JP2009241662A - Work vehicle monitoring system and work vehicle monitoring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work vehicle monitoring system capable of easily setting the monitoring area to a plurality of work vehicles. <P>SOLUTION: The work vehicle monitoring system 1 comprises a transmission device 15, a communication unit 7, a monitoring area setting unit 12, and a determination unit 13. The transmission device 15 is mounted on each of a plurality of work vehicles 2 and transmits the position information of each work vehicle 2. The communication unit 7 receives the position information transmitted from the transmission device 15. The monitoring area setting unit 12 can collectively set the monitoring area for the plurality of work vehicles 2. The determination unit 13 determines based on the position information whether each of the plurality of work vehicles 2 is located within the monitoring area. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a work vehicle monitoring system and a work vehicle monitoring device.

Conventionally, a work vehicle monitoring system for remotely monitoring a work vehicle has been realized (see Patent Document 1). In this work vehicle monitoring system, a transmission device that transmits position information is provided in the work vehicle, and a monitoring device disposed in the management center receives the position information. In addition, the monitoring device sets a monitoring area for each work vehicle, and when the work vehicle moves out of the monitoring area, it notifies the occurrence of an abnormality.
JP 2007-204000 A

  However, in the conventional work vehicle monitoring system, when setting a monitoring area for a work vehicle, it is necessary to set one monitoring area for each work vehicle. On the other hand, a plurality of work vehicles are often arranged within one area. For example, a plurality of work vehicles used in the work site are arranged in a certain work site, or a plurality of work vehicles are arranged in a site of a company that is a user. In this case, in the conventional work vehicle monitoring system, even if the monitoring area set for each work vehicle is common, it is necessary to set one monitoring area for each work vehicle, which is complicated.

  The subject of this invention is providing the work vehicle monitoring system and work vehicle monitoring apparatus which can set a monitoring area easily with respect to several work vehicles.

  The work vehicle monitoring system according to the first invention includes a transmission device, a receiving unit, a monitoring area setting unit, and a determination unit. The transmission device is mounted on each of the plurality of work vehicles and transmits position information of the work vehicle. The receiving unit receives position information transmitted from the transmitting device. The monitoring area setting unit can collectively set the monitoring area for a plurality of work vehicles. The determination unit determines whether or not each of the plurality of work vehicles is located in the monitoring area based on the position information.

  In this work vehicle monitoring system, a monitoring area can be set in a batch for a plurality of work vehicles to be monitored. Thereby, a monitoring area can be easily set for a plurality of work vehicles.

  A work vehicle monitoring system according to a second aspect of the present invention is the work vehicle monitoring system of the first aspect, wherein the monitoring area setting unit obtains a plurality of work vehicles selected by an operator from position information. The monitoring area is set according to the distribution of.

  In this work vehicle monitoring system, distribution of a plurality of selected work vehicles is taken into consideration when setting a monitoring area. For this reason, it is possible to set a monitoring area suitable for the distribution of the selected plurality of work vehicles.

  A work vehicle monitoring system according to a third aspect is the work vehicle monitoring system according to the second aspect, wherein the monitoring area setting unit sets a common monitoring area so as to include all of the selected plurality of work vehicles.

  In this work vehicle monitoring system, a common monitoring area can be set collectively for a plurality of work vehicles.

  A work vehicle monitoring system according to a fourth invention is the work vehicle monitoring system according to the third invention, wherein the monitoring area setting unit indicates the barycentric coordinates and the first principal component direction in the distribution of the selected plurality of work vehicles. A first vector and a second vector indicating the second principal component direction are calculated, and a monitoring area is set based on the barycentric coordinates, the first vector, and the second vector.

  In this work vehicle monitoring system, a monitoring area suitable for the distribution of a plurality of work vehicles can be set.

  A work vehicle monitoring system according to a fifth aspect is the work vehicle monitoring system according to the second aspect, wherein the monitoring area setting unit classifies the selected plurality of work vehicles into a number of groups determined by input from an operator. And set a monitoring area for each group.

