Solenoid valve hot standby redundant power supply system

Abstract

The invention discloses an electromagnetic valve hot standby redundant power supply system, relates to the technical field of electromagnetic valve power supply, and can timely cut off a faulty power supply unit at the first time and start the hot standby redundant power supply system when the power supply system is abnormal, and the hot standby redundant power supply system can timely and effectively relay to undertake the driving function of an electromagnetic valve. Meanwhile, the self-adaptive power supply capability of the power supply system can be greatly improved, and the system can be adjusted to the optimal power supply scheme according to the monitoring condition no matter under a dual-power supply system, a single-power supply system or a one-good one-bad power supply system. Besides, under the condition that the system can continue to operate normally, fault parts are removed, the problem that the system stops operating due to traditional troubleshooting is greatly solved, and economic losses caused by the problem are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of solenoid valve power supply, and in particular to a solenoid valve hot standby redundant power supply system. Background Art

[0002] The solenoid valve is an inductive element, and its valve head is usually wound with copper wire. When the power is supplied to the solenoid valve, a magnetic field is first established at the two poles of the coil of the solenoid valve head. In order to shorten the time to establish the magnetic field, a larger power supply is usually applied to the solenoid valve. When the magnetic field is established, the solenoid valve is in an activated state, and only a small current is needed to make the solenoid valve work normally.

[0003] Figure 5 In the figure, Imax is the solenoid valve activation current value, Imin is the solenoid valve holding current value, t1~t2 is the activation current establishment time, t2~t3 is the solenoid valve activation time, t3~t4 is the conversion time from the activation state to the holding state, t4~tn0 is the solenoid valve holding time, and tn1~tn2 is the solenoid valve closing time.

[0004] from Figure 5 It can be seen that if the value of the solenoid valve activation current is smaller, the time it takes for the solenoid valve to establish the operating magnetic field will be shorter. When the solenoid valve activation current is small to a certain extent, the corresponding working magnetic field cannot be successfully constructed, and the solenoid valve will not be successfully activated. The unactivated solenoid valve cannot work normally. In summary, the factors affecting the normal operation of the solenoid valve are the size of the driving current of the solenoid valve power supply system and whether the current of the normally working solenoid valve power supply system can be stably output. It can be seen that the solenoid valve power supply system plays a significant role in whether the solenoid valve can work normally.

[0005] The solenoid valve power supply system is prone to failure due to device aging, electrical stress or extreme environmental conditions. Once the solenoid valve power supply system encounters the above abnormal conditions, it will directly lead to the solenoid valve being unable to complete the specified action normally. Human intervention is required to locate the problem point, remove the faulty power supply system and replace it to solve the above problem.

[0006] For existing control systems including solenoid valves, the above problems are mainly dealt with in the following ways.

[0007] The first is to improve the reliability requirements of the power supply system so that the power supply system can be problem-free for a long time, even in the entire use cycle of the system; the second is to add a monitoring circuit to the power supply line of the solenoid valve so that the problem point can be quickly located in the problem location link, which can save time for problem investigation to a certain extent; the third is to miniaturize and modularize the power supply system so that the system can be quickly restored and run by replacing the power supply module in the system recovery link. However, the above three treatment methods will inevitably cause the system to stop running when the system really encounters a power supply failure.

[0008] For large control systems, once actuators such as solenoid valves fail due to power supply system problems, the normal operation of the entire system will be affected, and the system will be forced to stop working. It will take a lot of manpower and time to locate, analyze and solve the problem of the power supply system. Only when the problem is truly solved can the power supply system resume operation, and then the entire control system can resume operation. For large control systems in scenarios such as nuclear power plants, the cost of restarting after shutdown is too high.

[0009] Therefore, how to ensure that the entire control system can operate normally after a fault occurs in the solenoid valve power supply system is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0010] In view of the above problems, the present invention provides a solenoid valve hot standby redundant power supply system for overcoming the above problems or at least partially solving the above problems, thereby solving the problem that the solenoid valve power supply system needs to be shut down for manual inspection and maintenance under abnormal conditions.

