmitted by the host a Make a comparison; complete the setting of calibration parameters and the reading and processing of measurement data, and output the calibration results.

2. The method for rapid correction and correction of mutual inductor parameter remote measurement according to claim 1, characterized in that: The step 1 specifically includes: The host and slave use wireless signals to handshake and confirm pairing signals; if pairing is successful, it will prompt that calibration can begin; The pairing process is that the host monitors, and the slave sends data signals to the outside through the wireless module at a certain time interval. The data signal includes a frame header, address, key, and command; the host receives the data signal sent by the slave through the wireless module, and authenticates the data signal. When it is confirmed that the address and key match correctly, the host feeds back confirmation information to the slave, and the handshake is successful.

3. The method for rapid calibration and correction of mutual inductor parameter remote measurement according to claim 1, characterized in that: The method further comprises: Step 6: Obtain the angle difference α of the transformer, correct the measured angle difference, and output high-precision angle difference data.

4. The method for rapid calibration and correction of mutual inductor parameter remote measurement according to claim 3, characterized in that: The step 6 specifically includes: Step 6.1: The host sends an angle difference measurement command to the slave, and the slave returns ready after receiving the command; the host starts the drive signal output and starts sending the signal to the slave via wireless at the same time. The slave calculates the angle difference based on the signal collected at the input end, analyzing the moment t1 of the first half-wave peak or valley value and the moment t2 of receiving the wireless signal; The calculation formula of the mutual inductor angle difference is: α=2πtf, where t=t2-t1-Δt; Δt is mainly the time difference between the wireless module sending, air transmission, and wireless module receiving and decoding; Step 6.2: Correct the time difference Δt according to the remote measurement correction value c of the transformation ratio; the calculation formula of the corrected time difference is: Δt'=c*Δt; Step 6.3: Implement angular difference correction to obtain corrected angular difference data; Step 6.4: The slave synchronizes the measured transformation ratio, polarity and angle difference results to the master, and the master displays and stores the data.

5. A system for long-distance measurement and rapid correction of mutual inductor parameters, characterized in that: Including transformer master and transformer slave, The host and slave are paired to establish a communication connection; The host generates a driving signal input, inputs the host input voltage value into the input end of the DC voltage transformer to be tested, and detects the effective value of the output signal voltage inside the host, and outputs the effective value of the output voltage V a Transmitted to the input end of the slave; The input voltage value V i =k*Vr*n / N+b; k is the voltage division ratio of the external circuit; Vr is the reference voltage value of the ADC; N is the full-scale value of the ADC; n is the instantaneous value measured by the ADC; b is the zero-point correction value of the ADC circuit; Assume that the internal reference voltage changes to ΔVr=d1*Vr; Assume that the external voltage divider ratio changes to Δk=d2*k; Then the effective value of the host output voltage is: V a =Δk*ΔVr*n k / N+b =(d2*k)*(d1*Vr)*n k / N+b =(d1*d2)*k*Vr*n k / N+b; where n k It is the instantaneous value converted by the internal ADC when measuring the output of the host during calibration; Based on the input terminal voltage value and the effective value of the output terminal voltage of the host, a remote measurement correction factor is determined and an error factor of the voltage transformer under test is calculated; Where, let the remote measurement correction factor c=d1*d2=(V a -b)*N / (k*Vr*n k ), The error factor: e=(V a -V i ) / V a ; According to the remote measurement correction factor and the error factor, the voltage value of the input terminal of the slave detected by the feedback signal detection circuit in the slave detection unit is corrected to obtain the output voltage effective value V after sampling by the slave. b ; The corrected output voltage V b Calculation formula: V b =c*k*Vr*n b / N+b+e*n b ; =(Va-b)*n b / (n k )+b+e*n b Where n b It is the instantaneous value converted by the internal ADC when measuring the input port of the slave; The slave device is based on the corrected input voltage effective value V b And the voltage RMS value V transmitted by the host a Make a comparison; complete the setting of calibration parameters and the reading and processing of measurement data, and output the calibration results.

