Multifunctional wireless nuclear phase device

Abstract

The invention provides a multifunctional wireless nuclear phase device, which relates to the technical field of voltage nuclear phase, and is characterized in that a slave computer and a host computer are respectively and directly hung on a grid-connected reference equipment power line and a grid-connected to-be-tested equipment power line under the condition that equipment is powered off, and the slave computer and the host computer are in wireless communication; after the equipment is electrified, the phases of the reference equipment power line and the to-be-tested equipment power line are automatically detected, the phase information obtained by the slave is wirelessly sent to the host, the host calculates the phase difference to obtain a phase checking result, and during phase checking, an operator does not need to contact a phase checking device, so that the phase checking safety is improved. At least two wireless communication modules suitable for transmission at different distances are arranged in each of the slave machine and the host machine, so that the phase checking device can be suitable for efficient and safe phase checking in various scenes of indoor and outdoor close distance, long distance, primary phase checking and secondary phase checking, and the phase checking function of one phase checking device in various scenes is realized.

Description

Technical Field

[0001] The invention relates to the technical field of voltage phase core technology, and in particular to a multifunctional wireless phase core device. Background Art

[0002] In order to avoid accidents and provide users with high-quality electricity, in the power supply network composed of three-phase power supply, phase checking is carried out before each new device is connected to the grid to ensure that the phases and phase sequence are the same before connecting to the grid. Phase checking is very important to ensure the safety, stability and reliability of the system.

[0003] Voltage phase checking is an important basic work in the production and operation of power grids. The current phase checking method is to compare the secondary voltage of the new equipment with the secondary voltage of a selected operating equipment in the substation to check whether the secondary circuit of the AC voltage is correct. If there is an error, the new equipment will not be allowed to connect to the system with load. At present, the phase checking work is divided into primary phase checking and secondary phase checking. The primary phase checking refers to the method of using a special high-voltage phase checking device to directly check whether the phase of the voltage on two same-name phase conductors is the same on the primary side of the high voltage using a special high-voltage phase checking device. At present, the commonly used primary phase checking uses a wired method to place the phase checking device on the high-voltage power line at the end to be measured and the reference end. When the phase checking is powered on, it is necessary to contact the phase checking device, which is more dangerous. Secondary phase checking refers to the method of checking the phase sequence using a phase checking instrument or other measuring equipment on the secondary side of the power system, which is mainly completed by measuring with the help of a multimeter measuring equipment. Different phase checking equipment is often used for primary and secondary phase checking. Whether it is primary phase checking or secondary phase checking, if the distance between the two devices to be checked is too far, it is very troublesome to check the phase by lead wire, and long-distance phase checking is difficult.

[0004] Based on this, the present invention is proposed. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a multifunctional wireless phase checking device, which can efficiently and safely complete short-range and long-range phase checking indoors and outdoors and adapt to a variety of scenarios.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A multifunctional wireless phase-check device comprises: a host and a slave; the host is electrically connected to a reference device circuit, and the slave is electrically connected to a circuit of a device to be tested; both the host and the slave are built with at least two wireless communication modules suitable for transmission at different distances, and the host and the slave transmit data via the wireless communication modules;

[0008] The slave includes: a first phase detection module, at least used for sampling and detecting the phase data of the reference device line; a first voltage detection module, at least used for sampling and detecting the voltage data of the reference device line; a first analysis and processing module, at least used for analyzing and processing the phase data obtained by the first phase detection module and / or the voltage data obtained by the first voltage detection module, and obtaining the phase information of the reference device line and sending it to the host;

[0009] Among them, the host includes: a second phase detection module, which is at least used to detect the phase data of the line of the device to be tested; a second voltage detection module, which is at least used to detect the voltage data of the line of the device to be tested; a second analysis and processing module, which is at least used to analyze and process the phase data obtained by the second phase detection module and / or the voltage data obtained by the first voltage detection module, obtain the phase information of the line of the device to be tested, and combine the phase information of the reference device line sent from the slave, calculate the phase difference, and obtain the phase verification result.

