JP6673264B2 - Load management system - Google Patents

Description

  The present invention relates to a load management system that manages loads in a luggage compartment of a vehicle.

  In Patent Literature 1, a camera captures an image of a loading state in a luggage compartment, and transmits data representing the captured image to a vehicle management system.

Japanese Patent No. 3314263

  The loading status confirmation system proposed in Patent Literature 1 discloses that even if an image in a luggage compartment captured by a camera shows a state in which a load is loaded in a state requiring caution in driving, the image is It is only sent to the vehicle management system. Therefore, the technique of Patent Document 1 cannot make it difficult to lower the safety of the cargo.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a load management system that can make it difficult to lower the safety of a load.

  The invention disclosed herein employs the following technical means to achieve the above object. It should be noted that the reference numerals in parentheses described in the claims and this section indicate the correspondence with specific means described in the embodiments described below, and do not limit the technical scope of the invention. .

  In order to achieve the object, the present invention provides a camera (41) for imaging a packaged cargo existing in a luggage compartment of a vehicle, and a camera from a top surface of the cargo imaged by the camera to a floor surface (64) of the luggage compartment. A measuring unit (42) for measuring the height and the height from the lower surface to the floor of the load; and two horizontally adjacent loads measured by the measuring unit, from the upper surface to the floor of the luggage compartment. When the height of the two cargoes is measured, the cargo on the side where the upper surface of the cargo is higher than the floor surface among the two cargoes is defined as a first cargo (71), and the upper surface of the two cargoes is the floor Assuming that the cargo on the lower side from the surface is the second cargo (72), the upper surface (62) of the second cargo with respect to the height from the upper surface (61) of the first cargo to the floor surface. The load drop, which is the ratio of the load drop (63), which is the height difference from the upper surface of the first load A load difference ratio detecting section (44) for detecting a ratio, a vehicle behavior detecting section (20) for detecting a behavior of a vehicle, and a driving advice output section (51) for outputting a driving advice to a driver to improve driving. And, based on the load drop ratio detected by the load drop ratio detection unit, whether a drop suppression driving advice that is a driving advice that suppresses the load in the luggage compartment from moving and dropping due to the behavior of the vehicle is output. A reference range setting unit (52) for determining whether or not to set a reference range of the behavior of the vehicle as a reference for determining whether or not the first load has a lower surface (73). If it is determined that the vehicle is located at a position higher than the upper surface of the second cargo and that the behavior of the vehicle is out of the reference range, a fall-prevention driving advice is output to the driver.

  According to the present invention, driving advice can be given to a driver. The drop-prevention driving advice is driving advice that suppresses the load in the luggage compartment from moving and dropping due to the behavior of the vehicle. In order to determine whether or not to perform the fall suppression driving advice, a reference range of the vehicle behavior is set.

  However, for example, when the height of the upper surface of the adjacent first cargo is the same as the height of the upper surface of the second cargo, the first cargo is moved in the direction of the second cargo unless the second cargo moves. Depending on how the cargo is loaded, such as not falling, there may be no need for fall suppression driving advice.

  Therefore, in the present invention, the load drop ratio is detected. This load drop ratio is the ratio of the load drop to the height from the upper surface of the first load to the floor, and the load drop is the difference between the height of the upper surface of the second load and the upper surface of the first load. It is.

  When the load drop ratio is small, the first load or another load existing under the first load has a high ratio supported by the adjacent second load. become. Conversely, if the load drop ratio is large, the first load or another load underneath the first load will have a low percentage supported by the second load. There is a concern that the smaller the proportion supported by the adjacent cargo, the greater the extent to which the first cargo swings due to the horizontal acceleration caused by the behavior of the vehicle.

  Therefore, it is determined whether or not to set a reference range as a reference for determining whether or not the fall suppression driving advice is output based on the load drop ratio. The driving advice output unit determines that the behavior of the vehicle is out of the reference range as one of the conditions for outputting the fall suppression driving advice.

  However, when the lower surface of the first load is not at a position higher than the upper surface of the second load, the first load does not move to the upper surface of the second load, and the load rarely falls. Therefore, even if the behavior of the vehicle changes, the safety of the cargo is not easily reduced.

