CN114859144A - Three-phase high-low voltage phasing system - Google Patents
Three-phase high-low voltage phasing system Download PDFInfo
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- CN114859144A CN114859144A CN202210261666.7A CN202210261666A CN114859144A CN 114859144 A CN114859144 A CN 114859144A CN 202210261666 A CN202210261666 A CN 202210261666A CN 114859144 A CN114859144 A CN 114859144A
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- 238000012360 testing method Methods 0.000 claims abstract description 53
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 238000004891 communication Methods 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 239000013078 crystal Substances 0.000 claims description 10
- 230000010355 oscillation Effects 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 7
- 230000006641 stabilisation Effects 0.000 claims description 5
- 238000011105 stabilization Methods 0.000 claims description 5
- 230000003993 interaction Effects 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/18—Indicating phase sequence; Indicating synchronism
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
The invention discloses a three-phase high-low voltage phasing system, which comprises a phasing detection device, a mobile terminal in communication connection with the phasing detection device and a cloud server in communication with the mobile terminal; the cloud server is in communication connection with the phasing detection device through a pulse per second receiving antenna; the cloud server is used for providing square wave signals and frequency information of a three-phase source end standard phase; after receiving the square wave signal of the standard phase of the three-phase source end, the phasing detection device triggers a network end connection mechanism of the mobile terminal and the phasing detection device, the phase time is verified, and the mobile terminal displays the comparison condition of the test signal and the standard signal in real time and makes a judgment. The mobile terminal and the phasing detection device respectively acquire square wave signals and frequency information sent by the cloud server, calibration and synchronization of phasing time are performed through a trigger network connection mechanism, phasing operation is further performed through comparison of test information and standard information, and phasing efficiency of a phasing system can be remarkably improved.
Description
Technical Field
The invention relates to the technical field of high-low voltage nuclear phases, in particular to a three-phase high-low voltage phasing system.
Background
The phasing detection work of the existing power line network needs to be carried out by matching a directional handheld host with a transmitter, the directional handheld host needs to be maintained frequently (such as charging and the like), the flow consumption of the directional handheld host is large, the communication cost is not economical, and the communication resource is wasted; the directional handheld host has the defect that a card seat is easy to have poor contact to cause communication interruption in the actual use process; due to the delay of information transmission, the phase checking time is difficult to confirm, and the phase checking is inaccurate.
Disclosure of Invention
The invention aims to solve the problems of complex and uneconomical nuclear phase process and large nuclear phase error in the prior art, and designs a three-phase high-low voltage phasing system; the mobile terminal and the phasing detection device respectively acquire square wave signals and frequency information sent by the cloud server, calibration and synchronization of phasing time are carried out through a trigger network connection mechanism, phasing operation is further executed through comparison of test information and standard information, and therefore cost budget of a phasing system can be remarkably reduced, and phasing efficiency of the phasing system can be remarkably improved.
In order to achieve the technical purpose, the invention provides a three-phase high-low voltage phasing system, which comprises a phasing detection device, a mobile terminal and a cloud server, wherein the mobile terminal is in communication connection with the phasing detection device, and the cloud server is in communication with the mobile terminal; the cloud server is in communication connection with the phasing detection device through a pulse per second receiving antenna; the cloud server is used for providing square wave signals and frequency information of a three-phase source end standard phase; after the phasing detection device receives the square wave signals of the standard phase of the three-phase source end, a network end connection mechanism of the mobile terminal and the phasing detection device is triggered, phase time is verified, the mobile terminal displays the comparison condition of the test signals and the standard signals in real time, and judgment is made.
In the scheme, the cloud server is respectively in communication connection with the mobile terminal and the phasing detection device, the cloud server sends square wave signals and frequency information of a three-phase source end standard phase to the phasing detection device through the pulse per second receiving antenna, the phasing detection device is connected with the mobile terminal through Bluetooth, a communication gateway between the Bluetooth is opened and closed according to a network end connection mechanism, synchronization of phasing checking time is guaranteed, the mobile terminal performs phasing through comparison of collected test information and obtained standard information, and cost and phasing efficiency of a phasing system can be remarkably improved.
Preferably, the mobile terminal comprises a display unit, a storage unit, a phase determination unit, a positioning module, a time approval unit and a communication module;
the communication module is in communication connection with the phasing detector;
the storage unit is used for temporarily storing the square wave signals and the frequency information of the three-phase source end standard phase provided by the cloud server;
the time approval unit is used for calibrating the phase checking time of the test signal and the square wave signal according to the frequency information of the square wave signal;
the display unit is used for comparing and displaying the test signal and the square wave signal;
the positioning module is used for positioning the geographical position information of the nodes of the equipment to be tested;
and the phase judgment unit is used for outputting a comparison and discrimination result according to the comparison condition of the test signal and the square wave signal.
