JP3600347B2 - Human body detection device and alarm device using the same - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a human body detection device and an alarm device using the same.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in stores and the like, an alarm device that automatically detects a visitor or the like has been widely used. The pyroelectric sensor used in this type of alarm device is generally a pyroelectric sensor that detects weak infrared rays emitted by the human body, and is used in combination with an infrared focusing lens and has directivity. For this reason, after mounting the pyroelectric sensor at a predetermined position of a building material such as a ceiling, the sensitivity is confirmed by a test, and the mounting position and direction are adjusted.
[0003]
In this case, the internal structure of the building, the layout of entrances and exits, the layout of display shelves, the direction of air conditioner outlets that cause malfunctions, the position of windows where sunlight enters, the state of illumination light, the direction of visitors Due to such reasons, re-construction may be required to change the mounting position of the alarm device.
[0004]
If the orientation of the pyroelectric sensor can be changed over a wide range, it may not be necessary to change the mounting position again, and therefore, a product that meets this demand has been devised. This is a structure in which a support holding a pyroelectric sensor is rotatably connected to a base attached to a building material such as a ceiling.
[0005]
[Problems to be solved by the invention]
2. Description of the Related Art Conventionally, in a human body detection device used for an alarm device, a response range of a pyroelectric sensor itself is constant and cannot be adjusted. Accordingly, in order to expand or narrow the detection range, not only the direction and position of the human body detection device but also the distance of the human body detection device to the object to be detected must be adjusted, and the mounting position is changed each time. It takes a lot of time for construction.
[0006]
Therefore, an object of the present invention is to provide a human body detection device capable of expanding or reducing the detection range of a pyroelectric sensor without adjusting the distance to an object to be detected, and an alarm device using the same.
[0007]
[Means for Solving the Problems]
Human body detection device according to claim 1, wherein the pyroelectric sensor and; disposed on the front surface of the pyroelectric sensor, as well as arranged ommatidia in the center, a plurality of single-eye around the central ommatidium An infrared condensing lens having a compound eye lens structure in which are arranged in an annular shape ; a sensor body having a window facing the front surface of the infrared condensing lens and supporting a pyroelectric sensor and an infrared condensing lens therein; A small hole that is detachably attached to the window of the sensor body and is provided to face the central unit of the infrared condensing lens, and a plurality of annular holes are provided around the central unit of the infrared condensing lens. A lens cover having a light-shielding portion provided so as to face the single eye, and having the infrared condensing lens lose its function as a compound eye lens and function as a monocular lens when attached to a window of the sensor main body. I have it. Therefore, by selecting the attachment / detachment state of the lens cover, the light distribution pattern of the infrared condenser lens is changed. Thus, the size of the detection range of the pyroelectric sensor changes without changing the distance to the detection target.
[0009]
According to a second aspect of the invention, there is provided a human body detecting device according to claim 1, wherein the lens cover attenuates the response wavelength range of the pyroelectric sensor, and resiliently formed by material flex, the sensor body Has a fitting portion that is elastically deformably fitted to the inner peripheral edge of the window. Therefore, the sensor cover is elastically fitted to the window of the sensor body.
[0010]
Alarm apparatus according to the third aspect, the human body detecting device according to claim 1 or 2, wherein; a receiver for issuing an alarm by receiving a detection signal from the human body detecting device; and a support member for supporting the human body detecting device ; Therefore, by selecting the attachment / detachment state of the lens cover, the light distribution pattern of the infrared condenser lens is changed.
Thus, the size of the detection range of the pyroelectric sensor changes without changing the distance to the detection target.
[0011]
The invention according to claim 4 is the alarm device according to claim 3 , wherein the support has a rotation shaft that is rotatable on an axis perpendicular to the mounting surface for the building material and that can be fixed at an arbitrary position. A human body detection device is supported on the rotation shaft. Therefore, when the rotation shaft is rotated, the direction of the pyroelectric sensor is adjusted around the rotation center of the rotation shaft.
[0012]
According to a fifth aspect of the present invention, there is provided the alarm device according to the fourth aspect , wherein the human body detecting device is supported by the rotating shaft so as to be freely rotatable and freely fixed at an arbitrary position in a plane parallel to the axis thereof. Therefore, the direction of the human body detection device can be changed not only in the direction around the axis of the rotation axis but also in a direction parallel to the axis of the rotation axis.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal side view showing a configuration of a main part of the alarm device A, FIG. 2 (a) is a plan view showing an inner surface of a cover of a rotating support, and FIG. 2 (b) is a plan view showing an inner surface of a base. FIG. 3 is a longitudinal sectional side view showing a part of the structure of a stator electrode portion, FIG. 4 shows a sensor main body, (a) is a front view with a lens cover removed, and (b) is a view showing the lens cover. FIG. 5 is a side view showing a reduced mounting relationship between the base and the rotating support, and FIG. 6 is a front view showing a reduced mounting relationship between the base and the rotating support.
[0014]
In FIG. 1, reference numeral 1 denotes a construction material to which the base 2 of the alarm device A is attached. In the present embodiment, the construction material will be described as a ceiling. A rotation support 3 which is a support for supporting a human body detection device described later includes a cover 4 which is removably connected to the base 2 and a hollow rotating support rotatably supported on the cover 4 with a vertical axis. It is formed by a shaft 5 and a sensor body 6 rotatably connected to the tip of the rotating shaft 5. The sensor body 6 has a sensor cover 8 that can be attached and detached by elastically bending the two locking claws 7. The sensor main body 6 has a spring bearing 9, and the spring body 9 is turned around the shaft 10 by fitting the spring bearing 9 to a shaft 10 erected from the rotating shaft 5. Further, an opening 11 into which the rotating shaft 5 is inserted is formed in the sensor body 6. The opening width of the opening 11 is determined so that an opening edge thereof comes into contact with the rotation shaft 5 to define a rotation range around the shaft 10.
[0015]
A detection unit 13 is attached to a support plate 12 fixedly provided on the sensor body 6. The detection unit 13 includes a pyroelectric sensor 14, a cup-shaped infrared light condensing lens 16 held by a lens holder 15 to cover the periphery and front of the pyroelectric sensor 14, and the pyroelectric sensor 14 detects a visitor. An LED 17 for displaying the state when the operation is performed, and a lens cover 18 for selectively covering the front surface of the infrared condenser lens 16.
[0016]
The pyroelectric sensor 14 is a sensor that detects weak infrared rays (wavelength of about 7 to 20 μm) emitted from a human body. As shown in FIG. 4 (a), the infrared condensing lens 16 has a compound eye lens configuration including a single eye (omatidium) 16a arranged in the center and a plurality of single eyes 16b arranged around the single eye. It is. The sensor cover 8 is formed with a circular window 8a opposite to the tip of the infrared condensing lens 16 for detachably fitting the lens cover 18, and a display hole 8b through which light from the LED 17 passes.
[0017]
The lens cover 18 is formed of a material that attenuates the response wavelength range (about 7 to 20 μm) of the pyroelectric sensor 14, for example, an elastic synthetic resin such as styrene or polycarbonate. As shown in (b), a small hole 18a facing the single eye 16a at the center of the infrared condensing lens 16 and a light shielding portion 18b for shielding the front surface of the other annular eye 16b are formed. As shown in FIG. 1, a cylindrical fitting portion 18c is formed on the inner peripheral edge of the window 8a of the sensor body 6 so as to be elastically deformable. That is, although the infrared condensing lens 16 has a compound eye lens configuration, it can be changed to a monocular lens by covering it with the lens cover 18. The detection unit 13 and the sensor body 6 constitute a human body detection device 19.
[0018]
The connection lines 20a and 20b connected to the detection unit 13 for each pole are inserted into the rotary shaft 5, and the tip is connected to the rotor electrode section 22 formed on the substrate 21 for each pole. Further, a stator electrode portion 23 which is always connected to the rotor electrode portion 22 is provided on the base 2. The tip of the rotary shaft 5 has an outer peripheral shape that is not a perfect circle, such as an elliptical shape, and is fitted to the tip in a state where the substrate 21 is prevented from rotating. The board 21 is fixed to the rotating shaft 5 by fitting a washer (not shown) to the end of the shaft and screwing a nut 21a.
