Graph-free box mode programming method based on bending machine system

Abstract

The invention provides a graph-free box mode programming method based on a bending machine system. The graph-free box mode programming method comprises the following steps that S1, a substrate is initialized, and the direction is defined; s2, drawing a bending path and distributing step parameters; s3, obtaining bending data in real time and generating a two-dimensional expansion graph; s4, generating a complete two-dimensional expansion view of the box part; through the graph-free box mode programming method, the bending path can be directly generated according to the input parameters of the user, and the complexity of manually speculating and adjusting the bending sequence is avoided, so that the programming process is simplified; the state of the bending machine is monitored in real time in cooperation with the fault management module, and errors and operation difficulty caused by human factors are reduced; according to the method, through setting of the self-adaptive boundary, a reasonable complementing or trimming contour can be generated, various complex bending shape requirements are met, and manual trimming by an operator is not needed; and time waste and errors caused by misoperation or lack of experience in the traditional bending process are avoided, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of computer technology, and in particular to a programming method for a boxless mode based on a bending machine system. Background Art

[0002] As a core device for metal sheet processing, the bending machine system is widely used in modern manufacturing; however, most existing bending machine systems mainly control the bending of sheets through digital programming or graphical programming without three-dimensional functions. These systems can usually only perform the bending of single-sided sheets. For the bending of polygons or complex geometric shapes such as box shapes, they can only rely on the operator's experience and spatial imagination. The operator needs to manually adjust and speculate on the bending sequence and angle, increasing the complexity of the operation and the possibility of errors. Even modern bending machine systems equipped with three-dimensional modules usually rely on the import of three-dimensional drawings to generate bending programs. Although it solves the bending problem of complex shapes to a certain extent, there are still some limitations. Especially when dealing with shapes such as polygon boxes, interference often occurs between adjacent sides of the three-dimensional drawing, and this kind of problem needs to be solved by manual edge trimming. The operator needs to pay special attention to these interference areas and make corresponding adjustments, which not only increases the operation difficulty but also may lead to a reduction in production efficiency. Summary of the Invention

[0003] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to propose a programming method for a boxless mode based on a bending machine system.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: A programming method for a boxless mode based on a bending machine system, the bending machine system includes a drawing programming module, a configuration module, and a fault management module; The drawing programming module is used to draw a bending path and set process parameters; The configuration module is used to obtain a broken line graph and bending data in real time and generate a two-dimensional unfolding diagram; The fault management module is used to monitor the working state of the bending machine in real time and display alarm information; The programming method for a boxless mode based on a bending machine system includes the following steps: S1: Initialize the substrate and define the direction; According to the length and width parameters input by the user, create a rectangular substrate on the operation interface of the bending machine system as the bottom of the two-dimensional unfolding diagram of the box. The length and width of the rectangular substrate respectively correspond to the input length and width parameters; Define four directions of the substrate. The four directions of the substrate are 0 degrees, 90 degrees, 180 degrees, and -90 degrees respectively. The side views at 0 degrees and 180 degrees are on the same straight line corresponding to the length direction of the substrate, and the side views at 90 degrees and -90 degrees are on the same straight line corresponding to the width direction of the substrate.

[0005] S2: Draw the bending path and assign process parameters; It includes the following sub-steps: S21: Draw the bending path based on the actual bending requirements of the user; The drawing programming module draws the bending path in the drawing area of the bending machine system operation interface based on the actual bending requirements of the user. The bending path contains multiple bending edges; The bending edge refers to the broken line generated by each bending. One broken line corresponds to one bending edge, and one bending corresponds to one bending process step; Furthermore, each plane connected to the bending edge except the substrate is a bending surface, and the bending edge, bending surface, and bending process step correspond one by one; S22: Assign corresponding process parameters to the bending process steps; The process parameters include number, hidden grouping label id, etc.; The drawing programming module numbers the bending process steps according to the order of drawing of the bending process steps. The numbers are natural numbers starting from 1 and increasing; if the order of two bending process steps is exchanged, their corresponding ids are also exchanged; Furthermore, the drawing programming module assigns a hidden grouping label id to each bending process step based on the actual grouping requirements of the user. The bending process steps with the same hidden grouping label id belong to the same layer of bending; The bending process step contains bending data such as starting point, ending point, bending angle, bending length, number, id, etc.

