CN116281817A - Learning type oiling electromagnetic valve control method - Google Patents

Abstract

This application discloses a control method for a learning type refueling solenoid valve, through the collection of the valve body closing data of the main and auxiliary valves during each refilling process and the calculation of the average value of multiple sets of collected data, the adjustment of the main and auxiliary valves is continuously corrected and adjusted. The closing advance prevents the main and auxiliary valve bodies from being disturbed by the external electromagnetic environment or the pressure of the submersible pump, and solves the technical problem of the existing technical error in the control of the oil filling amount in the prior art. While reducing the measurement error, through optimization Adjust the closing advance of the main and auxiliary valves to avoid excessive closing advance of the main valve, thereby improving the filling efficiency.

Description

Learning type refueling solenoid valve control method

technical field

The present application relates to the technical field of fuel filling equipment, in particular to a control method for a learning type fuel filling solenoid valve.

Background technique

Solenoid valve plays an extremely important role in fueling equipment, and the control accuracy of solenoid valve directly affects the accuracy of fuel metering. The controlled solenoid valve installed in the pipeline of the refueling equipment receives the instructions of the controller and controls the filling volume of the oil by opening and closing. Since the controlled solenoid valve cannot be closed immediately after receiving the control instruction and it is easy to close suddenly The impact caused by the pipeline will affect the filling accuracy and the service life of the fueling equipment.

A method known to the inventor to realize the control of the filling volume is: to set the main solenoid valve of the large flow valve and the auxiliary solenoid valve of the small flow in the oil filling pipeline, and realize the rough control of the filling volume through the main solenoid valve, and the auxiliary solenoid valve The auxiliary solenoid valve realizes further and more accurate filling volume control. When filling, all the solenoid valves are energized and opened, that is, both the large flow valve (main valve) and the small flow valve (auxiliary valve) are opened. There is still a certain time difference between the control circuit receiving the valve closing signal and the actual closing of the valve body. Therefore, in order to eliminate the influence of this time difference on the accuracy of the filling volume, the valve body closing advance amount is set. When the preset filling volume reaches the closing When the large flow valve (main valve) advances, the meter control board sends a signal to close the large flow valve (main valve), closes the large flow valve (main valve), and the small flow valve (secondary valve) continues to refuel until the preset amount, closes Small flow valve (auxiliary valve), end of refueling.

However, in the process of implementing the technical solutions in the embodiments of the present application, the inventors of the present application found that the above-mentioned technology has at least the following technical problems:

In order to reduce the overshoot of refueling, although the method of closing the valve at a certain time in advance is adopted to improve the accuracy of refueling, due to the complicated operating environment of the fuel dispenser, the solenoid valve spool will be affected by factors such as magnetic field strength and submersible pump pressure. The closing time of the main and auxiliary valves will produce distribution errors under the influence of the individual differences of the solenoid valves and the pressure of the closing valve spring, which will affect the efficiency of the fuel dispenser and the accuracy of measurement.

The information disclosed in this background section is only for deepening the understanding of the background technology of the present disclosure, and should not be regarded as an acknowledgment or in any form to imply that the information constitutes the prior art known to those skilled in the art.

Contents of the invention

The inventor found through research that the reason for the inaccurate metering of the fuel dispenser is that the solenoid valve spool is affected by factors such as the environmental magnetic field and the pressure of the submersible pump, which causes the response time of the main/auxiliary solenoid valve to be unstable and fluctuate, so the constant The early closing of the main and auxiliary valves cannot adapt to the change in the closing time of the main and auxiliary valves caused by changes in the surrounding electromagnetic environment or the pressure of the submersible pump, resulting in inaccurate filling and metering; and because the closing time of the main valve cannot be accurately controlled , in order to ensure the accuracy of filling measurement, the main valve will be closed earlier, and the auxiliary valve will be closed after the main valve is closed for a period of time. Environmental interference, but the early closing of the main valve will reduce the filling efficiency.

In view of at least one of the above technical problems, the present disclosure provides a learning type refueling solenoid valve control method, by recording and processing the response data of the main and auxiliary valves each time they are refueled, and continuously correcting the valve closing accordingly. The advance amount is used to solve the technical problem in the prior art that the spools of the main and auxiliary solenoid valves are affected by the surrounding environment and have errors, thereby affecting the accuracy of fueling metering.

