JP2023037934A - Lighting method for preventing entry - Google Patents

Abstract

To keep a moving object such as an operator and a robot from entering an entry prohibited region in a simple way.SOLUTION: By emitting an outgoing beam (7) containing a predetermined wavelength in a visible range from one or more lighting devices (1) toward an entry prohibited target region (201) and by illuminating an entry prohibited explicit region (4) having an appropriately the same shape as the entry prohibited target region, including the entry prohibited target region, an entry is suppressed for an operator (5) by using a visual effect of a color within the entry prohibited explicit region, and for a robot (6), entry is suppressed (avoided) by using the wavelength of the outgoing beam.SELECTED DRAWING: Figure 1

Description

The present invention relates to an intrusion prevention lighting method.

In various types of work, such as construction work, which is carried out indoors and outdoors, there are cases where areas where workers are prohibited from entering are established. When setting up a no-entry area, in general, a cone-shaped safety device called a collar cone (registered trademark), road cone, etc., and a bar or rope that spans between the color cones are used to surround the no-entry area. It visually informs staff that entry is prohibited.

As a related technology, for example, there is known a technology for monitoring persons entering a restricted area by recognizing an identification code assigned to a worker or the like from a photographed image of the restricted area. (See, for example, Patent Document 1). As another related technology, for example, a light curtain is formed by a light emitting unit and a light receiving unit at a doorway to an area where a hazard such as a press machine exists, and the light emitted from the light emitting unit is received by the light receiving unit. There is known a technique for forcibly stopping the operation of a hazard source such as a press when it is no longer detected (see Patent Document 2, for example).

JP 2017-4184 A JP-A-2003-218679

However, at work sites such as construction work where multiple works are carried out over a relatively wide area, the no-entry zone is updated daily according to the progress of the work. For this reason, a no-entry zone can be easily specified by a safety device such as a color cone, but there is a problem that the no-entry zone that can be specified depends on the length of the bar that spans between the color cones. Furthermore, it is difficult to manage what kind of state the inside of the no-entry zone is.

In addition, in the technology disclosed in Patent Document 1, the area in which an intruder can be monitored is limited, and it is necessary to change the direction of the camera and adjust the shooting area each time the no-entry area is updated. It takes time to work on them. Similarly, in the technology disclosed in Patent Document 2, it is necessary to change the position of the light curtain formed by the light projecting unit and the light receiving unit each time the no-entry area is updated. It takes time and effort.

Furthermore, in recent years, the introduction of autonomous running type or remote control type robots to work sites is progressing. Since many robots of this type travel according to a predetermined travel route, it is necessary to set the travel route so as to bypass the no-entry zone, which takes time and effort.

In one aspect, an object of the present invention is to provide a technology capable of suppressing entry of moving objects, such as workers and robots, into a no-entry area by a simple method.

An entry prevention lighting method according to one aspect includes emitting light including a predetermined wavelength in the visible range from one or more lighting devices toward a no-entry target area, and including the no-entry target area. The exit light is used to illuminate an entry prohibition zone having substantially the same shape as the prohibition target zone.

According to the above-described aspect, it is possible to prevent a moving object such as a worker or a robot from entering the no-entry area by a simple method.

1 is a perspective view illustrating a configuration example of an entry prevention lighting system according to a first embodiment; FIG. 1 is a block diagram illustrating a configuration example of a lighting device according to a first embodiment; FIG. It is a figure explaining the example of the change method of an irradiation range. It is a figure explaining the example of the control method of a light emitting element. FIG. 11 is a perspective view illustrating a configuration example of an entry prevention lighting system according to a second embodiment; FIG. 11 is a block diagram illustrating a configuration example of a lighting device according to a second embodiment; FIG. 9 is a flowchart for explaining the operation of the lighting device according to the second embodiment;

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a perspective view illustrating a configuration example of an entry prevention lighting system according to a first embodiment. FIG. 1 shows an example in which an entry prevention lighting system is applied to clearly indicate a no-entry zone at a construction site.

The anti-entry lighting system illustrated in FIG. 1 includes four lighting devices 1 (1A-1D). Each of the lighting devices 1A, 1B, 1C, and 1D enters one of eight color cones 3 (3A to 3H) arranged so as to surround a rectangular no-entry target area 201 set on the road surface 2. It is attached to the color cones 3A, 3C, 3E and 3G located at the corners of the prohibited area 201. FIG. The no-entry target area 201 is, for example, an area where moving objects such as workers 5 and robots are prohibited from entering (entering), such as an area where concrete is poured.

