JP2009092536A - Active object detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an active object detector where workability is improved by allowing easy setting of a string of effective detection areas. <P>SOLUTION: The active object detector includes a projector 1 for transmitting detection wave for object detection towards a plurality of detection areas A1-A5, and a photodetector 2 for receiving detection wave reflected by the object and generating a light receiving signal. The detection areas A1-A5 are arranged from a position close to the projector 1 toward a position far from it in a plurality of strings, and the photodetector 2 has a plurality of different light receiving elements 8A-8F for receiving light in each of the detection areas A1-A5. The active object detector further includes a detection reporting means 19 for generating light of different color or different sound in each of the detection areas A1-A5 when light receiving elements 8A-8F corresponding to respective strings of the detection areas A1-A5 output a light receiving signal. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention transmits an object detection wave toward a plurality of detection areas, and an object such as a human body is detected when a light reception signal generated when receiving a detection wave reflected by the object exceeds a set level. The present invention relates to an active object detection device for detection.

Conventionally, it has been equipped with a projector that sends detection waves such as near-infrared rays toward the detection area, and a receiver that receives the detection waves reflected by the object and generates a light reception signal. In order to set a plurality of detection areas, one light projecting element that projects light for each column of the detection area is assigned to the projector, and one light reception that receives light for each column of the detection area is assigned to the light receiver. An active object detection device to which elements are assigned is known (Patent Document 1). This active object detection device is provided with a manual dip switch for individually switching the light projecting element and the light receiving element corresponding to each column of the detection area to be either activated or deactivated. At the time of construction, the light projecting element and the light receiving element corresponding to the detection area where the object is not desired to be detected are set to be inoperative by turning off the dip switch according to the installation environment. When setting unnecessary detection areas by the dip switch, the detection areas of each row described in the instruction manual are set based on the distance from the device.
JP 2002-285755 A

  However, the instruction manual of the device only describes the distance from the device in the detection area of each row based on the typical installation height and angle, and the installation height is different from that described in the instruction manual. When it is attached at a sheath angle, the separation distance from the device in the detection area of each row changes accordingly, which is different from the description in the instruction manual. Therefore, in actuality, the device detects the human body when the builder actually walks toward the device while setting the light emitting device and the light receiving device to be activated or deactivated one row at a time by the switching operation of the dip switch. The operation of confirming the row of detection areas to be performed is repeated many times to find a detection area in which the “stepping amount” that is the distance from the device is optimal. Therefore, it takes a lot of time and labor to set up the detection area columns to effectively function excluding unnecessary detection areas. Becomes longer.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an active object detection device that can easily set a row of effective detection areas to improve workability.

  In order to achieve the above object, an active object detection device according to the present invention includes a projector that sends detection waves for object detection toward a plurality of detection areas, and a light reception signal that receives the detection waves reflected by the object. The detection area is arranged in a plurality of rows from a position close to the projector to a position far from the projector, and the light receiver is arranged in each row of the detection area. A plurality of different light receiving elements for receiving each light, and when the light receiving elements corresponding to the respective columns of the detection area output light reception signals, Detection notification means for generating different sounds is provided.

  According to this configuration, after the installation of the device is completed, for example, when the installer walks from the location away from the device toward the device, the detection notification means displays when the location where the detection operation is desired is reached. The color or generated sound can be used to immediately and accurately know the number of effective detection areas to be detected and activated. Since it is not necessary to pay attention to the mounting height and mounting angle in order to optimize, the workability is improved.

  In the present invention, when a plurality of light receiving elements corresponding to the plurality of rows of the detection area output light reception signals, light or sound of a color corresponding to the row of the detection areas closer to the projector is emitted. It is preferable to provide priority notification means that is generated by the detection notification means. Thereby, when walking toward the device from a place away from the attached device, even if detected in a plurality of detection areas, from the detection notification means, the row of detection areas closer to the device, That is, since the display color or the notification sound of the row corresponding to the true “depression amount” is generated, it is possible to accurately know the row of the detection area to be effectively detected and operated.

  In the present invention, it is preferable to further include a mode switching means for switching between a normal detection mode in which the detection notification means is not operated and an area row setting mode in which the detection notification means is operated. As a result, after setting and setting the area row setting mode at the time of construction to find and set the valid detection area row, it is only necessary to switch to the normal detection mode, and the detection notification means is not normally operated wastefully. I'm sorry.

