JP2021161778A - Opening/closing device - Google Patents

Abstract

The present invention provides an opening/closing device capable of suppressing ranging errors of a 3D camera. A shutter device (10) as an opening/closing device includes a frame (19) attached to a building, a shutter curtain (16) provided on the frame (19) for opening and closing an opening of the building (12), and a shutter device (10) attached to the frame (19) to photograph the periphery of the opening. A TOF camera 34 for photographing an area is provided, and the TOF camera 34 includes an imaging unit 40 for photographing the imaging area, a laser module 42 having a laser diode for irradiating light toward the imaging area, the imaging unit 40, and a camera case 28 that houses the laser module 42 and is attached to the frame 19, and a heat transfer member 46 that contacts the laser module 42 and the frame 19 and transfers heat generated by the laser diode to the frame 19. ing. [Selection drawing] Fig. 3

Description

The present invention relates to a switchgear.

An example of a switchgear is a shutter device.
As an example of this shutter device, there is a shutter device provided with a sensor capable of detecting an obstacle that interferes with the operation of the shutter curtain.
Further, as a sensor for detecting an object such as an obstacle, a 3D camera is known as a technique capable of measuring a distance to an object and outputting distance data.

As an example of a 3D camera that measures a distance to an object, a TOF (time of flight) camera that outputs a distance based on the flight time of light is known. The TOF camera is a phase difference method in which measurement light whose intensity is modulated in a predetermined cycle is irradiated from a light source toward the measurement target space, and the phase difference between the irradiated measurement light and the reflected light from an object in the measurement target space is detected. Many adopt.

Japanese Unexamined Patent Publication No. 2019-215260

It is conceivable to use a TOF camera as a sensor for detecting obstacles in a switchgear such as a shutter device.
In a TOF camera, a distance measurement error occurs due to a temperature change of an electronic element (for example, a light receiving element, an A / D conversion element, and other electronic components related to distance measurement), and the distance measurement error occurs due to an increase in temperature. May increase.
Further, in order to measure the distance to an object at a distant position by using a TOF camera, it is necessary to increase the intensity of the measurement light so that the measurement light reaches the object and receive the reflected light.
If the current flowing through the light source is increased in order to increase the intensity of the measurement light, the light source becomes hot, and the light receiving element or the like is affected by the heat of the light source, resulting in a large distance measurement error, which hinders the operation of the shutter curtain. There is a risk of causing it.

An object of the present invention is to provide a switchgear capable of suppressing a distance measurement error of a 3D camera.

The opening / closing device according to claim 1 comprises a frame attached around an opening of a building, an opening / closing member provided on the frame to open / close the opening, and a photographing area attached to the frame and around the opening. The 3D camera includes a 3D camera for photographing, the 3D camera includes an imaging unit for photographing the photographing area, a light source for irradiating light toward the photographing area, and the heat generated by the light source attached to the light source. It is configured to include a heat transfer member that transfers light to the frame.

In the opening / closing device according to claim 1, an opening / closing member of a building structure is opened / closed by an opening / closing member provided on the frame. A 3D camera is attached to the frame, and when the photographing area around the opening is photographed, the light source irradiates the light toward the photographing area. The heat generated by the light source due to the irradiation of light is transferred to the frame via the heat transfer member, and is dissipated from the frame to the atmosphere. A part of the heat generated by the light source can also be dissipated from the heat transfer member to the atmosphere. Since the frame of the switchgear has a larger surface area than the light source, the cooling effect of the light source is higher than when heat is dissipated from the light source, and the light source can be cooled efficiently.

Since the high temperature of the light source is suppressed, it is possible to suppress the influence of the heat of the light source on the imaging unit and the like, and it is possible to suppress the distance measurement error. Further, since the high temperature of the light source is suppressed, the durability of the light source can be improved.

It is preferable to use a metal material for the member that transfers heat.
In the switchgear according to claim 2, since the heat transfer member is made of a metal material, the heat transfer efficiency to the frame can be improved as compared with the case where the heat transfer member is made of a non-metal material.

The opening / closing device according to claim 3 comprises a frame attached around an opening of a building, an opening / closing member provided on the frame to open / close the opening, and a photographing area attached to the frame and around the opening. A 3D camera for shooting and a case for accommodating the 3D camera are provided, and the 3D camera is equipped with an imaging unit for shooting the shooting area, a light source for irradiating light toward the shooting area, and the light source. It is configured to include a heat transfer member that transfers heat generated by the light source to the frame via the case.

In the opening / closing device according to claim 3, the opening / closing of the building is opened / closed by the opening / closing member provided on the frame. A 3D camera is attached to the frame, and when the photographing area around the opening is photographed, the light source irradiates the light toward the photographing area. The heat generated by the light source due to the irradiation of light is transferred to the frame via the heat transfer member and the case, and is dissipated from the frame to the atmosphere. A part of the heat generated by the light source can also be dissipated to the atmosphere from the heat transfer member and the case. Since the frame of the switchgear has a larger surface area than the light source, the cooling effect of the light source is higher than when heat is dissipated from the light source, and the light source can be cooled efficiently.

Since the high temperature of the light source is suppressed, the image pickup unit is suppressed from being affected by the heat of the light source, and the distance measurement error can be suppressed. Further, since the high temperature of the light source is suppressed, the durability of the light source can be improved.

According to a fourth aspect of the present invention, in the switchgear according to the third aspect, at least one of the heat transfer member and the case is made of a metal material.

It is preferable to use a metal material for the member that transfers heat.
In the opening / closing device according to claim 4, since at least one of the heat transfer member and the case is made of a metal material, the heat transfer efficiency to the frame can be improved as compared with the case where both are made of a non-metal material. Can be enhanced.

The invention according to claim 5 is the opening / closing device according to any one of claims 1 to 4, wherein the opening / closing member is a shutter curtain, and the frame movably guides the shutter curtain. It is configured to include a guide rail and a shutter case provided at an end of the guide rail and accommodating a drive device for operating the shutter curtain.

In the switchgear according to claim 5, the 3D camera is attached to the guide rail or the shutter case constituting the frame, and the heat of the light source can be transmitted to the guide rail or the shutter case to dissipate heat.

The invention according to claim 6 is a drive device that operates the opening / closing member based on distance measurement information obtained from the 3D camera in the opening / closing device according to any one of claims 1 to 5. It is equipped with a control device to control.

In the switchgear according to claim 6, the control device can control the drive device based on the distance measurement information obtained by the 3D camera. Since the distance measurement error of the distance to the obstacle can be reduced, the opening / closing member can be operated based on accurate distance information.

According to the opening / closing device according to claim 1, an excellent effect that the distance measurement error of the 3D camera can be suppressed can be obtained.

It is a front view of the shutter device which concerns on embodiment of this invention. It is a side view of the shutter device which concerns on embodiment of this invention. It is sectional drawing which shows the internal structure of the obstacle detection camera provided in the shutter device which concerns on embodiment of this invention. It is sectional drawing which shows the internal structure of the obstacle detection camera provided in the shutter device which concerns on another Embodiment of this invention.

A shutter device 10 as an example of a switchgear according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.
As shown in FIGS. 1 and 2, the shutter device 10 is provided in an opening (not shown) which is an entrance / exit of a structure such as a building 12, and opens and closes along, for example, a pair of guide rails 14. The shutter curtain 16 as a member is opened and closed.

The guide rail 14 is fixed to a skeleton such as a wall of a building 12 on both the left and right sides of the opening. Both ends of the shutter curtain 16 in the width direction are slidably inserted into the guide rail 14, and are guided by the guide rail 14 to open and close.

The guide rail 14 of the present embodiment is made of a steel plate as an example. The guide rail 14 may be made of a metal material other than a steel plate, such as stainless steel or aluminum.

A shutter case 18 is provided on the upper part of the guide rail 14. The shutter case 18 is arranged so as to extend in the device width direction so as to connect the upper ends of the pair of guide rails 14. Then, in the shutter case 18, the cross section cut in the direction orthogonal to the device width direction is rectangular and the inside is hollow. The shutter case 18 of the present embodiment is made of a steel plate as an example. The shutter case 18 may be made of a metal material other than a steel plate, such as stainless steel or aluminum.

Inside the shutter case 18, the take-up shaft 20 is supported by a pair of left and right brackets (not shown) and is rotatably stored and arranged. The upper end of the shutter curtain 16 is coupled to the take-up shaft 20. When the shutter curtain 16 is wound around the take-up shaft 20, the opening is opened, and when the shutter curtain 16 is unwound from the take-up shaft 20, the opening is closed. The take-up shaft 20 is rotationally driven by the motor 22. The control of the motor 22 is performed by using the control device 24.
In the present embodiment, the frame 19 is composed of the guide rail 14 and the shutter case 18. Further, in the present embodiment, the drive device is composed of the take-up shaft 20, the motor 22, and the like.

(Obstacle detection device)
An obstacle detection device 26 capable of measuring the distance to the obstacle (subject) H is attached to the lower surface 18A of the shutter case 18 at the center in the width direction of the device. Examples of the obstacle H include people, animals, vehicles, bicycles, luggage, and the like, but the type is not particularly limited. The obstacle detection device 26 includes a camera case 28 made of a metal material. The camera case 28 includes a mounting base 28A attached to the lower surface 18A of the shutter case 18 with screws 30 and the like, and a box-shaped case body 28B attached to the mounting base 28A with screws 32 and the like.

Inside the camera case 28, a TOF camera 34 for ranging as a 3D camera, an IF (interface) 36, and the like are housed. The 3D camera can be rephrased as a 3D sensor, a depth sensor, a distance measuring sensor, and a distance camera capable of measuring the distance to an object.

The TOF camera 34 includes a light irradiation unit 38 and an image pickup unit 40. The light irradiation unit 38 is attached in contact with the laser module 42 that irradiates the laser beam toward the imaging region (the imaging region around the opening) of the TOF camera 34, the circuit board 44 on which the laser module 42 is mounted, and the laser module 42. It is provided with a heat transfer member 46 made of a metal material such as aluminum that receives heat from the laser module 42. The heat transfer member 46 of the present embodiment is bent into a U-shape, but may be bent into another shape such as a crank shape.

The heat transfer member 46 may be made of a material having high thermal conductivity such as aluminum, copper, or steel, and may be made of a material other than metal such as ceramics.

As an example, the laser module 42 has a laser diode (not shown) that emits infrared rays. The laser diode includes a connection terminal 42A that is electrically connected to the circuit board 44, and a current is supplied to the laser diode through the connection terminal 42A so that the laser diode emits light. The laser light emitted from the laser diode is emitted to the outside through the hole 48 formed in the case body 28B.

The laser module 42 and the heat transfer member 46 are electrically insulated by a known insulating heat conductor (not shown) that has insulating properties and transfers heat. The portion of the heat transfer member 46 opposite to the laser module 42 side is in surface contact with the lower surface 18A of the shutter case 18. The mounting base 28A is formed with an opening 49 for exposing the heat transfer member 46 to the outside.

The image pickup unit 40 has a camera module 50 and a substrate 52 on which the camera module 50 is mounted. The camera module 50 includes an image sensor 50A, a lens 50B, and the like. The camera module 50 is capable of photographing the outside through a hole 54 formed in the case body 28B. In addition to the camera module 50, electronic components (not shown) related to distance measurement are mounted on the substrate 52.

The TOF camera 34 and IF36 are mounted on the mounting base 28A. Further, the TOF camera 34 is electrically connected to the control device 24 via the IF36. Although the IF 36 is provided on the back surface side (shutter case 18 side) of the substrate 52, the IF 36 may be provided in another place.

The TOF camera 34 can measure the distance to the obstacle H near the opening which is the entrance / exit of the building 12, whereby the position, the moving direction, and the moving speed of the obstacle H can be grasped, and the obstacle H can be measured. Information regarding the position, the moving direction, and the moving speed can be transmitted to the control device 24.

As an example, when the control device 24 determines that the obstacle may come into contact with the shutter curtain 16 at the time of starting the unwinding of the shutter curtain 16 or during the unwinding, the control device 24 of the shutter curtain 16 Unwinding (closing operation) can be stopped.

(Action, effect)
Next, the operation and effect of the shutter device 10 of the present embodiment will be described.
The heat generated by the light emission of the laser diode is transferred to the shutter case 18 via the heat transfer member 46, and this heat is dissipated to the atmosphere from the heat transfer member 46 and the shutter case 18.

Since the shutter case 18 has a larger surface area than the camera case 28 accommodating the TOF camera 34, the cooling effect of the laser diode is higher than when heat is dissipated from the camera case 28, and the laser diode is efficiently cooled. can do.

Since the shutter case 18 can be used as a heat sink having a large surface area, the laser diode can be cooled without using a cooling fan or the like, which also saves energy.

Since the high temperature of the laser diode is suppressed, the heat of the laser diode affects the image pickup element 50A of the TOF camera 34 and electronic components related to distance measurement (for example, a decrease in the operating speed of the device). Is suppressed, the distance measurement error of the TOF camera 34 of the electronic component can be suppressed, and the distance detection accuracy can be stabilized.

Since the distance measurement error of the TOF camera 34 can be suppressed in this way, the position, moving direction, and moving speed of the obstacle H can be accurately grasped, and as an example, the unwinding of the shutter curtain 16 is stopped. You can get the exact timing to do it.

Further, since the high temperature of the laser diode is suppressed, the durability of the laser diode can be improved, and the durability of the image sensor 50A and the electronic component can be improved.

The case body 28B may be provided with a plurality of ventilation holes so that the hot air inside the case is discharged to the outside so that the TOF camera 34 does not become hot. Further, it is preferable that the obstacle detection device 26 is attached to a place not exposed to direct sunlight (such as the lower surface 18A of the shutter case 18) to prevent the TOF camera 34 from becoming hot.

[Other Embodiments]
Although an example of the embodiment of the present invention has been described above, the embodiment of the present invention is not limited to the above, and other than the above, various modifications can be made within a range not deviating from the gist thereof. Of course there is.

In the heat transfer member 46 of the obstacle detection device 26 of the above embodiment, the portion of the heat transfer member 46 opposite to the laser module 42 side was in surface contact with the lower surface 18A of the shutter case 18, but as shown in FIG. The portion of the transmission member 46 opposite to the laser module 42 side may be brought into surface contact with the mounting base 28A.

Since the heat of the laser diode is transferred to the metal shutter case 18 via the metal heat transfer member 46 and the metal mounting base 28A, this configuration also has a high cooling effect on the laser diode.

The mounting position of the obstacle detection device 26 is not limited to the lower surface 18A of the shutter case 18, but may be a portion other than the lower surface 18A of the shutter case 18, and is the guide rail 14 as shown by the alternate long and short dash line in FIG. You may. Further, in the above embodiment, the heat of the laser module 42 is transferred to the frame 19 via the heat transfer member 46 (and the camera case 28), but other members (and other members (between the laser module 42 and the frame 19) However, a material having a high thermal conductivity) may be present.

The light irradiation unit 38 may use a light emitting diode instead of the laser module 42.

In the above embodiment, the TOF camera is used as an example of the 3D camera, but a camera other than the TOF camera may be used as long as it can photograph an obstacle and measure the distance to the obstacle.

The opening / closing device may be a hinged door device or a sliding door device other than the shutter device, and the mounting position of the obstacle detection device 26 in that case may be, for example, a frame, a frame, a mullion, a door pocket, or the like constituting the frame of these devices. good.

10 Shutter device (switchgear)
14 Guide rail 16 Shutter curtain (opening and closing member)
18 Shutter case 19 Frame 20 Winding shaft (drive device)
22 Motor (drive device)
24 Control device 28 Camera case (case)
34 TOF camera (3D camera)
40 Imaging unit 42 Laser module (light source)
46 Heat transfer member

Claims (6)

The frame attached around the opening of the building structure and
An opening / closing member provided on the frame to open / close the opening,
A 3D camera that is attached to the frame and captures the imaging area around the opening.
With
The 3D camera includes an imaging unit that captures the imaging region, a light source that irradiates light toward the imaging region, and a heat transfer member to which the light source is attached and transfers heat generated by the light source to the frame. Consists of,
Switchgear. The switchgear according to claim 1, wherein the heat transfer member is made of a metal material. The frame attached around the opening of the building structure and
An opening / closing member provided on the frame to open / close the opening,
A 3D camera that is attached to the frame and captures the imaging area around the opening.
A case for accommodating the 3D camera and
With
The 3D camera has an imaging unit that captures the imaging region, a light source that irradiates light toward the imaging region, and heat generated by the light source attached to the light source is transmitted to the frame via the case. It is composed of a heat transfer member and
Switchgear. The switchgear according to claim 3, wherein at least one of the heat transfer member and the case is made of a metal material. The opening / closing member is a shutter curtain.
The frame includes a guide rail that movably guides the shutter curtain, and a shutter case provided at an end of the guide rail and accommodating a driving device that operates the shutter curtain. The switchgear according to any one of claims 1 to 4. The opening / closing device according to any one of claims 1 to 5, further comprising a control device that controls a driving device that operates the opening / closing member based on distance measurement information obtained from the 3D camera.

Images