CN112000155A - Liquid filling control method, device and system - Google Patents

Liquid filling control method, device and system Download PDF

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Publication number
CN112000155A
CN112000155A CN202010706480.9A CN202010706480A CN112000155A CN 112000155 A CN112000155 A CN 112000155A CN 202010706480 A CN202010706480 A CN 202010706480A CN 112000155 A CN112000155 A CN 112000155A
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China
Prior art keywords
liquid
control
liquid level
control signal
pump
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CN202010706480.9A
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Chinese (zh)
Inventor
贾立山
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Civil Aviation University of China
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Civil Aviation University of China
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Application filed by Civil Aviation University of China filed Critical Civil Aviation University of China
Priority to CN202010706480.9A priority Critical patent/CN112000155A/en
Publication of CN112000155A publication Critical patent/CN112000155A/en
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D27/00Simultaneous control of variables covered by two or more of the preceding main groups
    • G05D27/02Simultaneous control of variables covered by two or more of the preceding main groups characterised by the use of electric means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01GWEIGHING
    • G01G19/00Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/52Weighing apparatus combined with other objects, e.g. furniture

Abstract

The invention discloses a liquid filling control method, a device and a system, wherein the liquid filling control device comprises: the liquid level image acquisition module comprises at least one infrared camera and is used for acquiring a liquid level image in the liquid barrel through the infrared camera and sending the acquired liquid level image to the industrial personal computer so that the industrial personal computer performs liquid level identification on the liquid level image and sends a control signal to the perfusion control module according to the identified liquid level; and the filling control module is positioned on a connecting pipeline between the liquid storage tank and the liquid barrel and used for controlling the liquid conveying on the connecting pipeline according to the control signal received from the industrial personal computer. The invention can realize liquid filling control under the conditions of unknown container capacity, transparent or opaque container and unknown container weight and volume correlation, and the applied liquid filling scene is wider.

Description

Liquid filling control method, device and system
Technical Field
The invention relates to the technical field of liquid storage and transportation, in particular to a liquid filling control method, a device and a system.
Background
At present, in many occasions, the liquid to be used needs to be filled into a liquid tank for storage, and the liquid is led out from an output port of the liquid tank by controlling a liquid output valve when in use. Wherein during filling of the liquid in the liquid tank, the liquid is filled into the liquid tank by opening the liquid input valve. The filled liquid volume needs to be monitored in real time in the filling process of the liquid tank, and when the specified volume is reached, the liquid input valve is closed.
The existing liquid tank filling system mainly adopts the following modes to monitor the liquid capacity in the liquid tank:
1) measuring the perfusion flow and perfusion time in unit time, thereby calculating the total perfusion amount, and determining the opening and closing of a valve according to the total perfusion amount;
this monitoring method is only applicable to a container of a predetermined capacity, and when the capacity of the container is unknown, the monitoring of the liquid capacity in the tank cannot be performed by this method.
2) Using a photon emitting source and a photon receiver;
the photon emission source and the photon receiver are installed at a designated position. When the liquid level does not reach the position, the photon receiver can receive the photons. When the liquid level reaches this position, the photons are blocked by the liquid and cannot be received, thereby monitoring whether the perfusion liquid can reach the specified level.
This monitoring method is only suitable for liquid filling of transparent containers, but cannot be applied to liquid filling monitoring of opaque containers.
3) Controlling the filling work by using the weight of the container;
designing a corresponding circuit to monitor the weight of the liquid tank in the liquid filling process, and opening a control valve to fill when the weight of the liquid tank does not reach a specified value; when the weight of the liquid tank reaches a specified value, the control valve is closed, and the filling is stopped.
This monitoring method is only suitable for situations where there is a fixed correlation between capacity and weight, but not for situations where the relationship is random.
4) An ultrasonic sensor is adopted;
in the liquid filling process, ultrasonic waves are transmitted to the liquid level in the liquid tank through the ultrasonic sensor, and the position of the liquid level is judged according to the returning time of the ultrasonic waves, but the mode is easily interfered by liquid fluctuation.
In summary, the existing filling methods all have certain disadvantages, and it is necessary to provide a liquid filling scheme with wider application range.
Disclosure of Invention
The invention provides a liquid filling control method, a device and a system, which are used for solving the problem that the liquid filling control cannot be carried out under the conditions that the container capacity is unknown, the container is transparent or opaque and the correlation between the container weight and the container volume is unknown in the conventional liquid filling method. The technical scheme of the invention is as follows:
according to a first aspect of embodiments of the present invention, there is provided a liquid perfusion control device, the device comprising:
the liquid level image acquisition module comprises at least one infrared camera and is used for acquiring a liquid level image in the liquid barrel through the infrared camera and sending the acquired liquid level image to the industrial personal computer so that the industrial personal computer performs liquid level identification on the liquid level image and sends a control signal to the perfusion control module according to the identified liquid level;
and the filling control module is positioned on a connecting pipeline between the liquid storage tank and the liquid barrel and used for controlling the liquid conveying on the connecting pipeline according to the control signal received from the industrial personal computer.
