Aerator disconnection protection method and system

Abstract

The invention provides a disconnection protection method and system for an aerator, and relates to the technical field of disconnection protection, a three-phase line is connected with a positive electrode and a negative electrode of the aerator through a three-phase rectifier bridge, a phase line of each phase of the three-phase line is connected with a voltage detection circuit, and nodes are arranged in the voltage detection circuits. The voltage detection circuit is used for detecting the voltage to ground of the node, and the aerator disconnection protection method comprises the following steps: acquiring the voltage to ground, and determining the real-time input voltage of a phase line where the node corresponding to the voltage to ground is located; if it is detected that the real-time input voltage is lower than the preset input voltage, whether the duration when the real-time input voltage is lower than the preset input voltage exceeds the set duration or not is judged; and if the duration exceeds the set duration, determining that the phase line of the aerator is disconnected, and turning off the aerator with the disconnected phase line. According to the invention, the efficiency of broken line detection is improved, and the operation safety of the aerator is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breaker protection, and in particular to a circuit breaker protection method and system for an aerator. Background Art

[0002] The three-phase aerator is a device driven by a three-phase power supply. It is often used to oxygenate water to improve water quality and ecological environment. It is widely used in aquaculture, sewage treatment, ecological restoration of rivers and lakes and other fields.

[0003] When using a three-phase oxygenator, there are three input lines and they are pulled from the power supply position to the target oxygen supply position. The line is long, so it is necessary to perform a disconnection test on the line to ensure the normal power supply of the oxygenator.

[0004] In the prior art, the lines are usually inspected manually at regular intervals. This method generally takes a long time to inspect the lines and is inefficient. Summary of the invention

[0005] The problem to be solved by the present invention is how to improve the efficiency of disconnection detection.

[0006] In order to solve the above problems, in the first aspect, the present invention provides a method for protecting an aerator from line breakage, wherein a three-phase line is respectively connected to the positive and negative electrodes of the aerator through a three-phase rectifier bridge, and a voltage detection circuit is connected to each phase line of each phase in the three-phase line, and a node is provided in the voltage detection circuit, and the voltage detection circuit is used to detect the voltage of the node to the ground. The method for protecting an aerator from line breakage comprises: obtaining the voltage to the ground, and determining the real-time input voltage of the phase line where the node corresponding to the voltage to the ground is located; If it is detected that the real-time input voltage is lower than the preset input voltage, determining whether the duration for which the real-time input voltage is lower than the preset input voltage exceeds a set duration; If the duration exceeds the set duration, it is determined that a phase line of the aerator is disconnected, and the aerator with the phase line disconnected is shut down.

[0007] Optionally, the voltage detection circuit includes a diode, a plurality of first resistors and a second resistor connected in sequence, wherein the positive electrode of the diode has a common potential with the input end of the three-phase rectifier bridge, the node is arranged between the last of the plurality of first resistors in the current direction and the second resistor, the end of the second resistor away from the first resistor is grounded, the resistance value of the first resistor is at least one order of magnitude larger than the resistance value of the second resistor, and the node is connected to the AD pin of the single-chip computer.

[0008] Optionally, obtaining the voltage to ground includes: The voltage value corresponding to the voltage to ground is determined according to the maximum voltage corresponding to the voltage measurement range of the single chip microcomputer, the sampling display value corresponding to the maximum voltage, and the real-time sampling display value corresponding to the voltage to ground.

[0009] Optionally, determining the real-time input voltage of the phase line of the node corresponding to the voltage to ground includes: The real-time input voltage is determined according to the following formula: VAC1=Vin R39 / (R17+R23+R26+R32+R36+R39); Among them, VAC1 represents the voltage to ground, Vin represents the real-time input voltage, R39 represents the second resistor, and R17, R23, R26, R32 and R36 all represent the first resistor.

[0010] Optionally, each of the first resistors is 300KΩ, and each of the second resistors is 9.1KΩ.

[0011] Optionally, the preset input voltage is a voltage range, and the minimum value of the voltage range is 160V, and the set time length includes 40ms.

