CN113445573B - Water pump parameter self-learning method, system, equipment and computer readable storage medium - Google Patents
Water pump parameter self-learning method, system, equipment and computer readable storage medium Download PDFInfo
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- CN113445573B CN113445573B CN202110803400.6A CN202110803400A CN113445573B CN 113445573 B CN113445573 B CN 113445573B CN 202110803400 A CN202110803400 A CN 202110803400A CN 113445573 B CN113445573 B CN 113445573B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 452
- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000003860 storage Methods 0.000 title claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims abstract description 28
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/078—Combined units with different devices; Arrangement of different devices with respect to each other
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Abstract
The embodiment of the application provides a self-learning method, a system, equipment and a computer readable storage medium for water pump parameters, which are used for generating water pump characteristic parameters in a water supply system, wherein the water supply system comprises a motor and a water pump driven by the motor to operate, and the method is characterized by comprising the following steps of before the water supply system is put into use: controlling the operation of the motor at a plurality of motor frequencies, respectively; sequentially controlling an electric regulating valve at the water outlet of the water pump to be opened according to a plurality of valve openings at the frequency of each motor, and acquiring state parameters of the water supply system under the plurality of valve openings; and generating a water pump characteristic parameter of each motor frequency according to the state parameters of the water supply system under the opening degrees of the plurality of valves. According to the embodiment of the application, the characteristic parameters of the water pump are obtained in a self-learning mode before the water supply system is put into use, so that the cost of the water supply system is reduced, and the water supply control precision is improved.
Description
Technical Field
The embodiment of the application relates to the field of water supply, in particular to a water pump parameter self-learning method, a system, equipment and a computer readable storage medium.
Background
The current constant pressure/constant flow water supply system mostly adopts a combination mode of a sensor, a frequency converter, a motor and a water pump, takes analog quantity collected by a pressure sensor/flow sensor arranged at a water outlet of the water pump as a pressure feedback value/flow feedback value, and then keeps the water pressure/flow of the water outlet of the current water pump near a set value through a PID (proportion integration differentiation) and other control algorithms. As the sensor is used as an electronic component and has the possibility of failure, once the sensor in a water pump system pipeline fails, the water pump system cannot acquire an accurate pressure value, so that certain influence and even danger are brought to production and life, and the cost of the constant-pressure water supply system is increased due to the use of the sensor.
At present, in order to avoid the water supply system out of control caused by sensor failure, a more common scheme is to manually collect and calibrate the water pump parameters of a certain specific water pump system, then write the water pump parameters into a control program, estimate the water pressure/flow of the water outlet of the water pump according to the water pump parameters in the actual constant pressure/constant flow control process, simulate the feedback value of a pressure sensor/flow sensor according to the water pressure/flow, and realize constant pressure/constant flow control by using control algorithms such as PID.
However, in the above scheme, the calibration process of the water pump parameter is time-consuming and labor-consuming, and has high cost, so that the water pump parameter is difficult to be applied on a large scale. In addition, certain misoperation may exist in the existing manual acquisition and calibration process, so that pressure/flow estimation is inaccurate, and constant pressure/constant flow control accuracy is low; in addition, when the calibration environment is severe, manual collection and calibration have certain dangers.
Disclosure of Invention
The embodiment of the application provides a self-learning method, a self-learning system, self-learning equipment and a computer-readable storage medium for water pump parameters, aiming at the problems that the water supply system is out of control due to the failure of a sensor, the manual acquisition of calibration water pump parameters in a sensorless water supply system is time-consuming and labor-consuming, the precision is insufficient and the acquisition has a certain danger in a specific environment.
The technical scheme for solving the technical problems is that the self-learning method for the parameters of the water pump is provided, and is used for generating the characteristic parameters of the water pump in a water supply system, wherein the water supply system comprises a motor and the water pump driven by the motor to operate, and the method comprises the following steps of before the water supply system is put into use:
controlling the operation of the motor at a plurality of motor frequencies, respectively;
sequentially controlling an electric regulating valve at the water outlet of the water pump to be opened according to a plurality of valve openings at the frequency of each motor, and acquiring state parameters of the water supply system under the plurality of valve openings;
and generating a water pump characteristic parameter of each motor frequency according to the state parameters of the water supply system under the opening degrees of the plurality of valves.
