Detection device for automatic door

Abstract

To provide a detection device for an automatic door capable of adjusting a monitoring area to the same position no matter who works by electrically detecting a rotation angle (inclination angle) when adjusting a monitoring angle by attaching a sensor unit to a transom or the like.SOLUTION: A detection device for an automatic door includes a sensor unit 100 attached to a transom of the automatic door so as to monitor a floor surface in the vicinity of the automatic door as a monitoring area, in which there is provided rotation angle detection means (for example, an acceleration sensor) for detecting a first rotation angle of the sensor unit with at least an X axis as a center, where the X axis is along the mounting surface of the device of the transom, a Y axis is an axis orthogonal to the mounting surface of the device of the a transom, and a Z axis is orthogonal to the X axis and the Y axis.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a detection device for automatic doors, 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 and the monitoring angle is adjusted. [Background technology]

[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] Here, we will explain the infrared detector. First, referring to Fig. 11(a), the infrared detector 3 has an infrared emitting unit and an infrared receiving unit (both not shown), and is attached to a door stopper 2, which is the upper part of an automatic door (hereinafter sometimes simply called "door") 1.

[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] When 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, 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 an installer to an appropriate position by operating angle adjustment screws or knobs provided on the detector 3. The angle adjustment of the detector 3 is performed around the X-axis, Y-axis, and Z-axis, and in this specification, each of these axes is defined as follows.

[0007] 10, the axis along the mounting surface 2a on which the detector of the interlocking door 2 is mounted is defined as the X-axis, the axis perpendicular to the detector mounting surface 2a of the interlocking door 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] Figures 11(a) to (c) are side views of door 1. The angle adjustment for the entry direction (approaching door 1) and departure direction (moving away from door 1) of a person (moving object) relative to door 1 is generally performed by rotating (tilting) detector 3 around the X-axis.

[0009] Conventionally, the angle adjustment for the direction in which a person approaches or leaves the door 1 is done by an installer adjusting the angle to a specified angle while looking at a scale 3b for adjusting the angle engraved on the housing 3a of the detector 3, as shown in Fig. 12(a), for example. Note that, as shown in Fig. 12(b), in some cases, instead of engraving, a sticker 3c showing the scale 3b for adjusting the angle is 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), while Figure 11(c) shows the case where the monitoring area MA is adjusted in angle away from the door 1 than in Figure 11(a).

[0011] 13(a) to (c) are views of the door 1 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 the left and right, but depending on the site, they may be intentionally angled.

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

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

[0014] In addition, an arc-shaped slit 3g centered on the support shaft 3f is formed on the housing back surface 3e 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 of the detector 3 about the support shaft 3f 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 axis 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 in Fig. 13(b) (clockwise, counterclockwise in Fig. 14), 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 in Fig. 13(c) (counterclockwise, clockwise 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 location of 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 the angle adjustment is done by the installer's visual inspection, there will be differences depending on the work variance and the installation environment of 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 with the door 1 and interfere with it, causing a malfunction.

[0018] On the other hand, as shown in FIG. 11(c), if the angle of the monitoring area MA is adjusted in a direction away from the door 1, a dead zone will be created immediately adjacent to the door, causing a problem of compromised 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 monitoring area, in many cases, adjustments cannot be completed in one go and the work must be redone many times, resulting in poor work efficiency. Another problem is that the device must be physically installed above the door, which requires high-altitude work using a stepladder or aerial vehicle, which poses the risk of falling during work. [Prior art documents] [Patent documents]

[0021] [Patent Document 1] JP 2017-186904 A Summary of the Invention [Problem to be solved by the invention]

[0022] Therefore, the objective 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, can electrically detect the rotation angle (tilt angle) and adjust the monitoring area to the same position regardless of who is performing the operation. [Means for solving the problem]

[0023] In order to solve the above problems, the present invention provides a detection device for an automatic door having a sensor unit that is attached to the blind of the automatic door and monitors the floor surface near the automatic door, The device is characterized in that it is equipped with a rotation angle detection means which detects at least a first rotation angle of the sensor unit around the X-axis, with the axis along the mounting surface of the device being the X-axis, the axis perpendicular to the mounting surface of the device being the Y-axis, and the axis perpendicular to the X-axis and Y-axis being 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 a 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] Furthermore, 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 a mounting surface of the device, and a chassis disposed 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 by 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 to enable remote control of the rotation of the sensor unit. Effect of the Invention

[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. [Brief description of the drawings]

