Flow security monitoring and prevention control method

Abstract

The invention discloses a flow safety monitoring and prevention control method. The method comprises the steps that the installation mode of a flow meter is defined; setting an installation mode of the flow meter in the electronic monitor, and defining a corresponding button; the installation mode of the flowmeter is detected through an image recognition algorithm, and signals are connected to the controller; when forward installation is stretched out or the forward installation is retracted, a corresponding button is selected, the electronic monitor sends a corresponding installation signal to the controller, and the controller compares the signal sent by the electronic monitor with a detected image recognition signal and carries out corresponding control. A machine tool opening and closing flow automatic detection starting button is arranged in the electronic monitor, at the moment, a handle sliding key is slid, and the controller does not respond; and at the moment, entering an automatic flow verification process. The method can realize automatic detection of the flow of batch offline machines of the whole machine, is higher in production efficiency and more accurate in data, and avoids the problem that the flow meter is damaged due to the reverse flow direction of hydraulic oil caused by manual operation of a bidirectional feather key of a handle.

Description

Technical Field

[0001] The present invention relates to the technical field of excavator control, and in particular to a flow safety monitoring and prevention control method. Background Art

[0002] Excavators are not only used in traditional earthmoving projects, but are also widely used in agriculture, forestry, municipal construction, mining, and other fields. Different scenarios require different equipment and require adjustable flow rates. Before leaving the factory, the equipment's opening and closing flow settings must be inspected. Currently, operators are required to install an electronic flow meter, set the flow rate value in the electronic monitor according to a specific step size, and then compare it with the collected flow rate value. This method is inefficient and not conducive to factory inspection of batch vehicles. Currently, some flow meters are designed for unidirectional operation. If operators mistakenly operate the bidirectional handle slide key, the oil circuit will reverse. At this time, the hydraulic oil flow direction is opposite to the flow meter installation arrow, which may damage internal components and shorten the service life.

[0003] Among the technical solutions of the prior art, the patent number is 2017105910929, and the name is a patent for a hydraulic excavator multi-tool flow limiting system and method, which includes a quick-change switch, a quick-change solenoid valve, an electromagnetic proportional pressure reducing valve, a main pump, a multi-function tool, a controller, an electronic monitor, and a switch solenoid valve group: the controller is electrically connected to the electromagnetic proportional pressure reducing valve, the quick-change solenoid valve and the switch solenoid valve group respectively, and the quick-change switch is electrically connected to the quick-change solenoid valve; the electronic monitor is connected to the controller through a CAN bus; the main pump is connected to the electromagnetic proportional pressure reducing valve through a hydraulic pipeline, and the flow through the main pump changes, thereby limiting the multi-function tool to work under appropriate flow conditions. This solution is to directly change the tool mode and the maximum flow in this mode through the electronic monitor to achieve the purpose of protecting the tool.

[0004] The patent number is 2021116519738, and the name is a patent for a control method for a multifunctional excavator tool. It includes an electronic monitor, a controller, an electric control handle and a proportional solenoid valve. The electric control handle, the proportional solenoid valve and the electronic monitor are all electrically connected to the controller: after the controller receives the input signal from the electric control handle, it sends the input signal to the electronic monitor via CAN communication. After logical judgment, the electronic monitor sends the output signal to the controller via CAN communication. The controller outputs the signal to the proportional solenoid valve: the electronic monitor can set a variety of tool control modes. When the current tool control mode is selected, the tool flow setting interface can be entered to adjust the flow. Each tool mode corresponds to a flow setting interface, and the flow setting has a memory function. By setting the control mode of various tools through the electronic monitor, the user can select the matching tool control mode according to different tools, making operation more convenient.

[0005] Both of the above methods use electronic monitors to switch the machine tools, but they still do not solve the problem that the hydraulic oil flow direction may be reversed due to the two-way sliding key of the manual operation handle. Summary of the Invention

[0006] In response to the problems existing in the above-mentioned prior art, the present invention provides a flow safety monitoring and preventive control method to solve the problem of preventing data inaccuracy and device damage caused by the opposite flow direction of the one-way flowmeter and the hydraulic oil flow, thereby ensuring the reliability of the monitoring data and the safety of the flowmeter.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a flow security monitoring and prevention control method, comprising the following steps: Step 1: Define the installation method of the flow meter. When the tool is clamped, the cylinder extends, which is defined as the extended positive installation; when the tool is released, the cylinder retracts, which is defined as the retracted positive installation; Step 2: Set the installation mode of the flow meter in the electronic monitor, and define three buttons: extend forward installation, retract forward installation, and release installation; Step 3: Use image recognition algorithm to detect the installation method of the flow meter and connect the signal to the controller; Step 4: When the device is extended and installed in the forward direction, the corresponding button is selected. The electronic monitor sends an extended and installed in the forward direction signal to the controller. The controller compares the signal sent by the electronic monitor with the detected image recognition signal and performs corresponding control. Step 5: When retracting the forward installation, select the corresponding button, and the electronic monitor sends a retract forward installation signal to the controller. The controller compares the signal sent by the electronic monitor with the detected image recognition signal and performs corresponding control; Step 6. Set the automatic detection start button for the machine opening and closing flow in the electronic monitor. At this time, slide the handle and the controller will not respond; at this time, enter the automatic flow verification process.

[0008] Furthermore, the corresponding control in step four is: if consistent, the controller responds to the electronic monitor setting information, slides the handle key, and executes the oil cylinder to extend the corresponding tool clamping sensor to be effective.

[0009] Furthermore, if there is inconsistency, the controller will set the tool clamping sensor signal corresponding to the extension of the cylinder to invalid, the controller will not respond to the corresponding input, and will send an alarm message to the electronic monitor, issuing an alarm to remind personnel that the installation method is incorrect, avoiding the problem that the hydraulic oil flow direction is opposite to the installation method, causing damage to the flow meter and inaccurate data; and at this time, the retract forward installation instruction can be executed.

[0010] Furthermore, the corresponding control in step five: if consistent, the controller responds to the electronic monitor setting information, slides the handle key, and executes the oil cylinder to extend the corresponding tool clamping sensor to be effective.

[0011] Furthermore, if there is inconsistency, the controller will set the tool clamping sensor signal corresponding to the extension of the cylinder to invalid, the controller will not respond to the corresponding input, and will send an alarm message to the electronic monitor, issuing an alarm to remind personnel that the installation method is incorrect, avoiding the problem that the hydraulic oil flow direction is opposite to the installation method, causing damage to the flow meter and inaccurate data; and at this time, the retract forward installation instruction can be executed.

[0012] Furthermore, in the automatic flow verification process in step six: the electronic monitor sends discrete flow values ​​of specific steps to the controller in sequence from small to large or from large to small, and the controller receives the discrete flow values ​​sent by the electronic monitor and checks whether they are within the flow setting threshold.

[0013] Furthermore, if the flow rate exceeds the set threshold, the controller will not respond; if the flow rate is within the set threshold, the controller will automatically output the corresponding main pump solenoid valve current.

[0014] Furthermore, the actual flow collected by the electronic flow meter is connected to the controller to determine whether it is within the deviation threshold range with the set flow. If it exceeds the deviation threshold, the electronic monitor will alert an abnormality. If it does not exceed the deviation threshold, the electronic monitor will display normal.

[0015] The beneficial effects of the present invention are: through this method, the flow rate of the whole machine batch offline tools can be automatically detected, the production efficiency is higher, the data is more accurate, and the problem of reverse flow of hydraulic oil caused by the two-way sliding key of the manual operation handle, which causes damage to the flow meter, is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the process of the present invention; Figure 2 The figure is a flow chart of the automatic flow calibration process. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention pertains. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0019] A flow safety monitoring and prevention control system, comprising: an electronic monitor setting operation interface and prompts; The invention discloses an automatic flow verification control mode for a controller and an electronic monitor; based on the system, the invention provides a flow safety monitoring and prevention control method.

[0020] like Figure 1 As shown, a traffic security monitoring and prevention control method includes the following steps: Step 1: Define the flow meter installation method. When the tool is clamped, the cylinder extends, which is defined as the extended positive installation; when the tool is released, the cylinder retracts, which is defined as the retracted positive installation. This will allow you to define the installation method on the electronic monitor.

[0021] Step 2: Set the installation mode of the flow meter in the electronic monitor, and define three buttons: extend forward installation, retract forward installation, and release installation; Step 3: Use image recognition algorithms to detect the flow meter's installation method and connect the signal to the controller. This is mainly used to collect the installation method of the electronic flow meter and compare it with the installation method set in the electronic monitor.

[0022] Step 4. Select the corresponding button when extending the forward installation. The electronic monitor sends an extended forward installation signal to the controller. The controller compares the signal sent by the electronic monitor with the detected image recognition signal. If they are consistent, the controller responds to the electronic monitor setting information, slides the handle key, and executes the corresponding tool clamping sensor of the oil cylinder extension to be valid; if they are inconsistent, the controller sets the tool clamping sensor signal corresponding to the oil cylinder extension to be invalid. The controller does not respond to the corresponding input and sends an alarm message to the electronic monitor, sounding an alarm to remind personnel that the installation method is wrong, avoiding the problem that the hydraulic oil flow direction is opposite to the installation method, causing damage to the flow meter and inaccurate data. At this time, the retracted forward installation instruction can be executed; Step 5. Select the corresponding button when retracting the forward installation. The electronic monitor sends a retract forward installation signal to the controller. The controller compares the signal sent by the electronic monitor with the detected image recognition signal. If they are consistent, the controller responds to the electronic monitor setting information and executes the corresponding tool release sensor of the oil cylinder retracting to be valid; if they are inconsistent, the controller sets the tool release sensor signal corresponding to the oil cylinder retracting to be invalid. The controller does not respond to the corresponding input and sends an alarm message to the electronic monitor, sounding an alarm to remind personnel that the installation method is wrong, avoiding the problem that the hydraulic oil flow direction is opposite to the installation method, causing damage to the flow meter and inaccurate data. At this time, the forward installation instruction can be executed; Step 6: Set the start button for automatic flow detection on the electronic monitor. If the controller does not respond when you slide the handle, the automatic flow calibration process will begin.

