CN112922821B - Control method, device and system for self-adaptive adjustment of water pump proportional valve - Google Patents
Control method, device and system for self-adaptive adjustment of water pump proportional valve Download PDFInfo
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- CN112922821B CN112922821B CN202110215156.1A CN202110215156A CN112922821B CN 112922821 B CN112922821 B CN 112922821B CN 202110215156 A CN202110215156 A CN 202110215156A CN 112922821 B CN112922821 B CN 112922821B
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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
- F04B49/22—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 by means of valves
- F04B49/225—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 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
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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
- F04B49/08—Regulating by delivery pressure
Abstract
The invention relates to a control method, a device and a system for self-adaptive adjustment of a water pump proportional valve, belonging to the field of loading control of sanitation trucks, wherein the control method comprises the following steps: controlling a proportional valve of a water pump to be opened according to a cleaning operation mode selected by a user, and enabling the proportional valve to respond with a set initial water pressure value; when the washing and sweeping equipment is powered on for the first time or the operation mode is switched, the opening degree of the proportional valve is gradually and slowly adjusted in a step mode by combining feedback information of the sensor and an adaptive adjusting method. The control method is reasonable, manual intervention in the proportional valve adjusting process is not needed, the working efficiency is improved, and the problem that cleaning operation may hurt passers-by due to unreasonable proportional valve adjustment is solved.
Description
Technical Field
The invention belongs to the field of sanitation truck loading control, and particularly relates to a control method, device and system for self-adaptive adjustment of a water pump proportional valve.
Background
With the emphasis and enhancement of atmospheric pollution control in various cities, sanitation trucks have been developed vigorously, and in sanitation trucks using waterway systems, such as watering trucks and sweeping trucks, a proportional valve for controlling the water outlet of a water pump (referred to as a water pump proportional valve for short) is an important waterway control component which can not only open and close the waterway of the water outlet of the water pump, but also adjust the water volume to adapt to different operating environments.
The traditional sanitation vehicle has different requirements on water spraying strength in different operation scenes and modes, the water pump proportional valve adjusting method of the sanitation vehicle is a passive response method for setting corresponding output values for different operation scenes, a fixed proportional valve opening value is set in each scene (namely, the mode), after water is discharged from a water pump, repeated manual intervention is needed according to the actual application effect, the adjusting degree can only be set according to the experience of workers, if the experience of the workers is insufficient, the opening degree is adjusted too large or too small, and the road is not suitable for the actually cleaned road, so that the road cleaning effect is reduced. If the opening is adjusted to be too large, water impacts stones on the ground due to too large water pressure, so that the stones may fly and collide randomly, and pedestrians on the road may be injured.
In addition, a general small-sized sweeper is only provided with one worker, when a road surface is cleaned, after the proportional valve opening degree is set in a certain specific mode, the spray gun needs to be held by hand to carry out sweeping operation, if the proportional valve opening degree is adjusted, the sweeper can only stop working in the hand and adjust the proportional valve opening degree in the vehicle without help, and the working efficiency is reduced.
In summary, in the prior art, in an operation environment without cooperation of multiple persons and under complex road conditions of different cities, the problems of inconvenience and unreasonable operation of the proportional valve adjustment and low working efficiency exist.
Disclosure of Invention
The invention aims to provide a control method, a control device and a control system for self-adaptive adjustment of a proportional valve of a water pump, which are used for solving the problems that the working efficiency is reduced due to the fact that the proportional valve is inconvenient to adjust and the cleaning operation is likely to damage passers-by due to the fact that the proportional valve is unreasonable to adjust in the prior art.
Based on the purpose, the technical scheme I of the control method for the self-adaptive adjustment of the water pump proportional valve is as follows:
(1) Controlling a proportional valve of a water pump to open according to a cleaning operation mode selected by a user, and enabling the proportional valve to respond with a set initial water pressure value; the initial water pressure value is larger than zero and smaller than an expected water pressure value set in the current operation mode;
(2) Acquiring a water pressure value on a water channel where the proportional valve is located in real time, calculating an average water pressure value in the current time period, comparing the magnitude relation between an expected water pressure value and the average water pressure value, and if the difference value between the expected water pressure value and the average water pressure value is greater than a set threshold value, gradually increasing a step water pressure increment in a stepped mode on the basis of the initial water pressure value, and controlling the proportional valve to adjust the opening;
or acquiring the water pressure value of the water channel where the proportional valve is located in real time, comparing the water pressure value at the current moment with the expected water pressure value, and if the difference value between the expected water pressure value and the water pressure value at the current moment is greater than a set threshold value, gradually increasing the water pressure increment of a step length in a step mode on the basis of the initial water pressure value, and controlling the proportional valve to adjust the opening.
The beneficial effects of the above technical scheme are:
the control method can adaptively adjust the opening degree of the proportional valve, so that the washing and sweeping equipment can gradually increase the opening degree of the proportional valve in a step mode from a default set value which is smaller than a recently expected water pressure value but larger than zero in a certain operation mode, the opening degree is adjusted reasonably, a worker does not need to adjust the proportional valve, the working efficiency is improved, and the problem that the cleaning operation can hurt passersby due to unreasonable adjustment of the proportional valve is avoided.
Further, the step-wise increasing the water pressure increment by one step in a stepwise manner includes:
and (3) recalculating the average water pressure value of the current time period after each step of increasing the water pressure increment of one step length, comparing the expected water pressure value with the average water pressure value according to the step (2), and if the difference value of the comparison between the expected water pressure value and the average water pressure value is still larger than the set threshold value, increasing the water pressure increment of one step length on the basis of the current controlled water pressure value until the difference value of the comparison between the expected water pressure value and the average water pressure value is not larger than the set threshold value when the expected water pressure value and the average water pressure value are compared for a certain time.
Further, the formula for comparing the expected water pressure value with the average water pressure value is as follows:
in the formula, thre [ s ]]A desired water pressure value in a certain operation mode is selected for the user,
is the average water pressure value, t n Representing the current time interval as the total sampling time interval; n is the number of collected water pressure values in the current time period,
is at t i The water pressure value collected at any moment is obtained by collecting through a pressure sensor arranged on a water path; delta of v Is the set threshold.
Based on the purpose, the second technical scheme of the control method for the self-adaptive adjustment of the water pump proportional valve is as follows:
(1) Controlling a proportional valve of a water pump to be opened according to a cleaning operation mode selected by a user, and enabling the proportional valve to respond with a set initial water pressure value; the initial water pressure value is larger than zero and smaller than an expected water pressure value set in the current operation mode;
(2) Acquiring a water pressure value on a waterway where a proportional valve is positioned in real time, calculating an average water pressure value in the current time period, comparing the magnitude relation between an expected water pressure value and the average water pressure value, and if the difference value between the expected water pressure value and the average water pressure value is greater than a set threshold value, gradually increasing a water pressure increment of a step length in a step mode on the basis of the initial water pressure value, and controlling the proportional valve to adjust the opening degree; if the difference value between the expected water pressure value and the average water pressure value is smaller than the set threshold value, on the basis of the initial water pressure value, gradually reducing the water pressure increment of one step in a stepped mode, and controlling the proportional valve to adjust the opening degree until the difference value between the expected water pressure value and the average water pressure value is neither larger than nor smaller than the set threshold value;
or acquiring a water pressure value on a water channel where the proportional valve is positioned in real time, comparing the water pressure value at the current moment with an expected water pressure value, and if the difference value between the expected water pressure value and the water pressure value at the current moment is greater than a set threshold value, gradually increasing a water pressure increment of a step length in a step mode on the basis of the initial water pressure value, and controlling the proportional valve to regulate the opening; if the difference value between the expected water pressure value and the water pressure value at the current moment is smaller than the set threshold value, on the basis of the initial water pressure value, gradually increasing the water pressure increment of one step in a step mode, and controlling the proportional valve to adjust the opening degree until the difference value between the expected water pressure value and the water pressure value at a certain moment is not larger than or smaller than the set threshold value.
The beneficial effects of the above technical scheme are:
the control method can adaptively adjust the opening degree of the proportional valve, so that the washing and sweeping equipment can gradually increase or decrease the opening degree of the proportional valve in a step mode from a default set value which is smaller than a recently expected water pressure value but larger than zero in a certain operation mode, the opening degree is adjusted reasonably, a worker does not need to adjust the proportional valve, the working efficiency is improved, and the problem that the cleaning operation can hurt passersby due to unreasonable adjustment of the proportional valve is avoided.
Further, the stepwise increasing/decreasing of the water pressure increment by one step in a stepwise manner includes:
and (3) recalculating the average water pressure value of the current time period after increasing/decreasing the water pressure increment of one step, comparing the expected water pressure value with the average water pressure value according to the step (2), and if the difference value of the comparison between the expected water pressure value and the average water pressure value is still larger than the set threshold value, increasing/decreasing the water pressure increment of one step on the basis of the current controlled water pressure value until the difference value of the comparison between the expected water pressure value and the average water pressure value is not larger than the set threshold value when comparing the expected water pressure value with the average water pressure value for a certain time.
Further, the formula for comparing the expected water pressure value with the average water pressure value is as follows:
in the formula, thre [ s ]]A desired water pressure value in a certain operation mode is selected for the user,
is the average water pressure value, t n Representing the current time interval as a sampling total time interval; n is the number of collected water pressure values in the current time period,
is at t i The water pressure value collected at any moment is collected by a pressure sensor arranged on a water path; delta v Is the set threshold.
Based on the purpose, the technical scheme of the control device for the self-adaptive adjustment of the water pump proportional valve is as follows:
comprising a memory and a processor, and a computer program stored on said memory and running on said processor, said processor being coupled to said memory, characterized in that said processor implements said control method when executing said computer program.
The beneficial effects of the above technical scheme are:
the control device can adjust the opening of the proportional valve in real time, is reasonable in adjustment, and solves the problems that in the prior art, the working efficiency is reduced due to the fact that the proportional valve is inconvenient to adjust, and cleaning operation is possibly hurt to passers-by due to the fact that the proportional valve is unreasonable to adjust.
Based on the purpose, the technical scheme of the control system for the self-adaptive adjustment of the water pump proportional valve is as follows:
the system comprises a central control screen and an upper controller, wherein the upper controller is in communication connection with the central control screen and is used for acquiring an operation mode selected by a user; the upper controller is connected with a water pressure sensor in a collecting way, and the water pressure sensor is arranged on a water path of water outlet of the water pump and used for collecting a water pressure value on the water path in real time and sending the water pressure value to the upper controller;
the upper controller is also connected with a water pump proportional valve in a control mode and used for outputting a control instruction to the proportional valve according to the control method after acquiring the water pressure value on the water channel and the action mode selected by the user so as to realize the step-type adjustment of the proportional valve.
The beneficial effects of the above technical scheme are:
the control system can adjust the opening of the proportional valve in real time, is reasonable in adjustment, and solves the problems that in the prior art, the working efficiency is reduced due to inconvenient adjustment of the proportional valve, and cleaning operation possibly damages passers-by due to unreasonable adjustment of the proportional valve.
Drawings
FIG. 1 is a flow chart of a control method of adaptive control of a proportional valve in embodiment 1 of the method of the present invention;
FIG. 2 is a flow chart of a control method of adaptive control of a proportional valve in embodiment 2 of the method of the present invention;
FIG. 3 is a control system diagram in embodiment 1 of the system of the present invention;
fig. 4 is a display interface diagram of the center control screen in embodiment 1 of the system of the present invention.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings.
Method example 1:
the embodiment provides a control method for self-adaptive adjustment of a water pump proportional valve, and the overall flow is shown in fig. 1, and the control method comprises the following steps:
(1) And controlling a proportional valve of the water pump to be opened according to the cleaning operation mode selected by the user, so that the proportional valve responds with the set initial water pressure value.
In this step, the initial water pressure value is greater than zero and less than the expected water pressure value in the current operation mode, so that the water outlet on the water path discharges water at a water pressure smaller than the expected water pressure value, and the proportional valve is prevented from reaching the opening corresponding to the expected water pressure value at the beginning, so that the water pressure is suddenly too large, and impurities (such as stones and the like) on the road surface are suddenly washed away by water and then reach pedestrians on the road.
In this step, the set initial water pressure value corresponds to a certain opening degree of the proportional valve, and the opening degree represents that the initial water pressure value is reached.
In this step, the cleaning operation mode includes: a cleaning mode, a standard mode, a strong sweeping mode, a handheld spray gun mode and the like, wherein the expected water pressure value set in each mode is different.
(2) The method comprises the steps of collecting a water pressure value on a water channel where a proportional valve is located in real time, calculating an average water pressure value in the current time period, comparing the magnitude relation between an expected water pressure value and the average water pressure value, if the expected water pressure value is compared with the average water pressure value, the expected water pressure value is not only larger than the average water pressure value in the current time period, but also the degree (namely the difference) of the expected water pressure value larger than the average water pressure value is larger than a set threshold value, on the basis of an initial water pressure value, gradually increasing a water pressure increment of a step length in a step mode, and controlling the proportional valve to adjust the opening degree.
In this step, the step-by-step increase of the water pressure increment by one step length in a stepwise manner means: after the water pressure increment of one step is added, the average water pressure value of the current time period is recalculated, the expected water pressure value and the average water pressure value are compared according to the steps, if the difference value of the comparison between the expected water pressure value and the average water pressure value is still larger than the set threshold value, the water pressure increment of one step is added on the basis of the current controlled water pressure value until the difference value of the comparison between the expected water pressure value and the average water pressure value is not larger than the set threshold value when the expected water pressure value and the average water pressure value are compared for a certain time.
Specifically, in this step, the formula for comparing the expected water pressure value with the average water pressure value is as follows:
in the formula, thre [ s ]]A desired water pressure value in a certain operation mode is selected for the user,
is the average water pressure value, t n Representing the current time interval as a sampling total time interval; n is the number of collected water pressure values in the current time period,
is at t i The water pressure value collected at any moment is obtained by collecting through a pressure sensor arranged on a water path; delta v The receipt threshold value is a set desired value, i.e., the set threshold value mentioned above.
In the step, the design value of the expected value response threshold value needs to be smaller, so that the final water pressure value can be very close to the expected water pressure value after the water pressure of the water outlet of the water pump is gradually adjusted in the subsequent adjusting process of the proportional valve.
In this step, the average water pressure value in the current time period is used for comparing with the expected water pressure value, and the water pressure value at the current time or at a certain time is not used for comparing with the expected water pressure value, because the sampled data at a certain time may be abnormal due to some reasons, if the abnormal water pressure value is compared with the expected water pressure value, the subsequent proportional valve adjustment is seriously influenced, the serious over-regulation or under-regulation occurs, and the washing and sweeping effect is influenced.
Of course, if the occurrence of such a small probability event of abnormal sampling data is not considered, as another embodiment, the water pressure value at the current time may be compared with the expected water pressure value, so as to increase the calculation efficiency and reduce the calculation load of the processor.
Method example 2:
the control method for adaptive adjustment of the proportional valve in the present embodiment is different from the control method in embodiment 1 in that, in step (2), the proportional valve adjustment mode adopted in embodiment 1 is a stepwise increase mode, and the corresponding use scenario is proportional valve adjustment of initial power-on; the proportional valve adjustment mode adopted in this embodiment is a stepped increase mode and a stepped decrease mode, the corresponding use scenario may be proportional valve adjustment in which power is first supplied, or proportional valve adjustment in which a purge mode is switched, and a control process of the proportional valve is as shown in fig. 2.
Specifically, when the average water pressure value and the expected water pressure value are compared each time, whether the difference between the expected water pressure value and the average water pressure value is larger than a set threshold value or not is compared, if so, a step increment is added on the basis of the currently controlled water pressure value to adjust the proportional valve; if the water pressure value is smaller than the preset control water pressure value, the step increment is reduced on the basis of the current control water pressure value to adjust the proportional valve.
After the opening degree of the proportional valve is adjusted at this time, the average water pressure value and the expected water pressure value are compared again until the difference between the average water pressure value and the expected water pressure value is neither greater than the threshold value nor smaller than the threshold value, which indicates that the average water pressure value in the current time period reaches the vicinity of the expected water pressure value and the difference does not exceed the set threshold value.
Method example 3:
the difference between the control method for adaptive adjustment of a proportional valve in this embodiment and method embodiment 1 is that, before comparing the average/instantaneous water pressure value with the expected water pressure value for the first time, the method further includes a step of determining whether the average water pressure value or the collected water pressure value at a certain time (i.e., the instantaneous water pressure value) is valid, wherein the specific step of determining whether the average water pressure value is valid is as follows:
and setting a minimum water pressure threshold, judging the size between the average water pressure value and the minimum water pressure threshold, if the set condition is met, judging that the average water pressure value is invalid, and controlling the proportional valve to be closed.
In this step, the judgment formula of the above setting condition is as follows:
in the formula, delta vl Is the set minimum water pressure threshold.
Of course, the judgment formula is not limited to a specific form, and as another embodiment, the judgment formula of the above setting condition may be:
in the formula, delta vl ' is the set minimum water pressure threshold.
In this embodiment, the step of determining whether the water pressure value at a certain time is valid is as follows:
similarly, a lowest water pressure threshold value is set, the size between the water pressure value at a certain moment and the lowest water pressure threshold value is judged, and if the water pressure value at a certain moment is smaller than the lowest water pressure threshold value, the water pressure value at a certain moment is judged to be invalid; and then, judging whether the water pressure value at the next moment is invalid again according to the method, and if the water pressure values at several continuous moments are judged to be invalid, controlling the proportional valve to close.
System example 1:
the embodiment provides a control system for self-adaptive adjustment of a water pump proportional valve, which comprises a central control screen and an upper controller, wherein the upper controller is in communication connection with the central control screen and is used for acquiring an operation mode selected by a user; the water pressure sensor is arranged on a water path of water outlet of the water pump and used for acquiring a water pressure value on the water path in real time and sending the water pressure value to the upper controller.
The upper controller is also connected with a water pump proportional valve in a control mode, and is used for comparing the average/instantaneous water pressure value with the expected water pressure value according to the method in the method embodiment 1 or the method embodiment 2 after acquiring the water pressure value on the water path and the action mode selected by the user, so that a control instruction is output to the proportional valve, and the stepped adjustment of the proportional valve is realized.
The components of the system are described as follows:
the central control display screen: selecting an operation mode, setting a default response value of a water pump proportional valve mode, and monitoring an output value of a proportional valve and a water pressure value of a water channel; the display interface is shown in fig. 4, wherein numerals 1-14 indicate 14 set desired water pressure values (in voltage values) corresponding to 14 different action modes;
installing a controller: collecting a water pressure value of a waterway and controlling a proportional valve of a water pump;
a water pump proportional valve: turning on and off a waterway and adjusting the flow of the waterway;
a water pressure sensor: and detecting the water pressure value of the water channel.
The working principle of the system is as follows:
an operator can set a mode default water pump proportional valve response value through the central control display screen and switch the operation mode. Firstly, after the mode is switched, the proportional valve reaches a default quick response value; secondly, acquiring the average water pressure of the flow section through a sensing device; then setting a mode expected value and an expected value return receipt threshold value, and calculating through an adaptive adjustment model and an adaptive adjustment algorithm to obtain a proportional valve adjustment value; and finally, sending the result to an upper controller to realize proportional valve control.
System example 2:
the control system of this embodiment is different from the system embodiment 1 in that before comparing the average/instantaneous water pressure value with the expected water pressure value for the first time, it further includes a step of determining whether the water pressure sensor fails, and the specific determination step is to determine whether the average water pressure value or the collected water pressure value at a certain time (i.e., the instantaneous water pressure value) is valid, and if not, it is determined that the water pressure sensor fails, and then the proportional valve is closed, and an alarm prompt of the failure of the water pressure sensor is sent to the central control panel, so as to prompt the maintenance of the water pressure sensor.
In this embodiment, please refer to the record in method embodiment 3 in the process of determining whether the average water pressure value or the collected water pressure value at a certain time is valid, which is not described in this embodiment again.
The embodiment of the device comprises:
the embodiment provides a control device for adaptive adjustment of a water pump proportional valve, which comprises a memory, a processor and a computer program, wherein the computer program is stored in the memory and runs on the processor, the processor is coupled with the memory, and the processor is used for running program instructions stored in the memory to realize the control methods in method embodiments 1, 2 and 3.
Finally, it should be noted that: although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (6)
1. A control method for self-adaptive adjustment of a water pump proportional valve is characterized by being used on a sanitation truck and comprising the following steps of:
(1) Controlling a proportional valve of a water pump to be opened according to a cleaning operation mode selected by a user, and enabling the proportional valve to respond with a set initial water pressure value; the initial water pressure value is larger than zero and smaller than an expected water pressure value set in the current operation mode;
(2) Acquiring a water pressure value on a water channel where the proportional valve is located in real time, calculating an average water pressure value in the current time period, comparing the magnitude relation between an expected water pressure value and the average water pressure value, if the difference value between the expected water pressure value and the average water pressure value is greater than a set threshold value, gradually increasing a water pressure increment of a step length in a step mode on the basis of the initial water pressure value, and controlling the proportional valve to adjust the opening until the difference value between the expected water pressure value and the average water pressure value is not greater than the set threshold value; the formula for comparing the desired water pressure value with the average water pressure value is as follows:
in the formula, thre [ s ]]A desired water pressure value in a certain operation mode is selected for the user,
is the average water pressure value, t n Representing the current time interval as the total sampling time interval; n is the number of collected water pressure values in the current time period,
is at t i The collected water pressure value is obtained by collecting through a water pressure sensor arranged on a water path; delta v Is the set threshold;
before comparing the average water pressure value with the expected water pressure value for the first time, the method also comprises the following steps of:
the judgment formula is as follows:
if the average water pressure value is smaller than the set minimum water pressure threshold value, the average water pressure value is judged to be invalid, the water pressure sensor is judged to have a failure fault, and an alarm prompt of the failure fault of the water pressure sensor is sent to the central control screen.
2. The control method for adaptive adjustment of the water pump proportional valve according to claim 1, wherein the step-wise increasing the water pressure increment by one step comprises:
and (3) recalculating the average water pressure value of the current time period after each step of increasing the water pressure increment of one step length, comparing the expected water pressure value with the average water pressure value according to the step (2), and if the difference value of the comparison between the expected water pressure value and the average water pressure value is still larger than the set threshold value, increasing the water pressure increment of one step length on the basis of the current controlled water pressure value until the difference value of the comparison between the expected water pressure value and the average water pressure value is not larger than the set threshold value when the expected water pressure value and the average water pressure value are compared for a certain time.
3. A control method for self-adaptive adjustment of a water pump proportional valve is characterized by being used on a sanitation truck and comprising the following steps:
(1) Controlling a proportional valve of a water pump to be opened according to a cleaning operation mode selected by a user, and enabling the proportional valve to respond with a set initial water pressure value; the initial water pressure value is larger than zero and smaller than an expected water pressure value set in the current operation mode;
(2) Acquiring a water pressure value on a waterway where a proportional valve is positioned in real time, calculating an average water pressure value in the current time period, comparing the magnitude relation between an expected water pressure value and the average water pressure value, and if the difference value between the expected water pressure value and the average water pressure value is greater than a set threshold value, gradually increasing a water pressure increment of a step length in a step mode on the basis of the initial water pressure value, and controlling the proportional valve to adjust the opening degree; if the difference value between the expected water pressure value and the average water pressure value is smaller than the set threshold value, on the basis of the initial water pressure value, gradually reducing the water pressure increment of one step in a step mode, and controlling a proportional valve to adjust the opening degree until the difference value between the expected water pressure value and the average water pressure value is neither greater than nor smaller than the set threshold value; the formula for comparing the expected water pressure value with the average water pressure value is as follows:
in the formula, thre [ s ]]A desired water pressure value in a certain operation mode is selected for the user,
is the average water pressure value, t n Representing the current time interval as a sampling total time interval; n is the number of collected water pressure values in the current time period,
is at t i The collected water pressure value is obtained by collecting through a water pressure sensor arranged on a water path; delta v Is the set threshold;
before comparing the average water pressure value with the expected water pressure value for the first time, the method also comprises the following steps of:
the judgment formula is as follows:
if the average water pressure value is smaller than the set minimum water pressure threshold value, the average water pressure value is judged to be invalid, the water pressure sensor is judged to have a failure fault, and an alarm prompt of the failure fault of the water pressure sensor is sent to the central control screen.
4. The control method for adaptive adjustment of the water pump proportional valve according to claim 3, wherein the step-wise increasing/decreasing of the water pressure increment by one step comprises:
and (3) recalculating the average water pressure value of the current time period after increasing/decreasing the water pressure increment of one step, comparing the expected water pressure value with the average water pressure value according to the step (2), and if the difference value of the comparison between the expected water pressure value and the average water pressure value is still larger than the set threshold value, increasing/decreasing the water pressure increment of one step based on the current controlled water pressure value until the difference value of the comparison between the expected water pressure value and the average water pressure value is not larger than or smaller than the set threshold value.
5. A control device for adaptive adjustment of a water pump proportional valve, comprising a memory and a processor, and a computer program stored on the memory and running on the processor, wherein the processor is coupled with the memory, and wherein the processor implements the control method according to any one of claims 1 to 4 when executing the computer program.
6. A control system for self-adaptive adjustment of a water pump proportional valve is characterized by comprising a central control screen and an upper controller, wherein the upper controller is in communication connection with the central control screen and is used for acquiring an operation mode selected by a user; the upper controller is connected with a water pressure sensor in a collecting way, and the water pressure sensor is arranged on a water path of water discharged by the water pump, is used for collecting a water pressure value on the water path in real time and sending the water pressure value to the upper controller;
the upper-mounted controller is also in control connection with a water pump proportional valve and is used for outputting a control instruction to the proportional valve according to the control method of any one of claims 1 to 4 after acquiring the water pressure value on the water path and the action mode selected by a user so as to realize the stepped adjustment of the proportional valve.
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