[0011] The present invention provides the following scheme:

[0012] A solenoid valve hot standby redundant power supply system, comprising:

[0013] An initial power supply system and a hot standby power supply system; both the initial power supply system and the hot standby power supply system can independently provide power for at least one identical solenoid valve in the same control system;

[0014] A pair of configuration bit signals are configured between the initial power supply system and the hot standby power supply system. The configuration bit signals of the initial power supply system and the hot standby power supply system are pulled up to the power supply of the main controller through resistors on their own boards, and are respectively led out, and configured to be short-circuited to the ground by driving transistors in the other power supply system, so that the initial power supply system and the hot standby power supply system can clearly define their main and standby roles in the power supply system;

[0015] The initial power supply system and the hot standby power supply system are each configured with a power supply monitoring circuit including a sampling resistor on their respective power supply output paths, and each is configured with its own status detection circuit. The power supply monitoring circuit and the own status detection circuit are used to monitor their respective power supply conditions in real time, so as to convert the hot standby redundant power supply system into the main power supply for the solenoid valve after determining that a fault exists in the initial power supply system.

[0016] Preferably: the main controller of the initial power supply system outputs a high-level control signal B, and the main controller of the hot standby power supply system outputs a high-level control signal A, and the configuration bit signals received by the initial power supply system and the hot standby power supply system are respectively low-level, so that the initial power supply system can normally output the specified solenoid valve drive power supply, and the hot standby power supply system is in a hot standby state.

[0017] Preferably: when the initial power supply system detects that the output solenoid valve drive power supply is abnormal, the level state of the configuration bit signal is changed to inform the hot standby power supply system of the abnormal situation of the initial power supply system; after receiving the change of the configuration bit signal, the main controller of the hot standby power supply system cuts off the power supply path of the initial power supply system and turns on its own power supply output path.

[0018] Preferably: when the initial power supply system discovers that its own operation is abnormal through the self-inspection of its own status detection circuit or discovers that the output power supply is abnormal by monitoring the voltage difference across the sampling resistor, the control signal B is set low so that the configuration bit signal B collected by the main controller of the hot standby power supply system is in a high level state, so that the hot standby power supply system knows that the initial power supply system is no longer suitable to continue to provide the corresponding power supply for the solenoid valve.

[0019] Preferably: when the initial power supply system finds that its own operation is abnormal through the self-inspection of the self-state detection circuit or finds that the output power supply is abnormal by monitoring the voltage difference across the sampling resistor, the main controller of the initial power supply system will output a low-level switching signal 2 to shut down the original power supply link.

[0020] Preferably: after determining that there is a fault in the initial power supply system, the main controller of the hot standby power supply system controls the first switch MOS tube of the initial power supply system on the solenoid valve power supply path to be turned off, and controls the third switch MOS tube and the fourth switch MOS tube of the hot standby power supply system to be turned on to introduce the power supply of the hot standby power supply system into the solenoid valve power supply path.

[0021] Preferably: after the hot standby power supply system learns that the initial power supply system has failed, the main controller of the hot standby power supply system outputs a high-level switch signal 1 to ensure that the first switch MOS tube of the power supply link of the initial power supply system is effectively cut off; at the same time, the switch signal 3 and the switch signal 4, which are originally at a low level, are set high to make the third switch MOS tube and the fourth switch MOS tube conductive, so as to complete the transfer of the main power supply from the initial power supply system to the hot standby power supply system.

[0022] Preferably: the initial power supply system includes at least one initial power supply unit, and the hot standby power supply system includes at least one hot standby power supply unit corresponding one-to-one to at least one initial power supply unit, and the corresponding initial power supply unit and the hot standby power supply unit can independently provide power for at least one identical solenoid valve in the same control system.