[0019]
As shown in FIG. 2A, the rotor electrode portions 22 are arranged on a concentric circle whose center is the radius of rotation of the rotary support 3 (the center of the rotary shaft 5), and each is connected to the connection line 20a. , 20b and two ring-shaped contacts 24, 25 connected to the pyroelectric sensor 14. As shown in FIGS. 2B and 3, the stator electrode 23 is held by a cylindrical boss 26 integrally formed on the inner surface of the base 2, and is always in contact with each of the ring-shaped contacts 24 and 25. One contact 27, 28, two terminal plates 31, 32 fixed by screws 30 to a terminal block 29 formed integrally with the base 2, and these terminal plates 31, 31 and the contacts 27, 28. And a coil spring 33 connecting between the two. Although only one of these contacts 27 and 28 is shown in FIG. 3, a copper alloy ball is used, and the contacts 27 and 28 are urged toward the rotor electrode portion 22 by the coil spring 33. Is prevented from jumping out of the cylindrical boss 26 by making the inside diameter small.
[0020]
That is, when the portion of the rotation shaft 5 and the sensor body 6 of the rotary support 3 is rotated, the rotor electrode portion 22 is also rotated integrally, so that the contacts 27 and 28 of the base 2 move on the ring-shaped contacts 24 and 25. Sliding relatively. Thus, the pyroelectric sensor 14 is configured to be connected to the connection lines 20a and 20b, the rotor electrode unit 22, and the stator electrode unit 23 on the base 2 side.
[0021]
As shown in FIG. 1, a knockout portion 2 a is formed on a part of the outer peripheral edge of the cover 2 on the side opposite to the mounting surface of the base 2 with respect to the ceiling 1. The knockout portion 2 a is for drawing a connection line C connected to an external receiver (not shown) into the base 2 and connecting the connection line C to the terminal plates 31 and 32 of the stator electrode portion 23.
[0022]
Next, a connection structure of the rotation support 3 to the base 2 will be described. As shown in FIGS. 1 and 2A, a plurality of L-shapes arranged at an interval of 180 degrees on a radius centered on the rotating shaft 5 are provided on the inner surface of the cover 4 of the rotating support 3. Are formed, and a clamp claw 35 urged in the outer peripheral direction is provided movably in the radial direction. The tip of the clamp claw 35 projects from the outer periphery of the cover 4 as an operation unit 36. Then, as shown in FIG. 2 (b), the base 2 is formed with an arc-shaped long hole 37 which is slidably fitted to the locking claw 34. A wide portion 37a is formed at one end of each of the long holes 37 so as to allow the engagement and removal of the engagement claw 34, and the other portion is engaged with the tip of the engagement claw 34 to engage the engagement claw. A narrow portion 37b is formed in order to prevent the 34 from falling out. Further, two grooves 38 are formed on the inner surface of the base 2 at an interval of 180 degrees. These grooves 38 are formed so as to form locking recesses (not shown) on the inner periphery of a peripheral wall 39 formed on the peripheral edge of the base 2. The tip of the clamp claw 35 is engaged with the locking recess.
[0023]
In such a configuration, when the operating portion 36 is pushed to retreat the clamp claw 35 inward in the radial direction and the locking claw 34 of the cover 4 is inserted into the wide portion 37 a of the elongated hole 37, the base 2 and the cover 4 are disengaged. The edges touch. Then, when the user releases the clamp claw 35 and rotates the cover 4 with respect to the base 2, the locking claw 34 of the cover 4 engages with the narrow portion 37 b of the long hole 37 of the base 2. By the rotation of the cover 4, the tip of the clamp claw 35 slides on the peripheral wall 39 of the base 2, and when the locking claw 34 reaches the end of the elongated hole 37, the tip of the clamp claw 35 is Engagement with the locking recesses at the ends prevents rotational movement of the cover 4 relative to the base 2. That is, the rotating support 3 is connected to the base 2. When disassembling both, the operating portion 36 is pressed to retract the tip of the clamp claw 35 from the locking recess, and the cover 4 is rotated until the locking claw 34 reaches the wide portion 37 a of the long hole 37. Then, the cover 4 is removed from the base 2.
[0024]
When the alarm device A is installed, in the case of an exposed wiring, the base 2 is fixed to a building material such as the ceiling 1 by a mounting screw 40 (see FIG. 2B) and then connected to a receiver (not shown). The obtained electric wire C is drawn into the knockout portion 2a (see FIG. 1), and the electric wire C is connected to the terminal plates 31 and 32 by terminal screws 41 (see FIGS. 2B and 3). Conventionally, since the knockout portion is formed on the mounting surface side of the base 2 with respect to the ceiling 1, the base 2 can be mounted on the ceiling 1 or the like only in a state where the electric wire C passes through the knockout portion. If the base 1 is attached to a building material such as the ceiling 1 in a state where the electric wire C is forgotten, the base 2 must be reattached, and it is troublesome if the operation procedure is wrong. However, in this example, since the knockout portion 2a is formed on a part of the outer peripheral surface of the base 2 on the cover 4 side, the base 2 can be attached alone to the ceiling 1 or the like regardless of the insertion of the electric wire C, Workability is good. The same effect can be obtained even if the knockout portion is formed on a part of the outer peripheral edge of the cover 4.
[0025]
In this case, the portion of the rotary shaft 5 of the rotary support 3 and the sensor main body 6 can be rotated indefinitely in the direction around the axis of the rotary shaft 5 as shown in FIG. Can be oriented in any direction. In this case, even if the sensor main body 6 is rotated too many times, the connection shafts 20a and 20b are not twisted because the rotating shaft 5 and the rotor electrode unit 22 rotate integrally.
[0026]
Further, the sensor body 6 is provided rotatably and freely fixed at an arbitrary position in a plane parallel to the virtual perpendicular with a point on a virtual perpendicular passing through the center of the radius of the ring-shaped contacts 24 and 25 as the center of the radius. I have. That is, as shown in FIG. 5, the sensor main body 6 can rotate vertically about the shaft 10 at the lower end of the rotating shaft 5, so that the orientation of the pyroelectric sensor 14 can be aligned with the upper body of the human body. . In the present embodiment, the vertical adjustment range of the sensor body 6 is set such that the angle α upward from the horizontal position is about 15 degrees and the angle β downward from the horizontal position is about 90 degrees. Thus, even when the pyroelectric sensor 14 is mounted on a wall or a desk, the direction of the pyroelectric sensor 14 can be adjusted to a desired direction. As described above, the sensor main body 6 can be rotated in two directions (horizontal and vertical directions) without worrying about the twist of the connection wires 20a and 20b. In this case, there is no limit in one direction (horizontal direction). Since it can be rotated, the pyroelectric sensor 14 can be oriented in a desired direction after the base 1 is attached to a preset position, and thus the detection accuracy can be increased.
[0027]
Further, according to the configuration of the present invention, with the lens cover 18 removed from the window 8a on the front surface of the sensor main body 6, the infrared condenser lens 16 functions as a compound eye lens, and the lens cover 18 is fitted to the window 8a. In this state, only the central eye 16a is opened by the small hole 18a, and the surrounding plural eyes 16b are shielded by the light-shielding portion 18b, so that the infrared condenser lens 16 can function as a monocular lens. In this example, when functioning as a compound eye lens, the infrared light condensing lens 16 condenses infrared light having a diameter of 1.2 m on the optical axis 5 m ahead to the pyroelectric sensor 14. When functioning as a monocular lens, an infrared ray having a diameter of 0.4 m on the optical axis 5 m ahead is focused on the pyroelectric sensor 14. As described above, by selecting the attachment / detachment state of the lens cover 18, the light distribution pattern of the infrared condenser lens 16 can be changed, so that the detection of the pyroelectric sensor 14 can be performed without adjusting the distance to the object. The size of the range can be changed. Therefore, the change of the installation position of the alarm device A can be reduced.
[0028]
Further, during maintenance of the pyroelectric sensor 14, the rotary support 3 can be easily removed from the base 2 without using a tool.
