WO2022234684A1

WO2022234684A1 - Ultraviolet light irradiation device, ultraviolet light irradiation method, and non-transitory computer-readable medium

Info

Publication number: WO2022234684A1
Application number: PCT/JP2021/030959
Authority: WO
Inventors: 健一山岬; 孝立河
Original assignee: 日本電気株式会社
Priority date: 2021-05-07
Filing date: 2021-08-24
Publication date: 2022-11-10
Also published as: WO2022234682A1

Abstract

Provided is an ultraviolet light irradiation device, an ultraviolet light irradiation method, and a program which enable efficient and safe ultraviolet light irradiation. An ultraviolet light irradiation device (100) comprises: a light source (4) for radiating ultraviolet light (L1a); a holding unit (1) for holding the light source (4) so as to be capable of irradiating a floor surface with the ultraviolet light (L1a); a bar (2) rotatably mounted to the holding unit (1) and being able to be grasped by a user (H1); and a moving mechanism (3) for supporting the holding unit (1) so as to be moveable on the floor surface. The ultraviolet light irradiation device (100) further comprises a bar axial direction detecting unit (5) for detecting the axial direction of the bar (2), and a light source control unit (6) for controlling the irradiation performed by the light source (4), on the basis of the detected axial direction of the bar (2).

Description

Ultraviolet light irradiation device, ultraviolet light irradiation method, and non-transitory computer-readable medium

The present invention relates to an ultraviolet light irradiation device, an ultraviolet light irradiation method, and a program.

The ultraviolet light irradiation device disclosed in Patent Document 1 can be held in the hand of an operator to easily irradiate the virus adhering to the floor with ultraviolet light, thereby suppressing the activity of the virus.

Utility Model Registration No. 3127338

The inventors of the present application discovered the following technical problems.
Such an ultraviolet light irradiation device may be used to irradiate a floor surface, a tabletop, a wall surface, or the like with ultraviolet light. There is room for further study on the efficiency of ultraviolet light irradiation.

An object of the present disclosure is to provide an ultraviolet light irradiation device, an ultraviolet light irradiation method, and a program capable of efficiently irradiating ultraviolet light in view of the above-described problems.

An ultraviolet light irradiation device according to one embodiment of the present disclosure includes:
a light source that emits ultraviolet light;
a holding unit that holds the light source so that the light source can irradiate the floor surface with the ultraviolet light;
a bar that is rotatably provided on the holding portion and that can be gripped by a user;
a moving mechanism that movably supports the holding part on the floor,
a bar axial direction detection unit for detecting the axial direction of the bar;
a light source control unit that controls irradiation by the light source based on the detected axial direction of the bar.

An ultraviolet light irradiation method according to one embodiment of the present disclosure includes:
a light source that emits ultraviolet light;
a holding unit that holds the light source so that the light source can irradiate the floor surface with the ultraviolet light;
a bar that is rotatably provided on the holding portion and that can be gripped by a user;
In an ultraviolet light irradiation method applicable to an ultraviolet light irradiation device comprising a moving mechanism that movably supports the holding part on the floor surface,
sensing the axial orientation of the bar;
and controlling illumination by the light source based on the sensed axial orientation of the bar.

A non-transitory computer-readable medium storing a program according to one embodiment of the present disclosure is
a light source that emits ultraviolet light;
a holding unit that holds the light source so that the light source can irradiate the floor surface with the ultraviolet light;
a bar that is rotatably provided on the holding portion and that can be gripped by a user;
a moving mechanism that movably supports the holding part on the floor;
A computer that operates as a light source control unit of an ultraviolet light irradiation device that includes a bar axial direction detection unit that detects the axial direction of the bar,
obtaining the axial direction of the bar;
and controlling illumination by the light source based on the acquired axial direction of the bar.

According to the present disclosure, it is possible to provide an ultraviolet light irradiation device, an ultraviolet light irradiation method, and a program that can efficiently irradiate an object to be irradiated with ultraviolet light.

1 is a perspective view showing a configuration example of an ultraviolet light irradiation device according to a first embodiment; FIG. 3 is another perspective view showing a configuration example of the ultraviolet light irradiation device according to the first embodiment; FIG. FIG. 4 is a diagram showing one operation example of one configuration example of the ultraviolet light irradiation device according to the first embodiment; 2 is a block configuration diagram showing an example of a control system of the ultraviolet light irradiation device according to Embodiment 1; FIG. 4 is a flowchart showing one operation of one configuration example of the ultraviolet light irradiation device according to the first embodiment; 1 is a schematic cross-sectional view showing a cross-section of part of a configuration example of an ultraviolet light irradiation device according to a first embodiment; FIG. FIG. 7 is a diagram showing another operation example of one configuration example of the ultraviolet light irradiation device according to the first embodiment; FIG. 10 is a perspective view showing a configuration example of an ultraviolet light irradiation device according to a second embodiment; It is a cross-sectional schematic diagram which shows the one part cross section of one structural example of the ultraviolet-light irradiation apparatus concerning Embodiment 2. FIG. FIG. 7 is a block configuration diagram showing an example of a control system of an ultraviolet light irradiation device according to a second embodiment; FIG. FIG. 11 is a perspective view showing a configuration example of an ultraviolet light irradiation device according to a third embodiment; FIG. 9 is a block configuration diagram showing a control system of an ultraviolet light irradiation device according to Embodiment 3; It is a figure which shows one structural example of the hardware contained in an ultraviolet light irradiation apparatus. FIG. 11 is a perspective view showing a configuration example of an ultraviolet light irradiation device according to a fourth embodiment; FIG. 12 is a perspective view showing a modified example of the ultraviolet light irradiation device according to the fourth embodiment; FIG. 11 is a perspective view showing another modification of the ultraviolet light irradiation device according to the fourth embodiment;

Specific embodiments to which the present invention is applied will be described in detail below with reference to the drawings. However, the present invention is not limited to the following embodiments. Also, for clarity of explanation, the following description and drawings are simplified as appropriate.

(Embodiment 1)
Embodiment 1 of the present disclosure will be described with reference to FIGS. 1 to 6. FIG. FIG. 1 is a perspective view showing a configuration example of an ultraviolet light irradiation device according to a first embodiment. FIG. 2 is a perspective view showing one configuration example of the ultraviolet light irradiation device shown in FIG. FIG. 3 is a diagram showing an operation example of one configuration example of the ultraviolet light irradiation device shown in FIGS. 1 and 2. FIG. It should be noted that, of course, the right-handed XYZ coordinates shown in FIG. 1 and other drawings are for convenience in describing the positional relationship of the constituent elements. Normally, the plus direction of the Z axis is vertically upward, and the XY plane is the horizontal plane, which are common among the drawings.