[0012] Optionally, if the duration exceeds the set duration, determining that a phase line of the aerator is disconnected includes: If it is detected that the real-time input voltage of the phase line of the node corresponding to the voltage to ground is lower than the preset input voltage for a period exceeding the set time, it is determined that the phase line of the corresponding node is disconnected.

[0013] Optionally, shutting down the aerator with a phase line disconnection includes: Obtain a shutdown confirmation instruction to remotely shut down the aerator.

[0014] Optionally, obtaining a shutdown confirmation instruction to remotely shut down the aerator includes: Determine the inspection points of multiple inspectors within a set period in the future according to the inspection plan; Sending a shutdown confirmation request based on the inspection point, wherein the shutdown confirmation request is used to request obtaining a confirmation instruction to shut down the aerator within a preset time period, and the preset time period is a floating preset duration based on the inspection punch-in time period in the inspection plan, and the preset time period does not exceed the future set time period; If the confirmation instruction is received within the preset time period, generating the closing confirmation instruction according to the identity information of the inspection personnel corresponding to the confirmation instruction; If the confirmation instruction is not received within the preset time period, the shutdown confirmation instruction is directly generated, and the directly generated shutdown confirmation instruction is used to shut down the aerator and start the backup oxygenation plan.

[0015] The present invention obtains the node's voltage to ground through a voltage detection circuit. Since the node's voltage to ground is associated with the phase voltage of each phase line, the real-time input voltage of the phase line where the node is located can be determined based on this. The real-time input voltage is then compared with the preset input voltage, and combined with the comparison of the set time length, it is determined that a reduction in the real-time input voltage is very likely to involve a phase line disconnection that is one of multiple related factors. Therefore, there is no need to manually detect the line section by section to determine whether the phase line is disconnected, thereby improving the efficiency of disconnection detection. After confirming that there is a risk of disconnection in the phase line, the aerator is further automatically shut down, which can prevent the aerator from being damaged due to burning out due to disconnection.

[0016] In the second aspect, the present invention further provides an aerator line break protection system, using the aerator line break protection method as described in any one of the above items, the three-phase line is respectively connected to the positive and negative poles of the aerator through a three-phase rectifier bridge, and each phase line of the three-phase line is connected to a voltage detection circuit, and a node is provided in the voltage detection circuit, and the voltage detection circuit is used to detect the voltage of the node to the ground. The aerator line break protection system includes: An acquisition and determination module, used to acquire the voltage to ground and determine the real-time input voltage of the phase line where the node corresponding to the voltage to ground is located; a detection module, for determining whether a duration for which the real-time input voltage is lower than the preset input voltage exceeds a set duration if it is detected that the real-time input voltage is lower than the preset input voltage; The shut-down module is used to determine that a phase line of the aerator is disconnected if the duration exceeds the set duration, and shut down the aerator with the phase line disconnected.

[0017] In a third aspect, the present invention provides an electronic device, including a memory and a processor; The memory is used to store computer programs; The processor is used to implement the aerator disconnection protection method as described in the first aspect when executing the computer program.

[0018] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the aerator line break protection method as described in the first aspect is implemented.

[0019] The aerator disconnection protection system, electronic device and computer-readable storage medium provided by the present invention have the same beneficial effects as the aerator disconnection protection method relative to the prior art, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic flow chart of a method for protecting an aerator from line breakage in an embodiment of the present invention is shown; Figure 2 A circuit diagram of a method for protecting an aerator from line breakage in an embodiment of the present invention is shown; Figure 3 A schematic diagram of the structure of the aerator disconnection protection system in an embodiment of the present invention is shown; Figure 4 A schematic diagram of the structure of an electronic device in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] It should be noted that, in the present invention, relational terms such as "first" and "second" 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.

[0023] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment" and "one implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in at least one embodiment or implementation of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0024] Reference Figure 1 and Figure 2As shown, an embodiment of the present invention proposes a method for protecting an aerator from line breakage, wherein three-phase lines (respectively L1, L2 and L3) are respectively connected to the positive and negative poles (+BUS and GND) of the aerator through a three-phase rectifier bridge B1, and a voltage detection circuit is connected to the phase line of each phase of the three-phase line, wherein a node is provided in the voltage detection circuit, and the voltage detection circuit is used to detect the ground voltage of the node. The node is located in the voltage detection circuit, and the voltage of the node is related to the phase voltage of the phase line of each phase. For a 380V three-phase power system, theoretically, the phase voltage of the phase line of each phase is 220V, and the line voltage is 380V. The method for protecting an aerator from line breakage comprises: S100: Acquire the voltage to ground, and determine the real-time input voltage of the phase line where the node corresponding to the voltage to ground is located.

