CN113804951B - Live display device of circuit and live identification method of circuit - Google Patents
Live display device of circuit and live identification method of circuit Download PDFInfo
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- CN113804951B CN113804951B CN202111066894.0A CN202111066894A CN113804951B CN 113804951 B CN113804951 B CN 113804951B CN 202111066894 A CN202111066894 A CN 202111066894A CN 113804951 B CN113804951 B CN 113804951B
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- XBVSGJGMWSKAKL-UHFFFAOYSA-N 1,3,5-trichloro-2-(3,5-dichlorophenyl)benzene Chemical compound ClC1=CC(Cl)=CC(C=2C(=CC(Cl)=CC=2Cl)Cl)=C1 XBVSGJGMWSKAKL-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G01R19/155—Indicating the presence of voltage
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Abstract
The application discloses a live display device of a circuit and a live identification method of the circuit. The device comprises: the device comprises a voltage acquisition module, a data processing module and a buzzer alarm module; the voltage acquisition module is connected with the data processing module and is used for respectively acquiring phase voltage acquisition results of three phases of the line and sending the phase voltage acquisition results to the data processing module; the data processing module is connected with the buzzer alarm module and is used for acquiring the state of a switch arranged on the circuit and determining whether the circuit is in an abnormal electrified state or not according to the received phase voltage acquisition result and the state of the switch; and if the alarm is in an abnormal electrification state, alarming through the buzzer alarm module. By adopting the technical scheme of the embodiment of the application, safer and more efficient protection is provided for the power failure operation of field staff.
Description
Technical Field
The application relates to the technical field of Internet, in particular to a live display device of a circuit and a live identification method of the circuit.
Background
The 10kV switch power failure is an operation task which is operated by operators in the current stage for a plurality of times and is nearest to the electrified equipment. Because most switch cabinets are armored and fully closed, direct electricity inspection cannot be performed, operators must change the live display device from live to non-live through inspection before the switch is turned off, and therefore the line is judged to be non-voltage. However, the quality of the existing live display device is generally poor, and in addition, the live display device is in an off state when an operator arrives at the site due to the conditions of line tripping, scheduling and switching off, and indirect electricity inspection cannot be performed through the change of the live display device. Therefore, developing a safe and efficient charged display device is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention provides a live display device of a circuit and a live identification method of the circuit, which are used for synchronously collecting the position of a switch and the live condition of equipment, automatically detecting whether the state of the equipment is consistent or not, and warning field operators when abnormal conditions are found, so as to effectively prevent misoperation events such as a loaded disconnecting link, a live grounding disconnecting link and the like.
In a first aspect, an embodiment of the present invention provides a live display device for a line, including: the device comprises a voltage acquisition module, a data processing module and a buzzer alarm module;
The voltage acquisition module is connected with the data processing module and is used for respectively acquiring phase voltage acquisition results of three phases of the line and sending the phase voltage acquisition results to the data processing module;
The data processing module is connected with the buzzer alarm module and is used for acquiring the state of a switch arranged on the circuit and determining whether the circuit is in an abnormal electrified state or not according to the received phase voltage acquisition result and the state of the switch; and if the alarm is in an abnormal electrification state, alarming through the buzzer alarm module.
Further, the live display device of the circuit further includes:
The clock module is connected with the data processing module and used for providing clock information for the data processing module;
The data processing module is further used for determining the three-phase charging state of the circuit according to the phase voltage acquisition result, and carrying out charging state change record based on the clock information when the three-phase charging state of the circuit changes.
Further, the live display device of the circuit further includes:
and the screen display module is connected with the data processing module and used for displaying the three-phase electrification state and displaying the time when the three-phase electrification state changes.
Further, the data processing module is specifically configured to:
If the received phase voltage acquisition result determines that the three-phase electrification state is at least one phase electrification state and the state of the switch is an off state, determining that the circuit is in an abnormal electrification state, and alarming through the buzzer alarm module.
