CN113804951A - 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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- CN113804951A CN113804951A CN202111066894.0A CN202111066894A CN113804951A CN 113804951 A CN113804951 A CN 113804951A CN 202111066894 A CN202111066894 A CN 202111066894A CN 113804951 A CN113804951 A CN 113804951A
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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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- 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
- G01R19/145—Indicating the presence of current or voltage
- G01R19/155—Indicating the presence of voltage
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Abstract
The application discloses an electrified display device of a circuit and an electrified 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 used for acquiring the state of a switch arranged on the line and determining whether the line is in an abnormal charged state or not according to the received phase voltage acquisition result and the state of the switch; and if the power supply is in an abnormal electrified state, alarming is carried out through the buzzer alarming module. By adopting the technical scheme of the embodiment of the invention, safer and more efficient protection is provided for the power failure operation of field workers.
Description
Technical Field
The present application relates to the field of internet technologies, and in particular, to an electrified display device for a line and an electrified identification method for a line.
Background
The 10kV switch power failure is an operation task which is close to live equipment and has more operation times of operators at the present stage. Because most cubical switchboard are the armor totally enclosed, can't carry out direct test electricity, so before carrying out the disconnected switch, operating personnel must change from electrified to electroless through the inspection electrified display device to judge that the circuit is non-voltage. However, the quality of the existing live display device is generally poor, and in addition, under the conditions of line tripping or dispatching a disconnecting switch and the like, when an operator arrives at the site, the live display device is in an off state, and indirect electricity testing cannot be carried out through the change of the live display device. Therefore, it is an urgent technical problem to be solved by those skilled in the art to develop a safe and efficient charged display device.
Disclosure of Invention
The invention provides a live display device of a line and a live identification method of the line, which are used for synchronously collecting the switch position and the live condition of equipment, automatically detecting whether the state of the equipment is consistent or not, warning field operators when the abnormal condition is found, and effectively preventing misoperation events such as pulling a disconnecting link with a load, closing a grounding disconnecting link with the load and the like.
In a first aspect, an embodiment of the present invention provides an electrified display device for a circuit, where the device includes: 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 used for acquiring the state of a switch arranged on the line and determining whether the line is in an abnormal charged state or not according to the received phase voltage acquisition result and the state of the switch; and if the power supply is in an abnormal electrified state, alarming is carried out through the buzzer alarming module.
Further, the live display device of the circuit 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 configured to determine an electrified state of the three phases of the line according to the phase voltage acquisition result, and perform an electrified state change record based on the clock information when the electrified state of the three phases of the line changes.
Further, the live display device of the circuit further comprises:
and the screen display module is connected with the data processing module and used for displaying the three-phase electrified state and displaying the time when the three-phase electrified state changes.
Further, the data processing module is specifically configured to:
and if the electrified state of the three phases is determined to be at least one phase electrified state and the state of the switch is an off state according to the received phase voltage acquisition result, determining that the line is in an abnormal electrified state, and alarming through the buzzer alarm module.
Further, the data processing module comprises a PCB circuit board 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 voltage of the three phases to obtain a phase voltage acquisition result of the three phases;
the isolation amplifying circuit is used for amplifying the phase voltage acquisition result of the three phases and transmitting the phase voltage acquisition result to the single chip microcomputer;
and the single chip microcomputer is used for identifying the phase voltage acquisition results of the three phases and determining whether the charged state changes.
Further, the frequency of acquiring the phase voltage acquisition results of the three phases is 20 times per second.
Further, the single chip microcomputer is C8051F340 in model.
Further, the voltage acquisition module comprises three capacitive sensors;
the capacitive sensors are respectively arranged on three phases of the line 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 an electrified manner, where the method includes:
respectively acquiring phase voltage acquisition results of three phases of the line;
acquiring the state of a switch arranged on a line, and determining whether the line is in an abnormal electrified state or not according to a received phase voltage acquisition result and the state of the switch; and if the battery is in an abnormal electrified state, alarming by a buzzer.
Further, the method further comprises:
and determining the electrified state of the three phases of the line according to the phase voltage acquisition result, and carrying out electrified state change recording based on clock information when the electrified state of the three phases of the line changes.