As a possible implementation, the perfusion control module comprises:
the control valve is used for adjusting the flow of the conveyed liquid according to a valve control signal in the liquid conveying process and stopping the liquid conveying when the liquid level reaches a specified position; and/or
The liquid level control system comprises a conveying pump and a pump controller, wherein the pump controller is used for adjusting the flow of liquid conveyed by the conveying pump according to a pump control signal in the liquid conveying process, and closing the conveying pump when the liquid level reaches a specified position according to a stop control signal.
As a possible implementation manner, when the perfusion control module comprises a control valve, a delivery pump and a pump controller, one end of the delivery pump is connected with the liquid tank, the other end of the delivery pump is connected with the control valve, one end of the control valve is connected with the delivery pump, and the other end of the control valve is connected with the injection port of the liquid barrel.
As a possible embodiment, the at least one infrared camera is arranged on a sealing joint which is connected with the liquid barrel in a sealing way, and is positioned on one side of the sealing joint facing the liquid barrel.
As a possible embodiment, the delivery pump controller adjusts the flow rate of the delivery pump by controlling the rotation speed of the motor; or the conveying pump controller adjusts the flow rate of the conveying pump in a pneumatic control mode.
In a second aspect, an embodiment of the present invention provides a liquid perfusion control method, including:
receiving a liquid level image shot by an infrared camera;
and carrying out liquid level identification on the liquid level image, and sending a control signal to a perfusion control module according to the identified liquid level so that the perfusion control module controls liquid conveying on the connecting pipeline according to the control signal received from the industrial personal computer.
As a possible implementation, sending a control signal to the perfusion control module according to the identified liquid level comprises:
when the current conveying amount needs to be adjusted according to the identified liquid level, sending a valve control signal to the control valve to control the flow adjustment of the conveyed liquid, and sending a valve control signal to the control valve to control the stop of liquid conveying when the liquid level is determined to reach the designated position; and/or
And when the liquid level is determined to reach the specified position, sending a pump control signal to the pump controller to control the liquid conveying to stop.
As a possible embodiment, the method for controlling the flow rate adjustment of the liquid to be delivered by sending a valve control signal to the control valve/a pump control signal to a pump controller includes:
carrying out image analysis on the liquid level image to determine whether a sputtering area exists and the area of the sputtering area;
and when the sputtering area is determined to exist and the area of the sputtering area is larger than the preset area, sending a valve control signal to the control valve/sending a pump control signal to a pump controller, and reducing the flow of the currently conveyed liquid.
As a possible embodiment, the method for controlling the flow rate adjustment of the liquid to be delivered by sending a valve control signal to the control valve/a pump control signal to a pump controller includes:
and sending a valve control signal to the control valve/a pump control signal to a pump controller according to the change of the range of the identified liquid level, so as to reduce the flow rate of the currently conveyed liquid.
In a third aspect, an embodiment of the present invention provides a liquid filling control device, including:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the method steps of:
receiving a liquid level image shot by an infrared camera;
and carrying out liquid level identification on the liquid level image, and sending a control signal to a perfusion control module according to the identified liquid level so that the perfusion control module controls liquid conveying on the connecting pipeline according to the control signal received from the industrial personal computer.
As a possible implementation, the processor sends a control signal to the perfusion control module according to the identified liquid level, including:
when the current conveying amount needs to be adjusted according to the identified liquid level, sending a valve control signal to the control valve to control the flow adjustment of the conveyed liquid, and sending a valve control signal to the control valve to control the stop of liquid conveying when the liquid level is determined to reach the designated position; and/or
And when the liquid level is determined to reach the specified position, sending a pump control signal to the pump controller to control the liquid conveying to stop.
As a possible embodiment, the processor sends a valve control signal to the control valve/a pump control signal to a pump controller to control the flow rate adjustment of the liquid to be delivered, and the method includes:
carrying out image analysis on the liquid level image to determine whether a sputtering area exists and the area of the sputtering area;
and when the sputtering area is determined to exist and the area of the sputtering area is larger than the preset area, sending a valve control signal to the control valve/sending a pump control signal to a pump controller, and reducing the flow of the currently conveyed liquid.
As a possible embodiment, the processor sends a valve control signal to the control valve/a pump control signal to a pump controller to control the flow rate adjustment of the liquid to be delivered, and the method includes:
and sending a valve control signal to the control valve/a pump control signal to a pump controller according to the change of the range of the identified liquid level, so as to reduce the flow rate of the currently conveyed liquid.
In a fourth aspect, an embodiment of the present invention provides a liquid filling control device, including:
the image receiving unit is used for receiving the liquid level image shot by the infrared camera;
and the control unit is used for carrying out liquid level identification on the liquid level image and sending a control signal to the perfusion control module according to the identified liquid level so that the perfusion control module controls the liquid conveying on the connecting pipeline according to the control signal received from the industrial personal computer.