Further, the data processing module comprises a PCB and a singlechip;
the PCB is provided with a signal preprocessing circuit and an isolation amplifying circuit;
The signal preprocessing circuit is used for converting the phase voltages of the three phases to obtain a three-phase voltage acquisition result;
The isolation amplifying circuit is used for amplifying the three-phase voltage acquisition result and transmitting the three-phase voltage acquisition result to the singlechip;
The singlechip is used for identifying the phase voltage acquisition result of the three phases and determining whether the electrified state changes or not.
Further, the acquisition frequency of the phase voltage acquisition result of the three phases is 20 times per second.
Further, the model of the singlechip is C8051F340.
Further, the voltage acquisition module comprises three capacitive sensors;
the capacitive sensors are respectively arranged on three phases of the circuit, and are connected with the data processing module through shielded cables.
In a second aspect, an embodiment of the present invention further provides a method for identifying a line in a live line, where the method includes:
Respectively acquiring three-phase voltage acquisition results of a line;
Acquiring the state of a switch arranged on a circuit, and determining whether the circuit is in an abnormal electrified state or not according to the received phase voltage acquisition result and the state of the switch; if the electric power is in an abnormal electrification state, the alarm is given through the buzzer.
Further, the method further comprises:
and determining the three-phase charging state of the circuit according to the phase voltage acquisition result, and carrying out charging state change record based on clock information when the three-phase charging state of the circuit changes.
The embodiment of the invention discloses a live display device of a circuit and a live identification method of the circuit. The device comprises: the device comprises a voltage acquisition module, a data processing module and a buzzer alarm module; the voltage acquisition module is connected with the data processing module and is used for respectively acquiring phase voltage acquisition results of three phases of the line and sending the phase voltage acquisition results to the data processing module; the data processing module is connected with the buzzer alarm module and is used for acquiring the state of a switch arranged on the circuit and determining whether the circuit is in an abnormal electrified state or not according to the received phase voltage acquisition result and the state of the switch; and if the alarm is in an abnormal electrification state, alarming through the buzzer alarm module. By adopting the technical scheme of the embodiment of the invention, the switch position and the electrification condition of the equipment are synchronously collected, whether the state of the equipment is consistent or not is automatically detected, and when abnormal conditions are found, on-site operators are warned, so that misoperation events such as on-load disconnecting links, electrified earthing switches and the like are effectively prevented.
Drawings
Fig. 1 is a schematic structural diagram of a circuit live display device according to a first embodiment of the present invention;
FIG. 2 is an exploded view of the functional result of a live display device of a circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a circuit live display device according to a second embodiment of the present invention;
FIG. 4 is a schematic diagram of an input signal preprocessing circuit according to an embodiment of the present invention;
FIG. 5 is an isolated amplifying circuit diagram provided by an embodiment of the present invention;
FIG. 6 is a diagram of a model of a charged display device according to an embodiment of the present invention;
Fig. 7 is a flowchart of a method for identifying a line in a live line according to a third embodiment of the present invention.
Detailed Description
The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings.
Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart depicts steps as a sequential process, many of the steps may be implemented in parallel, concurrently, or with other steps. Furthermore, the order of the steps may be rearranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figures. The processes may correspond to methods, functions, procedures, subroutines, and the like.
Example 1
Fig. 1 is a schematic structural diagram of a circuit live display device according to an embodiment of the invention. The technical scheme of the embodiment of the invention can be applied to the scene of live display of the circuit.
As shown in fig. 1, a live display device of a circuit provided in an embodiment of the present invention includes: the voltage acquisition module 110, the data processing module 120 and the buzzer alarm module 130;
the voltage acquisition module 110 is connected with the data processing module 120, and is configured to acquire phase voltage acquisition results of three phases of a line respectively, and send the phase voltage acquisition results to the data processing module;
The data processing module 120 is connected with the buzzer alarm module 130, and is used for collecting the state of a switch arranged on the circuit, and determining whether the circuit is in an abnormal electrified state or not according to the received phase voltage collection result and the state of the switch; and if the alarm is in an abnormal electrification state, alarming through the buzzer alarm module.