The embodiment of the invention discloses an electrified display device of a circuit and an electrified identification method of the circuit. The device includes: 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 used for acquiring the state of a switch arranged on the line and determining whether the line is in an abnormal charged state or not according to the received phase voltage acquisition result and the state of the switch; and if the power supply is in an abnormal electrified state, alarming is carried out through the buzzer alarming module. By adopting the technical scheme of the embodiment of the invention, the switch position and the electrified condition of the equipment are synchronously collected, whether the state of the equipment is consistent or not is automatically detected, and the on-site operator is warned when the abnormal condition is found, so that the misoperation events such as on-load disconnecting link, electrified grounding disconnecting link and the like are effectively prevented.
Drawings
Fig. 1 is a schematic structural diagram of an electrified display device with circuits according to an embodiment of the present invention;
FIG. 2 is an exploded view of the functional result of a circuit live display device provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electrified display device with circuits according to a second embodiment of the present invention;
FIG. 4 is a circuit diagram of an input signal preprocessing circuit according to an embodiment of the present invention;
FIG. 5 is a diagram of an isolation amplifier circuit according to an embodiment of the present invention;
FIG. 6 is a diagram of a charged display device according to an embodiment of the present invention;
fig. 7 is a flowchart of a method for identifying live lines according to a third embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures.
Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the steps as a sequential process, many of the steps can be performed in parallel, concurrently or simultaneously. In addition, 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 figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
Example one
Fig. 1 is a schematic structural diagram of an electrified display device with a circuit according to an embodiment of the present invention. The technical scheme of the embodiment of the invention can be suitable for the live display scene of the line.
As shown in fig. 1, the live display device of the line provided in the embodiment of the present invention includes: a voltage acquisition module 110, a data processing module 120 and a buzzer alarm module 130;
the voltage acquisition module 110 is connected to the data processing module 120, and is configured to acquire phase voltage acquisition results of three phases of a line, and send the phase voltage acquisition results to the data processing module;
the data processing module 120 is connected to the buzzer alarm module 130, and is configured to collect a state of a switch disposed on the line, and determine whether the line is in an abnormal charged state according to a received phase voltage collection result and the state of the switch; and if the power supply is in an abnormal electrified state, alarming is carried out through the buzzer alarming module.
When the circuit trips or the dispatcher disconnects the switch, the electrified display device is in an off state, and the operator cannot check electricity indirectly through the change of the electrified display device. For example, when a disconnecting link is pulled under load, at the moment of cutting off load current, electricity can be subjected to arc discharge, the current value can also become larger and far exceeds the load current of the disconnecting link, and high temperature can be generated at the same time, so that the situations that people are injured by electric arcs, equipment is burned out, and interphase arcing short circuit can be caused, and serious accidents can be caused in serious cases; in addition, if the live display device is not powered off, the grounding knife switch is closed, a three-phase short circuit is formed between circuits, and serious consequences such as personnel damage caused by electric arc light and equipment damage can be caused.
In this embodiment, the voltage acquisition module 110 respectively acquires phase voltage acquisition results of three phases of the line. Wherein, the three phases of the line can refer to phase A, phase B and phase C of the live line in the line; the phase voltage may refer to a voltage between any one of the phase lines a, B and C of the live line and the neutral line, and may be, for example, a voltage between the phase line a and the neutral line, and the phase voltage may be 10 kV.
The voltage acquisition module 110 transmits the acquired phase voltage acquisition result to the data processing module through a shielded cable. The shielding cable can be a cable with external electromagnetic interference resistance formed in a mode of adding a shielding layer outside a transmission cable, and can effectively shield the influence brought by a high-voltage environment.
The data processing module 120 may be 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 an abnormal charged state through the buzzer alarm module 130.
The switching state may refer to whether the line is in an on state or an off state.
The abnormal state may be a working state in which the object is in an abnormal condition, for example, if the phase voltage acquisition result is normal but the switch is in an off state, it may be determined that the line is in an abnormal state.
The buzzer alarm module 130 may refer to a module that gives an alarm when it is determined that the line is abnormal, and the buzzer includes, but is not limited to, an HYE-1605P-type active buzzer. Optionally, the voltage acquisition module 110 is configured to separately obtain three-phase voltages of the line by using a capacitance voltage division principle and using an a phase, a B phase and a C phase of the line corresponding to the three capacitive sensors, and transmit the three-phase voltages to the data processing module through a shielded cable, so as to reduce the influence of the high-voltage electromagnetic environment on the sensors and the voltage data. The capacitive sensors are respectively arranged on three phases of the line and are connected with the data processing module through shielded cables.