As shown in FIGS. 1 and 2, the ultraviolet light irradiation device 100 includes a holding portion 1, a bar 2, a moving mechanism 3, and a light source 4.

The holding part 1 holds the light source 4 . The holding part 1 according to this embodiment is a rectangular parallelepiped housing.

The bar 2 is provided on the holding portion 1 so as to be rotatable around the rotation axis Y1. The bar 2 according to this embodiment can be rotated behind the ultraviolet light irradiation device 100 (here, the negative side of the X axis).

As shown in FIG. 3, the bar 2 has a shape that can be gripped by the user H1. Since the bar 2 is rotatable around the rotation axis Y1, the axis of the bar 2 can be set vertically (here, the Z-axis direction), horizontally (here, along the XY plane), or relative to the vertical line Z1. , extending along a straight line A1 sloping at The vertical line Z1 is a straight line extending in the Z-axis direction, that is, in the direction of gravity. The angle α between the axis of the bar 2 and the vertical line Z1 is within a predetermined range, for example, 0 degrees or more and 90 degrees or less. If the angle α is 0 degrees, the axis of the bar 2 extends vertically. If the angle α is 90 degrees, the axis of bar 2 extends horizontally. When the user H1 grips the bar 2 and operates the ultraviolet light irradiation device 100, the bar 2 rotates around the rotation axis Y1. When the bar 2 rotates around the rotation axis Y1, the angle α formed by the intersection of the axis of the bar 2 and the vertical line Z1 is within a predetermined range, for example, greater than 0 degrees and less than 90 degrees.

The moving mechanism 3 movably supports the holding part 1 on the floor. The moving mechanism 3 has, for example, at least one wheel. The moving mechanism 3 according to this embodiment includes four wheels, and the four wheels are rotatably provided at the four corners of the bottom surface of the holding portion 1, respectively. When the user H1 grips and moves the bar 2, the wheels of the moving mechanism 3 rotate. As a result, the holding part 1 moves on the floor via the moving mechanism 3 . This allows the user H1 to move the ultraviolet light irradiation device 100 to a desired position on the floor.

The light source 4 may include, for example, a UV-LED (ultraviolet light emitting diode) or an ultraviolet lamp. The number of light sources 4 is at least one.

The light source 4 is held by the holding portion 1 so as to be able to irradiate ultraviolet light downward from the holding portion 1 . When the light source 4 irradiates an object to be irradiated with ultraviolet light, an effect of suppressing viruses adhering to the object to be irradiated can be obtained. The object to be irradiated is, for example, a floor surface. The ultraviolet light emitted by the light source 4 preferably has a predetermined wavelength range capable of suppressing virus activity. A visible light source (not shown) may be arranged in the vicinity of the light source 4 to irradiate the visible light so as to be aligned with the ultraviolet light emitted by the light source 4 . Alternatively, the light source 4 may irradiate the phosphor with part of the ultraviolet light to generate excitation light from the phosphor. With these, the user may be able to confirm with the naked eye whether or not the light source 4 is emitting ultraviolet light.

Next, the control system of the ultraviolet light irradiation device 100 will be described with reference to FIG. FIG. 4 is a block configuration diagram showing an example of a control system of the ultraviolet light irradiation device shown in FIGS. 1-3.

The ultraviolet light irradiation device 100 includes a control section 10 and a bar axial direction detection section 5 . The controller 10 includes a light source controller 6 .

The bar axial direction detector 5 detects the axial direction of the bar 2 . The bar axial direction detection unit 5 is, for example, an angle sensor provided near the rotation axis Y1 of the bar 2 .

The light source control unit 6 acquires the axial direction of the bar 2 detected by the bar axial direction detection unit 5 . The light source control unit 6 controls irradiation by the light source 4 based on the obtained axial direction of the bar 2 .

Specifically, when the obtained axial direction of the bar 2 is the same as the direction in which the vertical line Z1 extends, the light source control unit 6 does not start the irradiation of the ultraviolet light by the light source 4, but keeps it stopped. do. Further, when the obtained axial direction of the bar 2 is the same as the extending direction of the straight line A1 inclined with respect to the vertical line Z1, the light source control unit 6 causes the light source 4 to start irradiating ultraviolet light.

Here, the operation of the ultraviolet light irradiation device 100 will be described with reference to FIG. FIG. 5 is a flow chart showing one operation of the configuration example of the ultraviolet light irradiation device shown in FIGS.

The axial direction of the bar 2 is detected (step ST1). Specifically, it detects whether the axial direction of the bar 2 is the vertical direction or the direction in which the straight line A1 inclined with respect to the vertical line Z1 extends.

Subsequently, irradiation of ultraviolet light by the light source 4 is controlled based on the axial direction of the bar 2 (step ST2). Specifically, when the axial direction of the bar 2 is the same as the direction in which the vertical line Z1 extends, the light source control unit 6 keeps the ultraviolet light irradiation from the light source 4 stopped without starting it. In such a case, the user is not holding the bar 2 . The light source control unit 6 keeps the ultraviolet light irradiation from the light source 4 stopped until the user H1 grips the bar 2 .

After that, the user H1 grips the bar 2. The axial direction of the bar 2 becomes the same as the direction in which the straight line A1 extends, and the light source control unit 6 causes the light source 4 to start irradiating ultraviolet light. Therefore, by gripping the bar 2, the user H1 can start irradiating the ultraviolet light from the light source 4 without requiring any other operation. Also, the user H1 can hold the bar 2 to move the ultraviolet light irradiation device 100 to a desired position, and the ultraviolet light from the light source 4 can be irradiated to the desired position.

As described above, according to the configuration described above, the irradiation by the light source 4 is controlled based on the axial direction of the bar 2 . The axial direction of the bar 2 tends to indicate whether or not the user is operating the ultraviolet light irradiation device 100 . Therefore, when the user starts operating the ultraviolet light irradiation device 100, irradiation of ultraviolet light by the light source 4 can be started without performing any other operation. Therefore, it is possible to efficiently irradiate an object to be irradiated with ultraviolet light. In addition, since the ultraviolet light irradiation by the light source 4 is started when the user starts operating the ultraviolet light irradiation device 100, the ultraviolet light is not irradiated except during the operation. This can improve safety.

