TRUCK-MOUNTABLE DETECTION SYSTEM

Abstract

A truck-mountable detection system for detection of a first coupling device of a container, in which the first coupling device is configured for coupling with a second coupling device of a truck-mounted loading equipment, in particular a hook of a hookloader. The detection system includes a data processor and an data capturing device, the data of which can be sent to the data processor. The data capturing device is a stereographic sensor system, and the data processor is configured to automatically recognize the shape of the first coupling device of the container based on the data provided by the stereographic sensor system.

Claims

1. A truck-mountable detection system for detection of a first coupling device of a container, the first coupling device being configured for coupling with a second coupling device of a truck-mounted loading equipment, in particular a hook of a hookloader, the detection system comprising a data processor and an data capturing device the data of which can be sent to the data processor, wherein the data capturing device is a stereographic sensor system and the data processor is configured to automatically recognize the shape of the first coupling device of the container based on the data provided by the stereographic sensor system.

2. The truck-mountable detection system according to claim 1, wherein the stereographic sensor system comprises at least two sensors looking at the same field of detection, preferably at least two cameras.

3. The truck-mountable detection system according to claim 1, wherein the position of the automatically recognized first coupling device is calculated.

4. The truck-mountable detection system according to claim 1, wherein the data processor is configured to check whether the second coupling device is compatible for coupling and loading with the first coupling device based on the data provided by the stereographic sensor system.

5. The truck-mountable detection system according to claim 1, wherein a class of the container can be recognized by the data processor by calculating the position of the first coupling device in relation to a predefined reference position in the form of a predefined point on the container.

6. A truck-mountable loading equipment, in particular hookloader, comprising: the truck-mountable detection system according to claim 1, and a second coupling device which is configured for coupling with a first coupling device of a container, wherein the data processor of the detection system is implemented by a control unit of the loading equipment or is connected to a control unit of the loading equipment.

7. The truck-mountable loading equipment according to claim 6, wherein the control unit of the loading equipment is configured to calculate a desired trajectory and/or an actual trajectory of a motion of the loading equipment based on the data provided by the stereographic sensor system and/or based on data provided by at least one sensor different from the stereographic sensor system.

8. The truck-mountable loading equipment according to claim 6, wherein the control unit of the loading equipment is configured to automatically compute the position of a container relative to the loading equipment based on the data provided by the stereographic sensor system and/or based on data provided by at least one sensor different from the stereographic sensor system.

9. The truck-mountable loading equipment according to claim 6, wherein the control unit of the loading equipment is configured to automatically detect a shape of the container based on the data provided by the stereographic sensor system.

10. The truck-mountable loading equipment according to claim 6, wherein the control unit of the loading equipment is configured to give information about alignment of truck and/or a trailer and/or container to an operator of the loading equipment based on the data provided by the stereographic sensor system and/or based on data provided by at least one sensor different from the stereographic sensor system before and/or during loading.

11. The truck-mountable loading equipment according to claim 6, wherein the control unit of the loading equipment is configured to automatically determine a rear end position of a container and to detect if a container is short and is in danger of being pulled too far onto a loading area of the truck and/or to detect if a container is long would stick out too far over the rear end of the truck based on the data provided by the stereographic sensor system and/or based on data provided by at least one sensor different from the stereographic sensor system and wherein it is preferably provided that in case the container is detected to be long an underrun bumper is being deployed automatically.

12. The truck-mountable loading equipment according to claim 6, wherein the control unit of the loading equipment is configured to automatically couple and/or decouple the second coupling device of the container and the first coupling device of the loading equipment based on the position of the first coupling device calculated by the detection system, wherein the control unit automatically or semi-automatically commands movements of the loading equipment for the automatic coupling and/or decoupling.

13. The truck-mountable loading equipment according to claim 6, wherein the control unit of the loading equipment is configured to automatically or semi-automatically load and/or automatically or semi-automatically unload a container by commanding movements of the loading equipment based on the data provided by the stereographic sensor system and/or based on data provided by at least one sensor different from the stereographic sensor system, wherein it is preferably provided that driving operations of the truck are being controlled by a driver of the truck.

