WO2008032380A1

WO2008032380A1 - Door sensor device

Info

Publication number: WO2008032380A1
Application number: PCT/JP2006/318234
Authority: WO
Inventors: Yoshiyuki Uchida
Original assignee: Mitsubishi Electric Corporation
Priority date: 2006-09-14
Filing date: 2006-09-14
Publication date: 2008-03-20

Abstract

A door sensor device capable of inexpensively and accurately detecting an obstacle at a doorway opened and closed by a slide door. A first reflection mirror is provided on one side of the doorway and a light projector/receiver is placed on the other side of the doorway with the doorway in between the them. The light projector/receiver has a second reflection mirror facing the first reflection mirror, a light projection section placed above the second reflection mirror, and a light receiving section placed below the second reflection mirror. The light projector/receiver is constructed such that a light beam emitted from the light projection section is received by the light receiving section after being reflected multiple times by the first and second reflection mirrors. When the light beam emitted from the light projection section is not received by the light receiving section, the door sensor device detects the presence of an obstacle on the doorway.

Description

Specification

Door sensor device

Technical field

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. Background art

[0002] 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.

As such 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. However, 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. In addition, the light emitting element and

When Z or light receiving element force ^s is provided on the end face of the sliding door, etc., the light receiving state deteriorates due to rattling of the sliding door during the closing operation, which may cause false detection.

[0004] In order to solve the above problem, 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. There has been proposed a door sensor device in which a reflector to be arranged is arranged (see, for example, Patent Document 1). In such a door sensor device, 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

Disclosure of the invention Problems to be solved by the invention

[0006] In the door sensor device described in Patent Document 1, the light force from the light emitting element reflected by the reflector is directly incident on the light receiving element. For this reason, when it is necessary to detect a wide range (especially in the vertical direction) where the range in which an obstacle can be detected by light from one light emitting element is required, a large number of light emitting elements and light receiving elements are required. This was a factor incurring high costs. In order to reduce the cost in the door sensor device, it is necessary to reduce the number of light emitting elements or light receiving elements. However, when the number of light emitting elements and Z or light receiving elements is reduced, the detection accuracy may be greatly deteriorated.

[0007] 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.

Means for solving the problem

[0008] The door sensor device according to the present invention 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. And a light receiving unit that receives light from the light projecting unit reflected a plurality of times by the reflecting mirror.

The invention's effect

[0009] According to the present invention, obstacles at the entrance and exit that are opened and closed by the slide door can be detected at low cost and with high accuracy.

Brief Description of Drawings

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,

5 Emitter / Receiver, 6 Reflector, 7 Emitter / Receiver, 8 Reflector,

9 Emitter, 10 Receiver, 11 Control CPU, 12 Receiver,

13 Condenser

BEST MODE FOR CARRYING OUT THE INVENTION

[0012] In order to explain the present invention in more detail, it will be described with reference to the accompanying drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the duplicated explanation is appropriately simplified or omitted.

Embodiment 1.

FIG. 1 is a front view showing a door sensor device according to Embodiment 1 of the present invention, and FIG. 2 is a diagram showing an operation of the door sensor device according to Embodiment 1 of the present invention. First, based on FIG. 1, the configuration of a door sensor device that detects an obstacle at an entrance that is opened and closed by a sliding door will be described.

[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. Here, 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. Here, 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. In addition, 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.

[0016] In 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. That is, in the door sensor device described above, 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. It should be noted that 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 It goes without saying that 10 allows more rays to cross the doorway 1. In the door sensor device configured as described above, since 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.

In the door sensor device having the above-described configuration, 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. On the other hand, 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). . Note that when the parallelism of the force reflecting mirrors 6 and 8 is completely zero, the incident angle does not change. Here, FIG. 2 shows a case where the reflection mirrors 6 and 8 are installed with a predetermined installation error angle. In FIG. 2, α 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, and β is the installation error angle of the reflecting mirror 6 to the reflecting mirror 8 mm. is there. Depending on the installation state of the reflecting mirrors 6 and 8, 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. However, when 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 α + η | 8. Here, η 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.