In addition, the ultraviolet light irradiation device 100 can be used in various places both indoors and outdoors. Such locations include, for example, offices, daycare centers, nursing homes, karaoke boxes, stadiums, and the like. Stadiums are diverse, and specifically include gymnasiums, arenas, martial arts halls, and the like.

Next, an example of part of the ultraviolet light irradiation device 100 according to the first embodiment will be described with reference to FIG. FIG. 6 is a schematic cross-sectional view showing a partial cross-section of one configuration example of the ultraviolet light irradiation device shown in FIGS. 1 to 3. FIG.

A holding portion 1 a shown in FIG. 6 is a specific example of the holding portion 1 . The holding portion 1 a includes a housing 11 , a bottom portion 12 and an elastic body 13 .

The housing 11 has an opening 11a and a ceiling 11b. The opening 11 a opens downward in the housing 11 . The ceiling portion 11 b is provided on the upper portion of the housing 11 . The housing 11 is preferably made of a material having a property of blocking ultraviolet light. If the housing 11 is made of a material that blocks ultraviolet light, it may be possible to prevent the ultraviolet light L1a from the light source 4 from leaking from the top surface or side surfaces of the housing 11 .

The bottom part 12 is a plate-like body that is arranged in the opening 11a of the housing 11 and closes the opening 11a. The bottom part 12 is made of a material that has the property of transmitting ultraviolet light. Since the bottom portion 12 is made of a material that transmits ultraviolet light, the ultraviolet light L1a from the light source 4 can be emitted downward from the bottom surface of the housing 11 . In addition, when there is an obstacle on the floor, the bottom 12 hits the obstacle, thereby preventing the obstacle from hitting the light source 4 . That is, the light source 4 can be protected.

The elastic body 13 is provided below the ceiling portion 11b. The ceiling portion 11 b suspends the light source 4 via the elastic body 13 . An example of the elastic body 13 is a suspension. In addition, when there is an obstacle on the floor, even if the obstacle hits the light source 4, the elastic body 13 shrinks and absorbs the impact of the obstacle. By this, the protection of the light source 4 can be aimed at.

Here, the light source 4 emits ultraviolet light L1a. Then, since the bottom portion 12 is made of a material having a property of transmitting ultraviolet light, the ultraviolet light L1a is transmitted through the bottom portion 12 . The ultraviolet light L1a that has passed through the bottom portion 12 is irradiated downward from the bottom portion 12 .

(One operation example)
Further, the light source control unit 6 shown in FIG. 4 may perform the following control in addition to controlling the irradiation by the light source 4 described above. As shown in FIG. 7, when the axial direction of the bar 2 is horizontal, the light source control unit 6 stops the irradiation of the ultraviolet light by the light source 4 .

Specifically, once the user grips the bar 2, the light source control unit 6 causes the light source 4 to start irradiating ultraviolet light. The user stops the irradiation of ultraviolet light from the light source 4 by releasing the bar 2 without performing any other operation. Even if the user releases the bar 2 to stop the operation of the ultraviolet light irradiation device 100, the ultraviolet light is not continued to be irradiated. Therefore, useless irradiation of ultraviolet light can be prevented, and a decrease in the efficiency of ultraviolet light irradiation by the light source 4 can be suppressed. Even if the axial direction of the bar 2 is the same as the direction in which the vertical line Z1 extends, the light source control unit 6 stops the ultraviolet light irradiation from the light source 4 when the user releases the bar 2. You may let In such a case, the ultraviolet light irradiation device 100 may further include, for example, a gripping detection sensor that detects that the user is gripping the bar 2 . The grip detection sensor is provided near the tip of the bar 2 . The light source control unit 6 controls irradiation of ultraviolet light by the light source 4 based on the result of the grip detection sensor detecting gripping of the bar 2 by the user. Specifically, when the grip detection sensor detects that the user is gripping the bar 2 , the light source control unit 6 starts the ultraviolet light irradiation from the light source 4 . When the gripping detection sensor no longer detects gripping of the bar 2 by the user, the light source control unit 6 stops the ultraviolet light irradiation from the light source 4 . As a result, since the user does not hold the bar 2 and the ultraviolet light is not emitted from the light source 4, safety can be ensured.

(Embodiment 2)
Embodiment 2 of the present disclosure will be described with reference to FIGS. 8 to 10. FIG. FIG. 8 is a perspective view showing a configuration example of an ultraviolet light irradiation device according to a second embodiment. FIG. 9 is a schematic cross-sectional view showing a cross section of a part of one structural example of the ultraviolet light irradiation device shown in FIG. FIG. 10 is a block configuration diagram showing an example of a control system of the ultraviolet light irradiation device shown in FIG.

The ultraviolet light irradiation device 200 shown in FIG. 8 has the same configuration as the ultraviolet light irradiation device 100 shown in FIGS. Prepare. Furthermore, as shown in FIG. 10 , the ultraviolet light irradiation device 200 includes a floor distance sensor 23 , a motion sensor 24 , a speed detection section 25 , a notification section 26 and an opening/closing device 27 .

The authentication unit 21 acquires the user's biometric information that can be used for biometric authentication. The biometric information of the user is, for example, the user's fingerprint, voice, iris, face, etc., and may be one of them or a combination of a plurality of them. The authentication unit 21 is provided near the tip of the bar 2, for example.

The three-dimensional camera 22 is provided in front of the holding section 1, for example. The three-dimensional camera 22 can capture an image of the area in front of the ultraviolet light irradiation device 100 and obtain imaging information in the captured imaging area. The imaging information includes depth information. The three-dimensional camera 22 preferably captures an image of the irradiated surface in front of the ultraviolet light irradiation device 100 .

A holding portion 1b shown in FIG. 9 is a modified example of the holding portion 1a shown in FIG. The holding portion 1b includes a housing 211 and an ultraviolet light transmitting plate 12a.

The housing 211 has the same configuration as the housing 11 shown in FIG. 6 except for the opening/closing portion 11c. The opening/closing portion 11c is provided on the front side of the holding portion 1b so as to be able to be opened and closed. An example of the opening/closing portion 11c shown in FIG. 9 rotates around the rotation axis Y2 to open and close the front portion of the holding portion 1b. For convenience of explanation, the opening/closing portion 11c shown in FIG. 8 is closed, and the opening/closing portion 11c shown in FIG. 9 is open. Moreover, although the rotation axis Y2 extends in the Y-axis direction, it may extend in the Z-axis direction, for example. Further, the opening/closing portion 11 c may be opened and closed by translationally moving on the front surface of the holding portion 1 .