[0025] Specifically, since the node is located in the voltage detection circuit, and there is a connection between the voltage of the node and the phase voltage of each phase line, based on this connection, the real-time input voltage of the phase line where the node is located can be determined by the real-time voltage to ground. The input voltage of the phase line of each phase reflects the working status of the three-phase power system, which shows the voltage level of each phase circuit.

[0026] S200: If it is detected that the real-time input voltage is lower than the preset input voltage, it is determined whether the time duration during which the real-time input voltage is lower than the preset input voltage exceeds a set time duration.

[0027] Specifically, the phase voltage of the phase line usually has a normal range rather than a static fixed value. This range can change under certain conditions and is affected by multiple factors such as the on-off conditions of the phase line and the supply environment conditions. Under normal circumstances, other conditions are kept stable and phase line disconnection will have a greater impact on the phase voltage of the phase line. Therefore, if it is detected that the real-time input voltage is lower than the preset input voltage, it means that the phase voltage of the phase line is affected by at least one factor, which may include the factor of phase line on-off, and further judgment needs to be made based on the duration.

[0028] S300: If the duration exceeds the set duration, it is determined that a phase line of the aerator is disconnected, and the aerator with the phase line disconnected is turned off.

[0029] Specifically, in the case of low voltage, if it is caused by supply environment conditions, etc., the real-time input voltage will most likely not remain low, but will occasionally be within the normal phase voltage range. Therefore, if the real-time input voltage is lower than the preset input voltage for too long, it can be preliminarily judged that the aerator may be at risk of phase line disconnection. At this time, the aerator at risk of failure will be shut down, for example, by automatically disconnecting the power supply through a relay or circuit breaker to ensure that it will not continue to run, thereby preventing the aerator from being damaged due to motor burning.

[0030] When this embodiment is applied in practice, the node's voltage to ground is obtained through a voltage detection circuit. Since the node's voltage to ground is associated with the phase voltage of each phase line, the real-time input voltage of the phase line where the node is located can be determined based on this. The real-time input voltage is then compared with the preset input voltage, and combined with the comparison of the set time, it is determined that the reduction in real-time input voltage is very likely to involve a phase line disconnection that is one of multiple related factors. Therefore, there is no need to manually detect the line section by section to determine whether the phase line is disconnected, which improves the efficiency of line break detection. After confirming that there is a risk of phase line disconnection, the aerator is further automatically shut down to prevent the aerator from being damaged due to burn-out.

[0031] The present invention not only improves the operating safety of the aerator through automatic disconnection judgment and monitoring, but also improves the intelligence and maintainability of the machine during the oxygenation process.

[0032] See also Figure 2 As an optional embodiment of the present invention, taking the detection of the L1 phase line as an example, the voltage detection circuit includes a diode (including D3), a plurality of first resistors (including R17, R23, R26, R32 and R36) and a second resistor R39 connected in sequence, wherein the positive electrode of the diode D5 has a common potential with the input end of the three-phase rectifier bridge B1, the node is set between the last first resistor R36 and the second resistor R39 in the current direction among the plurality of first resistors (including R17, R23, R26, R32 and R36), one end of the second resistor R39 away from the first resistor (including R17, R23, R26, R32 and R36) is grounded, the resistance of the first resistor (including R17, R23, R26, R32 and R36) is at least one order of magnitude greater than the resistance of the second resistor R39, and the node is connected to the AD pin (voltage measurement pin) of the single-chip computer.

[0033] For example, in Figure 2 In the example, for the detection of the L1 phase line, the first resistors are: R17, R23, R26, R32, R36, and the second resistor is R39; for the detection of the L2 phase line, the first resistors are: R15, R21, R25, R31, R35, and the second resistor is R38; for the detection of the L3 phase line, the first resistors are: R14, R18, R24, R29, R34, and the second resistor is R37. The models of the diodes (including D3, D4, and D5) include US1Q.

