High and low voltage protection method and system for equipment

Abstract

The invention provides a high and low voltage protection method and system for equipment, and relates to the technical field of voltage protection, the equipment is connected with the output end of a three-phase rectifier bridge, the input end of the three-phase rectifier bridge supplies power through a three-phase line, the output end of the three-phase rectifier bridge is provided with a capacitor filter circuit, and the capacitor filter circuit is connected with the output end of the three-phase rectifier bridge. A power supply voltage acquisition circuit is arranged between a positive electrode of the equipment and a common ground, and the high and low voltage protection method of the equipment comprises the following steps: acquiring a bus voltage of the equipment through the power supply voltage acquisition circuit; judging whether the bus voltage is within a limit working voltage range of the equipment or not; and if the bus voltage is within the limit working voltage range, controlling the equipment to start or controlling the equipment to continue working. According to the invention, the risk of damage and even burnout of equipment caused by too high or too low voltage is reduced on the whole, and the dependence on artificial experience is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of voltage protection, and in particular to a high and low voltage protection method and system for equipment. Background Art

[0002] For devices that use electrical energy in a three-phase power grid, the voltage input to the device will inevitably fluctuate due to differences in distance from the transformer, different regional power usage conditions, and possible differences in the device input lines. In the prior art, the opening or closing of the device under the fluctuating voltage depends on manual experience and judgment, and it is impossible to determine the appropriate time to shut down or start up, which leads to the risk of damage to such equipment. Summary of the invention

[0003] The problem to be solved by the present invention is that the opening or closing of equipment in a three-phase 380V power grid cannot determine a suitable shutdown time or startup time, and there is a risk of damage.

[0004] In order to solve the above problems, in the first aspect, the present invention provides a high and low voltage protection method for a device, wherein the device is connected to the output end of a three-phase rectifier bridge, the input end of the three-phase rectifier bridge is powered by a three-phase line, the output end of the three-phase rectifier bridge is provided with a capacitor filter circuit, and a power supply voltage collection circuit is provided between the positive pole and the common ground of the device, and the high and low voltage protection method of the device comprises: Collecting the bus voltage of the device through the power supply voltage collection circuit; Determining whether the bus voltage is within the limit operating voltage range of the device; If the bus voltage is within the limit operating voltage range, controlling the device to start or controlling the device to continue working; If the bus voltage is not within the limit operating voltage range, detecting whether the duration for which the bus voltage is not within the limit operating voltage range reaches a threshold value for abnormal operating duration; If the duration reaches the abnormal operation duration threshold, the device is controlled to shut down.

[0005] Optionally, the determining whether the bus voltage is within a limit operating voltage range of the device includes: Determining whether the bus voltage is less than a minimum value of the limit operating voltage range, or determining whether the bus voltage is greater than a maximum value of the limit operating voltage range; If the bus voltage is less than the minimum value of the extreme operating voltage range, or the bus voltage is greater than the maximum value of the extreme operating voltage range, it is determined that the bus voltage is not within the extreme operating voltage range; otherwise, it is determined that the bus voltage is within the extreme operating voltage range.

[0006] Optionally, it also includes: Obtaining the standard deviation voltage under the three-phase line power supply and the overvoltage and undervoltage working values ​​of the device; The limit operating voltage range is determined according to the standard deviation voltage and the over-voltage and under-voltage operating values.

[0007] Optionally, the device includes an aerator, and when the three-phase voltage is 380V, the determined limit operating voltage range includes 290V-480V.

[0008] Optionally, the capacitor filter circuit includes: A first electrolytic capacitor and a second electrolytic capacitor, the first electrolytic capacitor and the second electrolytic capacitor are connected in series and connected in parallel between the positive electrode and the negative electrode of the output end of the three-phase rectifier bridge, and the total withstand voltage of the first electrolytic capacitor and the second electrolytic capacitor is greater than the standard deviation voltage.

[0009] Optionally, the abnormal working time threshold corresponding to the extreme working voltage range is 100ms.