The ultraviolet light transmitting plate 12a is arranged in an opening in which the opening/closing portion 11c is open to the front of the holding portion 1b. The ultraviolet light transmission plate 12a closes the opening. The ultraviolet light transmitting plate 12a is made of a material having a property of transmitting ultraviolet light.

The ceiling part 11b suspends the light source 4a via the elastic body 13. The light source 4a is arranged between the light source 4 and the ultraviolet light transmitting plate 12a. The light source 4 a has the same configuration as the light source 4 . The light source 4a is provided in the holding portion 1b so as to be able to irradiate the ultraviolet light L1a toward the front of the holding portion 1 (here, the X-axis plus side). In addition, the ultraviolet light irradiation device 200 may include a light source rotation device for rotating the light source 4 instead of the light source 4a. By rotating the light source 4 with the light source rotating device, the light source 4 can irradiate the ultraviolet light L1a toward the front of the holding portion 1 .

Next, the control system of the ultraviolet light irradiation device 200 will be described with reference to FIG.

As shown in FIG. 10, the ultraviolet light irradiation device 200 includes a bar axial direction detector 5, an authentication unit 21, a three-dimensional camera 22, a floor distance sensor 23, a human sensor 24, and a speed detector 25. , a notification unit 26, an opening/closing device 27, and a control unit 10a.

The control unit 10 a includes a light source control unit 6 , a floor separation determination unit 31 , a movement start determination unit 32 , a user identification unit 33 , an illuminated surface detection unit 34 , and a notification control unit 35 .

The floor surface distance sensor 23 measures the distance between the holding unit 1 shown in FIGS. 1-4 and the floor surface. At least one floor distance sensor 23 is provided on the lower side of the holding portion 1, for example. When a plurality of floor surface distance sensors 23 are provided on the lower side of the holding portion 1, even if they are arranged at predetermined intervals on the bottom surface of the holding portion 1 (here, a plane along the XY plane). Alternatively, they may be arranged at a plurality of points arranged on a polygon.

The human detection sensor 24 may be any sensor that detects the presence of a person in the irradiation direction of the ultraviolet light from the light source 4 .

The speed detection unit 25 may detect the moving speed of the ultraviolet light irradiation device 200 with respect to the floor surface.

The notification unit 26 notifies the user of the ultraviolet light irradiation device 200 of a warning using sound, a light source, an image by a display device, or the like. The light source is, for example, an LED (light emitting diode) or an indicator lamp. The notification unit 26 may notify the user of the ultraviolet light irradiation device 200 of the warning by blinking the LED.

The opening/closing device 27 uses a drive source to open/close the opening/closing portion 11c of the holding portion 1 around the rotation axis Y2.

The floor separation determination unit 31 determines whether the ultraviolet light irradiation device 200 is separated from the floor based on the distance between the holding unit 1 and the floor measured by the floor distance sensor 23 . Specifically, when the distance between the holding unit 1 and the floor measured by the floor distance sensor 23 exceeds a predetermined distance, the floor separation determination unit 31 determines that the ultraviolet light irradiation device 200 is separated from the floor. I judge. In addition, when there are a plurality of floor distance sensors 23, the floor separation determination unit 31 determines if the difference in distance between the holding unit 1 and the floor measured by each of the plurality of floor distance sensors 23 exceeds a predetermined distance. , it may be determined that the ultraviolet light irradiation device 200 is separated from the floor surface. Further, the floor surface distance sensor 23 may be, for example, a simple switch that functions when the ultraviolet light irradiation device 200 is separated from the floor surface. When the switch is turned on, for example, the current line is connected and the electrical circuit is conducted. Also, when the switch is turned off, the electric line is cut off and the electric circuit is not conducted. The floor surface distance sensor 23 determines whether or not the ultraviolet light irradiation device 200 is separated from the floor surface according to the conduction of the electric circuit.

When the floor separation determination unit 31 determines that the ultraviolet light irradiation device 200 is separated from the floor surface, the light source control unit 6 stops the ultraviolet light irradiation by the light source 4 . The ultraviolet light irradiation device 200 may be separated from the floor surface by, for example, lifting the ultraviolet light irradiation device 200 by the user or running over an obstacle or the like. In such a case, irradiation of ultraviolet light by the light source 4 can be stopped without requiring any other operation. Thereby, it is possible to prevent the ultraviolet light from the light source 4 from irradiating a person.

The light source control unit 6 controls irradiation of ultraviolet light by the light source 4 based on the result detected by the human sensor 24 . For example, when the human sensor 24 detects the presence of a person in the direction in which the light source 4 emits ultraviolet light, the light source control unit 6 stops the ultraviolet light emitted from the light source 4 . Thereby, it is possible to prevent the ultraviolet light from the light source 4 from irradiating a person.

The movement start determination unit 32 determines whether or not the movement of the ultraviolet light irradiation device 200 has started based on the movement speed of the ultraviolet light irradiation device 200 detected by the speed detection unit 25 . For example, when the movement start determination unit 32 determines that the movement of the ultraviolet light irradiation device 200 has started, the light source control unit 6 causes the light source 4 to start irradiation of ultraviolet light. As a result, the user can irradiate ultraviolet light from the light source 4 simply by holding the bar 2 and moving the ultraviolet light irradiation device 200 without performing any other operation.

The light source control unit 6 controls the irradiation amount of ultraviolet light from the light source 4 according to the moving speed of the ultraviolet light irradiation device 200 detected by the speed detection unit 25 . Specifically, when the moving speed is high, the amount of ultraviolet light emitted from the light source 4 per unit time is increased so that the total amount of ultraviolet light emitted to the floor is constant. When the moving speed is low, the irradiation amount of ultraviolet light from the light source 4 per unit time is reduced. By increasing or decreasing the irradiation time of the light source 4 per unit time, or by increasing or decreasing the number of the light sources 4 that irradiate when there are a plurality of light sources 4, the irradiation amount of the ultraviolet light from the light source 4 can be adjusted. can. Further, there is a case where the moving speed is approximately 0 (zero), the ultraviolet light irradiation device 200 is stopped, and the ultraviolet light is irradiated for a certain period of time. In such a case, the irradiation is continued until the amount of ultraviolet light irradiation reaches the amount necessary for virus suppression, and the irradiation is stopped after the amount of ultraviolet light irradiation reaches the amount necessary for virus suppression. do. This leads to the effect of suppressing the influence of irradiation of ultraviolet light on the surface to be irradiated.

