Detection device for automatic door

Abstract

[Problem] To provide a detection device for automatic doors which, when adjusting the monitoring angle of a sensor unit while being attached to the transom or the like, electrically detects the rotational angle (inclination angle) of the sensor unit so as to enable adjusting a monitoring area to the same position regardless of a worker therefor. [Solution] The detection device for automatic doors has a sensor unit 100, which is attached to the transom of an automatic door and which sets a floor surface in the vicinity of the automatic door as a monitoring area, and comprises a rotation angle detection means (for example, an acceleration sensor) that, while an axis along an attachment surface of the transom for said detection device is defined as an X-axis, an axis orthogonal to the attachment surface of the transom for said detection device is defined as a Y-axis, and an axis orthogonal to the X-axis and the Y-axis is defined as a Z-axis, detects a first rotation angle of the sensor unit centered about at least the X-axis.

Description

Automatic door detection device

[0001] The present invention relates to a detection device for an automatic door, and more specifically to a technique for electrically detecting the rotation angle (tilt angle) when a sensor unit is attached to a door frame or the like to adjust the monitoring angle.

[0002] Infrared detectors (sensors) for moving objects are used to detect moving objects and automatically open and close automatic doors, factory shutters, etc. (See, for example, Patent Document 1.) There are also detectors that use microwaves or a combination of microwaves and infrared rays.

[0003] The infrared detector 3 has an infrared light emitting section and an infrared light receiving section (both not shown), and is attached to the upper part of the automatic door 1 (hereinafter sometimes simply referred to as the "door") 2.

[0004] To detect moving objects (people, vehicles, etc.), the floor surface F near the door is used as the monitoring area MA, infrared rays are emitted from the infrared emitting unit, the reflected light is received by the infrared receiving unit, and the presence or absence of a moving object is determined based on whether or not there is a change in the received light level.

[0005] If a moving object is present within the monitoring area MA, a door open signal is output to the engine that opens and closes the door 1. Fig. 11(a) shows a state in which the detector 3 is provided on one side of the door 1, but normally the detector 3 is provided on both sides of the door (for example, on the outside and inside of the room).

[0006] In many cases, the position of the monitoring area MA monitored by the detector 3 is manually adjusted by the installer to the appropriate position by operating angle adjustment screws or knobs provided on the detector 3. The angle of the detector 3 is adjusted around the X-axis, Y-axis, and Z-axis, and in this specification, these axes are defined as follows:

[0007] 10, the axis along the mounting surface 2a on which the detector of the gate 2 is mounted is defined as the X-axis, the axis perpendicular to the detector mounting surface 2a of the gate 2 (perpendicular to the X-axis) is defined as the Y-axis, and the axis perpendicular to the X-axis and Y-axis is defined as the Z-axis. In a typical automatic door system, the X-axis and Y-axis are perpendicular to the direction of gravity, and the Z-axis is the direction of gravity.

[0008] 11(a) to (c) are side views of the door 1, and angle adjustment for the direction of entry (approaching the door 1) and departure (moving away from the door 1) of a person (moving object) relative to the door 1 is generally performed by rotating (tilting) the detector 3 around the X-axis.

[0009] Conventionally, the angle of the door 1 relative to the direction in which a person approaches or leaves is adjusted by an installer, for example, as shown in Fig. 12(a), while looking at a scale 3b for adjusting the angle engraved on the housing 3a of the detector 3, to achieve a predetermined angle. Note that, as shown in Fig. 12(b), instead of engraving, a sticker 3c showing the scale 3b for adjusting the angle may be affixed to the housing 3a of the detector 3.

[0010] Figure 11(b) shows the case where the monitoring area MA is adjusted in angle closer to the door 1 than in Figure 11(a), and Figure 11(c) shows the case where the monitoring area MA is adjusted in angle farther away from the door 1 than in Figure 11(a).

[0011] 13(a) to 13(c) are views of the door 1 as seen from the front (entrance direction). Normally, as shown in Fig. 13(a), the detectors 3 are installed so that the monitoring area MA is evenly spaced on both the left and right sides, but depending on the site, they may be intentionally angled.

[0012] Figure 13(b) shows the case where the angle of the monitoring area MA is adjusted so that it is shifted to the left of Figure 13(a), and Figure 13(c) shows the case where the angle of the monitoring area MA is adjusted so that it is shifted to the right of Figure 13(a).

[0013] 14, which shows the rear surface of the detector 3 (the surface in contact with the blind 2), to enable this angle adjustment in the left-right direction, for example, the center of the rear surface 3e of the housing of the detector 3 is rotatably attached to the blind 2 by a support shaft 3f. The support shaft 3f serves as the Y-axis, which becomes the center of rotation of the detector 3 in the left-right direction.

[0014] In addition, an arc-shaped slit 3g is formed around the support shaft 3f on the rear surface 3e of the housing of the detector 3. In this example, the slits 3g are formed in two locations, one on the left and one on the right of the support shaft 3f, and the allowable rotation angle around the support shaft 3f of the detector 3 is ±10°, with the horizontal state along the X-axis being 0°.

[0015] In this way, by making the entire detector 3 rotatable about the Y-axis (support shaft 3f), it is possible to adjust the angle in the left-right direction. To shift the monitoring area MA to the left of Fig. 13(a) as in Fig. 13(b), the detector 3 is rotated to the right (clockwise in Fig. 14, counterclockwise in Fig. 14) in Fig. 13(b), and to shift the monitoring area MA to the right of Fig. 13(a) as in Fig. 13(c), the detector 3 is rotated to the left (counterclockwise in Fig. 14), and once the position is determined, a setscrew (not shown) is inserted through the slit 3g to fix the detector 3.

[0016] After adjusting the angle, the actual monitoring area MA (detection range) is confirmed, and it is determined whether the monitoring area MA is appropriate. If the angle adjustment is insufficient, the same process is repeated by trial and error.

[0017] Since angle adjustment is done visually by the installer, differences occur depending on variations in workmanship, the installation environment at the actual site, etc. As a result, for example, if the monitoring area MA is moved too close to the door 1 as shown in Figure 11(b), the monitoring area MA will overlap and interfere with the door 1, causing a malfunction.

[0018] On the other hand, if the angle of the monitoring area MA is adjusted in a direction away from the door 1 as shown in FIG. 11(c), a dead zone will be created in the immediate vicinity of the door, which will cause a problem of impaired safety.

[0019] Furthermore, when shifting the monitoring area MA to the left, for example, as shown in Fig. 13(b), care must be taken to ensure that there are no influencing objects other than the detection target in the left area, that there are no problems with the blind area in the right area, etc. The same applies when shifting the monitoring area MA to the right, as shown in Fig. 13(c).

[0020] In any case, in order to optimize the position of the monitoring area, in many cases it is not possible to complete the adjustment in one go and it is necessary to redo it multiple times, which reduces work efficiency. Another problem is that since it is physically installed above the door, work at high altitudes is required using a stepladder or aerial work vehicle, which increases the risk of falling during work.

[0021] JP 2017-186904 A

[0022] Therefore, the object of the present invention is to provide a detection device for automatic doors that, when a sensor unit (detector) is attached to a blind or the like and the monitoring angle is adjusted, electrically detects the rotation angle (tilt angle) so that the monitoring area can be adjusted to the same position regardless of who is performing the operation.

[0023] In order to solve the above problems, the present invention provides a detection device for automatic doors that has a sensor unit that is attached to the doormat of an automatic door and monitors the floor surface near the automatic door, and is characterized by having a rotation angle detection means that detects at least a first rotation angle of the sensor unit around the X-axis, where the axis along the mounting surface of the doormat is the X-axis, the axis perpendicular to the mounting surface of the doormat is the Y-axis, and the axis perpendicular to the X-axis and Y-axis is the Z-axis.

[0024] In the present invention, the rotation angle detection means also detects a second rotation angle of the sensor unit about the Y axis.