[0010] Optionally, after determining whether the bus voltage is within a limit operating voltage range of the device, the method further includes: A corresponding prompt is given according to whether the bus voltage is within the limit operating voltage range of the device, wherein the method of giving the corresponding prompt includes flashing a light based on the device, and the number of light flashes corresponding to when the bus voltage is within the limit operating voltage range of the device and when the bus voltage is not within the limit operating voltage range of the device is different.

[0011] Optionally, if the bus voltage is within the limit operating voltage range, controlling the device to start or controlling the device to continue working includes: If the bus voltage is within the limit operating voltage range, a prompt message indicating that the voltage protection detection is qualified is displayed based on the device, and a control instruction is obtained to control the device to start or control the device to continue working.

[0012] Optionally, the displaying of prompt information indicating that the voltage protection test is qualified based on the device and acquiring a control instruction to control the device to start or control the device to continue working includes: Display the prompt information, and determine whether the control instruction is received within a preset time period; If the control instruction is not received within the preset time period, based on the first working condition and the second working condition, determine whether it is currently necessary to control the device to start or control the device to continue working; if it is determined that it is currently necessary to control the device to start or control the device to continue working, send a control request message to the control terminal to obtain the control instruction, wherein when at least one of the first working condition and the second working condition is met, it is determined that it is currently necessary to control the device to start or control the device to continue working, the first working condition includes that the real-time area image of the working area covered by the device and the area abnormal state image of the working area meet a preset similarity threshold, and the second working condition includes that it is currently in the working reservation period, or that the control instruction is received within the preset time period; According to the control instruction, the device is controlled to start according to the set working parameters or the device is controlled to continue working, wherein the control instruction includes the set working parameters.

[0013] The present invention collects the bus voltage of the device through the power supply voltage collection circuit, determines whether the bus voltage is within the limit working voltage range of the device, and if the bus voltage is within the limit working voltage range, controls the device to start or controls the device to continue working, thereby ensuring that the device is in a normal voltage environment within a safe range, and the device has the conditions to start or continue working in time; by detecting that the bus voltage is not within the limit working voltage range, detects whether the duration of the bus voltage not being within the limit working voltage range reaches a threshold of the abnormal working time; if the duration reaches the threshold of the abnormal working time, controls the device to shut down, thereby avoiding misjudgment caused by voltage fluctuations due to interference conditions such as accidental factors, and ensuring that the device can be shut down in time when there is a real voltage abnormality, thereby reducing the risk of damage or even burning of the device due to excessively high or low voltage as a whole, and reducing dependence on manual experience.

[0014] In a second aspect, the present invention further provides a high and low voltage protection system for a device, using the high and low voltage protection method for a device as described in any one of the above, the device is connected to the output end of a three-phase rectifier bridge, the input end of the three-phase rectifier bridge is powered by a three-phase line, the output end of the three-phase rectifier bridge is provided with a capacitor filter circuit, a power supply voltage collection circuit is provided between the positive pole of the device and the common ground, and the high and low voltage protection system of the device comprises: A collection module, used for collecting the bus voltage of the device through the power supply voltage collection circuit; A judging module, used for judging whether the bus voltage is within the limit operating voltage range of the device; A first control module, configured to control the device to start or to continue to work if the bus voltage is within the limit operating voltage range; A detection module, configured to detect, if the bus voltage is not within the limit operating voltage range, whether a duration for which the bus voltage is not within the limit operating voltage range reaches a threshold for an abnormal operating time; The second control module is used to control the device to shut down if the duration reaches the abnormal operation duration threshold.

[0015] 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 high and low voltage protection method for the device as described in the first aspect when executing the computer program.

[0016] 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 high and low voltage protection method of the device as described in the first aspect is implemented.

[0017] The high and low voltage protection system, electronic device and computer-readable storage medium provided by the present invention have the same beneficial effects as the high and low voltage protection method of the device relative to the prior art, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic flow chart of a high and low voltage protection method for a device in an embodiment of the present invention is shown; Figure 2 A circuit diagram showing a high and low voltage protection method for a device in an embodiment of the present invention is shown; Figure 3 A schematic diagram showing the composition of a high and low voltage protection system of a device in an embodiment of the present invention is shown; Figure 4 A schematic diagram showing the composition of an electronic device in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0019] 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.