The notification control unit 35 causes the notification unit 26 to notify the user of a warning when the moving speed of the ultraviolet light irradiation device 200 detected by the speed detection unit 25 exceeds a predetermined value. The content of the warning indicates, for example, that the moving speed of the ultraviolet light irradiation device 200 should be suppressed. As a result, it is possible to prevent the ultraviolet light irradiation device 200 from moving too fast and the total irradiation amount of the ultraviolet light being insufficient.

The user identification unit 33 acquires biological information of the valid user of the ultraviolet light irradiation device 200 in advance. The user identification unit 33 compares the biometric information of the user acquired by the authentication unit 21 and the biometric information of the valid user of the ultraviolet light irradiation device 200, and determines whether or not the user acquired by the authentication unit 21 is valid. do. When the user identification unit 33 determines that the user acquired by the authentication unit 21 is not valid, the light source control unit 6 stops the ultraviolet light irradiation from the light source 4 . This allows only authorized users to use the ultraviolet light irradiation device 200 and prevents unauthorized users from using the ultraviolet light irradiation device 200 .

The irradiated surface detection unit 34 detects at least one of the material of the floor surface, the state of the floor surface, the inclination of the floor surface, and the characteristics of the floor surface, based on the imaging information captured by the three-dimensional camera 22 .

The light source control unit 6 controls the irradiation amount of ultraviolet light from the light source 4 based on the results of the detection of the material of the floor surface by the irradiated surface detection unit 34 . Specifically, when the material of the floor surface detected by the irradiated surface detection unit 34 is susceptible to the influence of ultraviolet light, the light source control unit 6 reduces the irradiation amount of ultraviolet light from the light source 4 . When the material of the floor surface detected by the irradiated surface detection unit 34 changes color when irradiated with ultraviolet light, the light source control unit 6 stops the irradiation of the ultraviolet light from the light source 4 . The light source control unit 6 causes the light source 4 to start or stop irradiation of ultraviolet light based on the result of detection of at least one of the inclination of the floor surface and the characteristics of the floor surface by the irradiated surface detection unit 34 .

The notification control unit 35 causes the notification unit 26 to notify the user that irradiation is not suitable based on the result of the detection of the state of the floor surface by the irradiation surface detection unit 34 . The content of the warning indicates that the material constituting the surface to be irradiated is likely to discolor when exposed to ultraviolet light or that it is not suitable for ultraviolet light irradiation.

The opening/closing control unit 36 causes the opening/closing device 27 to open/close the opening/closing unit 11c based on the result of the detection of the inclination of the floor or the characteristics of the floor by the illuminated surface detection unit 34 . For example, when the inclination of the floor detected by the irradiated surface detection unit 34 or the characteristics of the floor indicate the edge of the floor surface in contact with the wall, the opening/closing control unit 36 causes the opening/closing device 27 to open the opening/closing portion 11c. Further, the light source control unit 6 causes the light source 4a to emit ultraviolet light. As a result, it is possible to irradiate the ultraviolet light even on the wall rising from the edge of the floor surface. Further, by arranging the light source 4a so that the ultraviolet light can be irradiated obliquely downward, the ultraviolet light can be irradiated onto the floor obliquely downward from the ultraviolet light irradiation device 200 . Similarly, by using a material that reflects ultraviolet light on the inner wall surface of the opening/closing portion 11c, or applying a coating that reflects ultraviolet light, and by making the opening/closing angle oblique instead of horizontal, the light emitted from the light source 4a It is also possible to reflect the ultraviolet light from the opening and closing portion 11c on the inner wall surface of the opening/closing portion 11c, and irradiate the ultraviolet light onto the floor obliquely downward of the ultraviolet light irradiation device 200. FIG.

(Embodiment 3)
Embodiment 3 of the present disclosure will be described with reference to FIGS. 11 and 12. FIG. FIG. 11 is a perspective view showing a configuration example of an ultraviolet light irradiation device according to a third embodiment; FIG. 12 is a block configuration diagram showing the control system of the ultraviolet light irradiation device shown in FIG.

Although the operation of the ultraviolet

light irradiation devices

100 and 200 described above was performed manually, this operation may be performed by an AGV (Automatic Guided Vehicle). As shown in FIG. 11, the ultraviolet light irradiation device 300 is mounted on an AGV900. The AGV 900 moves by autonomously controlling the moving mechanism 93 . The ultraviolet light irradiation device 300 includes a three-dimensional camera 22, a holding portion 1b, a light source 4, and a light source 4a. The ultraviolet light irradiation device 300 controls irradiation of ultraviolet light by the

light sources

4 and 4a. Note that the ultraviolet light irradiation device 300 may not include the bar 2 and the authentication unit 21, unlike the ultraviolet light irradiation device 200 shown in FIG.

As shown in FIG. 12, the ultraviolet light irradiation device 300 includes a controller 10b. The control unit 10 b includes a light source control unit 6 .

The AGV 900 includes a moving mechanism 93 , a speed detection section 94 and a control section 90 . The controller 90 includes an ultraviolet light irradiation device controller 91 and an autonomous movement controller 92 . The ultraviolet light irradiation device control section 91 may control the control section 10 b of the ultraviolet light irradiation device 300 . The autonomous movement control unit 92 autonomously moves the ultraviolet light irradiation device 300 by controlling the movement mechanism 93 .

The ultraviolet light irradiation device control section 91 may control the control section 10 b and the light source control section 6 of the ultraviolet light irradiation device 300 . The light source control unit 6 may control the irradiation amount of ultraviolet light from the light source 4 according to the moving speed of the ultraviolet light irradiation device 200 detected by the speed detection unit 94 .

8 to 10, the ultraviolet light irradiation device 300 includes a three-dimensional camera 22, a floor distance sensor 23, a human sensor 24, an opening/closing device 27, and a floor separation determination unit. 31, an illuminated surface detection unit 34, and the like may be provided as appropriate. Moreover, the ultraviolet light irradiation device 300 may have the same configuration as the AGV 900 , or the AGV 900 may have the same configuration as the ultraviolet light irradiation device 300 .

