Contactor fault intelligent detection method

Abstract

The invention relates to the technical field of contactor fault detection, discloses an intelligent contactor fault detection method, and provides a dual detection mechanism in order to improve the detection efficiency and accuracy of an adhesion fault and an operation rejection fault of a contactor. According to the method, the contactors possibly having problems are quickly screened out, then the suspected faulty contactors are subjected to accurate multiple voltage detection to finally confirm the fault type, and the method combines the advantages of software and hardware, so that multiple voltage detection on each contactor is avoided, and the overall detection efficiency is improved; and the contactor with the suspected fault is detected for multiple times through voltage sampling, so that the detection accuracy can be greatly improved, and the detection result is ensured to be more reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of contactor fault detection, and in particular to an intelligent detection method for contactor fault. Background Art

[0002] With the vigorous development of the new energy vehicle industry, as an indispensable support system, charging piles, as a key infrastructure component, are experiencing unprecedented rapid growth. The widespread deployment of charging piles has not only greatly promoted the widespread application and popularization of electric vehicles, but also injected new vitality and power into the construction of urban smart grids and the efficient integration of renewable energy. At present, the field of charging pile technology is experiencing rapid development, from the early slow charging technology to the fast charging technology, from the independent operation of a single charging pile to the intelligent management system of multi-pile collaborative control, and various innovative technical solutions are emerging like mushrooms after rain.

[0003] However, with the rapid increase in the number of charging piles and the significant increase in system complexity, how to ensure the safe and stable operation of these key devices has become one of the important issues that need to be solved in the entire new energy vehicle industry chain. It is particularly noteworthy that the operating status of the contactor inside the charging pile plays a vital role in the safety of the entire charging process. Once the contactor fails, it will directly threaten the safety and reliability of the charging operation.

[0004] Unfortunately, the detection method currently commonly used in the industry, which mainly relies on primary voltage detection to determine the fault type of the contactor, has become increasingly limited. Specifically, the single voltage detection method is unable to distinguish whether the abnormal state of the contactor is caused by a refusal to operate fault (i.e., the contactor fails to close normally) or a sticking fault (i.e., the contactor fails to disconnect in time when it should disconnect). In the actual detection process of the system, whether the contactor fails to successfully close or fails to disconnect effectively, it will be manifested as the voltage value failing to reach the preset expected value. This common feature makes it difficult to accurately lock the specific cause of the fault by relying solely on primary voltage detection, which brings considerable challenges to subsequent troubleshooting and repair work.

[0005] Therefore, it is necessary to improve the existing technology.

[0006] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Summary of the invention

[0007] The present invention provides a contactor fault intelligent detection method to solve the problems existing in the prior art.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] In a first aspect, the present invention provides a contactor fault intelligent detection method, the method comprising:

[0010] S1, controlling the contactor to close, and collecting the level states of the positive and negative feedback signals of the contactor during the contactor closing process;

[0011] S2, determining whether the level state of the positive and negative feedback signals of the contactor is a low level; if so, executing S3, if not, executing S7;

[0012] S3, determining the state of the contactor as normal attraction;

[0013] S4, controlling the contactor to disconnect, and collecting the level status of the positive and negative feedback information of the contactor during the disconnection process of the contactor;

[0014] S5, determining whether the level state of the positive and negative feedback signals of the contactor is a high level; if so, executing S6, if not, executing S7;

[0015] S6, determining the state of the contactor to be normally disconnected, thereby determining that the contactor has no fault;

[0016] S7, determining the state of the contactor as a suspected fault;

[0017] S8. Performing multiple voltage sampling on the contactor suspected of failure to determine the failure type of the contactor suspected of failure, wherein the failure type includes a refusal to operate failure and a sticking failure.

[0018] Further, in the contactor fault intelligent detection method, S1 includes:

[0019] S1.1, setting the contactor to a high level to control the contactor to close;

[0020] S1.2. During the contactor closing process, the level states of the positive and negative feedback signals of the contactor are collected.