As a possible implementation, the control unit sends a control signal to the perfusion control module according to the identified liquid level, including:
when the current conveying amount needs to be adjusted according to the identified liquid level, sending a valve control signal to the control valve to control the flow adjustment of the conveyed liquid, and sending a valve control signal to the control valve to control the stop of liquid conveying when the liquid level is determined to reach the designated position; and/or
And when the liquid level is determined to reach the specified position, sending a pump control signal to the pump controller to control the liquid conveying to stop.
As a possible embodiment, the control unit sends a valve control signal to the control valve/a pump control signal to a pump controller to control the flow rate adjustment of the liquid to be delivered, and the control unit comprises:
carrying out image analysis on the liquid level image to determine whether a sputtering area exists and the area of the sputtering area;
and when the sputtering area is determined to exist and the area of the sputtering area is larger than the preset area, sending a valve control signal to the control valve/sending a pump control signal to a pump controller, and reducing the flow of the currently conveyed liquid.
As a possible embodiment, the control unit sends a valve control signal to the control valve/a pump control signal to a pump controller to control the flow rate adjustment of the liquid to be delivered, and the control unit comprises:
and sending a valve control signal to the control valve/a pump control signal to a pump controller according to the change of the range of the identified liquid level, so as to reduce the flow rate of the currently conveyed liquid.
In a fifth aspect, an embodiment of the present invention provides a liquid filling system, including:
the liquid storage tank is used for storing liquid and outputting the liquid through the conveying port;
the liquid barrel is used for storing liquid and filling the liquid through the injection port;
the liquid filling control device according to the first aspect;
the industrial personal computer is used for receiving the liquid level image sent by the infrared camera, identifying the liquid level of the liquid level image, and sending a control signal to the perfusion control module according to the identified liquid level, so that the perfusion control module controls the liquid conveying on the connecting pipeline according to the control signal received by the industrial personal computer.
In a sixth aspect, embodiments of the present invention provide a computer program storage medium, wherein instructions, when executed by a computer processor, enable the computer processor to perform the liquid perfusion control method provided in the second aspect.
The technical scheme provided by the embodiment of the invention at least has the following beneficial effects:
the embodiment of the invention provides a scheme for controlling liquid filling under the conditions of unknown container capacity, transparent or opaque container, and unknown container weight and volume correlation, and can be applied to more liquid filling scenes.
Drawings
FIG. 1 is a schematic diagram of a liquid perfusion control system according to an exemplary embodiment;
FIG. 2 is a detailed structural schematic diagram of a liquid perfusion control system according to an exemplary embodiment;
FIG. 3 is a flow chart illustrating a method of liquid perfusion control according to an exemplary embodiment;
FIG. 4 is a block diagram illustrating a liquid perfusion control device according to an exemplary embodiment;
FIG. 5 is a schematic diagram illustrating another fluid perfusion control configuration according to an exemplary embodiment.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Hereinafter, some terms in the embodiments of the present invention are explained to facilitate understanding by those skilled in the art.
(1) The term "and/or" in the embodiments of the present invention describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
(2) The term 'embedded industrial control computer' in the embodiment of the invention is applicable to industrial control, takes application as a center, takes computer technology as a basis, can cut software and hardware, is applicable to a special computer system with strict requirements on functions, reliability, cost, volume and power consumption of an application system, and generally comprises four parts of an embedded microprocessor, peripheral hardware equipment, an embedded operating system, an application program of a user and the like.
(3) The term "infrared camera" in the embodiment of the present invention refers to a camera with a night vision function that can be used at night or in a dark environment. The working principle of the infrared camera is that an infrared light beam emitted by an infrared lamp irradiates an object, the infrared light beam is subjected to diffuse reflection and is received by the monitoring camera to form a video image, and the infrared camera is characterized by being capable of being used in daytime and at night.
(4) The term "liquid" in the embodiment of the present invention refers to flammable and explosive liquid, and may be a toluene alcohol cleaning solution, where the toluene alcohol cleaning solution includes solvents such as toluene, alcohol, a regeneration solution, BYK, MS, NE0-T, G260, S/P, etc. as cleaning auxiliaries, and each solvent corresponds to at least one cleaning solution storage and transportation device.
At present, in a storage and conveying system of flammable and explosive liquid, the liquid is required to be filled into a liquid barrel from a liquid storage tank, and in the liquid filling process, whether the liquid barrel reaches a specified position or not is monitored, and the filling is stopped, so that the proper liquid capacity in the liquid barrel is ensured.
In view of the drawbacks of the prior liquid filling schemes, an embodiment of the present invention provides a liquid filling control system, as shown in fig. 1, the system includes:
a liquid storage tank 101 for storing liquid and outputting the liquid through a delivery port;
the delivery opening of the liquid reservoir may be located at the bottom of the liquid reservoir, but may of course be located at other locations of the liquid reservoir, such as on a side wall.
