CN116500487B - Fault detection system and method for switching power supply, terminal equipment and medium - Google Patents
Fault detection system and method for switching power supply, terminal equipment and medium Download PDFInfo
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- CN116500487B CN116500487B CN202310750313.8A CN202310750313A CN116500487B CN 116500487 B CN116500487 B CN 116500487B CN 202310750313 A CN202310750313 A CN 202310750313A CN 116500487 B CN116500487 B CN 116500487B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The application relates to the technical field of switching power supplies, and discloses a fault detection system and method of a switching power supply, terminal equipment and a medium. The system comprises: the device comprises a switching power supply, a fault analysis module and an output detection module; the output detection module is used for reading the output information of the switching power supply and transmitting the output information to the fault analysis module; the fault analysis module comprises an electric signal detection unit and a data analysis unit, wherein the electric signal detection unit is used for determining whether the output information accords with preset standard output information, and if not, the electric signal detection unit is used for collecting the current value and the voltage value of each monitoring node in the switching power supply; the analysis module is used for comparing the voltage value of each monitoring node with each standard voltage value data range, comparing the current value of each monitoring node with each standard current value data range, and determining the fault reason of the switching power supply according to the comparison result. The application can improve the fault detection efficiency of the switching power supply.
Description
Technical Field
The present application relates to the field of switching power supply technologies, and in particular, to a fault detection system and method for a switching power supply, a terminal device, and a medium.
Background
With the continuous progress of technology and the continuous expansion of application fields, a switching power supply has become an indispensable important component in modern electronic equipment.
In the use process of the conventional switch power supply, the switch power supply is influenced by factors such as external environment corrosion, self electrical insulation performance and stability, and the like, so that faults can occur, and as a result, the internal electronic devices of the switch power supply are more, the circuit function is more complex, once the faults occur, the switch power supply is generally required to be comprehensively checked, the period for removing the faults is longer, inconvenience is brought to the use and maintenance of the switch power supply, and the running state of a matched electrical system is even influenced.
In summary, how to improve the fault detection efficiency of the switching power supply is clearly a problem to be solved in the art.
Disclosure of Invention
The application mainly aims to provide a fault detection system, a fault detection method, terminal equipment and a medium of a switching power supply, and aims to improve the fault detection efficiency of the switching power supply.
To achieve the above object, the present application provides a fault detection system of a switching power supply, the fault detection system of the switching power supply including: the device comprises a switching power supply, a fault analysis module and an output detection module, wherein the switching power supply is electrically connected with the output detection module, the output detection module is electrically connected with the fault analysis module, and the switching power supply is electrically connected with the fault analysis module;
the output detection module is used for reading the output information of the switching power supply and transmitting the output information to the fault analysis module;
the fault analysis module comprises an electric signal detection unit and a data analysis unit;
the electric signal detection unit is used for determining whether the output information accords with preset standard output information, and if not, collecting current values and voltage values of all monitoring nodes in the switching power supply;
the data analysis unit is configured to compare a voltage value of each monitoring node with each standard voltage value data range, compare a current value of each monitoring node with each standard current value data range, and determine a fault cause of the switching power supply according to a comparison result, where each standard voltage value data range is a voltage value of each monitoring node measured when the switching power supply is connected to a load in an initial state, and each standard current value data range is a current value of each monitoring node measured when the switching power supply is connected to the load in the initial state.
Optionally, the output detection module includes circuit breaker, voltmeter, relay, mutual-inductor and ampere meter, the input of circuit breaker with switching power supply's output is connected, the output of circuit breaker respectively with the input of relay the input of voltmeter is connected, the output of relay with the input of mutual-inductor is connected, the output of mutual-inductor respectively with the input of fault analysis module the ampere meter is connected.
Optionally, the switching power supply includes: the device comprises a rectification filter circuit, a control circuit, a main switch conversion isolation circuit and a rectification output circuit;
the output end of the rectifying and filtering circuit is provided with a first monitoring node;
the oscillation output pin of the oscillation chip of the control circuit is provided with a second monitoring node, the reference voltage output pin of the oscillation chip is provided with a third monitoring node, and the current feedback pin of the oscillation chip is provided with a fourth monitoring node;
the output end of the main switch conversion isolation circuit is provided with a fifth monitoring node;
the front-stage filter capacitor of the rectification output circuit is connected in series with a sixth monitoring node, the rear-stage filter capacitor of the rectification output circuit is connected in series with a seventh monitoring node, and the feedback circuit of the rectification output circuit is provided with an eighth monitoring node;
each monitoring node is electrically connected with the fault analysis module.
