WO2008032380A1 - Dispositif de capteur pour porte - Google Patents

Dispositif de capteur pour porte Download PDF

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Publication number
WO2008032380A1
WO2008032380A1 PCT/JP2006/318234 JP2006318234W WO2008032380A1 WO 2008032380 A1 WO2008032380 A1 WO 2008032380A1 JP 2006318234 W JP2006318234 W JP 2006318234W WO 2008032380 A1 WO2008032380 A1 WO 2008032380A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light projecting
reflecting mirror
unit
sensor device
Prior art date
Application number
PCT/JP2006/318234
Other languages
English (en)
Japanese (ja)
Inventor
Yoshiyuki Uchida
Original Assignee
Mitsubishi Electric Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corporation filed Critical Mitsubishi Electric Corporation
Priority to PCT/JP2006/318234 priority Critical patent/WO2008032380A1/fr
Publication of WO2008032380A1 publication Critical patent/WO2008032380A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
    • G01V8/22—Detecting, e.g. by using light barriers using multiple transmitters or receivers using reflectors
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/40—Safety devices, e.g. detection of obstructions or end positions
    • E05F15/42—Detection using safety edges
    • E05F15/43—Detection using safety edges responsive to disruption of energy beams, e.g. light or sound
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/70—Power-operated mechanisms for wings with automatic actuation
    • E05F15/73—Power-operated mechanisms for wings with automatic actuation responsive to movement or presence of persons or objects
    • E05F15/74—Power-operated mechanisms for wings with automatic actuation responsive to movement or presence of persons or objects using photoelectric cells
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/40—Safety devices, e.g. detection of obstructions or end positions
    • E05F15/42—Detection using safety edges
    • E05F15/43—Detection using safety edges responsive to disruption of energy beams, e.g. light or sound
    • E05F2015/434—Detection using safety edges responsive to disruption of energy beams, e.g. light or sound with cameras or optical sensors
    • E05F2015/435—Detection using safety edges responsive to disruption of energy beams, e.g. light or sound with cameras or optical sensors by interruption of the beam
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13—Type of wing
    • E05Y2900/132—Doors

