JP7296551B2 - Projection system, projection apparatus and projection method - Google Patents

Description

The present invention relates to projection systems, projection apparatuses, and projection methods.

2. Description of the Related Art Conventionally, a projection device capable of projecting an image onto a screen or the like is known. As a technology related to the projection device, Patent Literature 1 discloses a method of displaying a design proposal object on the boundary wall surface of a room.

Japanese Patent Publication No. 2016-522905

However, with the above-described conventional technology, work cannot be efficiently performed when there are many work locations.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a projection system, a projection device, and a projection method that enable workers to work efficiently, shorten the construction period, and reduce the burden on the workers.

In order to achieve the above object, a projection system according to an aspect of the present invention includes a position recognition unit that recognizes the positions of workers who perform work at each of a plurality of work locations on a work site; Based on the design data, the position recognized by the position recognition unit, and the position information of the plurality of work locations, the target location, which is the work location where the worker travels the shortest distance, and the target location are projected. and a projection device for projecting the target drawing onto the target location.

Further, a projection device according to an aspect of the present invention includes a position recognition unit that recognizes positions of workers who perform work at each of a plurality of work locations in a work site; design data indicating the plurality of work locations; 3 is a drawing projected onto a target location, which is a work location at which the worker travels the shortest distance, and the target location, based on positions recognized by a position recognition unit and position information of the plurality of work locations. A data processing unit that determines a target drawing, and a projection unit that projects the target drawing onto the target location.

A projection method according to an aspect of the present invention includes a step of recognizing a position of a worker who performs work at each of a plurality of work locations in a work site; design data indicating the plurality of work locations; and position information of the plurality of work locations, determine a target location that is a work location that minimizes the movement distance of the worker, and a target drawing that is a drawing projected onto the target location. and a projection device projecting the target drawing onto the target location.

Further, one aspect of the present invention can be implemented as a program for causing a computer to execute the projection method. Alternatively, it can be implemented as a computer-readable non-temporary recording medium storing the program.

According to the projection device and the like of the present invention, workers can be made to work efficiently, shortening the construction period and reducing the burden on the workers.

FIG. 1 is a diagram for explaining an overview of a projection system according to an embodiment. FIG. 2 is an external view of an apparatus that constitutes the projection system according to the embodiment. FIG. 3 is a block diagram showing the functional configuration of the projection system according to the embodiment. FIG. 4 is a flow chart showing the operation of the projection system according to the embodiment. FIG. 5 is a diagram showing an example of the order of projection of drawings by the projection system according to the embodiment. FIG. 6 is a diagram showing how the posture of the projection device in the projection system according to the embodiment is changed. FIG. 7 is a diagram showing an example of the order of projection of drawings by the projection system according to Modification 1 of the embodiment. FIG. 8 is a flow chart showing the operation of the projection system according to Modification 2 of the embodiment. FIG. 9 is a flowchart showing the operation of the projection system according to Modification 3 of the embodiment. FIG. 10 is a block diagram showing a functional configuration of a projection device according to Modification 4 of the embodiment.

A projection system, a projection apparatus, and a projection method according to embodiments of the present invention will be described below in detail with reference to the drawings. It should be noted that each of the embodiments described below is a specific example of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement and connection of components, steps, order of steps, etc. shown in the following embodiments are examples and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements not described in independent claims will be described as optional constituent elements.

Each figure is a schematic diagram and is not necessarily strictly illustrated. Therefore, for example, scales and the like do not necessarily match in each drawing. Moreover, in each figure, the same code|symbol is attached|subjected about the substantially same structure, and the overlapping description is abbreviate|omitted or simplified.

(Embodiment)
[overview]
An outline of a projection system according to an embodiment will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a diagram showing an outline of a projection system according to this embodiment. FIG. 2 is an external view of an apparatus that constitutes the projection system according to this embodiment.

A projection system 10 according to the present embodiment includes a projection device 20 . As shown in FIG. 1, a projection device 20 is installed at a work site 100 within a building under construction. The projection device 20 projects the drawing 110 onto the structures that make up the work site 100 . A structure is specifically a floor, a wall, a pillar, a ceiling, or the like. The drawing 110 is, for example, a drawing projected onto the work location 101 on the work site 100 . The worker 120 can perform the work easily and accurately by performing the work according to the drawing 110 .

The work is, for example, marking work. For example, the projected drawing 110 is a line or figure of light that is projected at the position where the worker 120 should draw the marking line with the length as designed. The operator 120 can easily draw a marking line simply by tracing the line of light or figure shown in the drawing 110 . It is not essential that the line or figure of light is used as a guide for drawing the marking line. A line of light or a figure itself may be used as the marking line. Further, the work may not be marking work, but may be work of making holes, and is not particularly limited.

The work site 100 has a plurality of work locations where the worker 120 should work. For example, as shown in FIG. 1, work site 100 has three work locations 101 , 102 and 103 . The projection system 10 according to the present embodiment projects the drawing 110 onto each of the three work locations 101, 102 and 103 in an appropriate order, thereby allowing the worker 120 to work efficiently.

[System configuration]
Next, a specific functional configuration of the projection system 10 according to this embodiment will be described using FIG. FIG. 3 is a block diagram showing the functional configuration of the projection system according to this embodiment. As shown in FIGS. 2 and 3, the projection system 10 includes a projection device 20, a data processing device 30, and a terminal device 40. FIG.

[Projection device]
The projection device 20 is mounted on a tripod and installed on the floor of the work site 100, for example, as shown in FIGS. Alternatively, projection device 20 may be mounted on the wall or ceiling of worksite 100 . As shown in FIG. 3, the projection device 20 includes a communication unit 21, a distance measurement unit 22, a projection unit 23, a recognition unit 24, a control unit 25, a storage unit 26, and a drive unit 27. .

The communication unit 21 is a communication interface for the projection device 20 to communicate with the data processing device 30 and the terminal device 40 . The communication unit 21 performs wireless communication with each of the data processing device 30 and the terminal device 40, but may also perform wired communication. The standard of communication performed by the communication unit 21 is not particularly limited.

The distance measuring unit 22 measures the distance from the projection device 20 to the structures forming the work site 100 . The rangefinder 22 is, for example, a range image sensor such as a TOF (Time Of Flight) sensor. A distance image sensor generates a distance image as a result of distance measurement. Each pixel value of a plurality of pixels forming the distance image indicates the distance from the distance measurement section 22 . Note that the distance measuring unit 22 may be another distance measuring sensor such as a distance measuring sensor using a phase difference detection method or a distance measuring sensor using a triangular distance measuring method. As shown in FIG. 3, the distance measurement unit 22 includes a distance measurement light source 22a and a detection unit 22b.

The ranging light source 22a is a light source that emits light toward a structure. The ranging light source 22a is, for example, a light-emitting element that emits infrared light. Alternatively, the distance measuring light source 22a may be a light emitting element that emits visible light. Note that the light source 22a for distance measurement does not need to be separate from the light source 23a of the projection unit 23, and the light source 23a of the projection unit 23 may be used as the light source 22a for distance measurement. That is, the distance measurement unit 22 may not have the distance measurement light source 22a, and may be a sensor having only the detection unit 22b.

The detection unit 22b is a light receiving element that detects the reflected light from the structure of the light emitted from the distance measuring light source 22a. The detection unit 22b is, for example, an image sensor configured by a photodiode array.

Projection unit 23 is a projection module for projecting drawing 110 onto a projection plane. The projection unit 23 includes a light source 23a and a scanning unit 23b. Although not shown, the projection unit 23 may include optical components such as lenses and mirrors.

The light source 23a is, for example, a semiconductor laser element that emits visible light. Alternatively, the light source 23a may be an LED (Light Emitting Diode). The light source 23a may have a configuration capable of changing the emission color. For example, the light source 23a may include a plurality of light emitting elements with different emission colors. The plurality of light emitting elements includes, for example, a blue light emitting element, a green light emitting element and a red light emitting element.

The scanning unit 23b scans the structure with the light emitted from the light source 23a. The scanning unit 23b is, for example, a MEMS (Micro Electro Mechanical Systems) mirror, a galvanometer scanner, or the like.

In the present embodiment, the projection unit 23 projects a target drawing, which is a drawing to be projected onto a target location, which is a work location determined by the data processing device 30, out of the plurality of work locations 101, 102, and 103. project the For example, in the example shown in FIG. 1 , the projection unit 23 projects a drawing 110 onto the work location 101 .

Also, the angle of view 111 that can be projected by the projection unit 23 is limited. For example, when the projection device 20 is installed on a horizontal plane, the angle of view 111 is approximately 40° in the horizontal direction and approximately 20° in the vertical direction. Therefore, in the example shown in FIG. 1 , the drawing 110 can be projected onto the work locations 101 and 102 , but the drawing 110 cannot be projected onto the work location 103 . In order to project the drawing 110 onto the work location 103, the orientation of the projection device 20 must be changed automatically or manually. In the present embodiment, the orientation of the projection device 20 is changed by the driving section 27, so that the projection direction and the projectable range of the projection section 23 are changed.

The recognition unit 24 is an example of a position recognition unit that recognizes the position of the worker 120 . The recognition unit 24 includes a camera 24a and a receiver 24b.

The camera 24 a photographs the work site 100 . Camera 24a includes an image sensor that detects infrared or visible light. The camera 24a captures an image of a range including not only the worker 120 but also a plurality of work locations 101, 102 and 103, for example. The position of the worker 120 in the image can be recognized by performing contour extraction processing or the like on the image captured by the camera 24a. The recognition unit 24 recognizes the position of the worker 120 on the work site 100 by comparing the photographed image and the design data.

The receiver 24b receives a radio signal transmitted from the terminal device 40 possessed by the worker 120 . The wireless signal is, for example, a beacon signal transmitted from the terminal device 40 using a wireless LAN (Local Area Network), Bluetooth (registered trademark), or infrared rays. Alternatively, the radio signal may be a radio signal including ID information transmitted from an RFID (Radio Frequency Identifier) tag of the terminal device 40 .

Note that the camera 24 a does not need to be separate from the detection unit 22 b of the distance measurement unit 22 , and the detection unit 22 b of the distance measurement unit 22 may be used as the camera 24 a of the recognition unit 24 . Moreover, the receiver 24 b does not need to be separate from the communication unit 21 , and the communication unit 21 may be used as the receiver 24 b of the recognition unit 24 .

Also, the recognition unit 24 may not include one of the camera 24a and the receiver 24b. When the recognition unit 24 includes the camera 24a, it is possible to recognize whether or not the worker 120 actually performed the work correctly at each work location. When the recognition unit 24 includes the receiver 24b, even when the worker 120 is out of the imaging range of the camera 24a and when the worker 120 is not captured in the image because the work site 100 is dark, the work can be performed. The location of the person 120 can be recognized.