Optionally, the system further comprises a fault prompting module, wherein the fault prompting module is electrically connected with the fault analysis module;
the fault prompting module comprises: the data display unit is used for displaying the current value and the voltage value of each monitoring node acquired by the electric signal detection unit; the fault display unit is used for displaying the fault reason of the switching power supply determined by the fault analysis module; and the fault alarm unit is used for sending out at least one of sound and light alarm prompts when the switching power supply is determined to be faulty.
Optionally, the fault analysis module is further configured to determine that the rectifying and filtering circuit has a fault if it is detected that the first voltage value of the first monitoring node is smaller than the first standard voltage value data range and the first current value of the first monitoring node is greater than the first standard current value data range; and if the first voltage value accords with the first standard voltage value data range and the first current value accords with the first standard current value data range, determining that the oscillation chip of the control circuit fails when no voltage value is displayed on the second monitoring node, the third monitoring node and the fourth monitoring node.
Optionally, the fault analysis module is further configured to determine that the main switch transformation isolation circuit fails if it is detected that the fifth voltage value of the fifth monitoring node does not conform to the fifth standard voltage value data range and the fifth current value of the fifth monitoring node does not conform to the fifth standard current value data range.
Optionally, the fault analysis module is further configured to determine that a preceding filter capacitor of the rectifying output circuit fails if it is detected that the sixth voltage value of the sixth monitoring node does not conform to the sixth standard voltage value data range and the sixth current value of the sixth monitoring node does not conform to the sixth standard current value data range;
if the seventh voltage value of the seventh monitoring node is detected to be not in accordance with the seventh standard voltage value data range and the seventh current value of the seventh monitoring node is detected to be not in accordance with the seventh standard current value data range, determining that a later stage filter capacitor of the rectification output circuit fails;
and if the eighth voltage value of the eighth monitoring node is detected to be not in accordance with the eighth standard voltage value data range and the eighth current value of the eighth monitoring node is detected to be not in accordance with the eighth standard current value data range, determining that a feedback circuit of the rectifying output circuit fails.
In addition, in order to achieve the above object, the present application also provides a fault detection method of a switching power supply, the fault detection method of the switching power supply being applied to a switching power supply including a plurality of monitoring nodes, the fault detection method of the switching power supply including:
determining whether the output information of the switching power supply accords with preset standard output information, and if not, acquiring current values and voltage values of all monitoring nodes in the switching power supply;
comparing the voltage value of each monitoring node with each standard voltage value data range, comparing the current value of each monitoring node with each standard current value data range, and determining the fault cause of the switching power supply according to the comparison result, wherein each standard voltage value data range is the voltage value of each monitoring node measured when the switching power supply is connected with a load in an initial state, and each standard current value data range is the current value of each monitoring node measured when the switching power supply is connected with the load in the initial state.
In addition, to achieve the above object, the present application also provides a terminal device including: the fault detection system of the switching power supply, the memory, the processor and the computer program stored on the memory and capable of running on the processor, wherein the computer program realizes the steps of the fault detection method of the switching power supply when being executed by the processor.
In addition, in order to achieve the above object, the present application also provides a computer storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the fault detection method of a switching power supply as described above.
The application provides a fault detection system of a switching power supply, a fault detection method of the switching power supply, terminal equipment and a computer storage medium, wherein the fault detection system of the switching power supply comprises: the device comprises a switching power supply, a fault analysis module and an output detection module, wherein the switching power supply is electrically connected with the output detection module, the output detection module is electrically connected with the fault analysis module, and the switching power supply is electrically connected with the fault analysis module; the output detection module is used for reading the output information of the switching power supply and transmitting the output information to the fault analysis module; the fault analysis module comprises an electric signal detection unit and a data analysis unit; the electric signal detection unit is used for determining whether the output information accords with preset standard output information, and if not, collecting current values and voltage values of all monitoring nodes in the switching power supply; the data analysis unit is configured to compare a voltage value of each monitoring node with each standard voltage value data range, compare a current value of each monitoring node with each standard current value data range, and determine a fault cause of the switching power supply according to a comparison result, where each standard voltage value data range is a voltage value of each monitoring node measured when the switching power supply is connected to a load in an initial state, and each standard current value data range is a current value of each monitoring node measured when the switching power supply is connected to the load in the initial state.
Therefore, the fault detection system comprises the switching power supply, the fault analysis module and the output detection module for detecting the fault of the switching power supply, and the working state of the switching power supply is monitored in real time so as to determine whether the switching power supply has a fault or not in time when the switching power supply operates and determine the reason of the fault, thereby improving the fault detection efficiency of the switching power supply.