[0031] [Figure 1] 1 is a perspective view showing an internal structure of a detection device for use with an automatic door according to a first embodiment of the present invention; [Diagram 2] FIG. 2 is a front view seen from directly below, showing a cross section of a sensor unit portion of the detection device for use with an automatic door according to the first embodiment. [Diagram 3] FIG. 2 is a schematic diagram showing an electrical block diagram and a terminal device of the detection device for use with an automatic door according to the first embodiment. [Figure 4] FIG. 2 is an electrical block diagram of the detection device for use with an automatic door according to the first embodiment, and a schematic diagram showing another aspect of the terminal device. [Figure 5a] 5(a) to (c) are schematic diagrams illustrating three modes in which the sensor unit is rotated around the Z axis. [Figure 5b] FIG. 11 is an exploded perspective view showing a detection device for use with an automatic door according to a second embodiment of the present invention, in which the sensor unit is angle adjustable (rotatable) around the Z axis. [Figure 6] 13(a) to 13(c) are perspective views showing three states in which the sensor unit is rotated around the Z axis in the detection device for an automatic door according to the second embodiment. [Figure 7] 13 is a perspective view showing three states of the sensor unit in the detection device for an automatic door according to the second embodiment, when the sensor unit is rotated around the Z axis and set at the central position, and the angle is adjusted around the Y axis. FIG. [Figure 8] 13A to 13C are perspective views showing three states of the sensor unit in the detection device for an automatic door according to the second embodiment, when the sensor unit is rotated clockwise around the Z axis and the angle is adjusted around the Y axis. [Figure 9]13A to 13C are perspective views showing three states of the sensor unit in the detection device for an automatic door according to the second embodiment, when the sensor unit is rotated left about the Z axis and the angle is adjusted about the Y axis. [Figure 10] FIG. 2 is a schematic diagram for explaining the definitions of the X-axis, Y-axis, and Z-axis in this specification. [Figure 11] 6(a) to 6(c) are schematic diagrams showing three ways in which the angle of the detector is adjusted around the X-axis in the direction of entry and departure of a person (moving object) relative to the door, as viewed from the side. [Figure 12] FIG. 2A is a side view showing an example of a detector that allows angle adjustment around the X-axis, and FIG. 2B is a side view showing another example of the same detector. [Figure 13] In this diagram, the angle of the detector is adjusted around the Y axis as viewed from the front of the door, and (a) a schematic diagram shows the state in which the monitoring area is equal on both the left and right sides, (b) a schematic diagram showing the state in which the monitoring area has been shifted to the left, and (c) a schematic diagram showing the state in which the monitoring area has been shifted to the left. [Figure 14] FIG. 13 is a rear view of the detector, showing a configuration in which the angle of the detector can be adjusted around the Y axis. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

[0033] First, a detection device for automatic doors 10A according to a first embodiment of the present invention will be described with reference to Figures 1 and 2. This detection device for automatic doors 10A 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 a monitoring area MA (e.g., see FIG. 11) on the floor surface F, and houses an infrared unit 120, a radar unit 130, and a main board 140 inside.

[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 equipped with an infrared unit 120 and a radar unit 130, but it is sufficient to have either one of them. Although not clearly shown for convenience of drawing, the open surface of the housing 110 is covered with a transparent cover that allows the infrared rays of the infrared unit 120 and the microwaves of the radar unit 130 to pass through.

[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 the radar unit 130, a communication module 143, for example a Bluetooth communication module, which communicates with a terminal device 20 such as an external device such as a tablet terminal or a smartphone, and an LED board 144 having LEDs which 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 (base) 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 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 on one side and the opposing left side plate 111L of the housing 110, and between the right leg plate 152R on the other side 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. Fig. 2 is a front view showing the sensor unit 100 attached to the transom 2 as viewed from directly below, and in this first embodiment, approximately the center portion of the base plate 151 is attached to the mounting surface 2a of the transom 2 by a bolt 153a.

[0041] Since the bolt 153a is perpendicular to the mounting surface 2a of the interlocking member 2, it serves as 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 previously described 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 includes a motor 210, which is preferably 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 rotating 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] It should be noted that the present invention does not necessarily require motor 210, and the present invention 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 part for rotating sensor unit 100 is provided on one of rotation shafts 113L, 113R, preferably together with an angle fixing means such as a fixing screw.

[0046] As explained in Figure 2, the sensor unit 100 is attached to the interlocking frame 2 of the automatic door 1 via the support frame 150, but as shown in Figures 11(a) to (c), a case will be described in which the angle of the sensor unit 100 is adjusted around the X-axis (the axis along the mounting surface 2a of the interlocking device 10A of the interlocking frame 2) in the direction in which a person (moving object) enters or leaves the door 1.

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

[0048] In this state, when the sensor unit 100 is rotated about 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 to 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 on the display screen of the terminal device 20 as a numerical value, for example, 0°, +10°, etc. 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 included, 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 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 remotely adjust the angle of the sensor unit 100 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)-(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 rotation angle of the sensor unit 100 is detected by the acceleration sensor 145 and the angle information is displayed on the display screen of the terminal device 20, so that the installer can 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, a detection device 10B for use with an automatic door according to a second embodiment in which the sensor unit 100 is rotated about the Z axis (an axis perpendicular to the X and Y axes) will be described with reference to Figs. 5a and 5b.

[0055] Figure 5a is a plan view of the sensor unit 100 attached to the parasitic sensor 2. Typically, as shown in Figure 5(a), the sensor unit 100 is attached to the parasitic sensor 2 so that the axis of rotation passing through its rotation axes 113L, 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 a plan view, and the monitoring area MA is set to a normal state parallel to the door 1.

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

[0058] Also, Fig. 5a(c) shows a state in which the sensor unit 100 is rotated (tilted) a predetermined angle to the right (clockwise) from the 0° state in Fig. 5a(a) about the Z axis. 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 for automatic doors 10B according to a second embodiment will be described with reference to the exploded perspective view of Fig. 5b. In this second embodiment, the sensor unit 100 is rotatably supported by the support frame 150 and is used 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 about the Z-axis.

[0061] The base portion 160 is approximately U-shaped and includes a base plate 161 which is screwed to the mounting surface 2a of the interposer 2, an upper flange plate 162U which stands upright at approximately a right angle from the upper end (upper side) of the base plate 161, and a lower flange plate 162L which stands upright at approximately a right angle from the lower end (lower side) 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 interposer 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 be fitted into 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 side) of the sensor mounting board 171 so as 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 side) of the sensor mounting board 171 so as 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 which rotatably fit into the bearing holes 163U and 163L. The chassis 170 is supported by 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 in a state where 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 which fixes the chassis 170 in a predetermined rotational position.

[0065] A bolt through hole 174 is formed 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 attached 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 is also provided with 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] Fig. 6 shows three modes for adjusting the angle of the sensor unit 100 around the Z axis. Fig. 6(a) corresponds to Fig. 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 Figure 5a(b) above, and shows the sensor unit 100 tilted a certain angle to the right (left (counterclockwise) when viewed in plan in Figure 5a(b)) from the 0° position around the Z axis.

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

[0070] FIG. 7 shows three modes in which the sensor unit 100 is rotated (tilted) around the Y axis from the state shown in FIG. 6(a) in which 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) about the Y axis from the state of FIG. 6(b) in which the sensor unit 100 is rotated rightward about 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] FIG. 9 shows three modes in which the sensor unit 100 is rotated (tilted) around the Y axis in the state of FIG. 6(c) in which the sensor unit 100 is rotated left 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, any of such rotation angles (tilt angles) of the sensor unit 100 are 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. [Explanation of symbols]

[0078] 1 Automatic doors 2. No Eyes 2a Mounting surface 10A, 10B Automatic door detection device 100 Sensor Unit 110 Cabinet 113L, 113R Rotation axis (X axis) 120 Infrared Unit 130 Radar Unit 140 Main Board 141 Microcomputer 142 Detection control unit of infrared unit or radar unit 143 Communication Module 145 Accelerometer 150 Support Frame 153a Support frame mounting bolt (Y axis) 160 Base 163U,163L Bearing hole (Z axis) 170 Chassis 173U, 172L Boss (rotating axis) 20 Terminal 200 Motor Unit 210 Motor F Floor MA Surveillance Area

Claims

1. An automatic door detection device having a sensor unit attached to the blind of an automatic door and monitoring the floor surface near the automatic door, The automatic door detection device is characterized in that it is equipped with a rotation angle detection means for detecting a first rotation angle of the sensor unit around at least the X-axis, where the axis along the mounting surface of the device is defined as the X-axis, the axis perpendicular to the mounting surface of the device is defined as the Y-axis, and the axis perpendicular to the X-axis and the Y-axis is defined as the Z-axis.

2. 2. The detection device for an automatic door according to claim 1, wherein the rotation angle detection means also detects a second rotation angle of the sensor unit about the Y-axis.

3. 3. The detection device for an automatic door according to claim 2, wherein said rotation angle detection means further detects a rotation angle of said sensor unit about said Z axis.

4. 4. The detection device for an automatic door according to claim 1, wherein a three-axis acceleration sensor is used as the rotation angle detection means.

5. The automatic door detection device according to claim 4, further comprising a communication module capable of communicating with a terminal device as an external device, wherein 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.

6. The detection device for automatic doors as described in claim 5, further comprising a support frame which supports the sensor unit rotatably around the X-axis, a base portion which is fixed to a 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.

Images