Also, the wireless signal may be a signal using visible light instead of a signal using radio waves. For example, the communication unit 41 of the terminal device 40 may be a light emitting unit that performs visible light communication, and the recognition unit 24 may be a visible light receiver. The recognition unit 24 may recognize the position of the terminal device 40 by acquiring ID information included in visible light.

The control unit 25 is a control device that controls the distance measurement unit 22, the projection unit 23, the recognition unit 24, and the driving unit 27 in order to project the drawing 110 onto the projection surface. The control unit 25 is realized by, for example, an LSI (Large Scale Integration), which is an integrated circuit (IC). Note that the integrated circuit is not limited to an LSI, and may be realized by a dedicated circuit or a general-purpose processor. For example, the controller 25 may be realized by a microcomputer. Also, the control unit 25 may use a programmable FPGA (Field Programmable Gate Array) or a reconfigurable processor capable of reconfiguring connections and settings of circuit cells inside the LSI.

The storage unit 26 is a storage device that stores a control program that is executed by the control unit 25 and that is for projecting the drawing 110 . The storage unit 26 is, for example, a non-volatile memory and is realized by a semiconductor memory or the like.

The drive unit 27 is a drive mechanism for changing the attitude of the projection device 20 . The drive unit 27 changes the direction in which projection is possible by changing the posture of the projection device 20 . For example, the drive unit 27 can change the posture of the projection device 20 in each of pan (horizontal direction), tilt (vertical direction), and roll (rotational direction). The drive unit 27 is implemented by, for example, a stepping motor.

In this embodiment, the order of projecting the drawings onto each of the plurality of work locations is determined. For example, in the example shown in FIG. 1, it is assumed that drawings are projected in this order onto a work location 102 (first work location) and a work location 103 (second work location). In this case, if the work location 103 is located outside the range of the angle of view 111 that can be projected by the projection device 20, the drive unit 27 adjusts the angle of view of the work location 103 after the work at the work location 102 is completed. The posture of the projection device 20 is changed so as to enter the range 111 . Accordingly, even if the worker 120 does not change the posture of the projection device 20 , the posture is automatically changed, and the drawing 110 is projected onto the next work location 103 .

The end of the work is determined by the control unit 25 based on a signal transmitted from the terminal device 40 operated by the worker 120, for example. Alternatively, the control unit 25 may determine the end of the work based on the image captured by the camera 24a of the recognition unit 24. FIG.

The drive section 27 is controlled by the control section 25 . Based on the current attitude of the projection device 20 and the position of the next work location 103, the control unit 25 adjusts the direction and amount of movement of the attitude of the projection device 20 so that the work location 103 is within the range of the angle of view 111. to decide. The control unit 25 controls the driving unit 27 with the determined movement direction and movement amount, so that the driving unit 27 changes the attitude of the projection device 20 . Note that when there is one or more work locations where work is performed after the work location 103, the control unit 25 controls a plurality of work locations including the work location 103 and one or more work locations continuing from the work location 103 in the work order. The movement direction and the movement amount may be determined so that the work location of is within the range of the angle of view 111 . As a result, a plurality of work locations can be placed within the range of the angle of view 111 by changing the posture once, so the number of times of changing the posture can be reduced.

[Data processing device]
Next, the data processing device 30 will be described. The data processing device 30 is an information processing device that determines a work location where a drawing is to be projected and a target drawing to be projected onto the work location. The data processing device 30 is, for example, computer equipment. The data processing device 30 includes a communication unit 31, a data processing unit 32, a control unit 33, and a storage unit 34, as shown in FIG.

The communication unit 31 is a communication interface for the data processing device 30 to communicate with the projection device 20 and the terminal device 40 . The communication unit 31 performs wireless communication with each of the projection device 20 and the terminal device 40, but may also perform wired communication. A communication standard for communication performed by the communication unit 31 is not particularly limited.

The data processing unit 32 performs processing for determining the order of projection of the drawing 110 . The data processing unit 32 is, for example, a microcomputer or processor. Specifically, based on the design data, the position recognized by the recognition unit 24, and the positional information of a plurality of work locations, the data processing unit 32 determines the location where the worker 120 moves the shortest. A target location and a target drawing, which is a drawing projected onto the target location, are determined.

Design data is data indicating a plurality of work locations. Specifically, the design data is three-dimensional data indicating the size and shape of the work site 100 . For example, the design data is three-dimensional CAD (Computer Aided Design) data. The design data also includes two-dimensional data indicating the layout of the work site 100 and two-dimensional data indicating a plurality of work locations. In design data, each of a plurality of work locations is associated with a drawing to be projected. By determining the work location as the target location, the target drawing projected onto the target location is determined by referring to the design data.

The data processing unit 32 , for example, associates the design data with the actual work site 100 . The actual work site 100 is indicated by, for example, spatial data obtained by measuring distances to surrounding structures after the projection device 20 is installed at the work site 100 . By performing the correspondence, the installation position and orientation (orientation) of the projection device 20 on the design data are specified. A user such as the worker 120 or a work manager may input the position of the installed projection device 20 on the design data. In other words, the projection device 20 does not need to measure the working site 100 .