Each of the lighting devices 1A, 1B, 1C, and 1D can irradiate light of a predetermined wavelength in the visible range (for example, red light with a wavelength of approximately 640 nm) toward the rectangular no-entry target area 201. , are attached to the color cones 3A, 3C, 3E, and 3G in such a manner that the direction of emission of the emitted light 7 can be changed.

In the entrance-preventing lighting system of the present embodiment, by adjusting the emission direction and irradiation area of the emitted light 7 from each of the lighting devices 1A, 1B, 1C, and 1D, a rectangular shape including the entire entry-prohibited target area 201 can be obtained. Illuminate the area 4 where entry is prohibited. The no-entry clearly defined area 4 is an area where the no-entry target area 201 is explicitly notified to the workers 5 and the like with light of a predetermined wavelength. In FIG. 1, a ring-shaped area that is not subject to entry prohibition surrounding the entry prohibition target area 201 is included in the no-entry clearly indicated area 4, but part or all of the outer periphery of the no-entry clearly indicated area 4 may be entered. It may overlap with the prohibited area 201 .

For example, if the entry-prohibited area 201 is an area where concrete has been placed, it is necessary to prohibit the worker 5 from entering (entering) until the concrete hardens sufficiently. For this reason, at conventional construction sites, as illustrated in FIG. However, the shape and extent of the area that can be specified by the color cones 3 and bars depends on the length of the bars that span the color cones 3 . For this reason, in the conventional method using the color cone 3 and the bar, the shape and range (width) of the prohibited area 201 are not unique and can be updated depending on the situation. difficult to do In addition, when the worker 5 is notified of the prohibition of entry only by safety equipment such as the color cone 3 and the bar (that is, when the prohibition of entry clearly indicated area 4 is not indicated), the state in the prohibited area 201 area (for example, It is difficult to visually recognize the degree of hardening of concrete, etc.).

On the other hand, when the entry prevention lighting system of the present embodiment is applied, the no-entry clearly indicated area 4 including the no-entry target area 201 is illuminated with light of a color (for example, red light) that calls attention or suggests danger. can be illuminated. Therefore, it is possible to prevent the worker 5 from entering the no entry zone 4 .

In addition, when the inside of the clearly stated no-entry zone 4 is illuminated with light of a predetermined wavelength (for example, red light with a wavelength of about 640 nm), for example, an optical sensor (not shown) provided in the robot 6 such as an autonomous mobile robot ) can detect the light of the predetermined wavelength from the front region 601 . As a result, it is possible to change the traveling route before the robot 6 enters the clearly stated no entry zone 4, thereby avoiding (suppressing) the robot 6 from entering the clearly stated no entry zone 4 (no entry target zone 201). be able to.

In this way, the entry prevention lighting system of the present embodiment notifies the shape, range, and state of the entry prohibition target area 201 by the shape, range, and color of the clearly indicated no entry area 4, and the worker 5 , robot 6 or the like can be prevented from entering. For this reason, when the entry prevention lighting system of this embodiment is applied, for example, color cones 3B, 3D, 3F and It is possible to omit the use of 3H and the bar that bridges between the color cones 3.

FIG. 2 is a block diagram illustrating a configuration example of the lighting device according to the first embodiment. The lighting device 1 illustrated in FIG. including. These components included in the lighting device 1 operate with power supplied from a power source (not shown) such as a battery or commercial power source. The power source may have any known configuration, and may be one to which wireless power supply technology is applied, for example. For example, the power source may be a battery that can be charged by wireless power supply using the robot 6 that patrols the construction site.

A control unit 101 controls the overall operation of the lighting device 1 . The control unit 101 controls the irradiation range of light based on, for example, the angle (orientation) of the device 1 detected by the angle sensor 109 and the correspondence information stored in the storage unit 102 . The correspondence information stored in the storage unit 102 includes, for example, the correspondence relationship between the angle of the self-device 1 and the light irradiation range corresponding to the no-entry clearly defined area 4 .

The input unit 103 includes, for example, a switch for turning on/off the power, a switch for setting the color of light to be emitted, a switch for setting the brightness of light to be emitted, and the like. The display unit 104 includes, for example, a display lamp or the like that visually notifies the state of the lighting device 1 .