[0010] In order to adapt to the operating habits of workers who use a multimeter to check the phase of low-voltage equipment, the present invention provides a preferred solution, wherein the host and / or slave are also configured with a voltage measuring pen, a DC voltage measuring module and an AC voltage measuring module; the voltage measuring pen detects the DC / AC voltage signal of the circuit of the device to be tested / the reference device circuit, and obtains corresponding voltage data after processing by the DC voltage measuring module / the AC voltage measuring module, thereby retaining the function of using the voltage measuring pen of the multimeter to check the phase, and only retaining the AC / DC voltage measurement function, thereby avoiding the cumbersomeness of using a traditional multimeter to check the phase due to incorrect gear setting or lead-out.

[0011] In order to further adapt to the different distances between the reference device and the device under test, the present invention provides a preferred solution, wherein the wireless communication module includes a LoRa module and a 4G / 5G module.

[0012] In order to further improve the phase verification accuracy, the present invention provides a preferred solution, wherein the slave also includes: a first timing module, used to record the sampling time and sampling frequency of the slave sampling the reference device line and send them to the host; the host also includes: a second timing module, used to record the sampling time and sampling frequency of the host sampling the device line to be tested; a time synchronization module, used to obtain the transmission delay and sampling time difference between the slave and the host according to the sampling time and sampling frequency of the host and the slave, and adjust the sampling time of the host according to the transmission delay and sampling time difference to synchronize with the sampling time of the slave.

[0013] In order to further accurately obtain the phase difference, the present invention provides a preferred solution, wherein the first phase detection module includes a first zero-crossing point detection submodule, which is used to detect and record the zero-crossing point of the reference device line voltage and send it to the host; the second phase detection module includes a second zero-crossing point detection submodule, which is used to detect and record the zero-crossing point of the line voltage of the device to be tested; the second analysis and processing module compares the zero-crossing point of the reference device line voltage with the zero-crossing point of the line voltage of the device to be tested to obtain the phase difference between the line voltage of the device to be tested and the line voltage of the reference device.

[0014] In order to facilitate signal processing and transmission, simplify the processing process, improve the phase checking speed, and adapt to the phase checking of different voltage levels, the present invention provides a preferred solution, wherein the first phase detection module also includes a first signal conditioning submodule, which is used to convert the acquired sinusoidal wave signal of the reference device line voltage into a square wave signal, and then send it to the first zero-crossing detection submodule; the second phase detection module also includes a second signal conditioning submodule, which is used to convert the acquired sinusoidal wave signal of the device line voltage to be tested into a square wave signal, and then send it to the second zero-crossing detection submodule.

[0015] Compared with the prior art, the above technical solution has the following advantages:

[0016] The multifunctional wireless phase checking device of the present invention is directly connected to the grid-connected reference device power line and the grid-connected device power line through a slave and a host when the device is powered off. The slave and the host communicate wirelessly. After the device is powered on, the slave and the host automatically detect the phase of the reference device power line and the grid-connected device power line. The phase information obtained by the slave is wirelessly sent to the host. The host calculates the phase difference to obtain the phase checking result. When checking the phase, the operator does not need to touch the phase checking device, which improves the safety of the phase checking. At the same time, since at least two wireless communication modules suitable for transmission at different distances are provided in the slave and the host, it can be applied to efficient and safe phase checking in various scenarios such as indoor and outdoor short-distance, long-distance, primary phase checking and secondary phase checking, realizing the phase checking function of a phase checking device in various scenarios, that is, realizing multi-functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the connection between the host and the slave in the multifunctional wireless phase-locking device of Example 1 of the present invention;

[0019] Figure 2 This is an internal module diagram of a slave in a multifunctional wireless phase-locking device according to embodiment 1 of the present invention;

[0020] Figure 3 This is an internal module diagram of the host in the multifunctional wireless phase detection device of Example 1 of the present invention;