That is, when an obstacle is detected by the door sensor device having the above-described configuration, 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. Note that 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. For this reason, 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. When 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. However, a condensing unit 13 is provided 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.

Next, a specific configuration of the light receiving unit 10 having the above function will be described.

In order to reliably receive the light emitted from the light projecting unit 9 even when the slide doors 2 and 3 move, the light receiving unit 10 has, for example, a condensing range of the light converging unit 13 from the light projecting unit 9. When 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. Note that 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. Here, 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.

[0022] In order to realize the above function, it is necessary to perform a process that enables multiple incidences on the condensing unit 13 by configuring the condensing range of the condensing unit 13 with a single mirror or the like. Become. For example, 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. Further, 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. Set to.

In order to facilitate the installation of the door sensor device, 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.

[0024] When 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.

[0025] 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. However, when detecting obstacles over a wide range of entrance / exit 1, there is a limit to the detection range of one set of light projecting / receiving unit 7, so the entrance / exit 1 side end of sliding door 3 is limited. Multiple sets of light emitting / receiving sections 7 need to be arranged one above the other. In order to prevent erroneous detection caused by the light receiving unit 10 of the other light projecting / receiving unit 7 receiving the light emitted from the light projecting unit 9 of the light projecting / receiving unit 7, the 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.

[0026] Further, 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. In order to prevent the occurrence of such a non-detection range, for example, 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 For example, a method (third method) in which light emitted from a plurality of light projecting units 9 is received in 10 is conceivable.

[0027] In the first method, for example, 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. As a result, the detection ranges of the two light emitters / receivers 7 overlap. In such a case, in order to prevent erroneous detection between the two light emitting / receiving units 7 whose detection ranges 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.

[0028] In the third method, for example, 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. In such a case, 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.

[0029] It should be noted that in order to increase the detection accuracy of a predetermined range of the entrance / exit 1, 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.

Here, 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. As the light source in the light projecting unit 9, for example, an LED, a laser, a light bulb or the like is used.

[0031] Further, in order to prevent erroneous detection, 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. Specifically, 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. It should be noted that the reflecting surfaces of the reflecting mirrors 6 and 8 may be provided with a coating for preventing scratches and dirt.

[0032] Further, it is provided with a removing means (not shown) 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.

Industrial applicability

[0033] As described above, according to the door sensor device that is effective in the present invention, 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.

Claims

The scope of the claims

[1] In a door sensor device that detects an obstacle at an entrance that is opened and closed by a sliding door,

A first reflecting mirror provided on one side of the doorway;

A light emitting and receiving part provided on the other side of the entrance;

With

The light emitting / receiving unit is

A second reflecting mirror that faces the first reflecting mirror with the doorway interposed therebetween, and is disposed either above or below the second reflecting mirror, to the first reflecting mirror and the second reflecting mirror. A light projecting unit that irradiates a light beam crossing the doorway in the sandwiched space;

A light receiving portion that is disposed on the other of the upper and lower sides of the second reflecting mirror and receives a light beam of the light projecting portion force reflected a plurality of times by the first reflecting mirror and the second reflecting mirror;

A door sensor device comprising:

[2] At least one of the first reflection mirror and the light projecting / receiving unit is provided at the end of the sliding door,

The light receiver

A photoreceptor that receives the light emitted from the light projecting unit;

Even if the distance between the first reflecting mirror and the light projecting / receiving unit is changed with the movement of the slide door, the first reflecting mirror and the second reflecting mirror are arranged on the other upper and lower sides of the second reflecting mirror. A condensing unit that condenses the light of the light projecting unit reflected by the mirror a plurality of times and causes the light receiver to receive the light.

The door sensor device according to claim 1, further comprising:

[3] The condensing unit collects at least two light beams with the light projecting unit force reflected by the first reflecting mirror and the second reflecting mirror multiple times when the condensing range is fully opened. The door sensor device according to claim 2, wherein the door sensor device has a predetermined vertical width.