The delivery port of the liquid reservoir may have a control valve by which whether the liquid reservoir delivers liquid may be controlled.
A liquid tank 102 for storing liquid and filling the liquid through the injection port;
the liquid barrel in the embodiment can be a liquid barrel which is convenient to transport after being filled, and of course, the liquid barrel can also be a liquid barrel for field use, and if the liquid barrel is a liquid barrel for field use, the liquid can be further output through the outlet on the liquid barrel for field use. The liquid barrel can adopt a structural mode of conveniently pouring out liquid, and the specific application place and the structure of the liquid barrel are not limited by the embodiment.
The liquid barrel is provided with an injection port, and the position of the injection port is different according to the structure of the liquid barrel.
In an alternative embodiment, the liquid barrel has an opening structure, and the filling opening may be located on a side wall of the liquid barrel.
As another optional embodiment, the liquid barrel is an integrated closed cavity with an injection port, that is, the liquid barrel is a closed cavity with only an injection port, and the injection port may be a top position of the liquid barrel or a side wall position of the cavity.
As another alternative embodiment, the liquid barrel is a split-type sealed cavity with a sealing head, that is, the sealing joint is connected with the liquid barrel in a sealing manner, the sealing joint is in a cap-shaped structure, and the injection port is an opening on the sealing joint.
The liquid filling control device 103 includes the following modules:
the liquid image acquisition module 1031 comprises at least one infrared camera, and is used for acquiring a liquid level image in the liquid barrel through the infrared camera, sending the acquired liquid level image to an industrial personal computer, so that the industrial personal computer performs liquid level identification on the liquid level image, and sending a control signal to the perfusion control module according to the identified liquid level;
the infrared camera is not limited by dark light in the liquid barrel due to the night vision function, and the infrared camera is used for image shooting in the embodiment, the image shooting function can be applied, and image collection is carried out at a preset sampling frequency interval. The sampling interval can be set according to the size of the liquid barrel, if the capacity of the liquid barrel is larger, the sampling interval can be larger, and if the capacity of the liquid barrel is smaller, the sampling interval can be smaller. Of course, the video capture function can also be applied, and the sampling interval of the video stream is fixedly adopted for image data capture.
As an optional implementation manner, the number of the infrared cameras is determined according to whether a clear global image in the liquid barrel can be shot, one infrared camera may be arranged to acquire the global image in the liquid barrel, or a plurality of infrared cameras may be arranged to shoot images in the liquid barrel from multiple angles.
The arrangement position of the infrared camera is related to the structure of the liquid barrel, if the liquid barrel adopts an opening structure, the infrared camera can be arranged on the inner side wall of the liquid barrel, and a plurality of infrared cameras can be distributed and arranged on the periphery of the side wall; if the liquid barrel adopts an integrated sealed cavity structure, one infrared camera can be arranged at the top of the liquid barrel, faces the inner side of the liquid barrel and can be arranged at the central position to ensure that a global image is shot; if the liquid barrel adopts a split type sealing cavity structure, the infrared camera can be arranged on the sealing joint which is connected with the liquid barrel in a sealing way and is positioned on one side of the sealing joint facing the liquid barrel.
And the filling control module 1032 is positioned on a connecting pipeline between the liquid storage tank and the liquid barrel and used for controlling liquid conveying on the connecting pipeline according to a control signal received from the industrial personal computer.
One of the control signals is used for controlling to stop liquid delivery when the liquid level in the liquid barrel reaches a designated position, the filling control module has a filling control function, is connected with the industrial personal computer in a networking mode, and performs corresponding filling control according to the control signal received from the industrial personal computer, for example, the pipeline is communicated to start liquid delivery filling, and the pipeline is closed to stop filling.
The industrial personal computer 104 is used for receiving liquid level images shot through the infrared camera, recognizing the liquid level images, and sending control signals to the filling control module according to the recognized liquid level, so that the filling control module controls liquid conveying on the connecting pipeline according to the control signals received by the industrial personal computer.
The industrial control computer passes through above-mentioned infrared camera of network connection and fills control module in this embodiment, when receiving the image from infrared camera, through the liquid level in the image analysis technique discernment liquid bucket. Because the liquid level has obvious handing-over line with the inner wall of liquid bucket in the liquid bucket, consequently can carry out image feature data to the liquid level image and draw, utilize the position of handing-over line in the characteristic matching method analysis image, through the image distance of the position apart from liquid bucket top edge of analysis handing-over line, the actual distance of liquid level apart from the liquid bucket top in the analysis liquid bucket, thereby can be according to the total depth of the liquid bucket that sets up in advance, confirm the liquid capacity that has filled at present, confirm whether the liquid level in the bucket reaches appointed liquid level. The designated liquid level can be the maximum capacity of the liquid barrel, and can also be a liquid level corresponding to the capacity of the liquid barrel required to be filled by a user according to the requirement.