As a further optimization of the embodiment of the application, the state parameters of the water supply system comprise motor frequency, motor power and water outlet pressure of the water pump;
the water pump characteristic parameter is used for constant-pressure water supply control of the water supply system in a state without a pressure sensor, and is formed by a curve relationship between water pressure of a water outlet and motor power under corresponding motor frequency;
generating a water pump characteristic parameter of each motor frequency according to the state parameters of the water supply system under the opening degrees of the plurality of valves, wherein the water pump characteristic parameter comprises:
under the same motor frequency, if the motor power corresponding to N different valve openings is the same and the water outlet water pressure is different, obtaining an arithmetic average value of the motor power corresponding to the N different valve openings and an arithmetic average value of the water outlet water pressure corresponding to the N different valve openings, wherein N is an integer greater than or equal to 2;
and replacing the motor power and the water outlet water pressure corresponding to the N different valve openings with the arithmetic average value of the motor power and the arithmetic average value of the water outlet water pressure to generate a water pump characteristic parameter corresponding to the motor frequency.
As a further optimization of the embodiment of the application, the state parameters of the water supply system comprise motor frequency, motor power and water outlet flow of the water pump;
the water pump characteristic parameter is used for constant-current water supply control of the water supply system under the state of no pressure sensor, and is formed by a curve relationship between water outlet flow and motor power under the corresponding motor frequency;
generating a water pump characteristic parameter of each motor frequency according to the state parameters of the water supply system under the opening degrees of the plurality of valves, wherein the water pump characteristic parameter comprises:
under the same motor frequency, if the motor power corresponding to N different valve openings is the same and the water outlet flow is different, obtaining an arithmetic average value of the motor power corresponding to the N different valve openings and an arithmetic average value of the water outlet flow corresponding to the N different valve openings, wherein N is an integer greater than or equal to 2;
and replacing the motor power and the water outlet flow corresponding to the N different valve openings with the arithmetic average value of the motor power and the arithmetic average value of the water outlet flow to generate a water pump characteristic parameter corresponding to the motor frequency.
As a further optimization of an embodiment of the present application, the method further includes:
displaying the state parameters of the water supply system through a graphical user interface;
and importing the state parameters of the water supply system according to the input information of the input device.
The application also provides a water pump parameter self-learning system which is used for generating water pump characteristic parameters in a water supply system, wherein the water supply system comprises a motor and a water pump driven by the motor to operate, the water pump parameter self-learning system comprises a motor controller, an upper computer, a sensor and an electric regulating valve, wherein the sensor and the electric regulating valve are arranged at a water outlet of the water pump, and the motor controller is respectively connected with the upper computer, the sensor and the electric regulating valve;
the motor controller is used for controlling the motor to run at a plurality of motor frequencies respectively according to instructions of the upper computer before the water supply system is put into use, and controlling an electric regulating valve at a water outlet of the water pump to be opened according to a plurality of valve openings in sequence at each motor frequency, and acquiring state parameters of the water supply system under the plurality of valve openings;
the upper computer is used for sending an instruction to the motor controller before the water supply system is put into use, and generating a water pump characteristic parameter of each motor frequency according to the state parameters of the water supply system under the opening degrees of the plurality of valves from the motor controller.
As a further optimization of the embodiment of the application, the state parameters of the water supply system comprise motor frequency, motor power and water outlet pressure of the water pump;
the water pump characteristic parameter is used for constant-pressure water supply control of the water supply system in a state without a pressure sensor, and is formed by a curve relationship between water pressure of a water outlet and motor power under corresponding motor frequency;
under the same motor frequency, if the motor power corresponding to N different valve openings is the same and the water outlet water pressure is different, N is an integer greater than or equal to 2, the upper computer obtains the arithmetic average value of the motor power corresponding to the N different valve openings and the arithmetic average value of the water outlet water pressure corresponding to the N different valve openings, and replaces the motor power and the water outlet water pressure corresponding to the N different valve openings with the arithmetic average value of the motor power and the arithmetic average value of the water outlet water pressure to generate the water pump characteristic parameters corresponding to the motor frequency.
As a further optimization of the embodiment of the application, the state parameters of the water supply system comprise motor frequency, motor power and water outlet flow of the water pump;
the water pump characteristic parameter is used for constant-current water supply control of the water supply system under the state of no pressure sensor, and is formed by a curve relationship between water outlet flow and motor power under the corresponding motor frequency;
under the same motor frequency, if the motor power corresponding to N different valve openings is the same and the water outlet flow is different, N is an integer greater than or equal to 2, the upper computer obtains the arithmetic average value of the motor power corresponding to the N different valve openings and the arithmetic average value of the water outlet flow corresponding to the N different valve openings, and replaces the motor power and the water outlet flow corresponding to the N different valve openings with the arithmetic average value of the motor power and the arithmetic average value of the water outlet flow to generate the water pump characteristic parameters corresponding to the motor frequency.