[0021] Further, in the contactor fault intelligent detection method, S2 includes:

[0022] S2.1, setting the contactor to a low level, and controlling the contactor to disconnect;

[0023] S2.2. When the contactor is disconnected, the level states of the positive and negative feedback signals of the contactor are collected.

[0024] Furthermore, in the contactor fault intelligent detection method, before S1, the method further includes:

[0025] S0. Check whether the feedback signal channel of the contactor is correctly connected and in an available state, and confirm through system calls whether the feedback signal interface is working normally and whether the positive and negative feedback signals are collected correctly.

[0026] Further, in the contactor fault intelligent detection method, S8 includes:

[0027] S8.1, control the contactor suspected of failure to close, and then collect voltage status data of the contactor for multiple times during the contactor closing process, and analyze the collected voltage status data in real time. If the voltage fails to drop in multiple samplings, or the drop speed does not meet expectations, it is determined that the fault type of the contactor is a refusal to operate fault;

[0028] S8.2. Control the contactor suspected of failure to disconnect, and then collect voltage status data of the contactor multiple times during the disconnection process of the contactor, and analyze the collected voltage status data in real time. If the voltage fails to recover to the system voltage during multiple sampling processes, or the voltage changes too slowly, it is determined that the fault type of the contactor is a adhesion fault.

[0029] Furthermore, in the contactor fault intelligent detection method, S8.1 is specifically:

[0030] The contactor suspected of having a fault is set to a high level, and the contactor suspected of having a fault is controlled to be energized. Then, during the energization process of the contactor, the voltage status data of the contactor is collected multiple times at preset time intervals until a preset number of sampling times is reached, and the collected voltage status data is analyzed in real time. If the voltage fails to drop during multiple samplings, or the drop speed does not meet expectations, the fault type of the contactor is determined to be a refusal to operate fault.

[0031] Furthermore, in the contactor fault intelligent detection method, S8.2 is specifically:

[0032] The contactor suspected of having a fault is set to a low level, and the contactor suspected of having a fault is controlled to disconnect. Then, during the disconnection process of the contactor, the voltage status data of the contactor is collected multiple times at preset time intervals until a preset number of sampling times is reached, and the collected voltage status data is analyzed in real time. If the voltage fails to recover to the system voltage during multiple sampling processes, or the voltage changes too slowly, it is determined that the fault type of the contactor is a adhesion fault.

[0033] Furthermore, in the contactor fault intelligent detection method, the method further includes:

[0034] The voltage sampling time interval and sampling times are preset.

[0035] In a second aspect, the present invention provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the contactor fault intelligent detection method provided in the first aspect is implemented.

[0036] In a third aspect, the present invention provides a computer-readable storage medium having computer-executable instructions stored thereon, wherein the computer-executable instructions are executed by a computer processor to implement the contactor fault intelligent detection method provided in the first aspect above.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The present invention provides an intelligent detection method for contactor faults. In order to improve the detection efficiency and accuracy of contactor adhesion faults and refusal to move faults, a dual detection mechanism is proposed: first, a preliminary feedback signal judgment is performed through a program to quickly screen out contactors that may have problems, and then accurate multiple voltage detections are performed on contactors suspected of faults to ultimately confirm the fault type. This method combines the advantages of software and hardware, and improves the overall detection efficiency by avoiding multiple voltage detections on each contactor. In addition, multiple detections of contactors suspected of faults are performed through voltage sampling, which greatly improves the detection accuracy and ensures that the detection results are more reliable.

[0039] The present invention has other features and advantages, which will be apparent from or will be described in detail in the accompanying drawings and the following detailed description incorporated herein, which together serve to explain the specific principles of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 It is a flow chart of a contactor fault intelligent detection method provided in the first embodiment of the present invention;

[0042] Figure 2 It is a structural diagram of a computer device provided in Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0043] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0044] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0045] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0046] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0047] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0048] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0049] In this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0050] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0051] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0052] Embodiment 1

[0053] In view of the defects of the above-mentioned prior art, the applicant, based on many years of rich practical experience and professional knowledge in this field, and in conjunction with the application of theory, actively conducts research and innovation in the hope of creating a technology that can solve the defects of the prior art. After continuous research and design, and after repeated trial production and improvement, the present invention with real practical value was finally created.