[0006] S3: Real-time obtain bending data and generate a two-dimensional unfolded view; The configuration module real-time obtains the broken line diagram and bending data and generates a two-dimensional unfolded view, including the following sub-steps: S31: Initialize the three-dimensional coordinate system; Create a three-dimensional coordinate system with a rectangular substrate as the bottom surface. Among them, take a vertex of the rectangular substrate as the coordinate origin, the rectangular substrate is the XY plane, the X-axis direction is the length direction of the substrate, the Y-axis direction is the width direction of the substrate, and the Z-axis direction is perpendicular to the substrate and upward; The configuration module real-time obtains the broken line diagram and bending data, and determines the normal vectors of each bending surface according to the bending angles of each bending edge in the broken line diagram; Establish an independent local two-dimensional coordinate system for each bending surface. The origin of the local two-dimensional coordinate system is the starting point of the intersection line of this bending surface and the substrate. The direction of the intersection line of the bending surface and the substrate is the u-axis, and the three-dimensional vector of the u-axis is , and select a vector orthogonal to from within the bent surface, to obtain a set of three-dimensional orthogonal basis vectors; S32: Solve the intersection line vector of adjacent single-layer bent surfaces; Based on the hidden grouping label id of each bending step in the broken line diagram, determine the bent surfaces in the same bending layer, and perform the following processing on the bent surfaces in the same-layer bent surfaces: S321: Obtain the intersection line vector of two adjacent bent surfaces; For every two adjacent bent surfaces in the same bending layer, perform a cross product calculation on the normal vectors of the two bent surfaces to obtain an intersection line vector perpendicular to the two normal vectors. The direction of this intersection line vector is the intersection line direction of the two adjacent bent surfaces when the bent edges are adaptively closed; S322: Project the intersection line vector onto the local two-dimensional coordinate system to obtain a two-dimensional coordinate representation; Project the intersection line vector obtained in step S321 onto the local two-dimensional coordinate systems of the corresponding two bent surfaces to obtain the two-dimensional coordinate representations of this intersection line vector on the two bent surfaces; Specifically, assume that the two adjacent bent surfaces are respectively , , the intersection line vector is , and a pair of orthogonal basis vectors of the plane are , . Denote the two-dimensional coordinate representation of the intersection line vector on the bent surface as , ; Similarly, obtain the two-dimensional coordinate representation of the intersection line vector on the bent surface ; S323: Form the unfolded contour of the bent surface; Repeat step S323 until the two-dimensional coordinate representations of the intersection lines of all adjacent bent surfaces in the local two-dimensional coordinate system are obtained; Connect all the obtained two-dimensional coordinate representations in sequence to form the unfolded contour of the bent surface.

[0007] S4: Generate a two-dimensional unfolded drawing of the complete box-like part; Traverse all the bending layers to determine whether the bending layer is a complete layer or an incomplete layer. The complete layer is the layer where each edge of the bottom surface has a bend, and the incomplete layer is the layer where there is an edge without a bend; Furthermore, the specific method for determining whether the bending layer is a complete layer or an incomplete layer is as follows: Among the four directions of the substrate, the bending information in each direction is represented by an array, the dimension of the array is the number of bending steps in this direction, and the minimum number of bending steps among the number of bending steps in the four directions is the number of bending steps of the complete layer; the bending layer with more bending steps than the number of bending steps of the complete layer is an incomplete layer; For the complete layer, call the method for solving the intersection line vector of adjacent bending surfaces in a single layer in step S32, calculate the intersection line vectors of adjacent bending surfaces, and generate a closed unfolding contour; For the incomplete layer, complete or trim the contour without bending edges according to the actual needs through adaptive boundary setting, and then call the method for solving the intersection line vector of adjacent bending surfaces in a single layer in step S32 to generate an unfolding contour with an adaptive boundary; Specifically, for the incomplete layer, if there are bending edges in the adjacent direction, solve the intersection line of the adjacent bending edges according to the method of S32, and convert it into the parameters for contour completion or trimming; if there are no bending edges in the adjacent direction, generate the contour of this edge according to the default value or set this parameter according to the actual needs; Stitch the unfolding contours of all bending layers in hierarchical order to finally generate a complete two-dimensional unfolding drawing of the box-shaped part.

