Flow control system of multi-connected pneumatic flow multi-way valve

Abstract

The invention relates to the technical field of valve body control, and particularly discloses a flow control system of a multi-connected pneumatic flow multi-way valve, which is characterized in that a flow acquisition module is used for acquiring a flow value of each channel on an acquisition node in an acquisition period to obtain a channel flow value group of each channel; and the channel construction module is used for processing the channel flow value group corresponding to each channel, constructing a flow value dynamic curve, obtaining channel flow unstable data based on the flow value dynamic curve, obtaining a channel flow abnormal analysis value on each channel according to the channel flow unstable data, and sending the channel flow abnormal analysis value to the channel construction module. The channel division module divides channels of the multi-connected pneumatic flow multi-way valve based on the channel flow abnormal analysis value, and the association analysis module is used for comparing the change time period in the flow value dynamic curve of each channel with the change time periods corresponding to other channels to obtain the flow change association total value of each channel. And on-line evaluation of the channel flow adjustment sequence is completed based on the flow change association total value.

Description

Technical Field

[0001] The present invention relates to the technical field of valve body control, and in particular to a multi-connection pneumatic flow multi-way valve flow control system. Background Art

[0002] The multi-way pneumatic flow multi-way valve is an important pneumatic control component. The multi-way pneumatic flow multi-way valve enters the valve body through the air source, and uses the control device in the valve body to open or close multiple channels, thereby achieving precise control of the pneumatic actuator.

[0003] In the prior art, during the operation of the multi-way pneumatic flow multi-way valve, there is a lack of directional monitoring of the flow of each channel, which is not conducive to the online control of the flow of each channel in the multi-way pneumatic flow multi-way valve and has certain limitations. Summary of the invention

[0004] The object of the present invention is to provide a multi-pneumatic flow multi-way valve flow control system, by collecting the flow of multiple collection nodes in each channel of the multi-pneumatic flow multi-way valve, the flow values ​​of the multiple collection nodes are constructed into a flow value dynamic curve in chronological order, the flow value dynamic curve obtains channel flow unstable data, and the channel flow abnormality analysis value on each channel is obtained according to the channel flow unstable data, thereby completing the identification of the flow operation status of each channel in the multi-pneumatic flow multi-way valve.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A multi-connection pneumatic flow multi-way valve flow control system, comprising:

[0007] The flow collection module is used to collect the flow value of each channel at the collection node within the collection period, and integrate the flow values ​​collected by all nodes to obtain a channel flow value group of each channel;

[0008] The channel construction module is used to process the channel flow value group corresponding to each channel, construct a flow value dynamic curve, obtain the channel flow instability data based on the flow value dynamic curve, and obtain the channel flow abnormal analysis value on each channel according to the channel flow instability data;

[0009] Channel division module: The channel division module divides the fluctuation range of the channels of the multi-joint pneumatic flow multi-way valve based on the abnormal analysis value of the channel flow;

[0010] The correlation analysis module is used to compare the change time period in the dynamic curve of the flow value of each channel with the change time period corresponding to the remaining channels, obtain the total flow change correlation value of each channel, and complete the identification of the channel flow adjustment order based on the total flow change correlation value.

[0011] As a further solution of the present invention: within the acquisition period, a plane coordinate system is established with time as the X-axis and flow value as the Y-axis;

[0012] In the plane coordinate system, the flow value corresponding to each acquisition node is plotted in the plane coordinate system in chronological order;

[0013] Then connect all the drawn points from left to right with a smooth curve to obtain the dynamic curve of the flow value corresponding to each channel.

[0014] As a further solution of the present invention: obtaining the flow rate rating range value corresponding to each channel, recording the flow rate rating upper limit value as the first flow rate value, and recording the flow rate rating lower limit value as the second flow rate value;

[0015] Draw a horizontal line parallel to the X-axis at the first flow value in the plane coordinate system, and record it as the first flow boundary;

[0016] Draw a horizontal line parallel to the X-axis at the second flow value in the plane coordinate system, and record it as the second flow boundary;

[0017] The area where the flow value dynamic curve is located above the first flow boundary is recorded as the upper over-boundary area;

[0018] The area where the flow value dynamic curve is located below the second flow boundary is recorded as the lower over-boundary area;

[0019] The upper and lower over-boundary areas are recorded as flow instability areas;

[0020] The area where the flow value dynamic curve is located between the first flow boundary and the second flow boundary is recorded as the flow stable area.

[0021] As a further solution of the present invention: the channel flow non-stable data includes the non-stable area surface proportion, the non-stable area time proportion and the flow deviation square proportion;

[0022] The proportion of unstable area is recorded as Fs;

[0023] The proportion of time in the unstable region is recorded as Ft;

[0024] The flow deviation ratio is recorded as Fp;

[0025] By formula The channel flow anomaly analysis value Fx on each channel is calculated, where a1 and a2 are preset proportional coefficients.

[0026] As a further solution of the present invention: the process of obtaining the proportion of the unstable area surface is:

[0027] Obtain the area value of the flow non-stable area and the area value of the flow stable area;

[0028] The area value of the unstable flow area is ratioed with the area value of the stable flow area to obtain the area ratio of the unstable area.

[0029] As a further solution of the present invention: the process of obtaining the proportion of the unstable area is as follows:

[0030] Obtain the time length corresponding to each unstable traffic area, sum the time lengths corresponding to all unstable traffic areas, and obtain the unstable traffic duration;

[0031] Obtain the time length corresponding to each flow stable area, sum the time lengths corresponding to all flow stable areas, and obtain the flow stable duration;

[0032] The ratio of the unstable traffic duration to the stable traffic duration is calculated to obtain the unstable area time ratio.

[0033] As a further solution of the present invention: the process of obtaining the flow deviation ratio is as follows:

[0034] The flow values ​​corresponding to all the trough points in the flow value dynamic curve are summed and averaged to obtain the minimum flow value of the flow value dynamic curve;

[0035] The flow values ​​corresponding to all the peak points in the flow value dynamic curve are summed and averaged to obtain the maximum flow value of the flow value dynamic curve;

[0036] The difference between the maximum flow value and the minimum flow value is calculated to obtain the flow deviation value of the flow value dynamic curve;

[0037] Calculate the ratio of the flow deviation value to the maximum flow value to obtain the flow deviation ratio;

[0038] The variance value of the channel flow value group and the flow deviation ratio are calculated to obtain the flow deviation square ratio.

[0039] As a further solution of the present invention: any one channel in the multi-connection pneumatic flow multi-way valve is recorded as the target channel;

[0040] The rising time corresponding to each rising time period of the target channel is recorded as MS i, where i is the number of rising time periods, and the corresponding duration of the remaining channels in the rising time period is obtained and recorded as QS in, where n is the number of the remaining channels in the rising time period;

[0041] By formula Calculate the rising coordination value Mn of any remaining channel and the target channel, where n is the number of remaining channels in the rising time period;

[0042] Then through the formula Calculate the rising correlation value Mnz of the target channel

[0043] As a further solution of the present invention: the falling time corresponding to each falling time period of the target channel is recorded as Mxj, where j is the number of falling time periods, and the corresponding duration of the remaining channels in the falling time period is obtained and recorded as Qxjm, where m is the number of the remaining channels in the falling time period;

[0044] By formula Calculate the descending coordination value Mm of any remaining channel and the target channel, where m is the number of remaining channels in the descending time period;

[0045] Then through the formula The descending correlation value Mmz of the target channel is calculated.

[0046] As a further solution of the present invention: the rising correlation value Mnz of the target channel and the falling correlation value Mmz of the target channel are summed and averaged to obtain the total flow change correlation value of the target channel.

[0047] Beneficial effects of the present invention: The present invention collects the flow of multiple collection nodes in each channel of the multi-way pneumatic flow multi-way valve, constructs a flow value dynamic curve according to the flow values ​​of the multiple collection nodes in time sequence, obtains the channel flow unstable data, obtains the channel flow abnormal analysis value on each channel according to the channel flow unstable data, and completes the identification of the flow operation state of each channel in the multi-way pneumatic flow multi-way valve;

[0048] Then, by comparing the change time period in the dynamic curve of the flow value of each channel with the corresponding change time period of the other channels, the interference of a single channel in the multi-link pneumatic flow multi-way valve on the other channels is analyzed to obtain the total flow change correlation value corresponding to each channel, and the online evaluation of the channel flow adjustment sequence is completed based on the total flow change correlation value. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The present invention will be further described below in conjunction with the accompanying drawings.

[0050] Figure 1 It is a flowchart of a multi-pneumatic flow multi-way valve flow control system according to an embodiment of the present invention;

[0051] Figure 2 The present invention is a flowchart of a multi-pneumatic flow multi-way valve flow control system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] Example 1

[0054] See also Figure 1-Figure 2 As shown, the present invention is a multi-pneumatic flow multi-way valve flow control system, comprising:

[0055] The flow collection module is used to collect the flow value of each channel at the collection node within the collection period, and integrate the flow values ​​collected by all nodes to obtain a channel flow value group of each channel;

[0056] The channel construction module is used to process the channel flow value group corresponding to each channel, construct a flow value dynamic curve, obtain the channel flow instability data based on the flow value dynamic curve, and obtain the channel flow abnormal analysis value on each channel according to the channel flow instability data;

[0057] Channel division module: The channel division module divides the fluctuation range of the channels of the multi-joint pneumatic flow multi-way valve based on the abnormal analysis value of the channel flow;

[0058] The correlation analysis module is used to compare the change time period in the dynamic curve of the flow value of each channel with the change time period corresponding to the remaining channels, obtain the total flow change correlation value of each channel, and complete the identification of the channel flow adjustment order based on the total flow change correlation value.

[0059] A collection cycle is preset, and the collection cycle is divided into several collection nodes with the same time length;

[0060] The flow value of each channel is collected at the collection node of the collection cycle, and the flow values ​​collected by all nodes are integrated in the order of collection time to obtain a channel flow value group of each channel;

[0061] The flow value on each channel is collected by setting a flow sensor on each channel;

[0062] Based on the channel flow value group of each channel, a plane coordinate system is established with time as the X-axis and flow value as the Y-axis during the acquisition period;

[0063] In the plane coordinate system, the flow value corresponding to each acquisition node is plotted in the plane coordinate system in chronological order, and then all the plotted points are connected from left to right with a smooth curve to obtain the dynamic curve of the flow value corresponding to each channel;

[0064] Obtain the flow rate rating range value corresponding to each channel, and record the flow rate rating upper limit value as the first flow rate value;

[0065] Record the rated lower limit of the flow rate as the second flow rate value;

[0066] Draw a horizontal line parallel to the X-axis at the first flow value in the plane coordinate system, and record it as the first flow boundary;

[0067] Draw a horizontal line parallel to the X-axis at the second flow value in the plane coordinate system, and record it as the second flow boundary;

[0068] Analyze the flow value dynamic curve, the first flow boundary and the second flow boundary;

[0069] The area where the flow value dynamic curve is located above the first flow boundary is recorded as the upper over-boundary area;

[0070] The area where the flow value dynamic curve is located below the second flow boundary is recorded as the lower over-boundary area;

[0071] The upper and lower over-boundary areas are recorded as flow instability areas;

[0072] The area where the flow value dynamic curve is located between the first flow boundary and the second flow boundary is recorded as the flow stable area;

[0073] Process the unstable flow area and the stable flow area to obtain the area value of the unstable flow area and the area value of the stable flow area;

[0074] The area value of the unstable flow area is compared with the area value of the stable flow area to obtain the area ratio of the unstable area.

[0075] Obtain the time length corresponding to each unstable traffic area, sum the time lengths corresponding to all unstable traffic areas, and obtain the unstable traffic duration;

[0076] Obtain the time length corresponding to each flow stable area, sum the time lengths corresponding to all flow stable areas, and obtain the flow stable duration;

[0077] The ratio of the unstable traffic duration to the stable traffic duration is calculated to obtain the unstable area time ratio.

[0078] Obtain the flow values ​​corresponding to all trough points and all peak points in the flow value dynamic curve;

[0079] The flow values ​​corresponding to all trough points are summed and averaged to obtain the minimum flow value of the flow value dynamic curve;

[0080] The flow values ​​corresponding to all the peak points are summed and averaged to obtain the maximum flow value of the flow value dynamic curve;

[0081] The difference between the maximum flow rate and the minimum flow rate is calculated to obtain the flow deviation value of the flow value dynamic curve;

[0082] Calculate the ratio of the flow deviation value to the maximum flow value to obtain the flow deviation ratio;

[0083] The channel flow value group is processed according to the variance calculation formula to obtain the variance value of the channel flow value group;

[0084] Calculate the variance value of the channel flow value group and the flow deviation ratio to obtain the flow deviation square ratio;

[0085] The proportion of unstable area is recorded as Fs;

[0086] The proportion of time in the unstable region is recorded as Ft;

[0087] The flow deviation ratio is recorded as Fp;

[0088] By formula The channel flow anomaly analysis value Fx on each channel is calculated, where a1 and a2 are preset proportional coefficients, and a1 and a2 are both greater than zero.