[0054] Please refer to Figure 1 The embodiment of the present invention provides a contactor fault intelligent detection method, which aims to significantly improve the detection efficiency and accuracy of contactor adhesion fault and refusal to operate fault. The method is suitable for detecting the working status of the contactor in the charging pile. The method specifically includes the following steps:

[0055] S1. Controlling the contactor to close, and collecting the level states of the positive and negative feedback signals of the contactor during the contactor closing process.

[0056] It should be noted that in this step, the system first sends a pull-in instruction to the target contactor to simulate the pull-in action under normal working conditions. At the same time, the level status of the positive and negative feedback signals of the contactor is collected in real time through the built-in sensor or detection circuit. These feedback signals can reflect the electrical characteristics of the contactor during the pull-in process and are an important basis for subsequent judgment of the contactor status.

[0057] In a specific implementation of this embodiment, the detailed operation of step S1 is further refined into the following two sub-steps:

[0058] S1.1, set the contactor to high level to control the contactor to close;

[0059] It should be noted that this step is the start-up phase of the contactor's pull-in process. First, the system sends a control signal to the contactor to set its input terminal to a high level state. The high-level signal is the trigger condition for the contactor's pull-in action, which prompts the electromagnet or corresponding drive mechanism inside the contactor to work, thereby closing the contact of the contactor, that is, realizing the pull-in action. This step ensures that the contactor can start the pull-in process normally after receiving the correct control signal.

[0060] S1.2. During the contactor closing process, the level status of the positive and negative feedback signals of the contactor is collected.

[0061] It should be noted that this step follows step S1.1. Once the contactor starts to close, the system immediately starts the feedback signal acquisition mechanism. This mechanism monitors and collects the level status of the positive and negative feedback signals of the contactor in real time through built-in sensors or detection circuits. Positive and negative feedback signals are usually used to indicate the current status of the contactor, such as whether it is fully closed, whether there is an abnormality, etc. Collecting these signals during the closing process is crucial for subsequent judgment of the closing status of the contactor and whether there is a fault.

[0062] Through the precise operation of these two sub-steps, the system can accurately control the contactor's closing action and obtain the contactor's status information in real time during the closing process, providing reliable data support for subsequent judgment and processing.

[0063] S2, determine whether the level state of the positive and negative feedback signals of the contactor is a low level; if so, execute S3, if not, execute S7.

[0064] It should be noted that when the contactor is normally energized, the level state of its positive and negative feedback signals should usually be low. Therefore, the system will judge the collected level state. If the level state is low, it indicates that the contactor may have been normally energized, and enter the next step; if the level state is not low, it indicates that the contactor may be abnormal, and directly jump to the troubleshooting step, that is, S7.

[0065] In a specific implementation of this embodiment, the detailed operation of step S2 is further refined into the following two sub-steps:

[0066] S2.1, setting the contactor to a low level, and controlling the contactor to disconnect;

[0067] It should be noted that this step is the start-up phase of the contactor disconnection process. The system sends a control signal to the contactor to set its input terminal to a low level state. The low-level signal is the trigger condition for the contactor disconnection action, which causes the electromagnet or corresponding drive mechanism inside the contactor to release, thereby separating the contact points of the contactor, that is, realizing the disconnection action. This step ensures that the contactor can start the disconnection process normally after receiving the correct control signal.

[0068] S2.2. When the contactor is disconnected, the level states of the positive and negative feedback signals of the contactor are collected.

