WO2024070180A1 - スキャンセンサ - Google Patents
スキャンセンサ Download PDFInfo
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- WO2024070180A1 WO2024070180A1 PCT/JP2023/027434 JP2023027434W WO2024070180A1 WO 2024070180 A1 WO2024070180 A1 WO 2024070180A1 JP 2023027434 W JP2023027434 W JP 2023027434W WO 2024070180 A1 WO2024070180 A1 WO 2024070180A1
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- WIPO (PCT)
- Prior art keywords
- scanning
- scanning light
- planes
- light
- along
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
- G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
- G08B13/184—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier using radiation reflectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/04—Systems determining the presence of a target
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/42—Simultaneous measurement of distance and other co-ordinates
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4817—Constructional features, e.g. arrangements of optical elements relating to scanning
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/105—Scanning systems with one or more pivoting mirrors or galvano-mirrors
Definitions
- the present invention relates to a scan sensor used for crime prevention, etc.
- a conventional scan sensor used for crime prevention at important facilities is configured to detect intruders on a specified plane by rotating a mirror and reflecting laser light off the mirror to scan the plane.
- Such important facilities include facilities that store and exhibit rare or valuable items.
- shelves are provided to house the stored items and exhibits, and it is important to be able to detect access to these shelves.
- the above-mentioned problem is not limited to cases where the object to be prevented from being stolen is a shelf, but also occurs in cases where it is necessary to scan the scanning light along multiple planes surrounding the object to be prevented from being stolen, such as a bronze statue or other work of art.
- the present invention has been made to solve the above-mentioned problems, and aims to make it possible to scan a scanning light along multiple planes surrounding an object to be protected from crime, while minimizing the effort required to install sensors and keeping costs down.
- the scanning sensor of the present invention is characterized in that it comprises a light source, a sensor unit having a scanning mechanism for scanning light emitted from the light source along a predetermined plane, and an optical system for converting a first scanning light scanned along the predetermined plane into a second scanning light scanned along three planes different from the predetermined plane and perpendicular to each other.
- scanning along a plane is a concept that includes not only scanning in a direction parallel to the plane, but also scanning in a direction slightly tilted relative to the plane.
- the first scanning light scanned along a specific plane is converted into the second scanning light scanned along three mutually orthogonal planes different from the specific plane, so that the scanning light can be scanned along the three mutually orthogonal planes using a single scan sensor.
- the number of sensors required can be reduced compared to a configuration in which one sensor can only scan the scanning light along one plane, making it possible to scan the scanning light along at least three planes surrounding the object to be prevented while reducing the effort required to install the sensors and keeping costs down.
- the three planes are a plane extending along the horizontal direction and two planes extending along the vertical direction and perpendicular to each other. This configuration contributes to crime prevention for rectangular or cubic objects such as shelves.
- the optical system has a reflecting surface corresponding to each of the three planes, and the first scanning light is a light that is rotationally scanned around a predetermined axis and reflected by each of the reflecting surfaces.
- the first scanning light can be converted into the second scanning light in a reasonable configuration, and for example, the second scanning light can be scanned over a wide range of each plane while keeping the distance from the first scanning light to the reflective surface short, thereby enabling high-density scanning of the second scanning light on three planes while keeping the product compact.
- the reflective surfaces would need to be made larger, making it difficult to design a compact device or one that performs high-density scanning.
- the reflecting surface is provided around a vertex of a rectangular parallelepiped or cubic object, and the sensor unit is attached to the vertex.
- the senor further comprises a holder that can be attached to the apex portion, and that the sensor portion is held by the holder.
- the sensor unit can be more easily installed on the target object.
- the top or side of an object such as a shelf may be slightly inclined with respect to the horizontal or vertical plane. Therefore, it is preferable to further provide an optical adjustment mechanism for adjusting the position or angle of the optical system.