14. The truck-mountable loading equipment according to claim 6, wherein there is provided a security device being configured to monitor a work area of the loading equipment and to give a warning if a person or an obstacle is inside or enters the work area and/or to automatically interrupt operation of the loading equipment.

15. The truck-mountable loading equipment according to claim 6, further comprising a display for displaying data provided by the stereographic sensor system and/or wherein it is preferably provided that additional information regarding a loading and/or unloading process of a container provided by an at least one additional sensor is being displayed on the display together with the data provided by the stereographic sensor system.

16. The truck-mountable loading equipment according to claim 6, wherein the loading equipment is a hookloader being preferably equipped with an articulated arm and/or being preferably a telescopic hookloader.

17. A truck comprising: a detection system according to claim 1, and a loading equipment, in particular a hookloader, having a second coupling device configured for coupling with a first coupling device of a container.

18. The truck according to claim 17, wherein the stereographic sensor system is either mounted on or to: at or near a rear end of the truck, or an arm of the loading equipment, or in an elevated position on the truck, preferably on a cabin of the truck or the stereographic sensor system is mounted on a vehicle which is moveable separately from the truck.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Embodiments of the invention are shown in the figures:

[0046] FIGS. 1a and 1b show different relative placements of the first coupling device and the second coupling device.

[0047] FIGS. 2a and 2b show the requirement of correct alignment of the truck and the container 3.

[0048] FIG. 3 shows a situation in which the container is landing on rear rollers of the loading equipment.

[0049] FIG. 4 shows a situation in which the container is transferred to a trailer.

[0050] FIG. 5 shows a possible application of at least one distance sensor.

[0051] FIG. 6 shows information about the geometry of the loading equipment.

[0052] FIGS. 7a and 7b show by way of example different possibilities for placement of the stereographic sensor system.

[0053] FIG. 8 shows schematically an embodiment of an loading equipment according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

[0054] The figures generally show an embodiment of the invention having a loading equipment 4 in the form of a hookloader having one or two articulated arms 9 (in the figures only a single articulated arm 9 is visible) in which is slidably mounted another arm 9. The arms 9 can be moved by at least one actuator, e. g. a hydraulic piston unit. The hookloader is mounted on a truck 7. The loading operation is being accomplished by lifting the container 3 with the hookloader after establishing coupling between a first coupling device 1 arranged on the container 3 and a second coupling device 2 in the form of a hook of the hookloader. A stereographic sensor system 6 is provided.

[0055] In FIGS. 1 to 6 the stereographic sensor system 6 is arranged on an arm 9 of the loading equipment 4 adjacent to the second coupling means 2. Alternative placements are possible.

[0056] The features of the invention discussed with respect to the different figures can be used separately or in any desired combination.

[0057] Although not shown in the figures, there could be provided a security device being configured to monitor a work area of the loading equipment 4 and to give a warning if a person or an obstacle is inside or enters the work area and/or to automatically interrupt operation of the loading equipment 4.

[0058] FIGS. 1a and 1b show that although the position of the first coupling device 1 of a container 3 relative to the container 3 itself (absolute height H) is defined by local container standards, due to different placements of the container 3 or the truck-mounted loading equipment 4 the position of the first coupling device 1 relative to the second coupling device 2 of the loading equipment 4 (relative height h) varies. The stereographic sensor system 6 allows detection of the position of the first coupling device 1 relative to a reference position, e. g. relative to a position of the second coupling device 2 and/or relative to a position on the container 3 itself and/or relative to a position of the stereographic sensor system 6.

[0059] FIGS. 2a and 2b show that for a successful loading of the container 3 it is necessary to align the truck 7 sufficiently collinear to the container 3. Otherwise the container 3 cannot be lifted or may be dropped during the lifting process. This alignment can be also achieved during the first part of the loading process but at the latest at the point where the container rails are landing onto rear rollers 12 of the loading equipment 4 the collinear alignment needs to be achieved. An alignment during the first part of the loading process can be achieved by steering the truck 7 during the loading procedure, as will be explained in the following paragraph.