As a further optimization of the embodiment of the present application, the upper computer includes a graphical user interface, and the graphical user interface display area and the data import area, wherein:
the display area is used for displaying the state parameters of the water supply system;
the data importing area is used for importing the state parameters of the water supply system according to the input information of the input device.
The embodiment of the application also provides water pump parameter self-learning equipment, which comprises a first memory and a first processor which are positioned on an upper computer, and a second memory and a second processor which are positioned on a motor controller, wherein the first memory stores a computer program which can be executed in the first processor, the second memory stores a computer program which can be executed in the second processor, and the steps of the water pump parameter self-learning method are realized when the first processor and the second processor execute the computer program.
Embodiments of the present application also provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the steps of the water pump parameter self-learning method as described above.
The embodiment of the application has the following technical effects: before the water supply system is put into use, the water pump characteristic parameters are obtained in a self-learning mode, so that the water supply system can utilize the water pump characteristic parameters obtained in the self-learning process to carry out water supply control, the cost of the water supply system is reduced, and the water supply control precision is improved.
Drawings
FIG. 1 is a schematic flow chart of a self-learning method for parameters of a water pump according to an embodiment of the present application;
fig. 2 is a schematic flow chart of acquiring state parameters of a water supply system under a plurality of valve openings in the self-learning method of water pump parameters according to the embodiment of the application;
FIG. 3 is a flow chart of a method for self-learning parameters of a water pump according to another embodiment of the present application;
FIG. 4 is a schematic diagram of a water pump parameter self-learning system according to an embodiment of the present application;
fig. 5 is a schematic diagram of a self-learning device for water pump parameters according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The application provides a water pump parameter self-learning method, which can be applied to a water supply system and can generate water pump characteristic parameters in the water supply system before the water supply system is put into use. Referring to fig. 4, the water supply system includes a motor 42 and a water pump 43 driven by the motor 42, and when the water supply system is used for constant pressure water supply, the self-learning method also needs to install a pressure sensor 44 and an electric regulating valve 46 at the water outlet of the water pump 43; when the water supply system is used for constant-flow water supply, the self-learning method also needs to install a flow sensor 45 and an electric regulating valve 46 at the water outlet of the water pump 43. Wherein an electrically operated regulating valve 46 is mounted on the general branch of the water outlet of the water pump 43 and is located after the pressure sensor 44/flow sensor 45.
In particular, the motor 42 may be an integrated machine comprising a frequency converter, a programmable logic controller (Programmable Logic Controller, PLC) and a motor. Of course, in practical application, a frequency converter, a programmable logic controller and a motor can be used instead of the integrated machine. The electrically-operated regulator valve 46, the pressure sensor 44/the flow sensor 45 are respectively connected with a programmable logic controller, and the programmable logic controller can send control signals to the electrically-operated regulator valve 46 and obtain sampling data from the pressure sensor 44/the flow sensor 45.
Referring to fig. 1, the self-learning method for the parameters of the water pump according to the present embodiment may be implemented in conjunction with an upper computer 41 communicatively connected to a motor 42, and the method is performed before the water supply system is put into use. The programmable logic controller of the motor 42 communicates with the upper computer 41 in a serial port manner, the upper computer 41 can be developed based on a windows system, and a graphical user interface of the whole upper computer can be divided into a display area, a parameter setting area, a data storage area, a data importing area and the like. Specifically, the self-learning method for the parameters of the water pump in the embodiment includes the following steps:
step S11: the motor 42 is controlled to operate at a plurality of motor frequencies, and the motor 42 drives the water pump 43 to operate, so that the water outlet of the water pump 43 is discharged.
The motor frequency may be preset by the upper computer 41, and covers the lowest operating frequency to the rated frequency of the motor 42 (for example, the plurality of motor frequencies may be set in an equal step manner between the lowest operating frequency and the rated frequency of the motor 42), and the more the preset motor frequency, the higher the control accuracy after the water supply system is put into use.
Specifically, after the motor frequency is set on the upper computer 41, the motor frequency is sent to the programmable logic controller by the upper computer 41, and then the frequency converter controls the motor to run at the preset motor frequency according to the signal of the programmable logic controller. The manner in which the motor 42 is controlled is conventional in the art and will not be described in detail herein.
Step S12: at each motor frequency, i.e. when the motor operates at each motor frequency, the programmable logic controller sequentially controls the electric regulating valve 46 at the water outlet of the water pump 43 to be opened according to a plurality of valve openings, and obtains the state parameters of the water supply system under each valve opening. The state parameters of the water supply system can be obtained by specifically acquiring signals of a frequency converter and output signals of the pressure sensor 44/flow sensor 45.
Specifically, the valve opening is also preset on the upper computer 41, and is sent by the upper computer 41 to be a programmable logic controller. The valve opening ranges from full closing to full opening of the electrically operated valve 46 (for example, the valve openings may be set in an equal step manner between full closing and full opening of the electrically operated valve 46), and the greater the valve opening is, the higher the control accuracy after the water supply system is put into use.
Step S13: and generating a water pump characteristic parameter of each motor frequency according to the state parameters of the water supply system under the opening degrees of the plurality of valves. Namely, after confirming that the state parameters corresponding to all the valve openings under a certain motor frequency are collected, the water pump characteristic parameters under the motor frequency can be calculated according to a set operation algorithm (such as a least square method), and the water pump characteristic parameters can be in a form of a table.
The step is executed by the upper computer 41, and the programmable logic controller can send the acquired state parameters of the water supply system to the upper computer 41 through the serial port. In practical applications, if the function of the programmable logic controller is relatively powerful, the steps may be directly executed by the programmable logic controller.
The characteristic parameters of the water pump can be written into the EEPROM of the frequency converter by the programmable logic controller, so that the self-learning of the parameters of the water pump is completed, and the electric regulating valve 46, the pressure sensor 44 and the flow sensor 45 can be removed at the moment, so that the water supply system can be normally put into use.
After the water supply system is formally put into use (at this time, the pressure sensor 44/flow sensor 45 is removed), the frequency converter can use the characteristic parameter of the water pump instead of the feedback signal of the sensor as a feedback value of PID regulation to drive the water pump to perform water supply control.
According to the self-learning method for the water pump parameters, the water pump characteristic parameters are obtained in a self-learning mode before the water supply system is put into use, so that the water supply system can utilize the water pump characteristic parameters obtained by self-learning to carry out water supply control in the use process, the cost of the water supply system is reduced, and the water supply control precision is improved.
In one embodiment of the present application, the water supply system can realize constant pressure water supply in normal use, and accordingly, the state parameters of the water supply system under the plurality of valve openings obtained in step S12 include the motor frequency, the motor power and the water outlet pressure of the water pump 43, wherein the motor frequency and the motor power can be directly obtained from the frequency converter, and the water outlet pressure can be obtained from the pressure sensor 44 of the water outlet of the water pump 43. The collection mode of the motor frequency, the motor power and the water pressure of the water outlet belongs to the conventional technology in the field, and is not repeated here.
Correspondingly, the water pump characteristic parameter is used for constant-pressure water supply control of the water supply system in the state without a pressure sensor (namely in the normal use process), and the water pump characteristic parameter is formed by a curve relationship (the curve relationship can be expressed by a table) between water pressure of a water outlet and motor power under the corresponding motor frequency.
When the water supply system is formally put into use, the frequency converter and the programmable logic controller automatically acquire the frequency and the power of the motor which are currently operated, then the water pressure of the water outlet of the current water pump is obtained according to the characteristic parameters of the water pump, the water pressure is used as a feedback value regulated by the PID, and the difference between the fed-back water pressure and the set pressure is reduced by regulating the operating frequency of the frequency converter until the water pressure of the water outlet of the water pump is stabilized near the set pressure, so that constant-pressure water supply is realized.
Referring to fig. 2, in an embodiment of the present application, step S13 in fig. 1, that is, generating the water pump characteristic parameter of each motor frequency according to the state parameters of the water supply system under the plurality of valve openings, may include:
step S131: judging whether N motors corresponding to different valve openings have the same power and different water pressures at water outlets under the same motor frequency, wherein N is an integer greater than or equal to 2. If the motor power corresponding to the N different valve openings is the same and the water pressure of the water outlet is different, the data acquired by the pressure sensor is wrong, the step S132 is executed, and otherwise, the step S134 is executed.
Step S132: and obtaining an arithmetic average value of motor power corresponding to N different valve openings and an arithmetic average value of water pressure of a water outlet corresponding to N different valve openings, and then executing step S133.
Step S133: the arithmetic average value of the motor power and the arithmetic average value of the water pressure of the water outlet replace the motor power and the water pressure of the water outlet corresponding to N different valve openings, and the motor power and the water pressure of the water outlet corresponding to other valve openings are used for generating the water pump characteristic parameters corresponding to the motor frequency, namely, the motor power and the water pressure of the water outlet corresponding to N different valve openings are not considered when the water pump characteristic parameters are generated.
Step S134: and generating a water pump characteristic parameter corresponding to the motor frequency according to the motor power and the water outlet water pressure corresponding to the opening of all the valves.
Through the steps S131-S134, inaccuracy of the characteristic parameters of the water pump caused by errors of the water pressure collected by the pressure sensor can be reduced, and the arithmetic average value of the power of the N motors and the arithmetic average value of the water pressure of the N water outlets are used for replacing original state data to acquire the characteristic parameters of the water pump, so that the accuracy of the characteristic parameters of the water pump is greatly improved, and the accuracy of the subsequent constant-pressure water supply of the water supply system is greatly improved.
In another embodiment of the present application, the water supply system can realize constant flow water supply, and accordingly, the state parameters obtained by the programmable logic controller in step S12 include the motor frequency, the motor power, and the water outlet flow of the water pump, wherein the motor frequency and the motor power can be directly obtained from the frequency converter, and the water outlet flow can be obtained from the flow sensor 45 of the water outlet of the water pump 43. The collection mode of the motor frequency, the motor power and the water outlet flow belongs to the conventional technology in the field, and is not repeated here.
Correspondingly, the water pump characteristic parameter is used for constant-current water supply control of the water supply system in the state without a flow sensor (namely in the normal use process), and the water pump characteristic parameter is formed by a curve relationship (the curve relationship can be expressed by a table) between the water outlet flow and the motor power under the corresponding motor frequency.
Similarly, to avoid an error in the output of the flow sensor 45, if the motor power corresponding to N different valve openings is the same and the water outlet flow rate is different at the same motor frequency, an arithmetic average value of the motor power corresponding to N different valve openings and an arithmetic average value of the water outlet flow rate corresponding to N different valve openings are obtained, where N is an integer greater than or equal to 2; and then, replacing the motor power and the water outlet flow corresponding to N different valve openings with the arithmetic average value of the motor power and the arithmetic average value of the water outlet flow to generate the water pump characteristic parameters corresponding to the motor frequency, thereby improving the accuracy of the water pump characteristic parameters.
Fig. 3 is a schematic flow chart of a water pump parameter self-learning method according to another embodiment of the application. The method can be used before the water supply system is formally used, and the method comprises the following steps:
step S301: the upper computer sets the valve opening and the motor frequency.
In the step, the electric regulating valve is divided into a plurality of valve openings (namely opening gradients) from full closing to full opening according to the requirements of customers, and the division of the valve openings can be recommended according to the characteristics of the electric regulating valve; similarly, the operating frequency of the frequency converter is divided into a number of motor frequencies, the number of motor frequencies being recommended according to customer control accuracy requirements. The valve opening and the motor frequency setting number can be set on an upper computer interface.
Step S302: the upper computer sends the valve opening and the motor frequency (initial motor frequency) to the programmable logic controller.
Specifically, after the valve opening and the motor frequency are set, a start button is clicked on the interface of the upper computer, and the upper computer transmits a starting command, the motor frequency and the valve opening to the programmable logic controller.
Step S303: the programmable logic controller transmits the motor frequency to the frequency converter through internal communication, and the frequency converter controls the motor to run at the set motor frequency so as to drive the water pump to run.
Step S304: and the programmable logic controller transmits the valve opening to the electric regulating valve to control the electric regulating valve to be opened according to the set valve opening.
Step S305: when the water supply system runs to a stable state, the programmable logic controller records and collects data such as motor frequency, motor power, water outlet water pressure/water outlet flow and the like, and the data is sent to the upper computer through serial communication. The upper computer receives the data, displays and stores the data, and sends a storage completion mark to the programmable logic controller after the storage is completed.
Step S306: the programmable logic controller determines whether all valve openings have been executed, if yes, step S308 is executed, otherwise step S307 is executed.
Step S307: the programmable logic controller updates the valve opening, sends the updated valve opening to the electric regulating valve, and then executes step S304 to enable the electric regulating valve to be opened according to the updated valve opening.
