CN116447119A - Control system for water pump anhydrous protection - Google Patents
Control system for water pump anhydrous protection Download PDFInfo
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- CN116447119A CN116447119A CN202310328441.3A CN202310328441A CN116447119A CN 116447119 A CN116447119 A CN 116447119A CN 202310328441 A CN202310328441 A CN 202310328441A CN 116447119 A CN116447119 A CN 116447119A
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- water pump
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 131
- 238000003745 diagnosis Methods 0.000 claims abstract description 74
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims description 34
- 238000006243 chemical reaction Methods 0.000 claims description 24
- 238000013507 mapping Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 abstract description 17
- 230000008569 process Effects 0.000 abstract description 9
- 238000005070 sampling Methods 0.000 description 13
- 238000013461 design Methods 0.000 description 10
- 230000002159 abnormal effect Effects 0.000 description 5
- 238000013178 mathematical model Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a control system for water pump anhydrous protection, comprising: the motor sensing module monitors torque current; the motor sensing module is connected with a controller, and the controller acquires torque current and power data; the controller is connected with a diagnosis module, and the diagnosis module performs water pump diagnosis according to power and efficiency and sends out an adjustment signal; the monitoring difficulty in the running process of the water pump is reduced, the detection by using multiple sensors is avoided, and meanwhile, the reliability of running diagnosis of the water pump is improved; the monitoring of the water pump work does not need to be provided with a plurality of additional sensors to monitor the flow speed and other states of the water pump, so that a plurality of places in the water pump are not required to be provided with related physical structures of the sensors, and the water pump cannot be influenced by the arrangement structures of the sensors.
Description
Technical Field
The invention relates to the technical field of water pump monitoring, in particular to a control system for water pump anhydrous protection.
Background
The water pump is generally applied to various fields such as industrial process water and resident domestic water, in order to keep good running state of the water pump, daily detection is needed to be carried out on the working condition of the water pump, and the energy-saving and safe running state of the water pump unit is guided by quick measurement and calculation on the site of other running state parameters of the unit, so that dynamic maintenance is reasonably arranged, and in the use process of the water pump, a flowmeter is generally configured to detect the flow of the water pump. And for the water pump applied to large or important occasions, a special water pump operation monitoring system is matched to monitor the operation condition of the water pump. For agricultural or general industrial use, the related monitoring system cannot be matched for cost reasons.
For example, a "method and device for online detecting operation efficiency of water pump" disclosed in chinese patent literature, its bulletin number: CN110807231B discloses a simultaneous mathematical model comprising establishing pressure difference and flow of inlet and outlet pressure measuring points of a water pump, wherein the simultaneous mathematical model comprises a water pump flow-lift formula, a water pump flow-efficiency formula and a water pump flow formula; immediately detecting and obtaining the height difference and pressure difference data of inlet and outlet pressure measuring points of the water pump to be detected, and substituting the height difference and the pressure difference data into the simultaneous mathematical model to obtain the corresponding flow value of the water pump to be detected; substituting the corresponding flow value into the water pump flow-efficiency formula to obtain a real-time efficiency value of the tested water pump; however, this solution requires detection by sensors for flow rate, flow velocity, etc. to perform diagnosis.
Disclosure of Invention
In order to solve the problem that in the prior art, a plurality of sensors are needed to cooperate with each other in water pump work detection, the invention provides a control system for water pump anhydrous protection, and the detection of the water pump can be realized only by arranging the sensors on a motor.
In order to achieve the above object, the present invention provides the following technical solutions:
a control system for water pump anhydrous protection, comprising: the motor sensing module monitors torque current; the motor sensing module is connected with a controller, and the controller acquires torque current and power data; the controller is connected with a diagnosis module, and the diagnosis module performs water pump diagnosis according to power and efficiency and sends out an adjustment signal. Detecting torque current of a motor through a motor sensing module to obtain real-time current information of motor operation; the method comprises the steps that real-time current information of a motor sensing module is monitored through a controller, the controller controls output power of a motor, information required by a diagnosis module is determined according to the real-time current information and the output power, and the information required by the diagnosis module is sent to the diagnosis module to carry out water pump state diagnosis; the controller simulates the relevant state information of the running of the water pump according to the real-time current information and the output power, and sends the relevant state information of the running of the water pump to the diagnosis module for water pump state diagnosis; the monitoring of the water pump work does not need to set a plurality of additional sensors to monitor the flow speed and other states of the water pump, so that the water pump does not need to be provided with a plurality of related physical structures of the sensors, and the water pump is not influenced by the arrangement structures of the sensors; and after the diagnosis module is used for diagnosing the state of the water pump, the diagnosis module directly sends an adjusting signal to the controller for adjustment, the circuit logic is simple and reliable, the reliability of the controller is improved, any link in the detection or diagnosis process is failed, and the controller can still realize the safety control of the water pump.