  In the present invention, the projector includes a plurality of different light projecting elements that project light for each column of the detection area, and further operates for each of the light projecting element and the light receiving device corresponding to each column of the detection area. It is preferable to provide an on / off setting means for switching between inactive states. As a result, the light emitting element and the light receiving element corresponding to the row of the detection area that is not desired to be detected and activated after the detection area row to be activated by the display color of the detection notification means or the notification sound is set to ON / OFF. If it is turned off by the means and set to inoperative, unnecessary light projecting elements and light receiving elements can be prevented from operating wastefully.

  In the present invention, if the plurality of detection areas are set in the vicinity of the automatic door, the automatic door is opened with the most preferable “stepping amount” at which a human body approaching the automatic door reaches a predetermined row in the detection area. be able to.

  According to the active object detection of the present invention, when a light receiving element corresponding to each column of the detection area outputs a light reception signal, detection that generates different color light or different sound for each column of the detection area. Since the notification means is provided, it is possible to immediately and accurately know from which display row or notification sound the number of detection areas to be activated is.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, the detection area will be described prior to the description of the configuration of the active object detection device according to the first embodiment of the present invention. In the first embodiment, a case where the automatic opening / closing door opening / closing control apparatus is activated is illustrated as an example. FIG. 4A is an explanatory diagram of a detection area viewed from the sliding direction of the automatic opening / closing door 18. FIG. 2B is a plan view showing the detection area. The active object detection device 100 is attached to the side surface of the eyeless 50, and as shown in FIG. 5A, the detection areas A1 to A5 are 5 from a position close to the active object detection device 100 installed to a position far from the position. The detection areas A1 to A5 in each row are each composed of 12 areas as shown in (b). And in this active type object detection apparatus 100, when the detection alerting means mentioned later detects the object which exists in detection area A1-A5 of each row | line | column, a color which is different for every row | line | column of the detection area A1-A5. It is designed to generate light. In this embodiment, as shown in (b), when detection detection means 19 to be described later detects in the detection area A1 of the first row, red, yellow in the detection area A2 of the second row, the third row The detection area A3 emits purple, the fourth detection area A4 is light blue, and the fifth detection area A5 is orange.

  FIG. 1 is a block diagram showing an electrical configuration of an active object detection apparatus 100 according to the first embodiment of the present invention. The active object detection device 100 includes a projector 1 that projects near infrared rays, which are a kind of detection waves for object detection, toward a detection area set in five rows from a position close to the projector 1 toward a position far from the projector 1. And a light receiver 2 that receives a detection wave reflected by the object and generates a light reception signal. The detector 1 includes first to fifth rows of light projecting elements 3A to 3E made of infrared light emitting diodes that send out near infrared rays as detection waves, and near infrared rays sent from the light projecting elements 3A to 3E. Each of the light projecting elements 3A to 3E includes a microcomputer. The control unit 10 includes a microcomputer. Are controlled individually by the drive circuit 7.

  The light receiver 2 receives different first to fifth light-receiving elements 8A to 8E that receive light for each of the five detection areas, and the near-infrared rays reflected from the detection areas of the respective lines. And a light receiving optical system 9 composed of a light receiving lens that collects light so as to be incident on 8E. The light receiving signals output from the light receiving elements 8A to 8E in each column are individually amplified by the amplifier circuit 11. After that, sampling signals sampled by the sample hold circuit 12 and sampled for each of the light receiving elements 8A to 8E are individually output to the control unit 10.

  The control unit 10 instructs the drive circuit 7 to drive only the light emitting elements 3 </ b> A to 3 </ b> E corresponding to the row of detection areas set to ON by the detection area ON / OFF switch 13. Further, the control unit 10 determines whether or not the sampling signal individually input from the sample and hold circuit 12 for each of the light receiving elements 8A to 8E in each column exceeds the set level by using the received light level determining unit 10a. When it is determined that the threshold value is exceeded, an object detection signal is output to the opening / closing control device 17 of the automatic opening / closing door 18. Further, the control unit 10 outputs a sampling signal exceeding the set level when the area row setting mode is set and input by the manual mode changeover switch 14 for switching between the normal detection mode and the area row setting mode. The number of the light receiving element is determined, and the display control signal of the specific display color set in the determined detection area column is output to the detection notification means 19, while the set level is exceeded. When it is determined that the light receiving elements that output the sampling signal are two columns, the priority notification means 10b is a display control signal of a specific display color set in the column of the detection area closer to the projector 1 Is output to the detection notification means 19.