Definitions

  • the present invention relates to a door sensor device that detects an obstacle at an entrance that is opened and closed by a slide door.
  • Entrances and elevators of buildings whose doorways are opened and closed by sliding doors are equipped with door sensor devices that detect obstacles at the doorways, so that passersby can be sandwiched between sliding doors during closing, Some have prevented foreign objects from colliding.
  • a door sensor device for example, an arrangement in which a light emitting element and a light receiving element are arranged so as to face each other with an entrance / exit interposed therebetween has also been proposed.
  • the powerful door sensor device detects the presence of an obstacle at the doorway when light from the light emitting element cannot be detected by the light receiving element during the closing operation of the sliding door.
  • the door sensor device having the above-described configuration has a problem in that workability is poor because it is necessary to adjust the optical axis so that the light-receiving element receives light from the light-emitting element at the time of installation.
  • a plurality of light emitting elements and light receiving elements are alternately arranged on one side with the doorway interposed therebetween, and the light from the light emitting elements is reflected on the other side by directing the light to the light receiving element.
  • a door sensor device in which a reflector to be arranged is arranged (see, for example, Patent Document 1).
  • light from the light emitting element is emitted at a wide angle in the vertical direction and at a narrow angle in the entrance / exit direction, and light of one light emitting element force is received by a plurality of light receiving elements. Then, an obstacle at the entrance / exit is detected by a change in intensity of light received by the entire light receiving element.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2005-263434
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a door sensor device that can detect an obstacle at an entrance that is opened and closed by a slide door at low cost and with high accuracy. Is to provide.
  • the door sensor device includes a first reflection mirror provided on one side of the entrance and exit on the other side of the entrance and exit, and a door sensor device that detects an obstacle at the entrance and exit that is opened and closed by the slide door.
  • a light projecting / receiving unit, and the light projecting / receiving unit is disposed on either the upper side or the lower side of the second reflecting mirror, the second reflecting mirror facing the first reflecting mirror with the doorway interposed therebetween.
  • a light projecting unit that irradiates a light beam that crosses the entrance and exit in a space sandwiched between the first reflection mirror and the second reflection mirror, and the other one above and below the second reflection mirror.
  • a light receiving unit that receives light from the light projecting unit reflected a plurality of times by the reflecting mirror.
  • FIG. 1 is a front view showing a door sensor device according to Embodiment 1 of the present invention.
  • FIG. 2 is a diagram showing an operation of the door sensor device according to the first embodiment of the present invention. Explanation of symbols [0011] 1 doorway, 2 sliding doors, 3 sliding doors, 4 reflectors,
  • FIG. 1 is a front view showing a door sensor device according to Embodiment 1 of the present invention
  • FIG. 2 is a diagram showing an operation of the door sensor device according to Embodiment 1 of the present invention.
  • [0014] 1 is an entrance / exit formed at the entrance of a building, elevator car, etc. 2 and 3 are sliding doors of a double-opening system that opens and closes the entrance 1
  • the reflector 5 is a light emitter / receiver provided at the end of the other sliding door 3 at the entrance / exit 1 side.
  • the reflector 4 is provided with a reflecting mirror 6 (first reflecting mirror), and the light projector / receiver 5 is provided with a plurality of light projecting / receiving sections 7 extending above and below the entrance / exit 1.
  • the light projecting / receiving unit 7 is arranged so as to face each other with the doorway 1 in between. That is, the reflection mirror 6 is provided on one side of the entrance / exit 1, and the light projecting / receiving units 7 are provided on the other side of the entrance / exit 1.
  • Each of the light projecting / receiving units 7 is disposed above the reflecting mirror 8 and a reflecting mirror 8 (second reflecting mirror) disposed so as to face the reflecting mirror 6 with the entrance / exit 1 interposed therebetween.
  • a light projecting unit 9 and a light receiving unit 10 disposed below the reflecting mirror 8 are provided.
  • the light projecting unit 9 crosses the entrance / exit 1 in a space (hereinafter referred to as a “parallel mirror space”) sandwiched between the reflecting surfaces of the reflecting mirrors 6 and 8 disposed substantially parallel to each other.
  • the light beam is irradiated with a predetermined angle directed downward.
  • the light beam irradiated from the light projecting unit 9 travels downward while being reflected by the reflecting mirrors 6 and 8 a plurality of times, passes through the parallel mirror space, and is received by the light receiving unit 10.
  • the light projecting unit 9 is below the reflecting mirror 8 and the light receiving unit 10 is
  • the mirror 8, the light projecting unit 9, and the light receiving unit 10 may be disposed upside down with respect to the above. In such a case, the light beam emitted from the light projecting unit 9 enters the parallel mirror space so as to cross the entrance 1 and to have an upward force at a predetermined angle. Then, after being reflected a plurality of times by the reflecting mirrors 6 and 8, the light is received by the light receiving unit 10.
  • 11 controls the operation of the light projecting unit 9 and the light receiving unit 10 of each light projecting / receiving unit 7, and determines the presence / absence of an obstacle at the entrance 1 based on the signal detected by the light receiving unit 10.
  • CPU for control controls the operation of the light projecting unit 9 and the light receiving