Preferably, the diagnostic module includes a power curve model, the power curve model being determined by torque current and power data of the controller; the method comprises the step of determining the actual efficiency of the water pump motor by using an efficiency curve model. The power data is rated power, the actual power under the influence of the environment and equipment under the actual condition is determined through torque current, the power curve is determined through the rated power and the actual power, and the efficiency curve is determined through the power curve. So that the actual power of the motor in the water pump can be determined by the torque current, and the actual efficiency of the water pump can be determined according to the actual power of the motor. The actual power and the actual efficiency of the water pump can be determined without multi-sensor detection of the working water pump, and the accuracy of the actual power and the actual efficiency is only affected by the accuracy of current detection and is not affected by the actual working of the water pump and the accuracy of the sensors.
Preferably, the diagnosis module obtains torque current and power data from the controller, fits the torque current into a first curve model, uses the power data as a reference value of the first curve model, obtains a mapping relation between the power data and the first curve model, and outputs a power change curve. The diagnosis module fits a torque current curve according to the change of the torque current, determines the mapping relation between the torque current and the power, and obtains a power curve based on the torque current curve; and carrying out difference between the power curve and the reference value power data to obtain a power variation value, and fitting the power variation value into the power variation curve. The actual power of the water pump motor can be determined through the torque current, and the water pump motor is not influenced by factors such as the water pump running environment.
Preferably, the controller is provided with a power conversion module, and the power conversion module determines the outlet pressure value of the water pump according to the power curve model and sends the outlet pressure value to the diagnosis module. The power conversion module converts power into water pump working state information such as flow rate and the like, and simultaneously determines a water pump outlet pressure value according to physical parameters of the water pump to obtain the outlet pressure value of water pump working, so that reliability is diagnosed conveniently. The monitoring of the working state of the water pump without multiple sensors is realized, and the sensors used in multiple states do not need to be monitored any more through the conversion of the power conversion module, and the monitored current information takes the influence of the actual use environment and conditions into consideration, so that the obtained outlet pressure value of the water pump does not need to take additional errors into consideration.
Preferably, a diagnosis model is arranged between the power curve model and the efficiency curve model, and the diagnosis model respectively acquires characteristic points of the power curve model and the efficiency curve model and performs multi-objective diagnosis. The diagnostic model samples the curve model within a time T, wherein the time T is a sampling interval, sampling points are set at equal intervals in the sampling interval, the change rate of the sampling points and the adjacent curve model is determined, the process is repeated to obtain a change rate group, and the change rate of the change rate group, of which the repetition number exceeds M, is set as a characteristic point change rate; judging whether real-time points of the power curve model and the efficiency curve model are characteristic points according to the characteristic point change rate; and diagnosing according to the characteristic points of the power curve model and the characteristic points of the efficiency curve model, wherein the diagnosis standard is the difference value between the characteristic points and the standard value. Abnormality diagnosis of power and efficiency based on time T can be achieved.
Preferably, the motor sensing module comprises a sensor, and the sensor is connected with the motor; the sensor includes a current detection circuit that detects a torque current of the motor. The sensor comprises a conversion circuit which converts a current signal into a torque current signal, and the conversion circuit is connected with the controller. The monitoring of the water pump motor can be realized only by adding a sensing module into the motor circuit.
Preferably, the diagnosis module obtains the outlet pressure value of the water pump from the controller, performs ratio conversion on the outlet pressure value and the standard pressure value to determine an efficiency value, determines an efficiency reference value according to the actual lift, and corrects the efficiency value according to the efficiency reference value to output an efficiency change curve. The controller obtains information of working states such as the flow rate of the water pump according to the power determined by the torque current, and obtains an outlet pressure value according to physical parameters of the water pump; in addition, the controller obtains a standard pressure value of the water pump outlet according to the power information, and the diagnosis module carries out fractional operation according to the standard pressure value and the outlet pressure value to obtain an efficiency value with percentage display; the diagnosis module obtains a design pressure value according to an outlet pressure value determined by the design lift, and obtains an efficiency reference value by fractional operation according to the design pressure value and the outlet pressure value. And supplementing the efficiency value according to the efficiency reference value and fitting a final efficiency change curve. The method can determine the design requirement and the efficiency under two actual conditions, and the whole process also avoids the error and the precision influence caused by multi-sensor detection.