[0089] See also Figure 2 , the first critical value of the channel flow abnormality analysis value is preset to be Fx1, and the second critical value of the channel flow abnormality analysis value is preset to be Fx2, wherein Fx1<Fx2;

[0090] The channel flow abnormal analysis value Fx is compared with the first critical value Fx1 of the channel flow abnormal analysis value and the second critical value Fx2 of the channel flow abnormal analysis value:

[0091] When Fx<Fx1, the channel in this range is recorded as the third range channel;

[0092] When Fx1≤Fx<Fx2, the channel in this range is recorded as the second range channel;

[0093] When Fx≥Fx2, the channel in this range is recorded as the first range channel;

[0094] When the pneumatic flow multi-way valve is used in the acquisition cycle, the channel flow fluctuation degree in the third range channel is higher than the channel flow fluctuation degree in the second range channel, and the channel flow fluctuation degree in the second range channel is higher than the channel flow fluctuation degree in the first range channel;

[0095] This enables online identification of the degree of fluctuation of each channel based on the abnormal analysis value of the channel flow.

[0096] Example 2

[0097] Record any channel in the multi-way pneumatic flow valve as the target channel;

[0098] Obtain the rising time period corresponding to each rise and the falling time period corresponding to each fall of the target channel in the flow value dynamic curve;

[0099] The rise time corresponding to each rise time period of the target channel is recorded as MS i, where i is the number of the rise time periods, the rise time of the first rise time period is recorded as MS1, the rise time of the first rise time period is recorded as MS2, and so on, the rise time of the i-th rise time period is recorded as MS i;

[0100] The falling time corresponding to each falling time period of the target channel is recorded as Mxj, where j is the number of falling time periods, the rising time of the first falling time period is recorded as Mx1, the rising time of the first falling time period is recorded as Mx2, and so on, the falling time of the jth falling time period is recorded as MSj;

[0101] At the same time, the dynamic curves of the flow values ​​of the remaining channels except the target channel in the multi-way pneumatic flow valve are identified, that is, when the target channel is in the rising time period, the corresponding time length of the remaining channels in the rising time period is obtained and recorded as QS in, n is the number of the remaining channels in the rising time period;

[0102] When the target channel is in the falling time period, the corresponding duration of the remaining channels in the falling time period is obtained and recorded as Qxjm, where m is the number of the remaining channels in the falling time period;

[0103] By formula Calculate the rising coordination value Mn of any remaining channel and the target channel, where n is the number of remaining channels in the rising time period;

[0104] Then through the formula Calculate and obtain the rising correlation value Mnz of the target channel;

[0105] By formula Calculate the descending coordination value Mm of any remaining channel and the target channel, where m is the number of remaining channels in the descending time period;

[0106] Then through the formula Calculate the descending correlation value Mmz of the target channel;

[0107] The rising correlation value Mnz of the target channel and the falling correlation value Mmz of the target channel are summed and averaged to obtain the total flow change correlation value of the target channel;

[0108] According to the total value of the flow change association of the target channel, when adjusting the flow of each channel within the same range of channels, the channel corresponding to the total value of the flow change association is recorded as the priority adjustment object, and so on, to complete the adjustment order of the flow of all channels within the same range of channels.

[0109] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A multi-pneumatic flow multi-way valve flow control system, characterized in that: include: The flow collection module is used to collect the flow value of each channel at the collection node within the collection period, and integrate the flow values ​​collected by all nodes to obtain a channel flow value group of each channel; The channel construction module is used to process the channel flow value group corresponding to each channel, construct a flow value dynamic curve, obtain the channel flow instability data based on the flow value dynamic curve, and obtain the channel flow abnormal analysis value on each channel according to the channel flow instability data; Channel division module: The channel division module divides the fluctuation range of the channels of the multi-joint pneumatic flow multi-way valve based on the abnormal analysis value of the channel flow; The correlation analysis module is used to compare the change time period in the dynamic curve of the flow value of each channel with the change time period corresponding to the remaining channels, obtain the total flow change correlation value of each channel, and complete the identification of the channel flow adjustment order based on the total flow change correlation value.

2. A multi-link pneumatic flow multi-way valve flow control system according to claim 1, characterized in that: During the acquisition cycle, a plane coordinate system is established with time as the X-axis and flow value as the Y-axis; In the plane coordinate system, the flow value corresponding to each acquisition node is plotted in the plane coordinate system in chronological order; Then connect all the drawn points from left to right with a smooth curve to obtain the dynamic curve of the flow value corresponding to each channel.

3. A multi-link pneumatic flow multi-way valve flow control system according to claim 2, characterized in that: Obtain the flow rate rating range value corresponding to each channel, record the flow rate rating upper limit value as the first flow rate value, and record the flow rate rating lower limit value as the second flow rate value; Draw a horizontal line parallel to the X-axis at the first flow value in the plane coordinate system, and record it as the first flow boundary; Draw a horizontal line parallel to the X-axis at the second flow value in the plane coordinate system, and record it as the second flow boundary; The area where the flow value dynamic curve is located above the first flow boundary is recorded as the upper over-boundary area; The area where the flow value dynamic curve is located below the second flow boundary is recorded as the lower over-boundary area; The upper and lower over-boundary areas are recorded as flow instability areas; The area where the flow value dynamic curve is located between the first flow boundary and the second flow boundary is recorded as the flow stable area.

4. A multi-pneumatic flow multi-way valve flow control system according to claim 3, characterized in that: The channel flow non-stationary data includes the non-stationary area area ratio, non-stationary area time ratio and flow deviation square ratio; The proportion of unstable area is recorded as Fs; The proportion of time in the unstable region is recorded as Ft; The flow deviation ratio is recorded as Fp; By formula The channel flow anomaly analysis value Fx on each channel is calculated, where a1 and a2 are preset proportional coefficients.

5. A multi-pneumatic flow multi-way valve flow control system according to claim 4, characterized in that: The process of obtaining the proportion of unstable area is as follows: Obtain the area value of the flow non-stable area and the area value of the flow stable area; The area value of the unstable flow area is ratioed with the area value of the stable flow area to obtain the area ratio of the unstable area.

6. A multi-pneumatic flow multi-way valve flow control system according to claim 4, characterized in that: The process of obtaining the proportion of unstable area is as follows: Obtain the time length corresponding to each unstable traffic area, sum the time lengths corresponding to all unstable traffic areas, and obtain the unstable traffic duration; Obtain the time length corresponding to each flow stable area, sum the time lengths corresponding to all flow stable areas, and obtain the flow stable duration; The ratio of the unstable traffic duration to the stable traffic duration is calculated to obtain the unstable area time ratio.

7. A multi-pneumatic flow multi-way valve flow control system according to claim 4, characterized in that: The process of obtaining the traffic deviation ratio is as follows: The flow values ​​corresponding to all the trough points in the flow value dynamic curve are summed and averaged to obtain the minimum flow value of the flow value dynamic curve; The flow values ​​corresponding to all the peak points in the flow value dynamic curve are summed and averaged to obtain the maximum flow value of the flow value dynamic curve; The difference between the maximum flow value and the minimum flow value is calculated to obtain the flow deviation value of the flow value dynamic curve; Calculate the ratio of the flow deviation value to the maximum flow value to obtain the flow deviation ratio; The variance value of the channel flow value group and the flow deviation ratio are calculated to obtain the flow deviation square ratio.

8. A multi-connection pneumatic flow multi-way valve flow control system according to claim 1, characterized in that: Record any channel in the multi-way pneumatic flow valve as the target channel; The rising time corresponding to each rising time period of the target channel is recorded as MSi, where i is the number of rising time periods, and the corresponding duration of the remaining channels in the rising time period is obtained and recorded as QSin, where n is the number of the remaining channels in the rising time period; By formula Calculate the rising coordination value Mn of any remaining channel and the target channel, where n is the number of remaining channels in the rising time period; Then through the formula The rising correlation value Mnz of the target channel is calculated.

9. A multi-connection pneumatic flow multi-way valve flow control system according to claim 8, characterized in that: The falling time corresponding to each falling time period of the target channel is recorded as Mxj, where j is the number of falling time periods, and the corresponding duration of the remaining channels in the falling time period is obtained and recorded as Qxjm, where m is the number of the remaining channels in the falling time period; By formula Calculate the descending coordination value Mm of any remaining channel and the target channel, where m is the number of remaining channels in the descending time period; Then through the formula The descending correlation value Mmz of the target channel is calculated.

10. A multi-link pneumatic flow multi-way valve flow control system according to claim 9, characterized in that: The rising correlation value Mnz of the target channel and the falling correlation value Mmz of the target channel are summed and averaged to obtain the total flow change correlation value of the target channel.

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