[0021] Figure 4 This is a schematic diagram of a voltage measuring pen carried by a host and a slave in a multifunctional wireless phase-conversion device according to embodiment 2 of the present invention;

[0022] Figure 5 This is an internal module diagram of a DC voltage measurement module in a multifunctional wireless phase-detection device according to embodiment 2 of the present invention;

[0023] Figure 6 This is an internal module diagram of an AC voltage measurement module in a multifunctional wireless phase-detection device according to Embodiment 2 of the present invention;

[0024] Figure 7 This is an internal module diagram of a slave in a multifunctional wireless phase-locking device according to embodiment 3 of the present invention;

[0025] Figure 8 This is an internal module diagram of the host in the multifunctional wireless phase detection device of Example 3 of the present invention;

[0026] Fig. 9 A schematic diagram of a method for obtaining the transmission delay between the host and the slave in the multifunctional wireless phase-locking device of embodiment 3 of the present invention;

[0027] Fig.10 Schematic diagram of a method for calibrating the synchronization of sampling moments of a host and a slave in a multifunctional wireless phase detection device according to embodiment 3 of the present invention.

[0028] The accompanying drawings are marked as follows: reference device circuit 100, device circuit to be tested 200, slave 300, first phase detection module 310, first voltage detection module 320, first analysis and processing module 330, first wireless communication module 341, second wireless communication module 342, first sound and light reminder module 350, first LED light 351, first buzzer 352, first rechargeable battery 361, first power conversion module 362, first human-computer interaction module 370, first display screen 371, first button 372, first timing module 381, host 400, second phase detection module 410, second voltage detection module 420, second analysis and processing module 430. 0, a third wireless communication module 441, a fourth wireless communication module 442, a second sound and light reminder module 450, a second LED light 451, a second buzzer 452, a second rechargeable battery 461, a second power conversion module 462, a second human-computer interaction module 470, a second display screen 471, a second button 472, a second timing module 481, a time synchronization module 482, a DC voltage measurement module 510, a first voltage dividing unit 511, a first A / D conversion unit 512, an AC voltage measurement module 520, a second voltage dividing unit 521, a second A / D conversion unit 522, a rectifier unit 523, a DC conversion unit 524, and a voltage measurement pen 530. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] Please refer to Figure 1 A multifunctional wireless phase-checking device of this embodiment includes: a host 400 and a slave 300; the host 400 is electrically connected to a reference device circuit 100, and the slave 300 is electrically connected to a device circuit 200 to be tested; the host 400 and the slave 300 are both built with two wireless communication modules suitable for transmission at different distances, and the host 400 and the slave 300 transmit data through the wireless communication modules;

[0032] Please refer to Figure 2, the slave 300 of this embodiment is mainly composed of the following modules: a first phase detection module 310, which is used to sample and detect the phase data of the reference device line 100; a first voltage detection module 320, which is used to sample and detect the voltage data of the reference device line 100; a first analysis and processing module 330, which is used to analyze and process the phase data obtained by the first phase detection module 310 and / or the voltage data obtained by the first voltage detection module 320, and obtain the phase information of the reference device line 100 and send it to the host 400. On this basis, the slave 300 of this embodiment is also configured with a first rechargeable battery 361 as the power supply of the slave 300; a first power conversion module 362, which is used to convert the voltage provided by the first rechargeable battery 361 into the working voltage required by each module in the slave 300. The rechargeable battery provides power for the entire device, and the power stored in the battery pack can meet the test requirements of the test personnel for one day. It is preferred to use a lithium battery, which is not easily affected by the on-site test environment. At the same time, if the lithium battery power is too low, the device can be directly powered by an external power supply for normal testing.

