A constant pressure liquid supply control method, device, medium and equipment

Abstract

The present invention discloses a constant pressure liquid supply control method, device, medium and equipment, and relates to the field of equipment automation technology. The present invention not only has a high degree of intelligence, but also realizes unmanned operation underground, saves labor costs and improves safety. The key points of the scheme are: the analog signals of various parameters of the liquid supply pipe are transmitted to the control box; the control box converts the analog signals of various parameters into digital signals; the control box controls the operation of the variable frequency speed regulation integrated machine according to the digital signal values ​​of various parameters and the rated parameter values, so that the various parameters of the liquid supply pipe are consistent with the rated parameter values. The present invention is mainly used in coal mine liquid supply systems.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment automation, and in particular to a constant pressure liquid supply control method, device, medium and equipment. Background Art

[0002] With the continuous improvement of industrial development level, the coal mining industry has continuously improved its requirements for reliability, energy saving, and automation of underground equipment. The existing underground fluid supply system has uncontrollable pressure during the fluid supply process, and requires underground personnel to operate and control gate valves, motors, etc. in real time during use, which occupies labor, and causes unnecessary energy loss during the operation of the equipment. Summary of the invention

[0003] The present invention provides a constant pressure liquid supply control method, device, medium and equipment, which transmit analog signals of various parameters of a liquid supply pipe to a control box; the control box converts the analog signals of various parameters into digital signals; the control box controls the operation of a variable frequency speed regulation integrated machine according to the digital signal values ​​of various parameters and rated parameter values, so that the parameters of the liquid supply pipe are consistent with the rated parameter values. Compared with the prior art, the present invention not only has a high degree of intelligence, but also realizes unmanned operation underground, saves labor costs and improves safety.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme:

[0005] A first aspect of the present invention provides a constant pressure liquid supply control method, comprising:

[0006] The analog signals of various parameters of the liquid supply pipe are transmitted to the control box.

[0007] The control box converts the analog signals of the parameters into digital signals.

[0008] The control box controls the operation of the variable frequency speed regulating integrated machine according to the digital signal value of each parameter and the rated parameter value, so that each parameter of the liquid supply pipe is consistent with the rated parameter value.

[0009] Furthermore, in the constant pressure liquid supply control method, the control box converts the analog signals of the parameters into digital signals, including:

[0010] The control box converts the analog signals of the parameters into digital signals through an internal programmable controller.

[0011] Furthermore, the constant pressure liquid supply control method comprises:

[0012] A proportional-integral-differential controller is added to the internal programmable controller.

[0013] Furthermore, the constant pressure liquid supply control method is characterized by comprising:

[0014] A BP neural network algorithm is added to the proportional-integral-differential controller.

[0015] Furthermore, in the constant pressure liquid supply control method, the BP neural network algorithm includes:

[0016] The input layer of the BP neural network algorithm is: the proportional gain, integral coefficient, differential coefficient in the proportional-integral-differential controller, the rated parameter value, the actual pressure of the liquid supply pipe, and the operating speed of the variable frequency speed regulation integrated machine; the output layer is the dead zone interval; the number of hidden layer parameters is set to 8.

[0017] Furthermore, in the constant pressure liquid supply control method, the BP neural network algorithm includes:

[0018] Build a test tool and record 100 data as a training set.

[0019] Normalize all elements in the training set:

[0020]

[0021] Wherein, x is any element in the training set.

[0022] Calculate the weighted sum of the output values ​​of the j-th unit in the current layer from the elements in the previous layer as the input value of the unit.

[0023]

[0024] In the formula, w i,j is the weight between the two layers of elements, θ j is the deviation value.

[0025] Z j Bring in the activation function:

[0026]

[0027] Get the output value of the unit.

[0028] Similarly:

[0029] Obtain the predicted value O corresponding to the output layer j .

[0030] Reverse calculation of the corresponding weight w i,j , and the deviation θ j .

[0031] Calculate the error value of the output layer:

[0032] Err j =O j(1-O j )(T j -O j )

[0033] Where, T j is the target value, Err is the error value, O j is the predicted value corresponding to the output layer.

[0034] Calculate the error value of the hidden layer:

[0035]

[0036] Where Err is the error value, O j is the predicted value corresponding to the output layer, w i,j is the weight between the two layers of elements.