Drawings
Fig. 1 is a schematic device structure diagram of a hardware operating environment of a terminal device according to an embodiment of the present application;
fig. 2 is a schematic signal connection diagram of an embodiment of a fault detection system of a switching power supply according to an embodiment of the present application;
fig. 3 is a schematic diagram of a switching power supply according to an embodiment of a fault detection method of a switching power supply according to an embodiment of the present application;
fig. 4 is a schematic flow chart of an embodiment of a fault detection method for a switching power supply according to an embodiment of the present application.
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Referring to fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment of a terminal device according to an embodiment of the present application.
As shown in fig. 1, the terminal device may include: the processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005, and a fault detection system of a switching power supply designed with a fusion security module for processing data according to a plurality of communication security protocols. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., wi-Fi interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage system separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the structure shown in fig. 1 is not limiting of the terminal device, and that the terminal device provided by the present application may include more or less components than those illustrated, or may combine certain components, or may be a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, a user interface module, and a computer program may be included in the memory 1005, which is a type of computer storage medium.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a background server and performing data communication with the background server; the user interface 1003 is mainly used for connecting a client and communicating data with the client; and the processor 1001 may be configured to call a computer program stored in the memory 1005 and perform the steps of:
collecting current values and voltage values of all monitoring nodes in a switching power supply;
comparing the voltage value of each monitoring node with each standard voltage value data range, comparing the current value of each monitoring node with each standard current value data range, and determining the fault cause of the switching power supply according to the comparison result, wherein each standard voltage value data range is the voltage value of each monitoring node measured when the switching power supply is connected with a load in an initial state, and each standard current value data range is the current value of each monitoring node measured when the switching power supply is connected with the load in the initial state.
Based on the hardware operation environment related to the embodiment of the application, the overall conception of the fault detection system of the switching power supply provided by the embodiment of the application is provided.
With the continuous progress of technology and the continuous expansion of application fields, a switching power supply has become an indispensable important component in modern electronic equipment.
In the use process of the conventional switch power supply, the switch power supply is influenced by factors such as external environment corrosion, self electrical insulation performance and stability, and the like, so that faults can occur, and as a result, the internal electronic devices of the switch power supply are more, the circuit function is more complex, once the faults occur, the switch power supply is generally required to be comprehensively checked, the period for removing the faults is longer, inconvenience is brought to the use and maintenance of the switch power supply, and the running state of a matched electrical system is even influenced.
In summary, how to improve the fault detection efficiency of the switching power supply is clearly a problem to be solved in the art.
In order to solve the problems, the application provides a fault detection system of a switching power supply. The fault detection system of the switching power supply provided by the application comprises: the device comprises a switching power supply, a fault analysis module and an output detection module; the output detection module is used for reading the output information of the switching power supply and transmitting the output information to the fault analysis module; the fault analysis module comprises an electric signal detection unit and a data analysis unit, wherein the electric signal detection unit is used for determining whether output information accords with preset standard output information, and if not, collecting current values and voltage values of all monitoring nodes in the switching power supply; and the analysis module is used for determining the fault reason of the switching power supply according to the current value and the voltage value of each monitoring node.
Therefore, the fault detection system comprises the switching power supply, the fault analysis module and the output detection module for detecting the fault of the switching power supply, and the working state of the switching power supply is monitored in real time so as to determine whether the switching power supply has a fault or not in time when the switching power supply operates and determine the reason of the fault, thereby improving the fault detection efficiency of the switching power supply.
Based on the hardware operation environment related to the embodiment of the application and the overall conception of the fault detection system of the switching power supply, various embodiments of the fault detection system of the switching power supply are further provided.
Referring to fig. 2, fig. 2 is a schematic signal connection diagram of a fault detection system of a switching power supply according to a first embodiment of the application. It should be noted that the structure shown in fig. 2 does not limit the fault detection system of the switching power supply of the present application, and in some cases, the fault detection system of the switching power supply of the present application may include more or less components than those shown in the drawings, or may combine some components, or may have different arrangements of components.