[0033] Please refer to Figure 3 The host 400 of this embodiment is mainly composed of the following modules: a second phase detection module 410, used to detect the phase data of the device line 200 under test; a second voltage detection module 420, used to detect the voltage data of the device line 200 under test; a second analysis and processing module 430, used to analyze and process the phase data obtained by the second phase detection module 410 and / or the voltage data obtained by the first voltage detection module 320, obtain the phase information of the device line 200 under test, and calculate the phase difference in combination with the phase information of the reference device line 100 sent from the slave 300, and obtain the phase check result. On this basis, the host 400 of this embodiment is also configured with a second rechargeable battery 461 as the power source of the host 400; a second power conversion module 462, used to convert the voltage provided by the second rechargeable battery 461 into the working voltage required by each module in the host 400.

[0034] The multifunctional wireless phase checking device of this embodiment is directly connected to the power line of the reference device connected to the grid and the power line of the device to be tested to be connected to the grid through a slave 300 and a host 400 when the device is powered off. Wireless communication is carried out between the slave 300 and the host 400. After the device is powered on, the slave 300 and the host 400 automatically detect the phase of the reference device power line and the device to be tested power line respectively. The phase information obtained by the slave 300 is wirelessly sent to the host 400. The host 400 calculates the phase difference to obtain the phase checking result. When checking the phase, the operator does not need to touch the phase checking device, thereby improving the safety of the phase checking. At the same time, since both the slave machine 300 and the host machine 400 are provided with two wireless communication modules suitable for transmission at different distances, in some preferred embodiments, the LoRa module and the 4G / 5G module can be used for the two wireless communication modules, that is, the first wireless communication module 341 and the first wireless communication module 342 of the slave machine 300 respectively adopt the LoRa module and the 4G / 5G module; the third wireless communication module 441 and the fourth wireless communication module 442 of the host machine 400 respectively adopt the LoRa module and the 4G / 5G module.

[0035] When the phase-check distance is short, the host 400 and the slave 300 communicate through the Lora module. When the phase-check distance exceeds 1 km or even farther, data is transmitted through the 4G / 5G module to ensure that the phase-check work can proceed normally. Compared with the existing phase-check device products that only have a single communication path, the communication mode of the functional wireless phase-check device of this embodiment can ensure that the phase-check work is carried out more stably and quickly. Therefore, the multifunctional wireless phase-check device of this embodiment can be suitable for efficient and safe phase-checking in a variety of scenarios such as close distance, long distance, primary phase-checking and secondary phase-checking indoors and outdoors, realizing the phase-checking function of a phase-check device in a variety of scenarios, that is, multifunctionality.

[0036] In addition, the existing phase-checking devices are relatively large. Some wireless phase-checking devices need to collect information through two signal collectors and send it to the third end for processing and analysis. Other existing wireless phase-checking devices also require third-party equipment. In short, a detection device is set on the device to be tested and the reference device, and then a third-party device is used to compare and calculate the detection results obtained by the two detection devices to obtain the phase-checking results. Therefore, the existing phase-checking devices cannot be portable, which brings a burden to the on-site operators. The multifunctional wireless phase-checking device of this embodiment can realize the phase-checking with a host 400 and a slave 300, without the need for a third-party receiving device to receive and process data.

[0037] Example 2

[0038] Based on Example 1, this example provides a more preferred implementation, mainly adding the following solutions:

[0039] The existing secondary phase verification work is mainly completed with the help of multimeter measuring equipment, which not only requires the collaboration of multiple people, but also the multimeter is prone to misoperation or wrong gear selection, which may cause the substation equipment to trip, affecting the normal operation of safety equipment.

[0040] Please refer to Figure 4 In order to adapt to the operating habits of workers who use a multimeter to check the phase of low-voltage equipment, the multifunctional wireless phase checking device of this embodiment, the host 400 and the slave 300 are also equipped with a voltage measuring pen 530 (the measuring pen on the multimeter can be used), a DC voltage measuring module 510 and an AC voltage measuring module 520; the voltage measuring pen 530 detects the DC / AC voltage signal of the device circuit 200 / reference device circuit 100, and obtains the corresponding voltage data after processing by the DC voltage measuring module 510 / AC voltage measuring module 520.

