FI124747B - Method and system for assisting the truck operator - Google Patents

Method and system for assisting the truck operator Download PDF

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Publication number
FI124747B
FI124747B FI20065684A FI20065684A FI124747B FI 124747 B FI124747 B FI 124747B FI 20065684 A FI20065684 A FI 20065684A FI 20065684 A FI20065684 A FI 20065684A FI 124747 B FI124747 B FI 124747B
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Finland
Prior art keywords
display
characterized
system
load
user
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FI20065684A
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Finnish (fi)
Swedish (sv)
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FI20065684A (en
FI20065684A0 (en
Inventor
Jyri Vaherto
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Jyri Vaherto
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Priority to FI20065264 priority Critical
Priority to FI20065264A priority patent/FI20065264A0/en
Application filed by Jyri Vaherto filed Critical Jyri Vaherto
Priority to FI20065684A priority patent/FI124747B/en
Priority to FI20065684 priority
Publication of FI20065684A0 publication Critical patent/FI20065684A0/en
Priority claimed from FI20070159U external-priority patent/FI7671U1/en
Publication of FI20065684A publication Critical patent/FI20065684A/en
Application granted granted Critical
Publication of FI124747B publication Critical patent/FI124747B/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075Constructional features or details
    • B66F9/0755Position control; Position detectors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075Constructional features or details
    • B66F9/20Means for actuating or controlling masts, platforms, or forks
    • B66F9/24Electrical devices or systems

Description

METHOD AND SYSTEM TO ASSIST THE TRUCK OPERATOR

The invention relates to a method for assisting a forklift user, which method comprises measuring the height dimension of the forks used to handle loads, thereby obtaining a height dimension. The invention further relates to a similar system.

When operating the truck, he controls the truck and the load on the forks of the truck as he sees fit. A known problem is the user's ability to see the load. As a result, the operator may have to work in poor positions to detect the load. Equipment is known in the art to assist the user to control the load more accurately. Such apparatus includes the apparatus disclosed in U.S. Pat. No. 5,011,358, which measures the fork angle of a truck. The measured results, i.e. the measured values, are compared with the limit value. The limit may be, for example, the verticality of the mast. This system provides the user with information that allows the user to control the right angle of the mast for load handling. However, the apparatus of US 5,011,358 has a problem with the limited display capability of the display, since the display remains unchanged as things change.

It is an object of the invention to provide a method for assisting the forklift operator to handle loads more accurately. It is a further object of the invention to provide a system for indicating more clearly to a user the difference between a large measurement result and a set value for the controller. Characteristic features of the system of the present invention are set forth in the appended claim 9. In the invention, the difference between the measurement data and the limit value is presented to the user in a stepless visual manner, allowing the user to control the load more accurately based on information received from the display.

The forklift operator is assisted in the handling of loads by a method in which the quantities related to the handling of loads are measured, thereby obtaining dimensional quantities. At least a portion of the metrics is compared to the set limit values corresponding to the magnitude, and the comparison results in differences between the metric and the limit values. At least one difference variable is graphically expressed to the user. Graphic representation can be accomplished on a projector or screen. The projector can also be used to project the graphical view onto the windscreen of the truck. Presentation in the art has been very step-by-step, since the operator has only seen whether the mast of the truck, and thus the load, is below, above or even at the set point. Even in stepless display, there are steps caused by pixels on the screen. However, the steps set by the pixels are very small, so they are practically irrelevant. Stepless display thus means that the display is stepless for use, even if technically small. The user can see, for example, the angle of the difference displayed. In addition to the angle, other quantities can be indicated to the user, such as the position of the fork under the load. This is important because the forks of the fork tines must be at exactly the desired depth under the load when handling the load. When the operator can control the load more and more based on the difference shown, he does not have to monitor the load in awkward positions and the work ergonomics are greatly improved. In addition, the job is more accurate when the operator knows the exact location of the forklift attachment means and thus the load.

In one embodiment, a liquid crystal display is used for visual detection. The screen performs better under different lighting conditions compared to the projector design. With the LCD screen, it can be placed very freely. Partly free placement is facilitated by the light weight of the LCD.