The data processing unit 32 identifies the position of the worker 120 obtained by the recognition unit 24 on the design data based on the correspondence relationship between the design data and the actual work site 100 . Based on the positional relationship between the position of the worker 120 and the plurality of work locations, the data processing unit 32 determines the work location where the worker 120 moves the shortest as the target location. For example, the data processing unit 32 calculates the movement distance from the position of the worker 120 to each of the plurality of work locations, and calculates the work location with the shortest calculated movement distance as the target location. If an obstacle such as a pillar or wall exists between the position of the worker 120 and the work site, the movement distance is the shortest distance for avoiding the obstacle. For example, the data processing unit 32 calculates the linear distance from the position of the worker 120 to the obstacle, the linear distance from the obstacle to the work site, and the length along the edge of the obstacle required to go around the obstacle. A total is calculated as the distance from the position of the worker 120 to the work location. Note that the method of calculating the movement distance is not particularly limited.

The control unit 33 is a control device that controls the communication unit 31, the data processing unit 32, and the storage unit 34 in order to determine the target location and target drawing. The controller 33 is implemented by, for example, an LSI, which is an integrated circuit. Note that the integrated circuit is not limited to an LSI, and may be realized by a dedicated circuit or a general-purpose processor. For example, the controller 33 may be realized by a microcomputer. Also, the control unit 33 may use a programmable FPGA or a reconfigurable processor capable of reconfiguring connections and settings of circuit cells inside the LSI.

The storage unit 34 is a storage device that stores a control program for determining target locations and target drawings, which is executed by the data processing unit 32 and the control unit 33 . The storage unit 34 is, for example, a non-volatile memory and is realized by a semiconductor memory or the like. The storage unit 34 further stores design data and drawing data indicating drawings to be projected.

[Terminal device]
Next, the terminal device 40 will be described. The terminal device 40 is a device used for recognizing the position of the worker 120 . The terminal device 40 also functions as a remote controller for the operator 120 to remotely operate the projection device 20 . For example, the terminal device 40 is a dedicated remote controller for the projection device 20 . Alternatively, the terminal device 40 may be a mobile terminal such as a smart phone or a tablet terminal in which a dedicated application program is installed. As shown in FIG. 3 , the terminal device 40 includes a communication section 41 , an operation reception section 42 , a display section 43 , a control section 44 and a storage section 45 .

The communication unit 41 is a communication interface for the terminal device 40 to communicate with the projection device 20 and the data processing device 30 . The communication unit 41 performs wireless communication with each of the projection device 20 and the data processing device 30, but may also perform wired communication. A communication standard for communication performed by the communication unit 41 is not particularly limited.

Moreover, the communication part 41 may transmit a beacon signal periodically, for example. A beacon signal is used to recognize the position of the worker 120 . Alternatively, the communication unit 41 may include an RFID tag and may transmit unique identification information to the terminal device 40 .

The operation accepting unit 42 is a user interface device that accepts operations by the operator 120 . The operation reception unit 42 is implemented by, for example, one or more physical buttons, but may be a touch panel or the like.

The display unit 43 displays an image showing the operation status of the projection device 20 and the like. The display unit 43 is, for example, a liquid crystal display panel or an organic EL (Electro Luminescence) display panel.

The control unit 44 is a control device that controls the communication unit 41 , the operation reception unit 42 , the display unit 43 and the storage unit 45 . The control unit 44 is implemented by an LSI, which is an integrated circuit. Note that the integrated circuit is not limited to an LSI, and may be realized by a dedicated circuit or a general-purpose processor. For example, the controller 44 may be realized by a microcomputer. Also, the control unit 44 may use a programmable FPGA or a reconfigurable processor capable of reconfiguring connections and settings of circuit cells inside the LSI.

Specifically, the control unit 44 causes the communication unit 41 to transmit a signal for operating the projection device 20 according to the operation received by the operation reception unit 42 to the projection device 20 . For example, the control unit 44 causes the communication unit 41 to transmit an end signal indicating the end of work to the projection device 20 when the operation receiving unit 42 receives an operation to receive an instruction to end work from the worker 120 .

The storage unit 45 is a storage device in which control programs executed by the control unit 44 are stored. The storage unit 45 is, for example, a non-volatile memory and is realized by a semiconductor memory or the like. The storage unit 45 may store identification information unique to the terminal device 40 .

[motion]
Next, operations of the projection system 10 according to the present embodiment will be described with reference to FIGS. 4 to 6. FIG.

FIG. 4 is a flow chart showing the operation of the projection system 10 according to this embodiment. As shown in FIG. 4, first, the projection device 20 is installed (S10). For example, the worker 120 installs the projection device 20 on the floor of the work site 100 or the like. After the projection device 20 is installed, the data processing device 30 associates the actual work site 100 with the design data.

Next, the recognition unit 24 of the projection device 20 recognizes the position of the worker 120 (S11). For example, the camera 24 a of the recognition unit 24 captures an image of the worker 120 to recognize the position of the worker 120 . The recognized position is transmitted to the data processing section 32 of the data processing device 30 via the communication section 21 and the communication section 31 .

Next, the data processing unit 32 collates the recognized position of the worker 120 with the design data, and determines the work place where the moving distance of the worker 120 is the shortest as the target place (S12). Specifically, the data processing unit 32 identifies the recognized position of the worker 120 on the design data. The data processing unit 32 calculates the movement distance from the position of the worker 120 to each of the plurality of work locations, and determines the work location with the shortest calculated movement distance as the target location. The data processing unit 32 further determines a target drawing, which is a drawing to be projected onto the determined target location. For example, the data processing unit 32 determines the target drawing by referring to the correspondence information between the work location and the drawing. The determined target location and target drawing are transmitted to the control unit 25 of the projection device 20 via the communication unit 21 and the communication unit 31 .

