KR101118613B1 - Analysis apparatus and analysis method - Google Patents

Abstract

The recording medium type setting unit selects a recording medium type to be analyzed based on the information input to the input unit. The threshold value setting section sets a threshold value, which is a criterion for determining whether to output a calculation result for each recording medium type selected by the recording medium type setting section. The change amount calculating unit calculates the reaction force for each time step, and during this calculation, stores the reaction force at the current time step of the time integration in the RAM, and monitors the change amount of the reaction force between the next time step and each time step. . The file output control unit calculates the difference between the reaction force saved by the change amount calculating unit and the reaction force in the current time step, and when the difference is larger than the threshold value, file output is performed.

Analysis device, recording medium, threshold value, time step, reaction force

Description

Analysis device and analysis method {ANALYSIS APPARATUS AND ANALYSIS METHOD}

The present invention relates to an analysis device and an analysis method, and more particularly, to the design of a conveyance path of a sheet-shaped recording medium.

In the design of an object, reviewing the function of the object under various conditions before manufacturing the object or a prototype of the object can reduce the number of processes required for the manufacture and testing of the prototype of the object and develop it. It is preferable in that the period and cost can be reduced. This also applies to the design of a conveyance path of a sheet-like recording medium, such as a sheet of paper or film, in an image forming apparatus such as a copying machine or a laser-beam printer (LBP).

Therefore, the behavior at the time of conveyance of the sheet-shaped recording medium is analyzed by simulation. For example, techniques for simulating the behavior of the recording medium are described in Katsuhito Sudoh, 2000, "Modeling a String from Observing the Real Object", Proc. of Int. Conf. on Virtual Systems and Multimedia (VSMM 2000), pp. 544-553, which discloses a record carrier simply by mass and spring. We devise the equations of motion of the record carrier discretely expressed by mass-spring system, divide the analysis time into time steps with finite width, and calculate the unknown acceleration, velocity, and displacement sequentially from time 0 to time step. The solution to the motion of the recording medium is obtained by numerical time integration. For this simulation, Newmark's β method, Wilson's θ method, Euler's method, Kutta-Merson's method, etc. are widely used.

In the simulation at the time of conveyance of the recording medium, calculation results are output in order to quantitatively evaluate a phenomenon such as a collision of the recording medium. A phenomenon that occurs in a very short time, such as a collision of a recording medium, results in a waveform with an instantaneous peak. In order to evaluate this waveform, information at short time steps is required.

When all the data is output for each time step with respect to the calculation result of the calculated recording medium in this way, the size of the resulting file is enormous. For this reason, the load on reading the resultant file is generated, and further, the process for displaying the waveform on the screen takes time. In order to solve the said problem, generally, a file is output for every some time step, and the file size is made small.

In order to solve the problem of an increase in load when displaying the results of a large-scale file output on the screen, for example, a method of displaying only the characteristic parts in detail and roughly displaying the remaining parts is disclosed in Japanese Patent Laid-Open No. 9-9. 91316.

However, if a file is output at a certain time step, the information calculated between a file output and the next file output will not be outputted despite the fact that it is desirable to record this information. there is a problem.

In addition, depending on the rigidity of the recording medium, the amount of information on the portion necessary for evaluation changes. For example, it is assumed that a recording medium having a high rigidity and a recording medium having a low rigidity are provided. In this case, as the stiffness is increased, the reaction force at the time of the collision of the recording medium has a sharp waveform with a high peak and a narrow width of the peak. Therefore, it is necessary to output the file in a short time step to grasp the characteristics of the waveform. On the contrary, as the stiffness is reduced, the reaction force has a waveform with a low peak and a wide peak, so that the file is output in a time step longer than the recording medium with high stiffness. Under these conditions, if file output is performed on different types of recording media under the same conditions, file output can be appropriately performed on some types of recording media, but file output cannot be performed in detail on some types of recording media. In addition, on some types of recording media, waveforms that are more detailed than necessary are undesirably output.

An embodiment of the present invention provides an analysis apparatus and an analysis method that enable detailed analysis of a conveyance path while suppressing the enlarging of a file size when performing file output.