According to the scheme, the square wave signals and the frequency information of the three-phase source end standard phases acquired from the cloud server are stored in the storage unit, when the communication gateway is opened for information transmission through the network end connection mechanism, the mobile terminal acquires test information, the test information comprises a time tag, the time tag is analyzed and subjected to square wave calibration through the time calibration unit, the square wave signals and the frequency information of the three-phase source end standard phases in the storage unit are respectively called to be displayed and compared, and the phase judgment unit is used for outputting comparison phase results according to comparison conditions of the test signals and the square wave signals.
Preferably, the phasing detection device comprises a phasing detector and an operating rod connected with the phasing detector, and the phasing detector comprises a test connecting end, a base and a test emitter arranged between the test connecting end and the base; the base is connected with the operating rod.
Preferably, the test transmitter comprises a main control module, a charge-discharge control module, a power supply module, a bluetooth module, a high temperature stabilization compensation type crystal oscillation module, a standard pulse receiving module and a power frequency signal conversion module, wherein the charge-discharge control module, the power supply module, the bluetooth module, the high temperature stabilization compensation type crystal oscillation module, the standard pulse receiving module and the power frequency signal conversion module are respectively and electrically connected with the main control module; the power supply module is electrically connected with the charge and discharge control module; the power frequency signal conversion module is electrically connected with the test connecting end; the standard pulse receiving module is used for receiving square wave signals and frequency information of a three-phase source end standard phase sent by a pulse-per-second receiving antenna, the power frequency signal conversion module is used for testing power frequency signals of a lead, and the Bluetooth module is in information interaction with the communication module; the high temperature stabilization compensation type crystal oscillation module is used for maintaining the stability of a standard clock signal and guaranteeing the time accuracy of the test emitter for phasing the test lead.
Preferably, the test connection end comprises a fixed seat and a metal hook fixedly mounted on the fixed seat, and the metal hook is electrically connected with the power frequency signal conversion module.
Preferably, the operating rod is of a multi-section telescopic structure, an insulating rubber sleeve is arranged at a holding end of the operating rod, threads are arranged at a connecting end of the operating rod, and the operating rod is in threaded connection with the base.
Preferably, the main control module is an STM32FXX type single chip microcomputer.
The invention has the beneficial effects that: the invention designs a three-phase high-low voltage phasing system; the mobile terminal and the phasing detection device respectively acquire square wave signals and frequency information sent by the cloud server, calibration and synchronization of phasing time are carried out through a trigger network connection mechanism, phasing operation is further executed through comparison of test information and standard information, and therefore cost budget of a phasing system can be remarkably reduced, and phasing efficiency of the phasing system can be remarkably improved.
Drawings
Fig. 1 is a schematic structural diagram of a three-phase high-low voltage phasing system of the invention.
Fig. 2 is a structural diagram of a phasing detection device of the invention.
Fig. 3 is a block diagram of the test transmitter of the present invention.
The notation in the figure is: the notation in the figure is: a-a phasing detection device, 1-a test emitter, 2-a base, 31-a fixed base, 32-a metal hook, 4-an operating rod, 41-a rubber sleeve, 11-a main control module, 12-a charging and discharging control module, 13-a power supply module, 14-a Bluetooth module, 15-a high-temperature-stability compensation type crystal oscillation module, 16-a standard pulse receiving module and 17-a power frequency signal conversion module; 81-mobile terminal, 82-cloud server and 83-second pulse receiving antenna.
Detailed Description
For the purpose of better understanding the objects, technical solutions and advantages of the present invention, the following detailed description of the present invention with reference to the accompanying drawings and examples should be understood that the specific embodiment described herein is only a preferred embodiment of the present invention, and is only used for explaining the present invention, and not for limiting the scope of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without making creative efforts shall fall within the scope of the present invention.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the disclosure.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.
The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
It is to be understood by those skilled in the art that the drawings are merely schematic representations of exemplary embodiments, and that the blocks or processes shown in the drawings are not necessarily required to practice the present disclosure and are, therefore, not intended to limit the scope of the present disclosure.
Example (b): as shown in fig. 1, a schematic structural diagram of a three-phase high-low voltage phasing system includes a phasing detection device a, a mobile terminal 81 in communication connection with the phasing detection device, and a cloud server 82 in communication with the mobile terminal; the cloud server is in communication connection with the phasing detection device through a pulse-per-second receiving antenna 83; the cloud server is used for providing square wave signals and frequency information of a three-phase source end standard phase; after the phasing detection device receives the square wave signals of the standard phase of the three-phase source end, a network end connection mechanism of the mobile terminal and the phasing detection device is triggered, phase time is verified, the mobile terminal displays the comparison condition of the test signals and the standard signals in real time, and judgment is made.