  The detection notification means 19 includes a red light emitting LED 21A, a green light emitting LED 21B, and a blue light emitting LED 21C, and a display color indicated by a display control signal input from the control unit 10 and a light emitting display 21 that emits and displays a required display color. The LED light emission control circuit 20 that controls the light emission of the required ones of the light emitting LEDs 21A to 21C. That is, although details will be described later, in this embodiment, a different display color is set for each column of the detection area, and the light emitting display 21 displays the display indicated by the display control signal input from the control unit 10. One or more of the LEDs 21A to 21C are caused to emit light so that a color is generated by a single color or a mixed color.

  The opening / closing control device 17 for the automatic opening / closing door 18 installed outside the active object detection device 100 includes an activation circuit 22 that outputs a door opening signal when an object detection signal is input from the control unit 10, and the automatic opening / closing door 18. And a door engine controller 23 for opening the door engine 24 when a door opening signal is received from the activation circuit 22.

  In addition, the detection notification means 19 further receives signals from the sound generation unit 27 and the sound generation unit 27 that generate several kinds of intermittent sounds with different intervals or the numbers of the detection area columns from the voice synthesis IC as synthesized voice signals. You may provide the utterance part 28 like a speaker which receives and utters. Thereby, when the number of rows of detection areas to be set increases, for example, the row of the detection areas far from the device is notified by intermittent sounds having different periods, so that the installer can be notified accurately. Instead of intermittent sounds, synthesized speech such as “first row” and “second row” can be generated. Further, the sound emission unit 27 and the utterance unit 28 may be provided without the LED light emission control circuit 20 and the light emission display 21.

  2A is a perspective view of the active object detection device 100, and FIG. 2B is a state in which a cover 30 and a window (not shown) inside the device body 29 of the active object detection device 100 are removed. FIG. As shown in FIG. 2B, the active object detection device 100 includes first and second light projections constituting the light projecting optical system 4 in FIG. 1 on the lower surface side of the device body 29 (the labor side in the drawing). The optical lenses 4A and 4B are disposed apart from each other in the horizontal direction X, which is a horizontal direction parallel to the attachment surface 29a of the apparatus body 29 to the eyeless 50 (FIG. 4A). First and second light receiving lenses 9A and 9B constituting the optical system 9 are arranged. The first light projecting lens 3A and the first light receiving lens 9A in FIG. 2B set the first to third detection areas A1 to A3 in FIG. 4, and the second light projecting lens lens in FIG. 2B. The 3B and the second light receiving lens 9B set the fourth and fifth detection areas A4 and A5 of FIG.

  Further, a detection area on / off switch 13 which is an on / off setting means for selecting detection operation and non-operation of the detection areas A1 to A5, and a mode switch 14 are provided on the front outer surface of the apparatus main body 29. Is provided. The detection area on / off switch 13 has five switches for individually switching between activation and deactivation of the five light emitting elements 3A to 3E and the light receiving elements 8A to 8E corresponding to the respective columns of the five detection areas A1 to A5. have. Labels L1 to L5 on which display colors corresponding to the rows of detection areas A1 to A5 are printed are attached to the vicinity of each switch. Further, a light emitting display 21 is provided on the left side of the row of lenses 3A, 3B, 9A, 9B of the apparatus main body 29, and at a position facing the light emitting display 21 in the cover 30 of FIG. A display window 31 is provided.