[4] The light-receiving unit is a light-projecting unit that is reflected multiple times by the first and second reflecting mirrors. 4. The door sensor device according to claim 3, further comprising display means for displaying that the light is incident on a light converging range of at least two light power condensing units.

[5] The condensing unit separates the light from the light projecting unit reflected a plurality of times by the first reflecting mirror and the second reflecting mirror into transmitted light and reflected light, and receives the transmitted light by the photoreceptor. And having a separation function of reflecting the reflected light toward the first reflecting mirror, and the reflected light further reflected by the first reflecting mirror is collected in the light collecting unit when the sliding door is fully opened. Light is received by the photoreceptor

The door sensor device according to any one of claims 2 to 4, wherein the door sensor device is provided.

[6] A plurality of sets of light projecting / receiving units are provided on the other side of the entrance that is opened and closed by the sliding door, and the light collecting unit of the predetermined light projecting / receiving unit is reflected by the first reflecting mirror and the second reflecting mirror a plurality of times. The light from the light projecting unit of the predetermined light projecting and receiving unit is separated into transmitted light and reflected light, and the transmitted light is received by the light receiving body of the predetermined light projecting and receiving unit, and the reflected light is Has a separation function to reflect toward the first reflecting mirror,

The reflected light further reflected by the first reflecting mirror is received by a light receiving body of another light projecting / receiving unit different from the predetermined light projecting / receiving unit that received the transmitted light.

[7] A plurality of light projecting / receiving units are provided on the other side of the entrance that is opened and closed by the sliding door, and the operations of the light projecting unit and the light receiving unit are time-division controlled for each light projecting / receiving unit.

The door sensor device according to any one of claims 1 to 6, wherein the door sensor device is provided.

[8] Claims 1 to 4, wherein a plurality of light projecting and receiving parts are provided on the other side of the entrance that is opened and closed by the sliding door, and the detection ranges of at least two light projecting and receiving parts overlap in the vertical direction. Item 8. The door sensor device according to any one of Items 7 to 8.

[9] Multiple sets of light projecting / receiving units are provided on the other side of the doorway that is opened and closed by the sliding door, and the two light projecting / receiving units adjacent to each other in the upper and lower sides are arranged upside down. The door sensor device according to any one of claims 1 to 7, characterized by:

[10] A plurality of light projecting and receiving units are provided on the other side of the entrance that is opened and closed by the slide door, and the light receiving unit of the predetermined light projecting and receiving unit receives light from the light projecting unit of the predetermined light projecting and receiving unit In addition, the light beam of the light projecting part power of another light projecting / receiving part different from the predetermined light projecting / receiving part Receive light,

The operations of the light projecting unit and the light receiving unit are time-division controlled for each yarn combination of the predetermined light projecting / receiving unit and the other light projecting / receiving unit.

The door sensor device according to any one of claims 1 to 7, wherein the door sensor device is provided.

[11] The floodlight

An optical axis setting hood up to the light emitting element force irradiation opening for irradiating light at a predetermined angle in a space between the first reflecting mirror and the second reflecting mirror;

An optical control mechanism for controlling the optical axis of the light beam;

11. The door sensor device according to claim 1, further comprising:

12. The door sensor device according to claim 11, wherein the shape of the optical axis setting hood is wider in the entrance / exit direction of the entrance / exit than the direction in which the light beam irradiated from the light projecting part reflects and travels. Place.

[13] The first reflecting mirror and the second reflecting mirror are characterized in that each reflecting surface is covered with wavelength selecting means that transmits only a predetermined wavelength band including a wavelength band of a light beam from the light projecting unit. Item 13. The door sensor device according to any one of Items 1 to 12.

[14] The light receiving unit according to any one of claims 1 to 13, wherein the light receiving unit includes a wavelength selection unit that transmits only a predetermined wavelength band including a wavelength band of a light beam from the light projecting unit. The door sensor device.

[15] Removal means for removing components other than the predetermined modulation band from the signal detected by the light receiving unit

The door sensor device according to any one of claims 1 to 14, further comprising: