JP2719249B2 - Work Machine Weight Analysis System Using 3D Graphics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates, using the three-dimensional any graphical processing system, performs a weight analysis of the work machine, relates to a system for supporting the design.

[0002]

BACKGROUND ART working machine with a weight change, as a support system for particular design agricultural vehicles, such as combines, conventionally, CAD system or the like, any graphical processing system capable of being used.

[0003]

However, the tools used in this case only contribute to a two-dimensional study. For this reason, the Wh of each element block constituting the machine is required.
at-if analysis, i.e., when one element block is slightly moved on the display screen or when the weight is changed, the position of the center of gravity of the entire machine is changed with respect to the element block, and the degree of interference with other element blocks; Comprehensive analysis to examine changes in design was almost impossible.

[0004] System This object of the invention is to perform the weight analysis of the work machine by using the high-speed computer capable of performing a three-dimensional graph I box process, thereby capable of supporting the design of the work machine Is to provide.

[0005]

According to the present invention, there is provided a unit shape file for storing a shape of a work machine as a target model into a plurality of three-dimensional functional units, storing shape data of each unit, and a center of gravity of each unit. A mass property file for storing mass property data of the position data and the weight data, means for calculating the position of the center of gravity of the model based on the center of gravity position data of each unit, Means for plotting and displaying changes in model design quantities such as left and right lengths and front and rear lengths on two-dimensional coordinates set on the X and Y axes, and an arbitrary one of gravity center position change curves displayed on the two-dimensional coordinates. Points and
Means for designating the amount of movement, and means for determining a weight change of each unit when the center of gravity of the designated point moves by the amount of movement, and identifying and displaying a unit having a small change rate. It is characterized by the following.

Further, a means for displaying a predetermined target center of gravity position area on the two-dimensional coordinates, and means for inputting the number of steps for changing the model design variables in steps and the shift amount per step. Means for changing the model design variables according to the input number of steps and shift amount, and recalculating and displaying the model center of gravity position on the two-dimensional coordinates. .

[0007]

In the present invention, a workstation, a super minicomputer, or the like, which can perform high-speed processing as hardware and has a high-precision color display, is used.

[0008] The system of the present invention includes at least a unit shape file and a mass property file. The unit shape file divides the shape of the agricultural machine serving as the target model into a plurality of three-dimensional functional units and stores the shape data of each unit. By using this shape data, the three-dimensional shape of each unit can be displayed on the display screen. The displayed shape is not only a contour line but also a process (for example, a color process) for each surface.

[0009] The mass property file stores the center-of-gravity position data and the weight data of each unit as mass property data.

[0010] In the system of the present invention having the above file structure, in claim 1, two-dimensional coordinates in which various model design quantities such as a left-right length and a front-rear length of the model are set on the X and Y axes on a display screen. Above, the position of the center of gravity determined with reference to the mass property file is plotted. In this case, since the position of the center of gravity changes depending on the change in the amount of paddy and the presence or absence of a driver, the position of the center of gravity plotted on the two-dimensional coordinates changes.

When an arbitrary point is designated from the center of gravity displayed on the two-dimensional coordinates and an arbitrary moving amount of the position of the center of gravity is designated, the moving amount of the designated point is inputted. The weight change of each unit when moving only is determined, and the unit with the smallest change rate is identified and displayed.

Further, in the present invention, a predetermined target center of gravity position area is displayed on the two-dimensional coordinates, and various model design quantities such as a left-right length and a front-rear length are changed in a plurality of steps by a predetermined shift amount. The position of the center of gravity of the model in each case is recalculated and displayed on two-dimensional coordinates.
Therefore, on the display screen, the change of the center of gravity due to the change of various model design quantities is displayed in the predetermined target center of gravity position area.

[0013]

FIG. 1 is a block diagram of the system of the present invention. As the processor 1, a processor having an extremely high speed as compared with an ordinary personal computer CPU or the like is used. A head area such as an OS area, a program area, a file data development area, and other work areas is allocated to the main memory. The video memory 3 is connected to a high-precision color display 4. If necessary, a dedicated processor for the graph I box process is connected to this portion. I / O controller 5
Are connected to a unit shape file 6, a mass property file 7, and a display file 8, and a keyboard 9 and a mouse 10 are connected as input devices. The unit shape file stores the shape data of each unit when the target model is divided into a plurality of three-dimensional functional units. The mass property file 7 stores mass property data of the center of gravity position data and weight data of each unit. The display file 8 includes the display color and diameter of a sphere representing the position of the center of gravity of each unit, and other three-dimensional matrices.
Data related to display such as display data for ricks scale is stored.

FIG. 2 shows a unit shape file. Here, the unit NO = 1 indicates that the unit is a reaper, and the unit NO = 2 indicates that the unit is a threshing unit. FIG. 3 shows a mass property file. The weight of the mowing part of the unit NO = 1 is 115 kg, and the coordinates of the position of the center of gravity are -500, 28, X, Y and Z, respectively.
300 (the reference point is previously determined somewhere on the screen). FIG. 4 shows a display file. For example, the display of the position of the center of gravity of the reaping unit of the unit NO = 1 is displayed (here, the position is displayed by a ball).
The color is red, indicating that the diameter is 5.

FIG. 5 shows an example in which each unit of a model (here, a combine), the center of gravity of each unit, and the center of gravity of the model are displayed on a display screen in the system of the present invention. In the figure, G1 is a sphere indicating the center of gravity of a unit whose weight does not change, and G2 is a sphere indicating the center of gravity of a unit whose weight changes. GM is a sphere representing the center of gravity of the model. Here, it indicates that the GM gradually changes in accordance with the increase of the unit G2 which fluctuates.

FIG. 6 is a flowchart showing a schematic operation of the present system.

FIG. 6 is a flowchart for calculating the position of the center of gravity of the model on the display screen and displaying the position of the center of gravity and the unit shape simultaneously.

When the operation starts, the position of the center of gravity and the weight are read from the mass property file 7 for each unit, and the position of the center of gravity of the model is calculated at n1. The following formula is a calculation formula for calculating the position of the center of gravity of the model.

[0019]

(Equation 1)

Next, from the display file 8, display data such as the color and the radius of the barycentric sphere of each unit is read out,
At n2, the shape of each unit and the position of the center of gravity of the model are displayed on the display screen. In the example shown in FIG. 5, the display of each unit and one of the center of gravity GM are displayed.

FIG. 7 is a flowchart generally performed together with the operation of FIG. In this flow, after referring to the position and weight of the center of gravity of each unit from the mass property file 7, the ball of the center of gravity of each unit is displayed at n3, and the processing ends. Therefore, when FIG. 7 is completed,
As shown in FIG. 5, a sphere at the position of the center of gravity of each unit indicated by G1 or G2 is displayed.

FIG. 8 is a flow chart for displaying a graph of two-dimensional coordinates on a display screen.

First, the position of the center of gravity and the weight of each unit are read from the mass property file 7, and the crawler position, the contact length, and the pitch between the tracks set on the X and Y axes of the two-dimensional coordinate graph are read from the display file 8. The shift amount of the distance from the reference position is read, and the center of gravity position of the model is calculated at n4. Subsequently, a graph window is set at n5, and a two-dimensional graph is displayed on the display screen. Further, the value of the position of the center of gravity is converted into a graph coordinate position in n6, and a graph is displayed in n7. FIG. 9 shows an example when a graph is displayed. In the figure, the distance between ruts (left-right balance) is shown in the X-axis direction, and the front-rear balance in the crawler direction is shown in the Y-axis direction. The distance from the reference position is displayed as a percentage of the total length.
As shown in the figure, depending on the change in the amount of paddy and the presence or absence of a driver,
As shown in FIG. 5, since the number of units whose weight varies fluctuates, the position of the model center of gravity changes in accordance with the increase / decrease of those units. In the figure, for example, point A1 indicates the position of the center of gravity when the driver gets on the driver's seat.

FIG. 10 shows an operation corresponding to claim 1 in the above display state.

First, the position of the center of gravity and the weight of each unit are read from the mass property file 7, and a point (expressed by a code or a number) of the center of gravity of the model to be moved on the coordinates is designated from the input device. Wait for. Further, it waits for the movement amount to be input.

When the number of the position of the center of gravity to be moved and the amount of movement are input, subsequently, the designation of a unit whose weight is not to be changed is waited, and the weight change rate for all units other than that unit is obtained (n12). That is, in order to move the designated center of gravity by the designated moving amount, when the weight of each unit is individually changed,
Each unit asks how much weight should be changed. Then, the weight change rate for each unit is displayed (n13), and the one with the smallest weight change rate among them is identified and displayed for easy understanding by the operator by changing the display color. In the present embodiment, the display color of the barycenter sphere of the unit having the lowest rank 1, that is, the unit having the smallest weight change rate, is changed (n14). Therefore, when the model and the center of gravity of each unit are displayed by the operations shown in FIGS. 6 and 7 after this operation, the display color of the center of gravity of the unit having the first rank becomes a specific display color.

FIG. 11 shows an operation corresponding to claim 2. When the operation shown in FIG. 8 is executed and the display state is shown in FIG. 9, the operation shown in FIG. 11 is executed. First, n
At 15, a target center of gravity position area Q is displayed. The area indicated by hatching in FIG. 9 is the target center-of-gravity position area Q. The target center-of-gravity position area indicates an allowable range in which the model center-of-gravity position changes with an expected weight change. While the target center-of-gravity position area is displayed, wait for the number of steps to be changed little by little in the model design parameters such as the left-right length, the front-rear length, and the shift amount per step (n1).
6), change one step at n17 and proceed to the operation at n4 and below in FIG. That is, since the position of the unit changes and the position of the center of gravity of the model changes by changing the position by one step, the center of gravity of the model is recalculated in n4, and n5 to n5 are calculated.
A graph is displayed at n7. The above-mentioned n18 is repeated until all the step changes are performed, and if the result does not enter the target area or the result does not enter the target area is listed. The designer (operator) can visually check the result because a graph is displayed at n7 every time the step changes.

[0028]

According to the present invention, a mass property file for storing mass property data of each unit is provided, and the position of the center of gravity of the model is obtained from the mass property file and plotted and displayed on two-dimensional coordinates. Since the weight change rate of each unit when an arbitrary point on the position change curve is moved by an arbitrary amount is calculated, the designer needs to change the weight of the model when he wants to slightly move the center of gravity of the model. Can determine the unit that requires the least amount. Further, for example, in an agricultural machine equipped with crawlers, when the length (left-right length) between crawlers is changed little by little, it is possible to know the change in the center of gravity of the model on the two-dimensional coordinates. Therefore, a very useful simulation can be performed when performing a weight balance plan.

[Brief description of the drawings]

FIG. 1 shows a configuration diagram of a system of the present invention.

FIG. 2 shows a unit shape file.

FIG. 3 shows a mass property file.

FIG. 4 shows a display file.

FIG. 5 is a diagram showing a display example of each unit and a barycenter sphere;

FIG. 6

FIGS. 8, 10, and 11 are flowcharts showing the present operation.

FIG. 9 is a diagram showing a graph in which changes in the position of the center of gravity of a model are plotted on two-dimensional coordinates.

[Explanation of symbols]

 6- Unit shape file 7- Mass property file 8- Display file

Claims (2)

(57) [Claims] 1. A unit shape file for dividing a shape of a work machine serving as a target model into a plurality of three-dimensional function units and storing shape data of each unit; and mass properties of center-of-gravity position data and weight data of each unit. A mass property file for storing data; a means for obtaining the position of the center of gravity of the model based on the data of the center of gravity of each unit; a change in the center of gravity due to a weight change such as a change in paddy amount; Means for plotting and displaying various model design quantities on the two-dimensional coordinates set on the X and Y axes, an arbitrary point in the center-of-gravity position change curve displayed on the two-dimensional coordinates, and a movement amount thereof. Means for designating, and a weight change of each unit when the center of gravity of the designated point moves by the movement amount is determined, and a unit having a small change rate is identified. A weight analysis system for a working machine using three-dimensional graphics, comprising: 2. A unit shape file for dividing a shape of a work machine serving as a target model into a plurality of three-dimensional functional units and storing shape data of each unit, and mass properties of center-of-gravity position data and weight data of each unit. A mass property file for storing data; a means for obtaining the position of the center of gravity of the model based on the data of the center of gravity of each unit; a change in the center of gravity due to a weight change such as a change in paddy amount; Means for plotting and displaying various model design quantities on two-dimensional coordinates set on the X and Y axes, means for displaying a predetermined target center of gravity position area on the two-dimensional coordinates, Means for inputting the number of steps whose amount is to be changed stepwise and the shift amount per step; and setting the model according to the input number of steps and shift amount. The two-dimensional consisting comprises means for recalculating and displaying a model position of the center of gravity to the coordinates, the three-dimensional working machine weight analysis system using graphics as well as changing the quantities.