Next, the control unit 25 determines whether or not the target location is within the projection angle of view 111 (S13). If the target location is not within the angle of view 111 of projection (No in S13), the control unit 25 controls the drive unit 27 to change the posture of the projection device 20 (S14). As a result, the target portion is within the angle of view 111 of projection by the projection device 20, and the drawing 110 can be projected. If the target location is within the angle of view 111 of projection (Yes in S13), the driving unit 27 maintains the posture of the projection device 20 without changing it.

Next, the projection unit 23 of the projection device 20 projects the corresponding drawing onto the determined target location, which is the work location (S15). The operator 120 performs work such as marking work based on the displayed drawing 110 . After finishing the work, the worker 120 operates the terminal device 40 to give an instruction to finish the work. The drawing 110 continues to be projected on the work location until the end of the work is instructed (No in S16). After the end of the work is instructed (Yes in S16), if there is a next work location (Yes in S17), the process returns to step S11, and the recognition unit 24 recognizes the position of the worker 120. FIG. After that, the processes of steps S11 to S17 described above are repeated until the work at all work locations is completed (No in S17).

A specific example in which the above-described operation is applied at the work site 100 shown in FIG. 1 will be described below with reference to FIGS. 5 and 6. FIG.

FIG. 5 is a diagram showing an example of the projection order of the drawing 110 by the projection system 10 according to this embodiment. FIG. 6 is a diagram showing how the posture of the projection device 20 in the projection system 10 according to this embodiment is changed.

In the example shown in FIG. 5(a), the movement distance from the position of the worker 120 to each of the three work locations 101, 102 and 103 is calculated. Since the work location 101 is positioned closest to the worker 120 , the work location 101 is determined as the target location, and the drawing 110 is projected onto the work location 101 . Therefore, the worker 120 checks the drawing 110 and performs the work at the work location 101 .

After completing the work at the work location 101 , the worker 120 operates the terminal device 40 to input an instruction to end the work. As a result, the position of the worker 120 is recognized by the recognition unit 24, and the work place where the moving distance from the recognized position is the shortest is determined as the target place. For example, in (a) of FIG. 5 , the moving route with the shortest moving distance is indicated by a dashed arrow. Since the work location 102 is selected as the target location, the drawing 110 is projected onto the work location 102 as shown in FIG. 5(b).

After the work at the work location 102 is completed, the work location 103 is determined as the target location. At this time, as shown in (a) of FIG. 6 , the work location 103 is positioned outside the range of the angle of view 111 of projection by the projection device 20 . Therefore, as shown in (b) of FIG. 6 , the work location 103 is included within the range of the angle of view 111 by changing the attitude of the projection device 20 by the driving unit 27 . Then, as shown in FIG. 5C, the drawing 110 is displayed at the work place 103, so that the worker 120 can work at the work place 103. FIG.

As described above, in the present embodiment, the position of the worker 120 is recognized and the target location and target drawing are determined each time the work at the work location is completed. As a result, the work location closest to the position at which the worker 120 finished the work is determined as the target location, so that the worker 120 can move efficiently.

It is assumed that the worker 120 moves to a position different from the work place 101 after finishing the work at the work place 101 . For example, the worker 120 may leave the work site 101 to change work tools, take a break, or the like. In this case, since the post-movement position is recognized by instructing the end of the work at the post-movement position of the worker 120, the work location with the shortest movement distance from the post-movement position is determined as the target location. be. For example, when the worker 120 finishes the work at the work place 101, moves near the projection device 20, and then gives an instruction to finish the work, the work place 103 is selected as the target place, and the work place 103 is selected as the target place. The drawing 110 is projected onto the . In this case, the drawings are displayed in order of the work location 101, the work location 103, and the work location 102. FIG.

[Effects, etc.]
As described above, the projection system 10 according to the present embodiment includes the recognition unit 24 that recognizes the position of the worker 120 who performs work at each of a plurality of work locations in the work site 100, and a design system that indicates the plurality of work locations. Based on the data, the position recognized by the recognition unit 24, and the position information of a plurality of work locations, a target location, which is a work location where the movement distance of the worker 120 is the shortest, and a drawing projected on the target location. It comprises a data processing unit 32 for determining a certain target drawing, and a projection device 20 for projecting the target drawing onto a target location.

As a result, the drawing is projected to the work location where the moving distance of the worker 120 is the shortest. Since the movement distance is the shortest, the worker 120 can be made to work efficiently, and the construction period can be shortened and the burden on the worker 120 can be reduced.

Further, for example, the projection system 10 further includes an operation reception unit 42 that receives an instruction to end the work from the operator 120 . The recognition unit 24 recognizes the position of the worker 120 after the operation reception unit 42 receives the instruction. The data processing unit 32 determines a target location and a target drawing each time the recognition unit 24 recognizes the position of the worker 120 .

As a result, the drawing 110 is projected to the work place where the worker 120 moves the shortest every time the work at the work place is completed, so the worker 120 can confirm the place where the drawing 110 is projected. to move and do the work. In this manner, the worker 120 can efficiently perform work at a plurality of work locations.

In addition, for example, the projection device 20 further has a driving section 27 that changes the attitude of the projection device 20 . When the driving unit 27 projects a drawing onto a first work location and a second work location included in a plurality of work locations in this order, the second work location can be projected by the projection device 20. If it is located outside the range of the angle of view 111, the posture of the projection device 20 is changed so that the second work site is within the range of the angle of view 111 after the work at the first work site is completed.

This eliminates the need for the worker 120 to change the posture of the projection device 20, so the burden on the worker 120 can be reduced.

Also, for example, the recognition unit 24 includes a camera 24 a that captures the work site 100 .

Thereby, the position of the worker 120 can be easily and accurately recognized by the camera. In addition, by photographing not only the worker 120 but also the work location 101 with the camera, it is possible to detect whether or not the marking work has actually been performed. Therefore, it is possible to check the progress of the work, and to suppress the omission of the work.

Further, for example, the recognition unit 24 includes a receiver 24b that receives radio signals transmitted from the terminal device 40 possessed by the worker 120 .

As a result, the position of worker 120 can be easily and accurately recognized even when worker 120 cannot be photographed by a camera, such as when work site 100 is dark.

Further, for example, the projection method according to the present embodiment includes a step of recognizing the position of worker 120 who performs work at each of a plurality of work locations on work site 100, design data indicating the plurality of work locations, Based on the position of the worker 120 and the positional information of a plurality of work locations, the target location, which is the work location where the movement distance of the worker 120 is the shortest, and the target drawing, which is the drawing projected onto the target location, are determined. and projecting the target drawing onto the target location by the projection device 20 .

According to these, since the drawing is projected to the work place where the moving distance of the worker 120 is the shortest, the worker 120 can move to the work place where the drawing is projected and perform the work. Since the movement distance is the shortest, the worker 120 can be made to work efficiently, and the construction period can be shortened and the burden on the worker 120 can be reduced.

Also, for example, the projection method further includes a step of receiving an instruction to end the work from the worker 120 . In the recognizing step, the position of worker 120 is recognized after the instruction is received. In the determining step, the target location and target drawing are determined each time the position of the worker 120 is recognized.

As a result, the drawing 110 is projected to the work place where the worker 120 moves the shortest every time the work at the work place is completed, so the worker 120 can confirm the place where the drawing 110 is projected. to move and do the work. In this manner, the worker 120 can efficiently perform work at a plurality of work locations.

Also, for example, the projection device 20 has a drive unit 27 that changes the posture of the projection device 20 . In the projection method, the second work location can be projected by the projection device 20 when the drawing is projected in this order on the first work location and the second work location included in the plurality of work locations. If the projection device 20 is located outside the range of the angle of view 111, after the work at the first work place is completed, the posture of the projection device 20 is adjusted so that the second work place is within the range of the angle of view 111. 27 includes the step of modifying.

This eliminates the need for the worker 120 to change the posture of the projection device 20, so the burden on the worker 120 can be reduced.

(Modification)
Next, a modification of the above embodiment will be described. In the following, differences from the embodiment will be mainly described, and descriptions of common points will be omitted or simplified.

[Modification 1]
For example, the projection device 20 of the projection system 10 may project a number representing the order of work in the vicinity of the target location where the drawing 110 is projected. FIG. 7 is a diagram showing an example of the projection order of the drawing 110 by the projection system 10 according to this modification. As shown in FIGS. 7A to 7C, the projection device 20 projects the drawings 110 in order of the work location 101, the work location 102, and the work location 103. FIG. This order is determined so that the distance traveled by worker 120 is the shortest, as in the above-described embodiment.

At this time, as shown in FIGS. 7A to 7C, the projection device 20 projects a drawing 110 to be projected and a number 112 representing the order of work. The work order corresponds to the projection order. The number 112 is, for example, a number surrounded by a circle, but it may be a number surrounded by a square, or may be a single number. Numerals are not limited to Arabic numerals and may be Roman numerals or Chinese numerals. Also, the number 112 may not be a number, but may be a letter that indirectly indicates the order such as alphabetical order, alphabetical order, or alphabetic order.

The projection position of number 112 may be near the drawing 110 . Number 112 is projected so that it does not overlap drawing 110 . For example, the distance between the number 112 and the drawing 110 may range from several centimeters to several tens of centimeters or less.

As described above, in the projection system 10 according to this modified example, for example, the projection device 20 further projects the number 112 representing the work order near the target location. Further, for example, in the projection method according to this modified example, for example, in the step of projecting, a number 112 representing the order of work is projected in the vicinity of the target location.

As a result, the worker 120 can always check the work order, so that the work can be performed efficiently.

[Modification 2]
Further, for example, the data processing unit 32 may determine the order in which each of the plurality of work locations is determined as the target location. Specifically, when the position of the worker 120 is recognized, the data processing unit 32 may determine the work order of all work locations where the worker 120 works based on the position. The projection device 20 projects the target drawing onto the target location in the order determined by the data processing unit 32 .

FIG. 8 is a flow chart showing the operation of the projection system 10 according to this modification. As shown in FIG. 8, the processes (S10 and S11) from installing the projection device 20 to recognizing the position of the worker 120 are the same as in the embodiment.

Based on the positions recognized by the recognition unit 24, the data processing unit 32 determines the order of the work locations with the shortest movement distance (S22). The process of determining the first work location as the target location based on the position of worker 120 is the same as in the embodiment. Thereafter, the target location is replaced with the position of the worker 120, and the work location with the shortest moving distance from the position is sequentially determined as the target location. As a result, the order in which each of the plurality of work locations is determined as the target location is determined. Alternatively, the data processing unit 32 may determine the order in which the movement distance when tracing all of the plurality of work locations from the position recognized by the recognition unit 24 is the shortest.

After that, the operations from step S13 to step S16 are performed in the same manner as in the first embodiment. After finishing the work at one work place (Yes in S16), if there is a next work place (Yes in S27), the next target place has already been determined, so steps S13 to S16 are repeated. .