In this embodiment, a fault detection system of a switching power supply includes: the device comprises a switching power supply, a fault analysis module and an output detection module, wherein the switching power supply is electrically connected with the output detection module, the output detection module is electrically connected with the fault analysis module, and the switching power supply is electrically connected with the fault analysis module; the output detection module is used for reading the output information of the switching power supply and transmitting the output information to the fault analysis module; the fault analysis module comprises an electric signal detection unit and a data analysis unit; the electric signal detection unit is used for determining whether the output information accords with preset standard output information, and if not, collecting current values and voltage values of all monitoring nodes in the switching power supply; the data analysis unit is configured to compare a voltage value of each monitoring node with each standard voltage value data range, compare a current value of each monitoring node with each standard current value data range, and determine a fault cause of the switching power supply according to a comparison result, where each standard voltage value data range is a voltage value of each monitoring node measured when the switching power supply is connected to a load in an initial state, and each standard current value data range is a current value of each monitoring node measured when the switching power supply is connected to the load in the initial state.
In this embodiment, the fault detection system of the switching power supply includes a switching power supply, a fault analysis module and an output detection module, when the switching power supply operates, the output detection module reads output information of the switching power supply through electrical connection with the switching power supply, and transmits the read output information to the fault analysis module based on electrical connection between the output detection module and the fault analysis module, the fault analysis module includes an electrical signal detection unit and a data analysis unit, whether the output information of the switching power supply accords with power supply input required by a connection load or not is determined through the electrical signal detection unit, namely whether the output information accords with preset standard output information or not is determined, if the output information does not accord with the preset standard output information, the switching power supply fails, the electrical signal detection unit collects electrical signal information of each monitoring node in the switching power supply, and the collected electrical signal information is subjected to data analysis through the data analysis unit, so as to determine a fault reason of the switching power supply.
Specifically, a data analysis unit in the fault detection system compares the voltage value of each monitoring node with each standard voltage value data range, compares the current value of each monitoring node with each standard current value data range, and determines the fault cause of the switching power supply according to the comparison result.
In this embodiment, the standard voltage value data range and the standard current value data range are the voltage value and the current value range of each monitoring node measured and determined when the switching power supply after leaving the factory is connected to the corresponding load in the initial state, and the preset standard information includes the current value and the voltage value required by the load connected to the switching power supply.
Optionally, in a feasible embodiment, the output detection module includes a circuit breaker, a voltmeter, a relay, a transformer and an ammeter, an input end of the circuit breaker is connected with an output end of the switching power supply, an output end of the circuit breaker is respectively connected with an input end of the relay and an input end of the voltmeter, an output end of the relay is connected with an input end of the transformer, and an output end of the transformer is respectively connected with an input end of the fault analysis module and the ammeter.
In this embodiment, as shown in fig. 2, the input end of the circuit breaker in the output detection module is connected with the output end of the switching power supply, the output end of the circuit breaker is respectively connected with the input end of the relay and the input end of the voltmeter for measuring the output voltage of the switching power supply, the output end of the relay is connected with the input end of the transformer, the output end of the transformer is respectively connected with the input end of the fault analysis module and the ammeter for measuring the output current of the switching power supply, and the read output information is transmitted to the fault analysis module for data analysis.
Optionally, in a possible embodiment, the switching power supply of the fault detection system of the switching power supply of the present application includes: the device comprises a rectification filter circuit, a control circuit, a main switch conversion isolation circuit and a rectification output circuit;
in this embodiment, as shown in fig. 3, an input end of a rectifying and filtering circuit of the switching power supply is connected to an external power supply, an output end of the rectifying and filtering circuit is connected to an input end of a control circuit, a feedback input end of the control circuit is connected to a feedback output end of a rectifying and output circuit, an output end of the control circuit is connected to an input end of a main switching and converting isolation circuit, an output end of the main switching and converting isolation circuit is connected to an input end of the rectifying and output circuit, and an output end of the rectifying and output circuit outputs a dc regulated voltage.
The output end of the rectifying and filtering circuit is provided with a first monitoring node;
in this embodiment, the rectifying and filtering circuit of the switching power supply is configured to directly rectify the ac power supply of the power grid into smoother dc power, and a first monitoring node is disposed at an output end of the rectifying and filtering circuit, where the first monitoring node is configured to detect a rectifying condition of a bridge rectifier diode in the rectifying and filtering circuit and a filtering condition after rectification, and an input power supply of the control circuit passes through the first monitoring node.
The oscillation output pin of the oscillation chip of the control circuit is provided with a second monitoring node, the reference voltage output pin of the oscillation chip is provided with a third monitoring node, and the current feedback pin of the oscillation chip is provided with a fourth monitoring node;
in this embodiment, the switching power supply is a pulse width modulator, and is mainly composed of a sampler, a comparator, an oscillation chip, a pulse width modulation circuit, a reference voltage circuit and other circuits, wherein the oscillation output pin of the oscillation chip is provided with a second monitoring node, the reference voltage output pin of the oscillation chip is provided with a third monitoring node, the current feedback pin of the oscillation chip is provided with a fourth monitoring node, the oscillation output pulse width of the oscillation chip is regulated according to the fed back size of the current feedback pin, the waveform change condition of the control circuit at the moment is determined through the second monitoring node and the third monitoring node, and the waveform change condition of the power supply under the condition of different output reloading powers is detected through the fourth monitoring node.