An analysis apparatus according to an exemplary embodiment of the present invention includes a threshold setting unit configured to set a type and a threshold of a recording medium to be analyzed, and the recording medium when the recording medium is conveyed in a designed transport path. A calculation unit configured to calculate a physical quantity with respect to the storage unit, and store the calculated physical quantity in a storage unit; and when the change amount of the physical quantity calculated by the calculation unit is equal to or less than the threshold value, the change amount exceeds the threshold value. And an output configured to output the physical quantity in a short cycle.

According to another exemplary embodiment of the present invention, an analysis method includes setting a type and a threshold value of a recording medium to be analyzed, and a physical quantity relating to the recording medium when the recording medium is being conveyed within a designed transport path. And storing the calculated physical quantity in a storage unit, and outputting the physical quantity in a shorter cycle than when the variation amount exceeds the threshold value, when the calculated variation amount is less than or equal to the threshold value.

Other features of the present invention will become apparent from the following description of exemplary embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a design support apparatus (analysis apparatus) according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the design support apparatus includes a CPU (central processing unit) 11, a display unit 12, a storage unit 13, a read only memory (ROM) 14, and a random access memory (RAM) 15. , And an input unit 16 is provided. The ROM 14 stores a control program, various application programs, and data. The CPU 11 controls the whole design support device using the above programs and data. The various application programs described above include a design support program. The RAM 15 is used as a work area, for example, when the CPU 11 performs processing while controlling each unit by using the above-described control program and application program. As the storage unit 13, for example, a hard disk is used, and the storage unit 13 stores the result of the analysis by the CPU 11 when the CPU 11 performs a process. As the input unit 16, for example, a keyboard and a mouse are used, and the input unit receives an input from a user. The display unit 12 displays information input by the user at the input unit 16, the results of the analysis, and the like in response to a command from the CPU 11 based on the control program or various application programs described above.

Next, the outline | summary of the content of a design support program is demonstrated. 2 is a functional block diagram showing a block structure implemented by the CPU 11 executing a design support program.

This block structure includes a recording medium type (type of recording medium) setting unit 21, a threshold setting unit 22, a change amount calculating unit 23, and a file output control unit 24.

The recording medium type setting unit 21 selects the recording medium type to be analyzed based on the information input to the input unit 16. The threshold value setting section 22 sets a threshold value as a reference for determining whether to output a calculation result for each recording medium type selected by the recording medium type setting section 21. As described later, the threshold value may be set based on the default setting or based on information input to the input unit 16. The change amount calculation unit 23 calculates the reaction force for each time step, and during this calculation, stores the reaction force at the current time step of the time integration in the storage unit 13 or the RAM 15, and stores each time step and the next. Monitor the amount of change in reaction force between time steps. The file output control unit 24 calculates the difference (the amount of change in reaction force between successive time steps) between the reaction force saved by the change amount calculation unit 23 and the reaction force in the current time step, and the difference is the threshold value setting unit. When larger than the threshold value set by (22), file output is performed.

Although not shown in FIG. 2, a display control unit for displaying a screen having a predetermined configuration on the display unit 12 and reflecting the instruction content input to the input unit 16 on the screen is also included in the block configuration.

Here, an example of the screen (user interface: UI) displayed on the display part 12 is demonstrated. 3-5 is a figure which shows an example of the screen displayed based on a design support program. As shown in FIG. 3, the screen displayed based on the design support program includes a menu bar 1 mainly used for switching between items to be set and a sub configuration menu set for each item selected by the menu bar 1 ( 2) is included. The screen also includes a graphical screen 3 and a command field 4. Information input into the sub configuration menu 2, for example, the defined conveying path and the result of the conveying path, is displayed on the graphic screen 3. The program message is output in the command column 4, and numerical values are input in the command column 4 as necessary. The menu bar 1 includes, for example, buttons of "file", "return path", "media definition", "return condition" and "display result".

When the button of "carrying path" is selected from the menu bar 1, as shown in Fig. 3, the menu for defining the conveying path is displayed as the sub configuration menu 2 on the left side of the screen, for example. In the sub configuration menu 2 for defining the conveying path, for example, roller pair defining button 2A used to define a pair of rollers functioning as one conveying roller and defining one roller alone The roller defining button 2B used for the purpose and the linear guide defining button 2C used for defining the linear conveyance guide are included. The sub configuration menu 2 for defining the conveying path also includes a circular guide defining button 2D used to define the conveying guide of the arc, the spline guide used to define the conveying guide of the spline curve. A definition button 2E and a flapper definition button 2F used to define a flapper (point) for branching the conveyance path of the recording medium are also included. The sub configuration menu 2 for defining the conveying path further includes a sensor defining button 2G used to define a sensor for detecting whether or not the recording medium is at a predetermined position in the conveying path. Each button of the roller pair defining button 2A to the sensor defining button 2G corresponds to a part constituting a conveyance path of an image forming apparatus such as a copying machine or a printer. It is preferable that all of the parts necessary for setting the conveyance path of the recording medium such as paper are provided. When these buttons are operated, it becomes possible to display the corresponding parts in the graphic screen 3.

When the " medium definition " button is selected from the menu bar 1, as shown in Fig. 4, a menu for medium definition is displayed as the sub configuration menu 2 on the left side of the screen, for example. The sub configuration menu 2 for defining the medium includes, for example, a drawing shape selection column 2I, a medium type selection column 2J, a division method selection column 2K, and a curl setting button 2L.

In the drawing shape selection column 2I, for example, "straight line", "arc arc" and "spline" are displayed so as to be selectable. When " straight line " is selected, the command column 4 displays a message for prompting input of coordinate values at both ends (start and end points) of the recording medium. A user (designer) may input a numerical value into the command column 4 as a coordinate value, or may instruct coordinate values directly on the graphic screen 3 using a pointing device such as a mouse. As with the conveyance guide, it is also possible to select "arc" or "spline".

When the coordinate values of both ends of the recording medium are defined, a line segment (dashed line) 122 connecting the two ends 121 to the graphic screen 3 is drawn. By observing this line segment 122, the user can confirm how the recording medium is installed in the conveying path.

In the medium type selection field 2J, one or more types of recording mediums are selectively displayed. Such a type of recording medium can be registered in a database prior to design. For example, it is preferable to register the kind of recording medium which is used universally. In the registration of the type of recording medium in the database, parameters used for calculating the behavior of the recording medium such as Young's modulus, density and thickness are also registered for each type of recording medium. By registering these parameters, when an item is selected from the medium type selection box 2J, it is possible to easily read out and use the parameters for the recording medium. Here, as a type of a recording medium "recycled paper A" is selected for that assumption, and also, "A recycled paper", in advance, "Young's modulus: 5409 Mpa, ^{density: 6.8 × 10 -7 kg / mm} 3, thickness: 0.0951 Assume that a parameter named "mm" is registered in the database. Since the stiffness rate of the recording medium can be calculated from the Young's modulus or the like, the database can correlate the type of recording medium with the stiffness of the recording medium.

In the division method selection field 2K, for example, " equal division ", " equal division " and " automatic " are selectively displayed. When a shape is selected from the drawing shape selection box 2I and the coordinate values at both ends of the recording medium are input, a message is displayed in the command field 4 in accordance with the selection result of "equal splitting", "equal splitting" or "automatic". do. For example, when " equal dividing " is selected, a message for prompting input of the division number or division size when discretizing the recording medium into a plurality of spring-mass meters is displayed in the command field 4. As in the example of FIG. 4, when the division number (for example, the value "10") is input when "straight line" is selected, as shown in FIG. 5, the design contents of the conveyance path reflecting this input value are shown. This is displayed on the graphic screen 3. Referring to Fig. 5, the rotating spring 52 connecting the material points 51 shows the bending rigidity when the recording medium is regarded as an elastic body, and the translational spring 53 shows the tensile rigidity. Both spring constants can be derived from the elastic theory.

The curl setting button 2L can be used to form a curl shape having curvature as the initial shape of the recording medium. For example, in order to form a shape in which the recording medium is curled throughout, the curl can be defined by specifying a radius of curvature. The radius of curvature is specified by inputting a numerical value into the command field 4, for example.

The "conveyance condition" button in the menu bar 1 is used to set the rotational speed of the conveying roller of each recording medium. When the user presses the "conveyance condition" button, the numerical values of the rotational speeds of the respective rollers are sequentially designated in the command column 4.

In this way, the conveyance path of the image forming apparatus is designed. In this exemplary embodiment, if a predetermined parameter is registered for each type of recording medium, and this parameter becomes available according to the selection of the type of recording medium, the configuration for designing the conveying path may be any.

In the analysis of the conveying path of the recording medium, it is important to analyze in detail the behavior of the recording medium which occurs instantaneously when the recording medium is being conveyed. For example, it is important to analyze the behavior of the recording medium when the rear end of the recording medium is opened while the rear end of the recording medium is held in contact with the conveying path. In particular, as shown in FIG. 6, when the recording medium 42 is bent in the conveyance path in the direction 45 and the rear end of the recording medium 42 passes through the guide 43, the restoring force of the recording medium 42 From the normal speed so far, the speed of the recording medium 42 rises instantaneously. Then, the trajectory 41 is followed so that the rear end of the recording medium 42 contacts the guide 44. The analysis of the behavior at this time is important because a strong impact is momentarily applied to the recording medium 42, which may adversely affect the image in an image forming apparatus such as a copying machine.

Therefore, in order to analyze the phenomenon before and after contact with the guide 44 in detail, you may output waveforms, such as a change of a speed and a contact reaction with a guide, using the time integration of a physical quantity.

However, if the recording frequency of the calculation result in the time integration to the file is increased, that is, if the file is output frequently, the file becomes too large. On the other hand, if the recording frequency is reduced, detailed analysis becomes difficult.

7 is a graph showing the relationship between the frequency of file output and a waveform obtained as a result. For example, in the analysis of the contact reaction force, as shown by the graph 62 of FIG. 7, when the time step Δt of the time integration is set to "2.0 x 10 ^-7 [s]" and a file is output every 10 cycles, The fluctuations in the contact reaction force during peaking can be grasped in detail. However, since the size of the file is considerable, the load at the time of reading the subsequent file and outputting the subsequent waveform becomes large. On the other hand, if a file is output every 100 cycles, as shown by the graph 61 of FIG. 7, the load is reduced, but it becomes difficult to grasp the contact reaction force in detail. Therefore, it is difficult to solve the problem only by performing file output at equal intervals, that is, to balance the trade-off between detailed analysis and light load reduction.

In the analysis of the conveying path of the recording medium, the main factor determining the behavior of the recording medium is the rigidity of the recording medium. For example, as shown in Fig. 8, when one end of the high rigidity recording medium 71 and one end of the low rigidity recording medium 72 are fixed, and the test of bending the recording mediums 71 and 72 by their weight is carried out, There is a big difference between the amount of change in the position of the free end of the recording medium 71 and the amount of change in the position of the free end of the recording medium 72. Therefore, in the analysis of the conveyance path of the recording medium, it is important to quantitatively evaluate the difference in behavior caused by the difference in stiffness. The stiffness expressed by quantifying the stiffness is a physical quantity derived from Poisson's ratio and Young's modulus of the recording medium, and varies depending on the type of recording medium. Since the Poisson's ratio is a numerical value relating to the shape of the recording medium, the Poisson's ratio can be derived from the thickness of the recording medium. For this reason, in the present exemplary embodiment, as described above, the Young's modulus and the thickness are included in the parameter for each type of recording medium.

Next, a description will be given of a method for analyzing a conveyance path of the image forming apparatus using the design support apparatus configured as described above.

It is assumed that the user (designer) has designed the conveying path using the screens shown in Figs. 3 to 5, and in this design, the configuration of the conveying path, the type of recording medium used, and the parameters of the recording medium are set. It is. In this state, when the button of "Display result" is pressed, the designed conveyance path is analyzed and the analysis result is displayed. 9 is a flowchart showing an example of an analysis method of a conveyance path according to an embodiment of the present invention.

Referring to FIG. 9, in step S1, the CPU 11 reads the Young's modulus, density and thickness of the recording medium from the database according to the type of the recording medium included in the design data for the conveyance path, and reads the value. The stiffness factor of the recording medium is obtained from

In step S2, the CPU 11 sets a threshold value, which is a criterion for determining whether to output a calculation result in accordance with the obtained rigidity factor. Since the stiffness rate is unique for each type of recording medium, this threshold can also be regarded as unique for each type of recording medium.

In step S3, the CPU 11 starts the calculation of the motion and calculates the real-time (calculation end time) T for calculating the motion of the recording medium and the time step Δt of the numerical time integration used to numerically solve the motion equation. Seconds). Subsequent steps S4 to S10 form a loop in which the movement of the recording medium is calculated for each time step Δt from the initial time and the result of the calculation is stored in the RAM 15.

In step S4, the CPU 11 sets the initial acceleration, the initial speed, and the initial displacement required for the calculation after Δt seconds. Each time one cycle is completed, the calculation result (that is, the calculation value of the previous cycle is used as the initial value) is updated.

In step S5, the CPU 11 defines the force applied to each quality point constituting the recording medium. Here, the forces used for the calculation include rotation moments, restoring forces represented by tensile forces, contact forces, frictional forces, gravity, air resistance, and coulomb forces. Then, the CPU 11 calculates the force applied to the individual points, and then defines the combined force (total force) as the force finally applied to the recording medium.

In step S6, the CPU 11 divides the total force applied to each quality point calculated in step S5 by the mass of the quality point, and adds the initial acceleration to the result of the division, thereby calculating the acceleration of the quality point after Δt seconds. Calculate.

In step S7, the CPU 11 multiplies the acceleration calculated in step S6 by Δt and adds the initial speed to the result of the multiplication, and calculates the speed of the corresponding quality point after Δt seconds.

In step S8, the CPU 11 multiplies the speed calculated in step S7 by Δt and adds the initial displacement to the result of the multiplication, and calculates the displacement of the quality point after Δt seconds.

The CPU 11 repeats the calculations of steps S5 to S8 to calculate displacements of all the quality points after Δt seconds. In the present exemplary embodiment, Euler's time integration method is employed to calculate the physical quantities after a series of Δt seconds in steps S5 to S8, but other time integration methods such as Kutta-Merson method, β method of Newmark, and θ method of Willson are employed. You may employ | adopt.

In step S9, the CPU 11 outputs the calculation result. Here, step S9 will be described in detail. FIG. 10 is a flowchart showing the process of step S9 of FIG.

Referring to FIG. 10, in step S11, the CPU 11 stores the displacement of each quality point in the RAM 15.

In step S12, the CPU 11 reads the displacement of each quality point stored in the RAM 15 in the immediately preceding cycle (cycle before? T seconds), and calculates the difference between the current displacement and the read displacement.

In step S13, the CPU 11 determines whether the difference calculated in step S12 is larger than the threshold value set in step S2.

When the CPU 11 determines that the difference is larger than the threshold value (YES in step S13), in step S14, the CPU 11 files the current displacement. That is, the current displacement is included in the file.

If the CPU 11 determines that the difference is equal to or less than the threshold value (NO in step S13), then in step S15, the CPU 11 determines whether the current cycle corresponds to a default output cycle. That is, when outputting files every 1000 cycles is set by default regardless of the difference between the thresholds, the CPU 11 determines whether the current cycle corresponds to the 1000th cycle. This default output cycle may not be fixed, or may be a variable cycle in which file output is performed at equal intervals.

When the CPU 11 determines that the current cycle corresponds to the default output cycle (YES in step S15), the CPU 11 files the current displacement in step S16.

If the CPU 11 determines that the current cycle does not correspond to the default output cycle (NO in step S15), the process in Fig. 10 ends without performing file output.