In the embodiment, the cloud server is respectively in communication connection with the mobile terminal and the phasing detection device, the cloud server sends square wave signals and frequency information of a three-phase source end standard phase to the phasing detection device through the pulse per second receiving antenna, the phasing detection device is connected with the mobile terminal through Bluetooth, a communication gateway between the Bluetooth is opened and closed according to a network end connection mechanism, synchronization of phasing checking time is guaranteed, the mobile terminal performs phasing through comparison of collected test information and obtained standard information, and cost and phasing efficiency of a phasing system can be remarkably improved.
The mobile terminal comprises a display unit (not shown), a storage unit (not shown), a phase determination unit (not shown), a positioning module (not shown), a time approval unit (not shown) and a communication module (not shown), wherein the communication module is in communication connection with the phasing detector, and the storage unit is used for temporarily storing square wave signals and frequency information of a three-phase source standard phase provided by the cloud server; the time approval unit is used for calibrating the phase checking time of the test signal and the square wave signal according to the frequency information of the square wave signal; the display unit is used for comparing and displaying the test signal and the square wave signal; the positioning module is used for positioning the geographical position information of the nodes of the equipment to be tested; and the phase judgment unit is used for outputting a comparison and discrimination result according to the comparison condition of the test signal and the square wave signal.
In this embodiment, the square wave signal and the frequency information of the three-phase source standard phase obtained from the cloud server are stored in the storage unit, when the network connection mechanism opens the communication gateway for information transmission, the mobile terminal obtains test information, where the test information includes a time tag, the time tag is analyzed and subjected to square wave calibration by the time calibration unit, the square wave signal and the frequency information of the three-phase source standard phase in the storage unit are respectively retrieved for display and comparison, and the phase determination unit is configured to output a comparison phase result according to a comparison condition between the test signal and the square wave signal.
As shown in fig. 2, the phasing detection device comprises a phasing detector and an operating rod 4 connected with the phasing detector, the phasing detector comprises a test connection end (not shown), a base 2 and a test emitter 1 arranged between the test connection end and the base; the base is connected with the operating rod; the test connecting end comprises a fixed seat 31 and a metal hook 32 fixedly arranged on the fixed seat, and the metal hook is electrically connected with the power frequency signal conversion module; the operating rod is of a multi-section telescopic structure, an insulating rubber sleeve 41 is arranged at the holding end of the operating rod, threads are arranged at the connecting end of the operating rod, and the operating rod is in threaded connection with the base.
As shown in fig. 3, the test transmitter includes a main control module 11, a charge-discharge control module 12, a power module 13, a bluetooth module 14, a high-temperature-stability-compensated crystal oscillation module 15, a standard pulse receiving module 16, and a power frequency signal conversion module 17, where the charge-discharge control module, the power module, the bluetooth module, the high-temperature-stability-compensated crystal oscillation module, the standard pulse receiving module, and the power frequency signal conversion module are respectively electrically connected to the main control module; the main control module is an STM32FXX type single chip microcomputer; the power supply module is electrically connected with the charge and discharge control module; the power frequency signal conversion module is electrically connected with the test connecting end; the standard pulse receiving module is used for receiving square wave signals and frequency information of a three-phase source end standard phase sent by a pulse-per-second receiving antenna, the power frequency signal conversion module is used for testing power frequency signals of a lead, and the Bluetooth module is in information interaction with the communication module; the high temperature stabilization compensation type crystal oscillation module is used for maintaining the stability of a standard clock signal and guaranteeing the time accuracy of the test emitter for phasing the test lead.
The above-mentioned embodiments are preferred embodiments of a three-phase high-low voltage phasing system according to the invention, and the scope of the invention is not limited thereto, and the invention includes and is not limited to the embodiments, and all equivalent changes in shape and structure according to the invention are within the protection scope of the invention.
Claims (7)
1. A three-phase high-low voltage phasing system is characterized by comprising a phasing detection device, a mobile terminal in communication connection with the phasing detection device and a cloud server in communication with the mobile terminal; the cloud server is in communication connection with the phasing detection device through a pulse per second receiving antenna; the cloud server is used for providing square wave signals and frequency information of a three-phase source end standard phase; after the phasing detection device receives the square wave signals of the standard phase of the three-phase source end, a network end connection mechanism of the mobile terminal and the phasing detection device is triggered, phase time is verified, the mobile terminal displays the comparison condition of the test signals and the standard signals in real time, and judgment is made.