(Embodiment 4)
Embodiment 4 of the present disclosure will be described with reference to FIGS. 14 and 15. FIG. FIG. 14 is a perspective view showing a configuration example of an ultraviolet light irradiation device according to a fourth embodiment. 15 is a perspective view showing a modified example of the ultraviolet light irradiation device shown in FIG. 14. FIG.

As shown in FIG. 14, the ultraviolet light irradiation device 500 includes a holding portion 1, a bar 52, and a light source 4.

The bar 52 has the same configuration as the bar 2 shown in FIG. 1 except for its length in the axial direction (here, the Z-axis direction). The length of the bar 52 in the axial direction is preferably set so that the user can easily change the orientation and move the ultraviolet light irradiation device 500 by gripping the bar 52 . The axial length of the bar 52 is shorter than the axial length of the bar 2 . The bar 52 according to this embodiment is rotatable to the rear of the ultraviolet light irradiation device 500 (here, the minus side of the X axis).

Note that the ultraviolet light irradiation device 500 does not require the moving mechanism 3, unlike the ultraviolet light irradiation device 100 shown in FIG. The ultraviolet light irradiation device 500 may include a moving mechanism 3, like the ultraviolet light irradiation device 100 shown in FIG. By gripping and moving the bar 52 , the user changes the orientation of the ultraviolet light irradiation device 500 or moves the ultraviolet light irradiation device 500 . Thereby, the user can move the ultraviolet light irradiation device 500 to a desired position on an object to be irradiated, for example, a desk or a wall surface. It is preferable that the ultraviolet light irradiation device 500 is lighter and smaller than the ultraviolet light irradiation device 100 so that the user can easily move the ultraviolet light irradiation device 500 .

Also, the control system of the ultraviolet light irradiation device 500 preferably has the same configuration as the example of the control system of the ultraviolet light irradiation device 100 shown in FIG. The ultraviolet light irradiation device 500 includes a control section 10 and a bar axial direction detection section 5 . The control unit 10 preferably includes a light source control unit 6 .

As described above, according to the configuration described above, similarly to the ultraviolet light irradiation device 100 , irradiation by the light source 4 is controlled based on the axial direction of the bar 52 . The axial direction of the bar 52 tends to indicate whether or not the user is operating the ultraviolet light irradiation device 500 . Therefore, when the user starts operating the ultraviolet light irradiation device 500, the ultraviolet light irradiation by the light source 4 can be started without performing any other operation. Therefore, it is possible to efficiently irradiate an object to be irradiated with ultraviolet light. Further, similarly to the ultraviolet light irradiation device 100, when the user starts operating the ultraviolet light irradiation device 500, the ultraviolet light irradiation by the light source 4 is started. This can improve safety.

In addition, the ultraviolet light irradiation device 500 can be used in various places both indoors and outdoors, like the ultraviolet light irradiation device 100. At these places, the user can move the ultraviolet light irradiation device 500 to a desired position on an object to be irradiated, for example, a desk or a wall surface. Therefore, the ultraviolet light irradiation device 500 can irradiate an object to be irradiated, such as a tabletop or a wall surface, with ultraviolet light.

8 to 10, the ultraviolet light irradiation device 500 is appropriately equipped with a three-dimensional camera 22, a human sensor 24, an opening/closing device 27, an irradiated surface detection unit 34, and the like. may

(one modification)
As a modified example of the ultraviolet light irradiation device 500, there is an ultraviolet light irradiation device 500a shown in FIG. The ultraviolet light irradiation device 500 a has the same configuration as the ultraviolet light irradiation device 500 except for the bar 62 . The ultraviolet light irradiation device 500 a includes a holding portion 1 , a bar 62 and a light source 4 .

The axial length of the bar 62 is shorter than the axial length of the bar 2 shown in FIG. The bar 62 is provided on the holding portion 1 so as not to rotate with respect to the holding portion 1 . An example of the holding portion 1 shown in FIG. 15 is a substantially rectangular parallelepiped. The axis of the bar 62 extends vertically (here, Z-axis direction), horizontally (here, along the XY plane), or along a straight line A2 inclined with respect to the vertical line Z1. The angle β formed by the intersection of the axis of the bar 62 and the vertical line Z1 is within a predetermined range, for example, 0 degrees or more and 90 degrees or less. If the angle β is 0 degrees, the axis of the bar 62 extends vertically. For example, as shown in FIG. 16, if the angle β is 90 degrees, the axis of bar 62 extends horizontally.

Note that the control system of the ultraviolet light irradiation device 500a does not need to include the bar axial direction detection unit 5, unlike the example of the control system of the ultraviolet light irradiation device 500 shown in FIG.

As described above, according to the above-described configuration, the ultraviolet light irradiation device 500a can be used in various places, both indoors and outdoors, like the ultraviolet light irradiation device 500. In these places, the user can move the ultraviolet light irradiation device 500a to a desired position on an object to be irradiated, for example, a desk or a wall surface. Therefore, it is possible to irradiate an object to be irradiated, such as a tabletop or a wall surface, with ultraviolet light.

(Other embodiments, etc.)
In addition, the ultraviolet light irradiation device according to the above embodiment can have the following hardware configuration. FIG. 13 is a diagram illustrating an example of a hardware configuration included in an ultraviolet light irradiation device; In the various embodiments described above, the present disclosure can also take the form of a processing method, as the procedure of processing in the ultraviolet light irradiation device has been described.

The ultraviolet light irradiation device 400 shown in FIG. 13 includes a processor 401 and a memory 402 along with an interface 403 . The control configuration (see FIG. 1) of the ultraviolet

light irradiation devices

100, 200, and 300 described in the above embodiments is realized by the processor 401 reading and executing the control program stored in the memory 402. FIG. That is, this program is a program for causing the processor 401 to function as the ultraviolet

light irradiation device

100, 200, 300, or a part thereof.

A program includes a group of instructions (or software code) that, when read into a computer, cause the computer to perform one or more of the functions described in the embodiments. The program may be stored in a non-transitory computer-readable medium or tangible storage medium. By way of example, and not limitation, computer readable media or tangible storage media may include random-access memory (RAM), read-only memory (ROM), flash memory, solid-state drives (SSD) or other memory technology, CDs - ROM, digital versatile disc (DVD), Blu-ray disc or other optical disc storage, magnetic cassette, magnetic tape, magnetic disc storage or other magnetic storage device. The program may be transmitted on a transitory computer-readable medium or communication medium. By way of example, and not limitation, transitory computer readable media or communication media include electrical, optical, acoustic, or other forms of propagated signals.