Preferably, the diagnosis module sends out the adjustment signal includes dividing the multi-target diagnosis result into gradient grades, and sending out the adjustment signal corresponding to different gradient grades to the controller according to the multi-target diagnosis result. Gradient grades are respectively divided for different characteristic points, each gradient grade can correspond to a plurality of characteristic points of different curves, each gradient grade corresponds to an adjusting signal, and the adjusting signal comprises an adjusting quantity. Not only can be adjusted according to efficiency, but also can be adjusted according to power.
The invention has the following advantages:
(1) The monitoring difficulty in the running process of the water pump is reduced, the detection by using multiple sensors is avoided, and meanwhile, the reliability of running diagnosis of the water pump is improved; the monitoring of the water pump work does not need to set a plurality of additional sensors to monitor the flow speed and other states of the water pump, so that the water pump does not need to be provided with a plurality of related physical structures of the sensors, and the water pump is not influenced by the arrangement structures of the sensors; (2) The method can determine the design requirement and the efficiency under two actual conditions, and the whole process also avoids the error and the precision influence caused by the detection of multiple sensors; (3) The monitoring of the working state of the water pump without multiple sensors is realized, and the sensors used in multiple states do not need to be monitored any more through the conversion of the power conversion module, and the monitored current information takes the influence of the actual use environment and conditions into consideration, so that the obtained outlet pressure value of the water pump does not need to take additional errors into consideration.
Drawings
The drawings in the following description are merely exemplary and other implementations drawings may be derived from the drawings provided without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a control system for water pump anhydrous protection in the present invention.
FIG. 2 is a schematic system diagram of a diagnostic module of the present invention.
In the figure:
1-a motor sensing module; 2-a controller; 3-a diagnostic module; 4-a power curve model; 5-an efficiency curve model; 6-diagnostic model.
Detailed Description
The following description of the embodiments of the invention is intended to be illustrative of the specific embodiments of the invention in which all other embodiments of the invention, as would be apparent to one skilled in the art without undue burden, are included in the scope of the invention.
As shown in fig. 1-2, in a preferred embodiment, the present invention discloses a control system for water pump water-free protection, comprising: the motor sensing module 1 monitors torque current; the motor sensing module 1 is connected with a controller 2, and the controller acquires torque current and power data; the controller 2 is connected with a diagnosis module 3 which performs water pump diagnosis according to power and efficiency and sends out an adjustment signal. Detecting torque current of a motor through a motor sensing module to obtain real-time current information of motor operation; the method comprises the steps that real-time current information of a motor sensing module is monitored through a controller, the controller controls output power of a motor, information required by a diagnosis module is determined according to the real-time current information and the output power, and the information required by the diagnosis module is sent to the diagnosis module to carry out water pump state diagnosis; the controller simulates the relevant state information of the running of the water pump according to the real-time current information and the output power, and sends the relevant state information of the running of the water pump to the diagnosis module for water pump state diagnosis; and after the diagnosis module is used for diagnosing the state of the water pump, the diagnosis module directly sends an adjusting signal to the controller for adjustment.
When the water pump motor is used, the motor sensing module is connected to the water pump motor to monitor the torque current of the motor, and similarly, the current information such as the working current of the water pump motor can be monitored; and then the system is connected into the water pump, the control system performs data processing and state diagnosis according to the data of the motor sensing module, the current data of the water pump motor is converted into water pump operation parameter information required by state diagnosis in the data processing process, meanwhile, the water pump operation parameter information is further converted according to the physical parameters of the water pump to obtain data of power and efficiency, the data of power and efficiency are sent to the diagnosis module for diagnosis, and the diagnosis module establishes a power curve model and an efficiency curve model and performs state diagnosis, and determines the working state of the water pump by taking the power and the efficiency as monitoring indexes.
The diagnosis module 3 comprises a power curve model 4, wherein the power curve model is determined by torque current and power data of the controller; an efficiency curve model 5 is included to determine the actual efficiency of the water pump motor. The power data is rated power, the actual power under the influence of the environment and equipment under the actual condition is determined through torque current, the power curve is determined through the rated power and the actual power, and the efficiency curve is determined through the power curve. So that the actual power of the motor in the water pump can be determined by the torque current, and the actual efficiency of the water pump can be determined according to the actual power of the motor.