Step S308: the upper computer determines whether all the state parameters of the water supply system corresponding to the motor frequency have been collected, if yes, step S310 is executed, otherwise step S309 is executed.
Step S309: the upper computer updates the motor frequency, and sends the updated motor frequency to the programmable logic controller, and then step S303 is executed, where the programmable logic controller sends the updated motor frequency to the frequency converter for execution.
Step S310: the upper computer generates water pump characteristic parameters according to the state data of the water supply system, the water pump characteristic parameters are transmitted to the programmable logic controller through serial communication, and the water pump characteristic parameters are written into the EEPROM of the frequency converter by the Ke-programmable Ruiji controller, so that the water supply data self-calibration work is completed. Wherein the step of generating the water pump characteristic parameter according to the state data of the water supply system may be operated before the step S308.
In one embodiment of the present application, the water supply parameter self-learning method of the present application further comprises: the upper computer displays the state parameters of the water supply system through a graphical user interface, namely the state parameters obtained in the step S12 or the step S305; and modifying the state parameters of the water supply system according to the input information of the input device (for example, the state parameters can be exported first and imported after the modification is completed, thereby completing the modification). Accordingly, in step S13 or step S310, the water pump characteristic parameter may be generated according to the modified state parameter.
By the mode, the user can adjust the state parameters according to the field environment, so that the accuracy of the characteristic parameters of the water pump is further improved.
Referring to fig. 4, the embodiment of the application further provides a self-learning system for generating a water pump characteristic parameter in a water supply system, wherein the water supply system comprises a motor 42 and a water pump 43 driven by the motor 42 to operate. The water pump parameter self-learning system of the embodiment comprises a motor controller, an upper computer 41, and a sensor and an electric regulating valve 46 which are installed on a water outlet of the water pump 43, wherein the motor controller is respectively connected with the upper computer 41, the sensor and the electric regulating valve 46. Specifically, the motor controller described above may be integral with the motor 42 and include a frequency converter and a programmable logic controller.
The motor controller in this embodiment is configured to control the motor 42 to operate at a plurality of motor frequencies according to an instruction of the host computer, and sequentially control the electric control valve 46 at the water outlet of the water pump 43 to open according to a plurality of valve openings at each motor frequency, and obtain the state parameters of the water supply system under the plurality of valve openings.
The upper computer 41 is configured to send an instruction to the motor controller, and generate a water pump characteristic parameter for each motor frequency according to the state parameters of the water supply system under the plurality of valve openings from the motor controller.
In one embodiment of the application, the state parameters of the water supply system include motor frequency, motor power, and water outlet pressure of the water pump 43;
correspondingly, the water pump characteristic parameter is used for constant-pressure water supply control of the water supply system under the state of no pressure sensor, and the water pump characteristic parameter is formed by a curve relationship between water outlet water pressure and motor power under the corresponding motor frequency.
In order to reduce the defect of the precision of the characteristic parameters of the water pump caused by the output errors of the pressure sensor, in one embodiment of the application, if the motor power corresponding to N different valve openings is the same and the water outlet water pressure is different under the same motor frequency, N is an integer greater than or equal to 2, the upper computer obtains the arithmetic average value of the motor power corresponding to the N different valve openings and the arithmetic average value of the water outlet water pressure corresponding to the N different valve openings, and replaces the motor power corresponding to the N different valve openings and the water outlet water pressure with the arithmetic average value of the motor power and the arithmetic average value of the water outlet water pressure to generate the characteristic parameters of the water pump corresponding to the motor frequency.
In another embodiment of the present application, the status parameters of the water supply system include motor frequency, motor power, and water outlet flow of the water pump 43;
correspondingly, the water pump characteristic parameter is used for constant-current water supply control of the water supply system under the state of no flow sensor, and the water pump characteristic parameter is formed by a curve relationship between the water outlet flow and the motor power under the corresponding motor frequency.
Similarly, in order to reduce the accuracy deficiency of the characteristic parameters of the water pump caused by the output error of the flow sensor, in one embodiment of the application, if the motor power corresponding to the N different valve openings is the same and the water outlet flow is different under the same motor frequency, N is an integer greater than or equal to 2, the upper computer obtains the arithmetic average value of the motor power corresponding to the N different valve openings and the arithmetic average value of the water outlet flow corresponding to the N different valve openings, and replaces the motor power and the water outlet flow corresponding to the N different valve openings with the arithmetic average value of the motor power and the arithmetic average value of the water outlet flow to generate the characteristic parameters of the water pump corresponding to the motor frequency.