[0069] It should be noted that this step follows step S2.1. Once the contactor starts to disconnect, the system immediately starts the feedback signal acquisition mechanism. This mechanism monitors and collects the level status of the positive and negative feedback signals of the contactor in real time through built-in sensors or detection circuits. Collecting these signals during the disconnection process is also crucial for subsequent judgment of the disconnection status of the contactor and whether there is a fault.

[0070] S3, determining the state of the contactor to be normally attracted.

[0071] It should be noted that when the system confirms that the level state of the positive and negative feedback signals of the contactor is low, it can be preliminarily determined that the contactor has been normally closed, and the next step is to detect the disconnection state of the contactor.

[0072] S4. Control the contactor to disconnect, and during the disconnection process of the contactor, collect the level states of the positive and negative feedback information of the contactor.

[0073] It should be noted that after confirming that the contactor is normally energized, the system then sends a disconnection command to the contactor to simulate the disconnection action under normal working conditions. Similarly, the level state of the positive and negative feedback information of the contactor is collected in real time through sensors or detection circuits to provide a basis for subsequent judgment.

[0074] S5, determining whether the level state of the positive and negative feedback signals of the contactor is a high level; if so, executing S6, if not, executing S7.

[0075] It should be noted that when the contactor is disconnected normally, the level state of its positive and negative feedback signals should usually be high. The system will judge the collected level state. If the level state is high, it indicates that the contactor may have been disconnected normally, and proceed to the next step; if the level state is not high, it indicates that the contactor may be abnormal, and jump to the troubleshooting step, that is, S7.

[0076] S6. Determine the state of the contactor as being normally disconnected, thereby determining that the contactor has no fault.

[0077] It should be noted that when the system confirms that the level state of the positive and negative feedback signals of the contactor is high, it can be determined that the contactor has been disconnected normally, and there is no abnormality in the entire pull-in-disconnection process, so it is determined that the contactor has no fault.

[0078] S7. Determine the state of the contactor as a suspected fault.

[0079] It should be noted that if the level of the positive and negative feedback signals of the contactor does not match the expected level during the closing or opening process, the system will determine that the contactor is in a suspected fault state. At this time, it is necessary to enter a more in-depth troubleshooting step.

[0080] The S1-S7 steps are the first stage, i.e., preliminary screening by software, which has the following advantages:

[0081] (1) Rapid screening:

[0082] By reading the positive and negative feedback signals of the contactors in real time, the program can quickly traverse multiple groups of contactors and quickly determine the status of each group of contactors. This method is particularly suitable for the preliminary screening of large-scale contactor systems. It can complete the preliminary detection of all contactors in a very short time, significantly improving the detection efficiency. Compared with the method of performing voltage detection one by one, the program feedback signal judgment can complete basic fault screening within a few seconds, reducing the time required for overall detection.

[0083] (2) Low implementation cost and low system complexity:

[0084] Feedback signal judgment is implemented through software, and almost no additional hardware support is required. It only needs to read the high and low levels of the contactor feedback signal for simple logical judgment. This method has low implementation cost and does not increase the complexity of the system architecture. It is very suitable for rapid integration in existing systems. In this way, the hardware investment of the system can be reduced, while reducing the technical burden when the system is updated or expanded.

[0085] (3) Reduce the workload of subsequent voltage detection:

[0086] Program feedback signal judgment can effectively screen out contactors that are suspected of having problems, thus avoiding voltage detection on every contactor. Through preliminary feedback signal screening, the focus is on contactors that may have faults, reducing the objects of subsequent voltage detection, thereby improving the overall detection efficiency. Voltage detection is usually more time-consuming than feedback signal detection. Eliminating the normal working group in advance through program judgment can save a lot of time and resources for subsequent voltage detection.

[0087] S8. Performing multiple voltage sampling on the contactor suspected of failure to determine the failure type of the contactor suspected of failure, wherein the failure type includes a refusal to operate failure and a sticking failure.