- the position or angle of the optical system can be adjusted according to the above-mentioned tilt, and the three planes as the surveillance area can be optimally set, thereby improving the reliability of detection. Furthermore, the degree of freedom in setting the direction of the second scanning light can be improved, making it possible to meet various requirements at installation sites.
- the optical adjustment mechanism adjusts the optical system so that the second scanning light is directed at an acute angle or an obtuse angle relative to the first scanning light, rather than a direction perpendicular to the first scanning light.
- the surveillance area in each of the three planes can be changed independently.
- one of the three planes can be excluded from the security area in one of the scan sensors, thereby preventing the above-mentioned erroneous detection.
- an operating part such as a switch that is operated by many people is provided on the side of a shelf or the like, security for the switch etc. can be relaxed by excluding that side from the security area.
- the present invention makes it possible to scan the scanning light along multiple planes surrounding the object of crime prevention while minimizing the effort required to install the sensor and keeping costs down.
- FIG. 2 is a schematic diagram showing a configuration of a sensor unit according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram showing a state in which the scan sensor of the embodiment is attached.
- FIG. 2 is an exploded perspective view of the scan sensor of the embodiment.
- FIG. 4 is a schematic diagram showing a second scanning light in the embodiment.
- FIG. 2 is a schematic diagram showing the arrangement of mirrors in the embodiment.
- FIG. 2 is a schematic diagram showing the configuration of an optical adjustment mechanism of the embodiment.
- FIG. 13 is a schematic diagram showing a state in which a scan sensor according to another embodiment is attached.
- FIG. 13 is a schematic diagram showing a state in which a scan sensor according to another embodiment is attached.
- FIG. 13 is a schematic diagram showing a state in which a scan sensor according to another embodiment is attached.
- 13A and 13B are schematic diagrams showing the configuration of a position adjustment mechanism according to another embodiment.
- the scan sensor of this embodiment is used for indoor security, and a specific example of an implementation is one in which it is installed in a facility that has shelves for storing or displaying rare or valuable items, etc., to prevent intruders from accessing the shelves.
- the device can be used to prevent intruders from accessing artworks such as bronze statues, and can be installed and used not only indoors but also outdoors in important facilities such as nuclear power plants and airport facilities.
- this scan sensor 100 has a sensor unit 10 that detects objects such as intruders in a pre-defined security area.
- the sensor unit 10 has a light source 11, a scanning mechanism 12 that scans the light emitted from the light source 11, a photodetector 13 that receives the light reflected by the detected object, and a control device 14 that sends and receives signals between the light source 11 and the photodetector 13.
- the light source 11 emits light that is scanned in the security area described above. Details of the security area will be described later.
- the light source 11 in this embodiment is a laser light source that emits laser light, and more specifically, it receives a control signal from the control device 14 and emits a pulse of laser light.
- the light source 11 is not limited to a laser light source, but may be a radiator that emits radio waves or electromagnetic waves, such as millimeter waves, microwaves, or ultrasound.
- the scanning mechanism 12 scans the light emitted from the light source 11 along a predetermined plane.
- the light scanned along this predetermined plane is referred to as the first scanning light L1.
- the sensor unit 10 of this embodiment has a mirror 15 that reflects the light emitted from the light source 11, and the scanning mechanism 12 rotates this mirror 15 around a predetermined axis T.
- the first scanning light L1 becomes light that is rotationally scanned around the predetermined axis T.
- the mirror 15 is disposed at an angle to the laser light emitted from the light source 11, and the scanning mechanism 12 rotates the mirror 15, for example, around the optical axis of the light source 11 as the axis of rotation, thereby scanning the laser light along a predetermined plane.
- the scanning mechanism 12 may be configured to rotate the light source 11 around a predetermined axis of rotation to cause the light emitted from the light source 11 to scan along a predetermined plane, and in this case the sensor unit 10 may not be required to include a mirror 15.
- the photodetector 13 detects light reflected by objects present in the above-mentioned security area, and outputs a light detection signal indicating the detection to the control device 14.
- the photodetector 13 in this embodiment receives laser light and is, for example, a photodiode such as an APD.