When the water pump is used, the diagnosis module fits torque current or current data and power data of other water pump motors respectively to obtain a power curve and an efficiency curve of the motors in the water pump, at the moment, the power curve and the efficiency curve are fit curves and represent actual working states of the motors, and the diagnosis module determines feedback caused by actual working conditions to motor output through motor current change, so that all variables are not required to be monitored, and only the influence on the motor current is finally monitored, so that high-accuracy monitoring of water pump work is realized.
The diagnosis module obtains torque current and power data from the controller, fits the torque current into a first curve model, uses the power data as a reference value of the first curve model, obtains the mapping relation between the power data and the first curve model, and outputs a power change curve. The diagnosis module fits a torque current curve according to the change of the torque current, determines the mapping relation between the torque current and the power, and obtains a power curve based on the torque current curve; and carrying out difference between the power curve and the reference value power data to obtain a power variation value, and fitting the power variation value into the power variation curve.
When the method is used, the first curve model is a current curve, is a torque current curve or other curves similar to motor current with a fixed conversion relation with the torque current curve, then obtains actual power based on the torque current according to the conversion relation between power and the torque current, at the moment, the actual power has a difference value with standard power, obtains a power change value according to the difference value, then fits data again to obtain a power change curve related to the difference value of the actual power and the standard power, the power change curve directly represents the change value of the power relative to the standard power, and optimizes the change value as a target, namely, can skip optimizing various influencing factors to obtain total optimization.
The controller is provided with a power conversion module, and the power conversion module determines the outlet pressure value of the water pump according to the power curve model and sends the outlet pressure value to the diagnosis module. The power conversion module converts power into water pump working state information such as flow rate and the like, and simultaneously determines a water pump outlet pressure value according to physical parameters of the water pump to obtain the outlet pressure value of water pump working, so that reliability is diagnosed conveniently. The monitoring of the working state of the water pump without multiple sensors is realized, and the sensors used in multiple states do not need to be monitored any more through the conversion of the power conversion module, and the monitored current information takes the influence of the actual use environment and conditions into consideration, so that the obtained outlet pressure value of the water pump does not need to take additional errors into consideration.
When the water pump is used, the pump flow is set to be certain, and the outlet pressure value of the water pump can be determined according to the power at the moment, so that the change value of the outlet pressure of the water pump can be determined according to the power curve model, and the physical parameter monitoring of the water pump is realized.
A diagnosis model 6 is arranged between the power curve model 4 and the efficiency curve model 5, and the diagnosis model respectively acquires characteristic points of the power curve model and the efficiency curve model and performs multi-objective diagnosis. The diagnostic model samples the curve model within a time T, wherein the time T is a sampling interval, sampling points are set at equal intervals in the sampling interval, the change rate of the sampling points and the adjacent curve model is determined, the process is repeated to obtain a change rate group, and the change rate of the change rate group, of which the repetition number exceeds M, is set as a characteristic point change rate; judging whether real-time points of the power curve model and the efficiency curve model are characteristic points according to the characteristic point change rate; and diagnosing according to the characteristic points of the power curve model and the characteristic points of the efficiency curve model, wherein the diagnosis standard is the difference value between the characteristic points and the standard value.
When the method is used, the state diagnosis comprises the steps of respectively carrying out abnormality identification on the power curve and the efficiency curve, firstly identifying characteristic points in the curve, and then judging whether the characteristic points are abnormal state points or not. In order to avoid the influence of the change of the water pump working plan and reduce misjudgment and error judgment, setting a sampling interval for the curve model, performing gap sampling in the sampling interval, reclassifying the gap sampling, and determining whether the gap sampling is an abnormal state point according to the occurrence frequency of different characteristics; and the characteristic points with different occurrence frequencies are respectively marked with different abnormal grades, and then the curve data of the abnormal state points are judged, so that the diagnosis precision is greatly improved, and useless diagnosis is reduced.
The motor sensing module comprises a sensor which is connected with the motor; the sensor includes a current detection circuit that detects a torque current of the motor. The sensor comprises a conversion circuit which converts a current signal into a torque current signal, and the conversion circuit is connected with the controller.
When the intelligent water pump monitoring system is used, the sensor is connected with the water pump motor, and meanwhile the control system is connected with the controller of the water pump motor, so that intelligent control of the water pump motor is achieved, multiple sensors are not required to be arranged in the working environment of the water pump, the sensors are not required to be arranged inside and outside a waterway, intelligent control can be achieved, the intelligent water pump can be directly connected with a pipeline to work, and complexity and unreliability of intelligent water pump monitoring are reduced.