  • the door sensor device having the above configuration, when the light beam emitted from the light projecting unit 9 is not received by the light receiving unit 10, it is detected that the obstacle is blocked by the light beam, and the presence of the obstacle at the entrance 1 is detected. . Therefore, the range in which obstacles can be detected by one set of light projecting and receiving parts 7 (the pair of light projecting parts 9 and light receiving parts 10) can be expanded in the vertical direction, and the obstacles at the entrance 1 can be made inexpensively and accurately. It becomes possible to detect.
  • the light beam emitted from the light projecting unit 9 is reflected a plurality of times between the reflecting mirrors 6 and 8 before being received by the light receiving unit 10, so that the pair of light projecting units 9 and the light receiving unit 9 receive light.
  • the section 10 can form a large number of light beams crossing the entrance / exit 1, and the number of light emitting elements and light receiving elements used in the entire apparatus can be reduced. Specifically, since the light emitted from the light projecting unit 9 is reflected at least twice by the reflecting mirror 6 and once by the reflecting mirror 8, the pair of light projecting unit 9 and light receiving unit 10 are used to enter and exit the entrance / exit. At least four rays crossing 1 can be formed.
  • the light projecting angle from the light projecting unit 9 and the length of the reflecting surface of the reflecting mirror 8 are set so as to increase the number of times the light beam is reflected, so that the pair of light projecting units 9 and the light receiving unit
  • 10 allows more rays to cross the doorway 1.
  • the electrical components such as the light projecting unit 9 and the light receiving unit 10 are mounted only on the other slide door 3, the wiring is simplified and the installation is also improved. I can expect.
  • the reflection mirror 6 is provided on one slide door 2 and the light projecting / receiving unit 7 is provided on the other slide door 3. Therefore, as the slide doors 2 and 3 move (open / close operation), the distance between the reflection mirror 6 and the light projecting / receiving unit 7 changes, and the number of reflections and the reflection position of the light emitted from the light projecting unit 9 change. Therefore, the position where the light beam from the light projecting unit 9 enters the light receiving unit 10 also changes as the slide doors 2 and 3 move.
  • the angle at which the light beam from the light projecting unit 9 enters the light receiving unit 10 depends on the assembly accuracy of the light projecting / receiving unit 7 and the installation accuracy of the reflection mirror 6 and the light projecting / receiving unit 7 (reflection mirror 8). .
  • FIG. 2 shows a case where the reflection mirrors 6 and 8 are installed with a predetermined installation error angle.
  • ⁇ is the light projection angle of the light emitted from the light projecting unit 9 with respect to the normal of the reflecting surface of the reflecting mirror 8
  • ⁇ is the installation error angle of the reflecting mirror 6 to the reflecting mirror 8 mm. is there.
  • the incident angle of the light beam irradiated from the light projecting unit 9 with respect to the reflecting mirrors 6 and 8 increases with each reflection and decreases with each reflection.
  • a case may be considered.
  • the incident angle becomes smaller at every reflection, the light beam may not reach the light receiving unit 10, so that the actual installation is adjusted closer to the former. Therefore, only the case where power is applied will be described in FIG.
  • the incident angle of the light beam irradiated from the light projecting unit 9 with respect to the reflection mirrors 6 and 8 is given by ⁇ + ⁇
  • ⁇ is the number of reflections. In such a case, the incident angle increases with each reflection. Further, as described above, the number of reflections of the light rays emitted from the light projecting unit 9 also change as the slide doors 2 and 3 move. Therefore, the angle at which the light beam irradiated from the light projecting unit 9 enters the light receiving unit 10 also changes as the slide doors 2 and 3 move.
  • the position and angle at which the light beam from the light projecting unit 9 enters the light receiving unit 10 changes as the slide doors 2 and 3 move.
  • the change in the incident position and the incident angle may occur if the reflecting mirror 6 and the light projecting / receiving unit 7 are provided at the end of the sliding door 2 or 3 at the entrance / exit 1 side.
  • the light receiving unit 10 receives the light emitted from the light projecting unit 9 so that the light emitted from the light projecting unit 9 can be reliably received even when the slide doors 2 and 3 move.
  • the distance between the reflecting mirror 6 and the light projecting / receiving section 7 is changed as the slide doors 2 and 3 are moved.
  • a condensing unit 13 that collects the light from the light projecting unit 9 reflected by the reflecting mirrors 6 and 8 a plurality of times and causes the light receiving body 12 to receive the light.
  • the condensing unit 13 is composed of one or more optical components such as a lens and a prism. Is done.
  • the light receiving unit 10 has, for example, a condensing range of the light converging unit 13 from the light projecting unit 9.
  • the sliding doors 2 and 3 where the distance between the irradiated light beams is the smallest are fully opened, two or more light beams from the light projecting unit 9 reflected by the reflecting mirrors 6 and 8 are condensed several times to receive the light receiver 12. It is designed to have a predetermined vertical width that can be received by the light.
  • the light condensing range refers to a predetermined amount of light received by the photoreceptor 12 when light rays from the light projecting unit 9 reflected a plurality of times by the reflecting mirrors 6 and 8 enter the range of the light condensing unit 13.
  • the range that can be detected it is assumed that two or more light beams are collected, even if the number of reflections of the light beam changes as the slide doors 2 and 3 move, at least one light beam is always incident on the light collection range. This is to secure what is done.
  • the condensing unit 13 is provided with a separation function that separates the light from the light projecting unit 9 reflected by the reflection mirrors 6 and 8 into the transmitted light and the reflected light, thereby receiving the transmitted light.
  • the body 12 receives the light and reflects the reflected light toward the reflection mirror 6.