  In this work vehicle monitoring system, work vehicles can be divided into a plurality of groups, and a monitoring area can be collectively set for each group.

  A work vehicle monitoring system according to a sixth aspect of the present invention is the work vehicle monitoring system according to any one of the second to fifth aspects, wherein the monitoring area setting unit updates the setting of the monitoring area every predetermined period.

  In this work vehicle monitoring system, even if the work vehicle moves and the distribution is changed, a monitoring area suitable for the distribution of the work vehicle after the movement can be set.

  A work vehicle monitoring system according to a seventh aspect of the present invention is the work vehicle monitoring system of the sixth aspect, wherein the determination unit determines occurrence of an abnormality by a change in the monitoring area before and after the update when the setting of the monitoring area is updated. To do.

  In this work vehicle monitoring system, when the monitoring area is updated after the work vehicle is taken out of the monitoring area, the updated monitoring area changes greatly. The determination unit can determine that an abnormality has occurred when the change in the monitoring area is excessively large. Thereby, the occurrence of abnormality can be detected.

A work vehicle monitoring system according to an eighth aspect of the present invention is the work vehicle monitoring system according to any one of the second to seventh aspects, wherein the monitoring area setting unit is an unset vehicle that is a work vehicle in which no monitoring area is set. Is added to the existing monitoring area, the monitoring area is reset according to the distribution of the work vehicles set in the existing monitoring area and the unset vehicles.
In this work vehicle monitoring system, when a work vehicle is added to an existing monitoring area, a monitoring area suitable for the distribution of the work vehicle after the addition can be set. For this reason, it can respond easily to the addition of the work vehicle to the work site.

  A work vehicle monitoring system according to a ninth aspect is the work vehicle monitoring system according to the eighth aspect, wherein the monitoring area setting unit determines that an unset vehicle has entered an existing monitoring area based on the position information. If it has been done, the monitoring area is reset according to the distribution of the work vehicles set in the existing monitoring area and the unset vehicles.

  In this work vehicle monitoring system, when an unset vehicle enters an existing monitoring area, the monitoring area is automatically reset. For this reason, it can respond easily to the addition of the work vehicle to the work site.

  A work vehicle monitoring system according to a tenth aspect of the present invention is the work vehicle monitoring system of the first aspect, wherein the monitoring area setting unit monitors based on a reference position determined by an input from an operator and a distance from the reference position. Set the area.

  In this work vehicle monitoring system, the operator can manually set the position and size of the monitoring area.

  A work vehicle monitoring apparatus according to an eleventh invention includes a receiving unit, a monitoring area setting unit, and a determination unit. The receiving unit receives the position information of the work vehicle transmitted from the transmission device. The transmitting device is mounted on each of the plurality of work vehicles. The monitoring area setting unit can collectively set the monitoring area for a plurality of work vehicles. The determination unit determines whether or not each of the plurality of work vehicles is located in the monitoring area based on the position information.

  In this work vehicle monitoring apparatus, it is possible to collectively set a monitoring area for a plurality of work vehicles to be monitored. Thereby, a monitoring area can be easily set for a plurality of work vehicles.

  In the present invention, it is possible to set the monitoring area for a plurality of work vehicles at once. Thereby, a monitoring area can be easily set for a plurality of work vehicles.

<Configuration>
A work vehicle monitoring system 1 according to an embodiment of the present invention is shown in FIG. In this work vehicle monitoring system 1, a plurality of work vehicles 2 distributed and arranged in various regions can be monitored by the management server 3. The work vehicle monitoring system 1 includes a transmission device 15 and a management server 3.

  The transmission device 15 is provided in the work vehicle 2 and is a device that transmits position information of the work vehicle 2. The work vehicle 2 is, for example, a construction machine such as a bulldozer, a hydraulic excavator, or a wheel loader. The transmission device 15 includes a GPS sensor 4, a communication unit 5, and a control unit 6. The GPS sensor 4 detects position information of the work vehicle 2 based on information sent from the GPS satellite S1 via the antenna. The communication unit 5 can communicate with the communication satellite S <b> 2 via the antenna and transmits / receives information to / from the management server 3. The control unit 6 transmits the position information acquired from the GPS sensor 4 from the communication unit 5 and transmits it to the management server 3. In FIG. 1, only one work vehicle 2 is shown, but the other work vehicles 2 have the same configuration.