2. The three-phase high-low voltage phasing system of claim 1, wherein the mobile terminal comprises a display unit, a storage unit, a phase determination unit, a positioning module, a time approval unit and a communication module;
the communication module is in communication connection with the phasing detection device;
the storage unit is used for temporarily storing the square wave signals and the frequency information of the three-phase source end standard phase provided by the cloud server;
the time approval unit is used for calibrating the phase checking time of the test signal and the square wave signal according to the frequency information of the square wave signal;
the display unit is used for comparing and displaying the test signal and the square wave signal;
the positioning module is used for positioning the geographical position information of the nodes of the equipment to be tested;
and the phase judgment unit is used for outputting a comparison and discrimination result according to the comparison condition of the test signal and the square wave signal.
3. The three-phase high and low voltage phasing system according to claim 1 or 2, wherein the phasing detection device comprises a phasing detector and an operating rod connected with the phasing detector, the phasing detector comprises a test connection end, a base and a test emitter arranged between the test connection end and the base; the base is connected with the operating rod.
4. The three-phase high-low voltage phasing system according to claim 3, wherein the test transmitter comprises a main control module, a charge-discharge control module, a power supply module, a Bluetooth module, a high temperature-stabilizing compensation type crystal oscillation module, a standard pulse receiving module and a power frequency signal conversion module, and the charge-discharge control module, the power supply module, the Bluetooth module, the high temperature-stabilizing compensation type crystal oscillation module, the standard pulse receiving module and the power frequency signal conversion module are respectively and electrically connected with the main control module; the power supply module is electrically connected with the charge and discharge control module; the power frequency signal conversion module is electrically connected with the test connecting end; the standard pulse receiving module is used for receiving square wave signals and frequency information of a three-phase source end standard phase sent by a pulse-per-second receiving antenna, the power frequency signal conversion module is used for testing power frequency signals of a lead, and the Bluetooth module is in information interaction with the communication module; the high temperature stabilization compensation type crystal oscillation module is used for maintaining the stability of a standard clock signal and guaranteeing the time accuracy of the test emitter for phasing the test lead.
5. The three-phase high-low voltage phasing system as recited in claim 4, wherein the testing connection end comprises a fixed seat and a metal hook fixedly mounted on the fixed seat, and the metal hook is electrically connected with the power frequency signal conversion module.
6. The three-phase high and low voltage phasing system as recited in claim 3, wherein the operating rod is a multi-section telescopic structure, the holding end of the operating rod is provided with an insulating rubber sleeve, the connecting end of the operating rod is provided with a thread, and the operating rod is in threaded connection with the base.
7. The three-phase high-low voltage phasing system of claim 4, wherein the main control module is an STM32FXX type single chip microcomputer.
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| CN202210261666.7A CN114859144A (en) | 2022-03-16 | 2022-03-16 | Three-phase high-low voltage phasing system |
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| CN202210261666.7A CN114859144A (en) | 2022-03-16 | 2022-03-16 | Three-phase high-low voltage phasing system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102006352A (en) * | 2009-08-31 | 2011-04-06 | 比亚迪股份有限公司 | Alarm controller, alarm method and alarm system for mobile terminal |
| CN203968154U (en) * | 2014-06-25 | 2014-11-26 | 国网福建南安市供电有限公司 | A kind of long-range kernel phase system based on wireless Internet |
| CN209446678U (en) * | 2019-01-04 | 2019-09-27 | 深圳摩通电气有限公司 | A kind of novel radio phase checking device |
| CN111175586A (en) * | 2020-02-24 | 2020-05-19 | 南京蓝慧电力科技有限公司 | Power distribution network phase checking system and method |
| US20210263166A1 (en) * | 2020-02-21 | 2021-08-26 | Qualcomm Incorporated | Method and apparatus to determine relative location using gnss carrier phase |
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2022
- 2022-03-16 CN CN202210261666.7A patent/CN114859144A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102006352A (en) * | 2009-08-31 | 2011-04-06 | 比亚迪股份有限公司 | Alarm controller, alarm method and alarm system for mobile terminal |
| CN203968154U (en) * | 2014-06-25 | 2014-11-26 | 国网福建南安市供电有限公司 | A kind of long-range kernel phase system based on wireless Internet |
| CN209446678U (en) * | 2019-01-04 | 2019-09-27 | 深圳摩通电气有限公司 | A kind of novel radio phase checking device |
| US20210263166A1 (en) * | 2020-02-21 | 2021-08-26 | Qualcomm Incorporated | Method and apparatus to determine relative location using gnss carrier phase |
| CN111175586A (en) * | 2020-02-24 | 2020-05-19 | 南京蓝慧电力科技有限公司 | Power distribution network phase checking system and method |
Non-Patent Citations (1)
| Title |
|---|
| 陈超 等: "超宽带生命探测雷达研制及应用", 《电子测量技术》, vol. 37, no. 3, 15 March 2014 (2014-03-15), pages 15 - 19 * |
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