[0020] 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.

[0021] 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.

[0022] Excessive voltage may cause insulation breakdown of the internal circuit components of the device, resulting in permanent damage, while insufficient voltage may cause the device to be unable to provide the required power, which in turn causes unstable operation of the device, and may cause jitter, shutdown, etc. Long-term low-voltage operation may cause insufficient torque for equipment such as motors, which may cause wear or damage to mechanical parts over time. In addition, when the voltage is too low, it may not be able to output power to the outside. Some equipment may overheat due to excessive current, resulting in damage or failure.

[0023] Reference Figure 1 and Figure 2 As shown, an embodiment of the present invention proposes a high and low voltage protection method for a device, wherein the device (not shown in the figure) is connected to the output end of a three-phase rectifier bridge B1, the input end of the three-phase rectifier bridge B1 is powered by three-phase lines (L1, L2 and L3), the output end of the three-phase rectifier bridge B1 is provided with a capacitor filter circuit, and a power supply voltage collection circuit is provided between the positive pole and the common ground of the device, and the high and low voltage protection method of the device includes: S100: collecting the bus voltage of the device through the power supply voltage collection circuit.

[0024] Specifically, the range of bus voltage to be measured can be estimated and determined first (the voltage of the three-phase 380V power grid that is ultimately input to the device may reach 300V to 450V), and a suitable voltage acquisition circuit can be selected. An analog voltage acquisition module (such as an operational amplifier, ADC) or a dedicated voltage sensor can be used for acquisition. The capacitor filter circuit ensures that the collected bus voltage is as stable as possible, so that the comparison result between the bus voltage and the extreme working voltage range is credible. In addition, before obtaining the final bus voltage, the collected voltage can also be subjected to preliminary filtering.

[0025] S200: Determine whether the bus voltage is within the limit operating voltage range of the device.

[0026] Specifically, the collected bus voltage is compared with the extreme working voltage range of the device to determine whether the bus voltage is within a set range. The extreme working voltage range is also the extreme voltage range for normal operation of the device.

[0027] S300: If the bus voltage is within the limit operating voltage range, control the device to start or control the device to continue working.

[0028] Specifically, if the bus voltage is within the extreme operating voltage range, it means that the device has a voltage environment that operates within a normal and safe range, and a signal can be sent to start the device or allow it to continue working (the device starts to be in a shutdown state or a working state).

[0029] S400: If the bus voltage is not within the limit operating voltage range, detect whether the duration for which the bus voltage is not within the limit operating voltage range reaches a threshold of abnormal operating duration.

[0030] Specifically, the bus voltage is continuously monitored to determine whether it is within the limit operating voltage range. Once it is detected that the voltage is not within the range, the timing is started, the time when it is not within the range is continuously recorded, and compared with the set working abnormality duration threshold.

[0031] S500: If the duration reaches the abnormal operation duration threshold, the device is controlled to shut down.

[0032] Specifically, if the duration of being out of range reaches the abnormal operation duration threshold, the system is considered to be operating abnormally, and the instantaneous voltage fluctuation is considered to be normal. Setting the duration can avoid frequent equipment shutdowns due to short-term voltage fluctuations (considered normal).

[0033] When this embodiment is applied in practice, the bus voltage of the device is collected by the power supply voltage collection circuit to determine whether the bus voltage is within the limit working voltage range of the device. If the bus voltage is within the limit working voltage range, the device is controlled to start or to continue working, which can ensure that the device is in a normal voltage environment within a safe range and that the device has the conditions to start or continue working in a timely manner; by checking that the bus voltage is not within the limit working voltage range, it is detected whether the duration for which the bus voltage is not within the limit working voltage range reaches a threshold value for the abnormal working duration; if the duration reaches the threshold value for the abnormal working duration, the device is controlled to shut down, thereby avoiding misjudgment caused by voltage fluctuations due to interference conditions such as accidental factors, and ensuring that the device can be shut down in a timely manner when a voltage abnormality actually exists, thereby reducing the risk of damage or even burning of the device due to excessively high or low voltage as a whole, and reducing dependence on manual experience.