  FIGS. 3A and 3B are a front view and a bottom view of the apparatus main body 29 with the window and cover 30 removed. As shown in FIG. 3A, a printed wiring board 32 is disposed above the lens rows 4A, 4B, 9A, 9B in the apparatus main body 29. In the printed wiring board 32, as shown in FIG. 3 (b), first to third rows in which three each are arranged in a row along the lateral direction X corresponding to the first light projecting lens 4A. The fourth and fifth row light projecting elements 3D and 3E are mounted with the eye light projecting elements 3A to 3C, and each of the third light projecting elements 3A to 3C are arranged in a line along the lateral direction X in correspondence with the second light projecting lens 4B. Are mounted, and first to third row light receiving elements 8A to 8C, each of which is arranged in a line along the horizontal direction X, corresponding to the first light receiving lens 9A, are mounted, and the second light receiving lens 9B. The fourth and fifth row light receiving elements 8D and 8E, each of which is arranged in a line along the horizontal direction X, are mounted. Each of the lenses 4A, 4B, 9A, and 9B is divided into four, and four detection areas are assigned to each of the light projecting elements 3A to 3E and the light receiving elements 8A to 8E. Therefore, the first to fifth light projecting elements 3A to 3E and the first to fifth light receiving elements 8A to 8E, which are arranged in three for each column, correspond to the corresponding lenses 4A, 4B, and 9A. , 9B, five rows of detection areas A1 to A5 including 12 (= 3 × 4) detection areas in each row are set.

  FIG. 5 is a flowchart showing the control processing of the control unit 10, and the operation of the active object detection device 100 will be described with reference to FIG. The control unit 10 in FIG. 1 determines whether or not the normal detection mode is set and input from the mode changeover switch 14 (step S1 in FIG. 5). Now, it is assumed that the area row setting mode has been set and input in order to set an effective detection area after the active object detection device 100 is attached to the eyeless 50 of the automatic opening / closing door 18. In that case, the control unit 10 determines that the area row setting mode is set by the mode changeover switch 14 and sets the area row setting mode (step S2). Subsequently, the control unit 10 waits for a light receiving signal (in this case, a sampling signal) of a set level or higher to be input from the sample hold circuit 12 of FIG. 1 (step S3).

  As shown in FIG. 4 (b), the active object detection device 100 attached by the installer H, that is, walks toward the automatic opening / closing door 18 as indicated by an arrow from a position far from the automatic opening / closing door 18, When the fifth row detection area A5 is reached, the sampling signal of the light reception signal output from the fifth row light receiving element 8E exceeds the set level, and the control unit 10 that has determined this sampling exceeds the set level. Based on the signal level of the input terminal to which the signal is input, it is determined whether or not the light receiving signals from the plurality of light receiving elements 8D including the fifth column exceed the set level (step S4).

  When no light reception signal is input from the light receiving elements of the plurality of rows, an orange display control signal indicating the fifth row is output to the LED light emission control circuit 20 of the detection notification means 19 (step S5). The LED light emission control circuit 20 causes a required one of the light emitting diodes 21 </ b> A to 21 </ b> C to emit light and displays the orange color on the light emitting display 21. Here, in the case where the fifth detection area A5 is a detection area that the installer H wants to make effective, the builder H tries to remember the orange color displayed on the light-emitting indicator 21, but the fifth detection area A5 is the desired depression position. If it is not the detection area, the step further proceeds toward the automatic opening / closing door 18.

  Then, as shown in FIG. 4A, when the contractor H enters the fourth detection area A4, the fifth row light receiving element 8E receiving the near infrared ray reflected from the upper half of the contractor H, and the construction Light receiving signals exceeding the set level are input to the control unit 10 from both of the fourth row light receiving elements 8D that have received near infrared rays reflected from the lower half of the person H. When the control unit 10 determines that the light reception signals of the plurality of light receiving elements 8E and 8D exceed the set level (step S4), the priority notification unit 10B is closer to the projector 1 in the two detection areas A5 and A4. The fourth detection area A4 is prioritized, and a light blue display control signal indicating the light reception of the fourth row light receiving element 8D is output to the LED light emission control circuit 20 of the detection notification means 19 (step S6). The LED light emission control circuit 20 causes a required one of the light emitting diodes 21 </ b> A to 21 </ b> C to emit light and displays a light blue color on the light emitting display 21. Here, in the case where the fourth detection area A5 is a detection area that the installer H wants to make effective, the installer H learns the light blue displayed on the light-emitting indicator 21, but the fourth detection area A4 is a desired depression position. If it is not the detection area, the step further proceeds toward the automatic opening / closing door 18. In this way, the installer H learns the display color of the light emitting display 21 when reaching the detection areas A1 to A5 that are desired to be effective.