[0023] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0024] The embodiment of the present application provides a solenoid valve hot standby redundant power supply system, which can cut off the faulty power supply unit in time and start the hot standby redundant power supply system in the first time when the power supply system is abnormal. The hot standby redundant power supply system can promptly and effectively take over the driving function of the solenoid valve. At the same time, it can greatly improve the adaptive power supply capability of the power supply system. Regardless of whether it is a dual power supply system, a single power supply system, or a one-good-one-bad power supply system, the system can adjust to the optimal power supply plan according to the monitoring situation. In addition, the faulty part can be removed while the system can continue to operate normally, which greatly reduces the problem of the system stopping operation due to traditional troubleshooting and reduces the economic losses caused by it.

[0025] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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 are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a connection block diagram of a solenoid valve hot standby redundant power supply system provided by an embodiment of the present invention;

[0028] Figure 2 is a schematic diagram of configuration bit signal connections provided by an embodiment of the present invention;

[0029] Figure 3is a control principle block diagram provided by an embodiment of the present invention;

[0030] Figure 4 is a schematic diagram of a control circuit provided by an embodiment of the present invention;

[0031] Figure 5 1 is a solenoid valve driving current waveform diagram provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0033] See also Figure 1 , is a solenoid valve hot standby redundant power supply system provided by an embodiment of the present invention, such as Figure 1 As shown, the system may include:

[0034] An initial power supply system and a hot standby power supply system; both the initial power supply system and the hot standby power supply system can independently provide power for at least one identical solenoid valve in the same control system;

[0035] A pair of configuration bit signals are configured between the initial power supply system and the hot standby power supply system. The configuration bit signals of the initial power supply system and the hot standby power supply system are pulled up to the power supply of the main controller through resistors on their own boards, and are respectively led out, and configured to be short-circuited to the ground by driving transistors in the other power supply system, so that the initial power supply system and the hot standby power supply system can clearly define their main and standby roles in the power supply system;

[0036] The initial power supply system and the hot standby power supply system are each configured with a power supply monitoring circuit including a sampling resistor on their respective power supply output paths, and each is configured with its own status detection circuit. The power supply monitoring circuit and the own status detection circuit are used to monitor their respective power supply conditions in real time, so as to convert the hot standby redundant power supply system into the main power supply for the solenoid valve after determining that a fault exists in the initial power supply system.

[0037] The solenoid valve hot standby redundant power supply system provided in the embodiment of the present application can effectively cut off the original faulty power supply system through the hot standby redundant power supply technology provided in the embodiment of the present application when the solenoid valve power supply system works abnormally, and automatically connect to the hot standby power supply system so that the system can still maintain normal operation. At this time, human intervention is used to troubleshoot the abnormal problem and update and replace the abnormal power supply module, which can ensure that the system is in a normal operation state during the entire processing process.

[0038] When the power supply unit of the system works abnormally, the system can immediately cut off the faulty power supply unit and start the hot standby redundant power supply system. The hot standby redundant power supply system can promptly and effectively take over the driving function of the solenoid valve. At this time, the hot standby redundant power supply system becomes the main power supply for the solenoid valve, so that the system can continue to work unaffected. During this period, since the faulty power supply system has been cut off by the system, human intervention can be used to directly remove the faulty power supply system and replace it with a new one. In this way, the power supply abnormality problem can be easily solved while the system remains in normal operation.

[0039] In order to smoothly sense the abnormality of the initial power supply system and ensure that the faulty power supply system can be cut off, the embodiment of the present application can also provide that the main controller of the initial power supply system outputs a high-level control signal B, and the main controller of the hot standby power supply system outputs a high-level control signal A, and the configuration bit signals received by the initial power supply system and the hot standby power supply system are respectively low-level, so that the initial power supply system can normally output the specified solenoid valve drive power supply, and the hot standby power supply system is in a hot standby state.

[0040] Furthermore, when the initial power supply system detects that the output solenoid valve drive power supply is abnormal, the level state of the configuration bit signal is changed to inform the hot standby power supply system of the abnormal situation of the initial power supply system; after receiving the change of the configuration bit signal, the main controller of the hot standby power supply system cuts off the power supply path of the initial power supply system and turns on its own power supply output path.

[0041] When the initial power supply system discovers that its own operation is abnormal through the self-inspection of its own status detection circuit or discovers that the output power supply is abnormal by monitoring the voltage difference across the sampling resistor, the control signal B is set low so that the configuration bit signal B collected by the main controller of the hot standby power supply system is in a high level state, so that the hot standby power supply system knows that the initial power supply system is no longer suitable to continue to provide the corresponding power supply for the solenoid valve.

[0042] In order to ensure that the initial power supply system can be cut off, the embodiment of the present application can also provide that when the initial power supply system discovers that its own operation is abnormal through the self-inspection of its own status detection circuit or discovers that the output power supply is abnormal by monitoring the voltage difference across the sampling resistor, the main controller of the initial power supply system will output a low-level switching signal 2 to shut down the original power supply link.

[0043] In order to facilitate the disconnection of the initial power supply system and the connection of the hot standby power supply system, the embodiment of the present application can provide that after determining that the initial power supply system has a fault, the main controller of the hot standby power supply system controls the first switch MOS tube of the initial power supply system on the solenoid valve power supply path to be turned off, and controls the third switch MOS tube and the fourth switch MOS tube of the hot standby power supply system to be turned on to introduce the power supply of the hot standby power supply system into the solenoid valve power supply path.

[0044] In order to achieve mutual control and mutual restraint to ensure accurate disconnection and connection, the embodiment of the present application can also provide that after the hot standby power supply system learns that the initial power supply system has failed, the main controller of the hot standby power supply system outputs a high-level switch signal 1 to ensure that the first switch MOS tube of the power supply link of the initial power supply system is effectively disconnected; at the same time, the switch signal 3 and the switch signal 4, which are originally at a low level, are set high to make the third switch MOS tube and the fourth switch MOS tube conductive, so as to complete the transfer of the main power supply from the initial power supply system to the hot standby power supply system.

[0045] It can be understood that when the power supply system provided in the embodiment of the present application is used, all the solenoid valve power supply systems contained in the entire production system can be easily configured for hot standby. Since in actual use, a part of the solenoid valve power supply system may fail and need maintenance, while the remaining solenoid valves can operate normally under the power supply of the initial power supply system, in order to reduce the switching operation cost, the embodiment of the present application can also provide that the initial power supply system includes at least one initial power supply unit, and the hot standby power supply system includes at least one hot standby power supply unit corresponding to at least one of the initial power supply units, and the corresponding initial power supply unit and the hot standby power supply unit can independently provide power for at least one identical solenoid valve in the same control system.

[0046] The system of the embodiment of the present application can be set up in a unitized manner, and each unit is used to control a part of the solenoid valves. When a power supply system of the solenoid valve corresponding to a certain unit fails, the initial power supply system corresponding to the unit can be cut off, and the power supply unit of the corresponding hot standby power supply system can be connected.

[0047] The solenoid valve hot standby redundant power supply system provided in the embodiment of the present application is introduced in detail below.

[0048] The power supply system provided in this application is mainly implemented by an initial power supply system and a hot standby redundant power supply system.

[0049] First, the initial power supply system and the hot standby power supply system can independently provide power to the solenoid valve under normal circumstances.

[0050] Secondly, a pair of configuration bit signals are designed between the initial power supply system and the hot standby power supply system so that the two power supply systems can clearly define their roles in the power supply system so as to run the normal power supply program or the hot standby power supply program accordingly.

[0051] Third, the power output paths of the two power supply systems are designed with power supply monitoring circuits including sampling resistors, which can monitor the power supply conditions in real time.

[0052] Under normal circumstances, both the initial power supply system and the hot standby power supply system can independently provide power for the solenoid valve. In other words, in terms of output power characteristics, both the initial power supply system and the hot standby power supply system are power supply systems that can independently provide effective driving power for the solenoid valve. There is no obvious difference between the two in terms of output power characteristics. It is just that due to different configurations, the roles they play in the system are different, which leads to one being the main power supply under normal power supply conditions and the other being the main power supply under abnormal power supply conditions.