  The management server 3 can communicate with each work vehicle 2 via the communication satellite S2, the ground station S3, and the network N such as the Internet. Based on the position information received from each work vehicle 2, the management server 3 Monitor. The management server 3 includes a communication unit 7, an input unit 8, a control unit 9, a storage unit 10, and a display unit 11.

  The communication unit 7 is a device for communicating with an external device via the network N, and receives position information transmitted from the work vehicle 2.

  The input unit 8 includes a pointing device such as a mouse and an input device such as a keyboard, and is operated by an operator. The operator can input instruction information for setting a monitoring area described later by operating the input unit 8.

  The control unit 9 monitors the work vehicle 2 based on the position information received by the communication unit 7 and the instruction information input from the input unit 8. The control unit 9 includes a monitoring area setting unit 12 and a determination unit 13. The monitoring area setting unit 12 sets the monitoring area based on the position information and the instruction information. The monitoring area setting unit 12 can set monitoring areas for a plurality of work vehicles 2 in a lump. The determination unit 13 determines whether or not the plurality of work vehicles 2 are located in the set monitoring areas based on the position information of each work vehicle 2. The control unit 9 includes an arithmetic device such as a CPU and a memory such as a RAM and a ROM. The control unit 9 functions as the monitoring area setting unit 12 and the determination unit 13 by performing various processes according to the input signal. Specific processing contents by the control unit 9 will be described in detail later.

  The storage unit 10 stores position information and instruction information. The storage unit 10 stores monitoring area setting information set by the monitoring area setting unit 12.

  The display unit 11 displays an input screen for inputting instruction information by the input unit 8. Further, when the determination unit 13 determines that an abnormality has occurred, the display unit 11 displays a predetermined warning screen.

<Processing contents in the management server 3>
Hereinafter, the processing content in the management server 3 regarding the monitoring of the work vehicle 2 is demonstrated in detail. In the following description, the work vehicle 2 is simply referred to as “vehicle”.

[Manual setting of monitoring area]
The management server 3 can select manual setting or automatic setting of the monitoring area.

  When manual setting of the monitoring area is selected, the monitoring area is set according to the flowchart shown in FIG.

  First, in step S1, a vehicle is selected. Here, a plurality of vehicles for which a monitoring area is to be set are selected. In this case, as shown in FIG. 3A, a map showing the arrangement of vehicles is displayed on the display unit 11 based on the position information. The operator selects a desired vehicle from among the displayed vehicles. Further, as shown in FIG. 3B, a list of a plurality of vehicles may be displayed, and a desired vehicle may be selected from this list by the operator.

  In step S2, the center position (reference position) is selected. Here, the center position of the monitoring area is selected. In this case, the operator can select the center position by three selection methods as shown in FIG. First, in the first selection method, when the operator clicks a point on the map, the clicked point is set as the center position. In the second selection method, the center position is set by the operator inputting the latitude and longitude of the center position. In the third selection method, the distribution center of the target vehicle is set as the center position of the monitoring area. The vehicle distribution center is calculated by the following calculation formula.

[Latitude] = [Sum of latitude of target vehicles] / [Number of target vehicles]
[Longitude] = [Sum of longitude of target vehicles] / [Number of target vehicles]
In step S3, the shape of the monitoring area is selected. Here, as shown in FIG. 5, the operator selects the shape of the monitoring area from a rectangle and a circle.

  In step S4, the width of the monitoring area is selected. Here, when the rectangle is selected in step S3, the width of the monitoring area is selected on the input screen shown in FIG. If a circle is selected in step S3, the width of the monitoring area is selected on the input screen shown in FIG.