According to one aspect of the present disclosure, a method for controlling a learning type refueling solenoid valve is provided, including the following steps:

(1) Set the closing advances TF1 and TF2 of the main and auxiliary valves respectively;

(2) Set the filling amount L1, and the main and auxiliary valves are opened at the same time for oil filling; at the same time, the metering system starts to calculate the filling amount L2 and the filling flow rate V in real time;

(3) Determine whether the set main valve closing advance TF1 is reached, until the set main valve closing advance TF1 is reached, close the main valve, and record the current time TC1n, n=1, 2...;

(4) Determine whether the oil flow rate is constant after the main valve is closed, until it reaches a constant flow rate, record the current time TS1n, calculate and record the main valve closing time T1n=TS1n-TC1n, n=1, 2...;

(5) Calculate the average value TA1 of the main valve closing time based on the main valve closing time data recorded for each filling;

(6) Determine whether the set auxiliary valve closing advance TF2 is reached, until the set auxiliary valve closing advance TF2 is reached, close the auxiliary valve, and record the current time TC2n, n=1, 2...;

(7) Determine whether the auxiliary valve is completely closed, until the auxiliary valve is completely closed, record the current time TS2n, calculate and record the closing time of the auxiliary valve T2n=TS2n-TC2n, n=1, 2...;

(8) Calculate the average value TA2 of the closing time of the main valve according to the closing time data of the auxiliary valve recorded for each filling;

(9) After refueling, correct the closing advance of the main and auxiliary valves, so that the main valve closing advance TF1=TA1+TA2, and the auxiliary valve closing advance TF2=TA2.

In some embodiments of the present disclosure, in the step (1), the closing advance amount TF1 of the main valve is greater than the closing advance amount TF2 of the auxiliary valve.

In some embodiments of the present disclosure, in the step (3), the real-time calculation of the time required for the remaining amount of oil to be filled L1-L2 is calculated in real time through the real-time statistics and calculation of the fueling amount L2 and the flow rate V of the metering system in the step (2). T=(L1-L2)/V, compare whether T is equal to the main valve closing advance TF1, and judge whether the set main valve closing advance TF1 is reached.

In some embodiments of the present disclosure, in the step (5), the latest 100 times of data including the current main valve closing time data are used to calculate the average value TA1 .

In some embodiments of the present disclosure, in the step (6), the time T=(L1- L2)/V, compare whether T is equal to the auxiliary valve closing advance amount TF2, and thus judge whether the set auxiliary valve closing advance amount TF2 is reached.

In some embodiments of the present disclosure, in the step (8), the latest 100 times of data including the current auxiliary valve closing time data are taken to calculate the average value TA2 .

One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

Through the collection of the closing data of the main and auxiliary valves during each filling process and the calculation of the average value of multiple sets of collected data, the closing advance of the main and auxiliary valves is continuously corrected to avoid the main and auxiliary valve bodies being affected by the outside world. The electromagnetic environment or the pressure interference of the submersible pump solves the technical problem of the error in the control of the oil filling volume in the prior art. While reducing the measurement error, the main and auxiliary valve closing advances are optimized to avoid the main valve closing in advance. The amount is too large, thereby improving the filling efficiency.

Description of drawings

FIG. 1 is a flow chart of a method for controlling a learning type refueling solenoid valve in an embodiment of the present application.

FIG. 2 is an ideal response curve of a solenoid valve in an embodiment of the present application.

Fig. 3 is the actual response curve of the learning type refueling solenoid valve in an embodiment of the present application.

Detailed ways

The programs involved or relied on in the following embodiments are conventional programs or simple programs in the technical field, and those skilled in the art can make conventional selections or adaptive adjustments according to specific application scenarios.

In order to better understand the technical solution of the present application, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

This example discloses a learning-type refueling solenoid valve control method, see Figure 1, which includes the following steps:

(1) Set the closing advances TF1 and TF2 of the main and auxiliary valves respectively.

According to experience, the closing advances TF1 and TF2 of the main and auxiliary valves are respectively set in the control system. Since the flow of oil through the main valve is relatively large, the flow of oil through the auxiliary valve is relatively small. Therefore, in order to realize the filling amount When the filling volume is about to reach the set oil filling volume, the fuel dispenser controller first closes the high-flow main valve in advance according to the set advance amount TF1. At this time, the high-flow filling volume where the main valve is located The pipeline has been closed, and the remaining oil to be filled is controlled by a small flow auxiliary valve to avoid overshoot caused by excessive flow. Therefore, it is necessary to ensure that TF1>TF2, that is, close the main valve and then close the auxiliary valve. In addition, in some other embodiments, the first filling is a test filling, and the closing advances TF1 and TF2 of the main and auxiliary valves are set arbitrarily, and the closing advances are adjusted according to the action data of the main and auxiliary valves through subsequent steps. Adjustment.