[0034] The above real-time monitoring and judgment of the bus voltage status, combined with the logical judgment of the duration, can effectively distinguish between situations where the voltage is too high or too low, so that corresponding control measures can be taken. This can ensure that the equipment always operates within a safe voltage range, improve the safety and reliability of the equipment, and reduce the potential risks caused by abnormal voltage.

[0035] As an optional embodiment of the present invention, the determining whether the bus voltage is within the limit operating voltage range of the device includes: It is determined whether the bus voltage is less than a minimum value of the limit operating voltage range, or it is determined whether the bus voltage is greater than a maximum value of the limit operating voltage range.

[0036] If the bus voltage is less than the minimum value of the extreme operating voltage range, or the bus voltage is greater than the maximum value of the extreme operating voltage range, it is determined that the bus voltage is not within the extreme operating voltage range; otherwise, it is determined that the bus voltage is within the extreme operating voltage range.

[0037] When this embodiment is applied in practice, the bus voltage is less than the minimum value of the extreme working voltage range, or the bus voltage is greater than the maximum value of the extreme working voltage range. If either of the above conditions holds, it can be determined that the bus voltage is not within the extreme working voltage range. When the bus voltage is greater than or equal to the minimum value of the extreme working voltage range, and the bus voltage is less than or equal to the maximum value of the extreme working voltage range, it can be considered that the bus voltage is within the extreme working voltage range.

[0038] As an optional embodiment of the present invention, the power supply voltage collection circuit includes a plurality of first resistors (including R1, R2, R3, R4 and R5) and a second resistor R6 connected in sequence, wherein one end of the first resistor R1 away from the second resistor R2 is at the same potential as the positive electrode of the device, one end of the second resistor R6 away from the first resistor R5 is grounded, and a voltage division collection point is set between the first resistor R5 and the second resistor R6, and the voltage collected by the voltage division collection point (which can be collected by a controller, etc.) is VDC=Vbus+ R6 / (R1+R2+R3+R4+R5+R6), by collecting VDC, the voltage value of the bus Vbus+ can be indirectly calculated, wherein the first resistor uses multiple resistors R1 to R5 connected in series. After multiple resistors divide the voltage, the voltage and power consumption on each resistor can be reduced. The first resistors R1 to R5 can be 800KΩ, and the second resistor R6 can be 10KΩ.

[0039] As an optional embodiment of the present invention, the power supply voltage acquisition circuit includes a voltage sensor (the voltage sensor is installed between the positive and negative electrodes), a conditioning circuit, an analog-to-digital converter (ADC), and a microcontroller or processing unit connected in sequence, wherein the voltage sensor is a sensor for measuring the power supply voltage, which may be a voltage divider circuit, an operational amplifier input, or a dedicated voltage sensor chip, and these components can convert the actual voltage of the power supply into a voltage signal suitable for subsequent circuit processing; the signal conditioning circuit is used to process the signal output by the sensor, such as amplification, filtering, and noise reduction, etc., to ensure that the subsequent analog or digital processing signal has good quality. This part may include an operational amplifier, a filter, and a reference voltage source, etc., and the signal conditioning circuit is an existing circuit; the analog-to-digital converter (ADC) is used to convert the conditioned analog voltage signal into a digital signal, which is convenient for the microcontroller or digital processing unit to calculate and analyze. In some high-precision applications, a high-resolution ADC may be used; the microcontroller or processing unit is responsible for receiving the output of the ADC, processing, storing, and making decisions. The microcontroller can execute control logic and decide whether to issue an alarm or perform other operations based on the collected data.

[0040] As an optional embodiment of the present invention, it also includes: The standard deviation voltage under the power supply of the three-phase lines (L1, L2 and L3) and the overvoltage and undervoltage working values ​​of the device are obtained.

[0041] The limit operating voltage range is determined according to the standard deviation voltage and the over-voltage and under-voltage operating values.