The red LED 105 , the green LED 106 , and the blue LED 107 are examples of light-emitting elements that emit light to illuminate the prohibited area 201 . The light-emitting elements are not limited to the combination of the red LED 105, the green LED 106, and the blue LED 107, and can be changed as appropriate. A light-emitting element in the lighting device 1 may be a point light source or a surface light source. The lighting device 1 may have a plurality of red LEDs 105, green LEDs 106, and blue LEDs 107, which may be arranged in a matrix. The LED drive unit 108 controls the current applied to the red LED 105, the green LED 106, and the blue LED 107 based on the light color and light brightness set by the input unit 103, for example.

The lighting device 1 of the present embodiment may include components other than the components described above with reference to FIG. 2 (for example, an optical system for adjusting the shape and emission range of the emitted light 7).

FIG. 3 is a diagram illustrating an example of a method for changing the irradiation range. FIG. 3(a) schematically shows an example of a light irradiation range in a plane including the normal direction (vertical direction) of the road surface 2, and FIG. 3(b) shows the road surface 2. 4 schematically shows an example of a method for changing the irradiation range of light within a plane viewed from above.

The lighting device 1 of this embodiment is attached to the top of a color cone 3 arranged on the road surface 2, for example, as shown in FIG. 3(a). In this case, the orientation of the lighting device 1 is adjusted so that the central direction 701 of the emitted light 7 is at an angle of depression and the entry prohibited area 201 on the road surface 2 is illuminated with the emitted light 7 .

The shape of the illumination area when the road surface 2 is illuminated by the emitted light 7 is the shape of the emitted light 7, the emission angles θ1 and θ2 when the emitted light 7 is emitted from the lighting device 1, and the center direction 701 of the emitted light 7. incident angle θ3 on the road surface 2. For example, when the shape of the emitted light 7 is a rectangle, the shape of the illumination area 401 on the road surface 2 is a trapezoid, as illustrated in FIG. 3B. At this time, the emission angle θ2 in the horizontal plane may be less than 90 degrees, and the lighting device 1 may be installed at the corner of the quadrilateral prohibited area 201 as illustrated in FIG. In such a case, for example, as shown in FIG. , and emitted from the lighting device 1. As a result, it is possible to illuminate the rectangular no-entry clearly defined area 4 including the entire rectangular no-entry target area 201 .

Further, when the lighting device 1 is installed on the side of the quadrilateral prohibited area 201 (for example, the color cone 3B in FIG. 1), for example, as shown in FIG. The shape of the emitted light 7 may be corrected such that the area 401 is transformed into a rectangular illumination area 402 . For such correction of the shape of the emitted light 7, a well-known correction method in the field of optics, such as that described in Japanese Unexamined Patent Application Publication No. 2001-339671, can be applied.

Further, although detailed description with reference to the drawings is omitted, the shape of the emitted light 7 may be oval such as a circle or an ellipse. The shape of the emitted light 7 is not limited to a specific shape, and the planar shape of the prohibited area 201 and the number and arrangement of the lighting devices 1 (output light 7) used to form the clearly prohibited area 4 can be changed as appropriate based on The planar shape of the no-entry target area 201 is not limited to a quadrangle (square or rectangle) having four 90-degree corners as described above with reference to FIG. It may be another quadrangle having a shape, or may be a polygon other than a quadrangle. Further, the planar shape of the no-entry target area 201 and the clearly stated no-entry area 4 may be partially or wholly curved (for example, arc).

When the lighting device 1 illuminates the no-entry target area 201, the light-emitting elements such as the red LED 105 described with reference to FIG. may be intermittently lit (dynamic lighting).

FIG. 4 is a diagram for explaining an example of a method for controlling light emitting elements. FIG. 4(a) shows an example of a pulse current when only a single-color light-emitting element (for example, the red LED 105) is intermittently lit, and FIG. 1 shows an example of a pulse current in the case of intermittently lighting the light emitting element of .

When the exit light 7 from the lighting device 1 is used to form the clearly marked no-entry zone 4, the exit light 7 is often preferably red light that calls attention or suggests danger, as described above. When the emitted light 7 is red light, the lighting device 1 applies a drive current only to the red LED 105 to cause it to emit light. In this case, the red LED 105 may be continuously lit (permanently lit), but if the lighting device 1 is battery-driven, a pulse current 801 as shown in FIG. , can extend battery life. Note that the pulse width W1 and period of the pulse current 801 can be changed as appropriate.

Further, when the lighting device 1 illustrated in FIG. 2 has three light-emitting elements, the red LED 105, the green LED 106, and the blue LED 107, the emitted light 7 that illuminates the no-entry target area 201 has a plurality of colors. You can select and switch between For example, depending on the state of the prohibited entry target area 201, the setting of moving objects that are prohibited from entering (for example, both the worker 5 and the robot 6, only the worker 5, etc.), etc. The color of the emitted light 7 to be used can be changed.

FIG. 4(b) shows pulse currents 802 and 803 when the red LED 105 and the green LED 106 are intermittently lit as an example of making the no-entry zone 4 different from red in color. In this example, the pulse current 802 applied to the red LED 105 is "H" while the pulse current 803 applied to the green LED 106 is "L", and the pulse current 802 applied to the red LED 105 is "L". The pulse current 803 applied to the LED 106 becomes "H". That is, in the example shown in FIG. 4B, the red LED 105 and the green LED 106 are intermittently lit alternately. Therefore, by adjusting the pulse widths W2 and W3 of the pulse currents 802 and 803 and the interval ΔW of the pulses, the visual color of the designated no entry zone 4 formed (illuminated) by the emitted light 7 can be changed to red light. and green light can be additively mixed to produce yellow (orange). Further, by changing the combination of intermittent light colors (light-emitting elements), etc., it is possible to form the no-entry clear zone 4 of another color. For example, if the lighting device 1 has a timer, the color of the clearly marked no entry area 4 may change with the passage of time from the start of illumination of the no entry target area 201 . In this way, for example, when an area where concrete is placed is specified as a restricted area, the elapsed time after the concrete is placed can be clearly indicated by a change in light, and the color of the restricted area 4 The condition of the concrete can be grasped by

As described above, according to the entry prevention lighting system of the present embodiment, by illuminating the entry prohibition target area 201 to form the entry prohibition clearly defined zone 4, the worker 5 is directed to the entry prohibition target area 201 position and range can be visually notified. Therefore, it is possible to prevent the worker 5 from entering the prohibited area 201 without using safety devices such as the collar cone 3 and the bar. In particular, by clearly indicating the no-entry target area 201 with visible light of a color different from that of the road surface 2 including the no-entry target area 201 and suggesting caution and danger, the worker 5 can enter the no-entry target area. Entry into 201 can be suppressed more effectively.

In addition, by emitting light containing light of a predetermined wavelength as the emitted light 7 for illuminating the entry prohibition target area 201, the robot 6 such as an autonomous mobile robot, for example, can In addition, it is possible to change the traveling route by detecting the light of the predetermined wavelength ahead (no entry zone 4).

In addition, when the no-entry target area 201 to be notified is updated, for example, the explicit no-entry area 4 can be updated by a simple method such as changing the direction of the lighting device 1 or the irradiation range of the emitted light 7. . Furthermore, the planar shape of the defined no-entry zone 4 can be easily changed by changing the number and shape of the outgoing light beams 7 that illuminate the no-entry target zone 201 . For this reason, compared to the conventional method of preventing entry using safety devices such as the collar cone 3 and bars, it is possible to flexibly cope with updating (changing) the planar shape of the no-entry target area 201, etc. can.

Note that the lighting device 1 in the entry prevention lighting system according to the present embodiment is not limited to the top of the color cone 3 as illustrated in FIG. It may be installed at a higher place by using, for example. By installing the lighting device 1 at a higher place, the lighting range of one lighting device 1 can be widened. It is possible to suppress an increase in costs related to the introduction and maintenance of the entry prevention lighting system.

Also, the lighting device 1 according to the present embodiment is not limited to the configuration described with reference to FIG. 2, and can be modified as appropriate. For example, the lighting device 1 may be a lighting device that includes only single-color light-emitting elements and emits light 7 of a single color, as described above. Additionally, the lighting device 1 may be a device that emits emitted light 7 including visible light and invisible light.

Also, the lighting device 1 has, for example, a communication unit as described in the second embodiment with reference to FIG. It may be possible. When the lighting device 1 that can communicate with the information processing device is used, for example, the worker 5 or the like can operate the information processing device to control the orientation of the lighting device 1, the color and shape of the emitted light 7, and the like. good too. Also, the lighting device 1 having a communication unit may communicate with the robot 6 that patrols within a predetermined area such as a construction site where the prohibited area 201 is set.