  If the contractor H learns the display colors corresponding to the detection areas A to A5 that he / she wants to make effective, he / she can see the display colors of the labels L1 to L5 in the vicinity of the detection area on / off switch 13 and remember them. The switches corresponding to the detection areas A1 to A5 farther from the device 100 than the displayed color are set to OFF. After outputting the display control signal to the light emitting display 21, the control unit 10 determines whether any switch in the detection area / on / off switch 13 is turned off (step S <b> 7). Then, the light projecting elements 3A to 3E and the light receiving elements 8A to 8E in the column corresponding to the switch switched off are set to non-operation (step S8). After that, it is determined whether or not the mode switch 14 has been switched (step S9), and any of the detection area on / off switch 13 is determined until it is determined that the mode switch 14 has been switched to the normal mode. It is monitored whether or not the switch is switched (step S7).

  The installer H finishes setting the effective detection areas A1 to A5 that should detect the object by performing an operation of excluding the detection areas A1 to A5 that do not require detection of the object by turning on the detection area on / off switch. Since the mode changeover switch 14 is switched to the normal mode, the control unit 10 sets the normal detection mode (step S10) when determining that the mode changeover switch 14 has been changed (step S9). In this normal detection mode, the control unit 10 always determines whether or not the sampling signal of the light reception signal output from any one of the light receiving elements 3A to 3E exceeds the set level (step S11). When the determination is made, an object detection signal is output to the opening / closing control device 17. Upon receiving this object detection signal, the opening / closing control device 17 opens the automatic opening / closing door 18.

  In the case where the active object detection device 100 is set to only the effective detection areas A1 to A5 by disabling the unnecessary detection areas A1 to A5 after the attachment is completed, as shown in FIG. For example, if the installer walks from the place away from the apparatus 100 toward the apparatus 100 and reaches the place where the detection operation is desired, the display color of the light emitting display 21 of the detection notification means 19 is remembered. In addition, among the display colors of the level L1 to L5 in the vicinity of each switch of the detection area on / off switch 13 of the device 100, the switch in the direction away from the device 100 is turned off with respect to the switch of the display color that is remembered by itself. By simply doing this, it is possible to immediately and accurately set an effective detection area that is desired to be detected and acted on, and it depends on the mounting height and mounting angle when the apparatus 100 is installed. Since not so Dekiru mounting without note device to the mounting height and mounting angle, workability is improved. The labels L1 to L5 may be omitted, and in that case, the relationship between the display color by the light emitting display 21 and the detection areas A to A5 is described in the instruction manual.

  Conventionally, when the object detection signal is frequently erroneously output after the detection areas A1 to A5 are once set, it is not easy to find the detection area causing the malfunction. For example, after setting the detection areas A1 to A5, a flower pot may be placed in a certain detection area, and a flower or tree planted in the flower pot may be erroneously detected as an object by shaking with the wind. In the active object detection device 100 of the first embodiment, when the above-described erroneous detection frequently occurs, when the mode changeover switch 14 is switched to the area row setting mode, the detection notification means 19 Since the display color corresponding to the row of the detection area erroneously detected is displayed on the light emitting indicator 21, the row of the detection area where the erroneous detection has occurred can be immediately confirmed. It can be suitably used for the purpose of quickly finding the cause of false detection.

  In addition, when the installer H is detected across the plurality of detection areas A1 to A5 and the light reception signals of the plurality of light receiving elements 8A to 8E simultaneously exceed the set level, the priority notification means 10B of the control unit 10 Since the display control signal of the display color corresponding to the row of the detection areas A1 to A5 closer to the projector 1 is output, the row of the detection areas A1 to A5 closer to the projector 100, that is, the true “depression amount” ( The display color of the row corresponding to ST) in FIG. 4 is displayed, or a notification sound is produced, and the row of detection areas A1 to A5 to be effectively detected and operated can be accurately known.

  Further, since the mode switching means 14 for switching between the normal detection mode and the area row setting mode is provided, the row of the detection areas A1 to A5 that are set and effective by setting the area row setting mode 14 at the time of construction is found. If the detection mode is switched to the normal detection mode, the detection notification unit 19 can be prevented from performing unnecessary operations. Further, since the light projecting elements 3A to 3E and the light receiving elements 8A to 8E corresponding to the rows of the detection areas A1 to A5 that are not desired to be actuated are switched by the on / off setting means, the unnecessary light projecting elements are set. 3A to 3E and the light receiving elements 8A to 8E can be prevented from operating wastefully.