  First, on the input screen shown in FIG. 6, the operator can select the width of the monitoring area by three selection methods. First, in the first selection method, the operator inputs the width in the north-south direction and the width in the east-west direction of the monitoring area. In this case, as shown in FIG. 7A, the width D1 in the north-south direction and the width D2 in the east-west direction of the monitoring area are input. In the second selection method, the operator inputs a distance to be added to the distance from the center to the furthest vehicle in each of the east, west, north, and south directions. In this case, as shown in FIG. 7 (b), the operator can further determine the distances De, Dw, Dn, Ds to the vehicles on the east side, the west side, the north side, and the south side with respect to the center position. Each distance De2, Dw2, Dn2, Ds2 added to the north side and the south side is input. In the third selection method, the operator designates the upper left and lower right positions on the map. In this case, as shown in FIG. 8, the operator clicks a position designated as the upper left corner (northwest direction) of the monitoring area on the map (see mark f1 in FIG. 8). Subsequently, a position designated at the lower right corner (southeast direction) of the monitoring area is clicked on the map (see mark f2 in FIG. 8).

  In the input screen shown in FIG. 9, the operator can select the width of the monitoring area by three selection methods. First, in the first selection method, the operator inputs a radius from the center position. In the second selection method, the operator inputs an additional distance from the distance from the center position to the farthest vehicle. In the third selection method, the operator designates the width of the monitoring area on the map. Here, the operator clicks one point on the map (see mark f3 in FIG. 10). Thereby, the distance from the center position to the clicked point is set as the radius of the monitoring area.

  Next, in step S5, monitoring area setting processing is performed. Here, the monitoring area is set based on the instruction information input in steps S1 to S4 and the position information from the transmission device 15. For example, when a circular monitoring area is selected, a monitoring area A1 as shown in FIG. 11A is set. When a rectangular monitoring area is selected, a monitoring area A2 as shown in FIG. 11B is set.

[Monitoring area automatic setting processing]
When the automatic setting of the monitoring area is selected, the monitoring area is set according to the flowchart shown in FIG. Here, the monitoring area is calculated and set according to the vehicle distribution acquired from the position information.

  First, in step S11, a vehicle is selected. Here, similarly to step S1 described above, a plurality of vehicles to be set as monitoring areas are selected.

  In step S12, the center position is calculated. Here, the distribution center of the target vehicle is calculated and set as the center position of the monitoring area in the same manner as in the third selection method in step S2 described above.

  In step S13, the shape of the monitoring area is selected. Here, as shown in FIG. 13A, the operator selects a rectangle or an ellipse as the shape of the monitoring area.

  In step S14, the width of the monitoring area is selected. Here, the operator designates a distance to be added to the automatically set width of the monitoring area. As shown in FIG. 13B, the operator inputs distances to be added to the distance from the center position to the vehicle farthest from the long axis direction and the short axis direction.

  Next, in step S15, monitoring area setting processing is performed. Here, based on the instruction information input in steps S11 to S14 and the position information from the transmission device 15, a monitoring area including all the selected vehicles is set. Hereinafter, the monitoring area setting process will be described separately for the case where the rectangular monitoring area is selected in step S13 and the case where the elliptical monitoring area is selected.

  When a rectangular monitoring area is selected in step S13, as shown in FIG. 14, the barycentric coordinates G in the distribution of all target vehicles are calculated. Then, vectors indicating the first principal component and the second principal component are calculated by principal component analysis, and set as rectangular axes V1 and V2, respectively. Next, a perpendicular is drawn from the position of each vehicle to the first principal component axis V1, and the intersection with the first principal component axis V1 is defined as Hi (not shown). The longest distance from the center of gravity G to the intersection Hi is defined as D1. Further, a perpendicular line is drawn from the position of each vehicle to the second principal component axis V2, and the intersection with the second principal component axis V2 is defined as Ji (not shown). The longest distance from the center of gravity G to the intersection point Ji is defined as D2. Next, a rectangle whose length in the first principal component direction is D1 × 2 and whose length in the second principal component direction is D2 × 2 is created with the center of gravity G as the center. Furthermore, the monitoring area is expanded by the additional distance specified in step S14. In this case, if the added distance is E1 in the major axis (first principal component) direction and E2 in the minor axis (second principal component) direction, the length in the first principal component direction is as shown in FIG. A rectangle having (D1 + E1) × 2 and a length in the second principal component direction of (D2 + E2) × 2 is set as a monitoring area.

When an elliptical monitoring area is selected in step S13, the center-of-gravity coordinates G in the distribution of all target vehicles are calculated as shown in FIG. Then, vectors indicating the first principal component and the second principal component are calculated by principal component analysis, and are set as axes V1 and V2, respectively. In addition, each eigenvalue (λ1, λ2) is calculated from the center of gravity G on the first principal component axis V1.
Let C and C ′ be points that are separated by a distance. Then, the sum AiC + AiC ′ of the distances from the positions Ai to C and C ′ of each vehicle is calculated for all the target vehicles, and the maximum value is 2a. Also,
An ellipse having a focal point (C, C ′), a major axis length 2a, and a minor axis length 2b is created. Furthermore, the monitoring area is expanded by the additional distance specified in step S14. In this case, if the added distance is a ′ in the major axis (first principal component) direction and b ′ in the minor axis (second principal component) direction, as shown in FIG. 17, the focal position (C2, C2 ′). ), The length of the major axis is 2 (a + a ′), the length of the minor axis is 2 (b + b ′), and the length from the focal point to the center of gravity G is
The ellipse is set as the monitoring area.

[Automatic setting processing for multiple monitoring areas]
The management server 3 can also set a plurality of monitoring areas for a plurality of target vehicles. Here, the monitoring area is set as in the flowchart shown in FIG.

  First, in step S21, a vehicle is selected. Here, similarly to step S1 described above, a plurality of vehicles to be set as monitoring areas are selected.

  In step S22, the number of monitoring areas to be set is designated. Here, the operator inputs the number of monitoring areas set for a plurality of target vehicles.

Next, in step S23, the selected vehicle is divided into a designated number of groups. Here, it is assumed that N vehicles are divided into A groups, the position of each vehicle is Xi (i = 1 to N), and the distance between the vehicle Xi and the vehicle Xj is D (Xi, Xj). To do. First, in the initial state, it is assumed that one vehicle forms one group and is divided into N groups Ci (i = 1 to N). Next, a distance D (Ci, Cj) between the groups Ci and Cj is calculated, and two clusters having the closest distance are sequentially merged. This merging is repeated until all vehicles are merged into A groups. The distance between groups is as follows.
However, _{n i} is the number of vehicles included in the group Ci.

  In step S24, a monitoring area is set for each group. Here, the monitoring area for each group is calculated in the same manner as in the monitoring area automatic setting process. Then, as shown in FIG. 19, a plurality of monitoring areas are set.

[Monitoring area update processing]
In the management server 3, the automatically set monitoring area is updated every predetermined period, for example, once a day. Here, the monitoring area is reset and updated according to the flowchart shown in FIG.

  First, in step S31, the position information of all the vehicles for which the area to be updated is set as the monitoring area is acquired.

  Next, in step S32, the monitoring area is reset. Here, the monitoring area is recalculated and set based on the acquisition method of the center position set in the monitoring area to be updated, the shape of the monitoring area, the width of the monitoring area, and the position information of each vehicle. .

  This monitoring area update processing is performed for all the monitoring areas registered in the management server 3.

[Additional processing of vehicles to the monitoring area]
Moreover, in this management server 3, a vehicle can be added with respect to the monitoring area already set. Here, the monitoring area is reset according to the flowcharts shown in FIGS.

  In the vehicle addition process shown in FIG. 21, the vehicle and the monitoring area to be added by the operator are manually selected.

  Here, first, in step S41, the vehicle to be added is selected by the operator.

  In step S42, a monitoring area to which a vehicle is added is selected by the operator.

  Next, in step S43, the position information of the vehicle in which the selected area is set as the monitoring area and the position information of the newly added vehicle are acquired.

  In step S44, the monitoring area is recalculated and set based on the acquired position information. Here, the monitoring area is set in the same manner as the monitoring area automatic setting process described above.