- the photodetector 13 is not necessarily limited to this and may be changed as appropriate depending on, for example, the type of light source 11.
- the control device 14 physically comprises at least an information processing circuit composed of a CPU, memory, etc., and functionally functions as an object detection unit that detects objects present in the surveillance area based on the light detection signal from the above-mentioned light detector 13 by the CPU and other peripheral devices working together in accordance with the program stored in the memory.
- the alert area of the scan sensor 100 is the range in which an object can be detected and in which a signal (alarm) is output when an object is detected.
- the scan sensor 100 of this embodiment is what is known as LiDAR (Light Detection and Ranging), and the control device 14 is equipped with a TOF circuit 16 as shown in FIG. 1.
- LiDAR Light Detection and Ranging
- control device 14 of this embodiment measures the time from when the light source 11 emits a pulse of laser light to when the laser light is reflected and received by the detected object, and by converting this measured time into distance, it also functions as a distance measuring unit that measures the distance to the detected object, and as a position acquisition unit that acquires the coordinates, which are position information of the detected object, from the angle of the received laser light.
- control device 14 only needs to have at least the functionality of an object detection unit, and does not necessarily need to have the functionality of one or both of a distance measurement unit and a position acquisition unit.
- the scan sensor 100 of this embodiment is used to prevent access to the shelf, and the shelf can be considered the object X of crime prevention.
- the sensor unit 10 is attached to a shelf, which is an object X to be protected from theft.
- the sensor unit 10 of this embodiment is attached to an object X that has a rectangular parallelepiped or cubic shape.
- rectangular parallelepiped shape referred to here is a concept that includes not only strict rectangular parallelepipeds but also shapes that are slightly deformed from rectangular parallelepipeds
- cubic shape referred to here is a concept that includes not only strict cubes but also shapes that are slightly deformed from cubes.
- the scan sensor 100 of this embodiment further includes a holder 20 that holds the sensor unit 10, and the sensor unit 10 is attached to the object X via this holder 20.
- the holder 20 can be attached to one of the vertices X1 of the object X, and in this case is attached to the vertex X1 located at the corner of the top surface from the outside of the object X.
- the vertex X1 here is a concept that includes not only the strict vertex, but also an area slightly away from the vertex.
- the holder 20 has a triangular pyramid shape with installation surfaces 21 aligned along three planes including the apex X1 of the object X.
- the sensor unit 10 is attached to the apex of the holder 20, for example, via a mounting member (not shown).
- each of the installation surfaces 21 is installed on the three planes of the object X, and the sensor unit 10 is attached to the vertex X1 of the object X via the holder 20.
- the holder 20 In order to easily install the holder 20 on the object X, it is desirable for the holder 20 to have the three installation surfaces 21 described above, but the specific shape is not limited to a triangular pyramid shape and may be modified as appropriate.
- the scan sensor 100 of this embodiment further includes an optical system 30 that converts the first scanning light L1 scanned along the above-mentioned specific plane into a second scanning light L2 scanned along three planes that are different from the specific plane and perpendicular to each other, as shown in Figure 4.
- FIG. 4 shows the second scanning light L2 that scans along the top surface of the object X, and omits the second scanning light L2 that scans along the other two planes.
- This optical system 30 converts the first scanning light L1 into the second scanning light L2 that is scanned along multiple planes that surround at least a portion of the object X, and the entire area scanned by the second scanning light L2 is set as the security area. However, as for the security area, a portion of the area scanned by the second scanning light L2 may also be set as the security area.
- the surveillance area is set along at least three planes of the object X, which has a rectangular or cubic shape.
- the three planes scanned by the second scanning light L2 are a plane along the horizontal direction and two planes along the vertical direction that are perpendicular to each other.
- plane along the horizontal direction here refers not only to planes parallel to the horizontal direction, but also to planes slightly tilted relative to the horizontal direction
- plane along the vertical direction refers not only to planes parallel to the vertical direction, but also to planes slightly tilted relative to the vertical direction.