And the data processing module 120 determines that the line is in an abnormal electrified state and gives an alarm through the buzzer alarm module if the electrified state of the three phases is determined to be at least one phase electrified state and the state of the switch is an off state according to the received phase voltage acquisition result.
The voltage acquisition module acquires the phase voltages of three phases of the line in real time, and can detect whether the electrified display device is electrified or not in real time, so that the occurrence of the events of electrified earthing knife-switch closing and the like is avoided; the phase voltage acquisition result is transmitted to the data processing module through the shielded cable, and the influence of a high-voltage electromagnetic environment on the sensor and the voltage data can be reduced by using the shielded cable, so that the influence caused by the high-voltage environment is effectively shielded; through buzzer alarm module reports to the police, can in time remind the staff, avoids meeting accident.
In this technical solution, optionally, the live display device of the line further includes:
a clock module 140 connected to the data processing module 120, for providing clock information to the data processing module;
the data processing module is further used for determining the electrified state of the three phases of the line according to the phase voltage acquisition result, and carrying out electrified state change recording based on the clock information when the electrified state of the three phases of the line changes;
and the screen display module 150 is connected to the data processing module 120, and is configured to display the three-phase charging state and display the time when the three-phase charging state changes.
The clock module 140 may refer to a module capable of providing time information such as year, month, day, minute, and second, among others. For example, the clock module 140 may be an I2C real-time clock device with high precision using DS 3231. The module comprises a battery input end, can keep accurate timing when a 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 single chip microcomputer transmit addresses and data through an I2C bidirectional serial bus.
The I2C bidirectional serial bus may refer to a bidirectional two-wire synchronous serial bus that uses only two wires for data transfer between devices. SDA (serial data) in the I2C bus can refer to a circuit for sending 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 a three-phase electrification condition, for example, an HJ1602A industrial character type liquid crystal display module may be adopted, and 16 × 2 characters (16 columns and 2 rows) may be simultaneously displayed, and the single chip inputs an instruction to the HJ1602A display module, so that the three-phase electrification condition and the time of the power on/off of the power line may 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 electrified state of the three phases and displays the time when the electrified state of the three phases changes, so that an operator can conveniently check whether the electrified display device is electrified or not, whether the three-phase electrified state changes or not and the time when the three-phase electrified 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 for 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 circuit realize the human-computer interaction function.
In the embodiment of the present invention, the voltage acquisition module 110 is connected to the data processing module 120, and sends the acquired phase voltage acquisition result to the data processing module; the data processing module 120 is connected to the buzzer alarm module 130, and is configured to perform alarm processing when a line 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 charging status and display the time when the three-phase charging status changes. By adopting the technical scheme of the embodiment of the invention, the switch position and the electrified condition of the equipment are synchronously collected, whether the state of the equipment is consistent or not is automatically detected, and the on-site operator is warned when the abnormal condition is identified, so that the misoperation events such as an on-load disconnecting link, an electrified grounding disconnecting link and the like are effectively prevented, and the safer and more efficient protection is provided for the line control operation of the on-site operator.
Example two
Fig. 3 is a schematic structural diagram of an electrified display device of a circuit provided in a second embodiment of the present invention, and this embodiment is detailed on the basis of the above embodiment, and this embodiment can be combined with various alternatives in the above embodiment. Optionally, in the embodiment of the present invention, the data processing module 120 includes a PCB circuit board 121 and a single chip 122;
the PCB 121 is provided with a signal preprocessing circuit 1211 and an isolation amplifying circuit 1212;
the signal preprocessing circuit 1211 is configured to convert phase voltages of three phases to obtain phase voltage acquisition results of the three phases;
the isolation amplifying circuit 1212 is configured to amplify the phase voltage acquisition result of the three phases and transmit the amplified phase voltage acquisition result to the single chip microcomputer;
the single chip microcomputer 122 is configured to identify a phase voltage acquisition result of the three phases, and determine whether a change occurs in an electrified state.
The signal preprocessing circuit 1211 may refer to a circuit for converting a signal, and may be, for example, a circuit for converting charge-voltage, a circuit for converting current-voltage, a circuit for converting frequency-voltage, and a circuit for converting impedance, so as to obtain a phase voltage acquisition result. The acquisition frequency of the phase voltage acquisition results 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 capability in a noisy environment.