The water pump parameter self-learning system in the present embodiment belongs to the same concept as the water pump parameter self-learning method in the corresponding embodiments in fig. 1-3, the specific implementation process is detailed in the corresponding method embodiment, and the technical features in the method embodiment are correspondingly applicable in the system embodiment, and are not repeated here.
As shown in fig. 5, the embodiment of the present application further provides a self-learning device for water pump parameters, which includes a first memory 51 and a first processor 52 located in the upper computer 5, a second memory 61 and a second processor 62 located in the motor controller 6 (the motor controller may be integrated with the motor and include a frequency converter and a programmable logic controller), wherein the first memory 51 stores a computer program executable in the first processor 52, the second memory 61 stores a computer program executable in the second processor 62, and the first processor 52 and the second processor 62 implement the steps of the self-learning method for water pump parameters as described above when executing the computer program.
The water pump parameter self-learning device in this embodiment and the water pump parameter self-learning method in the corresponding embodiments of fig. 1-3 belong to the same concept, the specific implementation process is detailed in the corresponding method embodiment, and the technical features in the method embodiment are correspondingly applicable in the device embodiment, and are not repeated here.
One embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the water pump parameter self-learning method as described above.
The computer readable storage medium in this embodiment belongs to the same concept as the water pump parameter self-learning method in the corresponding embodiment in fig. 1-3, the specific implementation process is detailed in the corresponding method embodiment, and the technical features in the method embodiment are correspondingly applicable in the storage medium embodiment, which is not repeated here.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present application.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed method and apparatus for self-learning parameters of a water pump may be implemented in other manners.
The present application may be implemented by implementing all or part of the procedures in the methods of the embodiments described above, or by instructing the relevant hardware by a computer program, which may be stored in a computer readable storage medium, and which when executed by a processor, may implement the steps of the embodiments of the methods described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or interface switching device, recording medium, USB flash disk, removable hard disk, magnetic disk, optical disk, computer Memory, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), electrical carrier wave signals, telecommunications signals, and software distribution media, among others, capable of carrying the computer program code. It should be noted that the computer readable medium may include content that is subject to appropriate increases and decreases as required by jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is not included as electrical carrier signals and telecommunication signals.
The embodiments of the present application have been described in detail with reference to the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application. Furthermore, embodiments of the application and features of the embodiments may be combined with each other without conflict.
Claims (6)
1. A self-learning method for water pump parameters, for generating water pump characteristic parameters in a water supply system, the water supply system comprising a motor and a water pump operated by the motor, characterized in that the method comprises, before the water supply system is put into use:
controlling the operation of the motor with a plurality of motor frequencies respectively, wherein the plurality of motor frequencies cover the lowest operation frequency to rated frequency of the motor;
sequentially controlling an electric regulating valve at the water outlet of the water pump to be opened according to a plurality of valve openings at the frequency of each motor, and acquiring state parameters of the water supply system under the plurality of valve openings, wherein the plurality of valve openings cover all-closed to all-open of the electric regulating valve;
generating a water pump characteristic parameter corresponding to each motor frequency according to the state parameters of the water supply system under the opening degrees of the plurality of valves;
the state parameters of the water supply system comprise motor frequency, motor power and water outlet water pressure of the water pump, the water pump characteristic parameters are used for constant pressure water supply control of the water supply system in a state without a pressure sensor, and the water pump characteristic parameters are formed by curve relations between the water outlet water pressure and the motor power under the corresponding motor frequency; generating a water pump characteristic parameter of each motor frequency according to the state parameters of the water supply system under the opening degrees of the plurality of valves, wherein the water pump characteristic parameter comprises: under the same motor frequency, if the motor power corresponding to N different valve openings is the same and the water outlet water pressure is different, obtaining an arithmetic average value of the motor power corresponding to the N different valve openings and an arithmetic average value of the water outlet water pressure corresponding to the N different valve openings, wherein N is an integer greater than or equal to 2; replacing the motor power and the water outlet water pressure corresponding to the N different valve openings with the arithmetic average value of the motor power and the arithmetic average value of the water outlet water pressure to generate a water pump characteristic parameter corresponding to the motor frequency; or alternatively, the process may be performed,
the state parameters of the water supply system comprise motor frequency, motor power and water outlet flow of the water pump; the water pump characteristic parameter is used for constant-current water supply control of the water supply system under the state of no pressure sensor, and is formed by a curve relationship between water outlet flow and motor power under the corresponding motor frequency; generating a water pump characteristic parameter of each motor frequency according to the state parameters of the water supply system under the opening degrees of the plurality of valves, wherein the water pump characteristic parameter comprises: under the same motor frequency, if the motor power corresponding to N different valve openings is the same and the water outlet flow is different, acquiring an arithmetic average value of the motor power corresponding to the N different valve openings and an arithmetic average value of the water outlet flow corresponding to the N different valve openings; and replacing the motor power and the water outlet flow corresponding to the N different valve openings with the arithmetic average value of the motor power and the arithmetic average value of the water outlet flow to generate a water pump characteristic parameter corresponding to the motor frequency.