[0042] When this embodiment is applied in practice, according to industry standards, the allowable deviation of the 380V three-phase power supply voltage is -10% and +7% of the nominal voltage. For a power supply with a phase voltage of 380V, its normal voltage range is 342~418V. In actual applications, the standard deviation voltage may be between 300V and 450V. Considering the extreme working voltage of the equipment, it is also necessary to obtain the over-voltage and under-voltage working values ​​of the equipment under experimental conditions or given on the nameplate. The over-voltage and under-voltage working values ​​are the voltage values ​​of the equipment under extreme conditions. For example, the over-voltage and under-voltage of the aerator are 290V-480V (undervoltage is 290V and overvoltage is 480V). The intersection of the standard deviation voltage and the over-voltage and under-voltage working values ​​is taken to obtain the extreme working voltage range, which can not only meet the actual normal use but also prevent the equipment (controllers and components such as motors) from being damaged due to voltage abnormalities.

[0043] As an optional embodiment of the present invention, the equipment includes an aerator, and when the three-phase voltage is 380V, the determined limit operating voltage range includes 290V-480V.

[0044] Specifically, when the object of the device is an aerator, it uses a 380V three-phase line (L1, L2 and L3), and the working range of the limit voltage determined by the above embodiment is 290V-480V.

[0045] As an optional embodiment of the present invention, the capacitor filter circuit includes: A first electrolytic capacitor C1 and a second electrolytic capacitor C2 are connected in series and connected in parallel between the positive and negative electrodes of the output end of the three-phase rectifier bridge B1. The total withstand voltage of the first electrolytic capacitor and the second electrolytic capacitor is greater than the standard deviation voltage.

[0046] When this embodiment is applied in practice, the first electrolytic capacitor C1 and the second electrolytic capacitor C2 are of the same model and both are 400V electrolytic capacitors. The two electrolytic capacitors are connected in series, and the total withstand voltage is the sum of the two capacitor voltages, that is, 800V. The three-phase circuit can reach about 600V after rectification by a rectifier bridge. Therefore, the withstand voltage of 800V is increased by connecting two conventional 400V electrolytic capacitors in series, which can meet the requirements of smoothing and filtering the AC component in the DC voltage, reducing noise, and ensuring stable power output.

[0047] As an optional embodiment of the present invention, the abnormal working time threshold corresponding to the extreme working voltage range is 100ms.

[0048] When this embodiment is applied in practice, for example, when the extreme working voltage range is determined to be 290V-480V, the corresponding working abnormality duration threshold is determined to be 100ms. These two values ​​are also one of the empirical values ​​of the test, which can ensure effective detection without misjudgment due to environmental interference factors. It is also acceptable to set other values ​​if the difference is not large. If the difference is too large, the equipment may be damaged or misjudgment may occur.

[0049] As an optional embodiment of the present invention, after determining whether the bus voltage is within the limit operating voltage range of the device, the method further includes: A corresponding prompt is given according to whether the bus voltage is within the limit operating voltage range of the device, wherein the method of giving the corresponding prompt includes flashing a light based on the device, and the number of light flashes corresponding to when the bus voltage is within the limit operating voltage range of the device and when the bus voltage is not within the limit operating voltage range of the device is different.

[0050] Exemplarily, an LED light is provided on the device, and there will be a corresponding number of flashing lights to prompt the two situations of whether the bus voltage is within the extreme operating voltage range of the device, such as: the bus voltage flashes 8 times within the extreme operating voltage range of the device, the bus voltage is not within the extreme operating voltage range of the device and the voltage is too high and the light flashes 10 times, the device over-temperature flashes 3 times, etc.

[0051] When this embodiment is applied in practice, through corresponding prompting methods, it is possible to distinguish whether the bus voltage is within the extreme operating voltage range of the device, which is convenient for management and control personnel to make decisions.

[0052] As an optional embodiment of the present invention, if the bus voltage is within the limit operating voltage range, controlling the device to start or controlling the device to continue working includes: If the bus voltage is within the limit operating voltage range, a prompt message indicating that the voltage protection detection is qualified is displayed based on the device, and a control instruction is obtained to control the device to start or control the device to continue working.

[0053] Specifically, by detecting whether the bus voltage is within the extreme operating voltage range, it can ensure that the equipment is operating under safe voltage conditions, reduce the risk of failure, and instantly display a prompt message that the voltage protection test is qualified, ensuring that management and control personnel can understand the equipment status in a timely manner, improve response speed, and automatically obtain control instructions, thereby improving management efficiency and convenience, and then being able to control the equipment to start or continue working according to actual needs, and adapt to changing working environments.