- the optical system 30 is connected to the above-mentioned holder 20 via a connecting portion 40, and thus, when positioned relative to the sensor portion 10, converts the first scanning light L1 into a second scanning light L2 that is scanned along the top surface of the object X, a second scanning light L2 that is scanned along one side surface perpendicular to the top surface, and a second scanning light L2 that is scanned along another side surface perpendicular to the top surface.
- the first scanning light L1 is set to be rotated and scanned 360 degrees around a specific axis T, and the optical system 30 can be said to split this rotated and scanned first scanning light L1 into second scanning light L2 along three mutually orthogonal planes.
- the sensor unit 10 of this embodiment is capable of changing the angular range in which the first scanning light L1 is rotated for scanning, and by appropriately changing this angular range, the scanning range of the second scanning light L2 in each of the three planes can be changed.
- the optical system 30 has a plurality of mirrors 31, which are optical elements that convert the first scanning light L1 into the second scanning light L2 by reflecting it, and an exterior member 32 that holds these mirrors 31.
- the mirror 31 has a reflective surface that reflects the first scanning light L1, and is provided corresponding to each of the three planes on which the second scanning light L2 is scanned. These reflective surfaces of the mirror 31 are provided around the vertex X1 on which the above-mentioned sensor unit 10 is attached. With this configuration, the first scanning light L1 that is rotationally scanned around a specific axis is reflected by each of the reflective surfaces and converted into the second scanning light L2 along each of the three planes.
- these mirrors 31 are arranged so that the angle ⁇ formed around a specific axis T, which is the center of rotation of the first scanning light L1, is a constant angle.
- One example of an arrangement when the object X has a cubic shape is one in which, when looking down on the vertices of the object X, the three mirrors 31 are arranged at 120 degree intervals around the specific axis T.
- the distance from the specified axis T to each mirror 31 is set to be equal here, the distance from the specified axis T to each mirror 31 may be set to be different.
- an exterior member 32 is provided for each mirror 31, and in this embodiment, the exterior members 32 are provided integrally. More specifically, three exterior members 32 are arranged to form a triangular pyramid shape, and each exterior member 32 holds each mirror 31 so that the reflective surface of each mirror 31 faces the sensor unit 10, in other words, so that the reflective surface of each mirror 31 surrounds the sensor unit 10. It is not necessary that these exterior members 32 are integral, and some or all of the exterior members 32 may be separate.
- the scan sensor 100 of this embodiment is provided with an optical adjustment mechanism 50 that is interposed between the mirror 31 and the exterior member 32 and adjusts the position or angle of the mirror 31.
- the scan sensor 100 according to the present invention does not necessarily need to be provided with the optical adjustment mechanism 50.
- the optical adjustment mechanism 50 of this embodiment moves the mirror 31 relative to the exterior member 32, and specifically includes a rotating member 51 that rotatably supports the mirror 31, which is an optical element that constitutes the optical system 30, and a power transmission mechanism (not shown) that transmits the power to rotate the rotating member 51 to the rotating member 51.
- the power transmission mechanism include a mechanism using a shelf and pinion, and a mechanism using one or more cams or gears.
- the optical adjustment mechanism 50 may adjust the optical system 30 so that the second scanning light L2 is directed at an acute angle relative to the first scanning light L1, as shown in the schematic diagram of FIG. 7, or may be configured to adjust the optical system 30 so that the second scanning light L2 is directed at an obtuse angle relative to the first scanning light L1, as shown in the schematic diagram of FIG. 8.
- the configuration in which the second scanning light L2 is directed at an acute angle to the first scanning light L1 (FIG. 8) is more compact than the configuration in which the second scanning light L2 is directed at an obtuse angle to the first scanning light L1 (FIG. 7) because it is not necessary to expand the mirror 31, which is an optical element, making the device more compact.
- the position or angle of the optical system 30 can be adjusted according to this tilt, and the three planes as the surveillance area can be optimally set, improving the reliability of detection.