[Second embodiment]
FIG. 5 is a perspective view illustrating a configuration example of an entry prevention lighting system according to the second embodiment.

The entry prevention lighting system illustrated in FIG. 5 includes four lighting devices 1 (1A to 1D). The lighting devices 1A, 1B, 1C, and 1D are attached to color cones 3A, 3C, 3E, and 3G, respectively, arranged at the corners of a rectangular no-entry target area 201 set on the road surface 2. ing.

One or more lighting devices 1 included in the entry-preventing lighting system of the present embodiment, for example, measure the temperature in the first measurement area 210 inside the entry-prohibited area 201 and the temperature outside the entry-prohibited area 201. It has a function of measuring the temperature in the second measurement area 211 . In the system illustrated in FIG. 5, one lighting device 1C among the four lighting devices 1A to 1D measures the temperatures in the first measurement area 210 and the second measurement area 211. In FIG.

FIG. 6 is a block diagram illustrating a configuration example of a lighting device according to the second embodiment. For example, as shown in FIG. 6, the lighting device 1 having a function of measuring temperature includes a control unit 101, a storage unit 102, an input unit 103, a display unit 104, a red LED 105, a green LED 106, a blue LED 107, and an LED driving unit. 108 , and an angle sensor 109 . The lighting device 1 illustrated in FIG. 6 also includes an infrared sensor 111 and a communication unit 112 . The lighting device 1 of this embodiment, like the lighting device 1 of the first embodiment described above with reference to FIG. . The power source may have any known configuration, and may be one to which wireless power supply technology is applied, for example.

The control unit 101, storage unit 102, input unit 103, display unit 104, red LED 105, green LED 106, blue LED 107, LED driving unit 108, and angle sensor 109 each perform the functions described in the first embodiment. perform actions for

The infrared sensor 111 includes one or more infrared imaging elements and is used to measure the temperature within the first measurement area 210 and the temperature within the second measurement area 211 . Therefore, the control unit 101 performs an operation for controlling the color of the emitted light 7 based on the temperature measurement result of the infrared sensor 111, in addition to the operation for implementing the functions described in the first embodiment.

The communication unit 112, for example, according to a wireless communication standard such as Wi-Fi (registered trademark), Bluetooth (registered trademark), Bluetooth Low Energy (registered trademark), for example, another lighting device 1, a tablet computer, a smartphone, etc. Wireless communication is performed with the information processing device 9 . The communication unit 112 can also be used for wireless communication with the robot 6, for example.

The lighting device 1 of the present embodiment may include components other than the components described above with reference to FIG. 6 (for example, an optical system for adjusting the shape and emission range of the emitted light 7).

FIG. 7 is a flowchart for explaining the operation of the lighting device according to the second embodiment.

When the lighting device 1 of the present embodiment is turned on, for example, it starts emitting light in an initial setting color (step S101), and starts measuring and recording temperature (step S102). In step S102, the lighting device 1 (for example, the lighting device 1C in FIG. 5) measures the temperature in the first measurement area 210 and the temperature in the second measurement area 211 with the infrared sensor 111, and collects information on the measured temperatures. is stored in the storage unit 102.

After that, the lighting device 1 determines whether or not it is time to confirm whether the color of the emitted light (the color of the emitted light 7) is appropriate (step S103). The lighting device 1, for example, operates a timer (not shown in FIG. 6) to determine whether or not the timing for confirmation has arrived. If the confirmation timing has not arrived (step S103; NO), the lighting device 1 maintains the emission color at that time and repeats the determination of step S103.

If the timing for confirmation has arrived (step S103; YES), the lighting device 1 next determines that the color of the emitted light 7 is the current temperature based on the temperature in the first measurement area 210 and the temperature in the second measurement area 211. (step S104). The current evaluation temperature is, for example, a value obtained by subtracting the temperature in the second measurement area 211 from the temperature in the first measurement area 210 . The control unit 101 of the lighting device 1 calculates the current evaluation temperature, and based on the information indicating the correspondence relationship between the evaluation temperature and the emission color stored in the storage unit 102 and the current emission color of the emitted light 7. , determines whether or not the emission color corresponds to the current evaluation temperature. If it is the corresponding emission color (step S104; YES), the lighting device 1 maintains the emission color at that time and returns to the determination of step S103.