[0025] The rotation angle detection means further detects the rotation angle of the sensor unit about the Z axis.

[0026] According to a preferred embodiment of the present invention, a three-axis acceleration sensor is used as the rotation angle detection means.

[0027] According to a preferred embodiment of the present invention, a communication module capable of communicating with a terminal device as an external device is provided, and the communication module transmits rotation angle information detected by the acceleration sensor to the terminal device, and the rotation angle information detected by the acceleration sensor is displayed on the terminal device.

[0028] The present invention also includes an embodiment comprising a support frame that supports the sensor unit rotatably around the X-axis, a base portion fixed to the mounting surface of the device, and a chassis arranged between the support frame and the base portion, wherein the chassis is supported on the base portion rotatably around the Z-axis and the support frame is supported on the chassis rotatably around the Y-axis.

[0029] The present invention also includes an embodiment in which the support frame is equipped with a motor that rotates the sensor unit around the X-axis, and the motor is driven by the terminal device, making it possible to remotely control the rotation of the sensor unit.

[0030] According to the present invention, when a sensor unit (detector) is attached to a blind or the like and the monitoring angle is adjusted, the rotation angle (tilt angle) is electrically detected, so that the monitoring area can be adjusted to the same position regardless of who is performing the work.

[0031]

[0023] FIG. 1 is a perspective view showing the internal structure of a detection device for automatic doors according to a first embodiment of the present invention;

[0024] FIG. 2 is a front view showing a cross section of the sensor unit portion of the detection device for automatic doors according to the first embodiment, viewed from directly below;

[0025] FIG. 3 is a schematic diagram showing an electrical block diagram and a terminal of the detection device for automatic doors according to the first embodiment;

[0026] FIG. 4 is a schematic diagram showing an electrical block diagram and another schematic diagram of the terminal of the detection device for automatic doors according to the first embodiment;

[0027] (a) to (c) are schematic diagrams for explaining three modes in which the sensor unit is rotated about the Z axis;

[0028] FIG. 5 is an exploded perspective view of a detection device for automatic doors according to a second embodiment of the present invention, in which the sensor unit is angle-adjustable (rotatable) about the Z axis;

[0029] (a) to (c) are perspective views showing three modes in which the sensor unit is rotated about the Z axis in the detection device for automatic doors according to the second embodiment;

[0029] FIG. 6 is a perspective view showing three modes in which the sensor unit is angle-adjusted about the Y axis in the detection device for automatic doors according to the second embodiment, with the Z axis rotation position at the center.

[0023] Fig. 1 is a perspective view showing three aspects of the detection device for automatic doors according to the second embodiment, in which the sensor unit is rotated clockwise around the Z axis and the angle is adjusted around the Y axis. Fig. 2 is a perspective view showing three aspects of the detection device for automatic doors according to the second embodiment, in which the sensor unit is rotated counterclockwise around the Z axis and the angle is adjusted around the Y axis. Fig. 3 is a schematic diagram explaining the definitions of the X axis, Y axis, and Z axis in this specification. (a) to (c) are schematic diagrams showing three aspects of the angle adjustment of the detector around the X axis in the direction of a person (moving object) entering or leaving the door, as viewed from the side. (a) is a side view showing an example of a detector that allows angle adjustment around the X axis, and (b) is a side view showing another example of the same detector. 1A is a schematic diagram showing a state in which the angle of the detector is adjusted around the Y axis, and the left and right monitoring areas are equalized; 1B is a schematic diagram showing a state in which the monitoring area is shifted to the left; and 1C is a schematic diagram showing a state in which the monitoring area is shifted to the left. 1D is a rear view of the detector, showing a configuration in which the angle of the detector can be adjusted around the Y axis.

[0032] Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 9, but the present invention is not limited to this.

[0033] First, a detection device 10A for an automatic door according to a first embodiment of the present invention will be described with reference to Figures 1 and 2. The detection device 10A for an automatic door includes a sensor unit 100 and a motor unit 200 that drives the sensor unit 100.