[0034] When this embodiment is applied in practice, the use of the diode D5 provides effective overvoltage protection to avoid voltage damage to the single-chip microcomputer. Since the circuit design ensures that the voltage is within the allowable range, the single-chip microcomputer can accurately monitor and process voltage changes, and through appropriate selection (including R17, R23, R26, R32 and R36) and the second resistor R39, the power consumption of the entire voltage detection circuit is very small, which is very important for phase line detection of long-term operation of the aerator.

[0035] As an optional embodiment of the present invention, the obtaining the voltage to ground includes: The voltage value corresponding to the voltage to ground is determined according to the maximum voltage corresponding to the voltage measurement range of the single chip microcomputer, the sampling display value corresponding to the maximum voltage, and the real-time sampling display value corresponding to the voltage to ground.

[0036] When this embodiment is applied in practice, the ADC of the single-chip microcomputer can collect a voltage of 0-5V, that is, its range is 0-5V. When it is at the maximum range of 5V, the corresponding bus voltage is 630V, and the value sampled by the corresponding software (the sampling display value corresponding to the maximum voltage) is 16384. According to the linear conversion relationship, the voltage value corresponding to the voltage to ground = 630V*real-time sampling display value / 16384.

[0037] like Figure 2 As shown, as an optional embodiment of the present invention, determining the real-time input voltage of the phase line where the node corresponding to the voltage to ground is located includes: The real-time input voltage is determined according to the following formula: VAC1=Vin R39 / (R17+R23+R26+R32+R36+R39); Among them, VAC1 represents the voltage to ground, Vin represents the real-time input voltage, R39 represents the second resistor, and R17, R23, R26, R32 and R36 all represent the first resistor.

[0038] Based on the measurement of VAC1 and knowing the sizes of the first resistors (including R17, R23, R26, R32 and R36) and the second resistors (including R39), Vin is calculated to obtain the real-time input voltage of the phase line at the node corresponding to the voltage to ground. For example, each of the first resistors is 300KΩ and the second resistors is 9.1KΩ.

[0039] When this embodiment is applied in practice, taking a phase line of one phase as an example, R39 / (R17+R23+R26+R32+R36+R39)=0.006, thereby ensuring that even when Vin is 220V, VAC1 is at most 1.33V, which is within the voltage measurement range of the single-chip microcomputer. Specifically, the setting of the first resistor (including R17, R23, R26, R32 and R36) and the second resistor (including R39) can ensure that the voltage of VAC1 is within the detectable range. Under this value, it can be confirmed that Even in the case of high voltage input, the voltage output by the voltage divider remains within the range that the microcontroller can detect, thereby preventing damage and ensuring the safety of the circuit. In addition, the use of the first resistor (including R17, R23, R26, R32 and R36) and the second resistor (including R39) results in a very small current passing through each resistor (calculated at this value, about 145μA), and the heat generated is also very low, which reduces the risk of overheating of components and the need for derating operation, ensuring the stability of the circuit during long-term operation.

[0040] As an optional embodiment of the present invention, the preset input voltage is a voltage range, and the minimum value of the voltage range is 160V, and the set time length includes 40ms.

[0041] Combined with the above calculation formula, when VAC1 is 0.9V and Vin is 150V, which is less than 160V, and the duration exceeds the set time, it is determined that the aerator has a phase line disconnection.

[0042] When this embodiment is applied in practice, due to the certain fluctuation of the three-phase voltage, in actual application, it can be obtained through actual testing that when 380V three-phase three-wire power is input into the aerator, 160V can be used as the minimum normal voltage range, and the minimum voltage range should be less than or equal to 220V. 220V is also the normal value of the phase voltage. 40ms is the longest time for determining whether it is environmental interference. These two values ​​are also the empirical values ​​of the test, which can ensure a fast response without misjudging the alarm. It is also acceptable to set other values ​​if the difference is not large. If the difference is too large, there may be the possibility of untimely response and false alarm.