6. A system for rapid calibration and correction of mutual inductor parameters remotely measured according to claim 5, characterized in that: The host and slave use wireless signals to handshake and confirm pairing signals; if pairing is successful, it will prompt that calibration can begin; The pairing process is that the host monitors, and the slave sends data signals to the outside through the wireless module at a certain time interval. The data signal includes a frame header, address, key, and command; the host receives the data signal sent by the slave through the wireless module, and authenticates the data signal. When it is confirmed that the address and key match correctly, the host feeds back confirmation information to the slave, and the handshake is successful.

7. The system for long-distance measurement and rapid correction of mutual inductor parameters according to claim 5, characterized in that: The slave is also used to obtain the angle difference α of the mutual inductor, correct the measured angle difference, and output high-precision angle difference data.

8. A system for long-distance measurement and rapid correction of mutual inductor parameters according to claim 7, characterized in that: The host sends an angle difference measurement command to the slave, and the slave returns ready after receiving the command; the host starts the drive signal output and starts sending the signal to the slave via wireless at the same time. The slave calculates the angle difference based on the signal collected at the input end, analyzing the moment t1 of the first half-wave peak or valley value and the moment t2 of receiving the wireless signal; The calculation formula of the mutual inductor angle difference is: α=2πtf, where t=t2-t1-Δt; Δt is mainly the time difference between the wireless module sending, air transmission, and wireless module receiving and decoding; The time difference Δt is corrected according to the remote measurement correction value c of the transformation ratio; the calculation formula of the corrected time difference is: Δt'=c*Δt; Implement angular difference correction to obtain corrected angular difference data; The slave synchronizes the measured transformation ratio, polarity and angle difference results to the master, which displays and stores the data.

9. The detection device used to perform the method for rapid correction and correction of a mutual inductor parameter remote measurement according to any one of claims 1 to 4 is a pair of mutual inductor detection devices, one of which is a master and the other is a slave; The mutual inductor detection device includes a wireless communication unit, a power management unit, an operation control unit, a touch display unit, a detection unit, a USB interface unit, an output interface and an input interface; wherein the operation control unit is electrically connected to the wireless communication unit, the power management unit, the touch display unit, the detection unit and the USB interface unit respectively; the detection unit includes a signal generation drive circuit, a source signal detection circuit and a feed signal detection circuit; the drive signal of the signal generation drive circuit is connected to the outside through the output interface, and the source signal detection circuit is connected to the signal generation drive circuit at the input interface for measuring the data output by the signal; the feed signal detection circuit is connected to the input interface, and the feed signal detection circuit measures the data input from the outside through the input interface; the USB interface unit adopts a Type-C interface externally for monitoring the terminal charging power input, device software upgrade and parameter reading interface; The wireless signal of the wireless communication unit transmits or receives wireless signals into the air through the communication antenna; the wireless communication unit is used for dual-machine communication, confirmation signal and data transmission, and the confirmation signal is mainly for pairing confirmation identity and time synchronization confirmation; the power management unit manages the charging and discharging management of the internal power supply and battery of the terminal; the operation control unit is used to control and coordinate the operation of each unit module of the entire system and data calculation and processing; the touch display unit is used for human-computer interaction, displaying detection steps and data, control buttons and system parameter settings; the detection unit includes a signal generation drive circuit, a source signal detection circuit and a feedback signal detection circuit; the signal generation drive circuit generates an intermediate frequency drive signal for exciting the measured transformer; the source signal detection circuit is used to detect the primary side drive signal of the measured transformer; the source signal detection circuit is used to measure the secondary side feedback signal of the measured transformer; the detection unit feeds back the primary side signal data of the measured transformer and the secondary side signal data of the measured mutual inductance to the operation control unit, and the measured transformer ratio, wiring polarity and angle difference data results can be obtained through operation and comparison.

10. A computer-readable medium storing a computer program for wireless communication, wherein the computer program enables a computer to execute the method for rapid correction and revision of mutual inductor parameter remote measurement according to any one of claims 1 to 4.

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