The output end of the main switch conversion isolation circuit is provided with a fifth monitoring node;
in this embodiment, a fifth monitoring node is disposed at an output end of a main switching isolation circuit of the switching power supply, and is used for observing a primary state and a waveform change condition when the output is output to a later stage of rectification.
The front-stage filter capacitor of the rectification output circuit is connected in series with a sixth monitoring node, the rear-stage filter capacitor of the rectification output circuit is connected in series with a seventh monitoring node, and the feedback circuit of the rectification output circuit is provided with an eighth monitoring node;
in this embodiment, the rectifying output circuit of the switching power supply includes a front-stage filter capacitor, a rear-stage filter capacitor, and a feedback circuit, where the front-stage filter capacitor is connected in series with a sixth monitoring node, the rear-stage filter capacitor is connected in series with a seventh monitoring node, and the feedback circuit is provided with an eighth monitoring node. Specifically, when the waveform of the fifth monitoring node is not abnormal and the waveform of the sixth monitoring node is abnormal, it is indicated that the preceding stage filter capacitor is faulty, when the waveform of the fifth monitoring node is not abnormal and the waveform of the seventh monitoring node is abnormal, it is indicated that the succeeding stage filter capacitor is faulty, and when the waveform of the eighth monitoring node is unstable in voltage, it is indicated that the feedback circuit is faulty.
Each monitoring node is electrically connected with the fault analysis module.
In this embodiment, each monitoring node provided in the switching power supply is electrically connected to the fault analysis module, so as to transmit electrical data of each node in the switching power supply to the fault analysis module for analysis and determination of a fault.
It should be noted that, in this embodiment, other monitoring nodes may be disposed at different positions in the circuit of the switching power supply based on actual use requirements, and the present application is not limited to the eight monitoring nodes in the above embodiment.
Optionally, in a possible embodiment, the fault detection system of the switching power supply of the present application further includes a fault prompting module, where the fault prompting module is electrically connected to the fault analysis module;
the fault prompting module comprises: the data display unit is used for displaying the current value and the voltage value of each monitoring node acquired by the electric signal detection unit; the fault display unit is used for displaying the fault reason of the switching power supply determined by the fault analysis module; and the fault alarm unit is used for sending out at least one of sound and light alarm prompts when the switching power supply is determined to be faulty.
In this embodiment, the fault detection system of the switching power supply further includes a fault prompting module, and the fault prompting module is electrically connected with the fault analysis module. The fault prompting module of the fault detection system comprises a data display unit, a fault display unit and a fault alarm unit, wherein the data display unit is used for displaying the current value and the voltage value of each monitoring node obtained by the electric signal detection unit, the fault display unit is used for displaying the fault reason of the switching power supply determined by the fault analysis module, and outputting preset text prompting content such as 'the former-stage filter capacitor fails', or displaying a circuit schematic diagram of the switching power supply on a display panel and marking the failed position as red, and the fault alarm unit is used for sending prompting sound and/or flashing a light to prompt a user that the switching power supply has failed when determining that the switching power supply has failed, so that the fault is required to be timely checked and maintained so as to avoid loss.
Optionally, in a possible embodiment, the fault analysis module of the fault detection system of the switching power supply of the present application is further configured to determine that the rectifying and filtering circuit is faulty if it is detected that the first voltage value of the first monitoring node is smaller than the first standard voltage value data range and the first current value of the first monitoring node is greater than the first standard current value data range; if the first voltage value accords with the first standard voltage value data range and the first current value accords with the first standard current value data range, and no voltage value is displayed on the second monitoring node, the third monitoring node and the fourth monitoring node, the oscillation chip of the control circuit is determined to be failed;
in this embodiment, a fault analysis module of the fault detection system performs fault analysis on the switching power supply according to received electrical signal data of each monitoring node in the switching power supply, and regarding the rectifying and filtering circuit, when the fault analysis module detects that only the input voltmeter has data, it is determined that a fuse of the switching power supply has a fault; if the value of the input ammeter of the first monitoring node is detected to be increased and the value of the working voltmeter is detected to be reduced, the bridge rectification in the rectification filter circuit is determined to be faulty. Regarding the control circuit, when the fault analysis module detects that the second monitoring node, the third monitoring node and the fourth monitoring node have no output voltage, the fault analysis module determines that the oscillation chip of the switching power supply has faults.