- the second scanning light L2 when the second scanning light L2 is scanned in a direction perpendicular to a wall or floor surface, there is a risk of false detection due to the second scanning light L2 being reflected by the wall or floor surface.
- the second scanning light L2 is directed at an acute or obtuse angle relative to the first scanning light L1 rather than perpendicular to the first scanning light L1, thereby preventing the second scanning light L2 from being reflected by the wall or floor surface and preventing the above-mentioned false detection.
- the degree of freedom in setting the direction of the second scanning light L2 can be improved, making it possible to meet the various requirements of the installation site.
- the configuration shown in Figures 7 and 8 has a through hole that allows either the emitted light emitted from the light source 11 or the reflected light reflected by an object to pass through, and uses a mirror 17 that reflects the other. This allows part of the light projection path La of the emitted light and part of the light receiving path Lb of the reflected light to be shared, thereby reducing the number of parts and making the device more compact.
- the scan sensor 100 configured in this manner is equipped with an optical system 30 that converts the first scanning light L1 scanned along a specific plane into the second scanning light L2 scanned along three mutually orthogonal planes different from the specific plane, so that a single scan sensor 100 can be used to scan the scanning light along the three mutually orthogonal planes.
- the number of sensors required can be reduced compared to a configuration in which one sensor can only scan one plane with the scanning light, so that it is possible to scan the scanning light along at least three planes surrounding the crime prevention object X while reducing the effort required for installing the sensors and keeping costs down.
- the three planes scanned by the second scanning light L2 are a plane along the horizontal direction and two planes along the vertical direction that are perpendicular to each other, which contributes to crime prevention for objects X that have a rectangular or cubic shape, such as shelves.
- the optical system has a reflective surface corresponding to each of the three planes
- the first scanning light can be converted into the second scanning light in a reasonable configuration, and for example, the second scanning light can be scanned over a wide area of each plane while keeping the distance from the first scanning light to the reflective surface short. This makes it possible to keep the product compact while enabling high-density scanning of the second scanning light on the three planes.
- the reflective surface of the mirror 31 is provided around the vertex X1 of the object X, which has a rectangular or cubic shape, and the sensor unit 10 is attached to the vertex X1, so that a surveillance area can be set along three planes of the object X with a simple configuration.
- the holder 20 is attached to the vertex X1, and the sensor unit 10 is held by the holder 20, so the sensor unit 10 can be more easily installed on the object X.
- a single scan sensor 100 was used to set a security area along three planes of the object X, but as shown in FIG. 9, two scan sensors 100 may be used to set a security area along five planes excluding the bottom surface of the object X.
- a scan sensor 100 may be installed at each of two diagonal vertices X1 on the top surface of the target object X.
- the top surface of the object X will be scanned by both the second scanning light L2 from one scan sensor 100 and the second scanning light L2 from the other scan sensor 100, and as a result, the second scanning light L2 from one scan sensor 100 will be detected by the other scan sensor 100, which may lead to an erroneous detection.
- the scanning sensor 100 according to the present invention is capable of changing the surveillance area independently in each of the three planes.
- a specific example of a practical implementation for independently changing the surveillance area is to change the scanning range of the second scanning light L2 in each of the three planes by changing the angular range of rotational scanning of the first scanning light L1, as described in the above embodiment.
- Other embodiments include a configuration in which the scanning range of the second scanning light L2 is maintained while the area within that scanning range in which an object can be detected is changeable, and a configuration in which the area within that scanning range in which a signal (alarm) is output when an object is detected is changeable.
- the security area along the top surface of that one scan sensor 100 is modified (eliminated) independently from the security areas along the other side surfaces.
- one of the three planes can be excluded from the security area, and erroneous detection caused by using the two scan sensors 100 described above can be prevented.
- an operating part such as a switch that is operated by many people is provided on the side of the object X such as a shelf, the security of the operating part such as the switch can be released by excluding the side from the security area.
- the scanning range for scanning the second scanning light L2 may be set independently of each other in each plane, as shown in FIG. 10.
- the scanning range of the second scanning light L2 does not necessarily have to be set over the entire plane of the object X, but may be set over only a part of the plane.
- a specific example of the configuration is one in which the scanning range of the second scanning light L2 in each of the three planes can be set by inputting the lengths of the mutually orthogonal X-axis, Y-axis, and Z-axis.
- the optical system 30 is described as being configured using a mirror 31 as an optical element, but it may also be configured using an optical element such as a prism that refracts the first scanning light L1.
- the holder 20 is attached to the vertex X1 of the object X from the outside, but as shown in FIG. 11, if the object X is accessible to the inside of a shelf or the like, it may be attached to the vertex X1 of the object X from the inside.
- the sensor unit 10 held by this holder may be attached to the outside of the vertex X1 of the object X, or may be attached to the inside of the vertex X1 of the object X.
- the sensor unit 10 is provided at the vertex X1 of the object X via the holder 20, but the sensor unit 10 does not necessarily have to be provided at the vertex X1, and may be provided on a certain surface or side of the object X.
- the power transmission mechanism 52 constituting the optical adjustment mechanism 50 can be, for example, a mechanism using a shelf and pinion, or a mechanism using one or more cams or gears, as shown in FIG. 12.
- the present invention makes it possible to scan a scanning light along multiple planes surrounding an object to be protected from crime, while minimizing the effort required to install sensors and keeping costs down.
- Scan sensor X Target object (shelf) REFERENCE SIGNS LIST 10 Sensor unit 11 Light source 12 Scanning mechanism 13 Photodetector 14 Control device 15 Mirror T Predetermined axis 20 Holder 21 Installation surface 30 Optical system 31 Mirror L1 First scanning light L2 Second scanning light 40 Connection unit 50 Optical adjustment mechanism
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Abstract
Description
なお、本明細書において「平面に沿って走査される」とは、その平面と平行な方向に走査されることのみならず、その平面に対して僅かに傾いた方向に走査されることも含む概念である。
その結果、1台のセンサでは1平面にしか走査光を走査できない構成に比べて、センサの必要な個数を削減することができるので、センサを設置する手間を少なく済ませつつ、且つ、コストを抑えながらも、防犯の対象物を囲う少なくとも3平面に沿って走査光を走査することが可能となる。
このような構成であれば、棚等の直方体形状又は立方体形状をなす対象物の防犯に資する。
このような構成であれば、第1走査光を無理のない構成で第2走査光に変換することができ、例えば第1走査光から反射面までの距離を短く保ちつつ、各平面の広範囲に亘って第2走査光を走査させることができる。これにより、製品をコンパクトに保ちつつ、3平面における第2走査光の高密度な走査を可能にすることができる。
なお、仮に2つの反射面で第1走査光を3平面に沿った第2走査光に変換しようとすると、例えば各平面の広範囲に第2走査光を走査させるためには、反射面の大型化が必要となり、コンパクト化や高密度な走査を行う設計が困難になる。
このような構成であれば、シンプルな構成で3平面を警戒エリアとして設定することができる。
このような構成であれば、対象物に対してセンサ部をより簡単に設置することができる。
そこで、前記光学系の位置又は角度を調整する光学調整機構をさらに備えることが好ましい。
このような構成であれば、上述した傾きに応じて光学系の位置又は角度を調整することができ、警戒エリアとしての3平面を最適に設定することができ、検知信頼性の向上を図れる。
また、第2走査光の向きの設定自由度を向上させることができ、設置現場の種々の要求に対応することが可能となる。
そこで、前記光学調整機構が、前記第1走査光に対して前記第2走査光を、直交させる向きよりも鋭角に又は鈍角に向かわせるように前記光学系を調整するものであることが好ましい。
このような構成であれば、第2走査光の壁面又は床面での反射を逃がすことができ、上述した誤検知を防ぐことができる。
しかしながら、この場合、例えば棚の天面など5平面のうちの1平面には、一方のスキャンセンサによる第2走査光と、他方のスキャンセンサによる第2走査光とのそれぞれが走査されることになり、その結果、一方のスキャンセンサによる第2走査光が他方のスキャンセンサで検知されて、誤検知を招く恐れがある。
そこで、前記3平面それぞれにおける警戒エリアを独立して変更可能であることが好ましい。
このような構成であれば、一方のスキャンセンサにおいて、3平面のうちの1平面を警戒エリアから除くことができ、上述した誤検知を防ぐことができる。
また、棚等の側面に多数の人が操作するスイッチ等の操作部が設けられている場合、その側面を警戒エリアから除くことでスイッチ等に対する警戒を解くことができる。
本実施形態のスキャンセンサは、屋内の防犯に用いられるものであり、具体的な実施態様としては、希少品や貴重品などの保管物又は展示物を収容する棚が設けられた施設に設置されて、侵入者による棚へのアクセスを防ぐためのものが挙げられる。
なお、図4においては、説明の便宜上、対象物Xの天面に沿って走査される第2走査光L2を示してあり、その他の2平面に沿って走査される第2走査光L2は省略してある。
なお、これらの外装部材32は必ずしも一体である必要はなく、一部又は全部の外装部材32が別体のものであっても良い。
このように構成されたスキャンセンサ100によれば、所定平面に沿って走査される第1走査光L1を、当該所定平面とは異なり互いに直交する3平面に沿って走査される第2走査光L2に変換する光学系30を備えるので、1台のスキャンセンサ100を用いて互いに直交する3平面に沿って走査光を走査させることができる。
その結果、1台のセンサでは1平面にしか走査光を走査できない構成に比べて、センサの必要な個数を削減することができるので、センサを設置する手間を少なく済ませつつ、且つ、コストを抑えながらも、防犯の対象物Xを囲う少なくとも3平面に沿って走査光を走査することが可能となる。
なお、本願発明は、前記実施形態に限られるものではない。
また、棚等の対象物Xの側面に多数の人が操作するスイッチ等の操作部が設けられている場合、その側面を警戒エリアから除くことでスイッチ等の操作部の警戒を解くことができる。
X ・・・対象物(棚)
10 ・・・センサ部
11 ・・・光源
12 ・・・走査機構
13 ・・・光検出器
14 ・・・制御機器
15 ・・・鏡
T ・・・所定軸
20 ・・・保持体
21 ・・・設置面
30 ・・・光学系
31 ・・・ミラー
L1 ・・・第1走査光
L2 ・・・第2走査光
40 ・・・連結部
50 ・・・光学調整機構
Claims (8)
- 光源、及び、前記光源から射出される光を所定平面に沿って走査させる走査機構を有するセンサ部と、
前記所定平面に沿って走査される第1走査光を、当該所定平面とは異なり互いに直交する3平面に沿って走査される第2走査光に変換する光学系とを備えることを特徴とするスキャンセンサ。 - 前記3平面が、水平方向に沿った平面と、鉛直方向に沿った互いに直交する2つの平面とであることを特徴とする請求項1記載のスキャンセンサ。
- 前記光学系が、前記3平面それぞれに対応する反射面を有し、
前記第1走査光が、所定軸周りに回転走査されて、前記反射面のそれぞれにより反射される光であることを特徴とする請求項1記載のスキャンセンサ。 - 前記反射面が、直方体形状又は立方体形状をなす対象物の頂点部の周囲に設けられており、その頂点部に前記センサ部が取り付けられていることを特徴とする請求項3記載のスキャンセンサ。
- 前記頂点部に取付可能な保持体をさらに備えており、その保持体に前記センサ部が保持されていることを特徴とする請求項4記載のスキャンセンサ。
- 前記光学系の位置又は角度を調整する光学調整機構をさらに備えることを特徴とする請求項1記載のスキャンセンサ。
- 前記光学調整機構が、前記第1走査光に対して前記第2走査光を、直交させる向きよりも鋭角に又は鈍角に向かわせるように前記光学系を調整するものであることを特徴とする請求項6記載のスキャンセンサ。
- 前記3平面それぞれにおける警戒エリアを独立して変更可能であることを特徴とする請求項1記載のスキャンセンサ。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024549792A JP7745109B2 (ja) | 2022-09-27 | 2023-07-26 | スキャンセンサ |
| US19/113,733 US20260016596A1 (en) | 2022-09-27 | 2023-07-26 | Scan sensor |