In this way, step S9 is performed. The file output may include speed and / or acceleration at each point. In this case, in steps S11, S12, S13 and S15, the speed and / or the acceleration are also stored, calculated and judged.

After step S9, in step S10, the CPU 11 determines whether the real time T set in step S3 has been reached, as shown in FIG. 9.

If the CPU 11 determines that the real-time T has been reached (YES in step S10), the analysis of the conveyance path ends. On the other hand, when the CPU 11 determines that the real time T has not been reached (NO in step S10), steps S4 to S9 are repeated.

As a result of this analysis, the waveform shown in FIG. 11 is obtained, for example. That is, referring to FIG. 11, in a time zone where the change of physical quantities such as initial displacement every Δt seconds is small, that is, when a detailed analysis is not necessary, by default, every 1000 cycles (2 × 10 ⁻⁴ [s) The graph segment 101 based on the file output of each []] is drawn (step S16). Thereafter, as indicated by arrow 102, the change every? T second of the physical quantity increases, and if the change amount exceeds the threshold, the frequency of file output increases. That is, in the time zone where the change in the physical quantity is large every Δt seconds, that is, during the time when detailed analysis is required, the graph segment 103 based on the file output every cycle (every 2 × 10 ⁻⁷ [s]) is drawn. (Step S14).

The threshold value as a criterion for determining whether or not file output is executed should increase with increasing rigidity of the recording medium. This is because, if the threshold value is set large for a recording medium with a small stiffness rate, it is difficult to detect peaks. If the threshold value is set small for a recording medium with a high stiffness rate, the output of unnecessary portions other than the peak also increases. This is because the size of is too large.

On the other hand, if the threshold value is set small for a recording medium with a small stiffness rate and the threshold value is set large for a recording medium with a high stiffness rate, as shown in FIG. 12, an appropriate waveform can be obtained without excessively increasing the file size. Can be generated. Referring to FIG. 12, the graph 111 is for a recording medium having a high stiffness rate and has a high threshold value. Graph 112 is for a recording medium having a low stiffness rate and has a low threshold value. In FIG. 12, an initial output cycle is a cycle of file output (step S16) based on a default setting. In the graph 111, the difference exceeds the threshold value at time B (step S13), and detailed file output for each cycle (step S14) is performed after time B. FIG. In the graph 112, the difference in time A exceeds the threshold value (step S13), and the detailed file output for each cycle is performed after time A (step S14). In this way, by adjusting the threshold value according to the stiffness ratio, it is possible to appropriately grasp the characteristics of the waveform of the reaction force due to the collision of the recording medium and to suppress the excessive increase in the file size.

In the above exemplary embodiment, the CPU 11 sets the threshold value in accordance with the stiffness factor in step S2, but the user may set the threshold value. For example, as shown in FIG. 13, a "user setting definition" button 91 may be further provided on the screen shown in FIG. 3, and when this button 91 is pressed, an arbitrary value is input to the user. The user interface including field 92 may be displayed. After the arbitrary value is input, if the "OK" button is pressed, the process after step S3 may be performed.

According to the present exemplary embodiment, the threshold value is set according to the type of the recording medium, and the frequency of file output is adjusted according to the comparison result of the threshold value and the change amount of the physical quantity. The calculation result can be provided. Therefore, in file output, an excessive increase in the file size can be suppressed.

In the above exemplary embodiment, the time step Δt in time integration is fixed and the cycle of file output is determined from the difference between the change in the physical quantity and the threshold, but the difference between the change in the physical quantity and the threshold You may change time step (DELTA) t based on. For example, the file output may be performed for every cycle, or the time step DELTA t may be made smaller after the cycle in which the change in the physical quantity exceeds the threshold.

Even with this analysis method, an appropriate waveform can be obtained while suppressing an excessive increase in the file size. It is also possible to reduce the number of calculations.

14 is a graph showing an example of waveforms obtained by the above analysis method. In the example of Figure 14, the difference is one cycle before crossing the threshold value is set to 4 × 10 ^-4 [s], the difference is then exceeded the threshold value, the first cycle half the value, that is, 2 × 10 ^{- 4 It} is set to [s]. According to this method, time step DELTA t is reduced only in the time zone where detailed analysis is required, and calculation is performed at twice the speed in the remaining time zones.