(2) Set the filling amount L1, the main and auxiliary valves are opened at the same time for oil filling; at the same time, the metering system starts to calculate the filling amount L2 and the filling flow rate V in real time.

After setting the closing advance amounts TF1 and TF2 of the main and auxiliary valves, input the filling amount of oil on the control panel of the fuel dispenser, and the controller of the fuel dispenser will control the main and auxiliary valves to open at the same time after receiving the filling instruction. Filling of oil products, and at the same time, the sensor installed on the oil circuit performs real-time metering and monitoring of the flow and velocity of the oil in the pipeline.

(3) Determine whether the set main valve closing advance TF1 is reached, until the set main valve closing advance TF1 is reached, close the main valve, and record the current time TC1n, n=1, 2....

In order to judge whether the set main valve closing advance amount TF1 is reached, it is necessary to estimate the time when the refueling ends. In this embodiment, the end time of filling is estimated based on the oil filling volume and flow rate acquired by the sensor in step (2) in real time. The fuel dispenser controller calculates the remaining oil volume to be filled as L1-L2 based on the initially set oil filling volume L1 and the sensor’s real-time monitoring and perception of the filled oil volume L2. At this time, according to the real-time flow rate obtained by the sensor V, the time T=(L1-L2)/V to estimate the remaining amount of oil to be filled according to the current oil filling speed, compare this time T with the main valve closing advance amount TF1 , to judge whether the two are equal, until the time T decreases with the filling until it is equal to the main valve closing advance TF1, it means that the main valve closing advance is reached, the controller controls the action of the main valve, closes the valve, and at this time Record the time TC1n when the valve closing command is issued, where n=1, 2..., where n represents the nth oil filling operation.

(4) Determine whether the oil flow rate is constant after the main valve is closed, until it reaches a constant flow rate, record the current time TS1n, calculate and record the closing time of the main valve T1n=TS1n-TC1n, n=1, 2....

After receiving the valve closing control command from the tanker, the main valve without closing advance will gradually close the valve body. Since the valve body closes mechanically, it will take a certain amount of time to close it. When the valve body is fully open to fully closed, the oil will flow out of the main valve that is not fully closed under the pressure of the oil pump, which will cause overshoot of the oil and make the filling metering inaccurate. Therefore, It is necessary to set the closing advance amount to offset the impact on the filling volume caused by the closing process of the valve body through the early closing of the valve body. In addition, on the one hand, if the amount of early closing is too large, the main valve with large flow will be closed in advance, and the remaining oil to be filled will be filled through the auxiliary valve with small flow. The injection is slow, which leads to a delay in the end of the filling time, which reduces the filling efficiency of the tanker; on the other hand, if the early closing amount is too small, the main valve with a large flow rate cannot be completely closed within the set early closing time. Closed, resulting in oil that should not be output flowing out of the valve body where the main valve is not completely closed, eventually resulting in overshoot of the oil, making the filling metering inaccurate.

Therefore, the setting of the early closing amount of the valve body is related to the closing time of the valve body. It is necessary to ensure that the early closing amount of the valve body is consistent with the closing time of the valve body, so as to avoid the reduction of filling efficiency caused by the early closing of the main valve or the failure caused by the late closing of the main valve. overshoot. In order to obtain the time required for the closing of the valve body, it is necessary to record the time TS1n when the main valve is completely closed. During the closing process of the main valve, the flow velocity in the fueling pipeline behind the main valve will change until the main valve is completely closed. The flow rate is not affected by the main valve, so the time when the oil flow rate is constant is taken as the time TS1n when the main valve is closed, and in step (3), the time TC1n when the valve closing command is issued has been recorded, so the main valve can be calculated The time spent on closing T1n=TS1n-TC1n, n=1, 2...; where n represents the nth oil filling operation, because every time the filling operation is performed, the electromagnetic environment around the tanker and the work of the submersible pump There are differences in the state, such as the surrounding electromagnetic interference or the pressure change of the submersible pump, etc., the closing time of the solenoid valve will not be constant, so the time T1n taken to close the main valve during each filling is recorded.

(5) Calculate the average value TA1 of the main valve closing time based on the main valve closing time data recorded for each filling.