In another embodiment, the display uses a laptop, pda, or smartphone display. The great advantage of such an apparatus would be that the whole system would not have to be manufactured by itself, but devices providing ready-made functionalities could be used as part of the system. Finished equipment is also generally more economical than custom-made small batches of a special product. Preferably, the display devices themselves include versatile wireless communication means for transmitting information to information systems. Information systems can serve many purposes, such as tracking the amount of products in stock.

In a third embodiment, different views are pre-displayed on the screen. Different views contain different information or the placement of the information varies between screens. In this case, the most important information can be displayed on the screen to assist the user at any given moment. In other words, the operator of the truck has many different tasks during the day, which still consist of a variable combination of work steps. Simply putting a load on a shelf consists of several different steps, each with different considerations. When picking up a load, the operator must know exactly how far the forks have been pushed under the load. The user then raises the load to an appropriate transport height. When moving the load, the operator must take into account the position of the boom. When lifting a load onto a shelf, the user must know the location of the load and the shelves. When the data to be displayed can be selected to suit each step of the job, the work is smooth.

In a fourth embodiment, the view is automatically selected based on dimensions. Automatic selection refers to a selection where the selection is made without a separate command from the user. Many criteria can be used to automatically select a view based on dimensions. A simple condition may be that the variable is displayed in bold relative to the fixed.

In a fifth embodiment, a plurality of threshold values are input for at least one dimension, since the same quantity must be accurately controlled to multiple values at different times. Preferably, the dimension is compared to the nearest threshold. By automatically selecting the closest set limit value as a reference for the dimension, the user can observe how the dimension is first compared to the other limit values, and finally, as the user moves further, the dimension is compared with the threshold for the load being processed. This function allows you to enter many limit values into the system at the same time.

In a sixth embodiment, the at least one size is controlled by the difference variable. In other words, the load is automatically controlled based on the difference. The load is then controlled independently of the user. In this case, the system itself controls the load on the basis of dimensions and limit values. When control is based on dimensions and thresholds, it is based on differences, even if the actual difference is not programmed to decrease.

The invention will now be described in detail with reference to the accompanying drawings, in which:

Figure 1 illustrates a system according to the invention,

Figure 2 is a view of a system according to the invention in which data is displayed numerically and graphically,

Fig. 3 is a view of a system according to the invention in which the dimensions are mainly represented as numerical values,

Figure 4 shows the main menu of the system according to the invention, Figure 5 shows the Select view submenu of the system according to the invention,

Fig. 6 shows the use situation of a truck which can be prevented by the system according to the invention and Fig. 7 shows the use situation of the system according to the invention in which the loads stored in the rack are handled.

Figure 1 illustrates a system 10 according to the invention, including the necessary sensors 12 for measuring and generating quantities related to load handling. System 10 also includes setting means 14 for setting set values and reference means 16 for comparing metric and limit values. The reference means 16 are disposed in the central unit 32. When comparing the dimensional quantities and the corresponding threshold values, differences are formed. In addition, the system includes a graphical display 18 for stepless graphical representation of differences. The difference can also be indirectly displayed on the screen by more explicitly measuring the dimension and the threshold value, which allows the user to see the difference. It is essential that the graphical display shows the difference indirectly or directly so that the user knows exactly where the load is by following the view 20 on the display 18. The user can lift the load at a higher speed than prior art knowing that there is still considerable distance left . The operator will see steplessly the difference 22 shown as the load is approaching the desired shelf height, allowing the operator to slow down the lifting speed and prepare to stop the load at the desired height. When the operator can control the load more and more based on the difference shown, he does not have to monitor the load in awkward positions and the work ergonomics are greatly improved. In addition, the handling of loads becomes more secure and the damage to loads is significantly reduced. The system of the invention can also be utilized in other work machines, such as wheel loaders.