It should be noted that the present disclosure is not limited to the above embodiments, and can be modified as appropriate without departing from the scope. For example, each configuration of the ultraviolet light irradiation devices according to Embodiments 1 to 3 may be combined. Moreover, although the ultraviolet light irradiation device 100 shown in FIGS. 1 and 2 includes the bar axial direction detection unit 5, it may include a bar position detection unit. The bar position detector may include a switch and an electric circuit. The switch switches between ON and OFF depending on the position of the bar 2 . When the switch is turned on, the conducting line is connected and the electric circuit is conducted. When the switch is turned off, the conducting line is cut and the electric circuit is not conducted. The bar position detection unit detects the position of the bar 2 according to the conduction of the electric circuit.

This application is based on priority benefit based on International Application No. PCT/JP2021/017604 filed on May 7, 2021, the disclosure of which is incorporated herein by reference in its entirety.

Some or all of the above-described embodiments can also be described in the following supplementary remarks, but are not limited to the following.
(Appendix 1)
a light source that emits ultraviolet light;
a holding unit that holds the light source so that the light source can irradiate the floor surface with the ultraviolet light;
a bar that is rotatably provided on the holding portion and that can be gripped by a user;
a moving mechanism that movably supports the holding part on the floor,
a bar axial direction detection unit for detecting the axial direction of the bar;
a light source control unit that controls irradiation by the light source based on the detected axial direction of the bar;
Ultraviolet light irradiation device.
(Appendix 2)
a light source that emits ultraviolet light;
a holding unit that holds the light source so that the light source can irradiate the ultraviolet light;
a bar that is rotatably provided on the holding part and that can be gripped by a user;
a bar axial direction detection unit for detecting the axial direction of the bar;
a light source control unit that controls irradiation by the light source based on the detected axial direction of the bar;
Ultraviolet light irradiation device.
(Appendix 3)
When the bar axial direction detection unit detects that the axial direction of the bar is along a straight line inclined with respect to a vertical line, the light source control unit starts irradiation of the light source.
The ultraviolet light irradiation device according to Supplementary Note 1 or Supplementary Note 2, characterized by:
(Appendix 4)
When the bar axial direction detection unit detects that the axial direction of the bar is horizontal, the light source control unit stops the irradiation of the light source.
The ultraviolet light irradiation device according to any one of appendices 1 to 3, characterized in that:
(Appendix 5)
further comprising a floor separation determination unit that determines whether the ultraviolet light irradiation device is separated from the floor;
When the floor separation determination unit determines that the ultraviolet light irradiation device is separated from the floor surface, the light source control unit stops the irradiation of the light source.
The ultraviolet light irradiation device according to Supplementary Note 1, characterized by:
(Appendix 6)
Further comprising a human sensor that detects the presence of a person in the irradiation direction in which the light source irradiates the ultraviolet light,
When the human sensor detects the presence of a person in the irradiation direction in which the light source irradiates the ultraviolet light, the light source control unit stops the irradiation of the light source.
The ultraviolet light irradiation device according to any one of appendices 1 to 5, characterized in that:
(Appendix 7)
further comprising a speed detection unit that detects the speed of movement of the holding unit by the moving mechanism;
The light source control unit controls the irradiation amount of ultraviolet light from the light source according to the detected speed of movement of the holding unit,
The ultraviolet light irradiation device according to Supplementary Note 1, characterized by:
(Appendix 8)
Further equipped with a notification part,
When the speed of movement of the holding unit detected by the speed detection unit exceeds a predetermined value, the notification unit notifies the user of a warning.
The ultraviolet light irradiation device according to appendix 7, characterized by:
(Appendix 9)
further comprising a movement start determination unit that determines whether or not the movement of the holding unit has started based on the movement speed detected by the speed detection unit;
When the movement start determination unit determines that the movement of the holding unit has started, the light source control unit causes the light source to start irradiation.
The ultraviolet light irradiation device according to appendix 7, characterized by:
(Appendix 10)
Further comprising a user identification unit that identifies the user by biometric authentication of the user and determines whether it is valid,
When the user identification unit identifies the user and determines that the user is not valid, the light source control unit stops the irradiation of the light source.
The ultraviolet light irradiation device according to any one of appendices 1 to 9, characterized in that:
(Appendix 11)
The holding section holds the light source via an elastic body.
The ultraviolet light irradiation device according to any one of appendices 1 to 10, characterized in that:
(Appendix 12)
The ultraviolet light emitted by the light source has a predetermined wavelength range that can be confirmed with the naked eye,
The ultraviolet light irradiation device according to any one of appendices 1 to 11, characterized in that:
(Appendix 13)
Further comprising an irradiated surface detection unit that detects at least one of the material of the floor surface, the condition of the floor surface, the inclination of the floor surface, and the characteristics of the floor surface,
The ultraviolet light irradiation device according to Supplementary Note 1, characterized by:
(Appendix 14)
The light source control unit controls the irradiation amount of ultraviolet light from the light source based on the result of the detection of the material of the floor surface by the irradiated surface detection unit.
The ultraviolet light irradiation device according to appendix 13, characterized by:
(Appendix 15)
The notification unit notifies the user that the irradiation is not suitable based on the result of the detection of the state of the floor surface by the irradiation surface detection unit.
The ultraviolet light irradiation device according to appendix 13, characterized by:
(Appendix 16)
The light source control unit causes the light source to start or stop irradiation of ultraviolet light based on the result of detection of at least one of the inclination of the floor surface and the characteristics of the floor surface by the irradiated surface detection unit. ,
The ultraviolet light irradiation device according to appendix 13, characterized by:
(Appendix 17)
further comprising a light source rotating device for rotating the light source,
When the tilt of the floor surface detected by the irradiated surface detection unit or the characteristics of the floor surface indicate an end of the floor surface in contact with a wall, the light source rotating device detects that the light source emits ultraviolet light from the wall. rotating the light source so that it illuminates toward
The ultraviolet light irradiation device according to appendix 15, characterized in that:
(Appendix 18)
a switchgear;
and an opening/closing control unit,
The holding section includes an opening and closing section provided in front of the light source so as to be openable and closable,
When the inclination of the floor surface detected by the illuminated surface detection unit or the characteristics of the floor surface indicates an edge of the floor surface in contact with a wall, the opening/closing control unit allows the light emitted from the light source to pass through. causing the opening and closing device to open the opening and closing part,
The ultraviolet light irradiation device according to appendix 17, characterized by:
(Appendix 19)
a light source that emits ultraviolet light;
a holding unit that holds the light source so that the light source can irradiate the floor surface with the ultraviolet light;
a moving mechanism that movably supports the holding part on the floor;
an autonomous movement control unit that controls the movement mechanism to autonomously move the holding unit;
a light source control unit that controls irradiation by the light source;
a speed detection unit that detects the movement speed of the movement;
A light source control unit that controls the irradiation amount of ultraviolet light from the light source according to the moving speed detected by the speed detection unit,
Ultraviolet light irradiation device.
(Appendix 20)
a light source that emits ultraviolet light;
a holding unit that holds the light source so that the light source can irradiate the floor surface with the ultraviolet light;
a bar that is rotatably provided on the holding portion and that can be gripped by a user;
In an ultraviolet light irradiation method applicable to an ultraviolet light irradiation device comprising a moving mechanism that movably supports the holding part on the floor surface,
sensing the axial orientation of the bar;
controlling illumination by the light source based on the sensed axial orientation of the bar;
Ultraviolet light irradiation method.
(Appendix 21)
a light source that emits ultraviolet light;
a holding unit that holds the light source so that the light source can irradiate the floor surface with the ultraviolet light;
a bar that is rotatably provided on the holding portion and that can be gripped by a user;
a moving mechanism that movably supports the holding part on the floor;
A computer that operates as a light source control unit of an ultraviolet light irradiation device that includes a bar axial direction detection unit that detects the axial direction of the bar,
obtaining the axial direction of the bar;
and controlling illumination by the light source based on the obtained axial direction of the bar.
A non-transitory computer-readable medium that stores a program.
(Appendix 22)
a light source that emits ultraviolet light;
a holding unit that holds the light source so that the light source can irradiate the ultraviolet light;
a bar provided in the holding part and capable of being gripped by a user;
Ultraviolet light irradiation device.