  FIG. 6 is a perspective view of the active object detection device 110 according to the second embodiment of the present invention as seen from below, and FIG. 7 is a bottom view of the object detection device 110. (Not shown) is removed. The object detection device 110 according to the second embodiment is a type that is attached downward on a ceiling or the like, and the upper surface of the device main body 33 in FIG. 6 is an attachment surface 33a. The apparatus main body 33 is provided with a single light projecting optical system 4 and light receiving optics 9 in a downward orientation, and a detection area is set at a position below the mounting position. Both optical systems 4 and 8 are composed of four-divided lenses. As shown in FIG. 7, three each of them are arranged in a line above the light projecting optical system 4 in the apparatus main body 33 (inside). The first to sixth row light projecting elements 3A to 3F are mounted so as to be opposed to the light projecting optical system 4 in a six-row arrangement. The first to sixth row light receiving elements 8A to 8F arranged in the same manner are mounted facing the light projecting optical system 4 in a six-row arrangement. Therefore, in this object detection device 110, the detection areas in which twelve are arranged in a row are set in six rows.

  Further, the same mode changeover switch 14 and light emitting display 21 as in the first embodiment are provided, and the detection area on / off switch 13 is divided into two switch groups 13A and 13B each having three switches arranged. Arranged. The object detection device 110 has an electrical configuration substantially the same as that of the block diagram of FIG. 1 with only one more row of light projecting elements 3A to 3F and light receiving elements 8A to 8F than the first embodiment. Yes. Therefore, this object detection device 110 can also operate in the same manner as described in the first embodiment, and obtain the same effect.

1 is a block diagram showing an electrical configuration of an active object detection device according to a first embodiment of the present invention. (A) The perspective view of an active type object detection apparatus same as the above, (b) is a perspective view of the active type object detection apparatus in the state which removed the cover and the window. (A), (b) is the front view and bottom view of the state which removed the window and cover of the active type apparatus main body same as the above. (A) is explanatory drawing of the detection area seen from the sliding direction side of the automatic opening / closing door in the embodiment, (b) is a plan view showing the detection area. It is a flowchart which shows the control processing of the control part in an active type object detection apparatus same as the above. It is the perspective view seen from the lower part which shows the active type object detection apparatus which concerns on 2nd Embodiment of this invention. It is a bottom view of an object detection apparatus same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light projector 2 Light receiver 3A-3F Light projecting element 8A-8F Light receiving element 10b Priority notification means 14 Mode setting switch (mode setting means)
13 Detection area on / off switch (on / off setting means)
18 Automatic door (automatic door)
19 Detection Notification Means 21 Light-Emitting Display 100, 110 Active Object Detection Device A1 to A5 Detection Area

Claims (5)

An active object detection apparatus comprising a projector that sends detection waves for object detection toward a plurality of detection areas, and a light receiver that receives the detection waves reflected by the object and generates a light reception signal,
The detection area is arranged in a plurality of rows from a position close to a projector to a position far from the projector, and the light receiver has a plurality of different light receiving elements that receive light for each row of the detection area,
Furthermore, when the light receiving element corresponding to each row of the detection area outputs a light reception signal, an active type provided with a detection notification means for generating light of different colors or different sounds for each row of the detection area Object detection device.   2. The light or sound of a color corresponding to a row of the detection area closer to the projector when the plurality of light receiving elements corresponding to the plurality of rows of the detection area output light reception signals. An active-type object detection device comprising priority notification means for generating detection notification means.   3. The active object detection apparatus according to claim 1, further comprising mode switching means for switching between a normal detection mode in which the detection notification means is not operated and an area row setting mode in which the detection notification means is operated. .   4. The light projector according to claim 1, wherein the projector has a plurality of different light projecting elements that project light for each row of the detection area, and the light projecting device corresponding to each row of the detection area; An active type object detection device comprising an on / off setting means for switching between operation and non-operation for each light receiving element.   The active type object detection device according to claim 1, wherein the plurality of detection areas are set in the vicinity of an automatic door.

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