On the other hand, if the emission color does not correspond (step S104; NO), the lighting device 1 changes the emission color (step S105), and returns to the determination of step S103. In step S105, the control unit 101 of the lighting device 1 identifies the light emitting element to which the pulse current is applied based on the information indicating the correspondence relationship between the evaluation temperature and the emission color stored in the storage unit 102, and the LED driving unit 108 to drive the light emitting elements (eg, one or more of red LED 105, green LED 106, and blue LED 107). When steps S102 to S104 are performed by only one lighting device 1 out of the plurality of lighting devices 1, that one lighting device 1 communicates information indicating the emission color of the emitted light 7 in step S105. It is transmitted to another lighting device 1 via the unit 112 . In this case, the other lighting device 1 that does not perform steps S102 to S104 changes the emission color of the emission light 7 of its own device according to the information indicating the emission color of the emission light 7 received via the communication unit 112 . After step S105, the lighting device 1 returns to the determination of step S103.

Here, one specific example of the determination in step S104 and the processing in step S105 will be described. For example, when concrete is placed in the no-entry zone 201, the temperature of the concrete after placement rises, then decreases, and finally reaches approximately the same temperature outside the no-entry zone 201. become. Such a temperature change of concrete after placing is related to progress of hardening of the concrete. Therefore, the type of moving objects (including workers) whose entry is prohibited is changed by determining the progress of hardening of the concrete in the prohibited area 201 based on the temperature of the concrete after placing. be able to.

For example, since the concrete has not yet started to harden immediately after it has been placed, the shape of the surface will be deformed even if a light moving object such as the robot 6 enters the prohibited area 201 . For this reason, if it is determined that the concrete has not sufficiently hardened based on the temperature in the first measurement area 210 and the temperature in the second measurement area 211, for example, a lightweight robot such as the robot 6 The entry prohibition target area 201 is illuminated with emitted light 7 (for example, red light with a wavelength of about 640 nm) indicating that entry of all moving objects including the moving object is prohibited. In this case, the worker 5 visually recognizes that the entry prohibition target zone 201 must not be entered because the concrete is not sufficiently hardened because the entry prohibition zone 4 is red. can be done. In addition, the robot 6 such as an autonomous mobile robot also detects that there is an expressly prohibited entry zone 4 irradiated with red light with a wavelength of about 640 nm in front by an optical sensor, and before entering the expressly prohibited entry zone 4 You can change the driving route to

Further, for example, based on the temperature in the first measurement area 210 and the temperature in the second measurement area 211, when a light moving object such as the robot 6 enters the prohibited area 201, the surface When it is determined that the concrete has hardened to such an extent that deformation of the shape does not occur, emitted light 7 of a color (for example, yellow (orange) light) indicating that the entry of the robot 6 is permitted is emitted. The no-entry target area 201 is irradiated. In this case, the worker 5 visually recognizes that the no-entry zone 4 is yellow (orange) and that the concrete is hardening but must not enter the no-entry zone 201 yet. can be recognized. Further, the robot 6 determines whether or not it is permitted to enter the designated no-entry zone 4 based on, for example, the wavelength components of the forward light detected by the optical sensor, and enters if it is not permitted. You can make a running route before.

Further, when changing the emission color (the color of the emitted light 7) based on the temperature in the first measurement region 210 and the temperature in the second measurement region 211, for example, it is possible to use more emission colors. Thus, it is possible to visually grasp whether the hardening of concrete is progressing appropriately.

As described above, according to the entry prevention lighting system of the present embodiment, by illuminating the entry prohibition target area 201 to form the entry prohibition clearly defined zone 4, the worker 5 is directed to the entry prohibition target area 201 position and range can be visually notified. In addition, when the no-entry target area 201 to be notified is updated, for example, the explicit no-entry area 4 can be updated by a simple method such as changing the direction of the lighting device 1 or the irradiation range of the emitted light 7. . Furthermore, since the planar shape of the clearly defined no-entry zone 4 formed can be easily changed by the number and shape of the emitted light 7 that illuminates the no-entry target zone 201, the planar shape of the no-entry zone 201 can be easily changed. Updates (changes) can also be flexibly handled.

In addition, by emitting light containing light of a predetermined wavelength as the emitted light 7 for illuminating the entry prohibition target area 201, the robot 6 such as an autonomous mobile robot, for example, can In addition, it is possible to change the traveling route by detecting the light of the predetermined wavelength ahead (no entry zone 4).