If the number of the infrared cameras is one, the industrial personal computer performs the analysis according to the global image, if the number of the infrared cameras is multiple, the industrial personal computer synthesizes a plurality of images acquired at the same time to obtain a global image, and performs the analysis on the synthesized global image.
The perfusion control module can be controlled by adopting a control valve and/or a delivery pump and a pump controller, and the specific structure and the control mode are as follows:
1) the perfusion control module is controlled by adopting a control valve
When the control valve is adopted for control, one end of the control valve is connected with the conveying port of the liquid storage tank, and the other end of the control valve is connected with the injection port of the liquid barrel and is connected with the industrial personal computer in a network connection mode.
The industrial computer carries out image analysis to the image of gathering, can carry out corresponding control according to the liquid level that the analysis goes out, and the industrial computer can send various valve control signal to the control valve, and one of them valve control signal is for stopping carrying the signal, when monitoring liquid level arrival appointed liquid level in the liquid bucket promptly, sends to the control valve and stops carrying the control signal, and the control valve receives this and stops carrying behind the control signal, closes the valve to cut off liquid and carry in the liquid bucket.
The valve control signal may also be a flow control signal for controlling the flow of the valve, where the flow control signal may adjust the flow of the control valve, specifically, may be adjustment of the valve direction and the valve opening degree.
The method is suitable for the liquid perfusion scene adopting the gravity action to perform liquid perfusion.
2) The perfusion control module adopts a delivery pump and a pump controller
The industrial computer carries out image analysis to the image of gathering, can carry out corresponding control according to the liquid level that the analysis goes out, and the industrial computer can send various pump control signals to the pump controller, and one of them pump control signal is for stopping transport signal, when monitoring liquid level arrival appointed liquid level in the liquid bucket promptly, sends to the pump controller and stops transport control signal, and control valve receives this and stops behind the transport control signal, and control delivery pump closes to cut off in liquid transport liquid bucket.
The conveying pump controller adjusts the flow of the conveying pump by controlling the rotating speed of the motor; or the conveying pump controller adjusts the flow rate of the conveying pump in a pneumatic control mode.
3) The perfusion control module adopts the cooperation control of a control valve, a delivery pump and a pump controller
The mode is the combination control mode of above-mentioned two kinds of modes, and the industrial computer carries out image analysis to the image of gathering, can carry out corresponding control according to the liquid level that the analysis goes out, and the industrial computer can send various control signals to pump controller and control flap simultaneously.
When flow adjustment is needed, the pressure of the delivery pump is increased through the pump controller, and meanwhile the pressure of the control valve is required to be increased through simultaneous control, so that the pressure between the two control devices is matched, and the phenomenon that the pressure of the liquid barrel is too large or too small can be avoided. When the liquid conveying is required to be closed when the specified liquid level is reached, a stop signal is sent to the control valve and the pump control at the same time, the liquid conveying on the connecting pipeline is blocked in time, and meanwhile, the residual liquid after the conveying pump is turned off is prevented from flowing into the liquid barrel.
As shown in fig. 2, a detailed structure diagram of the liquid filling system in this embodiment is shown, and the system includes: embedded industrial control computer 201, pump controller 202, delivery pump 203, control valve 204, sealing joint 205, liquid bucket 206, be provided with miniature infrared camera 2051 and nozzle 2052 on the sealing joint 205, delivery pump 203 is connected with liquid storage tank 200, wherein:
the infusion process is carried out using a delivery pump 203, and the flow rate of the delivery pump 203 is controlled by a pump controller 202. For ordinary liquid, the delivery pump 203 can be driven by a motor, and the pump controller 202 adjusts the flow rate of the delivery pump 203 by controlling the rotation speed of the motor. For flammable and explosive liquids, the delivery pump 203 may be pneumatically controlled, and the pump controller 202 may regulate the flow rate of the delivery pump 203 by controlling the amount of intake air.
The nozzle 2052 and the liquid barrel 206 are connected by a sealing joint 205, and the sealing joint 205 can be connected by a flange or a thread connection with an inner sealing sleeve. Of course, the connection mode of the sealing joint is not limited to the two modes of threaded connection and flange connection, and other connection modes can be adopted in the implementation. In order to detect the level of liquid in the liquid tank 206, a micro infrared camera 2051 is embedded in the sealing joint 205. For flammable and explosive liquids, the miniature infrared camera 2051 may be of a special explosion-proof design. The miniature infrared camera 2051 is used to acquire images of the liquid level in the liquid barrel 206. Because an infrared camera is used, the liquid level image can still be acquired although the interior of the liquid barrel 206 is dark.