Optionally, in a possible embodiment, the fault analysis module of the fault detection system of the switching power supply of the present application is further configured to determine that the main switch transformation isolation circuit fails if it is detected that the fifth voltage value of the fifth monitoring node does not conform to the fifth standard voltage value data range and the fifth current value of the fifth monitoring node does not conform to the fifth standard current value data range.
In this embodiment, the fault analysis module of the fault detection system performs fault analysis on the switching power supply according to the received electrical signal data of each monitoring node in the switching power supply, and regarding the main switch transformation and isolation circuit, when it is detected that the fifth voltage value of the fifth monitoring node does not conform to the fifth standard voltage value data range and the fifth current value of the fifth monitoring node does not conform to the fifth standard current value data range, it is determined that the main switch transformation and isolation circuit fails.
Optionally, in a possible embodiment, the fault analysis module of the fault detection system of the switching power supply of the present application is further configured to determine that a preceding filter capacitor of the rectifying output circuit fails if it is detected that the sixth voltage value of the sixth monitoring node does not conform to the sixth standard voltage value data range and the sixth current value of the sixth monitoring node does not conform to the sixth standard current value data range;
if the seventh voltage value of the seventh monitoring node is detected to be not in accordance with the seventh standard voltage value data range and the seventh current value of the seventh monitoring node is detected to be not in accordance with the seventh standard current value data range, determining that a later stage filter capacitor of the rectification output circuit fails;
and if the eighth voltage value of the eighth monitoring node is detected to be not in accordance with the eighth standard voltage value data range and the eighth current value of the eighth monitoring node is detected to be not in accordance with the eighth standard current value data range, determining that a feedback circuit of the rectifying output circuit fails.
In this embodiment, the fault analysis module of the fault detection system performs fault analysis on the switching power supply according to the received electrical signal data of each monitoring node in the switching power supply, regarding the rectifying output circuit, the sixth monitoring node is connected in series with the front-stage filter capacitor, when the voltage value and the current value of the sixth monitoring node do not meet the standard voltage value and the standard current value, it is determined that the front-stage filter capacitor of the rectifying output circuit fails, the seventh monitoring node is connected in series with the rear-stage filter capacitor, when the voltage value and the current value of the seventh monitoring node do not meet the standard voltage value and the standard current value, it is determined that the rear-stage filter capacitor of the rectifying output circuit fails, the eighth monitoring node is arranged on the feedback circuit of the rectifying output circuit, and when the voltage value and the current value of the eighth monitoring node do not meet the standard voltage value and the standard current value, it is determined that the feedback circuit of the rectifying output circuit fails.
Therefore, the fault detection system of the switching power supply comprises the switching power supply, the fault analysis module and the output detection module for detecting the faults of the switching power supply, and the working state of the switching power supply is monitored in real time so as to determine whether the switching power supply has faults or not in time when the switching power supply operates, determine the reasons of the faults, and display the reasons of the faults and prompt the reasons of the faults in sound and light through the fault prompt module, so that a user can conveniently find the faults of the switching power supply in time, loss is prevented, and the fault detection efficiency of the switching power supply is improved.
Further, based on the embodiments of the fault detection system of the switching power supply of the present application, embodiments of the fault detection method of the switching power supply of the present application are provided.
It should be noted that the fault detection method of the switching power supply of the present application is applied to a switching power supply including a plurality of monitoring nodes. It should be understood that, based on different design requirements of practical applications, in different possible embodiments, the fault detection method of the switching power supply of the present application may of course also be applied to other terminal devices, and for convenience of understanding and explanation of the technical solution, the fault detection method of the switching power supply of the present application will be described below with the fault detection system as an implementation subject of implementation of the solution.
Referring to fig. 4, fig. 4 is a flowchart illustrating steps of an embodiment of a fault detection method for a switching power supply according to the present application. It should be noted that although a logic sequence is shown in the flowchart, in some cases, the fault detection method of the switching power supply of the present application may of course perform the steps shown or described in a different order from that shown or described herein.
As shown in fig. 4, the fault detection method for a switching power supply provided by the embodiment of the application may include the following steps:
step S10, determining whether the output information of the switching power supply accords with preset standard output information, and if not, acquiring current values and voltage values of all monitoring nodes in the switching power supply;
step S20, comparing the voltage value of each monitoring node with each standard voltage value data range, comparing the current value of each monitoring node with each standard current value data range, and determining the fault cause of the switching power supply according to the comparison result.