[0037] Correct the weight w between the two layers of elements i,j , and the deviation θ j :

[0038] Δw i,j =μErr i O j

[0039] w i,j =w i,j +Δw i,j

[0040] Δθ j =μErr j

[0041] θ j =θ j +Δθ j

[0042] In the formula, μ is the learning rate, w i,j is the weight between the two layers of elements, Err is the error value, O j is the predicted value corresponding to the output layer, θ j for deviation;

[0043] Get the weight w between the two layers of elements i,j and the deviation θ j , and imported into the system so that the parameters of the liquid supply pipe are consistent with the rated parameter values.

[0044] A second aspect of the present invention provides a constant pressure liquid supply control device, comprising:

[0045] The transmission unit is used to transmit the analog signals of various parameters of the liquid supply pipe to the control box.

[0046] The conversion unit is used for the control box to convert the analog signal of each parameter into a digital signal.

[0047] A control unit is used for the control box to control the operation of the variable frequency speed regulation integrated machine according to the digital signal value of each parameter and the rated parameter value, so that each parameter of the liquid supply pipe is consistent with the rated parameter value.

[0048] A third aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by one or more processors, the constant pressure liquid supply control method described in any one of the above items is implemented.

[0049] A fourth aspect of the present invention provides an electronic device, comprising: a memory and one or more processors, wherein the memory stores a computer program, and when the computer program is executed by the one or more processors, the constant pressure liquid supply control method described in any one of the above items is implemented.

[0050] The present invention provides a constant pressure liquid supply control method, device, medium and equipment, which transmit analog signals of various parameters of a liquid supply pipe to a control box; the control box converts the analog signals of various parameters into digital signals; the control box controls the operation of a variable frequency speed regulation integrated machine according to the digital signal values ​​of various parameters and rated parameter values, so that the parameters of the liquid supply pipe are consistent with the rated parameter values. Compared with the prior art, the present invention not only has a high degree of intelligence, but also realizes unmanned operation underground, saves labor costs and improves safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. The drawings are only used to illustrate the implementation methods and are not to be considered as limitations of the present invention.

[0052] Figure 1 This is a flow chart of a constant pressure liquid supply control method according to an embodiment of the present invention;

[0053] Figure 2 A schematic diagram of a neural network algorithm flow in a constant pressure liquid supply control method in an embodiment of the present invention;

[0054] Figure 3 This is a schematic diagram of the structure of a constant pressure liquid supply control device in an embodiment of the present invention;

[0055] Figure 4 The figure is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment 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.

[0057] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as commonly understood by technicians in the field of the present invention; the terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings, and are intended to cover non-exclusive inclusions.

[0058] In the description of the embodiments of the present invention, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0059] In the description of the embodiments of the present invention, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0060] In the description of the embodiments of the present invention, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0061] In the description of the embodiments of the present invention, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention.

[0062] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0063] like Figure 1 As shown, an embodiment of the present invention provides a constant pressure liquid supply control method, comprising:

[0064] 101. Transmit analog signals of various parameters of the liquid supply pipe to the control box.

[0065] 102. The control box converts the analog signals of various parameters into digital signals.

[0066] 103. The control box controls the operation of the variable frequency speed regulation integrated machine according to the digital signal value of each parameter and the rated parameter value, so that the parameters of the liquid supply pipe are consistent with the rated parameter value.

[0067] Among them, the parameters include pressure, flow, and liquid level of the water tank. However, during implementation, the implementer can also determine the content, type and quantity of the parameters according to actual needs.

[0068] The variable frequency speed regulating all-in-one machine is an integrated product that integrates frequency converter, motor and electrical control. It integrates explosion-proof technology, high power density motor design and manufacturing technology, power electronics technology, computer control technology, etc. The integrated design of frequency converter and motor and the high power density motor design technology greatly reduce the size of the variable frequency all-in-one machine, making it more adaptable to the narrow space of underground coal mine mining working face.

[0069] In order to better understand the present embodiment, the present embodiment will be explained here in the form of an example: the present embodiment converts the required physical quantity signals such as pipeline pressure, flow, liquid level, etc. into 4-20mA analog signals that can be recognized by the control box through the corresponding signal sensors, and transmits them to the control box.

[0070] After the control box receives the analog signal, the analog-to-digital conversion chip in the control box converts the 4-20mA analog signal into a digital signal, and finally transmits the obtained digital signal to the control unit of the control box, which analyzes and processes these signals.