  Therefore, the driving advice output unit determines that the behavior of the vehicle is out of the reference range, and in addition to the fact that the lower surface of the first load is higher than the upper surface of the second load, the driving suppression output unit As a condition for outputting the advice, the driving advice output unit outputs the drop suppression driving advice based on satisfying these two conditions. By performing the fall suppression driving advice, the driver can easily perform the driving operation such that the behavior of the vehicle is within the reference range. The movement of the cargo in the luggage compartment can be suppressed by the behavior of the vehicle within the reference range. By suppressing the movement of the cargo in the luggage compartment, it is possible to suppress the cargo from falling. This makes it difficult to lower the safety of the cargo. According to this configuration, the load management system can hardly lower the safety of the load.

It is a block diagram showing roughly composition of a loading management system concerning a 1st embodiment. It is a figure explaining the detection method of the load drop ratio concerning a 1st embodiment. 5 is a flowchart illustrating a process in a control unit according to the first embodiment.

  Hereinafter, a plurality of embodiments for carrying out the invention will be described with reference to the drawings. In each embodiment, portions corresponding to the items described in the preceding embodiment are denoted by the same reference numerals, and redundant description may be omitted. In each embodiment, when only a part of the configuration is described, the other part of the configuration can be applied with reference to the other embodiments described earlier.

(1st Embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration of a load management system 100 according to the present embodiment. The load management system 100 is mounted on, for example, a vehicle. The vehicle here is a truck. The loading management system 100 includes a control unit 10, a vehicle behavior detection unit 20, a display output unit 31, an audio output unit 32, an external output unit 33, an operation input unit 34, a loading status detection unit 40, a camera 41, a driving advice output unit 51, and a reference range setting unit 52.

  The control unit 10 includes a CPU, a RAM, a ROM, and the like (not shown), and controls the operation of the load management system. Further, the control unit 10 executes the control program in the CPU to virtually realize the loading status detection unit 40, the driving advice output unit 51, and the reference range setting unit 52 by software. Note that the loading status detection unit 40, the driving advice output unit 51, and the reference range setting unit 52 may be realized as, for example, an integrated circuit integrated with the control unit 10.

  The vehicle behavior detector 20 includes an acceleration sensor 22 for detecting the behavior of the vehicle. The acceleration sensor 22 detects the acceleration of the vehicle. The directions in which the acceleration sensor 22 of the present embodiment can detect acceleration are the front-back direction and the left-right direction with respect to the vehicle.

  Note that an acceleration sensor that detects only one of the acceleration in the front-rear direction and the left-right direction of the vehicle may be used. However, in this case, naturally, only the driving advice based on one of the acceleration in the front-rear direction and the left-right direction of the vehicle can be given, and therefore, like the acceleration sensor 22 of the present embodiment, the driving advice in the front-rear direction and the left-right direction of the vehicle is provided. Preferably, acceleration can be detected. The vehicle behavior detection unit 20 outputs vehicle behavior data indicating the acceleration of the vehicle detected by the acceleration sensor 22 to the control unit 10.

  The display output unit 31 includes, for example, a liquid crystal display or an organic EL display. The display output unit 31 outputs visual information to the driver based on the display output data input from the control unit 10. The display output data is driving advice data output by a driving advice output unit 51 described later.

  The audio output unit 32 includes, for example, an in-vehicle speaker. The audio output unit 32 notifies the driver by audio based on the audio output data input from the control unit 10. The voice output data is data of driving advice output by a driving advice output unit 51 described later.

  The external output unit 33 includes, for example, a writable mass storage device such as an SSD (solid state drive). The external output unit 33 outputs the load management information input from the control unit 10 to a PC of an operation management company that manages the operation of the driver. The loading management information is imaging data in the luggage compartment of the vehicle detected by the loading status detection unit 40 described later, and information of driving advice output by the driving advice output unit 51 described later. As an output method, for example, a storage medium such as an SSD is removed from the loading management system 100 and connected to a PC. Alternatively, the data may be output between the PC and the communication unit via a network using a communication unit (not shown). The vehicle luggage compartment shows the inside of the truck bed.

  The operation input unit 34 includes a mechanical switch provided near the screen of the display output unit 31 and a touch panel switch provided on the screen of the display output unit 31. The driver can perform various operations using each switch of the operation input unit 34.

  A plurality of cameras 41 are respectively installed on the upper inner wall in the luggage compartment of the vehicle, on both inner walls in the front-rear direction with respect to the traveling direction, and on both inner walls in the left-right direction with respect to the traveling direction. As the camera 41, a stereo camera, which is a range image sensor, is used to grasp the three-dimensional size of the cargo in the luggage compartment. The cargo in the luggage compartment is packed in a box or the like. The plurality of installed cameras 41 respectively image the luggage compartment of the vehicle and generate image data. The generated imaging data is output to the loading status detection unit 40.

  The loading status detection unit 40 includes a measurement unit 42 and a load drop ratio detection unit 44.

  The measuring unit 42 measures the dimensions of the cargo existing in the cargo room based on the image data captured by the cameras 41 installed in plurals. The size of the load is indicated by its length, width and height. Then, the dimensions of the entire cargo existing in the cargo room are measured.

  The measuring unit 42 detects an edge of a load stacked vertically. The detection of the edge of the cargo is performed by a known edge detection process. The edge of the packed cargo is detected by the edge detection processing. The dimensions of the load are measured by the detected edges. By detecting the size of the load, for loads stacked in the vertical direction, the height from the upper surface of the load to the floor surface 64 (see FIG. 2) in the cargo compartment, the height from the lower surface of the load to the floor surface 64, Is measured.

  Information on the measured load is output to the load difference ratio detection unit 44. In addition, the measurement part 42 detects the size of the load assuming that the load exists in a place where the image cannot be captured even by using the plurality of cameras 41.

  The load drop ratio detection unit 44 detects the floor from the upper surface 61 of the first load 71 (see FIG. 2) in which the upper surface of the load is higher than the floor surface 64 in the load room among the two horizontally adjacent loads. The load drop ratio, which is the ratio of the load drop 63 to the height up to the surface 64, is detected. Note that the horizontally adjacent state includes a state where there is a horizontal gap between the first load 71 and the second load 72 as shown in FIG. When the first load 71 moves in the direction of the second load 72 due to acceleration or the like generated in the vehicle, if the gap is large enough to contact the second load 72, the first load 71 and the second load 72 are moved. Are horizontally adjacent states. In order to correctly determine this state, it is necessary to detect the dimension in the direction of the second load 72 among the horizontal dimensions of the first load 71. This dimension is measured by the measuring unit 42.

  Next, a method of detecting the load drop ratio will be described with reference to FIG. The load drop 63 is a difference in height between the upper surface 61 of the first load 71 and the upper surface 62 of the second load 72 that is lower than the first load 71 in two horizontally adjacent loads. It is.

  As shown in FIG. 2A, which is a view of the cargo compartment of the vehicle as viewed from the rear of the vehicle, the upper surface 61 of the cargo existing on the left side with respect to the traveling direction and the upper surface 62 of the cargo existing on the right side. Has occurred. As shown in FIG. 2B, which is a view of the cargo compartment of the vehicle viewed from the side of the vehicle, the vehicle not only detects the difference between the upper surfaces of two horizontally adjacent cargoes in the lateral direction of the vehicle, but also detects Also, the difference between the upper surfaces of two horizontally adjacent loads in the front-rear direction is detected.

  The load drop ratio is the load drop ratio with respect to the height from the upper surface 61 of the first load 71 whose upper surface is higher than the floor surface 64 to the floor surface 64 of the two horizontally adjacent loads. The ratio is 63. For example, as shown in FIG. 2A, when the height from the upper surface 61 to the floor surface 64 of the first load 71 is 1 m and the load drop 63 is 0.4 m, the load drop ratio is 40%. .

  As the value of the load difference ratio increases, the load difference 63 between the first load 71 and the second load 72 increases. Therefore, the higher the value of the load drop ratio, the lower the safety of the load when the load falls. The load drop ratio detection unit 44 outputs information on the detected load drop ratio to the control unit 10.

  In addition, the load difference ratio detection unit 44 determines whether the lower surface 73 of the first load 71 is higher than the upper surface 62 of the second load 72 in the first load 71 and the second load 72. Judge. As shown in FIG. 2A, when the lower surface 73 of the first load 71 does not exist at a position higher than the upper surface 62 of the second load 72, the first load 71 is separated from the second load 72 by the behavior of the vehicle. Even if an acceleration is generated in the direction of the load 72, the first load 71 does not move to the upper surface of the second load 72, and there is no risk of the load falling.

  On the other hand, when the lower surface 73 of the first load 71 is higher than the upper surface 62 of the second load 72, the behavior of the vehicle changes, and the first load 71 The cargo may move to the upper surface, and the cargo may fall due to the movement. The load drop ratio detection unit 44 outputs the determination result to the control unit 10.