  In addition, in the vehicle addition process illustrated in FIG. 22, when a vehicle in which a monitoring area is not set moves into the set monitoring area, the monitoring area is automatically reset.

  First, in step S51, position information of a vehicle for which a monitoring area is not set (hereinafter referred to as “unset vehicle”) is acquired.

  In step S52, it is determined whether an unset vehicle is in any existing monitoring area.

  If an unset vehicle is in the existing monitoring area, the monitoring area is reset by adding the unset vehicle to the vehicle set in the monitoring area in step S53. Here, the monitoring area is set in the same manner as the monitoring area automatic setting process described above.

  The process of the above step S51-step S53 is performed with respect to all the vehicles in which the monitoring area is not set.

[Abnormality judgment processing]
Next, the abnormality determination process performed based on the monitoring area set as described above and the position information of each vehicle will be described. Here, the abnormality determination performed based on the comparison between the monitoring area and the position information of each vehicle and the abnormality determination performed based on the change of the monitoring area before and after the update are performed.

  In the abnormality determination process shown in FIG. 23, the abnormality determination is performed by comparing the monitoring area with the position information of each vehicle.

  First, in step S61, vehicle position information is acquired.

  Next, in step S62, it is determined whether or not there is a vehicle outside the set monitoring area.

  If there is a vehicle outside the set monitoring area, it is considered that an abnormality has occurred, a warning screen is displayed in step S63, and the fact that the abnormality has occurred is recorded.

  The abnormality determination process in steps S61 to S63 is performed for all vehicles whose positions have been updated.

  In addition, in the abnormality determination process shown in FIG. 24, the occurrence of abnormality is determined based on the magnitude of change before and after the update in the monitoring area updated in the monitoring area update process described above.

  First, in step S71 and step S72, the monitoring area is updated.

  Next, in step S73, it is determined whether or not the new center position of the monitoring area is a predetermined distance X or more compared with the center position before the update.

  If the new center position of the monitoring area is more than the predetermined distance X compared to the center position before the update, it is considered that an abnormality has occurred, a warning screen is displayed in step S74, and an abnormality is detected. Is recorded.

  The abnormality determination process in steps S71 to S74 is performed for all the set monitoring areas.

<Features>
In this work vehicle monitoring system 1, a monitoring area can be set for a plurality of work vehicles 2 in a lump. Thereby, a monitoring area can be easily set for a plurality of work vehicles 2. In particular, the monitoring area suitable for the distribution of the work vehicle 2 can be set by the automatic setting process of the monitoring area and the automatic setting process of the plurality of monitoring areas. Moreover, even if the change of the arrangement of the work vehicle 2 or the addition of the work vehicle 2 is performed on the site by performing the update process of the monitoring area or the addition process of the work vehicle 2, the work vehicle 2 after the change is changed. A monitoring area suitable for the distribution can be set.

<Other embodiments>
In the above embodiment, a circular, elliptical, and rectangular monitoring area is set, but the shape of the monitoring area is not limited to this. For example, a complicated shape along the distribution of the work vehicle 2 may be used.

  In the above embodiment, in the monitoring area manual setting process, the center position of the monitoring area is designated as the reference position, but other positions may be used as the reference position.

In the above embodiment, when dividing N vehicles into A groups in the process of setting a plurality of monitoring areas, the following inter-group distances
However, the definition of the distance between groups is not limited to this. For example, the expression
May be used.

  In the above embodiment, the management server 3 includes the display unit 11 and the input unit 8. However, the display unit and the input unit 8 of the terminal device that can access the management server 3 are the display unit 11 and the input unit 8. May be used as

  The present invention has an effect that a monitoring area can be easily set for a plurality of work vehicles, and is useful as a work vehicle monitoring system and a work vehicle monitoring device.