[0071] After the control unit of the control box receives the required digital signal, it controls the operating state of the entire liquid supply system through the BP neural network algorithm and PID control algorithm added in the control unit. The PID control algorithm is mainly used to adjust the changes in the operating state of the entire pipeline system through the variable frequency speed regulation integrated machine according to the changing trend of the rated parameter value and the actual pressure of the system. However, due to the certain process delay in the operation of the entire system, the simple PID control will have a certain amount of excess adjustment in the control process, causing the swing amplitude of the system pressure to increase. Therefore, the BP neural network control algorithm is added on the basis of the original PID control, and the powerful adaptive learning ability of the BP neural network is used to correct the excess adjustment generated in the PID control process, so as to achieve the purpose of consistency between the adjustment parameters of the liquid supply system and the ideal value, making the operation of the entire system more stable.

[0072] In other embodiments, the control box converts the analog signals of various parameters into digital signals, including:

[0073] The control box converts the analog signals of the parameters into digital signals through an internal programmable controller, a proportional-integral-differential controller is added to the internal programmable controller, and a BP neural network algorithm is added to the proportional-integral-differential controller.

[0074] The input layer of the BP neural network algorithm is: proportional gain, integral coefficient, differential coefficient in the proportional-integral-differential controller, rated parameter value, actual pressure of the liquid supply pipe, and operating speed of the variable frequency speed regulation integrated machine; the output layer is the dead zone interval; the number of hidden layer parameters is set to 8.

[0075] like Figure 2 As shown, the BP neural network algorithm includes:

[0076] 201. Build a test tool and record 100 data as a training set;

[0077] 202. Normalize all elements in the training set:

[0078]

[0079] Wherein, x is any element in the training set;

[0080] 203. Calculate the weighted sum of the output values ​​of the j-th unit in the current layer from the elements in the previous layer as the input value of the unit;

[0081]

[0082] In the formula, w i,j is the weight between the two layers of elements, θ j is the deviation value;

[0083] 204. Z j Bring in the activation function:

[0084]

[0085] Get the output value of the unit;

[0086] Similarly:

[0087] Obtain the predicted value O corresponding to the output layer j ;

[0088] 205. Reversely calculate the corresponding weight w i,j , and the deviation θ j ;

[0089] 206. Calculate the error value of the output layer:

[0090] Err j =O j (1-O j )(T j -O j )

[0091] Where, T j is the target value, Err is the error value, O j is the predicted value corresponding to the output layer;

[0092] 207. Calculate the error value of the hidden layer:

[0093]

[0094] Where Err is the error value, O j is the predicted value corresponding to the output layer, w i,j is the weight between the two layers of elements;

[0095] 208. Modify the weight w between the two layers of elements i,j , and the deviation θ j :

[0096] Δw i,j =μErr i O j

[0097] w i,j =w i,j +Δw i,j

[0098] Δθ j =μErr j

[0099] θ j =θ j+Δθ j

[0100] In the formula, μ is the learning rate, w i,j is the weight between the two layers of elements, Err is the error value, O j is the predicted value corresponding to the output layer, θ j for deviation;

[0101] 209. Obtain the weight w between the two layers of elements i,j and the deviation θ j , and imported into the system so that the parameters of the liquid supply pipe are consistent with the rated parameter values.

[0102] like Figure 3 As shown, an embodiment of the present invention provides a constant pressure liquid supply control device, comprising:

[0103] The transmission unit 31 is used to transmit the analog signals of various parameters of the liquid supply pipe to the control box.

[0104] The conversion unit 32 is used for the control box to convert the analog signal of each parameter into a digital signal.

[0105] The control unit 33 is used for the control box to control the operation of the variable frequency speed regulation integrated machine according to the digital signal value of each parameter and the rated parameter value, so that each parameter of the liquid supply pipe is consistent with the rated parameter value.

[0106] An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by one or more processors, any of the above-mentioned constant-pressure liquid supply control methods is implemented.

[0107] like Figure 4 As shown, an embodiment of the present invention further provides an electronic device 110, comprising: a memory 1101 and one or more processors 1102, wherein the memory 1101 stores a computer program, and when the computer program is executed by the one or more processors, any of the above-mentioned constant pressure liquid supply control methods is implemented.