As described above, in the projection system 10 according to the present modification, for example, the data processing unit 32 further determines the order of determining each of the plurality of work locations as target locations. The projection device 20 projects the target drawing onto the target location in the order determined by the data processing unit 32 . Further, in the projection method according to the present modification, for example, in the determining step, the order of determining each of the plurality of work locations as target locations is determined. The projecting step projects the target drawing onto the target location in the determined order.

As a result, the process of recognizing the position of the worker 120 can be performed only once, so the amount of calculation required for recognition can be reduced, and power consumption can be reduced. Also, for example, since the projection order of the drawings is determined first, the projection device 20 can simultaneously project a plurality of drawings together with the numbers representing the respective orders. In this case, the next work place and the next work place are presented to the worker 120, so that the moving direction can be notified in advance, and the work efficiency of the worker 120 can be further improved.

[Modification 3]
Further, for example, the projection device 20 does not have to include the driving section 27 . In other words, the projection device 20 does not have to have the function of automatically changing the orientation. In this case, as shown in FIG. 9, it is not necessary to determine whether or not the target location exists within the range of the angle of view 111 of the projection device 20 . Note that FIG. 9 is a flowchart showing the operation of the projection system 10 according to this modification. Compared to the operation shown in FIG. 4, steps S13 and S14 are omitted.

Since the projection device 20 does not include the driving unit 27, the configuration of the projection device 20 can be simplified and the weight thereof can be reduced. For example, when the work site 100 is narrow and all work locations are included within the range of the angle of view 111, the projection device 20 according to this modification is useful. Further, when the work location is outside the range of the angle of view 111 , the operator 120 may manually change the orientation or the orientation of the projection device 20 .

[Modification 4]
Also, for example, in the above-described embodiment, an example in which the projection device 20, the data processing device 30, and the terminal device 40 are separate units has been shown, but these may be integrated. FIG. 10 is a block diagram showing the functional configuration of a projection device 220 according to this modification.

A projection device 220 shown in FIG. 10 newly includes a data processing unit 32 and an operation reception unit 42 compared to the projection device 20 according to the embodiment shown in FIG. The data processing unit 32 and the operation reception unit 42 each have the same functions as in the embodiment. Also, the projection device 220 does not include the communication unit 21 . Design data and drawing data are stored in the storage unit 26 of the projection device 220 .

In this modified example, the worker 120 does not possess the terminal device 40 . In this case, the end of the work is determined based on the recognition result by the recognition unit 24, for example. Specifically, by photographing the worker 120, it is possible to determine the movement of the worker 120 and the end of the work at the work location. For example, when the worker 120 performs marking work, it can be considered that an instruction to end the work has been received when it is possible to detect that marking has been completed at the work location. As a result, the data processing unit 32 determines the next target location and target drawing.

As described above, the projection device 220 according to the present modification includes the recognition unit 24 that recognizes the position of the worker 120 who performs work at each of a plurality of work locations on the work site 100, and the design data representing the plurality of work locations. and a target location, which is a work location where the movement distance of the worker 120 is the shortest, based on the position recognized by the recognition unit 24 and the position information of a plurality of work locations, and a drawing projected on the target location. A data processing unit 32 for determining a target drawing and a projection unit 23 for projecting the target drawing onto a target location.

As a result, it is not necessary to communicate with the data processing device 30 and the terminal device 40, and only by installing the projection device 220, the worker 120 can efficiently perform the work, shortening the construction period and increasing the work efficiency. It can reduce the burden on people.

Of the projection device 20, the data processing device 30, and the terminal device 40 that constitute the projection system 10, the data processing device 30 and the terminal device 40 may be integrated. For example, the terminal device 40 may include the data processing section 32 . Specifically, the design data may be stored in the storage unit 45 of the terminal device 40, and the terminal device 40 may determine the target drawing.

Also, the projection device 20 and the terminal device 40 may be integrated. Alternatively, the projection device 20 and the data processing device 30 may be integrated.

(others)
As described above, the projection system, the projection apparatus, and the projection method according to the present invention have been described based on the above embodiments and modifications thereof, but the present invention is not limited to the above embodiments.

For example, recognition unit 24 may not include a camera and receiver. For example, the recognition unit 24 may be a microphone having directivity in a plurality of directions, and may recognize the position of the worker 120 by detecting the voice or work sound uttered by the worker 120. .

Also, the communication method between the devices described in the above embodiments is not particularly limited. When wireless communication is performed between devices, the wireless communication method (communication standard) is, for example, ZigBee (registered trademark), Bluetooth (registered trademark), or short-range wireless communication such as wireless LAN (Local Area Network). be. Alternatively, the wireless communication method (communication standard) may be communication via a wide area communication network such as the Internet. Also, wire communication may be performed between devices instead of wireless communication. Wired communication is, specifically, communication using power line communication (PLC: Power Line Communication) or wired LAN.

Further, in the above-described embodiments, the processing executed by a specific processing unit may be executed by another processing unit. Also, the order of multiple processes may be changed, or multiple processes may be executed in parallel. Also, the distribution of the components of the projection system to a plurality of apparatuses is an example. For example, a component included in one device may be included in another device. Also, the projection system may be implemented as a single device.

For example, the processing described in the above embodiments may be implemented by centralized processing using a single device (system), or may be implemented by distributed processing using a plurality of devices. good. Also, the number of processors executing the above program may be singular or plural. That is, centralized processing may be performed, or distributed processing may be performed.