[0034] The sensor unit 100 has a box-shaped housing 110 with an open side facing the monitoring area MA (see, for example, Figure 11) on the floor surface F, and inside it are stored an infrared unit 120, a radar unit 130, and a main board 140.

[0035] The infrared unit 120 includes an infrared emitter 121 that irradiates (emits) infrared rays toward the monitoring area MA on the floor surface, and an infrared receiver 122 that receives reflected light from the monitoring area MA. The radar unit 130 includes a transmitter 131 that transmits microwaves toward the monitoring area MA on the floor surface, and a receiver 132 that receives reflected waves from the monitoring area MA.

[0036] In this first embodiment, the device is provided with an infrared unit 120 and a radar unit 130, but it is sufficient to provide either one. Although not clearly shown for convenience of drawing, the open surface of the housing 110 is covered with a transparent cover that is capable of transmitting the infrared rays of the infrared unit 120 and the microwaves of the radar unit 130.

[0037] Referring also to Figure 3, the main board 140 is provided with a microcomputer 141 as a main control unit, a detection control unit 142 for the infrared unit 120 and radar unit 130, a Bluetooth communication module 143 for communicating with external devices such as terminal devices 20, such as tablet terminals and smartphones, and an LED board 144 having LEDs that display the operating status of the sensor unit 100.

[0038] In this first embodiment, the sensor unit 100 is rotatably supported by a support frame (mount) 150, and the main board 140 is provided with a rotation angle detection means for detecting the rotation angle (tilt angle) of the sensor unit 100. In this first embodiment, a three-axis (X, Y, Z) acceleration sensor 145 is used as the rotation angle detection means. The acceleration sensor 145 may also be a two-axis (X, Y) type.

[0039] 2, the support frame 150 includes a base plate 151 and a pair of left and right leg plates 152L, 152R erected on both ends of the base plate 151. Rotation shafts 113L and 113R, which serve as centers of rotation, are coaxially provided between the left leg plate 152L and the opposing left side plate 111L of the housing 110, and between the right leg plate 152R and the opposing right side plate 111R of the housing 110, respectively.

[0040] The sensor unit 100 is attached to the transom 2 of the automatic door 1 via a support frame 150. Figure 2 is a front view showing the sensor unit 100 attached to the transom 2 as seen from directly below, and in this first embodiment, the approximate center of the base plate 151 is attached to the mounting surface 2a of the transom 2 with a bolt 153a.

[0041] Since the bolt 153a is perpendicular to the mounting surface 2a of the blind 2, it becomes the center of rotation of the Y axis of the sensor unit 100 when the monitoring area MA is shifted (moved) left or right, as explained above in Figures 13(a) to (c).

[0042] By loosening nut 153b, the sensor unit 100 can be rotated around the Y-axis (bolt 153a) via the support frame 150, and by tightening nut 153b, the sensor unit 100 can be fixed at a predetermined angular position around the Y-axis.

[0043] The motor unit 200 preferably includes a motor 210 that is a stepping (pulse) motor. In this first embodiment, a support base (frame) 220 for the motor 210 is screwed to the right leg plate 152R of the support frame 150 in FIG. 2, and the motor 210 is installed on the support base 220 with its drive shaft (motor shaft) 211 connected to the rotation shaft 113R.

[0044] According to this first embodiment, the sensor unit 100 can be rotated by a predetermined angle around the rotation axes 113L and 113R by the motor 210, and FIG. 4 shows an electrical block diagram when the motor 210 is provided.

[0045] The present invention does not necessarily require motor 210, and also includes an embodiment in which sensor unit 100 is rotated manually without using motor 210. In that case, for example, a knob or knob-like operating portion for rotating sensor unit 100 is provided on one of rotation shafts 113L, 113R, preferably together with angle fixing means such as a fixing screw.

[0046] As explained in Figure 2, the sensor unit 100 is attached to the interlock 2 of the automatic door 1 via the support frame 150. As shown in Figures 11(a) to (c), we will explain the case where the angle of the sensor unit 100 is adjusted around the X axis (the axis along the mounting surface 2a of the interlock 2 device 10A) in the direction of entry and departure of a person (moving object) from the door 1.