  The reference range setting unit 52 determines whether to set a reference range based on the load drop ratio detected by the load drop ratio detection unit 44. The reference range is a range of the vehicle behavior that is a reference as to whether or not the fall suppression driving advice is output. The fall suppression driving advice is driving advice for suppressing the load from moving and falling due to the behavior of the vehicle.

  Further, the reference range setting unit 52 sets a reference range for the acceleration generated in the direction in which the second load exists with respect to the first load. An example of the reference range is shown below.

  If at least one of the load drop ratios of the first load 71 in the front-rear direction or the left-right direction of the vehicle is equal to or greater than 50%, it is determined that the vehicle cannot travel and it is determined that the vehicle cannot travel. If the reference range setting unit 52 determines that the vehicle cannot travel, the reference range setting unit 52 does not determine the reference range, and the driving advice output unit 51 outputs a fall suppression driving advice indicating that the vehicle must not travel.

  When the load drop ratio in the front-rear direction of the vehicle with respect to the first load 71 is lower than 50% and equal to or higher than 20%, it is determined that the vehicle is allowed to travel by performing the fall suppression driving advice, and it is determined that the vehicle is cautionary. If the load drop ratio in the front-rear direction of the vehicle with respect to the first load 71 is lower than 50% and higher than 20%, the position of the load in the luggage compartment changes due to sudden acceleration and sudden deceleration, and the load falls. As a result, the safety of the cargo may be reduced. Therefore, when the reference range setting unit 52 determines that caution is required for traveling, the reference range is determined as a reference range that can suppress a change in the position of the cargo in the luggage compartment due to sudden acceleration and sudden deceleration.

  For example, when the vehicle suddenly accelerates or decelerates, the load in the luggage compartment is accelerated in the front-rear direction of the vehicle. When the acceleration is applied in the front-rear direction of the vehicle, the position of the load may change in the front-rear direction of the vehicle. When the position of the load changes in the front-rear direction of the vehicle, the load may be dropped. Therefore, a range in which the absolute value of the acceleration in the front-rear direction of the vehicle is smaller than the first threshold is set as the reference range. The first threshold is, for example, 7 m / s ＾ 2. When the absolute value of the acceleration in the front-rear direction of the vehicle is equal to or larger than the first threshold, the driving advice output unit 51 outputs the driving advice for suppressing the fall.

  In addition, even if an acceleration in the rearward direction of the vehicle occurs in the first load 71 with respect to the first load 71, if there is no possibility that the load will fall in the rearward direction of the vehicle, the fall suppression driving advice is output. It is desirable not to do so. Therefore, the reference range setting unit 52 determines the direction of the acceleration applied to the vehicle from the acceleration detected by the vehicle behavior detection unit 20. When it is determined that the acceleration is in the same direction as the direction in which the load drop 63 exists with respect to the first load 71, and the absolute value of the acceleration is equal to or greater than the first threshold value, a fall suppression driving advice is output. The reference range is determined as follows. Note that the direction in which the load drop 63 exists and the acceleration in the same direction need not be exactly the same direction of acceleration, and a deviation may occur.

  If the load drop ratio of the first load 71 in the left-right direction of the vehicle is lower than 50% and equal to or higher than 20%, it is determined that traveling of the vehicle is permitted by performing the fall-prevention driving advice, and it is determined that the vehicle is traveling. If the load drop ratio of the vehicle in the left-right direction with respect to the first load 71 is lower than 50% and equal to or higher than 20%, the load falls due to a change in the position of the load in the luggage compartment due to right and left turns and left and right curves. This may reduce the safety of the cargo. Therefore, when the reference range setting unit 52 determines that the vehicle is to be cautioned for traveling, the reference range is determined as a reference range capable of suppressing a change in the position of the cargo in the luggage compartment due to a right / left turn or a left / right curve.

  For example, when the vehicle makes a right or left turn or turns a left or right curve, the load in the luggage compartment is subjected to acceleration in the left and right direction of the vehicle. When the acceleration is applied in the left-right direction of the vehicle, the position of the load may change in the left-right direction of the vehicle. When the position of the load changes in the left-right direction of the vehicle, the load may drop. Therefore, a range in which the absolute value of the acceleration in the left-right direction of the vehicle is smaller than the second threshold is set as the reference range.

  The second threshold is, for example, 4 m / s ＾ 2. When the absolute value of the acceleration in the left-right direction of the vehicle is equal to or larger than the second threshold, the driving advice output unit 51 outputs the drop-prevention driving advice.

  If the load drop ratio is lower than 8%, it is determined that traveling of the vehicle is permissible and traveling is permitted. When the load drop ratio is lower than 8%, the reference range setting unit 52 does not determine the reference range, and the driving advice output unit 51 does not perform the drop suppression driving advice. When the vehicle is allowed to travel, the cargo is ideally loaded in the cargo room, and the cargo falls due to sudden acceleration, sudden deceleration, right and left turns, left and right curves, and the safety of the cargo falls. Less likely to end up. Therefore, it is not necessary to give the driving control for the fall prevention and it is not necessary to determine the reference range of the behavior of the vehicle.

  That is, the load drop ratio in the left-right direction of the vehicle with respect to the first load 71 is determined to be cautionary, and the load difference ratio in the front-rear direction of the vehicle with respect to the first load 71 is determined to be travelable. In this case, the reference range setting unit 52 sets a reference range for the acceleration in the left-right direction of the vehicle, and does not set a reference range for the acceleration in the front-rear direction of the vehicle.

  On the other hand, the load drop ratio in the left-right direction of the vehicle with respect to the first load 71 is determined to be cautionary, and the load difference ratio in the front-rear direction of the vehicle with respect to the first load 71 is also determined to be cautionary. In this case, the reference range setting unit 52 sets a reference range for the acceleration of the vehicle in the left-right direction and a reference range for the acceleration of the vehicle in the front-rear direction.

  Furthermore, the load difference ratio in the left direction of the vehicle with respect to the first load 71 is determined to be traveling caution, and the load difference ratio in the right direction and the front-rear direction of the vehicle with respect to the first load 71 is determined to be traveling. If it is determined, the reference range setting unit 52 sets the reference range for the leftward acceleration of the vehicle, and does not set the reference range for the rightward and forward / backward acceleration of the vehicle.

  From this, the reference range setting unit 52 sets the reference range for acceleration in the same direction as the direction in which the load difference 63 having the load difference ratio detected by the load difference ratio detection unit 44 from the first load 71 exists. Set.

  Thus, the driver can be advised of the fall-prevention driving only for the behavior of the vehicle in which the cargo may fall due to the movement of the cargo in the luggage compartment.

  The driving advice output unit 51 determines that the lower surface 73 of the first load 71 is higher than the upper surface 62 of the second load 72 in the first load and the second load, and that the vehicle behavior detection unit When the behavior detected at 20 deviates from the reference range set by the reference range setting unit 52, a fall suppression driving advice that suppresses the movement of the load in the luggage compartment due to the behavior of the vehicle to drop the load is provided. Output. On the other hand, in the adjacent cargo, if the lower surface 73 of the first cargo 71 does not exist at a position higher than the upper surface 62 of the second cargo 72 or does not deviate from the reference range, a fall suppression driving advice is output. do not do.

  In the adjacent cargo, a state where the lower surface 73 of the first cargo 71 is higher than the upper surface 62 of the second cargo 72 is referred to as a state where the lower surface is high.

  The driving advice output unit 51 outputs the fall suppression driving advice to the audio output unit 32 as audio output data. The driving advice output unit 51 may output the drop suppression driving advice to the display output unit 31 as display output data.

  The driving advice output unit 51 outputs post-driving advice, which is post-driving advice, when the ignition switch of the vehicle is turned off. The post-advance advice is to provide the driver with loading management information, such as the status of the cargo in the luggage compartment, captured by the camera 41 and stored in the external output unit 33. The output posterior advice is notified to the driver of the vehicle via the audio output unit 32 or the display output unit 31.

(flowchart)
Hereinafter, the loading management process performed by the control unit 10 will be described with reference to the flowchart illustrated in FIG. The control unit 10 always repeats the loading management process while the ignition switch of the vehicle is ON.

  First, in step S1, the status of the cargo in the luggage compartment is captured by the camera 41, and the captured data is stored in the external output unit 33 as loading management information, and the process proceeds to step S2.

  In Step S2, it is determined whether or not at least one of the load drop ratios of the first load 71 in the front-rear direction or the left-right direction of the vehicle is in a state in which traveling is impossible. If it is determined that the vehicle cannot travel, the process proceeds to step S3. On the other hand, if it is determined that the vehicle is not in the state in which traveling is impossible, the process proceeds to step S6.

  In step S <b> 3, the lower load ratio detecting unit 44 detects that the lower surface 73 of the first load 71 is higher than the upper surface 62 of the second load 72 in the first load 71 and the second load 72. It is determined whether or not the lower surface, which is the state, is high. If it is determined that the lower surface is high, the process proceeds to step S4. On the other hand, when it is determined that the lower surface is not high, even if the behavior of the vehicle changes, the first load 71 does not move to the upper surface of the second load 72, and the load may drop. Since there is no such information, the process proceeds to step S5 without performing the fall suppression driving advice.

  In step S4, the driving advice output unit 51 outputs a drop-preventing driving advice that prompts the user to restart the load. Then, the notification is sent to the driver of the vehicle via the audio output unit 32 or the display output unit 31. After step S4, the process proceeds to step S5.

  In step S5, it is determined whether or not the ignition switch is ON. If the ignition switch is ON, the process proceeds to step S1. On the other hand, if the ignition switch is not ON, the process proceeds to step S11.

  In step S6, it is determined whether the load drop ratio in the front-rear direction or the left-right direction of the vehicle with respect to the first load 71 is in a cautionary state. When it is determined that at least one of the load drop ratios of the first load 71 in the front-rear direction or the left-right direction of the vehicle is in a cautionary state, the process proceeds to step S7.

  On the other hand, when it is determined that the load drop ratio in the front-rear direction or the left-right direction of the vehicle is not in the traveling caution state with respect to the first load 71, it is determined that the load drop ratio is in the travelable state, and Shift to S5. When it is determined that the vehicle is in a travelable state, the reference range in which the fall suppression driving advice is output is not determined, and the fall suppression driving advice is not performed.

  In step S7, the reference range setting unit 52 sets a reference range for acceleration in the same direction as the direction in which the load difference 63, which is the load difference ratio detected by the load difference ratio detection unit 44 from the first load 71, exists. Set. After step S7, the process proceeds to step S8.

  In step S8, the load drop ratio detecting section 44 determines whether or not the lower surface is high. If it is determined that the lower surface is high, the process proceeds to step S9. On the other hand, when it is determined that the lower surface is not high, even if the behavior of the vehicle changes, the first load 71 does not move to the upper surface of the second load 72, and the load may drop. Since there is no such information, the process proceeds to step S5 without performing the fall suppression driving advice.

  In step S9, it is determined whether the behavior of the vehicle is out of the reference range. If it is determined that it is not outside the reference range, the process proceeds to step S5. On the other hand, when it is determined that the behavior of the vehicle is out of the reference range, the process proceeds to step S10.

  In step S10, since the behavior of the vehicle is out of the reference range, the driving advice output unit 51 outputs the fall suppression driving advice, and proceeds to step S5. The outputted fall suppression driving advice is notified to the driver of the vehicle via the audio output unit 32 or the display output unit 31.

  In step S11, the driving advice output section 51 outputs post-driving advice, which is post-driving advice, and the flow ends. The output posterior advice is notified to the driver of the vehicle via the audio output unit 32 or the display output unit 31.

  As described above, in the present embodiment, it is possible to provide the driver with the fall suppression driving advice. A reference range of the vehicle behavior is set in order to determine whether to perform the fall suppression driving advice.

  However, for example, when the height of the upper surface 61 of the adjacent first cargo 71 and the height of the upper surface 62 of the second cargo 72 are the same, the first cargo 71 will not be moved unless the second cargo 72 moves. Depending on how the cargo is loaded, such as not falling in the direction of the second cargo 72, it may not be necessary to provide the fall-reducing driving advice.

  Thus, in the present embodiment, the load drop ratio is detected. This load drop ratio is the ratio of the load drop 63 to the height from the upper surface 61 to the floor surface 64 of the first load 71.

  When the load drop ratio is small, the first load 71 or another load existing below the first load 71 is supported by the second load 72 present next to the first load 71. Will be higher. Conversely, when the load drop ratio is large, the first load 71 or another load existing under the first load 71 has a small ratio supported by the second load 72. Become. There is a concern that the degree of the first load 71 swaying due to the horizontal acceleration caused by the behavior of the vehicle increases as the ratio of the load supported by the adjacent load decreases.

  Therefore, it is determined whether or not to set a reference range as a reference for determining whether or not the fall suppression driving advice is output based on the load drop ratio. The driving advice output unit 51 determines that the behavior of the vehicle is out of the reference range as one of the conditions for outputting the fall suppression driving advice.

  However, when the lower surface 73 of the first load 71 is not located higher than the upper surface 62 of the second load 72, the first load 71 does not move to the upper surface 62 of the second load 72, and Is unlikely to fall. Therefore, even if the behavior of the vehicle changes, the safety of the cargo is not easily reduced.

  Therefore, in addition to determining that the behavior of the vehicle is out of the reference range, the driving advice output unit 51 determines that the lower surface 73 of the first load 71 is located higher than the upper surface 62 of the second load 72. Also, a condition for outputting the fall suppression driving advice is provided, and the driving advice output unit outputs the fall suppression driving advice based on satisfying these two conditions. By performing the fall suppression driving advice, the driver can easily perform the driving operation such that the behavior of the vehicle is within the reference range. The movement of the cargo in the luggage compartment can be suppressed by the behavior of the vehicle within the reference range. By suppressing the movement of the cargo in the luggage compartment, it is possible to suppress the cargo from falling. This makes it difficult to lower the safety of the cargo. According to this configuration, the load management system can hardly lower the safety of the load.

(Other embodiments)
As described above, the preferred embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments, and can be implemented with various modifications as exemplified below. Not only the combination of the parts that clearly indicate that a combination is possible in each embodiment, but also the embodiments may be partially combined without being specified unless there is any particular problem with the combination. Is also possible.

(Modification 1)
In the first embodiment, the camera 41 is a stereo camera, which is a range image sensor, for grasping the three-dimensional size of the cargo in the luggage compartment, but is not limited to this. The distance detection may be performed by a single lens camera. The method of detecting the distance by the monocular lens camera is performed based on well-known image analysis. By attaching a color filter combining two colors to the lens opening, blurring and color shift corresponding to the distance to the subject are generated. By performing image analysis of the generated blur and color shift, the distance to the subject can be detected for each pixel.

(Modification 2)
In the first embodiment, the reference range setting unit 52 sets the reference range based on the load difference ratio detected by the load difference ratio detection unit 44. The reference range is set to an invariable value like the first threshold and the second threshold, but is not limited to this. For example, the reference range may be variable. Specifically, the reference range may be narrowed as the load difference ratio increases.

20: Vehicle behavior detection unit 40: Loading status detection unit 41: Camera 42: Measurement unit 44: Load difference ratio detection unit 51: Driving advice output unit 52: Reference range setting unit 63: Load difference 71: First load 72: First load 72: Second shipment

Claims (2)

A camera (41) for imaging a packaged cargo present in a luggage compartment of a vehicle,
A measuring unit (42) for measuring a height from an upper surface of the cargo imaged by the camera to a floor surface (64) of the cargo room and a height from a lower surface of the cargo to the floor surface;
When the height from the upper surface to the floor of the cargo compartment is measured for two loads adjacent to each other in the horizontal direction measured by the measurement unit, the load of the load of the two loads is measured. The load whose upper surface is higher than the floor is the first load (71), and the load whose upper surface is lower than the floor among the two loads is the first load (71). 2 (72), the upper surface of the second load (62) and the upper surface of the first load with respect to the height from the upper surface (61) of the first load to the floor surface. A load drop ratio detection unit (44) that detects a load drop ratio that is a ratio of the load drop (63) that is a height difference;
A vehicle behavior detector (20) for detecting the behavior of the vehicle;
A driving advice output unit (51) that outputs driving advice for prompting a driver to improve driving;
Based on the load drop ratio detected by the load drop ratio detection unit, the operation advice that is the driving advice that is the driving advice that suppresses the load from moving and the load in the luggage compartment due to the behavior of the vehicle. A reference range setting unit (52) for determining whether to set a reference range of the behavior of the vehicle, which is a reference for whether or not the vehicle is output.
The driving advice output unit is configured to determine that the lower surface (73) of the first cargo is located higher than the upper surface of the second cargo and that the behavior of the vehicle is outside the reference range. A load management system that outputs the fall suppression driving advice to a driver. The vehicle behavior detection unit detects acceleration generated in the front-rear and left-right directions of the vehicle,
The reference range setting unit sets the reference range for acceleration generated in a direction in which the second load exists with respect to the first load.
The load management system according to claim 1.

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