Further, in the above embodiments, all or part of the components such as the control unit may be configured with dedicated hardware, or implemented by executing a software program suitable for each component. good too. Each component may be implemented by a program execution unit such as a CPU (Central Processing Unit) or processor reading and executing a software program recorded in a recording medium such as a HDD (Hard Disk Drive) or semiconductor memory. good.

Also, components such as the controller may be configured with one or more electronic circuits. Each of the one or more electronic circuits may be a general-purpose circuit or a dedicated circuit.

One or more electronic circuits may include, for example, a semiconductor device, an IC (Integrated Circuit), or an LSI (Large Scale Integration). The IC or LSI may be integrated on one chip or may be integrated on a plurality of chips. Although they are called ICs or LSIs here, they may be called system LSIs, VLSIs (Very Large Scale Integrations), or ULSIs (Ultra Large Scale Integrations) depending on the degree of integration. An FPGA (Field Programmable Gate Array) that is programmed after the LSI is manufactured can also be used for the same purpose.

Also, general or specific aspects of the invention may be implemented in a system, apparatus, method, integrated circuit or computer program product. Alternatively, the computer program may be implemented by a computer-readable non-temporary recording medium such as an optical disc, HDD, or semiconductor memory. Also, any combination of systems, devices, methods, integrated circuits, computer programs and recording media may be implemented.

In addition, it can be realized by applying various modifications to each embodiment that a person skilled in the art can think of, or by arbitrarily combining the constituent elements and functions of each embodiment without departing from the spirit of the present invention. Forms are also included in the present invention.

10 projection system 20, 220 projection device 23 projection unit 24 recognition unit 24a camera 24b receiver 27 drive unit 30 data processing unit 32 data processing unit 40 terminal device (communication terminal)
42 Operation reception unit (reception unit)
100 work site 101, 102, 103 work place 110 drawing 111 angle of view 112 number 120 worker

Claims (11)

a position recognition unit that recognizes the position of a worker who performs work at each of a plurality of work locations in a work site;
A target that is a work place where the movement distance of the worker is the shortest based on the design data indicating the plurality of work places, the positions recognized by the position recognition unit, and the position information of the plurality of work places. a data processing unit that determines a location and a target drawing that is a drawing projected onto the target location;
a projection device that projects the target drawing onto the target location ;
The data processing unit further determines an order for determining each of the plurality of work locations as the target location based on the positions recognized by the position recognition unit and position information of the plurality of work locations,
The projection device projects the target drawing onto the target location in the order determined by the data processing unit.
projection system. Furthermore, a reception unit that receives an instruction to end work from the worker,
The position recognition unit recognizes the position of the worker after the instruction is received by the reception unit,
The projection system according to claim 1, wherein the data processing unit determines the target location and the target drawing each time the position of the worker is recognized by the position recognition unit. 3. The projection system according to claim 1 or 2 , wherein the projection device further projects a number representing a work order near the target location. The projection device further has a driving unit for changing the attitude of the projection device,
In the case where the driving unit projects a drawing onto a first work location and a second work location included in the plurality of work locations in this order, the second work location is projected by the projection device. If the position is outside the range of the possible angle of view, after the work at the first work place is completed, the posture of the projection device is adjusted so that the second work place is within the range of the angle of view. A projection system according to any one of claims 1 to 3 , modified. 5. The projection system according to any one of claims 1 to 4 , wherein the position recognition unit includes a camera that captures the work site. 6. The projection system according to any one of claims 1 to 5 , wherein the position recognition section includes a receiver that receives a radio signal transmitted from a communication terminal carried by the worker. a position recognition unit that recognizes the position of a worker who performs work at each of a plurality of work locations in a work site;
A target that is a work place where the movement distance of the worker is the shortest based on the design data indicating the plurality of work places, the positions recognized by the position recognition unit, and the position information of the plurality of work places. a data processing unit that determines a location and a target drawing that is a drawing projected onto the target location;
A projection unit that projects the target drawing onto the target location ,
The data processing unit further determines an order for determining each of the plurality of work locations as the target location based on the positions recognized by the position recognition unit and position information of the plurality of work locations,
The projection unit projects the target drawing onto the target location in the order determined by the data processing unit.
projection device. recognizing the position of a worker performing work at each of a plurality of work locations on a work site;
Based on design data indicating the plurality of work locations, the position of the worker, and position information of the plurality of work locations, a target location and the target, which are work locations where the worker travels the shortest distance. determining a target drawing, which is the drawing to be projected onto the location;
a projection device projecting the target drawing onto the target location ;
The determining step further determines an order for determining each of the plurality of work locations as the target location based on the positions recognized in the recognizing step and positional information of the plurality of work locations,
In the projecting step, the target drawing is projected onto the target location in the order.
projection method. Furthermore, including a step of receiving an instruction to finish work from the worker,
In the recognizing step, after the instruction is accepted, the position of the worker is recognized;
The projection method according to claim 8 , wherein in the determining step, the target location and the target drawing are determined each time the position of the worker is recognized. 10. The projection method according to claim 8 , wherein the projecting step further projects a number representing a work order near the target location. The projection device has a drive unit that changes the attitude of the projection device,
Further, when a drawing is projected in this order on a first work location and a second work location included in the plurality of work locations, the second work location is an image that can be projected by the projection device. If the projection device is positioned outside the range of the angle of view, after the work at the first work site is completed, the attitude of the projection device is changed by the drive unit so that the second work site is within the range of the angle of view. 11. A projection method according to any one of claims 8 to 10 , comprising the step of changing .

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