[0029]
【The invention's effect】
[0030]
According to the first aspect of the present invention, the infrared condensing lens has a compound-eye lens structure, and the lens cover has a small hole that allows the infrared condensing lens to function as a single- eye lens and a light-shielding element that loses the function as a compound eye lens. The infrared condensing lens can function as a compound eye lens with the lens cover removed, and can function as a monocular lens with the lens cover attached. With this selection, it is possible to change the light distribution pattern of the infrared condensing lens and change the size of the detection range of the pyroelectric sensor without changing the distance to the object to be detected.
[0031]
According to the second aspect of the present invention, the lens cover is formed of a material that attenuates the response wavelength range of the pyroelectric sensor and elastically bends, and is elastically deformable on the inner peripheral edge of the window of the sensor body. , The sensor cover can be attached and detached to the window of the sensor body with one touch.
[0032]
According to the invention of claim 3 , the support has a rotating shaft rotatable on an axis perpendicular to the mounting surface with respect to the building material and freely fixed at an arbitrary position, and the human body detecting device is supported on the rotating shaft. because there, the orientation of the pyroelectric sensor, it is possible to regulated in an arbitrary direction integer of rotation around the center of the rotation shaft. Thereby, the change of the mounting position with respect to the building material can be reduced.
[0033]
According to the invention of claim 4 , the human body detecting device is supported by the rotating shaft so as to be freely rotatable and freely fixed at an arbitrary position in a plane parallel to the axis thereof. It can be adjusted not only in the direction around the axis, but also in the direction parallel to the axis of the rotation axis. Thereby, the change of the mounting position with respect to the building material can be further reduced.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view showing a configuration of a main part of a wiring connection device and an alarm device according to an embodiment of the present invention. FIG. 2 (a) is a plan view showing an inner surface of a cover of a rotating support, FIG. 3B is a plan view showing the inner surface of the base body. FIG. 3 is a vertical sectional side view showing a part of the structure of a stator electrode portion. FIG. 4 is a view showing a sensor body, and FIG. FIG. 5 (b) is a front view showing a state in which a lens cover is mounted. FIG. 5 is a side view showing a reduced mounting relationship between the base and the rotating support. FIG. 6 is a mounting relationship between the base and the rotating support. Front view showing reduced size [Explanation of reference numerals]
1; building material 3; support 5; rotating shaft 6; sensor body 8a; window 14; pyroelectric sensor 16; infrared condensing lens 18; lens cover 18a; small hole 18b; Human body detection device

Claims (5)

A pyroelectric sensor;
An infrared condensing lens disposed on the front surface of the pyroelectric sensor, having a single eye at the center, and having a compound eye lens structure in which a plurality of eyes are arranged in a ring around the central eye ;
A sensor body having a window facing the front surface of the infrared condensing lens and supporting the pyroelectric sensor and the infrared condensing lens therein;
A small hole that is detachably attached to the window of the sensor body and is provided to face the central unit of the infrared condensing lens, and a plurality of annular holes are provided around the central unit of the infrared condensing lens. A lens cover having a light-shielding portion provided so as to face the single eye, wherein the lens cover loses the function of the infrared condensing lens as a compound eye lens and functions as a monocular lens when attached to a window of the sensor body ;
A human body detection device comprising: The lens cover is formed of a material that attenuates the response wavelength range of the pyroelectric sensor and elastically bends, and includes a fitting portion elastically deformably fitted to an inner peripheral edge of a window of the sensor body. The human body detecting device according to claim 1 , wherein the human body detecting device is provided. A human body detection device according to claim 1 or 2 ;
A support for supporting the human body detection device;
A receiver that receives a detection signal from the human body detection device and issues an alarm;
An alarm device comprising: 4. The support according to claim 3, wherein the support has a rotating shaft rotatable on an axis perpendicular to a mounting surface for the building material and freely fixed at an arbitrary position, and the human body detecting device is supported on the rotating shaft. The alarm device as described. 5. The alarm device according to claim 4, wherein the human body detecting device is supported on the rotating shaft so as to be freely rotatable and freely fixed at an arbitrary position in a plane parallel to the axis.

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