The liquid level image is transmitted to the embedded industrial control computer 201 through a communication line, the embedded industrial control computer 201 judges the liquid level position through image recognition, and a control signal of the pump controller 202 is obtained through calculation according to the liquid level position and is transmitted to the pump controller 202. Thus, the system can automatically stop the liquid filling when the liquid level in the liquid barrel 206 reaches a specified value. Meanwhile, the embedded industrial control computer 201 can also automatically calculate the flow of the delivery pump 203 according to the size of the liquid splash in the liquid level image, wherein the flow is the maximum flow under the condition that the definition of the liquid level image meets the requirement. The embedded industrial control computer 201 outputs a corresponding control signal according to the calculated flow rate of the delivery pump, and the pump controller 202 adjusts the flow rate of the delivery pump 203 according to the control signal. The embedded industrial control computer 201 also outputs a control signal to the control valve 204 of the pipeline, the pressure of the control valve 204 is adapted to the pressure of the delivery pump 203 when the flow adjustment is performed, the control valve 204 is also controlled to stop delivering when the control pump controller stops delivering, and the control valve 204 can comprise a directional control valve, a pressure control valve and a flow control valve, and the control valve is used for disconnecting the pipeline, regulating the pressure and regulating the flow.
Based on the liquid filling control system, an embodiment of the present invention further provides a liquid filling control method, where the method is applied to the industrial personal computer, and as shown in fig. 3, the method includes:
step 301, receiving a liquid level image shot by an infrared camera;
the received liquid images can be liquid level images continuously acquired by one infrared camera or continuous images acquired by a plurality of infrared cameras.
And 302, carrying out liquid level identification on the liquid level image, and sending a control signal to a perfusion control module according to the identified liquid level so that the perfusion control module controls liquid conveying on the connecting pipeline according to the control signal received from the industrial personal computer.
The industrial control computer passes through above-mentioned infrared camera of network connection and fills control module in this embodiment, when receiving the image from infrared camera, through the liquid level in the image analysis technique discernment liquid bucket. Because the liquid level has obvious handing-over line with the inner wall of liquid bucket in the liquid bucket, consequently can carry out image feature data to the liquid level image and draw, utilize the position of handing-over line in the characteristic matching method analysis image, through the image distance of the position apart from liquid bucket top edge of analysis handing-over line, the actual distance of liquid level apart from the liquid bucket top in the analysis liquid bucket, thereby can be according to the total depth of the liquid bucket that sets up in advance, confirm the liquid capacity that has filled at present, confirm whether the liquid level in the bucket reaches appointed liquid level. The designated liquid level can be the maximum capacity of the liquid barrel, and can also be a liquid level corresponding to the capacity of the liquid barrel required to be filled by a user according to the requirement.
As an alternative embodiment, the control signal is sent to the perfusion control module according to the identified liquid level, and may be a control valve and/or a pump controller, and the specific control manner is as follows:
1) when the current conveying amount needs to be adjusted according to the identified liquid level, sending a valve control signal to the control valve to control the flow adjustment of the conveyed liquid, and sending a valve control signal to the control valve to control the stop of liquid conveying when the liquid level is determined to reach the designated position;
2) and when the liquid level is determined to reach the specified position, sending a pump control signal to the pump controller to control the liquid conveying to stop.
3) When the current conveying amount needs to be adjusted according to the identified liquid level, sending a valve control signal to the control valve to control the flow adjustment of the conveyed liquid, and sending a valve control signal to the control valve to control the stop of liquid conveying when the liquid level is determined to reach the designated position; and when the liquid level is determined to reach the specified position, sending a pump control signal to the pump controller to control the liquid conveying to stop.
The specific control modes of the above three modes can be referred to the description of relevant parts in the liquid perfusion control system, and are not repeated here.
As an alternative embodiment, sending a valve control signal to the control valve/a pump control signal to a pump controller to control the flow adjustment of the delivered liquid includes:
carrying out image analysis on the liquid level image to determine whether a sputtering area exists and the area of the sputtering area;
and when the sputtering area is determined to exist and the area of the sputtering area is larger than the preset area, sending a valve control signal to the control valve/sending a pump control signal to a pump controller, and reducing the flow of the currently conveyed liquid.
In the process of liquid filling, as the liquid level changes, sputtering of different degrees can be caused, water splash generated by sputtering can obscure the acquired liquid level image, accurate liquid level can not be identified, and the embodiment determines whether the water splash exists by determining whether a sputtering area exists. The size of the splash is determined through the area of the sputtering area, if the splash is too large, the flow in unit time of the liquid needs to be reduced, a clear liquid level image is guaranteed to be shot, and the identification result of the liquid level image is more accurate.
As an alternative embodiment, sending a valve control signal to the control valve/a pump control signal to a pump controller to control the flow adjustment of the delivered liquid includes:
and sending a valve control signal to the control valve/a pump control signal to a pump controller according to the change of the range of the identified liquid level, so as to reduce the flow rate of the currently conveyed liquid.