| EP23871423.2A EP4597199A4 (en) | 2022-09-27 | 2023-07-26 | SCANNING SENSOR |
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| JP2022-153399 | 2022-09-27 | ||
| JP2022153399 | 2022-09-27 |
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| WO2024070180A1 true WO2024070180A1 (ja) | 2024-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2023/027434 Ceased WO2024070180A1 (ja) | 2022-09-27 | 2023-07-26 | スキャンセンサ |
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| Country | Link |
|---|---|
| US (1) | US20260016596A1 (ja) |
| EP (1) | EP4597199A4 (ja) |
| JP (1) | JP7745109B2 (ja) |
| WO (1) | WO2024070180A1 (ja) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63170613A (ja) * | 1986-12-22 | 1988-07-14 | シンボル テクノロジイズ インコーポレイテッド | バーコードシンボル読取り機のための走査パターン発生器 |
| JP2010151809A (ja) * | 2008-11-26 | 2010-07-08 | Denso Wave Inc | レーザレーダ装置 |
| JP2011022080A (ja) * | 2009-07-17 | 2011-02-03 | Optex Co Ltd | レーザスキャンセンサ |
| JP2017227569A (ja) | 2016-06-23 | 2017-12-28 | オプテックス株式会社 | レーザースキャンセンサ |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19757848C2 (de) * | 1997-12-24 | 2003-04-30 | Sick Ag | Vorrichtung zur optischen Erfassung von Objekten |
| US7083102B2 (en) * | 2002-01-11 | 2006-08-01 | Metrologic Instruments, Inc. | Bioptical laser scanner for six-sided 360° Pos-based scanning |
| JP4213155B2 (ja) | 2005-11-21 | 2009-01-21 | 北陽電機株式会社 | 無人搬送台車の前方障害物センサ |
| US8169596B2 (en) | 2009-08-17 | 2012-05-01 | Seegrid Corporation | System and method using a multi-plane curtain |
| JP5937158B2 (ja) * | 2014-08-27 | 2016-06-22 | シャープ株式会社 | 安全センサ |
-
2023
- 2023-07-26 WO PCT/JP2023/027434 patent/WO2024070180A1/ja not_active Ceased
- 2023-07-26 EP EP23871423.2A patent/EP4597199A4/en active Pending
- 2023-07-26 JP JP2024549792A patent/JP7745109B2/ja active Active
- 2023-07-26 US US19/113,733 patent/US20260016596A1/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63170613A (ja) * | 1986-12-22 | 1988-07-14 | シンボル テクノロジイズ インコーポレイテッド | バーコードシンボル読取り機のための走査パターン発生器 |
| JP2010151809A (ja) * | 2008-11-26 | 2010-07-08 | Denso Wave Inc | レーザレーダ装置 |
| JP2011022080A (ja) * | 2009-07-17 | 2011-02-03 | Optex Co Ltd | レーザスキャンセンサ |
| JP2017227569A (ja) | 2016-06-23 | 2017-12-28 | オプテックス株式会社 | レーザースキャンセンサ |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4597199A4 |
Also Published As
| Publication number | Publication date |
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| US20260016596A1 (en) | 2026-01-15 |
| EP4597199A1 (en) | 2025-08-06 |
| JP7745109B2 (ja) | 2025-09-26 |
| EP4597199A4 (en) | 2026-01-14 |
| JPWO2024070180A1 (ja) | 2024-04-04 |
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