When the line trips or the dispatcher turns off the switch, the live display device is in a turned-off state, and an operator cannot indirectly check electricity through the change of the live display device. For example, when a knife switch is pulled under load, the load current is cut off instantly, the electric arc is pulled, the current value is also larger and far exceeds the load current of the knife switch, high temperature is generated, the conditions of hurting people by electric arc, burning out equipment and inter-phase flashover short circuit are caused, and serious accidents are caused; in addition, if the electrified display device has no power failure, the grounding switch is closed, and a three-phase short circuit is formed between circuits, so that serious consequences such as arc light injury and equipment damage can be caused to personnel.
In this embodiment, the voltage acquisition module 110 acquires the phase voltage acquisition results of the three phases of the line respectively. Wherein, the three phases of the line can be the A phase, the B phase and the C phase of the fire wire in the line; the phase voltage may refer to a voltage between any one of the a phase, B phase and C phase of the hot wire and the neutral wire, for example, may be a voltage between the a phase line and the neutral wire, and the phase voltage may be 10kV.
The voltage acquisition module 110 transmits the acquired phase voltage acquisition result to the data processing module through the shielded cable. The shielded cable can be a cable with external electromagnetic interference resistance formed in a mode of externally adding a shielding layer to the transmission cable, and can effectively shield the influence caused by high-voltage environment.
The data processing module 120 may refer to a multifunctional embedded communication controller, which can connect different devices together, for example, the data processing module 120 receives a phase voltage acquisition result sent by the voltage acquisition module 110, determines whether a line is in an abnormal state according to the phase voltage acquisition result and a switch state, and alarms the abnormal electrified state through the buzzer alarm module 130.
The switch state may refer to whether the line is in an on state or an off state.
The abnormal state may be a working state of the object under an abnormal condition, for example, may be that the phase voltage acquisition result is normal but the switch is in an off state, and then the line is judged to be in an abnormal state.
The buzzer alarm module 130 may be a module that sends out an alarm prompt when it is determined that the line is abnormal, and the buzzer includes, but is not limited to, HYE-1605P-type active buzzers. Optionally, the voltage acquisition module 110 uses the principle of capacitive voltage division, and uses three capacitive sensors to correspond to the a phase, the B phase and the C phase of the line respectively, so as to obtain three-phase voltages of the line independently and in real time by induction, and then the three-phase voltages are transmitted to the data processing module through the shielded cable, so that the influence of the high-voltage electromagnetic environment on the sensor and the voltage data is reduced. The capacitive sensors are respectively arranged on three phases of the circuit, and are connected with the data processing module through shielded cables.
And the data processing module 120 determines that the circuit is in an abnormal electrification state if the electrification state of the three phases is at least one phase electrification and the state of the switch is an off state according to the received phase voltage acquisition result, and alarms through the buzzer alarm module.
The voltage acquisition module is used for acquiring the phase voltages of three phases of the line in real time, so that whether the electrified display device is electrified or not can be detected in real time, and the occurrence of events such as electrified earthing knife-switches and the like is avoided; the phase voltage acquisition result is transmitted to the data processing module through the shielding cable, so that the influence of the high-voltage magnetic environment on the sensor and the voltage data can be reduced by using the shielding cable, and the influence caused by the high-voltage environment can be effectively shielded; the buzzer alarm module alarms, so that workers can be timely reminded, and accidents are avoided.
In this technical scheme, optionally, the electrified display device of circuit still includes:
A clock module 140, connected to the data processing module 120, for providing clock information for the data processing module;
the data processing module is further used for determining the three-phase charging state of the circuit according to the phase voltage acquisition result, and carrying out charging state change record based on the clock information when the three-phase charging state of the circuit changes;
the screen display module 150 is connected to the data processing module 120, and is configured to display the three-phase electrification state, and display the time when the three-phase electrification state changes.