Since the solenoid valve may be disturbed by different factors every time filling is performed, in order to eliminate the influence of special factors on the time spent on closing the main solenoid valve in individual cases, the time taken to close the main solenoid valve obtained has a certain representative and adaptability Therefore, the average value processing method is adopted for the main valve closing time T1n of each filling record, that is, the main valve closing time TA1=(T11+T12+······+T1n)/n, the main valve closing time The time TA1 is used as a reference for the closing time of the main valve in the next filling, so that the advance amount can be corrected and adjusted.

In this embodiment, in order to better reflect the working status of the tanker in the recent period, further improve the reliability of the data, and avoid the interference of early data, the latest 100 data including the current main valve closing time data are taken for The calculation of the average value TA1 makes the data more representative, can reflect the latest working state of the solenoid valve, and can reduce the corresponding calculation amount.

(6) Determine whether the set auxiliary valve closing advance TF2 is reached, until the set auxiliary valve closing advance TF2 is reached, close the auxiliary valve, and record the current time TC2n, n=1, 2...;

After the main valve is fully closed, the auxiliary valve is still fully open until the set oil volume is filled. Since the closing of the auxiliary valve is not instantaneous and requires a certain closing time, it is necessary to set the closing advance amount TF2 of the auxiliary valve. Completely closed, so that the filling amount cannot reach the set value, which affects the accuracy of filling measurement; if the auxiliary valve closing advance is too small, it will cause the auxiliary valve to not be completely closed when the filling amount has reached the set filling amount , There is still oil flowing out of the auxiliary valve, resulting in overshoot. Therefore, the determination of the auxiliary valve closing advance amount TF2 is related to the closing time of the auxiliary valve, so that when the auxiliary valve is completely closed, the filling of the corresponding set oil volume can be accurately completed. For this reason, statistics are made on the time spent closing the auxiliary valve.

In order to judge whether the set auxiliary valve closing advance amount TF2 is reached, the remaining amount of oil to be filled L1-L2 can be calculated in real time through the real-time statistics and calculation of the fueling amount L2 and the flow rate V of the metering system. Filling time T=(L1-L2)/V, compare whether T is equal to the auxiliary valve closing advance amount TF2, and thus judge whether the set auxiliary valve closing advance amount TF2 is reached. When T is equal to the auxiliary valve closing advance amount TF2, the fuel dispenser controller sends a control command to control the auxiliary valve to close, and records the time TC2n when the valve closing command is issued, n=1, 2..., where n represents the nth time Oil filling operation.

(7) Determine whether the auxiliary valve is completely closed, until the auxiliary valve is completely closed, record the current time TS2n, calculate and record the closing time of the auxiliary valve T2n=TS2n-TC2n, n=1, 2....

Within a period of time after the auxiliary valve closing control command is issued, the auxiliary valve will gradually close. At this time, the oil flow in the pipeline can be used to judge whether the auxiliary valve is completely closed. When the auxiliary valve is completely closed, record the current time TS2n, and pass The time TC2n when the valve closing command is issued recorded in step (6) can be calculated to obtain the closing time of the auxiliary valve T2n=TS2n-TC2n, n=1, 2..., where n represents the nth oil filling operation.

(8) Calculate the average value TA2 of the closing time of the main valve according to the data of the closing time of the auxiliary valve recorded for each filling.

Similarly, the work of the auxiliary valve is also affected by factors such as the surrounding electromagnetic environment and the pressure of the submersible pump. Therefore, in order to eliminate the influence of the closing time of the valve body on the overall valve body closing data in the disturbing environment, the recorded closing time of each auxiliary valve is carried out. Average value processing, that is, when the auxiliary valve is closed TA2=(T21+T22+······+T2n)/n, the auxiliary valve closing time TA2 is used as the auxiliary valve closing time reference for the next filling, so as to adjust the advance amount Make correction adjustments.

In this embodiment, in order to better reflect the working state of the tanker in the recent period of time, the latest 100 data including the current auxiliary valve closing time data are taken to calculate the average value TA2, so that the data is more representative , which can reflect the latest working state of the solenoid valve and reduce the corresponding calculation amount.

(9) After refueling, correct the closing advance of the main and auxiliary valves, so that the main valve closing advance TF1=TA1+TA2, and the auxiliary valve closing advance TF2=TA2.