[0108] The present invention provides a constant pressure liquid supply control method, device, medium and equipment, which transmit analog signals of various parameters of a liquid supply pipe to a control box; the control box converts the analog signals of various parameters into digital signals; the control box controls the operation of a variable frequency speed regulation integrated machine according to the digital signal values ​​of various parameters and rated parameter values, so that the parameters of the liquid supply pipe are consistent with the rated parameter values. Compared with the prior art, the present invention not only has a high degree of intelligence, but also realizes unmanned operation underground, saves labor costs and improves safety.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A constant pressure liquid supply control method, characterized in that: include: Transmit analog signals of various parameters of the liquid supply pipe to the control box; The control box converts the analog signals of the parameters into digital signals; The control box controls the operation of the variable frequency speed regulating integrated machine according to the digital signal value of each parameter and the rated parameter value, so that each parameter of the liquid supply pipe is consistent with the rated parameter value; Wherein, the control box converts the analog signals of the parameters into digital signals, including: The control box converts the analog signals of the parameters into digital signals through an internal programmable controller; Among them, include: A proportional-integral-differential controller is added to the internal programmable controller; Among them, include: A BP neural network algorithm is added to the proportional-integral-differential controller, and the BP neural network algorithm is used to correct the output signal of the proportional-integral-differential controller; Wherein, the BP neural network algorithm includes: The input layer of the BP neural network algorithm is: proportional gain, integral coefficient, differential coefficient in the proportional-integral-differential controller, rated parameter value, actual pressure of the liquid supply pipe, and operating speed of the variable frequency speed regulation integrated machine; the output layer is the dead zone interval; the number of hidden layer parameters is set to 8; Wherein, the BP neural network algorithm includes: Build a test tool and record 100 data as a training set; Normalize all elements in the training set: ， In the formula, is any element in the training set, is the i-th normalized element; Calculate the weighted sum of the output values ​​of the j-th unit in the current layer from the elements in the previous layer as the input value of the unit; ， In the formula, is the weight between the two layers of elements, for deviation; Will Bring in the activation function: ， Get the output value of the unit; Similarly: Get the predicted value corresponding to the output layer ; Reverse calculation of the corresponding weight , and the deviation ; Calculate the error value of the output layer : ， In the formula, is the target value; Calculate the error value of the hidden layer : ， In the formula, is the predicted value corresponding to the hidden layer; Correct the weights between the two layers of elements , and the deviation : ， ， ， ， In the formula, is the learning rate, is the weight between the two layers of elements after correction, is the corrected deviation; Get the modified weights between the two layers of elements and the corrected deviation , and imported into the system so that the parameters of the liquid supply pipe are consistent with the rated parameter values.

2. A constant pressure liquid supply control device, characterized in that: include: A transmission unit, used for transmitting analog signals of various parameters of the liquid supply pipe to the control box; A conversion unit, used for the control box to convert the analog signal of each parameter into a digital signal; A control unit, used for the control box to control the operation of the variable frequency speed regulating integrated machine according to the digital signal value of each parameter and the rated parameter value, so that each parameter of the liquid supply pipe is consistent with the rated parameter value; Wherein, the control box converts the analog signals of the parameters into digital signals, including: The control box converts the analog signals of the parameters into digital signals through an internal programmable controller; Among them, include: A proportional-integral-differential controller is added to the internal programmable controller; Among them, include: A BP neural network algorithm is added to the proportional-integral-differential controller, and the BP neural network algorithm is used to correct the output signal of the proportional-integral-differential controller; Wherein, the BP neural network algorithm includes: The input layer of the BP neural network algorithm is: proportional gain, integral coefficient, differential coefficient in the proportional-integral-differential controller, rated parameter value, actual pressure of the liquid supply pipe, and operating speed of the variable frequency speed regulation integrated machine; the output layer is the dead zone interval; the number of hidden layer parameters is set to 8; Wherein, the BP neural network algorithm includes: Build a test tool and record 100 data as a training set; Normalize all elements in the training set: ， In the formula, is any element in the training set, is the i-th normalized element; Calculate the weighted sum of the output values ​​of the j-th unit in the current layer from the elements in the previous layer as the input value of the unit; ， In the formula, is the weight between the two layers of elements, for deviation; Will Bring in the activation function: ， Get the output value of the unit; Similarly: Get the predicted value corresponding to the output layer ; Reverse calculation of the corresponding weight , and the deviation ; Calculate the error value of the output layer : ， In the formula, is the target value; Calculate the error value of the hidden layer : ， In the formula, is the predicted value corresponding to the hidden layer; Correct the weights between the two layers of elements , and the deviation : ， ， ， ， In the formula, is the learning rate, is the weight between the two layers of elements after correction, is the corrected deviation; Get the modified weights between the two layers of elements and the corrected deviation , and imported into the system so that the parameters of the liquid supply pipe are consistent with the rated parameter values.

3. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by one or more processors, the constant-pressure liquid supply control method as claimed in claim 1 is implemented.

4. An electronic device, characterized in that: include: A memory and one or more processors, wherein the memory stores a computer program, and when the computer program is executed by the one or more processors, the constant pressure liquid supply control method as claimed in claim 1 is implemented.

Images