[0047] After attaching the support frame 150 to the lintel 2 with the bolt 153a, the support frame 150 is rotated around the bolt 153a (Y-axis) to a position where the rotation axes 113L and 113R are horizontal, i.e., parallel to the X-axis, and then the nut 153b is tightened to secure the frame in place.

[0048] In this state, when the sensor unit 100 is rotated around the X axis to adjust the monitoring area MA in a direction toward or away from the door 1, the acceleration sensor 145 detects the rotation angle (tilt angle).

[0049] The rotation angle (tilt angle) detected by this acceleration sensor 145 is input into the microcomputer 141 and transmitted as angle information of the sensor unit 100 from the communication module 143 to the installer's terminal device 20 .

[0050] A corresponding dedicated application is pre-installed in the terminal device 20, and the angle information of the sensor unit 100 is displayed as a numerical value, for example, 0°, +10°, etc., on the display screen of the terminal device 20. This allows the installer to accurately adjust the angle of the sensor unit 100 while checking the specific numerical value of the angle information.

[0051] Furthermore, if the motor unit 200 is provided, the desired adjustment angle is set in the terminal device 20 as, for example, "set angle, +10°" and transmitted to the sensor unit 100. As a result, the microcomputer 141 controls the motor 210 while checking the angle information (rotation angle) from the acceleration sensor 145 so that the angle of the sensor unit 100 becomes the predetermined angle set in the terminal device 20, and automatically adjusts the angle of the sensor unit 100 to the set angle (+10° in this case).

[0052] This allows the installer to adjust the angle of the sensor unit 100 remotely without touching the sensor unit 100 installed at a high place such as a blind, thereby reducing the risk of accidents such as falling.

[0053] 13(a) to 13(c), even when the sensor unit 100 is rotated around the bolt 153a as the Y-axis to move the monitoring area MA left and right, the acceleration sensor 145 detects the rotation angle of the sensor unit 100 and the angle information is displayed on the display screen of the terminal device 20, allowing the installer to accurately adjust the angle of the sensor unit 100 around the Y-axis while checking the specific numerical value of the angle information. In this embodiment, the angle adjustment of the sensor unit 100 around the Y-axis is performed manually.

[0054] Next, referring to Figures 5a and 5b, we will explain a detection device 10B for automatic doors according to a second embodiment in which the sensor unit 100 is rotated around the Z axis (an axis perpendicular to the X and Y axes).

[0055] Figure 5a is a plan view of the sensor unit 100 attached to the interlock 2. Normally, as shown in Figure 5a, the sensor unit 100 is attached to the interlock 2 so that the axis of rotation passing through its rotation axes 113L and 113R (see Figure 2) is parallel to the X-axis.

[0056] At this time, the rotation angle of the sensor unit 100 about the Z axis is set to 0°. Although not shown, for convenience of explanation, the monitoring area MA is assumed to be rectangular in plan view, and the monitoring area MA is set to a normal state parallel to the door 1.

[0057] In contrast, Figure 5a(b) shows a state in which the sensor unit 100 is rotated (tilted) a predetermined angle to the left (counterclockwise) about the Z axis from the 0° state in Figure 5a(a). In this case, the monitoring area MA also tilts to the left (counterclockwise) from the normal state in Figure 5a(a).

[0058] 5a(c) shows a state in which the sensor unit 100 is rotated (tilted) a predetermined angle to the right (clockwise) about the Z axis from the 0° state in FIG. 5a(a). In this case, the monitoring area MA also tilts to the right (clockwise) from the normal state in FIG. 5a(a).

[0059] Next, the configuration of a detection device 10B for an automatic door according to a second embodiment will be described with reference to the exploded perspective view of Figure 5b. In this second embodiment, the sensor unit 100 is rotatably supported by the support frame 150 and is equipped with the motor unit 200, as described in the first embodiment, although the motor unit 200 may be omitted.

[0060] According to this second embodiment, a base portion 160 and a chassis 170 are further used to enable the sensor unit 100 to rotate around the Z axis.

[0061] The base portion 160 is approximately U-shaped and includes a base plate 161 that is screwed to the mounting surface 2a of the transom 2, an upper flange plate 162U that stands upright at approximately a right angle from the upper end (upper edge) of the base plate 161, and a lower flange plate 162L that stands upright at approximately a right angle from the lower end (lower edge) of the base plate 161 in the same direction as the upper flange plate 162U.

[0062] Bearing holes 163U and 163L are drilled coaxially in the upper flange plate 162U and the lower flange plate 162L. The substrate 161 of the base portion 160 is screwed to the mounting surface 2a of the interlock 2 so that the bearing holes 163U and 163L face in the Z-axis direction (up and down direction). The base portion 160 may be made of either metal or synthetic resin, but the upper flange plate 162U and the lower flange plate 162L have flexibility that allows the gap between them to be widened.

[0063] The chassis 170 is shaped to fit within the base portion 160 and comprises a sensor mounting board 171 to which the support frame 150 of the sensor unit 100 is rotatably attached, an upper plate 172U bent at approximately a right angle from the upper end (upper edge) of the sensor mounting board 171 to face the upper flange plate 162U of the base portion 160, and a lower plate 172L bent at approximately a right angle from the lower end (lower edge) of the sensor mounting board 171 to face the lower flange plate 162L of the base portion 160.

[0064] The upper plate 172U and the lower plate 172L are formed with cylindrical boss shafts 173U and 173L that rotatably fit into the bearing holes 163U and 163L. The chassis 170 is supported on the base portion 160 so as to be rotatable about the Z axis by fitting the boss shafts 173U and 173L into the bearing holes 163U and 163L while the upper flange plate 162U and the lower flange plate 162L of the base portion 160 are spread apart. The lower flange plate 162L is provided with a fixing screw 164 that fixes the chassis 170 in a predetermined rotational position.

[0065] A bolt through-hole 174 is drilled in the sensor mounting board 171 of the chassis 170, through which a bolt 153a (see FIG. 2) serving as the rotation center of the Y axis of the sensor unit 100 is inserted, and the sensor unit 100 is mounted to the sensor mounting board 171 via the support frame 150 so as to be rotatable about the bolt 153a (Y axis). The sensor mounting board 171 also has a screw hole 175 for fixing the sensor unit 100 at a predetermined angular position.

[0066] This allows the sensor unit 100 to rotate around the X-axis (rotation axes 113L, 113R), the Y-axis (bolt 153a), and the Z-axis (bearing holes 163U, 163L). These rotation angles (tilt angles) are detected by the acceleration sensor 145 and transmitted from the communication module 143 to the terminal device 20 as angle information of the sensor unit 100.

[0067] Figure 6 shows three modes for adjusting the angle of the sensor unit 100 around the Z axis. Figure 6(a) corresponds to Figure 5(a) above, and shows a state in which the sensor unit 100 is not tilted around the Z axis, and the rotation angle (tilt angle) of the sensor unit 100 around the Z axis is 0°.

[0068] Figure 6(b) corresponds to the previous Figure 5(b) and shows the sensor unit 100 tilted a predetermined angle to the right (left (counterclockwise) in the plan view of Figure 5(b)) from the 0° position around the Z axis.

[0069] Also, Figure 6(c) corresponds to the previous Figure 5(c) and shows the sensor unit 100 tilted at a predetermined angle around the Z axis, either at 0° or to the left (to the right (clockwise) in the plan view of Figure 5(c)).

[0070] Figure 7 shows three modes in which the sensor unit 100 is rotated (tilted) around the Y axis from the state shown in Figure 6 (a) where the rotation angle (tilt angle) of the sensor unit 100 around the Z axis is 0°.