[0060] The truck driver positions the truck 7 in front of a container 3. Depending on the area where the container 3 is situated, sometimes it is not possible to position the truck 7 fully aligned with the container 3. The correct way of loading a container 3 with a hookloader is to pull or move the truck 7 underneath the lifted container 3, e.g. by using the force created by the hookloader. By controlling the truck steering during this operation, sufficient alignment between truck 7 and container 3 can be achieved.

[0061] In the prior art, the operator has to use the mirrors of the truck 7 to assure this aligned position. Again, this can become a challenge for unexperienced truck drivers. Furthermore, a collision can occur easily. If the misalignment angle a (FIG. 2b) is very large there is also the risk of a collision of the container 3 with parts of the truck 7 or the hookloader during the lifting movement. The stereographic sensor system 6 allows the operator to engage with the eyelet by giving information about the position and orientation of the container 3, ensuring a sufficiently collinear alignment of truck 7 and container 3 before and/or during loading.

[0062] In the following description the first coupling device 1 will, by way of example, be taken to be an eyelet.

[0063] It can be provided that a class of the container 3 can be recognized by the data processor 5 (or the control unit 11 of the loading equipment 4) by calculating the position of the first coupling device 1 in relation to a predefined reference position in the form of a predefined point on the container 3, e. g. a distance from an edge, a distance from a center point of an area, etc. This information can be used to check whether the second coupling device 2 of the hookloader is compatible for loading or coupling with the first coupling device 1. If not, a warning could be given to the operator and/or the height of the second coupling device 2 could be adjusted (semi-)automatically by the control unit 11.

[0064] It can be provided that the control unit 11 and/or the data processor 5 is/are configured to monitor a locking state of loaded container 3. For this it might be necessary to use at least one additional sensor 14.

[0065] For operations at night it can be necessary to light up the container 3 in order to provide enough light for the stereographic sensor system 6 to work. This illumination can be provided in the required spectrum, depending on the type of stereographic sensor system 6.

[0066] At the rear end of the truck 7 (the end showing towards the container 3 before lifting) there can be provided rear rollers 12 for enabling the container 3 to be pulled onto the loading area of the truck 7 (there could be other means to decrease friction between the container 3 and the bed of the truck 7, e. g. friction-reducing glide pads). FIG. 3 shows the situation where the container 3 (more specifically the container rails arranged on the underside of the container 3) is landing on the rear rollers 12 of the hookloader. It is in the nature of hookloader containers 3 that they are produced in different lengths according to their application and customer needs. The design of so called telescopic hookloaders (having at least two arms 9 one of which is slidingly engaged with the other arm 9) provides for that fact. It allows the operator to position the hookloader as far forward towards the cabin 10 as possible but it is in the operator's responsibility not to pull the container 3 too far forward so that the container 3 would be pulled off the rear rollers 12 with its rear end. Once the container 3 passes the rear rollers 12 at the end of the loading area and rests directly on the bed of the truck 7, it cannot be unloaded by the hookloader anymore. The stereographic sensor system 6 and/or information provided by at least one additional sensor 14 can ensure that this situation does not occur.

[0067] If it is determined that a rear overhang of the container 3 is too large the control unit 11 can command automatic deployment of an underrun bumper (not shown, also called underride guard) from a rear end of the truck 7 to ensure safety and compliance with road regulations.

[0068] There are several situations where the truck 7 can collide easily with the container 3 or other objects around the loading area. The first situation described refers to the situation shown in FIGS. 1a and 1b. If the position of the hook is not exactly in the right height it will collide with another part of the container 3 if there is no distance measurement system which gives the driver information about the distance to the container. The stereographic sensor system 6 and/or information provided by at least one additional sensor 14 allows to avoid collisions during loading and unloading.

[0069] If the container 3 is not placed on the ground but is transferred to a trailer 13 (cf. FIG. 4) the truck 7 needs to get very close to the trailer 13. Here an exact distance information would be very helpful too. Furthermore, the truck 7 and the trailer 13 have to be aligned sufficiently collinear again as shown in FIGS. 2a and 2b. The stereographic sensor system 6 allows the operator to ensure a sufficiently collinear alignment of truck 7 and trailer 13.

[0070] Since a hookloader can be equipped with an articulated arm 9 there is a risk of collision between the container 3 and the rear end of the truck 7 since the position of the arm 9 with respect to the truck 7 itself can vary. There are two collision situations which can occur. The first collision situation occurs if the container 3 is pulled too close to the truck 7 and is lifted afterwards. Due to the lifting the lower edge of the container 3 moves into the direction of the truck 7 and collides with the rear end of the same. In the same way a collision situation can happen during the unloading process of the container 3, if the lower edge of the container 3 is still positioned above the truck 7 but the hook is already moving down vertically. The motivation for pulling the container 3 as close as possible over the back edge of the truck 7 stems from the desire to keep the loading angle (tip angle or inclination) of the container 3 during the loading and unloading process as small as possible. This is a requirement to avoid movement of parts or loaded goods inside the container 3. In the prior art, control unit 11 of the hookloader does not get information about the current position of the hook because there are no sensors for detecting it. Only the final positions (fully extended or fully retracted) of the hydraulic cylinders can be detected in the prior art. The stereographic sensor system 6 and/or information provided by at least one additional sensor 14 can ensure that the situations described above do not occur.

[0071] Tipping is used for unloading the content of the container 3. For this the container 3 is lifted until the content of the container 3 moves due to gravity. After tipping the container 3 the operator has to check if the container 3 is empty. The invention allows to inspect the content of the container by use of the stereographic sensor system 6. However, this function could also be provided by an additional (2D) camera.

[0072] The whole process of loading a container 3, transporting it to another location and unloading it finally again could be recorded somehow. Important information is the point or duration of time when the container 3 was manipulated, the contents of the container 3 before and after manipulation and the place where the manipulation was done (documentation of manipulation of container 3). The invention allows documentation of the whole manipulation process by use of the stereographic sensor system 6. This documentation can be saved to an electronic memory of the data processor 5 or the control unit 11 and/or could be sent via a telecommunication device to a predefined receiver (e. g. cloud).

[0073] FIG. 5 shows a possible application of at least one additional sensor 14 (e. g. ultrasonic sensor) the signals of which can be transferred to the control unit 11 of the loading equipment 4. In a first application it can be detected if the container 3 is pulled too far. For this the additional sensor 14 needs to be placed at the or near the rear end of the truck 7. Preferably, additional sensor 14 is placed at a location inbetween the rear rollers 12 and the rear end of the truck 7. Once the container 3 passes the position of the additional sensor 14 the output signal allows the control unit 11 of the loading equipment 4 to detect this and give out a warning and/or stop the pulling operation of the container 3. For the second case at least one sensor 14 can be used to detect the distance from the truck 7 to the container 3. If a pair of two sensors 14 is used, information about collinear alignment of truck 7 and container 3 can be provided to the control unit 11 of the loading equipment 4.

[0074] Regarding FIG. 6:

[0075] In the prior art, only the end positions (fully extended or fully retracted) of the loading equipment 4 are recognized. This can lead to problems during the loading and unloading process (e. g. collisions as discussed above). The information of the current position of the second coupling device 2 of the loading equipment 4 (e. g. hook) can be provided to the control unit 11 of the loading equipment 4 by measuring the geometry of the hookloader (the length and angles of the arms 9 and the hook of the hookloader). There is also an influence by the length and position of the container 3 which can be considered to avoid collisions at the rear of the truck 7. Furthermore, the actual position of the second coupling device 2 is a necessary information for any (semi-)autonomous function of the loading equipment 4. The stereographic sensor system 6 and/or information provided by at least one additional sensor 14 can be used for an automatic adjustment of the second coupling device 2.