Further, by controlling the color of the emitted light 7 based on the temperature inside the prohibited area 201 and the temperature outside the prohibited area 201, the state inside the prohibited area 201 can be visually recognized easily. be able to. In the above-described embodiment, the progress of hardening of concrete is determined (estimated) based on the temperature measured by the infrared sensor 111, and the color of the emitted light 7 is changed. The information may be used to determine (estimate) another state within the prohibited area 201 . Further, the information used to determine the state of the entry prohibited area 201 is not limited to the temperature, and may be other information. For example, as a different usage of the infrared sensor 111, the moisture content is measured using the spectral reflectance in the infrared wavelength band, and the color of the emitted light 7 is controlled according to the moisture content.

In addition, the function of acquiring information indicating the state of the prohibited area 201, such as the infrared sensor 111 illustrated in FIG. good too.

If the lighting device 1 can communicate with an information processing device 9 such as a tablet computer or a smart phone, information such as temperature measured by the lighting device 1 may be transferred to the information processing device 9 . In such a form, for example, a worker who operates the information processing device 9 determines the state of the entry prohibited area 201 based on information such as the temperature acquired from the lighting device 1, and determines the color of the emitted light 7. may be transmitted to the lighting device 1.

Note that the entry prevention lighting method of the present embodiment, for example, has a configuration in which all the lighting devices 1 have infrared sensors 111 as illustrated in FIG. The color of the emitted light 7 may be controlled based on the measured temperature information. For example, if the no-entry target area 201 designated as one area is relatively large, the inside of the one no-entry target area 201 is divided into a plurality of sub-areas, and the infrared sensor 111 detects each sub-area. The color of the emitted light 7 may be controlled based on the measured temperature information.

The above-described embodiments are specific examples for easy understanding of the invention, and the present invention is not limited to the above-described embodiments. The entry-prohibited area 201 to which the entry-preventing lighting system according to the present invention can be applied is not limited to the concrete-placed area as described above. The configuration, functions, and operations of the lighting device 1 and the entry prevention lighting method using the lighting device 1 can be variously modified and changed without departing from the scope of the claims. For example, the control unit 101, the storage unit 102, and the like in the lighting device 1 may be configured by dedicated hardware for performing the functions described above, or may be configured by a general-purpose computer and a program to be executed by the computer. good too.

1, 1A to 1D lighting device 101 control unit 102 storage unit 103 input unit 104 display unit 105 red LED
106 green LEDs
107 Blue LED
108 LED driving unit 109 Angle sensor 110 Light emitting element 111 Infrared sensor 112 Communication unit 150 Optical system 2 Road surface 201 No entry target area 3, 3A to 3G Color cone 4 No entry clear areas 401, 402 Lighting area 5 Worker 6 Robot 7 Exit Emitted light 701 Central direction of emitted light 801, 802, 803 Pulse current 9 Information processing device

Claims (8)

Emitted light including a predetermined wavelength in the visible range is emitted from one or more lighting devices toward a prohibited area, and a clearly defined prohibited area having substantially the same shape as the prohibited area, including the prohibited area. is illuminated with the emitted light. 2. The entrance prevention lighting method according to claim 1, wherein the emitted light includes wavelengths within a wavelength range of red light. 3. The entry prevention lighting method according to claim 1, wherein the predetermined wavelength of the emitted light is selected based on a type of moving object prohibited from entering the entry prohibited area. . The entry prevention lighting method according to any one of claims 1 to 3, wherein the predetermined wavelength of the emitted light is selected based on the state of the entry prohibited area. 4. The method further comprising detecting a state of the prohibited area with a detection device, and changing a color of the emitted light based on the detected state of the prohibited area. The entry prevention lighting method according to any one of 1 to 4. 6. The entry prevention lighting method according to claim 5, wherein the detection device detects at least the temperature in the prohibited area, and the color of the emitted light is changed based on the detected temperature. . An information processing device capable of communicating with the lighting device and the detection device acquires the state of the prohibited area detected by the detection device, and emits light according to the acquired state of the prohibited area. 7. The approach prevention lighting method according to claim 5, wherein information designating a color is transmitted from said information processing device to said lighting device. The entry prevention lighting according to any one of claims 1 to 7, wherein the lighting device applies a pulse current to an LED (Light Emitting Diode) to emit light containing the predetermined wavelength. Method.

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