[0071] Figure 7(a) shows the case where the sensor unit 100 is rotated left around the Y axis, Figure 7(b) shows the case where the sensor unit 100 is in the central position without being rotated around the Y axis, and Figure 7(c) shows the case where the sensor unit 100 is rotated right around the Y axis.

[0072] FIG. 8 shows three modes in which the sensor unit 100 is rotated (tilted) around the Y axis in the state of FIG. 6B in which the sensor unit 100 is rotated clockwise around the Z axis.

[0073] Figure 8(a) shows the case where the sensor unit 100 is rotated left around the Y axis, Figure 8(b) shows the case where the sensor unit 100 is in the central position without being rotated around the Y axis, and Figure 8(c) shows the case where the sensor unit 100 is rotated right around the Y axis.

[0074] 9A to 9C show three modes in which the sensor unit 100 is rotated (tilted) around the Y axis in the state of FIG. 6C in which the sensor unit 100 is rotated leftward around the Z axis.

[0075] Figure 9(a) shows the case where the sensor unit 100 is rotated left around the Y axis, Figure 9(b) shows the case where the sensor unit 100 is in the central position without being rotated around the Y axis, and Figure 9(c) shows the case where the sensor unit 100 is rotated right around the Y axis.

[0076] According to the present invention, the rotation angle (tilt angle) of the sensor unit 100 is detected by the acceleration sensor 145 and transmitted as angle information of the sensor unit 100 from the communication module 143 to the terminal device 20 .

[0077] Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the description of the above embodiments. Modifications or improvements made to the above embodiments by those skilled in the art are also included in the technical scope of the present invention.

[0078] DESCRIPTION OF SYMBOLS 1 Automatic door 2 Gate 2a Mounting surface 10A, 10B Detection device for automatic door 100 Sensor unit 110 Housing 113L, 113R Rotation axis (X axis) 120 Infrared unit 130 Radar unit 140 Main board 141 Microcomputer 142 Detection control unit for infrared unit and radar unit 143 Communication module 145 Acceleration sensor 150 Support frame 153a Mounting bolt of support frame (Y axis) 160 Base part 163U, 163L Bearing hole (Z axis) 170 Chassis 173U, 172L Boss (rotation axis) 20 Terminal device 200 Motor unit 210 Motor F Floor surface MA Monitoring area

Claims

1. A detection device for automatic doors having a sensor unit that is attached to the door frame of an automatic door and monitors the floor surface near the automatic door, the detection device for automatic doors comprising a rotation angle detection means for detecting a first rotation angle of the sensor unit around at least the X-axis, with the axis along the mounting surface of the device for the door frame being the X-axis, the axis perpendicular to the mounting surface of the device for the door frame being the Y-axis, and the axis perpendicular to the X-axis and Y-axis being the Z-axis.

2. A detection device for an automatic door as set forth in claim 1, wherein said rotation angle detection means also detects a second rotation angle of said sensor unit about said Y-axis.

3. A detection device for an automatic door as set forth in claim 2, wherein said rotation angle detection means further detects a rotation angle of said sensor unit about said Z-axis.

4. A detection device for an automatic door according to any one of claims 1 to 3, characterized in that a three-axis acceleration sensor is used as the rotation angle detection means.

5. A detection device for automatic doors as described in claim 4, further comprising a communication module capable of communicating with a terminal device as an external device, said communication module transmitting rotation angle information detected by said acceleration sensor to said terminal device, and said terminal device displaying the rotation angle information detected by said acceleration sensor.

6. A detection device for automatic doors as described in claim 5, comprising a support frame which supports the sensor unit rotatably around the X-axis, a base portion which is fixed to the mounting surface of the device, and a chassis which is disposed between the support frame and the base portion, wherein the chassis is supported on the base portion so as to be rotatable around the Z-axis, and the support frame is supported on the chassis so as to be rotatable around the Y-axis.

7. The detection device for automatic doors as described in claim 6, characterized in that the support frame is equipped with a motor that rotates the sensor unit around the X-axis, and the rotation of the sensor unit can be remotely controlled by driving the motor from the terminal device.

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