The system 10 according to the invention shown in Figure 1 facilitates the handling of the truck. Multiple sensors can be connected to the system as needed. The sensors 12 are connected to the central unit 32. The sensors 12 of the system 10 may be an angle sensor 24, a horizontal position sensor 26, an elevation position sensor 28, and a pressure pressure sensor 30. The sensors used are selected as required. It goes without saying that a forklift truck with spikes does not require a compression pressure sensor. In addition, sensors may be added, if necessary, if any other sensor essential for load handling is encountered. This may be, for example, a load weight sensor.

The system 10 according to the invention shown in Figure 1 includes control means 34. The control means are used to operate the system. As part of operating the system, they can set thresholds, thereby partially serving as setting means 14. In the embodiment shown in Fig. 1, control means 34 include five keys 36-44, which are: E key 36, C key 38, up arrow key 40 and down arrow key 42 With the display in idle mode, press the e key to enter the main menu. In the menu, the E key can be used to confirm the desired function or to accept the entered value. Press C to enter Menu mode while the screen is in idle mode. In Menu mode, press C to go to the previous menu level. In addition, the C key cancels the previous entry. With the display in idle mode, the arrow keys allow you to directly select some of the most important settings. The control means also includes a beep key 44 for turning the beeps on and off. Preferably, the system automatically turns on when the truck is started. This ensures that the system is always switched on when operating the truck, which means that the system will not be idle even for short, easy or routine tasks.

The display 18 shown in Figure 1 is a liquid crystal display 19 with 8,192 pixels and is bi-color. Generally speaking, the display has 5000 to 50,000 pixels, preferably 8,000 to 30,000 pixels. The screen shows 64 pixels vertically and 128 pixels horizontally. The display could be much larger or more accurate and could contain, for example, 128 * 252 = 32256 pixels. The display used may also be a color display. The use of a color display is inexpensive as it allows the user to draw on the potential of color to attract the user's attention. For example, green can be colored with a mast at an angle to the threshold. On the other hand, the display's background color can be changed to red if the system detects that the user is handling the load incorrectly, for example by pressing too hard.

The screen shown in Figure 1 is a liquid crystal display. The LCD screen is lightweight so it can be placed freely. The screen shown is graphical, but the system could also use a text-based screen. However, the preferred display is graphical, since the graphical display allows for more versatile utilization of pixels. For example, scaling can be done steplessly when pixels can be turned on and off independently as desired.

The CPU may be integrated with the display or may be further away from the display. Preferably, however, the central processing unit is separate from the display. When the CPU is separated, the sensor wires do not appear directly on the screen. In this case, the display and control means are conveniently visible and discreetly connected to the central processing unit, which is still separated. The central unit is spaced apart, especially when the central unit includes adjusting means for automatically controlling at least one of the variables, since when the central unit is provided with adjusting means, it greatly increases the size of the central unit.

The display 18 of the system 10 according to the invention of FIG. 1 is adapted to display different views 20 at different times, different views containing different information or the placement of the information between the screens. The user can choose to display the most relevant information for each step in the user interface. Figures 2 and 3 show views 20 of a display 18 of the system of the invention. There are at least 6, preferably 10, views of various types of information to assist the user. In practice, the number of views can be very large, since the view can be represented by one measurable quantity or by various combinations of measurable quantities. The data can be displayed graphically, as numeric values, or as a combination of these. In the graphical view, driver information is graphically displayed using control bars and the like. When expressing information as numeric values, only numeric values are displayed. The display using combinations of graphical expression and numerical values is more illustrative.

The views to be displayed on at least one of the screens shall indicate the angle of the mast or the height position of the gripping means attached to the mast. The views of the displays can be very different, but controlling the mast angle is very central to operating the truck, so at least one view indicates the mast angle of the truck. When handling loads, accurate knowledge of their elevation is very important, so at least one view shows the elevation of the gripping members attached to the mast. The height position of the engaging means is in direct contact with the height position of the load to be handled.

When there are three measurable quantities and they are graphically displayed, there are 7 different combinations or views. Similarly, there are 7 different views with only numerical values when there are three measurable quantities. It is advantageous for the use of the system that some of the information is expressed graphically and some is numeric. The number of such combinations rises to dozens when there are 3 measurable quantities. If you still take into account how the measurand is highlighted in the image, the number of views will increase further. In other words, the same information can be displayed differently on the screen, which increases the number of different views. The key to usability is that non-user-relevant dimensions can be omitted and only the most important quantities can be tracked. There may only be one key quantity at some stage of the work. The system of the invention, in which a plurality of different views can be displayed on the same screen, enables the implementation of a system that effectively aids the user. Since the screen must not be too large to be positioned as desired on the truck, the views must be variable so that the most important things can always be conveyed to the user.

Fig. 2 is a view of a system 10 according to the invention in which the information is displayed numerically and graphically. The image shows the angle, the position of the prongs under the load and the vertical position.

In the system 10 according to the invention shown in Fig. 1, besides the display there are additionally LEDs indicating key information. Such LEDs in connection with the display are inexpensive, as the user may have become accustomed to such with previous control systems. Thus, in the context of an informative display, it may be necessary to present some of the information in a well-stripped format.

In the view of the system of the invention shown in Fig. 2, the angle is shown as a difference display 46 of the angle at the top of the view 20. The angular difference display bar 46 is positioned such that the datum 47 is directly above the mast 49 shown on the display. With the mast of the truck tilted backwards, the divergence indicator 45 on the angle difference display bar 46 is in view to the left of the visible mast 49. In turn, with the mast of the truck tilted forward, the pointer on the difference bar angle display is to the right of the mast visible. The specified angle limit of 48 is shown in degrees. When the truck mast angle is within the set limit value, the limit value flashes. In addition, when the mast is fully upright, the tip of the mast will flicker. The angle display area 62 indicates the scale at which the angle difference display bar is at each instant. A reading of 5 ° indicates that, with the differential display bar 46 filled to the right, the mast of the truck tilts by 5 °. The angle difference display bar 46 may be scalable, whereupon it searches for a wider area to represent the mast angle. The above shows the true tilt angle of the mast, ie the angle at which the mast is relative to the ground. When detecting the tilt angle with respect to the ground, the tilt angle detection can be performed, for example, with an accelerometer.

In some special applications the mast tilt angle relative to the truck is indicated. This also measures the tilt of the truck with respect to the ground, for example with an accelerometer, and knowing the tilt angle of the truck and the mast with respect to the ground, the operator is informed of the angle of the mast with respect to the truck. The actual tilt angles of the truck and mast as well as the angle between the truck and the mast can also be indicated to the user.

A view of the system of the invention, shown in Figure 2, shows the position of the forks of the truck under a load in the horizontal fork position display bar 50. More specifically, the control bar 50 shows the location of the peaks relative to the set threshold. The horizontal fork position indicator bar turns gray to black when the prongs are positioned correctly under the load. Above the guide bar 50, the position of the tips 52 under the load is shown. Under control bar 50, in turn, the desired position of the tips under the load is denoted by numbers 54. The desired location of the tips under the load is the limit value for the location of the tips. If the tips of the tines are just aligned with the back of the truck, this number is the size of the truck.

In the system view of the system shown in Figure 2, the height position of the forks of the truck is shown as display bars 56, 58 to the right of mast 49. When showing the height position of the forks, the position of the fork relative to the set limit is indicated. The limit values are typically shelf levels, as loads are typically lifted to and from shelves. As the positioning position display bar 56 of the positioning changes from gray to black, the forks are at such a height that the load can be placed on the shelf. Correspondingly, the display bar 56 shows a height position at which the load can be taken from the shelf. The amount of load that must be on the shelf to place the load safely on the shelf is case by case. Typically, this value is about 5-15 cm. The free spike display bar 58, when black, indicates that the load is in place on the shelf and that the spikes can be pulled under the load since the spikes do not touch the shelf or the load. Similarly, the display bar 58 shows a height position for positioning the tines under the load when the load is being removed from the shelf. Several shelf heights may have been stored as thresholds in the system. In addition, the shelf heights saved as limit values could only be set for a particular shelf type. In this case, the shelf type is typically indicated by a letter as in Figure 2 at shelf display position 60 by the letter C. In turn, the shelf number is typically indicated by a number such as Figure 2 in shelf level display position 60 'by 1. The designation Cl thus denotes the height of the When a user is loading a load on that shelf, he sees the position of the lifting forks relative to the shelf level. In other words, the threshold value against which the system compares the elevation position of the lifting forks is represented as a code at display positions 60 and 60 '. Filling the display bars and changing color helps the driver to steer the load to the desired location, that is, to steer the load so that the metric reaches the limit. Because assistance is provided when the user needs it, and the user wants to focus on key issues, it is not advisable to set up display bars too early. In other words, the display bars are preferably brought to the display only when the user may need information. Therefore, the display thresholds that control the activation of the control bars can be set on a case-by-case basis. For example, when assisting the user to lift the load to the right shelf height, the display of the control bar can be adjusted so that the control bar is displayed 100 cm before the threshold. The control bar fills up gradually as you get closer to the limit. Eventually, the control bar turns black, indicating that the limit value has been reached. In Figure 2, the angle display angle is 5 °, with the angle displayed below 5 °. The display bars may also be scalable, whereby the angle region 62 displayed in the angle display bar 46 depends on the value of the dimension.

The metric may be close enough to the limit even before it has actually reached the limit. However, since the dimension is close enough to the limit value, it depends on the quantity being measured and the application situation. Therefore, the system can set its own tolerances for each quantity, indicating how far the measure can be from the limit value. In addition, the tolerance can be set separately for each side of the cut-off, since the cut-off can be very tight on one side, but allow a considerable margin on the other. For example, when compressing a load, the limit value may be the maximum allowable compression pressure. However, the load remains between the gripping elements at a lower compression pressure, which can be accounted for by setting a tolerance below the limit.

Fig. 3 is a view of a system according to the invention in which the dimensions are mainly shown as numerical values. The horizontal position, i.e. the position under the load, is expressed as a numerical value in the display area 64 and the height position of the load is indicated as a numerical value in the display area 66. The angle is shown in the display area 68.

Angle, distance and elevation are displayed in selected units of measurement. The elevation position can be expressed, for example, in centimeters or inches. In addition to the numerical values for display position 68, the tilt angle of the truck mast is graphically displayed on the angle display bar 46. The desired display can be selected for display.

Figure 4 shows the main menu of the system according to the invention. From the screen displaying the load information, press C or E to access the main menu. Refer to Figure 1 for the keys. Use the arrow keys 40, 42 to scroll through the main menu and other menus. From the main menu 70, you can select from the following options: Select view 72, Limit values 74, Profiles 76, General settings 78, Details 80. Select Select view 72 accessing the Select View submenu 82 shown in Figure 5.

Figure 5 shows the Select View submenu 82. Selecting Show 84 gives you direct access to the selected view on the Home screen. In turn, selecting Graphic 86 brings you to the Graphic Display, which displays the quantities selected as control bars, such as angle, distance, and height. Selecting Numbers 88 accesses a numeric display showing the quantities selected as numbers. Further selecting Angle 90, Distance 92, or Height 94 will display a graph showing that quantity graphically and numerically. If the system also measures other quantities, the quantities are selected for display in this menu. In addition, the measurable and displayed quantities may include, for example, compression pressure and load weight.

By selecting Limits 74 from the main menu shown in Figure 4, the user can further access the Limits Submenu, where he can adjust the desired Limits. With measurable values, angle, height, and distance, as in the View menu, the associated limit values can be adjusted in this menu. The system compares the metrics to these set limits. The limit values submenu is used to select the threshold value you want to adjust. Selecting the desired quantity will take you to the next submenu, where you can select one of the preset limit values or add a new limit value. The new limit can be set manually by input or according to the sensor measurement. A number of thresholds can be selected for angle, so that the system compares the actual angle, that is, the dimension associated with the angle, with the closest limit to produce the displayed difference.

Of the many dimensions for which limit values can be set, the determination of limit values for the height position of the load is described in greater detail herein. When defining the limits for the height position of the load, the desired lifting height of the load is determined. The desired lifting height can be selected from the menu or created from the new position. If a new one is selected, a new limit value can be entered. Entering a load limit value allows the system to enter data for a new shelf. First, the number of shelves in the shelf unit is entered. After that, each shelf is assigned a height position or a limit value. For each shelf height, two heights, or thresholds, must be specified. The first of these levels is the level at which the load can be moved to the shelf space, i.e. the level at which the load can be placed between the shelves. In this case, the upper edge of the load must not touch the next shelf, not the lower part of the shelf to which the goods are being lifted. At this height, the load can thus be pushed between the shelves. One of the levels defined for each shelf height, i.e. the limit values, is the height at which the forks of the truck must be in order to be able to be pulled under the pallet or pushed under the rack without touching the pallet or shelf. When setting the levels, they can be manually set by entering the height of the shelves or by measuring the sensors. The system can be informed or the system can measure the heights of the loads being handled, ie how high the loads are. When the system compares this information with the data from the shelves, the system may warn you if the user is trying to put the load too narrowly. When the system compares loads on the top and bottom surfaces of shelves with shelf surfaces, shelf heights can be placed closer to the size of the loads to be stored, significantly saving storage space.

The permissible deviation closely related to the limit value can be adjusted for each limit value separately from the hysteresis item under the General Settings menu. The tolerance margin may be set separately for each side of the limit. In addition to the tolerances allowed, display values are determined. These display values indicate when the control bars begin to display the approaching limit value on the control bars. Preferably, approximation values can be defined between the tolerances and the display values. When passing these approach values, that is, between approach values and thresholds, the control bar will be scaled more accurately. There are many other ways to take advantage of system customizability. For example, the device can be equipped with different language versions and units depending on the user's needs. Usability increases dramatically when using the desired language version and standard units. The user must be proficient in the language, especially if he or she is editing the system settings. The flexibility of the system is also enhanced by the fact that the quantities to be measured and their units can be selected on a case-by-case basis as desired. In prior art devices, such conversions are much more expensive, if at all possible.

One of the choices can also be a keypad lock, which ensures that settings cannot be changed without a password. The device does work as normal and the user can switch views, for example, but the user cannot change the settings. This is very useful for users to be sure of the current settings. Preferably, there are several passwords and each has its own permissions to change the settings.

In addition, there is a feature that allows you to rotate the menus. In this case, you can move from the lowest menu item to the upper one by pressing the key. Staying on the backlight can be selected here. Advanced settings include information about sensors and more. There is no need to make subsequent changes to this information unless the sensors are replaced. Advanced settings are password protected to prevent accidental changes.

The profile defines which functions the system displays in which view. In the profile menu you can directly download the desired profile or create a new profile. Profiles can be user-specific. The profile to be used can also be selected based on the load used.

The information in the menu can be selected to display contact information including the manufacturer's email address and fax number. The information menu also shows the version number of the program and the truck used.

Fig. 6 shows the operating situation of a truck which can be prevented by the system according to the invention. This situation arises when the forklift driver has not detected the tines behind the load 95, which raises the rear load 96. However, with only a small amount of load on the fork, it can tip over and cause very serious problems. Had the system of the invention been used, the driver would have seen that the tines were too far under the load. In this case, the driver could have reversed slightly so that the tines were only under the load to be lifted.

Fig. 7 illustrates the operation of the system according to the invention in which the truck 100 handles the loads 104 stored in the shelving unit 102. The system 10 includes a height sensor 28, from which the system 10 obtains measurement data about the height position of the load. The system 10 can be programmed to stop the gripping members 106 and thus the load 104 at a desired shelf height. The driver might misdirect the load, for example too high, but the system can stop the load independently of the user. In this case, at least one quantity is controlled by the difference quantity, i.e. the system includes adjusting means for automatically controlling the quantity. The adjusting means direct the load to stop automatically at the shelf.