The single chip 122 is an integrated circuit chip, and integrates a chip with data processing capability into a silicon chip to form a small and perfect microcomputer system. For example, the single chip microcomputer can be a C8051F340 single chip microcomputer, and has the characteristics of high reliability, strong processing function, high speed, convenience in use and the like.
The phase voltage signal acquisition circuit comprises a signal preprocessing circuit, a phase voltage signal acquisition circuit, a single chip microcomputer and a voltage detection circuit, wherein the signal preprocessing circuit and the isolation amplifying circuit are arranged, the phase voltage signal acquisition circuit can convert the acquired phase voltage signal, the converted electric signal is amplified and then transmitted to the single chip microcomputer, the phase voltage acquisition result is identified, and automatic detection of the charged display device is achieved.
Optionally, the signal preprocessing circuit 1211 is configured to perform protection and current-voltage conversion, as shown in fig. 4, and absorbs external surge current and electromagnetic interference through the gas discharge tube G3 and the TVS tube D3; filtering a common-mode interference signal by a common-mode inductor U3; in order to prevent the input voltage from exceeding the input range of the subsequent circuit, the amplitude limiting is carried out through diodes D6 and D9; the current signal is converted into a voltage signal through a resistor R5 and then sent to a rear-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 complete the isolation of the strong current side signal and the weak current side signal, and sends the signals to the single chip microcomputer C8051F340 for logic judgment.
The single chip microcomputer C8051F340 performs 20 times of cyclic monitoring by using 1S, and the implementation logic shown in fig. 6 is as follows: firstly, a circulation program judges whether to carry out self-checking, a self-checking button control circuit on a shell of the electrified display device controls a pin of a singlechip C8051F340 to be changed from a low potential to a high potential according to a self-checking signal, then the singlechip C8051F340 sends a self-checking voltage signal to a signal preprocessing circuit, an A-phase indicator lamp, a B-phase indicator lamp and a C-phase indicator lamp are turned on when the device is in self-checking normal, the self-checking lamp is turned on, and a buzzer alarms; comparing the line three-phase voltages Ua0, Ub0 and Uc0 obtained at the previous time with the line three-phase voltages Ua1, Ub1 and Uc1 obtained at this time, when Ua1, Ub1 and Uc1 are larger than set values, the corresponding indicator lamp is turned on, for example, the set value is 1, and when Ua1 is larger than 1, the corresponding A-phase indicator lamp is turned on; when the Ua1, the Ub1 and the Uc1 are smaller than the set value, the corresponding indicator light is not on, for example, the set value is 0, and when the Ua1 is smaller than 0, the corresponding a-phase indicator light is not on; if Ua0 is larger than Ua1 or Ub0 is larger than Ub1 or Uc0 is larger than Uc1, the singlechip-controlled clock module records the power-off time of the corresponding 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 power-on time of the corresponding 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 brake-off time when the switch is switched off can be realized; when the judgment switch is in the opening position and Ua0 is smaller than Ua1 or Ub0 is smaller than Ub1 or Uc0 is smaller than Uc1, the opposite side of the line is charged reversely, and a buzzing alarm is immediately sent out to remind field workers.
In the embodiment of the invention, the signal preprocessing circuit converts the phase voltage of three phases to obtain a phase voltage acquisition result of the three phases; the isolation amplifying circuit amplifies the phase voltage acquisition result of the three phases and transmits the amplified phase voltage acquisition result to the single chip microcomputer; and the single chip microcomputer identifies the phase voltage acquisition result of the three phases and determines whether the charged state changes. By adopting the technical scheme of the embodiment of the invention, the functions are more comprehensive, the record of the line electrification time, the power-off time and the switch opening time is recorded, and the buzzer alarm is immediately sent out to remind field workers when abnormal conditions are found, thereby providing safer and more efficient protection for the power failure operation of the field workers.
EXAMPLE III
Fig. 7 is a flowchart of a method for identifying a line with electricity according to a third embodiment of the present invention, where the technical solution according to the third embodiment of the present invention is applicable to a situation of identifying a line with electricity, and is particularly applicable to a situation of identifying a line with electricity. As shown in fig. 7, the method for identifying live lines provided in the embodiment of the present invention specifically includes the following steps:
and 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: respectively adopting three capacitive sensors to acquire phase voltage acquisition results of three phases of the line;
the capacitive sensors are respectively arranged on three phases of the line 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 charged state or not according to the received phase voltage acquisition result and the state of the switch; and if the battery is in an abnormal electrified state, alarming by a buzzer.