The clock module 140 may refer to a module capable of providing year, month, day, minute, second, etc. information. For example, clock module 140 may be a high precision I2C real time clock device employing DS 3231. The module comprises a battery input end, can still keep accurate timing when the main power supply is disconnected, and can store information such as seconds, minutes, hours, weeks, dates, months, years and the like. The clock module DS3231 and the singlechip transmit address and data through the I2C bidirectional serial bus.
The I2C bi-directional serial bus may refer to the transmission of data between devices using only two lines, and is a bi-directional two-wire synchronous serial bus. SDA (serial data) in the I2C bus can refer to a circuit for transmitting and receiving data by a clock module and a singlechip; SCL (serial clock) may refer to a line carrying a clock signal.
The screen display module 150 may be a module for displaying three-phase electrification conditions, for example, an HJ1602A industrial character type liquid crystal display module may be adopted, and 16 x 2, that is, 32 characters (16 columns and 2 rows) may be displayed at the same time, and an instruction is input to the HJ1602A display module through the singlechip, so that three-phase electrification conditions and the time of line on-off can be displayed on the screen display module.
The clock module is used for providing clock information for the data processing module; the screen display module displays the three-phase charging state and displays the time when the three-phase charging state changes, so that an operator can conveniently check whether the charging display device is charged or not, whether the three-phase charging state changes and the time when the three-phase charging state changes.
As shown in fig. 2, which is an exploded view of the functional result of the live display device of the line, the data processing module 120 and the clock module 140 implement a real-time monitoring function of the line; the buzzer alarm module 130 realizes an alarm function; the screen display module 150 and the touch keys of the live display device of the line realize a man-machine interaction function.
In the embodiment of the present invention, the voltage acquisition module 110 is connected with the data processing module 120, and the acquired phase voltage acquisition result is sent to the data processing module; the data processing module 120 is connected with the buzzer alarm module 130 and is used for carrying out alarm processing when the circuit is abnormal; the clock module 140 is connected to the data processing module 120 and is configured to provide clock information for the data processing module; the screen display module 150 is connected to the data processing module 120, and is configured to display the three-phase electrification state, and display the time when the three-phase electrification state changes. By adopting the technical scheme of the embodiment of the invention, the switch position and the electrification condition of the equipment are synchronously collected, whether the state of the equipment is consistent or not is automatically detected, and when the abnormal condition is identified, the on-site operator is warned, so that the occurrence of misoperation events such as load-bearing disconnecting link, electrification-connection grounding disconnecting link and the like is effectively prevented, and safer and more efficient protection is provided for the line control operation of on-site operators.
Example two
Fig. 3 is a schematic structural diagram of a live display device with a circuit according to a second embodiment of the present invention, which is further refined on the basis of the foregoing embodiment, and the present invention may be combined with various alternatives in the foregoing embodiment. Optionally, in the embodiment of the present invention, the data processing module 120 includes a PCB 121 and a single chip microcomputer 122;
The PCB circuit board 121 is provided with a signal preprocessing circuit 1211 and an isolation amplifying circuit 1212;
the signal preprocessing circuit 1211 is configured to convert the phase voltages of the three phases to obtain a three-phase voltage acquisition result;
The isolation amplifying circuit 1212 is configured to amplify the three-phase voltage acquisition result and transmit the amplified result to the singlechip;
The singlechip 122 is configured to identify the three-phase voltage acquisition result, and determine whether a change occurs in the charging state.
The signal preprocessing circuit 1211 may be a circuit that converts a signal, for example, may convert a charge-voltage, convert a current-voltage, convert a frequency-voltage, convert an impedance, and the like, so as to obtain a phase voltage acquisition result. The acquisition frequency of the phase voltage acquisition result of the three phases may be 20 times/second.
The isolation amplifier 1212 is a special measurement amplifier that amplifies the signal converted by the signal preprocessing circuit and transmits the signal with high impedance and high common mode rejection in a noisy environment.