In the liquid filling process, the liquid level can be divided into different numerical value ranges in advance, the higher the liquid level is, the closer the liquid level is to the specified position, the liquid flow in unit time needs to be properly reduced, the overfilling of the liquid is avoided, and the lower the liquid level is, the farther the liquid level is from the specified liquid level, the liquid flow in unit time can be properly increased.
Of course, the above-described flow rate adjustment according to the range of the liquid level may be implemented in combination with the above-described flow rate adjustment according to the sputtering region. The problem that the liquid level detection result is possibly inaccurate due to the fact that the sputtering area is too large when the liquid flow is too large is avoided.
As shown in fig. 4, an embodiment of the present invention provides a liquid filling control device 400, including:
a processor 410;
a memory 420 for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the method steps of:
receiving a liquid level image shot by an infrared camera;
and carrying out liquid level identification on the liquid level image, and sending a control signal to a perfusion control module according to the identified liquid level so that the perfusion control module controls liquid conveying on the connecting pipeline according to the control signal received from the industrial personal computer.
As a possible implementation, the processor sends a control signal to the perfusion control module according to the identified liquid level, including:
when the current conveying amount needs to be adjusted according to the identified liquid level, sending a valve control signal to the control valve to control the flow adjustment of the conveyed liquid, and sending a valve control signal to the control valve to control the stop of liquid conveying when the liquid level is determined to reach the designated position; and/or
And when the liquid level is determined to reach the specified position, sending a pump control signal to the pump controller to control the liquid conveying to stop.
As a possible embodiment, the processor sends a valve control signal to the control valve/a pump control signal to a pump controller to control the flow rate adjustment of the liquid to be delivered, and the method includes:
carrying out image analysis on the liquid level image to determine whether a sputtering area exists and the area of the sputtering area;
and when the sputtering area is determined to exist and the area of the sputtering area is larger than the preset area, sending a valve control signal to the control valve/sending a pump control signal to a pump controller, and reducing the flow of the currently conveyed liquid.
As a possible embodiment, the processor sends a valve control signal to the control valve/a pump control signal to a pump controller to control the flow rate adjustment of the liquid to be delivered, and the method includes:
and sending a valve control signal to the control valve/a pump control signal to a pump controller according to the change of the range of the identified liquid level, so as to reduce the flow rate of the currently conveyed liquid.
As shown in fig. 5, an embodiment of the present invention provides a liquid filling control device, including:
an image receiving unit 501, configured to receive a liquid level image captured by an infrared camera;
and the control unit 502 is used for carrying out liquid level identification on the liquid level image and sending a control signal to the perfusion control module according to the identified liquid level so that the perfusion control module controls liquid conveying on the connecting pipeline according to the control signal received from the industrial personal computer.
As a possible implementation, the control unit sends a control signal to the perfusion control module according to the identified liquid level, including:
when the current conveying amount needs to be adjusted according to the identified liquid level, sending a valve control signal to the control valve to control the flow adjustment of the conveyed liquid, and sending a valve control signal to the control valve to control the stop of liquid conveying when the liquid level is determined to reach the designated position; and/or
And when the liquid level is determined to reach the specified position, sending a pump control signal to the pump controller to control the liquid conveying to stop.
As a possible embodiment, the control unit sends a valve control signal to the control valve/a pump control signal to a pump controller to control the flow rate adjustment of the liquid to be delivered, and the control unit comprises:
carrying out image analysis on the liquid level image to determine whether a sputtering area exists and the area of the sputtering area;
and when the sputtering area is determined to exist and the area of the sputtering area is larger than the preset area, sending a valve control signal to the control valve/sending a pump control signal to a pump controller, and reducing the flow of the currently conveyed liquid.
As a possible embodiment, the control unit sends a valve control signal to the control valve/a pump control signal to a pump controller to control the flow rate adjustment of the liquid to be delivered, and the control unit comprises:
and sending a valve control signal to the control valve/a pump control signal to a pump controller according to the change of the range of the identified liquid level, so as to reduce the flow rate of the currently conveyed liquid.
In a sixth aspect, embodiments of the present invention provide a computer program storage medium, wherein instructions that, when executed by a computer processor, enable the computer processor to perform the liquid perfusion control method provided by the above embodiments.
Embodiments of the present invention further provide a computer program product, which, when run on a computer device, causes the computer device to execute the method for controlling perfusion of a liquid, which is provided by the embodiments of the present invention.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (12)

1. A liquid perfusion control device, the device comprising:
the liquid level image acquisition module comprises at least one infrared camera and is used for acquiring a liquid level image in the liquid barrel through the infrared camera and sending the acquired liquid level image to the industrial personal computer so that the industrial personal computer performs liquid level identification on the liquid level image and sends a control signal to the perfusion control module according to the identified liquid level;
and the filling control module is positioned on a connecting pipeline between the liquid storage tank and the liquid barrel and used for controlling the liquid conveying on the connecting pipeline according to the control signal received from the industrial personal computer.