[0008] Furthermore, the fault management module pre-sets alarm rules, and monitors the working state of the bending machine in real time through sensors (such as temperature sensors, pressure sensors, position sensors, etc.). When the data collected by the sensors exceeds the threshold set in the rules, the fault management module issues an alarm on the operation interface to remind the operator to take necessary measures.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the programming method of the box-free mode, the present invention can directly generate a bending path according to the input parameters of the user, avoiding the complexity of manual speculation and adjustment of the bending sequence, thereby simplifying the programming process; cooperating with the fault management module to monitor the state of the bending machine in real time, reducing the errors and operation difficulties brought by human factors; Through the setting of the adaptive boundary, the present invention can generate reasonable contours for completion or trimming, adapt to the requirements of various complex bending shapes, and does not require the operator to manually trim the edges; the operator only needs to operate according to the programming result, avoiding the time waste and errors caused by improper operation or lack of experience in the traditional bending process, and improving the overall production efficiency.

[0010] By generating a two-dimensional unfolding drawing, the bending path and process parameters are visualized and clearly divided, avoiding the operator's speculation of the bending sequence and angle through experience and spatial imagination. This makes the bending operation for complex geometric shapes (such as box shapes) more intuitive and accurate, thereby reducing the subjective errors and complexity in the operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the step flowchart of a programming method for the mapless box mode based on a bending machine system of the present invention. Specific implementation mode

[0012] To further understand the purpose, structure, features, and functions of the present invention, the following is a detailed description in conjunction with embodiments.

[0013] As Figure 1 shown, a programming method for the mapless box mode based on a bending machine system, the bending machine system includes a drawing programming module, a configuration module, and a fault management module; The drawing programming module is used to draw the bending path and set the process parameters; The configuration module is used to obtain the broken line diagram and bending data in real time and generate a two-dimensional unfolding diagram; The fault management module is used to monitor the working state of the bending machine in real time and display alarm information; The programming method for the mapless box mode based on the bending machine system includes the following steps: S1: Initialize the substrate and define the direction; According to the length and width parameters input by the user, create a rectangular substrate on the operation interface of the bending machine system as the background of the two-dimensional unfolding diagram of the box. The length and width of the rectangular substrate respectively correspond to the input length and width parameters; Define the four directions of the substrate. The four directions of the substrate are 0 degrees, 90 degrees, 180 degrees, and -90 degrees respectively. The 0-degree and 180-degree side views are on the same straight line corresponding to the length direction of the substrate, and the 90-degree and -90-degree side views are on the same straight line corresponding to the width direction of the substrate.

[0014] S2: Draw the bending path and allocate the process parameters; It includes the following sub-steps: S21: Draw the bending path based on the actual bending requirements of the user; The drawing programming module draws the bending path in the drawing area of the operation interface of the bending machine system based on the actual bending requirements of the user. The bending path contains multiple bending edges; The bending edge refers to the broken line generated by each bending. One broken line corresponds to one bending edge, and one bending corresponds to one bending process step; Furthermore, except for the substrate, each plane connected to the bending edge is a bending surface, and the bending edge, bending surface, and bending process step correspond one by one; S22: Allocate the corresponding process parameters to the bending process steps; The process parameters include numbers, hidden group label ids, etc.; The drawing programming module numbers the bending steps according to the sequence of drawing, and the numbers are natural numbers starting from 1 and increasing; if the order of two bending steps is exchanged, their corresponding IDs are also exchanged; Further, the drawing programming module assigns a hidden grouping label ID to each bending step based on the actual grouping requirements of the user, and the bending steps with the same hidden grouping label ID belong to the same layer of bending; The bending step includes bending data such as a starting point, an ending point, a bending angle, a bending length, a number, an ID, etc.

[0015] S3: Obtain bending data in real time and generate a two-dimensional unfolded drawing; The configuration module obtains the line graph and bending data in real time and generates a two-dimensional unfolded drawing, including the following sub-steps: S31: Initialize a three-dimensional coordinate system; Create a three-dimensional coordinate system with a rectangular substrate as the bottom surface. Among them, take a vertex of the rectangular substrate as the coordinate origin, the rectangular substrate is the XY plane, the X-axis direction is the length direction of the substrate, the Y-axis direction is the width direction of the substrate, and the Z-axis direction is perpendicular to the substrate and upward; The configuration module obtains the line graph and bending data in real time, and determines the normal vectors of each bending surface according to the bending angles of each bending edge in the line graph; Establish an independent local two-dimensional coordinate system for each bending surface. The origin of the local two-dimensional coordinate system is the starting point of the intersection line of this bending surface and the substrate, and the intersection line direction of the bending surface and the substrate is the u-axis. Denote the three-dimensional vector of the u-axis as and select a vector orthogonal to from within the bending surface to obtain a set of three-dimensional orthogonal basis vectors; S32: Solve the intersection line vector of adjacent bending surfaces in a single layer; Determine the bending surfaces in the same bending layer according to the hidden grouping label IDs of each bending step in the line graph, and perform the following processing on the bending surfaces in the same layer of bending surfaces: S321: Obtain the intersection line vector of two adjacent bending surfaces; For every two adjacent bending surfaces in the same bending layer, perform a cross product calculation on the normal vectors of the two bending surfaces to obtain an intersection line vector perpendicular to the two normal vectors. The direction of this intersection line vector is the intersection line direction of the two adjacent bending surfaces when the bending edge is adaptively closed; S322: Project the intersection line vector into the local two-dimensional coordinate system to obtain a two-dimensional coordinate representation; Project the intersection line vector obtained in step S321 into the local two-dimensional coordinate systems of the corresponding two bending surfaces to obtain the two-dimensional coordinate representations of this intersection line vector on the two bending surfaces; Specifically, assume that two adjacent bending surfaces are respectively , , the intersection line vector is , and a pair of orthogonal basis vectors of the plane are , . Denote the two-dimensional coordinate representation of the intersection line vector on the bending surface as . Similarly, obtain the two-dimensional coordinate representation of the intersection line vector on the bending surface . S323: Form the unfolded contour of the bending surface; Repeat step S323 until the two-dimensional coordinate representations of the intersection lines of all adjacent bending surfaces in the local two-dimensional coordinate system are obtained; Connect all the obtained two-dimensional coordinate representations in sequence to form the unfolded contour of the bending surface.

[0016] S4: Generate the two-dimensional unfolded drawing of the complete box-like part; Traverse all the bending layers and determine whether the bending layer is a complete layer or an incomplete layer. The complete layer is the layer where each side of the bottom surface has a bend, and the incomplete layer is the layer where there is an edge without a bend; Further, the specific method for determining whether the bending layer is a complete layer or an incomplete layer is as follows: Among the four directions of the substrate, the bending information in each direction is represented by an array, the dimension of the array is the number of bending steps in this direction, and the minimum number of bending steps among the number of bending steps in the four directions is the number of bending steps of the complete layer; the bending layer with more bending steps than the number of bending steps of the complete layer is an incomplete layer; For the complete layer, call the method in step S32 to solve the intersection line vector of the adjacent bending surfaces of a single layer, calculate the intersection line vectors of each adjacent bending surface, and generate a closed unfolded contour; For the incomplete layer, according to the actual requirements, complete or trim the contour of the edge without a bend through adaptive boundary setting, and then call the method in step S32 to solve the intersection line vector of the adjacent bending surfaces of a single layer to generate an unfolded contour with an adaptive boundary; Specifically, for the incomplete layer, if there is a bending edge in the adjacent direction, solve the intersection line of the adjacent bending edges according to the method of S32 and convert it into the parameters for completing or trimming the contour; if there is no bending edge in the adjacent direction, generate the contour of this edge according to the default value or set this parameter according to the actual requirements; splice the unfolded contours of all bending layers in the hierarchical order, and finally generate the two-dimensional unfolded drawing of the complete box-like part.