The single chip microcomputer 122 is an integrated circuit chip, and a small and perfect microcomputer system is formed by integrating a chip with data processing capability onto a silicon chip. For example, the device can be a singlechip with the model of C8051F340, and has the characteristics of high reliability, strong processing function, high speed, convenient use and the like.
The phase voltage signal acquisition device comprises a signal preprocessing circuit, an isolation amplifying circuit, a singlechip and a power supply, wherein the signal preprocessing circuit and the isolation amplifying circuit are arranged, so that the acquired phase voltage signal can be converted, the converted electric signal is amplified and then transmitted to the singlechip, and the phase voltage acquisition result is identified, thereby realizing the automatic detection of the electrified display device.
Optionally, the signal preprocessing circuit 1211 functions to perform protection and current-voltage conversion, as shown in fig. 4, to absorb external surge current and electromagnetic interference through the gas discharge tube G3 and the TVS tube D3; the common-mode inductor U3 filters a common-mode interference signal; to prevent the input voltage from exceeding the input range of the subsequent circuit, clipping is performed through diodes D6 and D9; and then the current signal is converted into a voltage signal through a resistor R5 and sent to a later-stage isolation amplifying circuit.
The isolation amplifying circuit 1212 adopts an integrated Mornsun series isolation amplifying module, as shown in fig. 5, and adopts an integrated Mornsun series to isolate the strong-current side signal from the weak-current side signal, and sends the signals to the singlechip C8051F340 for logic judgment.
The singlechip C8051F340 adopts 1S to execute 20 times of cycle monitoring, and the realization logic is as follows as shown in fig. 6: firstly, a circulation program judges whether self-checking is carried out, a self-checking button control circuit on the shell of the electrified display device changes a pin of the singlechip C8051F340 from low potential to high potential, and then the singlechip C8051F340 sends a self-checking voltage signal to a signal preprocessing circuit, when the self-checking of the device is normal, A phase, B phase and C phase indicator lamps are on, the self-checking lamps are on, and a buzzer sounds to give an alarm; the singlechip compares line three-phase voltages Ua0, ub0 and Uc0 obtained in the previous time with line three-phase voltages Ua1, ub1 and Uc1 obtained in the current time, when Ua1, ub1 and Uc1 are larger than set values, the corresponding indicator lamps are lighted, for example, the set value is 1, and when Ua1 is larger than 1, the corresponding A-phase indicator lamps are lighted; when Ua1, ub1 and Uc1 are smaller than the set values, the corresponding indicator lamps are not lighted, for example, the set value is 0, and when Ua1 is smaller than 0, the corresponding A-phase indicator lamps are not lighted; if Ua0 is larger than Ua1 or Ub0 is larger than Ub1 or Uc0 is larger than Uc1, the singlechip controls the clock module to record corresponding power-off time of A phase, B phase and C phase, and if Ua0 is smaller than Ua1 or Ub0 is smaller than Ub1 or Uc0 is smaller than Uc1, corresponding power-off time of A phase, B phase and C phase is recorded; the auxiliary contact of the line switch is accessed through the singlechip, so that the function of recording the switching-off time when the switch is switched off can be realized; when the switch is judged to be at the opening position, ua0 is smaller than Ua1 or Ub0 is smaller than Ub1 or Uc0 is smaller than Uc1, the reverse charging of the opposite sides of the line is indicated, and a beeping alarm is immediately sent to remind field staff.
In the embodiment of the invention, a signal preprocessing circuit converts the phase voltages of three phases to obtain a three-phase voltage acquisition result; the isolation amplifying circuit amplifies the phase voltage acquisition result of the three phases and transmits the phase voltage acquisition result to the singlechip; and the singlechip identifies the phase voltage acquisition result of the three phases and determines whether the electrified state changes or not. By adopting the technical scheme of the embodiment of the invention, the functions are more comprehensive, the records of the line power-on time, the power-off time and the switch opening time are realized, the alarm of beeping is immediately given out when the abnormal situation is found, the on-site staff is reminded, and the safer and more efficient protection is provided for the power-off operation of the on-site staff.