[0088] It should be noted that for contactors suspected of failure, the system will use multiple voltage sampling techniques to accurately measure their voltage values ​​in different states. By comparing and analyzing these voltage values, the system can further determine the type of contactor failure, including refusal to operate (i.e., the contactor cannot be closed) and adhesion failure (i.e., the contactor cannot be disconnected). This step combines the advantages of software and hardware, and greatly improves the accuracy and reliability of fault detection through precise voltage sampling and data analysis.

[0089] In one implementation of this embodiment, S8 includes:

[0090] S8.1, control the contactor suspected of failure to close, and then collect voltage status data of the contactor for multiple times during the contactor closing process, and analyze the collected voltage status data in real time. If the voltage fails to drop in multiple samplings, or the drop speed does not meet expectations, it is determined that the fault type of the contactor is a refusal to operate fault;

[0091] It should be noted that when normally energized, the voltage should drop from the initial system voltage to close to 0V within the set time.

[0092] S8.2. Control the contactor suspected of failure to disconnect, and then collect voltage status data of the contactor multiple times during the disconnection process of the contactor, and analyze the collected voltage status data in real time. If the voltage fails to recover to the system voltage during multiple sampling processes, or the voltage changes too slowly, it is determined that the fault type of the contactor is a adhesion fault.

[0093] It should be noted that during normal disconnection, the voltage should gradually return to the system voltage value within the set time.

[0094] In one implementation of this embodiment, S8.1 is specifically:

[0095] The contactor suspected of having a fault is set to a high level, and the contactor suspected of having a fault is controlled to be energized. Then, during the energization process of the contactor, the voltage status data of the contactor is collected multiple times at preset time intervals until a preset number of sampling times is reached, and the collected voltage status data is analyzed in real time. If the voltage fails to drop during multiple samplings, or the drop speed does not meet expectations, the fault type of the contactor is determined to be a refusal to operate fault.

[0096] In one implementation of this embodiment, S8.2 is specifically:

[0097] The contactor suspected of having a fault is set to a low level, and the contactor suspected of having a fault is controlled to disconnect. Then, during the disconnection process of the contactor, the voltage status data of the contactor is collected multiple times at preset time intervals until a preset number of sampling times is reached, and the collected voltage status data is analyzed in real time. If the voltage fails to recover to the system voltage during multiple sampling processes, or the voltage changes too slowly, it is determined that the fault type of the contactor is a adhesion fault.

[0098] In one implementation of this embodiment, the method further includes:

[0099] The voltage sampling time interval and sampling times are preset.

[0100] It should be noted that in one implementation of this embodiment, in order to ensure the accuracy of voltage sampling and the reliability of fault determination, the system also pre-sets the time interval and sampling times of voltage sampling. These parameters are optimized and set according to the characteristics of the contactor and system requirements to ensure that sufficient voltage change information can be captured during the detection process, so as to make accurate fault determination.

[0101] The step S8 is the second stage, that is, for the screened suspected faulty contactors, multiple voltage sampling tests are performed, which has the following advantages:

[0102] (1) High-precision judgment to ensure detection accuracy:

[0103] Voltage detection can provide very accurate contactor status judgment through multiple sampling. Unlike the simple high and low levels of the feedback signal, voltage sampling can capture small changes in the contactor's working state, thereby more accurately judging whether the contactor is in normal operation, adhesion fault, or refusal to operate fault state. Multiple voltage sampling can capture the real-time voltage changes of the contactor during the operation process, ensuring that the detection results are more reliable, especially when dealing with complex or hidden faults, the high accuracy of voltage detection is particularly important.

[0104] (2) Detailed distinction of fault types to support accurate maintenance:

[0105] Voltage detection can carefully distinguish the fault types of the contactor, including adhesion fault (the contactor cannot be disconnected and the contacts remain closed) and refusal to move fault (the contactor cannot be attracted and the contacts fail to close). This precise fault type distinction can provide more specific guidance for subsequent repairs and maintenance, avoiding blind repairs caused by inaccurate fault judgment. At the same time, voltage detection can also detect subtle faults that feedback signals cannot capture, such as mechanical stagnation or slow movement of the contactor, further improving the overall detection capability of the system.