100, 200, 300, 400 Ultraviolet

light irradiation device

1, 1a, 1b Holding part 2 Bar 3

Moving mechanism

4, 4a Light source 5 Bar axial direction detection part 6 Light

source control part

10, 10a,

10b Control part

11, 211 Housing

11a Opening portion

11b Ceiling portion 11c Opening/closing portion 12 Bottom portion 12a Ultraviolet light transmission plate 13 Elastic body 21 Authentication unit 22 Three-dimensional camera 23 Floor distance sensor 24 Human sensor 25 Speed detection unit 26 Notification unit 27 Switching device 31 Floor separation determination unit 32 movement start determination unit 33 user identification unit 34 illuminated surface detection unit 35 notification control unit 36 opening/closing control unit 37 autonomous movement control unit 401 processor 402 memory 403 interface 900 AGV
90 control unit 91 ultraviolet light irradiation device control unit 92 autonomous movement control unit 93 movement mechanism 94 speed detection unit A1, A2 straight line H1 user L1a ultraviolet light ST1, ST2 steps Y1, Y2 rotation axis Z1 vertical line α, β angle

Claims

a light source that emits ultraviolet light;
a holding unit that holds the light source so that the light source can irradiate the floor surface with the ultraviolet light;
a bar that is rotatably provided on the holding portion and that can be gripped by a user;
a moving mechanism that movably supports the holding part on the floor,
a bar axial direction detection unit for detecting the axial direction of the bar;
a light source control unit that controls irradiation by the light source based on the detected axial direction of the bar;
Ultraviolet light irradiation device.
a light source that emits ultraviolet light;
a holding unit that holds the light source so that the light source can irradiate the ultraviolet light;
a bar that is rotatably provided on the holding part and that can be gripped by a user;
a bar axial direction detection unit for detecting the axial direction of the bar;
a light source control unit that controls irradiation by the light source based on the detected axial direction of the bar;
Ultraviolet light irradiation device.
When the bar axial direction detection unit detects that the axial direction of the bar is along a straight line inclined with respect to a vertical line, the light source control unit starts irradiation of the light source.
3. The ultraviolet light irradiation device according to claim 1 or 2, characterized in that:
When the bar axial direction detection unit detects that the axial direction of the bar is horizontal, the light source control unit stops the irradiation of the light source.
The ultraviolet light irradiation device according to any one of claims 1 to 3, characterized in that:
further comprising a floor separation determination unit that determines whether the ultraviolet light irradiation device is separated from the floor;
When the floor separation determination unit determines that the ultraviolet light irradiation device is separated from the floor surface, the light source control unit stops the irradiation of the light source.
The ultraviolet light irradiation device according to claim 1, characterized in that:
Further comprising a human sensor that detects the presence of a person in the irradiation direction in which the light source irradiates the ultraviolet light,
When the human sensor detects the presence of a person in the irradiation direction in which the light source irradiates the ultraviolet light, the light source control unit stops the irradiation of the light source.
The ultraviolet light irradiation device according to any one of claims 1 to 5, characterized in that:
further comprising a speed detection unit that detects the speed of movement of the holding unit by the moving mechanism;
The light source control unit controls the irradiation amount of ultraviolet light from the light source according to the detected speed of movement of the holding unit,
The ultraviolet light irradiation device according to claim 1, characterized in that:
Further equipped with a notification part,
When the speed of movement of the holding unit detected by the speed detection unit exceeds a predetermined value, the notification unit notifies the user of a warning.
The ultraviolet light irradiation device according to claim 7, characterized in that:
a light source that emits ultraviolet light;
a holding unit that holds the light source so that the light source can irradiate the floor surface with the ultraviolet light;
a bar that is rotatably provided on the holding portion and that can be gripped by a user;
In an ultraviolet light irradiation method applicable to an ultraviolet light irradiation device comprising a moving mechanism that movably supports the holding part on the floor surface,
sensing the axial orientation of the bar;
controlling illumination by the light source based on the sensed axial orientation of the bar;
Ultraviolet light irradiation method.
a light source that emits ultraviolet light;
a holding unit that holds the light source so that the light source can irradiate the floor surface with the ultraviolet light;
a bar that is rotatably provided on the holding portion and that can be gripped by a user;
a moving mechanism that movably supports the holding part on the floor;
A computer that operates as a light source control unit of an ultraviolet light irradiation device that includes a bar axial direction detection unit that detects the axial direction of the bar,
obtaining the axial direction of the bar;
and controlling illumination by the light source based on the obtained axial direction of the bar.
A non-transitory computer-readable medium that stores a program.