Figure 7 shows the operating situation of the truck in which the truck is lifted to the shelf. When lifting the load, it can be stopped as desired at the shelves. When reaching a lifting height where the gripping members are programmed for a possible stopping point, for example, a shelf position, the system looks at a selected criterion, such as movement speed, and compares it with the set criterion. For example, the criterion may be that the load is stopped if the movement speed is less than 80% of the maximum speed. If the movement speed is 80% of the maximum speed or above, the system interprets that the user does not want to stop the load at that height. When the gripping elements are stopped at the shelf, they do not continue to move for a moment, but are stopped, for example, for five seconds, allowing the user time to enter the controller. Once the operator has enabled the controller, the load will remain in place. If the user wants the load to continue to move, he or she will keep the controller in the on position so the load will continue to move.

The criteria for stopping can be set as desired from the interface. For example, a criterion can be defined as stopping when the movement speed is 80% or less of the maximum value. Instead of 80%, the criterion may generally be values between 50 and 90%, preferably between 70 and 80%. It is essential that stopping is performed only when the lifting speed is clearly different from the maximum speed or otherwise at normal working speed. This allows the user to bypass the shelf levels, if desired, without stopping the load at the points of the sweat. The system stops the lifting only to those heights that meet the set criteria, which ensures smooth operation. The system delivers the much needed precision to find shelf levels, improving efficiency and reliability. Work ergonomics also improve in many cases when the user does not have to peek through the truck to see the shelf levels. The system can also be used to assist in tracking the progress of work. For example, when loading a truck, any load that can be lifted can be weighed using the system's weighing sensors. The load mass is stored in the system, whereby the system can inform the user when the correct amount of cargo has been loaded onto the truck. The system on the truck can also be connected to a central system, which registers the information about loads loaded. The central system then knows the status of the warehouse. The system can also be used to monitor working hours or large measurements. The quantity to be monitored may be, for example, the compression pressure used to hold the loads. The machine can also be used to monitor the condition of the truck. The device can monitor the pressure retention in the cylinders. Faults are then reported to the user as soon as the slightest symptoms occur, and larger damage is typically avoidable.

The device can inform the user about exceeding the limit values in many ways, but it is essential that the user can see information about the desired quantity graphically. When using a differential display for a laptop, pda, or smartphone display, the system includes a display unit that provides data to the display unit using a serial cable or any wired or wireless protocol. The keypad may be a keypad of a display hardware or a separate keyboard connected to a display device or central processing unit. Programming can be done in a programming language that is hardware independent. An example of such a programming language is JAVA. The platform on which the application can be built can be, for example, Windows or Linux. The great advantage of such an apparatus would be that the whole system would not have to be fabricated by itself, but that it would be possible to use as part of the system devices which provide complete functionalities. Finished equipment is also generally more economical than custom-made small batches of a special product. Preferably, the display devices themselves include versatile wireless communication means for transmitting information to information systems. Information systems can serve many purposes. The information system can be used, for example, to monitor the quantity of products in stock.

Claims (13)