Example III
Fig. 7 is a flowchart of a method for live identification of a line according to a third embodiment of the present invention, where the technical solution of the present invention is applicable to the case of live identification, and particularly to the case of live identification of a line, and the method may be performed by the live display device of a line according to any embodiment of the present invention. As shown in fig. 7, the method for identifying the electrification of the line provided in the embodiment of the present invention specifically includes the following steps:
S710, respectively acquiring phase voltage acquisition results of three phases of the line.
On the basis of the above embodiment, optionally, the method further includes: three capacitive sensors are respectively adopted to acquire three-phase voltage acquisition results of the circuit;
the capacitive sensors are respectively arranged on three phases of the circuit, and are connected with the data processing module through shielded cables.
S720, acquiring the state of a switch arranged on the line, and determining whether the line is in an abnormal electrified state or not according to the received phase voltage acquisition result and the state of the switch; if the electric power is in an abnormal electrification state, the alarm is given through the buzzer.
On the basis of the above embodiment, optionally, the method further includes: if the received phase voltage acquisition result determines that the three-phase electrification state is at least one phase electrification state and the state of the switch is an off state, determining that the circuit is in an abnormal electrification state, and alarming through the buzzer alarm module.
On the basis of the above embodiment, optionally, the data processing module includes a PCB and a single chip microcomputer;
the PCB is provided with a signal preprocessing circuit and an isolation amplifying circuit;
The signal preprocessing circuit is used for converting the phase voltages of the three phases to obtain a three-phase voltage acquisition result;
The isolation amplifying circuit is used for amplifying the three-phase voltage acquisition result and transmitting the three-phase voltage acquisition result to the singlechip;
The singlechip is used for identifying the phase voltage acquisition result of the three phases and determining whether the electrified state changes or not.
On the basis of the embodiment, optionally, the acquisition frequency of the phase voltage acquisition result of the three phases is 20 times/second.
Based on the above embodiment, optionally, the single chip microcomputer model is C8051F340.
And S730, determining the three-phase charging state of the circuit according to the phase voltage acquisition result, and carrying out charging state change record based on clock information when the three-phase charging state of the circuit changes.
S740, based on displaying the three-phase charging state, displaying the time when the three-phase charging state changes.
The method for identifying the line in the embodiment of the present application can be applied to the line live display device provided in any embodiment of the present application, and has the corresponding functions and beneficial effects of the line live display device, and technical details not described in detail in the embodiment of the present application may be specifically referred to the line live display device provided in any embodiment of the present application.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (9)
1. A live display device of a line, wherein a switch and a live display device are provided on the line, the live display device comprising: the device comprises a voltage acquisition module, a data processing module and a buzzer alarm module;
The voltage acquisition module is connected with the data processing module and is used for respectively acquiring phase voltage acquisition results of three phases of the line and sending the phase voltage acquisition results to the data processing module;
The data processing module is connected with the buzzer alarm module and is used for acquiring the state of a switch arranged on the circuit and determining whether the circuit is in an abnormal electrified state or not according to the received phase voltage acquisition result and the state of the switch; if the alarm is in an abnormal electrification state, alarming is carried out through the buzzer alarm module;
The data processing module comprises a PCB and a singlechip;
the PCB is provided with a signal preprocessing circuit and an isolation amplifying circuit;
the signal preprocessing circuit is used for converting the three-phase voltage acquisition result to obtain a three-phase voltage conversion result;
the isolation amplifying circuit is used for amplifying the phase voltage conversion result of the three phases and transmitting the result to the singlechip;
The singlechip is used for identifying the phase voltage conversion result of the three phases and determining whether the electrified state changes or not;