2. The method of claim 1, further comprising:
displaying the state parameters of the water supply system through a graphical user interface;
and importing the state parameters of the water supply system according to the input information of the input device.
3. The self-learning system for the water pump parameters is used for generating the water pump characteristic parameters in a water supply system, and the water supply system comprises a motor and a water pump driven by the motor to operate, and is characterized by comprising a motor controller, an upper computer, a sensor and an electric regulating valve, wherein the sensor and the electric regulating valve are installed at a water outlet of the water pump, and the motor controller is respectively connected with the upper computer, the sensor and the electric regulating valve;
the motor controller is used for controlling the motor to operate according to a plurality of motor frequencies according to instructions of the upper computer before the water supply system is put into use, wherein the plurality of motor frequencies cover the lowest operating frequency of the motor to the rated frequency, and at each motor frequency, an electric regulating valve positioned at a water outlet of the water pump is sequentially controlled to be opened according to a plurality of valve openings, and state parameters of the water supply system under the plurality of valve openings are obtained, and the plurality of valve openings cover the full closing to the full opening of the electric regulating valve;
the upper computer is used for sending an instruction to the motor controller before the water supply system is put into use and generating a water pump characteristic parameter of each motor frequency according to the state parameters of the water supply system under the opening degrees of the plurality of valves from the motor controller;
the state parameters of the water supply system comprise motor frequency, motor power and water outlet water pressure of the water pump, the water pump characteristic parameters are used for constant pressure water supply control of the water supply system in a state without a pressure sensor, and the water pump characteristic parameters are formed by curve relations between the water outlet water pressure and the motor power under the corresponding motor frequency; under the same motor frequency, if the motor power corresponding to N different valve openings is the same and the water outlet water pressure is different, N is an integer greater than or equal to 2, the upper computer obtains the arithmetic average value of the motor power corresponding to the N different valve openings and the arithmetic average value of the water outlet water pressure corresponding to the N different valve openings, and replaces the motor power and the water outlet water pressure corresponding to the N different valve openings with the arithmetic average value of the motor power and the arithmetic average value of the water outlet water pressure to generate a water pump characteristic parameter corresponding to the motor frequency; or alternatively, the process may be performed,
the state parameters of the water supply system comprise motor frequency, motor power and water outlet flow of the water pump; the water pump characteristic parameter is used for constant-current water supply control of the water supply system under the state of no pressure sensor, and is formed by a curve relationship between water outlet flow and motor power under the corresponding motor frequency; under the same motor frequency, if the motor power corresponding to N different valve openings is the same and the water outlet flow is different, the upper computer obtains the arithmetic average value of the motor power corresponding to the N different valve openings and the arithmetic average value of the water outlet flow corresponding to the N different valve openings, and replaces the motor power and the water outlet flow corresponding to the N different valve openings with the arithmetic average value of the motor power and the arithmetic average value of the water outlet flow to generate the characteristic parameters of the water pump corresponding to the motor frequency.
4. The system of claim 3, wherein the host computer comprises a graphical user interface, and the graphical user interface displays an area and a data import area, wherein:
the display area is used for displaying the state parameters of the water supply system;
the data importing area is used for importing the state parameters of the water supply system according to the input information of the input device.
5. The self-learning device for the parameters of the water pump comprises a first memory and a first processor which are positioned on an upper computer, and a second memory and a second processor which are positioned on a motor controller, wherein the first memory stores a computer program which can be executed in the first processor, the second memory stores a computer program which can be executed in the second processor, and the steps of the self-learning method for the parameters of the water pump are realized when the first processor and the second processor execute the computer program.
6. A computer-readable storage medium storing computer-executable instructions for causing a computer to perform the steps of the water pump parameter self-learning method according to any one of claims 1 to 2.
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