[0053] A series of control signals for mutual control and mutual restriction are designed between the initial power supply system and the hot standby power supply system. In the two systems, the respective configuration bit signals are pulled up to the power supply of the main controller through resistors on their own boards, and then led out separately. In the other power supply system, the transistors are driven to short-circuit them to the ground to realize mutual confirmation of the status of both parties. The connection diagram is shown in the figure below. Figure 2 shown.

[0054] In order to facilitate the understanding of the system provided by the present application, the following introduction is made by comparing a separate initial power supply system, a separate equipment hot standby power supply system, and a simultaneous initial power supply system and a hot standby power supply system as adopted by the present application.

[0055] Working scenario 1: When only the initial power supply system is installed in the system, the control signal A originally coming from the hot standby power supply system is grounded through a pull-down resistor, which is equivalent to a low level, so that the configuration bit signal A maintains a high level DVDD. The main controller of the initial power supply system believes that it is the only power supply system in the system and outputs the specified solenoid valve drive power normally as required.

[0056] Working scenario 2: When only the hot standby power supply system is installed in the system, the control signal B originally coming from the initial power supply system is grounded through a pull-down resistor, which is equivalent to a low level, so that the configuration bit signal B maintains a high level DVDD. The main controller of the hot standby power supply system believes that it is the only power supply system in the system and outputs the specified solenoid valve drive power normally as required.

[0057] Working scenario three: When both the initial power supply system and the hot standby power supply system are installed in the system, the main controller of the initial power supply system will output a high-level control signal B, and at the same time, the main controller of the hot standby power supply system will output a high-level control signal A. The configuration bit signals received by both are low-level. As required, the initial power supply system normally outputs the specified solenoid valve drive power, while the hot standby power supply system is in hot standby state, waiting for the initial power supply system to fail before switching to the main power supply system to output the specified solenoid valve drive power.

[0058] The power output paths of the two power supply systems are designed with power supply monitoring circuits including sampling resistors, which can monitor the power supply situation in real time. This part of the circuit is mainly used as the most direct criterion for determining whether the output solenoid valve drive power supply is abnormal. On the one hand, when the initial power supply system detects that the output solenoid valve drive power supply is abnormal, the abnormal situation of the initial power supply system is notified to the hot standby power supply system by changing the level state of the configuration bit signal, so that the hot standby power supply system can be used as the main power supply. After receiving the signal change, the main controller of the hot standby power supply system will immediately cut off the power supply path of the original initial power supply system and turn on its own power supply output path; on the other hand, in order to avoid the failure of the initial power supply system to be notified to the hot standby power supply system due to the signal interaction failure of the two systems or the damage of the main controller of the initial power supply system, the hot standby power supply system will immediately cut off the power supply path of the original initial power supply system and turn on its own power supply output path when it detects that the output solenoid valve drive power supply is abnormal.

[0059] Table 1 Control circuit signal type table

[0060]

[0061]

[0062] Whether the initial power supply system actively transmits the power supply anomaly to the hot standby power supply system through its own status detection or by monitoring the voltage difference between the two ends of the sampling resistor on the solenoid valve power supply path, or the hot standby power supply system monitors the voltage difference between the two ends of the sampling resistor on the solenoid valve power supply path and then learns that the initial power supply system is abnormal. Ultimately, the hot standby power supply system can control the control circuit on the solenoid valve power supply path to turn off the switch MOS tube 1 (the first switch MOS tube), and introduce the power supply of the hot standby power supply system into the solenoid valve power supply path by controlling the switch MOS tube 3 (the third switch MOS tube) and the switch MOS tube 4 (the fourth switch MOS tube). The control principle is as follows: Figure 3 shown.

[0063] When the system is operating normally, the switch signal 1 from the hot standby power supply system defaults to a low output level, so that the switch MOS tube 1 (the first switch MOS tube) of the initial power supply system is fully turned on under the control of the switch signal a, so that the driving voltage source can apply power to the solenoid valve, and then the output power current is converted to a high level by the digital-to-analog conversion circuit, the constant current control circuit, the constant current MOS tube and other circuits in the initial power supply system. Figure 1 The waveform shown is output externally, and the initial power supply system outputs a high-level switch signal 2 only after passing the self-test, so that the entire power supply link can be turned on to complete the task of the initial power supply system to provide a given drive current power supply to the solenoid valve.