The diagnosis module obtains the outlet pressure value of the water pump from the controller, carries out ratio conversion on the outlet pressure value and the standard pressure value to determine an efficiency value, determines an efficiency reference value according to the actual lift, and corrects the efficiency value according to the efficiency reference value to output an efficiency change curve. The controller obtains information of working states such as the flow rate of the water pump according to the power determined by the torque current, and obtains an outlet pressure value according to physical parameters of the water pump; in addition, the controller obtains a standard pressure value of the water pump outlet according to the power information, and the diagnosis module carries out fractional operation according to the standard pressure value and the outlet pressure value to obtain an efficiency value with percentage display; the diagnosis module obtains a design pressure value according to an outlet pressure value determined by the design lift, and obtains an efficiency reference value by fractional operation according to the design pressure value and the outlet pressure value. And supplementing the efficiency value according to the efficiency reference value and fitting a final efficiency change curve.
When the device is used, after the outlet pressure value of the water pump is obtained according to the power data and the determined flow, the outlet pressure value according to the design requirement or the design outlet pressure value obtained by conversion of the lift is compared, so that the change of the actual outlet pressure value is determined, and the change of the working efficiency is represented.
The diagnosis module sends out the adjustment signals, which comprises dividing the multi-target diagnosis result into gradient grades, and sending out the adjustment signals corresponding to different gradient grades to the controller according to the multi-target diagnosis result. Gradient grades are respectively divided for different characteristic points, each gradient grade can correspond to a plurality of characteristic points of different curves, each gradient grade corresponds to an adjusting signal, and the adjusting signal comprises an adjusting quantity.
When the device is used, the characteristic points of the efficiency curve model and the power curve model are diagnosed, the change rate of the characteristic points and the adjacent points exceeds K to be used as abnormal characteristic points, N unit increasing gradients are carried out on the excess quantity of the relative K, each gradient is provided with an adjusting signal representing different severity levels, and the magnitude of the adjusting quantity in the adjusting signal follows the gradient change of the adjusting signal.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (8)
1. A control system for water pump anhydrous protection, comprising: the motor sensing module monitors torque current; the motor sensing module is connected with a controller, and the controller acquires torque current and power data; the controller is connected with a diagnosis module, and the diagnosis module performs water pump diagnosis according to power and efficiency and sends out an adjustment signal.
2. The control system of claim 1, wherein the diagnostic module includes a power curve model, the power curve model being determined from torque current and power data of the controller; the method comprises the step of determining the actual efficiency of the water pump motor by using an efficiency curve model.
3. The control system of claim 2, wherein the diagnostic module obtains torque current and power data from the controller, fits the torque current to a first curve model, uses the power data as a reference value of the first curve model, obtains a mapping relationship between the power data and the first curve model, and outputs a power change curve.
4. A control system for water pump water-free protection according to claim 2 or 3, wherein the controller is provided with a power conversion module, the power conversion module determines the outlet pressure value of the water pump according to a power curve model, and sends the outlet pressure value to the diagnosis module.
5. The control system for water pump anhydrous protection according to claim 1, 2 or 3, wherein a diagnosis model is arranged between the power curve model and the efficiency curve model, and the diagnosis model obtains characteristic points of the power curve model and the efficiency curve model respectively and performs multi-objective diagnosis.
6. A control system for water pump water-free protection according to claim 1, 2 or 3, wherein the motor sensing module comprises a sensor connected with the motor; the sensor includes a current detection circuit that detects a torque current of the motor.
7. The system of claim 4, wherein the diagnostic module obtains a pump outlet pressure value from the controller, performs a ratio conversion of the outlet pressure value to a standard pressure value to determine an efficiency value, determines an efficiency reference value according to an actual lift, and corrects the efficiency value according to the efficiency reference value to output an efficiency change curve.
8. The control system of claim 5, wherein the diagnostic module sends the adjustment signal to the controller by classifying the multi-objective diagnostic result into gradient levels and sending the adjustment signal corresponding to different gradient levels according to the multi-objective diagnostic result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310328441.3A CN116447119A (en) | 2023-03-30 | 2023-03-30 | Control system for water pump anhydrous protection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310328441.3A CN116447119A (en) | 2023-03-30 | 2023-03-30 | Control system for water pump anhydrous protection |
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| Publication Number | Publication Date |
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| CN116447119A true CN116447119A (en) | 2023-07-18 |
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|---|---|---|---|
| CN202310328441.3A Pending CN116447119A (en) | 2023-03-30 | 2023-03-30 | Control system for water pump anhydrous protection |
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| CN (1) | CN116447119A (en) |
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2023
- 2023-03-30 CN CN202310328441.3A patent/CN116447119A/en active Pending
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