  • the condensing range of the condensing unit 13 is condensed on the condensing unit 13 and received by the photoreceptor 12 when the reflected light power sliding doors 2 and 3 further reflected by the reflecting mirror 6 are fully opened.
  • the light receiving unit 10 is provided with some display means (not shown), so that the light projecting unit reflected on the door sensor device by the reflecting mirrors 6 and 8 a plurality of times. It is also possible to install a function that can display that at least two rays from 9 are incident on the condensing range of the condensing unit 13. When it is applied, the door sensor device can be installed while confirming the display, so optical axis adjustment without using special installation jigs or measuring instruments can be performed.
  • the condensing unit 13 has the above separating function such as a half mirror, the reflected light reflected by the half mirror is further reflected by the reflecting mirror 6 and then received by receiving the transmitted light. Different from the light emitting / receiving unit 7 having the body 12 to the light receiving unit 12 of the other light emitting / receiving unit 7 You may make it receive light.
  • the door sensor device has the above-described configuration, so that even if a change in the distance between the reflecting surfaces of the reflecting mirrors 6 and 8, a predetermined installation accuracy and assembly accuracy, a movement of the sliding doors 2 and 3, and the like occur,
  • the light beam emitted from the light unit 9 can be reliably received by the light receiving unit 10, and the obstacle at the entrance / exit 1 can be accurately detected.
  • Multiple sets of light emitting / receiving sections 7 need to be arranged one above the other.
  • control CPU 11 The operations of the light projecting unit 9 and the light receiving unit 10 may be time-division controlled for each light projecting / receiving unit 7.
  • the light from the light projecting unit 9 does not exist between the light projecting and receiving units 7 simply by arranging a plurality of sets of the light projecting and receiving units 7 at the end of the sliding door 3 on the entrance 1 side. Detection range can occur.
  • a method of partially overlapping the detection ranges of the light emitting / receiving units 7 adjacent in the vertical direction (first method)
  • the arrangement of the light projecting unit 9 and the light receiving unit 10 of the unit 7 is turned upside down so that the traveling direction of the light emitted from each light projecting unit 9 is turned upside down (second method), one light receiving unit
  • second method a method in which light emitted from a plurality of light projecting units 9 is received in 10 is conceivable.
  • the light projecting unit 9 or the light receiving unit 10 of another light projecting / receiving unit 7 is arranged between the light projecting unit 9 and the light receiving unit 10 of the predetermined light projecting / receiving unit 7.
  • the detection ranges of the two light emitters / receivers 7 overlap.
  • the operation of each light emitting / receiving unit 7 is controlled in time division by the control CPU 11 or adjacent light emitting / receiving units It is also possible to dispose part 7 in the direction of entry / exit.
  • the light receiving unit 10 of the predetermined light projecting / receiving unit 7 receives the light from the light projecting unit 9 of the light projecting / receiving unit 7, and the other light projecting / receiving unit It is configured to receive light from 7 light projecting parts 9 as well.
  • the control CPU 11 causes the light projecting unit 9 and the light receiving unit 1 for each combination of the predetermined light projecting / receiving unit 7 and the other light projecting / receiving unit 7. It is necessary to control the zero operation in a time-sharing manner to prevent erroneous detection.
  • the first to third methods can be applied only to the light projecting / receiving unit 7 arranged in a part of the range. Further, for example, the first method and the second method may be used in combination to reliably prevent the occurrence of a non-detection range.
  • the light projecting unit 9 is provided with an optical axis setting hood from a light emitting element to an irradiation opening for irradiating a light beam at a predetermined angle in a parallel mirror space, and an optical axis of the light beam. And an optical control mechanism for controlling, and configured to irradiate light rays accurately at a set angle. Further, the light projecting unit 9 is provided with a mechanism for narrowing the width of the irradiated light beam to a predetermined value or less so that even a small object can be detected.
  • the shape of the optical axis setting hood is configured so that it is wider in the entrance / exit direction of the entrance / exit 1 than the direction in which the light emitted from the light projecting section 9 is reflected and reflected, so It is possible to take measures to prevent non-detection of small obstacles due to interference or wraparound, and to ensure sufficient tolerance for installation accuracy in the direction of entry and exit.
  • the light source in the light projecting unit 9 for example, an LED, a laser, a light bulb or the like is used.
  • each component of the reflector 4 and the light projector / receiver 5 may have wavelength selectivity corresponding to the wavelength band of the light beam used in the door sensor device.
  • the light receiving unit 10 is provided with wavelength selection means such as a cover, a film, or a coating that transmits only a predetermined band including the wavelength band of the light beam from the light projecting unit 9, or the reflection mirrors 6 and 8 This is realized by covering each reflecting surface with the wavelength selecting means.
  • the reflecting surfaces of the reflecting mirrors 6 and 8 may be provided with a coating for preventing scratches and dirt.
  • a removing means for filtering the signal detected by the light receiving unit 10 into a signal of only a specific modulation band and removing components other than the predetermined modulation band of the signal. Therefore, it is possible to prevent erroneous detection.
  • the obstacle at the entrance and exit that is opened and closed by the sliding door can be detected at low cost and with high accuracy, and the entrance of the building can be detected. It can be applied to door sensor devices installed in various places such as elevator platforms.