[0017] Specifically, the two-dimensional unfolded drawing generation method is as follows: Select a line chart in the direction from 0 degrees to 180 degrees (the directions of 90 degrees and -90 degrees are the same). Starting from the base line segment, traverse all the broken lines on both the left and right sides of the base line segment. The broken lines on both sides are arranged in sequence starting from the base line segment to form two new linked lists. At the same time, store the broken line start point, broken line end point, bending angle, bending length, number, id and other bending data. In the unfolding diagram drawing panel, in the direction from 0 degrees to 180 degrees of the rectangular substrate, such as the 0-degree direction, loop through the 0-degree direction broken line linked list of the new combination and draw rectangles in sequence according to the bending length. During the drawing process, call the edge trimming algorithm in real time.

[0018] Furthermore, the fault management module sets alarm rules in advance, and monitors the working state of the bending machine in real time through sensors (such as temperature sensors, pressure sensors, position sensors, etc.). When the data collected by the sensors exceeds the threshold set in the rules, the fault management module issues an alarm on the operation interface to remind the operator to take necessary measures.

[0019] By monitoring sensor data and setting alarm rules, an alarm is issued in advance when the equipment is abnormal, which helps the operator take measures in time to prevent faults; it can effectively avoid sudden equipment failures and reduce downtime; reduce production stagnation caused by faults and improve production efficiency; not only helps to maintain the equipment, but also can avoid safety hazards caused by equipment failures.

[0020] Furthermore, the bending machine system also includes a library management module, and the library management module includes a mold library, a material library, and an angle correction library; The mold library is used to store different upper molds and lower molds. Each mold contains parameters such as mold type, material, size, applicable bending process, etc.; screen suitable molds from the mold library according to the bending requirements (such as angle, material type, working steps, etc.) input by the user; The material library is used to store parameter data of different materials, including information such as material type, thickness, elastic modulus, yield strength, etc.; automatically select corresponding material parameters from the material library according to the material type input by the user in the drawing programming module; The angle correction library is used to store angle deviation correction data that may occur during the actual bending process. When the user sets the bending angle, the system can automatically correct the angle data according to the content of the angle correction library to ensure the accuracy of the final result.

[0021] Automatically selecting molds and materials reduces the time for repeated attempts and manual selection. The angle correction function reduces the trial-and-error and correction steps during the bending process, overall improving production efficiency, thus saving time and production costs; effectively managing the mold library and material library can achieve efficient utilization of resources, reduce unnecessary material waste, and at the same time avoid redundant inventory, improving the resource allocation efficiency.

[0022] The present invention has been described by the above related embodiments. However, the above embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and refinements made without departing from the spirit and scope of the present invention fall within the scope of patent protection of the present invention.

Claims

1. A programming method for a mapless box mode based on a bending machine system, characterized in that: It includes the following steps: S1: Initialize the substrate and define the directions; Create a rectangular substrate as the base of the two-dimensional unfolded drawing of the box on the operation interface of the bending machine system, and define the four directions of the substrate; The bending machine system includes a drawing programming module, a configuration module, and a fault management module; S2: Draw the bending path and assign process parameters; It includes the following sub-steps: S21: Draw the bending path based on the actual bending requirements of the user; S22: Assign corresponding process parameters to the bending steps; S3: Obtain the bending data in real time and generate a two-dimensional unfolded drawing; The configuration module obtains the broken line diagram and bending data in real time and generates a two-dimensional unfolded drawing, including the following sub-steps: S31: Initialize the three-dimensional coordinate system; S32: Solve the intersection line vector of adjacent bending surfaces in a single layer; It includes the following sub-steps: S321: Obtain the intersection line vector of two adjacent bending surfaces; S322: Project the intersection line vector into the local two-dimensional coordinate system to obtain a two-dimensional coordinate representation; S323: Form the unfolded contour of the bending surface; S4: Generate a complete two-dimensional unfolded drawing of the box-like part; Traverse all bending layers, and determine whether the bending layer is a complete layer or an incomplete layer. The complete layer is the layer where each side of the bottom surface has a bend, and the incomplete layer is the layer where there is an unbended edge; Splice the unfolded contours of all bending layers in the hierarchical order to finally generate a complete two-dimensional unfolded drawing of the box-like part.

2. The programming method of the mapless box mode based on the bending machine system according to claim 1, characterized in that: The specific content of step S1 is as follows: According to the length and width parameters input by the user, create a rectangular substrate as the base of the two-dimensional unfolded drawing of the box on the operation interface of the bending machine system. The length and width of the rectangular substrate respectively correspond to the input length and width parameters; and define the four directions of the substrate; The drawing programming module is used to draw the bending path and set the process parameters; The configuration module is used to obtain the broken line diagram and bending data in real time and generate a two-dimensional unfolded drawing; The fault management module is used to monitor the working state of the bending machine in real time and display alarm information.