[0041] Please refer to Figure 5 The multifunctional wireless phase-conversion device of this embodiment provides a preferred implementation scheme for the main internal components and measurement principle of the DC voltage measurement module 510 of the host 400 and the slave 300, as follows: The DC voltage measurement module 510 is mainly composed of a first voltage divider unit 511 and a first A / D conversion unit 512. The DC voltage obtained by the voltage measurement pen 530 is stepped down by the first voltage divider unit 511 and then input into the first A / D conversion unit 512 to be converted into a digital voltage signal to measure the voltage. The input voltage is reduced to a voltage range that can be input into the first A / D conversion unit 512 by the first voltage divider unit 511, and the first A / D conversion unit 512 is used for measurement.

[0042] Please refer to Figure 6The multifunctional wireless phase-conversion device of this embodiment provides two preferred implementations for the main internal components and measurement principles of the AC voltage measurement module 520 of the host 400 and the slave 300, as follows: The first average value type: the AC voltage measurement module 520 is mainly composed of a second voltage divider unit 521, a rectifier unit 523 and a second A / D conversion unit 522. The AC voltage obtained by the voltage measurement pen 530 is stepped down by the second voltage divider unit 521, and then rectified and smoothed by the rectifier unit 523 to be converted into a DC current, which is input into the second A / D conversion unit 522 to be converted into a digital voltage signal to measure the voltage. The second true RMS type: the AC voltage measurement module 520 is mainly composed of a second voltage divider unit 521, a DC conversion unit 524 and a second A / D conversion unit 522. The AC voltage obtained by the voltage measurement pen 530 is stepped down by the second voltage divider unit 521, and then converted into a DC current by the DC conversion unit 524, and then input into the second A / D conversion unit 522 to be converted into a digital voltage signal. In this embodiment, the DC conversion unit 524 adopts an RMS-DC conversion circuit. The result displayed by the average value type AC voltage measurement is the data of converting the average value of the sine wave AC into an effective value after multiplying the measurement result by 1.1. Therefore, AC signals other than sine waves cannot be displayed correctly. The true effective value type AC voltage measurement method does not use a rectifier circuit to convert the voltage signal, but an RMS-DC conversion circuit. Therefore, by using the second true effective value type AC voltage measurement module 520, AC models other than sine waves can also measure the correct effective value.

[0043] This embodiment adopts Lora+4G dual communication mode, and retains the function of using the voltage measuring pen 530 of the multimeter to check the phase. When the distance between the device to be tested and the reference device is within a few meters, the voltage measuring pen 530 mode can be used to perform the phase check operation, and the operator can communicate directly verbally; when the distance between the power grid to be tested and the reference power grid is within one kilometer, since verbal communication can no longer meet the phase check work, wireless communication is performed through Lora to complete the phase check work at a closer distance; when the distance between the power grid to be tested and the reference power grid is greater than one kilometer, 4G communication is used to perform the phase check work. According to different operating environments, the communication mode is used reasonably to ensure that the phase check work is carried out accurately and quickly. The multifunctional wireless phase check device of this embodiment retains the function of using the voltage measuring pen 530 of the multimeter to check the phase, and only retains the AC and DC voltage measurement function, avoiding the cumbersomeness of using the traditional multimeter to check the phase due to the wrong gear setting or the lead out of the station, and will not cause the equipment to trip due to misoperation or wrong gear selection. At the same time, through the wireless transmission communication between the host 400 and the slave 300, the rapid progress of the phase check work is ensured.

[0044] Example 3

[0045] Based on Example 2, this example provides a more preferred implementation, mainly adding the following solutions:

[0046] First, the present embodiment adds signal conditioning and provides a phase detection method, namely, zero-crossing detection. The slave 300 is provided with a first zero-crossing detection submodule and a first signal conditioning submodule in the first phase detection module 310. The host 400 is provided with a second zero-crossing detection submodule and a second signal conditioning submodule in the second phase detection module 410.