[0106] (3) Improve system reliability and reduce misjudgment rate:

[0107] Voltage detection can greatly reduce the probability of false alarms and missed alarms by performing multiple detections through voltage sampling, especially when facing complex working environments or multiple contactors working at the same time. The reliability of voltage detection far exceeds that of detection that relies solely on feedback signals. In some cases, feedback signals may be affected by electrical noise or transient interference, while voltage detection can provide more stable results, ensuring that the system maintains highly reliable detection results in various environments, further reducing system misjudgment and maintenance costs.

[0108] Although the terms such as contactor, disconnection, and pull-in are used more frequently in this application, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

[0109] An intelligent detection method for contactor faults provided by an embodiment of the present invention innovatively designs and implements a set of dual detection mechanisms, which are divided into two core links: the first step is to use a program to perform a preliminary analysis of the feedback signal, so as to quickly screen out contactors that may have abnormal conditions. This process effectively narrows the scope of subsequent detection and improves work efficiency; then, for contactors that are initially judged to be suspected of faults, multiple voltage detection technologies are used to conduct detailed review and confirmation to accurately determine the specific type of fault. This method cleverly combines the dual advantages of software and hardware as a whole: on the one hand, through the preliminary screening of the software, unnecessary and time-consuming multiple voltage detections of all contactors are avoided, thereby significantly improving the efficiency of the overall detection process; on the other hand, for the screened suspected faulty contactors, multiple voltage sampling tests are performed to further enhance the depth and accuracy of the detection, ensuring the reliability and authority of the final detection results.

[0110] Embodiment 2

[0111] Figure 2 A schematic diagram of the structure of a computer device provided in Embodiment 2 of the present invention. Figure 2A block diagram of an exemplary computer device 12 suitable for use in implementing embodiments of the present invention is shown. Figure 2 The computer device 12 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0112] like Figure 2 As shown, the computer device 12 is in the form of a general-purpose computing device. The components of the computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that connects various system components (including the system memory 28 and the processing unit 16).

[0113] Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor or a local bus using any of a variety of bus architectures. By way of example, these architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MAC) bus, an Enhanced ISA bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus.

[0114] The computer device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the computer device 12, including volatile and non-volatile media, removable and non-removable media.

[0115] The system memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The computer device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be used to read and write non-removable, non-volatile magnetic media ( Figure 2 not shown, usually called a "hard drive"). Although Figure 2 Not shown in the figure, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk"), and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, a DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the various embodiments of the present invention.

[0116] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in the memory 28, such program modules 42 including but not limited to an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment. The program modules 42 generally perform the functions and / or methods of the embodiments described herein.

[0117] The computer device 12 may also communicate with one or more external devices 14 (e.g., keyboards, pointing devices, displays 24, etc.), one or more devices that enable a user to interact with the computer device 12, and / or any device that enables the computer device 12 to communicate with one or more other computing devices (e.g., network cards, modems, etc.). Such communication may be performed via an input / output (I / O) interface 22. Furthermore, the computer device 12 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 20. As shown, the network adapter 20 communicates with the other modules of the computer device 12 via the bus 18. It should be understood that although Figure 2 Not shown, other hardware and / or software modules may be used in conjunction with computer device 12, including but not limited to microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0118] The processing unit 16 executes various functional applications and data processing by running the programs stored in the system memory 28, such as implementing the contactor fault intelligent detection method provided in the embodiment of the present invention.

[0119] Embodiment 3

[0120] Embodiment 3 of the present invention provides a computer-readable storage medium on which computer-executable instructions are stored. When the instructions are executed by a processor, the contactor fault intelligent detection method provided in all the embodiments of the present application is implemented.

[0121] Any combination of one or more computer-readable media may be used. A computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, device, or device.

[0122] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0123] Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0124] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0125] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A contactor fault intelligent detection method, characterized in that: The method comprises: S1, controlling the contactor to close, and collecting the level states of the positive and negative feedback signals of the contactor during the contactor closing process; S2, determining whether the level state of the positive and negative feedback signals of the contactor is a low level; if so, executing S3, if not, executing S7; S3, determining the state of the contactor as normal attraction; S4, controlling the contactor to disconnect, and collecting the level status of the positive and negative feedback information of the contactor during the disconnection process of the contactor; S5, determining whether the level state of the positive and negative feedback signals of the contactor is a high level; if so, executing S6, if not, executing S7; S6, determining the state of the contactor to be normally disconnected, thereby determining that the contactor has no fault; S7, determining the state of the contactor as a suspected fault; S8. Performing multiple voltage sampling on the contactor suspected of failure to determine the failure type of the contactor suspected of failure, wherein the failure type includes a refusal to operate failure and a sticking failure.

2. The contactor fault intelligent detection method according to claim 1, characterized in that: The S1 includes: S1.1, setting the contactor to a high level to control the contactor to close; S1.

2. During the contactor closing process, the level states of the positive and negative feedback signals of the contactor are collected.

3. The contactor fault intelligent detection method according to claim 1, characterized in that: The S2 includes: S2.1, setting the contactor to a low level, and controlling the contactor to disconnect; S2.

2. When the contactor is disconnected, the level states of the positive and negative feedback signals of the contactor are collected.

4. The contactor fault intelligent detection method according to claim 1, characterized in that: Before S1, the method further includes: S0. Check whether the feedback signal channel of the contactor is correctly connected and in an available state, and confirm through system calls whether the feedback signal interface is working normally and whether the positive and negative feedback signals are collected correctly.

5. The contactor fault intelligent detection method according to claim 1, characterized in that: The S8 includes: S8.1, control the contactor suspected of failure to close, and then collect voltage status data of the contactor for multiple times during the contactor closing process, and analyze the collected voltage status data in real time. If the voltage fails to drop in multiple samplings, or the drop speed does not meet expectations, it is determined that the fault type of the contactor is a refusal to operate fault; S8.

2. Control the contactor suspected of failure to disconnect, and then collect voltage status data of the contactor multiple times during the disconnection process of the contactor, and analyze the collected voltage status data in real time. If the voltage fails to recover to the system voltage during multiple sampling processes, or the voltage changes too slowly, it is determined that the fault type of the contactor is a adhesion fault.

6. The contactor fault intelligent detection method according to claim 5, characterized in that: The S8.1 is specifically: The contactor suspected of having a fault is set to a high level, and the contactor suspected of having a fault is controlled to be energized. Then, during the energization process of the contactor, the voltage status data of the contactor is collected multiple times at preset time intervals until a preset number of sampling times is reached, and the collected voltage status data is analyzed in real time. If the voltage fails to drop during multiple samplings, or the drop speed does not meet expectations, the fault type of the contactor is determined to be a refusal to operate fault.

7. The contactor fault intelligent detection method according to claim 5, characterized in that: The S8.2 is specifically: The contactor suspected of having a fault is set to a low level, and the contactor suspected of having a fault is controlled to disconnect. Then, during the disconnection process of the contactor, the voltage status data of the contactor is collected multiple times at preset time intervals until a preset number of sampling times is reached, and the collected voltage status data is analyzed in real time. If the voltage fails to recover to the system voltage during multiple sampling processes, or the voltage changes too slowly, it is determined that the fault type of the contactor is a adhesion fault.

8. The contactor fault intelligent detection method according to claim 6 or 7, characterized in that: The method further comprises: The voltage sampling time interval and sampling times are preset.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the contactor fault intelligent detection method according to any one of claims 1 to 8 is implemented.

10. A computer-readable storage medium having computer-executable instructions stored thereon, characterized in that: The computer executable instructions are executed by a computer processor to implement the contactor fault intelligent detection method according to any one of claims 1 to 8.

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