  1. A method for assisting a forklift operator comprising measuring the height dimension of the forks used to handle loads to obtain a height dimension, characterized by comparing the height dimension to two limit values corresponding to the set size, and comparing the height dimension dimension and (22), and the difference variables (22) are the difference between the position / take-up position and the free fork, and the differences are plotted graphically for the user in the position / take-up position display bar (56) and the free fork display bar (58).
  2. Method according to claim 1, characterized in that a liquid crystal display 19 is used for detecting the difference quantity (22).
  3. Method according to claim 1 or 2, characterized in that a display of a laptop, pda or smartphone is used to detect the difference (22).
  4. Method according to one of Claims 1 to 3, characterized in that the difference variable (22) is indicated to the user at different times in different views (20).
  5. Method according to Claim 4, characterized in that at least one of the views (20) to be displayed shows the angle of the mast (49) or the elevation position of the engaging means attached to the mast.
  6. Method according to claim 4 or 5, characterized in that the view (20) to be displayed is automatically selected on the basis of dimensions.
  7. Method according to one of Claims 1 to 5, characterized in that several limit values are input for at least one dimension.
  8. Method according to one of Claims 1 to 7, characterized in that at least one quantity is automatically controlled on the basis of the difference variable.
  9. A system for assisting a forklift user comprising: a height sensor (28) for measuring the height of the forks used for handling loads and for creating a height dimension, characterized in that the system further comprises: setting means (14) for setting two height limits and for comparing the two elevation thresholds and generating the difference between the position / take-up position and the free fork, display 18 for graphically displaying the differences in the position / take-up position display bar (56) and the free fork display bar (58).
  10. System according to claim 9, characterized in that the display (18) has more than 5000 pixels.
  11. System according to claim 9 or 10, characterized in that the display (18) is a liquid crystal display (19).
  12. System according to one of Claims 9 to 11, characterized in that the system comprises adjusting means for automatically controlling a large quantity.
  13. System according to one of Claims 9 to 12, characterized in that the display (18) is arranged to display different views (20) at different times.
FI20065684A 2006-04-25 2006-10-30 Method and system for assisting the truck operator FI124747B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FI20065264 2006-04-25
FI20065264A FI20065264A0 (en) 2006-04-25 2006-04-25 Measuring and display device for easy handling of the truck
FI20065684A FI124747B (en) 2006-04-25 2006-10-30 Method and system for assisting the truck operator
FI20065684 2006-10-30

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FI20065684A FI124747B (en) 2006-04-25 2006-10-30 Method and system for assisting the truck operator
DE200720005697 DE202007005697U1 (en) 2006-04-25 2007-04-19 To assist the forklift driver serving system
FI20070159U FI7671U1 (en) 2006-04-25 2007-04-19 A system to assist the truck operator
GB0707822A GB2437629B (en) 2006-04-25 2007-04-24 Method and system for assisting a lift truck operator

Publications (3)

Publication Number Publication Date
FI20065684A0 FI20065684A0 (en) 2006-10-30
FI20065684A FI20065684A (en) 2007-10-26
FI124747B true FI124747B (en) 2015-01-15

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FI20065684A FI124747B (en) 2006-04-25 2006-10-30 Method and system for assisting the truck operator

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DE (1) DE202007005697U1 (en)
FI (1) FI124747B (en)
GB (1) GB2437629B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008050204A1 (en) * 2008-10-01 2010-04-08 Linde Material Handling Gmbh Procedure for displaying permissible loads
ITNA20090055A1 (en) * 2009-09-16 2009-12-16 Francesco Maria Sacerdoti Locating System of objects in a warehouse through the use of instrumented forklifts.
DE102010035819A1 (en) * 2010-07-30 2012-02-02 Linde Material Handling Gmbh Industrial truck with a display device
DE102010055774A1 (en) * 2010-12-23 2012-06-28 Jungheinrich Aktiengesellschaft Industrial truck with a sensor for detecting a spatial environment and method for operating such a truck
DE102013006412A1 (en) * 2013-04-13 2014-10-16 Jungheinrich Aktiengesellschaft Industrial truck with a control unit
DE102014112898A1 (en) * 2014-09-08 2016-03-10 Still Gmbh Truck with assistance function
KR20180029066A (en) 2015-07-17 2018-03-19 크라운 이큅먼트 코포레이션 Processor with graphical user interface for industrial vehicles

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Publication number Priority date Publication date Assignee Title
JPS5633399A (en) * 1979-08-20 1981-04-03 Komatsu Forklift Cargo work car
US7010404B2 (en) * 2002-01-23 2006-03-07 Kabushiki Kaisha Toyota Jidoshokki Position control apparatus and position control method for cargo carrying apparatus in industrial vehicle

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GB2437629B (en) 2010-05-26
DE202007005697U1 (en) 2007-08-16
GB0707822D0 (en) 2007-05-30
GB2437629A (en) 2007-10-31
FI20065684A0 (en) 2006-10-30
FI20065684A (en) 2007-10-26
FI20065684D0 (en)

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