On the basis of the above embodiment, optionally, the method further includes: and if the electrified state of the three phases is determined to be at least one phase electrified state and the state of the switch is an off state according to the received phase voltage acquisition result, determining that the line is in an abnormal electrified 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;
the PCB is provided with a signal preprocessing circuit and an isolation amplifying circuit;
the signal preprocessing circuit is used for converting the phase voltage of the three phases to obtain a phase voltage acquisition result of the three phases;
the isolation amplifying circuit is used for amplifying the phase voltage acquisition result of the three phases and transmitting the phase voltage acquisition result to the single chip microcomputer;
and the single chip microcomputer is used for identifying the phase voltage acquisition results of the three phases and determining whether the charged state changes.
On the basis of the above embodiment, optionally, the acquisition frequency of the phase voltage acquisition results of the three phases is 20 times/second.
On the basis of the above embodiment, optionally, the model of the single chip microcomputer is C8051F 340.
And S730, determining the electrified state of the three phases of the line according to the phase voltage acquisition result, and carrying out electrified state change recording based on clock information when the electrified state of the three phases of the line changes.
And S740, displaying the three-phase charged state and displaying the time when the three-phase charged state changes.
The method for identifying the live line of the line provided in the embodiment of the present invention may be applied to the live display device of the line provided in any embodiment of the present invention, and the live display device of the line provided in any embodiment of the present invention has corresponding functions and advantageous effects.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. 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, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An electrified display device of circuit, characterized in that, be provided with switch and electrified display device on the circuit, electrified display device includes: 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 used for acquiring the state of a switch arranged on the line and determining whether the line is in an abnormal charged state or not according to the received phase voltage acquisition result and the state of the switch; and if the power supply is in an abnormal electrified state, alarming is carried out through the buzzer alarming module.
2. The apparatus of claim 1, wherein the live display 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 configured to determine an electrified state of the three phases of the line according to the phase voltage acquisition result, and perform an electrified state change record based on the clock information when the electrified state of the three phases of the line changes.
3. The apparatus of claim 2, wherein the live display of the line further comprises:
and the screen display module is connected with the data processing module and used for displaying the three-phase electrified state and displaying the time when the three-phase electrified state changes.
4. The apparatus according to claim 1, wherein the data processing module is specifically configured to:
and if the electrified state of the three phases is determined to be at least one phase electrified state and the state of the switch is an off state according to the received phase voltage acquisition result, determining that the line is in an abnormal electrified state, and alarming through the buzzer alarm module.
5. The device of claim 1, wherein the data processing module comprises a PCB circuit board 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 voltage of the three phases to obtain a phase voltage acquisition result of the three phases;
the isolation amplifying circuit is used for amplifying the phase voltage acquisition result of the three phases and transmitting the phase voltage acquisition result to the single chip microcomputer;
and the single chip microcomputer is used for identifying the phase voltage acquisition results of the three phases and determining whether the charged state changes.
6. The device of claim 5, wherein the acquisition frequency of the phase voltage acquisition results of the three phases is 20 times/second.
7. The device of claim 5, wherein the single chip microcomputer is of a type C8051F 340.
8. 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 line and are connected with the data processing module through shielded cables.
9. The method is characterized in that the method is executed by an electrified display device of the line, and the electrified display device and a switch are arranged on the line; the method comprises the following steps:
respectively acquiring phase voltage acquisition results of three phases of the line;
acquiring the state of a switch arranged on a line, and determining whether the line is in an abnormal electrified state or not according to a received phase voltage acquisition result and the state of the switch; and if the battery is in an abnormal electrified state, alarming by a buzzer.
10. The method of claim 9, further comprising:
and determining the electrified state of the three phases of the line according to the phase voltage acquisition result, and carrying out electrified state change recording based on clock information when the electrified state of the three phases of the line changes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111066894.0A CN113804951B (en) | 2021-09-13 | 2021-09-13 | Live display device of circuit and live identification method of circuit |
Applications Claiming Priority (1)
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