[0054] As an optional implementation of the previous embodiment, the step of displaying prompt information indicating that the voltage protection test is qualified based on the device and obtaining a control instruction to control the device to start or control the device to continue working includes: The prompt information is displayed, and it is determined whether the control instruction is received within a preset time period.

[0055] Specifically, after the prompt information is displayed on a display screen equipped with the device or a smart terminal that has a communication connection with the device, the person in charge of controlling the device may pay attention to the prompt information.

[0056] If the control instruction is not received within the preset time period, based on the first working condition and the second working condition, determine whether it is currently necessary to control the device to start or control the device to continue working; if it is determined that it is currently necessary to control the device to start or control the device to continue working, send a control request message to the control terminal to obtain the control instruction, wherein when at least one of the first working condition and the second working condition is met, it is determined that it is currently necessary to control the device to start or control the device to continue working, the first working condition includes that the real-time area image of the working area covered by the device and the area abnormal state image of the working area meet a preset similarity threshold, and the second working condition includes that it is currently in the work reservation period, or that the control instruction is received within the preset time period.

[0057] Specifically, on the one hand, if the control instruction is not received within the preset time period, it is very likely that the prompt information has not been paid attention to, and the control personnel may be far away (if the control personnel actively closes the prompt information, the control request information will not be sent to the control terminal). At this time, considering that there may still be a need to control the equipment, it is determined whether at least one of the first working condition and the second working condition is met. If so, a control request information is sent to the control terminal. The control terminal is controlled by the control personnel in the central control room. The control personnel in the central control room can feedback the control instruction through the control terminal to start or control the equipment to continue working; the first working condition is to actively obtain the real-time regional image of the working area covered by the equipment, and determine whether it meets the preset similarity threshold with the regional abnormal state image of the working area. The regional abnormal state image indicates that the working area needs the equipment to work to change the state of the area. For example, the regional abnormal state image is that the breeding area is hypoxic and there are fish floating their heads to breathe. Related images, at this time, the oxygenation equipment needs to be started (the actual covered floating head density and the abnormal area ratio can be determined according to the regional abnormal state image, and then the working parameters of the oxygenation equipment can be further determined. This working parameter is generally a basic working parameter, which can be further confirmed manually later. The basic working parameters can ensure that the hypoxic state of the breeding area can be improved. For example, the floating head density and the abnormal area ratio are identified according to the regional abnormal state image, and the corresponding working parameters are queried in the preset oxygenation parameter table according to the identified floating head density and the abnormal area ratio. The preset oxygenation parameter table is a corresponding table of floating head density, abnormal area ratio and working parameters); in addition, the second working condition is that the current time is within the preset period of oxygen supply, such as noon on a sunny day, early morning on a cloudy day, and midnight on a continuous rainy day; at least one of these two conditions is met, that is, a control request information is sent to the control terminal. In addition, it is necessary to first detect whether the second working condition is met, and then detect whether the first working condition is met.

[0058] The first working condition and / or the second working condition only needs to satisfy at least one of the three conditions, and in practice, they can be selected according to actual needs.

[0059] On the other hand, the equipment control personnel may pay attention to the prompt information. If there is a need to control or start the equipment at this time, they can directly issue control instructions based on the display screen or the intermediate terminal to control the equipment to start or continue working.

[0060] According to the control instruction, the device is controlled to start according to the set working parameters or the device is controlled to continue working, wherein the control instruction includes the set working parameters.

[0061] Specifically, the control instructions include set working parameters, which may be input by the control personnel or selected by the control personnel based on stored parameters, such as oxygen enrichment duration and oxygen enrichment rate.