3. The programming method of the mapless box mode based on the bending machine system according to claim 1, characterized in that: The specific content of step S2 is as follows: S21: Draw the bending path based on the actual bending requirements of the user; The drawing programming module draws the bending path in the drawing area of the operation interface of the bending machine system based on the actual bending requirements of the user. The bending path contains multiple bending edges; The bending edge refers to the broken line generated by each bending. One broken line corresponds to one bending edge, and one bending corresponds to one bending step; except for the substrate, each plane connected to the bending edge is a bending surface, and the bending edge, bending surface, and bending step correspond one by one; S22: Assign corresponding process parameters to the bending steps; The process parameters include number and hidden grouping label id; The drawing programming module numbers the bending steps according to the order of drawing of the bending steps. The number is a natural number starting from 1 and increasing; if the order of two bending steps is exchanged, their corresponding ids are also exchanged; The drawing programming module assigns a hidden grouping label id to each bending step based on the actual grouping requirements of the user. Bending steps with the same hidden grouping label id belong to the same layer of bending. The bending step includes a starting point, an ending point, a bending angle, a bending length, a number, and an id.

4. The programming method for the mapless box mode based on a bending machine system according to claim 1, wherein: The specific content of step S31 is as follows: Create a three-dimensional coordinate system with a rectangular substrate as the bottom surface. The configuration module continuously obtains the broken line graph and bending data, and determines the normal vectors of each bending surface according to the bending angles of the bending edges in the broken line graph. Establish an independent local two-dimensional coordinate system for each bending surface. The origin of the local two-dimensional coordinate system is the starting point of the intersection line of this bending surface and the substrate, and a set of orthogonal basis vectors is selected from within the bending surface.

5. The programming method for the mapless box mode based on a bending machine system according to claim 1, wherein: The specific content of step S32 is as follows: Determine the bending surfaces in the same bending layer according to the hidden grouping label ids of the bending steps in the broken line graph, and perform the following processing on the bending surfaces in the same bending layer: S321: Obtain the intersection line vector of two adjacent bending surfaces; For every two adjacent bending surfaces in the same bending layer, perform a cross product calculation on the normal vectors of the two bending surfaces to obtain an intersection line vector perpendicular to the two normal vectors. The direction of this intersection line vector is the intersection line direction of the two adjacent bending surfaces when the bending edge is adaptively closed. S322: Project the intersection line vector into the local two-dimensional coordinate system to obtain a two-dimensional coordinate representation; Project the intersection line vector obtained in step S321 into the local two-dimensional coordinate systems of the corresponding two bending surfaces to obtain the two-dimensional coordinate representations of this intersection line vector on the two bending surfaces. S323: Form the unfolded contour of the bending surface; Repeat step S323 until the two-dimensional coordinate representations of the intersection lines of all adjacent bending surfaces in the local two-dimensional coordinate system are obtained; Connect all the obtained two-dimensional coordinate representations in sequence to form the unfolded contour of the bending surface.

6. The programming method for the mapless box mode based on a bending machine system according to claim 1, wherein: In step S4, for a complete layer, call the method for solving the intersection line vector of adjacent bending surfaces in a single layer in step S32 to calculate the intersection line vectors of each adjacent bending surface and generate a closed unfolded contour; For an incomplete layer, complete or trim the contour without a bending edge through adaptive boundary setting according to actual requirements, and then call the method for solving the intersection line vector of adjacent bending surfaces in a single layer in step S32 to generate an unfolded contour with an adaptive boundary; Stitch the unfolded contours of all bending layers in hierarchical order to finally generate a complete two-dimensional unfolded drawing of the box-like part.

7. The programming method for the mapless box mode based on a bending machine system according to claim 1, wherein: The fault management module pre-sets an alarm rule, and monitors the working state of the bending machine in real time through sensors. When the data collected by the sensors exceeds the threshold set in the rule, the fault management module issues an alarm on the operation interface to remind the operator to take necessary measures.

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