[0047] The slave 300 converts the acquired sine wave signal of the voltage of the reference device circuit 100 into a square wave signal through the first signal conditioning submodule, and then sends it to the first zero-crossing detection submodule for detection and recording the zero-crossing point of the voltage of the reference device circuit 100 and sends it to the host 400. The host 400 converts the acquired sine wave signal of the voltage of the device circuit 200 under test into a square wave signal through the second signal conditioning submodule, and then sends it to the second zero-crossing detection submodule for detection and recording the zero-crossing point of the voltage of the device circuit 200 under test; the second analysis and processing module 430 compares the zero-crossing point of the voltage of the reference device circuit 100 with the zero-crossing point of the voltage of the device circuit 200 under test, and obtains the phase difference between the voltage of the device circuit 200 under test and the voltage of the reference device circuit 100. Zero-crossing detection can be performed by detecting and recording the time difference between two adjacent positive zero-crossing points or the time difference between two adjacent negative zero-crossing points, and then comparing and calculating the two time differences to obtain the phase difference between the voltage of the device under test and the reference device.

[0048] In this embodiment, the first analysis and processing module 330 and the second analysis and processing module 430 use an MCU processor for data analysis, calculation and processing. The MCU processor is the core processor of the multifunctional wireless phase nuclear device, and basically all core algorithms are completed by it. Phase acquisition is performed by analyzing the signal after zero crossing detection, and the signal is sent to the host 400 through the wireless communication module for phase comparison, and the phase difference is obtained to obtain the phase nuclear result.

[0049] The multifunctional wireless phase detection device of this embodiment adopts a phase detection method that combines waveform transformation with zero-crossing point detection. The voltage signal is first converted into a square wave, and then the phase difference is calculated by detecting the zero-crossing moment. The amplitude influence can be ignored, and the limitations of the traditional phase detection method can be broken through. The phase detection function can be accurately realized in a variety of different voltage level environments. Whether it is a power system with a lower voltage level or a complex power grid with a high voltage level, this method has shown extremely high adaptability and reliability, providing a more efficient and accurate solution for high-voltage phase detection work, greatly improving the quality and efficiency of phase detection work, and ensuring the safe and stable operation of the power system under different voltage scenarios.

[0050] like Figure 7 and Figure 8As shown, on this basis, the host 400 and the slave 300 are also provided with an audio-visual reminder module and a human-computer interaction module. The first audio-visual reminder module 350 in the slave 300 is composed of a first LED lamp 351 and a first buzzer 352. At the same time, a first human-computer interaction module 370 is provided, which is composed of a first display screen 371 and a first button 372. The second audio-visual reminder module 450 in the host 400 is composed of a second LED lamp 451 and a second buzzer 452. At the same time, a second human-computer interaction module 470 is provided, which is composed of a second display screen 471 and a second button 472.

[0051] The sound and light reminder module is used to issue a sound and light reminder when the nuclear phase result is obtained, reminding the end of the nuclear phase. Of course, in a more preferred embodiment, the light reminder module can distinguish different sounds and lights to give different nuclear phase results, and issue reminders of different colors and sounds when the nuclear phase results are inconsistent or consistent. The human-computer interaction module is used to display relevant detection data, nuclear phase results, etc., and can input relevant nuclear phase requirements according to user needs.

[0052] The phase checking device of this embodiment performs phase checking work by means of LED lights and buzzer reminders. Its operation is simple and easy to understand, which effectively avoids the problem of prolonged working time due to complicated operations, and is very convenient for front-line power workers to quickly master and use it.

[0053] On the basis of the above scheme, the present embodiment further adds a scheme for synchronous sampling of the host 400 and the slave 300. The timing problem of the host 400 and the slave 300, and the synchronization of sampling have a very critical direct impact on the phase deviation. Therefore, the phase-correlation device has very high requirements in terms of data delay and sampling synchronization. The slave 300 and the host 400 want to achieve wireless transmission and data comparison. The prerequisite is that the relative time of the host 400 and the slave 300 is zero, the sampling frequency of the host 400 and the slave 300 is the same, and the sampling time corresponding to each sampling point must also be the same. Only in this way, the data sampled by the host 400 and the slave 300 are worth comparing.

[0054] Please refer to Figure 7 and Figure 8, the slave 300 is provided with a first timing module 381, which is used to record the sampling time and sampling frequency of the reference device line 100 sampled by the slave 300 and send them to the host 400. The host 400 is provided with a second timing module 481, which is used to record the sampling time and sampling frequency of the device line 200 sampled by the host 400; the timing synchronization module 482 is used to obtain the transmission delay and sampling time difference between the slave 300 and the host 400 according to the sampling time and sampling frequency of the host 400 and the slave 300, and adjust the sampling time of the host 400 according to the transmission delay and sampling time difference, and synchronize with the sampling time of the slave 300. In a preferred embodiment, the first timing module 381 and the second timing module 481 both use GPS / Beidou timing. The specific method of synchronous sampling of the host 400 and the slave 300 is as follows:

[0055] Please refer to Fig. 9 and Fig.10 , the slave 300 and the host 400 transmit data wirelessly. As long as the connection between the host 400 and the slave 300 is stable, the transmission delay T d is a fixed constant. Time synchronization is to accurately obtain T d And compensation is performed when the host 400 and the slave 300 sample data are compared. Fig. 9 Is to obtain T d method, Fig.10 The black dots in the figure represent the sampling time, the interval between two adjacent dots can represent the sampling frequency, and the interval between two adjacent black dots in the vertical direction represents the sampling time difference ΔT between the host 400 and the slave 300. s Although the sampling frequencies of the master 400 and the slave 300 are the same, it is impossible to synchronize the sampling times due to the different startup times of the two machines. The significance of sampling time synchronization is to synchronize Fig.10 ΔT in s Adjust to zero. The slave 300 end is the reference end, and the master 400 end is the adjustment end. During the synchronization process, the channel transmission delay T is first measured. d The host 400 uses the local relative clock as the reference at t ss The slave 300 sends a frame of message to the slave 300 at the same time, and the slave 300 records the reception time of the message according to the relative clock of the local machine t mr , then at the next sampling time t ms The time difference t ms -t mr The host 400 then records the time t when the slave 300 message is received. sr , the host 400 can obtain the wireless transmission delay T d . Measured T d After that, the host 400 can combine the time t sr Find ΔTs Then the host 400 makes multiple small step adjustments to the sampling time until the sampling time difference ΔT s To zero, both ends are sampled synchronously.

[0056] In the functional wireless phase checking device of this embodiment, the synchronous sampling of the host 400 and the slave 300 can ensure that the sampling time of the master and slave 300 devices is consistent, so as to further ensure the accuracy of the phase checking.

[0057] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A multifunctional wireless phase detection device, characterized in that: include: Master and slave; The host is electrically connected to the reference device circuit, and the slave is electrically connected to the device circuit under test; both the host and the slave are built with at least two wireless communication modules suitable for transmission at different distances, and the host and the slave transmit data through the wireless communication modules; The slaves include: A first phase detection module, at least used for sampling and detecting phase data of a reference device line; A first voltage detection module, at least used for sampling and detecting voltage data of a reference device circuit; A first analysis and processing module, at least used to analyze and process the phase data acquired by the first phase detection module and / or the voltage data acquired by the first voltage detection module, obtain phase information of the reference device line and send it to the host; The hosts include: A second phase detection module, at least used to detect phase data of a circuit of a device to be tested; A second voltage detection module, at least used to detect voltage data of a circuit of a device to be tested; The second analysis and processing module is at least used to analyze and process the phase data obtained by the second phase detection module and / or the voltage data obtained by the first voltage detection module, obtain the phase information of the line of the device to be tested, and calculate the phase difference in combination with the phase information of the reference device line sent from the slave to obtain the phase check result.

2. The multifunctional wireless phase detection device according to claim 1, characterized in that: The host and / or slave are also equipped with a voltage measuring pen, a DC voltage measuring module and an AC voltage measuring module; the voltage measuring pen detects the DC / AC voltage signal of the device circuit to be tested / reference device circuit, and obtains corresponding voltage data after processing by the DC voltage measuring module / AC voltage measuring module.

3. The multifunctional wireless phase detection device according to claim 2, characterized in that: The DC voltage measurement module includes a first voltage divider unit and a first A / D conversion unit. The DC voltage obtained by the voltage measuring pen is stepped down by the first voltage divider unit and then input into the first A / D conversion unit to be converted into a digital voltage signal; the AC voltage measurement module includes a second voltage divider unit, a rectification unit and a second A / D conversion unit. The AC voltage obtained by the voltage measuring pen is stepped down by the second voltage divider unit and then rectified and smoothed by the rectification unit and then input into the second A / D conversion unit to be converted into a digital voltage signal.

4. The multifunctional wireless phase detection device according to claim 2, characterized in that: The DC voltage measurement module includes a first voltage divider unit and a first A / D conversion unit. The DC voltage obtained by the voltage measuring pen is stepped down by the first voltage divider unit and then input into the first A / D conversion unit to be converted into a digital voltage signal; the AC voltage measurement module includes a second voltage divider unit, a DC conversion unit and a second A / D conversion unit. The AC voltage obtained by the voltage measuring pen is stepped down by the second voltage divider unit and then converted into DC by the DC conversion unit and then input into the second A / D conversion unit to be converted into a digital voltage signal.

5. The multifunctional wireless phase detection device according to claim 1, characterized in that: The wireless communication module includes a LoRa module and a 4G / 5G module.

6. The multifunctional wireless phase detection device according to claim 1, characterized in that: The slave also includes: a first timing module, which is used to record the sampling time and sampling frequency of the reference device line sampled by the slave and send them to the host; the host also includes: a second timing module, which is used to record the sampling time and sampling frequency of the device line sampled by the host; a time synchronization module, which is used to obtain the transmission delay and sampling time difference between the slave and the host according to the sampling time and sampling frequency of the host and the slave, and adjust the sampling time of the host according to the transmission delay and sampling time difference to synchronize with the sampling time of the slave.

7. The multifunctional wireless phase detection device according to claim 6, characterized in that: The first timing module and the second timing module adopt GPS / Beidou timing.

8. The multifunctional wireless phase detection device according to claim 1, characterized in that: The first phase detection module includes a first zero-crossing point detection submodule, which is used to detect and record the zero-crossing point of the line voltage of the reference device and send it to the host; the second phase detection module includes a second zero-crossing point detection submodule, which is used to detect and record the zero-crossing point of the line voltage of the device to be tested; The second analysis and processing module compares the zero-crossing point of the reference device line voltage with the zero-crossing point of the device-to-be-tested line voltage to obtain a phase difference between the device-to-be-tested line voltage and the reference device line voltage.

9. The multifunctional wireless phase detection device according to claim 8, characterized in that: The first phase detection module also includes a first signal conditioning submodule, which is used to convert the acquired sine wave signal of the reference device line voltage into a square wave signal, and then send it to the first zero-crossing point detection submodule; The second phase detection module also includes a second signal conditioning submodule, which is used to convert the acquired sine wave signal of the line voltage of the device under test into a square wave signal, and then send it to the second zero-crossing point detection submodule.

10. The multifunctional wireless phase detection device according to claim 1, characterized in that: The slave also includes: a first rechargeable battery, serving as a power source for the slave; and a first power conversion module, used for converting a voltage provided by the first rechargeable battery into an operating voltage required by each module in the slave; the host also includes: a second rechargeable battery, serving as a power source for the host; and a second power conversion module, used for converting a voltage provided by the second rechargeable battery into an operating voltage required by each module in the host.

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