[0062] When this embodiment is applied in practice, a comprehensive judgment is made through the first working condition (the similarity between the real-time regional image and the regional abnormal state image) and the second working condition (the demand within the time period) to ensure that the equipment is started and controlled to continue working at the necessary moment. That is, based on the intelligent judgment of the environmental state (such as insufficient oxygen, etc.) and the time period, effective decisions can be made to ensure that the equipment operates safely when needed and improve resource utilization efficiency. Through the intelligent monitoring and control mechanism, the operating efficiency and safety of the equipment are improved, the demand for manual intervention is reduced, and a more convenient and efficient management method is provided for the management and protection of the equipment by the management and control personnel.

[0063] like Figure 3 As shown, the present invention also provides a high and low voltage protection system 200 for a device, applying the high and low voltage protection method for the device as described in the above embodiment, the device is connected to the output end of the three-phase rectifier bridge B1, the input end of the three-phase rectifier bridge B1 is powered by three-phase lines (L1, L2 and L3), the output end of the three-phase rectifier bridge B1 is provided with a capacitor filter circuit, a power supply voltage collection circuit is provided between the positive pole and the common ground of the device, and the three-phase lines (L1, L2 and L3) can also be respectively installed with fuse switch tubes (F1, F2 and F3), and the high and low voltage protection system of the device includes: A collection module 210, used for collecting the bus voltage of the device through the power supply voltage collection circuit; A determination module 220, configured to determine whether the bus voltage is within a limit operating voltage range of the device; A first control module 230, configured to control the device to start or to continue to work if the bus voltage is within the limit operating voltage range; The detection module 240 is used to detect whether the duration of the bus voltage not being within the limit operating voltage range reaches a threshold of abnormal operation duration if the bus voltage is not within the limit operating voltage range; The second control module 250 is configured to control the device to shut down if the duration reaches the abnormal operation duration threshold.

[0064] The specific implementation of this embodiment can refer to the corresponding implementation method mentioned above and will not be described again here.

[0065] like Figure 4As 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 high and low voltage protection method of the device as described above when executing the computer program.

[0066] 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: Collecting the bus voltage of the device through the power supply voltage collection circuit; Determining whether the bus voltage is within the limit operating voltage range of the device; If the bus voltage is within the limit operating voltage range, controlling the device to start or controlling the device to continue working; If the bus voltage is not within the limit operating voltage range, detecting whether the duration for which the bus voltage is not within the limit operating voltage range reaches a threshold value for abnormal operating duration; If the duration reaches the abnormal operation duration threshold, the device is controlled to shut down.

[0067] 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 high and low voltage protection method of the device as described above is implemented.

[0068] 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: Collecting the bus voltage of the device through the power supply voltage collection circuit; Determining whether the bus voltage is within the limit operating voltage range of the device; If the bus voltage is within the limit operating voltage range, controlling the device to start or controlling the device to continue working; If the bus voltage is not within the limit operating voltage range, detecting whether the duration for which the bus voltage is not within the limit operating voltage range reaches a threshold value for abnormal operating duration; If the duration reaches the abnormal operation duration threshold, the device is controlled to shut down.

[0069] 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).

[0070] 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.

[0071] 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 high and low voltage protection method for equipment, characterized in that: The device is connected to the output end of a three-phase rectifier bridge, the input end of the three-phase rectifier bridge is powered by a three-phase line, the output end of the three-phase rectifier bridge is provided with a capacitor filter circuit, a power supply voltage collection circuit is provided between the positive pole of the device and the common ground, and the high and low voltage protection method of the device includes: Collecting the bus voltage of the device through the power supply voltage collection circuit; Determining whether the bus voltage is within the limit operating voltage range of the device; If the bus voltage is within the limit operating voltage range, controlling the device to start or controlling the device to continue working; If the bus voltage is not within the limit operating voltage range, detecting whether the duration for which the bus voltage is not within the limit operating voltage range reaches a threshold value for abnormal operating duration; If the duration reaches the abnormal operation duration threshold, the device is controlled to shut down.

2. The high and low voltage protection method for equipment according to claim 1, characterized in that: The determining whether the bus voltage is within the limit operating voltage range of the device comprises: Determining whether the bus voltage is less than a minimum value of the limit operating voltage range, or determining whether the bus voltage is greater than a maximum value of the limit operating voltage range; If the bus voltage is less than the minimum value of the extreme operating voltage range, or the bus voltage is greater than the maximum value of the extreme operating voltage range, it is determined that the bus voltage is not within the extreme operating voltage range; otherwise, it is determined that the bus voltage is within the extreme operating voltage range.