In this embodiment, the fault detection system reads the output information of the switching power supply through the output detection module, and transmits the output information to the fault analysis module, the fault analysis module determines whether the output information accords with preset standard output information, when it is determined that the output information of the switching power supply does not accord with the preset standard output information, that is, it is determined that the switching power supply fails, the fault detection system collects current values and voltage values of all monitoring nodes in the switching power supply through the electric signal detection unit, specifically, all monitoring nodes are connected to the electric signal collection module in the fault detection system through external connection wires, when the switching power supply starts to operate, the electric signal collection module collects the voltage values and the current values flowing through all monitoring nodes, then the fault detection system processes the collected voltage values and the collected current values through the data analysis unit, compares the voltage values of all monitoring nodes with all standard voltage values, compares the current values of all monitoring nodes with all standard current values, and determines whether the switching power supply fails or is the cause of the switching power supply failure according to the comparison result.
Specifically, when the fault detection system detects that the switching power supply only has the display of the input voltmeter and the other countless values are displayed, the fuse is determined to be damaged; when the value of an input ammeter of the switching power supply is increased and the value of a working voltmeter is reduced, determining a bridge rectifier fault in a switching power supply control circuit; when the switching power supply has no output voltage, determining that an oscillation chip of the control circuit fails; when the output voltage is significantly reduced, it is determined that the feedback circuit of the rectifying output circuit fails.
In this embodiment, the present application determines whether the switching power supply fails by reading the output information of the switching power supply, when determining that the switching power supply fails, collects the current value and the voltage value of each monitoring node in the switching power supply, then compares the voltage value of each monitoring node with each standard voltage value data range, compares the current value of each monitoring node with each standard current value data range, determines the failure cause of the switching power supply according to the voltage value comparison result and the current value comparison result, and finally displays the determined failure cause and maintenance prompt information corresponding to the failure cause.
Therefore, the fault detection system of the switching power supply comprises the switching power supply, the fault analysis module and the output detection module for detecting the fault of the switching power supply, and the working state of the switching power supply is monitored in real time so as to determine whether the switching power supply has the fault or not and determine the cause of the fault in time when the switching power supply operates, thereby improving the fault detection efficiency of the switching power supply.
The application also provides a terminal device, which comprises: the fault detection system, the memory, the processor and the computer program stored on the memory and capable of running on the processor of the switching power supply according to any one of the above embodiments, wherein the computer program is executed by the processor to implement the steps of the fault detection method of the switching power supply according to any one of the above embodiments.
The present application also provides a computer storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the fault detection method of a switching power supply as described in any of the above embodiments.
The specific embodiment of the computer storage medium of the present application is basically the same as the embodiments of the fault detection method of the switching power supply, and will not be described herein.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (9)
1. A fault detection system for a switching power supply, the system comprising: the device comprises a switching power supply, a fault analysis module and an output detection module, wherein the switching power supply is electrically connected with the output detection module, the output detection module is electrically connected with the fault analysis module, and the switching power supply is electrically connected with the fault analysis module;
the output detection module is used for reading the output information of the switching power supply and transmitting the output information to the fault analysis module;
the fault analysis module comprises an electric signal detection unit and a data analysis unit;
the electric signal detection unit is used for determining whether the output information accords with preset standard output information, and if not, collecting current values and voltage values of all monitoring nodes in the switching power supply;
the data analysis unit is used for comparing the voltage value of each monitoring node with each standard voltage value data range, comparing the current value of each monitoring node with each standard current value data range, and determining the fault cause of the switching power supply according to the comparison result, wherein each standard voltage value data range is the voltage value of each monitoring node measured when the switching power supply is connected with a load in an initial state, and each standard current value data range is the current value of each monitoring node measured when the switching power supply is connected with the load in the initial state;
the switching power supply includes: the device comprises a rectification filter circuit, a control circuit, a main switch conversion isolation circuit and a rectification output circuit;
the output end of the rectifying and filtering circuit is provided with a first monitoring node;
the oscillation output pin of the oscillation chip of the control circuit is provided with a second monitoring node, the reference voltage output pin of the oscillation chip is provided with a third monitoring node, and the current feedback pin of the oscillation chip is provided with a fourth monitoring node;
the fault analysis module is further configured to determine that the rectifying and filtering circuit fails if it is detected that the first voltage value of the first monitoring node is smaller than the first standard voltage value data range and the first current value of the first monitoring node is larger than the first standard current value data range; and if the first voltage value accords with the first standard voltage value data range and the first current value accords with the first standard current value data range, determining that the oscillation chip of the control circuit fails when no voltage value is displayed on the second monitoring node, the third monitoring node and the fourth monitoring node.
2. The fault detection system of the switching power supply according to claim 1, wherein the output detection module comprises a circuit breaker, a voltmeter, a relay, a transformer and an ammeter, wherein an input end of the circuit breaker is connected with an output end of the switching power supply, an output end of the circuit breaker is respectively connected with an input end of the relay and an input end of the voltmeter, an output end of the relay is connected with an input end of the transformer, and an output end of the transformer is respectively connected with an input end of the fault analysis module and the ammeter.
3. A fault detection system for a switching power supply as claimed in claim 1, wherein,
the output end of the main switch conversion isolation circuit is provided with a fifth monitoring node;
the front-stage filter capacitor of the rectification output circuit is connected in series with a sixth monitoring node, the rear-stage filter capacitor of the rectification output circuit is connected in series with a seventh monitoring node, and the feedback circuit of the rectification output circuit is provided with an eighth monitoring node;
each monitoring node is electrically connected with the fault analysis module.
4. The fault detection system of claim 3, further comprising a fault prompting module electrically connected to the fault analysis module;
the fault prompting module comprises: the data display unit is used for displaying the current value and the voltage value of each monitoring node acquired by the electric signal detection unit; the fault display unit is used for displaying the fault reason of the switching power supply determined by the fault analysis module; and the fault alarm unit is used for sending out at least one of sound and light alarm prompts when the switching power supply is determined to be faulty.
5. The fault detection system of claim 3, wherein the fault analysis module is further configured to determine that the main switching transformation isolation circuit is faulty if it is detected that the fifth voltage value of the fifth monitoring node does not meet a fifth standard voltage value data range and the fifth current value of the fifth monitoring node does not meet a fifth standard current value data range.
6. The fault detection system of claim 3, wherein the fault analysis module is further configured to determine that a pre-stage filter capacitor of the rectifying output circuit has failed if it is detected that the sixth voltage value of the sixth monitoring node does not conform to a sixth standard voltage value data range and the sixth current value of the sixth monitoring node does not conform to a sixth standard current value data range;
if the seventh voltage value of the seventh monitoring node is detected to be not in accordance with the seventh standard voltage value data range and the seventh current value of the seventh monitoring node is detected to be not in accordance with the seventh standard current value data range, determining that a later stage filter capacitor of the rectification output circuit fails;
and if the eighth voltage value of the eighth monitoring node is detected to be not in accordance with the eighth standard voltage value data range and the eighth current value of the eighth monitoring node is detected to be not in accordance with the eighth standard current value data range, determining that a feedback circuit of the rectifying output circuit fails.
7. A fault detection method for a switching power supply, characterized in that it is applied to a switching power supply including a plurality of monitoring nodes, and fault detection is performed using the fault detection system for a switching power supply according to any one of claims 1 to 6, the fault detection method for a switching power supply comprising:
determining whether the output information of the switching power supply accords with preset standard output information, and if not, acquiring current values and voltage values of all monitoring nodes in the switching power supply;
comparing the voltage value of each monitoring node with each standard voltage value data range, comparing the current value of each monitoring node with each standard current value data range, and determining the fault cause of the switching power supply according to the comparison result, wherein each standard voltage value data range is the voltage value of each monitoring node measured when the switching power supply is connected with a load in an initial state, and each standard current value data range is the current value of each monitoring node measured when the switching power supply is connected with the load in the initial state.
8. A terminal device, characterized in that the terminal device comprises: a memory, a processor, and a fault detection program for a switching power supply stored on the memory and operable on the processor, which when executed by the processor, implements the steps of the fault detection method for a switching power supply as claimed in claim 7.
9. A computer-readable storage medium, wherein a fault detection program of a switching power supply is stored on the computer-readable storage medium, and the fault detection program of the switching power supply, when executed by a processor, implements the steps of the fault detection method of the switching power supply according to claim 7.
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| CN113740759A (en) * | 2021-09-08 | 2021-12-03 | 上海地铁维护保障有限公司 | Switching power supply performance testing device |
| CN116827090B (en) * | 2023-08-29 | 2023-11-10 | 深圳市力生美半导体股份有限公司 | Switching power supply circuit and control method |
| CN117970167A (en) * | 2024-03-28 | 2024-05-03 | 深圳市力生美半导体股份有限公司 | Switching power supply fault prediction device and method and electronic equipment |
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