[0023] like Figure 2 As shown in the figure, the automatic flow verification process is as follows: the electronic monitor sends discrete flow values ​​of specific steps to the controller in sequence from small to large or from large to small. The controller receives the discrete flow values ​​sent by the electronic monitor and checks whether they are within the flow setting threshold. If the flow setting threshold is exceeded, the controller will not respond; if it is within the flow setting threshold, the controller automatically outputs the corresponding main pump solenoid valve current.

[0024] The actual flow collected by the electronic flow meter is connected to the controller to determine whether it is within the deviation threshold range with the set flow rate. If it exceeds the deviation threshold, the electronic monitor will alert an abnormality. If it does not exceed the deviation threshold, the electronic monitor will display normal.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A traffic security monitoring and prevention control method, characterized in that: The steps include: Step 1: Define the installation method of the flow meter. When the tool is clamped, the cylinder extends, which is defined as the extended positive installation; when the tool is released, the cylinder retracts, which is defined as the retracted positive installation; Step 2: Set the installation mode of the flow meter in the electronic monitor, and define three buttons: extend forward installation, retract forward installation, and release installation; Step 3: Use image recognition algorithm to detect the installation method of the flow meter and connect the signal to the controller; Step 4: When the device is extended and installed in the forward direction, the corresponding button is selected. The electronic monitor sends an extended and installed in the forward direction signal to the controller. The controller compares the signal sent by the electronic monitor with the detected image recognition signal and performs corresponding control. Step 5: When retracting the forward installation, select the corresponding button, and the electronic monitor sends a retract forward installation signal to the controller. The controller compares the signal sent by the electronic monitor with the detected image recognition signal and performs corresponding control; Step 6. Set the automatic detection start button for the machine opening and closing flow in the electronic monitor. At this time, slide the handle and the controller will not respond; at this time, enter the automatic flow verification process.

2. A flow security monitoring and prevention control method according to claim 1, characterized in that: The corresponding control in step 4: If they are consistent, the controller responds to the electronic monitor setting information, slides the handle key, and executes the oil cylinder to extend the corresponding tool clamping sensor to be valid.

3. A flow security monitoring and prevention control method according to claim 2, characterized in that: If they are inconsistent, the controller will set the tool clamping sensor signal corresponding to the extension of the cylinder to invalid, the controller will not respond to the corresponding input, and will send an alarm message to the electronic monitor, issuing an alarm to remind personnel that the installation method is incorrect, avoiding the problem that the hydraulic oil flow direction is opposite to the installation method, causing damage to the flow meter and inaccurate data; and at this time, the retract forward installation instruction can be executed.

4. A flow security monitoring and prevention control method according to claim 1, characterized in that: The corresponding control in step five: if consistent, the controller responds to the electronic monitor setting information, slides the handle key, and executes the oil cylinder to extend the corresponding tool clamping sensor to be valid.

5. A flow security monitoring and prevention control method according to claim 4, characterized in that: If they are inconsistent, the controller will set the tool clamping sensor signal corresponding to the extension of the cylinder to invalid, the controller will not respond to the corresponding input, and will send an alarm message to the electronic monitor, issuing an alarm to remind personnel that the installation method is incorrect, avoiding the problem that the hydraulic oil flow direction is opposite to the installation method, causing damage to the flow meter and inaccurate data; and at this time, the retract forward installation instruction can be executed.

6. A flow security monitoring and prevention control method according to claim 1, characterized in that: The automatic flow verification process in step six is ​​as follows: the electronic monitor sends discrete flow values ​​of specific steps to the controller in sequence from small to large or from large to small. The controller receives the discrete flow values ​​sent by the electronic monitor and checks whether they are within the flow setting threshold.

7. A flow security monitoring and prevention control method according to claim 6, characterized in that: If the flow rate exceeds the set threshold, the controller will not respond; if the flow rate is within the set threshold, the controller will automatically output the corresponding main pump solenoid valve current.

8. A flow security monitoring and prevention control method according to claim 7, characterized in that: The actual flow collected by the electronic flow meter is connected to the controller to determine whether it is within the deviation threshold range with the set flow rate. If it exceeds the deviation threshold, the electronic monitor will alert an abnormality. If it does not exceed the deviation threshold, the electronic monitor will display normal.

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