2. The apparatus of claim 1, wherein the perfusion control module comprises:
the control valve is used for adjusting the flow of the conveyed liquid according to a valve control signal in the liquid conveying process and stopping the liquid conveying when the liquid level reaches a specified position; and/or
The liquid level control system comprises a conveying pump and a pump controller, wherein the pump controller is used for adjusting the flow of liquid conveyed by the conveying pump according to a pump control signal in the liquid conveying process, and closing the conveying pump when the liquid level reaches a specified position according to a stop control signal.
3. The apparatus of claim 2, wherein when the perfusion control module comprises a control valve, a delivery pump and a pump controller, the delivery pump is connected to the liquid tank at one end and the control valve at the other end, and the control valve is connected to the delivery pump at one end and the injection port of the liquid barrel at the other end.
4. The apparatus of claim 1, wherein the at least one infrared camera is disposed on a sealing joint in sealing connection with the liquid barrel on a side of the sealing joint facing the liquid barrel.
5. The apparatus of claim 1 wherein the delivery pump controller regulates the flow of the delivery pump by controlling the motor speed; or the conveying pump controller adjusts the flow rate of the conveying pump in a pneumatic control mode.
6. A method of controlling liquid perfusion, comprising:
receiving a liquid level image shot by an infrared camera;
and carrying out liquid level identification on the liquid level image, and sending a control signal to a perfusion control module according to the identified liquid level so that the perfusion control module controls liquid conveying on the connecting pipeline according to the control signal received from the industrial personal computer.
7. The method of claim 6, wherein sending a control signal to the perfusion control module based on the identified liquid level comprises:
when the current conveying amount needs to be adjusted according to the identified liquid level, sending a valve control signal to the control valve to control the flow adjustment of the conveyed liquid, and sending a valve control signal to the control valve to control the stop of liquid conveying when the liquid level is determined to reach the designated position; and/or
And when the liquid level is determined to reach the specified position, sending a pump control signal to the pump controller to control the liquid conveying to stop.
8. The method of claim 7, wherein sending a valve control signal to the control valve/a pump control signal to a pump controller to control flow adjustment of the delivered liquid comprises:
carrying out image analysis on the liquid level image to determine whether a sputtering area exists and the area of the sputtering area;
and when the sputtering area is determined to exist and the area of the sputtering area is larger than the preset area, sending a valve control signal to the control valve/sending a pump control signal to a pump controller, and reducing the flow of the currently conveyed liquid.
9. The method of claim 7, wherein sending a valve control signal to the control valve/a pump control signal to a pump controller to control flow adjustment of the delivered liquid comprises:
and sending a valve control signal to the control valve/a pump control signal to a pump controller according to the change of the range of the identified liquid level, so as to reduce the flow rate of the currently conveyed liquid.
10. A liquid-filling control device, comprising:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the liquid perfusion control method of any one of claims 6-9.
11. A liquid infusion system, comprising:
the liquid storage tank is used for storing liquid and outputting the liquid through the conveying port;
the liquid barrel is used for storing liquid and filling the liquid through the injection port;
a liquid filling control device according to any one of claims 1 to 5;
the industrial personal computer is used for receiving the liquid level image sent by the infrared camera, identifying the liquid level of the liquid level image, and sending a control signal to the perfusion control module according to the identified liquid level, so that the perfusion control module controls the liquid conveying on the connecting pipeline according to the control signal received by the industrial personal computer.
12. A computer program storage medium, wherein instructions in the storage medium, when executed by a computer processor, enable the computer processor to perform a liquid perfusion control method according to any one of claims 6-9.
CN202010706480.9A 2020-07-21 2020-07-21 Liquid filling control method, device and system Pending CN112000155A (en)

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CN104079895A (en) * 2014-07-24 2014-10-01 成都市晶林科技有限公司 Storage tank liquid level detection system and method
CN204649763U (en) * 2014-10-16 2015-09-16 中国航空工业集团公司北京航空材料研究院 A kind of is the automatic liquid feeder of volumetric flask constant volume
CN104990610A (en) * 2015-07-20 2015-10-21 北京中远通科技有限公司 Crystallizing device liquid level measuring system and measuring method
KR101989292B1 (en) * 2019-02-21 2019-07-10 장현실 A Smart Cleaing dust system for road and method there of
CN110398272A (en) * 2019-07-26 2019-11-01 辽宁机电职业技术学院 It is a kind of for automatically determining the analysis meter of the measurand of fluid to be measured

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104079895A (en) * 2014-07-24 2014-10-01 成都市晶林科技有限公司 Storage tank liquid level detection system and method
CN204649763U (en) * 2014-10-16 2015-09-16 中国航空工业集团公司北京航空材料研究院 A kind of is the automatic liquid feeder of volumetric flask constant volume
CN104990610A (en) * 2015-07-20 2015-10-21 北京中远通科技有限公司 Crystallizing device liquid level measuring system and measuring method
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