The signal preprocessing circuit absorbs external surge current and electromagnetic interference through the gas discharge tube G3 and the TVS tube D3; filtering the common-mode interference signal through a common-mode inductor U3; clipping is performed through a diode D6 and a diode D9; then the current signal is converted into a voltage signal through a resistor R5 and is sent to a post-stage isolation amplifying circuit;
The isolation amplifying circuit adopts an integrated Mornsun series isolation amplifying module; the integrated Mornsun series isolation amplifying module is used for isolating the strong-current side signal from the weak-current side signal and sending the signals to the singlechip for logic judgment;
The implementation logic of the singlechip is as follows: firstly, a circulation program judges whether self-checking is carried out, a self-checking signal changes a pin of a singlechip from low potential to high potential by a self-checking button control circuit on a shell of an electrified display device, and then the singlechip sends a self-checking voltage signal to a signal preprocessing circuit, when the self-checking of the device is normal, A phase, B phase and C phase indicator lamps are on, the self-checking lamps are on, and a buzzer sends out beeping alarm; the singlechip compares the line three-phase voltages Ua0, ub0 and Uc0 obtained in the previous time with the line three-phase voltages Ua1, ub1 and Uc1 obtained in the current time, and when the line three-phase voltages Ua1, ub1 and Uc1 are larger than set values, the corresponding indicator lamp is lighted; when Ua1, ub1 and Uc1 are smaller than the set values, the corresponding indicator lamps are not lighted; if Ua0 is larger than Ua1 or Ub0 is larger than Ub1 or Uc0 is larger than Uc1, the singlechip records corresponding power-off time of A phase, B phase and C phase, and if Ua0 is smaller than Ua1 or Ub0 is smaller than Ub1 or Uc0 is smaller than Uc1, the singlechip records corresponding power-off time of A phase, B phase and C phase; the auxiliary contact of the line switch is accessed through the singlechip, so that the function of recording the switching-off time when the switch is switched off is realized; when the switch is judged to be at the opening position, ua0 is smaller than Ua1 or Ub0 is smaller than Ub1 or Uc0 is smaller than Uc1, the reverse charging of the opposite sides of the line is indicated, and a beeping alarm is immediately sent to remind field staff.
2. The apparatus of claim 1, wherein the live display device of the line further comprises:
The clock module is connected with the data processing module and used for providing clock information for the data processing module;
The data processing module is further used for determining the three-phase charging state of the circuit according to the phase voltage acquisition result, and carrying out charging state change record based on the clock information when the three-phase charging state of the circuit changes.
3. The apparatus of claim 2, wherein the live display device of the line further comprises:
and the screen display module is connected with the data processing module and used for displaying the three-phase electrification state and displaying the time when the three-phase electrification state changes.
4. The apparatus according to claim 1, wherein the data processing module is specifically configured to:
If the received phase voltage acquisition result determines that the three-phase electrification state is at least one phase electrification state and the state of the switch is an off state, determining that the circuit is in an abnormal electrification state, and alarming through the buzzer alarm module.
5. The apparatus of claim 1, wherein the acquisition frequency of the phase voltage acquisition of the three phases is 20 times/second.
6. The apparatus of claim 1, wherein the single chip microcomputer model number is C8051F340.
7. The apparatus of claim 1, wherein the voltage acquisition module comprises three capacitive sensors;
the capacitive sensors are respectively arranged on three phases of the circuit, and are connected with the data processing module through shielded cables.
8. A method for live identification of a line, characterized in that the method is performed by a live display device of a line according to any one of claims 1-7, the live display device and a switch being arranged on the line; the method comprises the following steps:
Respectively acquiring three-phase voltage acquisition results of a line;
Acquiring the state of a switch arranged on a circuit, and determining whether the circuit is in an abnormal electrified state or not according to the received phase voltage acquisition result and the state of the switch; if the electric power is in an abnormal electrification state, the alarm is given through the buzzer.
9. The method of claim 8, wherein the method further comprises:
and determining the three-phase charging state of the circuit according to the phase voltage acquisition result, and carrying out charging state change record based on clock information when the three-phase charging state of the circuit changes.
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