Through the calculation of the average closing time of the main valve and auxiliary valve in step (5) and step (8), representative valve body closing times TA1 and TA2 can be obtained. Since the main valve is closed earlier than the auxiliary valve, and in order to improve the filling efficiency, the main valve closing advance amount TF1=TA1+TA2, and the auxiliary valve closing advance amount TF2=TA2, that is, the auxiliary valve closes immediately after the main valve is closed, to avoid In the prior art, the time margin between the complete closing of the main valve and the beginning of closing of the auxiliary valve is achieved, the precise control of the valve body is achieved, and the filling efficiency is improved; and because TA1 and TA2 contain the previous valve body closing data, That is, through learning the valve body closing data, the time required for valve closing is obtained, and based on this, the main and auxiliary valve body closing advances for the next refueling are set to achieve the effect of improving filling efficiency and measurement accuracy.

After verification, see Figure 2-Figure 3, after the solenoid valve is corrected and regulated by this method, on the premise of ensuring the accuracy of the filling volume, the time required to reach the valve closing basically meets the requirements of the ideal closing advance amount, and the filling efficiency is improved. Effect.

While some preferred embodiments of the present application have been described, additional changes and modifications can be made to these embodiments by those skilled in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the application of the present invention.

Obviously, those skilled in the art can make various changes and modifications to the application of the present invention without departing from the spirit and scope of the present invention. In this way, if the modifications and variations to the application of the present invention fall within the scope of the claims of the application and their equivalent technologies, the application of the present invention is also intended to include these modifications and variations.

Claims (6)

1. A learning type refueling electromagnetic valve control method, is characterized in that, comprises the steps: (1) Set the closing advances TF1 and TF2 of the main and auxiliary valves respectively; (2) Set the filling amount L1, and the main and auxiliary valves are opened at the same time for oil filling; at the same time, the metering system starts to calculate the filling amount L2 and the filling flow rate V in real time; (3) Determine whether the set main valve closing advance TF1 is reached, until the set main valve closing advance TF1 is reached, close the main valve, and record the current time TC1n, n=1, 2...; (4) Determine whether the oil flow rate is constant after the main valve is closed, until it reaches a constant flow rate, record the current time TS1n, calculate and record the main valve closing time T1n=TS1n-TC1n, n=1, 2...; (5) Calculate the average value TA1 of the main valve closing time based on the main valve closing time data recorded for each filling; (6) Determine whether the set auxiliary valve closing advance TF2 is reached, until the set auxiliary valve closing advance TF2 is reached, close the auxiliary valve, and record the current time TC2n, n=1, 2...; (7) Determine whether the auxiliary valve is completely closed, until the auxiliary valve is completely closed, record the current time TS2n, calculate and record the closing time of the auxiliary valve T2n=TS2n-TC2n, n=1, 2...; (8) Calculate the average value TA2 of the closing time of the main valve according to the closing time data of the auxiliary valve recorded for each filling; (9) After refueling, correct the closing advance of the main and auxiliary valves, so that the main valve closing advance TF1=TA1+TA2, and the auxiliary valve closing advance TF2=TA2. 2 . The learning-type refueling solenoid valve control method according to claim 1 , wherein, in the step (1), the main valve closing advance amount TF1 is greater than the auxiliary valve closing advance amount TF2 . 3. The learning-type refueling solenoid valve control method according to claim 1, characterized in that, in the step (3), the real-time calculation of the refueling amount L2 and the flow rate V calculated by the metering system in the step (2) in real time Time T=(L1-L2)/V required for the remaining amount of oil to be filled L1-L2, compare whether T is equal to the main valve closing advance TF1, and thus judge whether the set main valve closing advance TF1 is reached. 4. The control method of the learning type refueling solenoid valve according to claim 1, characterized in that, in the step (5), the data of the latest 100 times including the current main valve closing time data are taken to perform the average value TA1 calculation. 5. The control method of the learning type refueling solenoid valve according to claim 1, characterized in that in the step (6), the remaining fuel to be refilled is calculated in real time through the real-time statistical calculation of the refueling amount L2 and the flow rate V of the metering system The time required to measure L1-L2 is T=(L1-L2)/V, compare whether T is equal to the auxiliary valve closing advance amount TF2, and judge whether the set auxiliary valve closing advance amount TF2 is reached. 6. The learning-type refueling solenoid valve control method according to claim 1, characterized in that in the step (8), the average value is calculated by taking the data of the last 100 times including the data of the closing time of the current auxiliary valve TA2 calculation.

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