[0043] As an optional embodiment of the present invention, if the duration exceeds the set duration, determining that a phase line of the aerator is disconnected includes: If it is detected that the real-time input voltage of the phase line of the node corresponding to the voltage to ground is lower than the preset input voltage for a period exceeding the set time, it is determined that the phase line of the corresponding node is disconnected.

[0044] When this embodiment is applied in practice, in a three-phase power system, usually, the three-phase voltages are balanced with each other. If it is monitored that the voltage to ground of the L1 phase is lower than the preset input voltage for a period of time exceeding a set threshold (set duration), this means that the state is not a temporary interference, but indicates the possibility of a phase failure or a line fault, thereby determining that there is a disconnection fault in the L1 phase (at least the L1 phase among L1, L2 and L3 is disconnected). Conversely, the same is true for the combination of L2, L1 and L3, and the combination of L3, L1 and L2.

[0045] As an optional embodiment of the present invention, shutting down the aerator with a phase line disconnected includes: Obtain a shutdown confirmation instruction to remotely shut down the aerator.

[0046] The remote shutdown command may be sent to a technician in a machine room that specifically manages the aerator for confirmation, so as to remotely shut down the aerator to prevent it from burning out.

[0047] Optionally, on the basis of reducing costs and not setting up technicians in a special machine room, the present application also proposes another feasible solution, wherein obtaining a shutdown confirmation instruction to remotely shut down the aerator includes: According to the inspection plan, multiple inspection points are determined by inspection personnel within a set period of time in the future.

[0048] Specifically, the inspection plan is set based on different inspection points in the same breeding area, and / or based on different breeding areas. The inspection plan includes a list of inspection personnel, inspection items and inspection punch-in time. Inspection items include the pH, dissolved oxygen content, feeding conditions and dead fish floating on the water surface in the breeding area. The setting of time periods in the future ensures the timeliness of obtaining the closing request instruction.

[0049] A shutdown confirmation request is sent based on the inspection point, wherein the shutdown confirmation request is used to request a confirmation instruction to shut down the aerator within a preset time period, and the preset time period is a floating preset duration in the inspection plan based on the inspection punch-in time period, and the preset time period does not exceed the future set time period.

[0050] Specifically, the inspection points can be equipped with dedicated IoT devices, or smart devices brought by the inspection personnel. After receiving the closing confirmation request, the IoT device or smart device can be displayed on the IoT device or smart device in the form of a pop-up window, and a confirmation reminder can be issued based on the IoT device or smart device. During the inspection, it is necessary to use the IoT device or smart device to check in for the inspection. At this time, it indicates that the inspection personnel are not far from the IoT device, or the smart device is in the inspection system login state, and it is easier to obtain the inspection personnel's confirmation instructions at this time.

[0051] For example, the inspection clock-in period is A, the preset period is A+b, and B≤A+b≤C, wherein the future set period is [B, C].

[0052] For another example, the inspection clock-in period is A, the preset period is Ab, and B≤Ab≤C, where the future set period is [B, C].

[0053] For example, the inspection time is A, and the preset time is , and B≤ ≤C, where the future set period is [B, C].

[0054] If the confirmation instruction is received within the preset time period, the closing confirmation instruction is generated according to the identity information of the inspection personnel corresponding to the confirmation instruction.

[0055] Specifically, when the confirmation instruction is received within the preset time period, it indicates that the inspector has been notified (the confirmation record is saved through the identity information), reminding the inspector to conduct further verification and provide necessary oxygenation protection for the breeding when necessary. After the inspector confirms the actual situation, the disconnected phase line can be connected and other operations can be performed to eliminate the fault. Of course, the option of refusing to close is also set, indicating that the inspector has sufficient reason to confirm that the phase line disconnection is a false alarm (this possibility is relatively small).

[0056] If the confirmation instruction is not received within the preset time period, the shutdown confirmation instruction is directly generated, and the directly generated shutdown confirmation instruction is used to shut down the aerator and start the backup oxygenation plan.