An exemplary embodiment of the present invention can be realized by a computer executing a program. In addition, a unit for supplying a program to a computer, for example, a computer-readable storage medium (recording medium) such as a compact disk-read only memory (CD-ROM) in which the program is recorded or a transmission medium such as the Internet for transferring the program. It is also applicable to an exemplary embodiment of the present invention. The above program can also be applied to exemplary embodiments of the present invention. The above programs, recording media, transmission media and program products are included in the scope of the present invention.

Although the present invention has been described with reference to exemplary embodiments, it is not limited to this exemplary embodiment of the present invention. The following claims are to be accorded the broadest interpretation so as to encompass all modifications, equivalent structures and functions.

1 is a block diagram illustrating an example of a configuration of a design support apparatus according to an exemplary embodiment of the present invention.

2 is a functional block diagram illustrating an example of a block configuration implemented by the CPU executing a design support program.

3 is a diagram illustrating an example of a screen displayed based on a design support program.

4 is a diagram illustrating another example of a screen displayed based on a design support program.

5 is a diagram illustrating still another example of a screen displayed based on a design support program.

6 is a diagram showing the behavior of the recording medium in the conveyance path.

Fig. 7 is a graph showing the relationship between the frequency of file output and the resulting waveform.

8 is a view showing the shape change of two kinds of recording media having different stiffness.

9 is a flowchart showing an example of a method for analyzing a conveyance path according to an exemplary embodiment of the present invention.

10 is a flowchart showing in detail a process of outputting the result of FIG.

11 is a graph showing an example of waveforms obtained as a result of analysis.

12 is a graph showing a relationship between stiffness and a threshold value.

13 is a diagram illustrating an example of a screen displayed according to a modification of an exemplary embodiment of the present invention.

14 is a graph showing an example of waveforms according to another modified example of the exemplary embodiment of the present invention.

Claims (8)

A threshold setting unit configured to set a type and a threshold of a sheet-like recording object to be analyzed; A calculation configured to calculate a reaction force with respect to the sheet-like recording object at the time of collision with the roller on the conveyance path when the sheet-like recording object is being conveyed in the designed conveying path, and to store the calculated reaction force in the storage unit Wealth, And an output unit configured to output the reaction force in a shorter cycle than when the change amount exceeds the threshold value when the change amount of the reaction force calculated by the calculation unit is equal to or less than the threshold value. . The method of claim 1, And the output unit outputs the reaction force whenever the calculation unit calculates the reaction force when the amount of change in reaction force exceeds the threshold. delete The method of claim 1, And the calculating unit further calculates an acceleration and a speed of the sheet-like recording object. The method of claim 1, And the threshold value setting section reads the threshold value from a database that associates each type and rigidity of the sheet-shaped recording object, and sets the read threshold value. The method of claim 1, And the threshold setting unit is connected to a user interface, and sets a value input through the user interface as the threshold value. The threshold setting unit setting a type and a threshold value of the sheet-like recording object to be analyzed; The calculation unit calculates the reaction force with respect to the sheet-like recording object at the time of collision with the roller on the conveying path when the sheet-like recording object is being conveyed within the designed conveying path, and stores the calculated reaction force in the storage unit. To do that, And an output unit outputting the reaction force in a shorter cycle than when the variation amount exceeds the threshold value, when the calculated variation in reaction force is less than or equal to the threshold value. A computer readable storage medium storing computer executable processing, the computer executable processing comprising: The threshold setting unit sets the type and threshold value of the sheet-like recording object to be analyzed; The calculation unit calculates the reaction force with respect to the sheet-like recording object at the time of collision with the roller on the conveying path when the sheet-like recording object is being conveyed within the designed conveying path, and stores the calculated reaction force in the storage unit. To do that, And outputting, by the output unit, outputting the reaction force in a shorter cycle than when the variation amount exceeds the threshold value, when the calculated variation in reaction force is less than or equal to the threshold value.

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