3. The high and low voltage protection method for equipment according to claim 1, characterized in that: Also includes: Obtaining the standard deviation voltage under the three-phase line power supply and the overvoltage and undervoltage working values ​​of the device; The limit operating voltage range is determined according to the standard deviation voltage and the over-voltage and under-voltage operating values.

4. The high and low voltage protection method for equipment according to claim 3, characterized in that: The equipment includes an aerator. When the three-phase voltage is 380V, the determined limit operating voltage range includes 290V-480V.

5. The high and low voltage protection method for equipment according to claim 3 or 4, characterized in that: The capacitor filter circuit comprises: A first electrolytic capacitor and a second electrolytic capacitor, the first electrolytic capacitor and the second electrolytic capacitor are connected in series and connected in parallel between the positive electrode and the negative electrode of the output end of the three-phase rectifier bridge, and the total withstand voltage of the first electrolytic capacitor and the second electrolytic capacitor is greater than the standard deviation voltage.

6. The high and low voltage protection method for equipment according to any one of claims 1 to 4, characterized in that: The abnormal working time threshold corresponding to the extreme working voltage range is 100ms.

7. The high and low voltage protection method for equipment according to any one of claims 1 to 4, characterized in that: After determining whether the bus voltage is within the limit operating voltage range of the device, the method further includes: A corresponding prompt is given according to whether the bus voltage is within the limit operating voltage range of the device, wherein the method of giving the corresponding prompt includes flashing a light based on the device, and the number of light flashes corresponding to when the bus voltage is within the limit operating voltage range of the device and when the bus voltage is not within the limit operating voltage range of the device is different.

8. The high and low voltage protection method for equipment according to claim 7, characterized in that: If the bus voltage is within the limit operating voltage range, controlling the device to start or controlling the device to continue working includes: If the bus voltage is within the limit operating voltage range, a prompt message indicating that the voltage protection detection is qualified is displayed based on the device, and a control instruction is obtained to control the device to start or control the device to continue working.

9. The high and low voltage protection method for equipment according to claim 8, characterized in that: The step of displaying prompt information indicating that the voltage protection test is qualified based on the device and obtaining a control instruction to control the device to start or control the device to continue working includes: Display the prompt information, and determine whether the control instruction is received within a preset time period; If the control instruction is not received within the preset time period, based on the first working condition and the second working condition, determine whether it is currently necessary to control the device to start or control the device to continue working; if it is determined that it is currently necessary to control the device to start or control the device to continue working, send a control request message to the control terminal to obtain the control instruction, wherein when at least one of the first working condition and the second working condition is met, it is determined that it is currently necessary to control the device to start or control the device to continue working, the first working condition includes that the real-time area image of the working area covered by the device and the area abnormal state image of the working area meet a preset similarity threshold, and the second working condition includes that it is currently in the working reservation period, or that the control instruction is received within the preset time period; According to the control instruction, the device is controlled to start according to the set working parameters or the device is controlled to continue working, wherein the control instruction includes the set working parameters.

10. A high and low voltage protection system for equipment, characterized in that: The high and low voltage protection method of the device according to any one of claims 1 to 9 is applied, the device is connected to the output end of a three-phase rectifier bridge, the input end of the three-phase rectifier bridge is powered by a three-phase line, the output end of the three-phase rectifier bridge is provided with a capacitor filter circuit, a power supply voltage collection circuit is provided between the positive pole of the device and the common ground, and the high and low voltage protection system of the device includes: A collection module, used for collecting the bus voltage of the device through the power supply voltage collection circuit; A judging module, used for judging whether the bus voltage is within the limit operating voltage range of the device; A first control module, configured to control the device to start or to continue to work if the bus voltage is within the limit operating voltage range; A detection module, configured to detect, if the bus voltage is not within the limit operating voltage range, whether a duration for which the bus voltage is not within the limit operating voltage range reaches a threshold for an abnormal operating time; The second control module is used to control the device to shut down if the duration reaches the abnormal operation duration threshold.

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