[0076] FIGS. 7a and 7b show by way of example different possibilities for placement of the stereographic sensor system 6.

[0077] For (semi-)autonomous adjusting of the loading equipment 4 the relative distance and orientation between second coupling device 2 and first coupling device 1 of the container 3 is necessary. If the stereographic sensor system 6 is placed directly on an arm 9 of the loading equipment 4 and moves together with it (cf. FIG. 7b), information concerning the position of the second coupling device 2 is always available. Therefore, it would be an advantage to place the stereographic sensor system 6 near the second coupling device 2. Furthermore, the elevated position of the stereographic sensor system 6 can be an advantage if the contents (or filling level) of the container 3 should be controlled as well. Also, the dimensions of the container 3 can be measured if a view from top can be provided.

[0078] On the other hand, for such a placement of the stereographic sensor system 6 additional functionalities like distance detection or collision avoidance are not possible until the second coupling device 2 is lifted. This information would then have to be provided by at least one additional sensor 14 in order to complement the information provided by the stereographic sensor system 6.

[0079] Alternative positions of the stereographic sensor system 6 can be considered. If the system is placed at or near the rear end of the truck 7 (cf. FIG. 7a) it always points in direction of the container 3 while an operator of the truck 7 moves the truck 7 backwards towards the container 3. In this case, the stereographic sensor system 6 can be used for the detection of the correct height of the second coupling device 2 with respect to the first coupling device 1 and/or for measuring the distance between truck 7 and container 3 and/or for enlargement of the field of detection and/or to avoid pulling the container 3 too far (past the rear rollers 12) onto a loading area of the truck 7. Such a placement can also facilitate determination of a rear overhang of the container 3.

[0080] Other than shown in FIGS. 7a and 7b, the stereographic sensor system 6 could also be placed on an elevated position on the truck 7, e. g. on a cabin 10 of the truck 7, in a position where the field of detection is sufficient.

[0081] The stereographic sensor system 6 could be placed on a mounting that can be moved relative to the truck 7 or the loading equipment 4, e. g. by changing elevation and/or angular position and/or inclination of the stereographic sensor system 6.

[0082] FIG. 8 schematically shows an embodiment of a loading equipment 4 according to the invention. A data processor 5 receives data from the stereographic sensor system 6 and from at least one additional sensor 14 regarding a container 3 (e. g. position of first coupling device 1, length of container 3, width of container 3, height of container 3, load of container 3) and/or the second coupling device 2 and/or an arm 9 of the loading equipment 4. The data processor 5 can provide this data to a control unit 11 of the loading equipment 4 (alternatively the control unit 11 itself could comprise the data processor 5).

[0083] Depending on the position of the stereographic sensor system 6 relative to the loading equipment 4 or the truck 7, the stereographic sensor system 6 can provide the data processor 5 or the control unit 11, respectively, with information about the position of the first coupling device 1 on the container 3 and/or the position and dimensions of the container 3 and/or the position of the second coupling device 2. Based on this data, movement of the second coupling device 2 can be controlled by the control unit 11 by way of actuators 15 of the loading equipment 4, e. g. by controlling flow of hydraulic fluid and/or pressure of hydraulic fluid to and/or from at least one cylinder used to move at least one arm 9 of the loading equipment 4.

LIST OF REFERENCE SIGNS

[0084] 1 first coupling device (of container) [0085] 2 second coupling device (of loading equipment) [0086] 3 container [0087] 4 loading equipment [0088] 5 data processor [0089] 6 stereographic sensor system [0090] 7 truck [0091] 8 display [0092] 9 arm of the loading equipment [0093] 10 cabin of the truck [0094] 11 control unit of loading equipment [0095] 12 rear roller [0096] 13 trailer [0097] 14 sensor [0098] 15 actuator of loading equipment