[0057] Specifically, when the confirmation instruction is not received, the motor of the aerator is at risk of burning out. At this time, a shutdown confirmation instruction is directly generated and sent to the aerator to remotely shut down the aerator, and a backup aerator can be started to avoid insufficient oxygen supply after the aerator is shut down.

[0058] When this embodiment is applied in practice, by combining with the inspection plan, the shutdown of the aerator can be confirmed by the inspection personnel as much as possible, and the inspection personnel are notified in this form to facilitate the wiring of the disconnected phase line and troubleshooting. On the other hand, when the confirmation instruction cannot be obtained, a shutdown confirmation instruction is directly generated to shut down the aerator and start the backup aerator. Even if there is no confirmation from the personnel, the possibility of burning of the aerator is avoided and the risk of insufficient oxygen supply after the aerator is shut down is reduced, thereby ensuring the normal oxygen supply of the water environment.

[0059] like Figure 2 and Figure 3As shown, the present invention also provides an aerator disconnection protection system 200, which uses the aerator disconnection protection method described in the above embodiment, and the three-phase lines (respectively L1, L2 and L3) are respectively connected to the positive and negative poles (+BUS and GND) of the aerator through a three-phase rectifier bridge B1, and each phase line of the three-phase line is connected to a voltage detection circuit, and a node is provided in the voltage detection circuit, and the voltage detection circuit is used to detect the voltage of the node to the ground, and the three-phase lines (respectively L1, L2 and L3) can also be provided with insurance (F1, F2 and F3, the model can be selected according to actual conditions), and the aerator disconnection protection system includes: An acquisition and determination module 210 is used to acquire the voltage to ground and determine a real-time input voltage of a phase line of a node corresponding to the voltage to ground; The detection module 220 is used to determine whether the time duration for which the real-time input voltage is lower than the preset input voltage exceeds a set time duration if it is detected that the real-time input voltage is lower than the preset input voltage; The shut-down module 230 is configured to determine that a phase line of the aerator is disconnected if the duration exceeds the set duration, and shut down the aerator with the phase line disconnected.

[0060] The specific implementation of this embodiment can refer to the corresponding implementation method mentioned above and will not be described again here.

[0061] like Figure 4 As shown, an electronic device 300 provided by an embodiment of the present invention includes a memory 310 and a processor 320; the memory 310 is used to store a computer program; the processor 320 is used to implement the above-mentioned aerator line break protection method when executing the computer program.

[0062] In other words, an electronic device 300 includes a memory 310 and a processor 320 coupled to the memory 310; the memory 310 is configured to store a computer program; and the processor 320 is configured to perform the following operations when executing the computer program: Acquire the voltage to ground, and determine the real-time input voltage of the phase line where the node corresponding to the voltage to ground is located; If it is detected that the real-time input voltage is lower than the preset input voltage, determining whether the duration for which the real-time input voltage is lower than the preset input voltage exceeds a set duration; If the duration exceeds the set duration, it is determined that a phase line of the aerator is disconnected, and the aerator with the phase line disconnected is shut down.

[0063] An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned aerator disconnection protection method is implemented.

[0064] In other words, a non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor performs the following operations: Acquire the voltage to ground, and determine the real-time input voltage of the phase line where the node corresponding to the voltage to ground is located; If it is detected that the real-time input voltage is lower than the preset input voltage, determining whether the duration for which the real-time input voltage is lower than the preset input voltage exceeds a set duration; If the duration exceeds the set duration, it is determined that a phase line of the aerator is disconnected, and the aerator with the phase line disconnected is shut down.

[0065] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided by the present invention can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0066] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

[0067] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A method for protecting an aerator from line breakage, characterized in that: The three-phase line is connected to the positive and negative electrodes of the aerator respectively through a three-phase rectifier bridge, and a voltage detection circuit is connected to each phase line of the three-phase line. A node is provided in the voltage detection circuit, and the voltage detection circuit is used to detect the voltage of the node to the ground. The aerator line break protection method includes: Acquire the voltage to ground, and determine the real-time input voltage of the phase line where the node corresponding to the voltage to ground is located; If it is detected that the real-time input voltage is lower than the preset input voltage, determining whether the duration for which the real-time input voltage is lower than the preset input voltage exceeds a set duration; If the duration exceeds the set duration, it is determined that a phase line of the aerator is disconnected, and the aerator with the phase line disconnected is shut down.

2. The aerator disconnection protection method according to claim 1, characterized in that: The voltage detection circuit includes a diode, a plurality of first resistors and a second resistor connected in sequence, wherein the positive electrode of the diode has a common potential with the input end of the three-phase rectifier bridge, the node is arranged between the last first resistor and the second resistor in the current direction among the plurality of first resistors, one end of the second resistor away from the first resistor is grounded, the resistance value of the first resistor is at least one order of magnitude larger than the resistance value of the second resistor, and the node is connected to the voltage measurement pin of the single-chip computer.

3. The aerator disconnection protection method according to claim 2, characterized in that: The obtaining the voltage to ground comprises: The voltage value corresponding to the voltage to ground is determined according to the maximum voltage corresponding to the voltage measurement range of the single chip microcomputer, the sampling display value corresponding to the maximum voltage, and the real-time sampling display value corresponding to the voltage to ground.

4. The aerator disconnection protection method according to claim 2, characterized in that: Determining the real-time input voltage of the phase line of the node corresponding to the voltage to ground includes: The real-time input voltage is determined according to the following formula: VAC1=Vin R39 / (R17+R23+R26+R32+R36+R39); Among them, VAC1 represents the voltage to ground, Vin represents the real-time input voltage, R39 represents the second resistor, and R17, R23, R26, R32 and R36 all represent the first resistor.

5. The aerator disconnection protection method according to claim 4, characterized in that: Each of the first resistors is 300KΩ, and each of the second resistors is 9.1KΩ.

6. The aerator disconnection protection method according to claim 4 or 5, characterized in that: The preset input voltage is a voltage range, and the minimum value of the voltage range is 160V, and the set time length is 40ms.

7. The aerator disconnection protection method according to any one of claims 1 to 5, characterized in that: If the duration exceeds the set duration, determining that the aerator has a phase disconnection includes: If it is detected that the real-time input voltage of the phase line of the node corresponding to the voltage to ground is lower than the preset input voltage for a period exceeding the set time, it is determined that the phase line of the corresponding node is disconnected.

8. The aerator disconnection protection method according to any one of claims 1 to 5, characterized in that: The shutting down of the aerator with phase line disconnection comprises: Obtain a shutdown confirmation instruction to remotely shut down the aerator.

9. The aerator disconnection protection method according to claim 8, characterized in that: The step of obtaining a shutdown confirmation instruction to remotely shut down the aerator includes: Determine the inspection points of multiple inspectors within a set period in the future according to the inspection plan; Sending a shutdown confirmation request based on the inspection point, wherein the shutdown confirmation request is used to request obtaining a confirmation instruction to shut down the aerator within a preset time period, and the preset time period is a floating preset duration based on the inspection punch-in time period in the inspection plan, and the preset time period does not exceed the future set time period; If the confirmation instruction is received within the preset time period, generating the closing confirmation instruction according to the identity information of the inspection personnel corresponding to the confirmation instruction; If the confirmation instruction is not received within the preset time period, the shutdown confirmation instruction is directly generated, and the directly generated shutdown confirmation instruction is used to shut down the aerator and start the backup oxygenation plan.

10. An aerator disconnection protection system, characterized in that: The aerator disconnection protection method according to any one of claims 1 to 9 is applied, wherein the three-phase line is respectively connected to the positive and negative electrodes of the aerator through a three-phase rectifier bridge, and a voltage detection circuit is connected to each phase line of the three-phase line, and a node is provided in the voltage detection circuit, and the voltage detection circuit is used to detect the voltage of the node to the ground. The aerator disconnection protection system comprises: An acquisition and determination module, used to acquire the voltage to ground and determine the real-time input voltage of the phase line where the node corresponding to the voltage to ground is located; a detection module, for determining whether a duration for which the real-time input voltage is lower than the preset input voltage exceeds a set duration if it is detected that the real-time input voltage is lower than the preset input voltage; The shut-down module is used to determine that a phase line of the aerator is disconnected if the duration exceeds the set duration, and shut down the aerator with the phase line disconnected.

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