Schematic which shows the structure of a work vehicle monitoring system. The flowchart which shows the manual setting process of a monitoring area. The figure which shows the input screen at the time of vehicle selection. The figure which shows the input screen of a center position. The figure which shows the input screen of the shape of a monitoring area. The figure which shows the input screen of the width | variety of a monitoring area. The figure which shows the parameter input as a width | variety of a monitoring area. The figure which shows the input screen of the width | variety of a monitoring area. The figure which shows the input screen of the width | variety of a monitoring area. The figure which shows the input screen of the width | variety of a monitoring area. The figure which shows an example of the monitoring area set. Flow chart showing monitoring area automatic setting processing The figure which shows the input screen of the shape of a monitoring area, and the input screen of the width of a monitoring area. The figure which shows the calculation method of the monitoring area based on distribution of a vehicle. The figure which shows the calculation method of the monitoring area based on distribution of a vehicle. The figure which shows the calculation method of the monitoring area based on distribution of a vehicle. The figure which shows the calculation method of the monitoring area based on distribution of a vehicle. The flowchart which shows the automatic setting process of a some monitoring area. The figure which shows an example of the some monitoring area to be set. The flowchart which shows the update process of a monitoring area. The flowchart which shows the addition process of the work vehicle to a monitoring area. The flowchart which shows the addition process of the work vehicle to a monitoring area. The flowchart which shows an abnormality determination process. The flowchart which shows an abnormality determination process.

Explanation of symbols

1 Work Vehicle Monitoring System 3 Management Server (Work Vehicle Monitoring Device)
7 Communication unit (receiver)
12 Monitoring Area Setting Unit 13 Determination Unit 15 Transmitting Device

Claims (11)

A transmission device mounted on each of the plurality of work vehicles and transmitting the position information of the work vehicle;
A receiving unit for receiving position information transmitted from the transmitting device;
A monitoring area setting unit capable of collectively setting a monitoring area for the plurality of work vehicles;
A determination unit that determines whether or not each of the plurality of work vehicles is located in the monitoring area based on the position information;
A work vehicle monitoring system comprising: The monitoring area setting unit sets the monitoring area according to a distribution of the work vehicles acquired from the position information for the plurality of work vehicles selected by an operator.
The work vehicle monitoring system according to claim 1. The monitoring area setting unit sets the common monitoring area so as to include all of the plurality of selected work vehicles;
The work vehicle monitoring system according to claim 2. The monitoring area setting unit calculates a barycentric coordinate in the distribution of the plurality of selected work vehicles, a first vector indicating a first principal component direction, and a second vector indicating a second principal component direction, Setting the monitoring area based on barycentric coordinates, the first vector, and the second vector;
The work vehicle monitoring system according to claim 3. The monitoring area setting unit classifies the selected plurality of work vehicles into a number of groups determined by an input from an operator, and sets the monitoring area for each group.
The work vehicle monitoring system according to claim 2. The monitoring area setting unit updates the setting of the monitoring area every predetermined period;
The work vehicle monitoring system according to any one of claims 2 to 5. When the setting of the monitoring area is updated, the determination unit determines the occurrence of an abnormality by a change in the monitoring area before and after the update.
The work vehicle monitoring system according to claim 6. The monitoring area setting unit, when an unset vehicle, which is a work vehicle in which the monitoring area is not set, is added to the existing monitoring area, the work vehicle set in the existing monitoring area And resetting the monitoring area according to the distribution of the vehicle and the unset vehicle,
The work vehicle monitoring system according to any one of claims 2 to 7. When the monitoring area setting unit determines that the unset vehicle has entered the existing monitoring area based on the position information, the work vehicle set in the existing monitoring area And resetting the monitoring area according to the distribution of the vehicle and the unset vehicle,
The work vehicle monitoring system according to claim 8. The monitoring area setting unit sets the monitoring area based on a reference position determined by an input from an operator and a distance from the reference position;
The work vehicle monitoring system according to claim 1. A receiving unit that receives position information of the work vehicle transmitted from a transmission device mounted on each of the plurality of work vehicles;
A monitoring area setting unit capable of collectively setting a monitoring area for the plurality of work vehicles;
A determination unit that determines whether or not each of the plurality of work vehicles is located in the monitoring area based on the position information;
A work vehicle monitoring device comprising: