Equipment, bus voltage detection method and device thereof, storage medium and program product

Abstract

The invention provides equipment and a bus voltage detection method and device thereof, a storage medium and a program product, a control system of the equipment comprises a main drive integrated board, and the main drive integrated board is integrated with a drive module and a main control module. Comprising the steps that when it is detected that the bus voltage of the main drive integrated board is lower than a preset low-voltage protection set value, whether the drop rate of the bus voltage is larger than a set threshold value or not is judged; if it is judged that the drop rate of the bus voltage is larger than a set threshold value, it is determined that the device is in a power-off state; if it is judged that the drop rate of the bus voltage is smaller than or equal to a set threshold value, it is determined that power supply of the equipment is abnormal. According to the scheme provided by the invention, the main drive integrated control system can be prevented from misreporting a voltage fault due to slow drop of the bus voltage in the power-off process.

Description

Technical Field

[0001] This invention relates to the field of control, and more particularly to a device and its bus voltage detection method, apparatus, storage medium, and program product. Background Technology

[0002] In related technologies, the control system of an air conditioning fan coil unit system consists of a fan drive board, a main control board, and a wired controller. The fan drive board drives the DC fan and provides status feedback, the main control board controls the fan operation and processes sensor data, and the wired controller displays the operating status and sets control parameters. Because the fan drive board has a large capacitor, while the main control board does not, it quickly loses power after a power outage, thus preventing false alarms.

[0003] With increasing system integration, the control system for air conditioning fan coil units has evolved into a structure of "integrated main drive board + wired controller". The integrated main drive board integrates bus voltage protection, enabling it to detect whether the bus voltage is normal. However, due to the large capacitor on the bus, the bus voltage will slowly decrease after a power outage. During this period, the main controller and wired controller can still operate, causing the system to misinterpret it as an abnormal power supply voltage and report a fault. At this point, the system may enter a locked state, and even after power is restored, it cannot immediately resume operation, affecting system availability and user experience. Summary of the Invention

[0004] The main objective of this invention is to overcome the deficiencies of the aforementioned related technologies and provide a device and its bus voltage detection method, apparatus, storage medium, and program product to solve the problem of false voltage fault reports caused by the slow drop in bus voltage during power failure in the main drive integrated control system of the related technologies.

[0005] This invention provides a method for detecting bus voltage in a device, characterized in that the control system of the device includes: a main drive integrated board, the main drive integrated board integrating a drive module and a main control module, and the bus voltage detection method includes: when the bus voltage of the main drive integrated board is detected to be lower than a preset low-voltage protection setting value, determining whether the rate of decrease of the bus voltage is greater than a set threshold; if the rate of decrease of the bus voltage is greater than the set threshold, determining that the device is in a power-off state; if the rate of decrease of the bus voltage is less than or equal to the set threshold, determining that the device is in a power supply abnormality.

[0006] Optionally, it also includes: after determining that the power supply of the device is abnormal, if the bus voltage returns to normal within a set time, the fault information is not displayed; if the bus voltage does not return to normal within the set time, the fault information is displayed.

[0007] Optionally, the control system of the device further includes: a wired controller; displaying fault information includes: sending the fault information to the wired controller to display the fault information on the wired controller.

[0008] Optionally, it also includes: triggering a unit lockout operation when the number of times the power supply abnormality of the device is determined to be more than a set number within a preset time period.

[0009] Optionally, the device includes an air conditioning fan coil unit, and the main drive integrated board integrates a fan drive module and a main control module.

[0010] In another aspect, the present invention provides a bus voltage detection device for a device. The control system of the device includes: a main drive integrated board, the main drive integrated board integrating a drive module and a main control module. The bus voltage detection device includes: a judgment unit, used to determine whether the rate of decrease of the bus voltage is greater than a preset low-voltage protection setting value when the bus voltage of the main drive integrated board is detected to be lower than a preset low-voltage protection setting value; and a determination unit, used to determine that the device is in a power-off state if the judgment unit determines that the rate of decrease of the bus voltage is greater than the preset threshold; and to determine that the device is in a power-off state if the judgment unit determines that the rate of decrease of the bus voltage is less than or equal to the preset threshold.

[0011] Optionally, it further includes: a display unit, configured to, after the determining unit determines that the power supply of the device is abnormal, not display fault information if the bus voltage returns to normal within a set time; and display fault information if the bus voltage does not return to normal within the set time.

[0012] Optionally, the control system of the device further includes: a wired controller; the display unit displays fault information, including: sending the fault information to the wired controller to display the fault information on the wired controller.

[0013] Optionally, it also includes: a locking unit, used to trigger a unit locking operation when the number of times the power supply abnormality of the device is determined to exceed a set number within a preset time.

[0014] Optionally, the device is an air conditioning fan coil unit, and the main drive integrated board integrates a fan drive module and a main control module.

[0015] In another aspect, the present invention provides a storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the methods described above.

[0016] In another aspect, the present invention provides an apparatus including a processor, a memory, and a computer program stored in the memory that can run on the processor, wherein the processor executes the program to implement the steps of any of the methods described above.

[0017] In another aspect, the present invention provides an apparatus comprising a control device for any of the aforementioned apparatuses.

[0018] In another aspect, the present invention provides a computer program product, including a computer program that, when executed by a processor, implements the steps of any of the methods described above.

[0019] According to the technical solution of this invention, by detecting the rate of change of bus voltage attenuation, it can be determined whether the voltage drop is caused by a power outage or a power supply abnormality, thereby deciding whether to report a fault and avoiding false alarms. By delaying the fault display time, a fault is reported only after the voltage abnormality has persisted for a certain period of time, improving system stability. Through a non-locking fault accumulation mechanism, the unit is locked only after multiple faults within a certain period of time, avoiding downtime caused by occasional faults, improving user experience and system reliability. The technical solution of this invention solves the technical problem of false voltage fault reports caused by the slow drop in bus voltage during power outages in integrated main drive fan coil control systems, leading to unit lock-up and inability to start in a timely manner. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of an embodiment of the bus voltage detection method for the device provided by the present invention; Figure 2 A schematic diagram of the control system is shown; Figure 3 This is a schematic diagram of another embodiment of the bus voltage detection method for the device provided by the present invention; Figure 4 This is a schematic diagram of a specific embodiment of the bus voltage detection method for the device provided by the present invention; Figure 5 This is a structural block diagram of an embodiment of the bus voltage detection device provided by the present invention; Figure 6 This is a structural block diagram of another embodiment of the bus voltage detection device provided by the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] In the relevant technologies, there is no effective solution to avoid the problem of false bus voltage faults in the main drive integrated structure when the power is off. Therefore, there is an urgent need for a detection method that can accurately determine the fault type and avoid false alarms.

[0024] This invention provides a method for detecting bus voltage in a device.

[0025] The control system of the device includes a main drive integrated board, which integrates a drive module and a main control module; that is, the main drive integrated board integrates the functions of a drive board and a main control board. A capacitor is provided on the bus of the main drive integrated board to stabilize the power supply voltage. The capacitor is preferably a large capacitor, such as a capacitor with a capacitance exceeding 100uF, for example, a 470uF capacitor. The control system of the device may also include a wired controller, to which the main drive integrated board is connected. For example, Figure 2 A schematic diagram of the control system is shown. The device is, for example, an air conditioning fan coil unit. The control system for the fan coil unit includes: a main drive integrated board and a wired controller. The main drive integrated board integrates a fan drive module and a main control module. The main drive integrated board is used to control the fan operation, collect sensor signals, and control related loads.

[0026] Figure 1 This is a schematic diagram of an embodiment of the bus voltage detection method for the device provided by the present invention.

[0027] like Figure 1As shown, according to an embodiment of the present invention, the bus voltage detection method includes at least steps S110, S120 and S130.

[0028] Step S110: When the bus voltage is detected to be lower than the preset low voltage protection setting value, determine whether the rate of decrease of the bus voltage is greater than the set threshold.

[0029] In the event of a power outage, the bus voltage will slowly decrease, and the main drive integrated board can still operate for a period of time. The main drive integrated board is equipped with a bus voltage sampling circuit to monitor the bus voltage in real time. For example, this circuit acquires the voltage signal through a high-speed ADC (analog-to-digital converter), which is then processed by the control chip. When the bus voltage is detected to be lower than a preset low-voltage protection setting, it further determines whether the rate of decrease of the bus voltage exceeds a set threshold.

[0030] Step S120: If it is determined that the rate of decrease of the bus voltage is greater than a set threshold, then the device is determined to be in a power-off state.

[0031] Step S130: If the rate of decrease of the bus voltage is less than or equal to a set threshold, then the power supply of the equipment is determined to be abnormal.

[0032] Specifically, in the event of a power outage, the bus voltage will drop slowly, and the main drive integrated board can still operate for a period of time. Therefore, if the rate of decrease of the bus voltage is greater than a set threshold, it is determined to be a power outage state, and no fault alarm is triggered; if the rate of decrease of the bus voltage is less than or equal to the set threshold, it is determined that the equipment is supplying abnormally, and a fault alarm is triggered.

[0033] According to the above embodiments of the present invention, when the bus voltage is detected to be lower than the preset low voltage protection setting value, the voltage drop is determined by the attenuation rate (drop rate) of the bus voltage to determine whether the voltage drop is caused by a power outage or an abnormal power supply, thereby deciding whether to report a fault and avoiding false fault reports.

[0034] Figure 3 This is a schematic diagram of another embodiment of the bus voltage detection method for the device provided by the present invention.

[0035] like Figure 3 As shown, according to another embodiment of the present invention, the bus voltage detection method further includes step S140.

[0036] Step S140: After determining that the power supply of the device is abnormal, if the bus voltage returns to normal within a set time, no fault information will be displayed; if the bus voltage does not return to normal within a set time, fault information will be displayed.

[0037] For example, upon detecting an abnormal bus voltage, a fault is recorded, a timer is started, and the voltage status is continuously monitored. If the voltage returns to normal within a set time (e.g., 200 seconds), no fault is displayed; if the voltage remains abnormal for longer than the set time, fault information is displayed. Specifically, the fault information can be sent to the wired controller for display. The main drive integrated board transmits the fault information to the wired controller via a communication bus (e.g., homebus). The wired controller displays the corresponding fault information according to the main control command and allows the user to perform a reset operation.

[0038] According to the above embodiments of the present invention, a fault delay display mechanism is adopted. After detecting an abnormal bus voltage, the fault is displayed only after the abnormal voltage has lasted for a period of time. On the one hand, this can avoid false alarms caused by voltage fluctuations. On the other hand, it can ensure that the main drive integrated board's power is consumed within a set time in the event of a power outage due to an abnormal bus voltage, so that there is no possibility of false alarms.

[0039] Optionally, based on any of the above embodiments, the method further includes: triggering a unit lockout operation when the number of times the power supply of the device is determined to be abnormal within a preset time exceeds a set number.

[0040] If the number of times the power supply failure of the equipment is detected exceeds a set number within a preset time period, the unit lockout operation is triggered. If the number of times the power supply failure of the equipment is detected does not exceed the set number within the preset time period, the unit lockout operation is not triggered.

[0041] Specifically, the system records the number of power supply anomalies within a preset time period (e.g., 1 hour). If the number of anomalies within this time window does not exceed a set number (e.g., 6 times), the unit will not be locked. If the set number is exceeded, the unit locking mechanism is triggered to prevent frequent anomalies from damaging the system. Once the unit is locked, the user cannot adjust the unit's operating parameters. For example, the main control module of the main drive integrated board sends a fan stop command to the fan drive module, keeping the fan in a stopped state. Even if the user adjusts the fan speed, it will be ineffective; the fan will only return to normal operation after the fault is manually cleared.

[0042] According to the above embodiments of the present invention, when the cumulative number of faults reaches a set number, a unit locking mechanism is triggered to prevent frequent anomalies from damaging the system.

[0043] To clearly illustrate the technical solution of the present invention, the execution flow of the bus voltage detection method of the device provided by the present invention will be described below with a specific embodiment.

[0044] Figure 4 This is a schematic diagram of a specific embodiment of the bus voltage detection method for the device provided by the present invention. Figure 4As shown, bus voltage detection is performed. In the event of a power outage, the bus voltage will slowly decrease. When the bus voltage is detected to be lower than the low-voltage protection setting, the rate of voltage change is further analyzed. If the rate of voltage change (decline rate) exceeds a set threshold, it is determined to be a power outage, and no fault is processed. If the voltage decline rate is lower than the set threshold and the voltage is lower than the protection value, it is determined to be a power supply abnormality. After detecting a bus voltage abnormality, a fault is recorded, and the system starts a timer to continuously monitor the voltage status. If the voltage returns to normal within a set time (e.g., 200 seconds), no fault information is displayed. If the voltage remains abnormal for more than the set time, the fault information is sent to the line controller, and the fault information is displayed on the line controller. The number of faults within a unit of time (e.g., 1 hour) is recorded. If the number of faults within this time window does not exceed a set threshold (e.g., 6 times), the unit operation is not locked. If the set number is exceeded, the unit locking mechanism is triggered to prevent frequent abnormalities from damaging the system.

[0045] The present invention also provides a bus voltage detection device for an equipment.

[0046] The control system of the device includes a main drive integrated board, which integrates a drive module and a main control module; that is, the main drive integrated board integrates the functions of a drive board and a main control board. A capacitor is provided on the bus of the main drive integrated board to stabilize the power supply voltage. The capacitor is preferably a large capacitor, such as a capacitor with a capacitance exceeding 100uF, for example, a 470uF capacitor. The control system of the device may also include a wired controller, to which the main drive integrated board is connected. For example, Figure 2 A schematic diagram of the control system is shown. The device is, for example, an air conditioning fan coil unit. The control system for the fan coil unit includes: a main drive integrated board and a wired controller. The main drive integrated board integrates a fan drive module and a main control module. The main drive integrated board is used to control the fan operation, collect sensor signals, and control related loads.

[0047] Figure 5 This is a structural block diagram of an embodiment of the bus voltage detection device provided by the present invention. Figure 5 As shown, the bus voltage detection device 100 includes a judgment unit 110 and a determination unit 120.

[0048] The judgment unit 110 is used to determine whether the rate of decrease of the bus voltage is greater than a preset threshold when the bus voltage of the main drive integrated board is detected to be lower than a preset low voltage protection setting value.

[0049] In the event of a power outage, the bus voltage will slowly decrease, and the main drive integrated board can still operate for a period of time. The main drive integrated board is equipped with a bus voltage sampling circuit to monitor the bus voltage in real time. For example, this circuit acquires the voltage signal through a high-speed ADC (analog-to-digital converter), which is then processed by the control chip. When the bus voltage is detected to be lower than a preset low-voltage protection setting, it further determines whether the rate of decrease of the bus voltage exceeds a set threshold.

[0050] The determining unit 120 is configured to determine that the device is in a power-off state if the determining unit determines that the rate of decrease of the bus voltage is greater than a set threshold; and to determine that the device is in a power supply abnormality if the determining unit determines that the rate of decrease of the bus voltage is less than or equal to the set threshold.

[0051] Specifically, in the event of a power outage, the bus voltage will drop slowly, and the main drive integrated board can still operate for a period of time. Therefore, if the rate of decrease of the bus voltage is greater than a set threshold, it is determined to be a power outage state, and no fault alarm is triggered; if the rate of decrease of the bus voltage is less than or equal to the set threshold, it is determined that the equipment is supplying abnormally, and a fault alarm is triggered.

[0052] According to the above embodiments of the present invention, when the bus voltage is detected to be lower than the preset low voltage protection setting value, the voltage drop is determined by the attenuation rate (drop rate) of the bus voltage to determine whether the voltage drop is caused by a power outage or an abnormal power supply, thereby deciding whether to report a fault and avoiding false fault reports.

[0053] Figure 6 This is a structural block diagram of another embodiment of the bus voltage detection device provided by the present invention. (See diagram below.) Figure 6 As shown, the bus voltage detection device 100 also includes a display unit 140.

[0054] The display unit 140 is configured to, after the determination unit 120 determines that the power supply of the device is abnormal, not display fault information if the bus voltage returns to normal within a set time; and display fault information if the bus voltage does not return to normal within the set time.

[0055] For example, upon detecting an abnormal bus voltage, a fault is recorded, a timer is started, and the voltage status is continuously monitored. If the voltage returns to normal within a set time (e.g., 200 seconds), no fault is displayed; if the voltage remains abnormal for longer than the set time, fault information is displayed. Specifically, the fault information can be sent to the wired controller for display. The main drive integrated board transmits the fault information to the wired controller via a communication bus (e.g., homebus). The wired controller displays the corresponding fault information according to the main control command and allows the user to perform a reset operation.

[0056] According to the above embodiments of the present invention, a fault delay display mechanism is adopted. After detecting an abnormal bus voltage, the fault is displayed only after the abnormal voltage has lasted for a period of time. On the one hand, this can avoid false alarms caused by voltage fluctuations. On the other hand, it can ensure that the main drive integrated board's power is consumed within a set time in the event of a power outage due to an abnormal bus voltage, so that there is no possibility of false alarms.

[0057] Optionally, based on any of the above embodiments, the device 100 further includes: a locking unit (not shown), used to trigger a unit locking operation when the number of times the power supply of the device is determined to be abnormal within a preset time exceeds a set number.

[0058] If the number of times the power supply failure of the equipment is detected exceeds a set number within a preset time period, the unit lockout operation is triggered. If the number of times the power supply failure of the equipment is detected does not exceed the set number within the preset time period, the unit lockout operation is not triggered.

[0059] Specifically, the system records the number of power supply anomalies within a preset time period (e.g., 1 hour). If the number of anomalies within this time window does not exceed a set number (e.g., 6 times), the unit will not be locked. If the set number is exceeded, the unit locking mechanism is triggered to prevent frequent anomalies from damaging the system. Once the unit is locked, the user cannot adjust the unit's operating parameters. For example, the main control module of the main drive integrated board sends a fan stop command to the fan drive module, keeping the fan in a stopped state. Even if the user adjusts the fan speed, it will be ineffective; the fan will only return to normal operation after the fault is manually cleared.

[0060] According to the above embodiments of the present invention, when the cumulative number of faults reaches a set number, a unit locking mechanism is triggered to prevent frequent anomalies from damaging the system.

[0061] The present invention also provides a storage medium corresponding to the bus voltage detection method of the device, wherein a computer program is stored thereon, which, when executed by a processor, implements the steps of any of the aforementioned methods.

[0062] The present invention also provides an apparatus corresponding to the bus voltage detection method of the device, comprising a processor, a memory, and a computer program stored in the memory that can run on the processor, wherein the processor executes the program to implement the steps of any of the aforementioned methods.

[0063] The present invention also provides an apparatus corresponding to the bus voltage detection device of the aforementioned equipment, including the bus voltage detection device of any of the aforementioned equipment.

[0064] The present invention also provides a computer program product corresponding to the bus voltage detection method of the device, comprising a computer program that, when executed by a processor, implements the steps of any of the aforementioned methods.

[0065] Accordingly, the solution provided by the present invention uses the bus voltage attenuation change rate to distinguish between power outages and power supply anomalies, avoiding false fault reports; it sets a delayed fault display mechanism, only reporting a fault after the voltage anomaly has lasted for a period of time; and it adopts a non-immediate locking mechanism, locking the unit operation only when the number of faults exceeds a set value within a unit time.

[0066] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0067] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0068] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0069] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to related technologies, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0070] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A bus voltage detection method of an apparatus, characterized by, The control system of the device comprises a main drive integrated board which integrates a drive module and a main control module, and the bus voltage detection method comprises: When it is detected that the bus voltage of the main drive integrated board is lower than a preset low-voltage protection setting value, it is judged whether the falling rate of the bus voltage is greater than a set threshold value; If it is judged that the falling rate of the bus voltage is greater than the set threshold value, it is determined that the device is in a power-off state; If it is judged that the falling rate of the bus voltage is less than or equal to the set threshold value, it is determined that the device has a power supply abnormality.

2. The method of claim 1, wherein, Further comprising: After it is determined that the device has a power supply abnormality, if the bus voltage returns to normal within a set time, no fault information is displayed; If the bus voltage does not return to normal within the set time, fault information is displayed.

3. The method of claim 1, wherein, The control system of the device further comprises a drive-by-wire controller; Displaying the fault information comprises sending the fault information to the drive-by-wire controller so as to display the fault information on the drive-by-wire controller.

4. The method according to claim 1 or 2, characterized in that, Further comprising: When it is determined that the device has a power supply abnormality for more than a set number of times within a preset time, a unit locking operation is triggered.

5. The method according to claim 1 or 2, characterized in that, The device is an air conditioner fan coil, and the main drive integrated board integrates a fan drive module and a main control module. The control system of the device comprises a main drive integrated board which integrates a drive module and a main control module, and the bus voltage detection device comprises:

6. A bus voltage detecting device of an apparatus, characterized by comprising: A judging unit is configured to, when it is detected that the bus voltage of the main drive integrated board is lower than a preset low-voltage protection setting value, judge whether the falling rate of the bus voltage is greater than a set threshold value; A determining unit is configured to, if the judging unit judges that the falling rate of the bus voltage is greater than the set threshold value, determine that the device is in a power-off state, and if the judging unit judges that the falling rate of the bus voltage is less than or equal to the set threshold value, determine that the device has a power supply abnormality. Further comprising:

7. The apparatus of claim 6, wherein, A displaying unit is configured to, after the determining unit determines that the device has a power supply abnormality, if the bus voltage returns to normal within a set time, not display fault information, and if the bus voltage does not return to normal within the set time, display fault information. A computer program is stored thereon, and the program is executed by a processor to implement the steps of the method of any one of claims 1-5. A processor, a memory, and a computer program stored on the memory and executable on the processor are included, and the processor implements the steps of the method of any one of claims 1-5 when executing the program, or the bus voltage detection device of any one of claims 6-7 is included.

8. A storage medium, characterized by A computer program is included, and the computer program is executed by a processor to implement the steps of the method of any one of claims 1-5.

9. An apparatus, comprising: ​ 10. A computer program product, characterised in that, ​

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