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  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Abstract

L'invention concerne un dispositif de capteur pour une porte capable de détecter de façon non coûteuse et précise un obstacle dans une entrée de porte qui est ouverte et fermée par une porte coulissante. Un premier miroir de réflexion est disposé sur un côté de l'entrée de porte et un projecteur/récepteur de lumière est placé sur l'autre côté de l'entrée de porte avec l'entrée de porte entre eux. Le projecteur/récepteur de lumière a un second miroir de réflexion dirigé vers le premier miroir de réflexion, une section de projection de lumière placée au-dessus du second miroir de réflexion, et une section de réception de lumière placée au-dessous du second miroir de réflexion. Le projecteur/récepteur de lumière est fabriqué de telle sorte qu'un faisceau lumineux émis à partir de la section de projection de lumière est reçu par la section de réception de lumière après avoir été réfléchi de nombreuses fois par les premier et second miroirs de réflexion. Lorsque le faisceau lumineux émis à partir de la section de projection de lumière n'est pas reçu par la section de réception de lumière, le dispositif de capteur pour une porte détecte la présence d'un obstacle dans l'entrée de porte.
PCT/JP2006/318234 2006-09-14 2006-09-14 Dispositif de capteur pour porte WO2008032380A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2006/318234 WO2008032380A1 (fr) 2006-09-14 2006-09-14 Dispositif de capteur pour porte

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2006/318234 WO2008032380A1 (fr) 2006-09-14 2006-09-14 Dispositif de capteur pour porte

Publications (1)

Publication Number Publication Date
WO2008032380A1 true WO2008032380A1 (fr) 2008-03-20

Family

ID=39183454

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2006/318234 WO2008032380A1 (fr) 2006-09-14 2006-09-14 Dispositif de capteur pour porte

Country Status (1)

Country Link
WO (1) WO2008032380A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110687615A (zh) * 2019-09-19 2020-01-14 惠安江森水产设备开发有限公司 一种新型光电感应器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0896262A (ja) * 1994-09-22 1996-04-12 Sanyo Electric Co Ltd 物体検出方法及びこれを用いた物体検出素子
JPH09260466A (ja) * 1996-03-21 1997-10-03 Metsukusu:Kk 薄型基板またはウェハ検出装置
JPH10184194A (ja) * 1996-10-31 1998-07-14 Opt Kk 自動扉の安全補助装置
JPH11126550A (ja) * 1997-10-22 1999-05-11 Myucom:Kk 物体通過検出器
JPH11173044A (ja) * 1997-12-16 1999-06-29 Bunka Shutter Co Ltd 障害物監視装置
JP3234530B2 (ja) * 1996-04-26 2001-12-04 株式会社ナブコ ドア用センサの自己診断装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0896262A (ja) * 1994-09-22 1996-04-12 Sanyo Electric Co Ltd 物体検出方法及びこれを用いた物体検出素子
JPH09260466A (ja) * 1996-03-21 1997-10-03 Metsukusu:Kk 薄型基板またはウェハ検出装置
JP3234530B2 (ja) * 1996-04-26 2001-12-04 株式会社ナブコ ドア用センサの自己診断装置
JPH10184194A (ja) * 1996-10-31 1998-07-14 Opt Kk 自動扉の安全補助装置
JPH11126550A (ja) * 1997-10-22 1999-05-11 Myucom:Kk 物体通過検出器
JPH11173044A (ja) * 1997-12-16 1999-06-29 Bunka Shutter Co Ltd 障害物監視装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110687615A (zh) * 2019-09-19 2020-01-14 惠安江森水产设备开发有限公司 一种新型光电感应器
CN110687615B (zh) * 2019-09-19 2021-06-01 威海市金承电子有限公司 一种新型光电感应器

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