[0064] When the initial power supply system finds that it is operating abnormally through self-test or the output power is abnormal through monitoring the voltage difference between the two ends of the sampling resistor, Figure 2 The control signal B shown is set low so that the configuration bit signal B collected by the main controller of the hot standby power supply system is in a high level state, so that the hot standby power supply system knows that the initial power supply system is no longer suitable to continue to provide the corresponding power supply for the solenoid valve, and in order to avoid malfunction of the solenoid valve, the main controller of the initial power supply system will immediately output a low-level switch signal 2 to shut down the original power supply link.

[0065] On the other hand, after the hot standby power supply system learns of the failure of the initial power supply system, its main controller outputs a high-level switch signal 1 to ensure that the power supply link of the initial power supply system is effectively cut off. At the same time, the switch signal 3 and the switch signal 4, which are originally at a low level, are set high to complete the transfer of the main power supply from the initial power supply system to the hot standby power supply system.

[0066] In addition, in order to enable the initial power supply system to supply power independently and the hot standby power supply system to effectively control and disconnect the power supply link of the initial power supply system under abnormal circumstances, the following control circuit is designed.

[0067] like Figure 4As shown, when only the initial power supply system is installed in the system, the switch signal 1 is at a low level, and the initial power supply system controls the switch MOS tube 1 (the first switch MOS tube) to be turned on by outputting the switch signal a as a high level, so that the driving voltage source can act smoothly on the solenoid valve; when the initial power supply system fails, the switch signal a may still be able to output a high level due to problems in the internal circuit of the initial power supply system, and the hot standby power supply system, when the failure of the initial power supply system is known, controls the switch MOS tube 1 (the first switch MOS tube) to be turned off by outputting the switch signal 1 as a high level, thereby effectively cutting off the power supply link of the initial power supply system.

[0068] The system provided in the present application introduces bidirectional handshake control signals and configuration bit signals of the initial power supply system and the hot standby power supply system, and the two interact with each other to obtain the optimal power supply solution.

[0069] The introduction of multi-level monitoring realizes multi-level confirmation of the operating status of the power supply system. On the one hand, by monitoring the current flowing through the load, it can be judged whether the power supply is normal. On the other hand, the control signal and configuration bit signal between the two power supply systems can also be used to judge whether the power supply is abnormal.

[0070] The power supply operation and system monitoring operation are independent. The initial power supply system has the highest priority for power supply operation, and the hot standby power supply system has the highest priority for system monitoring operation. Under normal power supply conditions, the initial power supply system is given priority, but under abnormal power supply conditions, the hot standby power supply system takes the lead in related power supply operations.

[0071] A control circuit is introduced to realize power supply in normal situations and power cut-off in abnormal situations, and finally realize the effective conversion between the initial power supply system and the hot standby power supply system.

[0072] To summarize, the system provided by the present application can enable the entire power solenoid valve control system to operate normally and output undistorted driving current when driven, and can also achieve double insurance by disconnecting the switching MOS tube in the driving path and turning off the output voltage of the high-voltage driving power supply in two ways when the power is off, so that the power supply of the power solenoid valve can be safely and effectively disconnected.

[0073] In summary, the hot standby redundant power supply system for solenoid valves provided by the present application can cut off the faulty power supply unit in time and start the hot standby redundant power supply system in the first place when the power supply system is abnormal. The hot standby redundant power supply system can promptly and effectively take over the driving function of the solenoid valve. At the same time, it can greatly improve the adaptive power supply capability of the power supply system. Regardless of whether it is a dual power supply system, a single power supply system, or a one-good-one-bad power supply system, the system can adjust to the optimal power supply plan according to the monitoring situation. In addition, the faulty part can be removed while the system can continue to operate normally, which greatly reduces the problem of the system stopping operation due to traditional troubleshooting and reduces the economic losses caused thereby.

[0074] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0075] It can be known from the description of the above implementation methods that those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present application or certain parts of the embodiments.

[0076] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A solenoid valve hot standby redundant power supply system, characterized in that: It includes an initial power supply system and a hot standby power supply system; both the initial power supply system and the hot standby power supply system can independently provide power for at least one identical solenoid valve in the same control system; A pair of configuration bit signals are configured between the initial power supply system and the hot standby power supply system. The configuration bit signals of the initial power supply system and the hot standby power supply system are pulled up to the power supply of the main controller through resistors on their own boards, and are respectively led out, and configured to be short-circuited to the ground by driving transistors in the other power supply system, so that the initial power supply system and the hot standby power supply system can clearly define their main and standby roles in the power supply system; The initial power supply system and the hot standby power supply system are each configured with a power supply monitoring circuit including a sampling resistor on their respective power supply output paths, and each is configured with its own status detection circuit. The power supply monitoring circuit and the own status detection circuit are used to monitor their respective power supply conditions in real time, so as to convert the hot standby redundant power supply system into the main power supply for the solenoid valve after determining that a fault exists in the initial power supply system.

2. The solenoid valve hot standby redundant power supply system according to claim 1, characterized in that: The main controller of the initial power supply system outputs a high-level control signal B, and the main controller of the hot standby power supply system outputs a high-level control signal A. The configuration bit signals received by the initial power supply system and the hot standby power supply system are both low-level, so that the initial power supply system can normally output the specified solenoid valve drive power supply, and the hot standby power supply system is in a hot standby state.

3. The solenoid valve hot standby redundant power supply system according to claim 2, characterized in that: When the initial power supply system detects that the output solenoid valve drive power supply is abnormal, the level state of the configuration bit signal is changed to inform the hot standby power supply system of the abnormal situation of the initial power supply system; after receiving the change of the configuration bit signal, the main controller of the hot standby power supply system cuts off the power supply path of the initial power supply system and turns on its own power supply output path.

4. The solenoid valve hot standby redundant power supply system according to claim 3, characterized in that: When the initial power supply system discovers that its own operation is abnormal through the self-inspection of its own status detection circuit or discovers that the output power supply is abnormal by monitoring the voltage difference across the sampling resistor, the control signal B is set low so that the configuration bit signal B collected by the main controller of the hot standby power supply system is in a high level state, so that the hot standby power supply system knows that the initial power supply system is no longer suitable to continue to provide the corresponding power supply for the solenoid valve.

5. The solenoid valve hot standby redundant power supply system according to claim 4, characterized in that: When the initial power supply system finds that its own operation is abnormal through the self-inspection of its own status detection circuit or finds that the output power supply is abnormal by monitoring the voltage difference across the sampling resistor, the main controller of the initial power supply system will output a low-level switch signal 2 to shut down the original power supply link.

6. The solenoid valve hot standby redundant power supply system according to claim 1, characterized in that: After determining that there is a fault in the initial power supply system, the main controller of the hot standby power supply system controls the first switch MOS tube of the initial power supply system on the solenoid valve power supply path to be turned off, and controls the third switch MOS tube and the fourth switch MOS tube of the hot standby power supply system to be turned on to introduce the power supply of the hot standby power supply system into the solenoid valve power supply path.

7. The solenoid valve hot standby redundant power supply system according to claim 6, characterized in that: After the hot standby power supply system learns that the initial power supply system has failed, the main controller of the hot standby power supply system outputs a high-level switch signal 1 to ensure that the first switch MOS tube of the power supply link of the initial power supply system is effectively cut off; at the same time, the switch signal 3 and the switch signal 4, which are originally at a low level, are set high to make the third switch MOS tube and the fourth switch MOS tube conductive, so as to complete the transfer of the main power supply from the initial power supply system to the hot standby power supply system.

8. The solenoid valve hot standby redundant power supply system according to claim 1, characterized in that: The initial power supply system includes at least one initial power supply unit, and the hot standby power supply system includes at least one hot standby power supply unit corresponding to at least one of the initial power supply units. The corresponding initial power supply units and the hot standby power supply units can independently provide power for at least one identical solenoid valve in the same control system.

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