JP2021071746A - Compound-eye-type human detection device - Google Patents

Abstract

To provide a highly reliable compound-eye-type human detection device capable of arranging expansion between detection zones at a position having a good balance of identification that a person is detected and a small animal is not detected at each arrangement height and each caution distance.SOLUTION: A compound-eye-type human detection device includes: a power transmission mechanism (groove cam disk 14 and shaft 16) for changing an arrangement angle of at least one of optical units (11a or 11b), so as to change an arrangement angle of the other optical unit (11b or 11a) to be larger or smaller than the angular change; and a mechanism for changing the power transmission mechanism from a first power transmission mechanism state into a second power transmission mechanism state, so as to change an arrangement angle of the one or both of the optical units.SELECTED DRAWING: Figure 4

Description

The present invention relates to a compound eye type human body detection device in which detection zones arranged along the intrusion direction of an object to be detected are arranged in two upper and lower stages.

As a human body detection device for crime prevention that detects a human moving in a predetermined space, a passive infrared detection device that detects infrared rays emitted from an object is often used. This device focuses infrared energy on a pyroelectric element with a condenser such as a concave mirror or a Fresnel lens, and determines the presence or absence of a human body based on the detection signal obtained from the pyroelectric element. ..

Since the human body detection device may generate false reports by small animals other than humans, as a countermeasure, two detection zones consisting of two optical system units consisting of a pyroelectric element and a condenser are arranged one above the other. A compound-eye human body detection device that generates an alarm output signal to activate an alarm when an intruding object crosses both of them at the same time has been put into practical use. In this compound eye type human body detection device, two detection zones extend with a certain spread angle, and in the present invention, the term "parallel" is used even when the two detection zones extend with a certain spread angle. To.

When the intruding object detection range is changed from the setting for detecting a person passing a long distance to the setting for detecting a person passing a short distance, as in Patent Document 1, the arrangement angle of one of the optical system units is changed. By changing the arrangement angle of the other optical system unit to a larger extent, the distance between the upper detection zone and the lower detection zone becomes larger as the extension direction of the detection zone is changed downward. Some of them are provided with a means for changing the interval of the detection zone.

Further, when the installation height is set from a low position to a high position, as in Patent Document 2, each optical system unit is switched so as to move individually and the arrangement angle is changed to change the upper detection zone and the lower detection zone. There is a thing provided with a means for changing the interval of the detection zone which changes so that the interval with the detection zone of is small.

International Publication No. WO98 / 34085 JP 2016-001424

However, in the conventional compound eye type human body detection device, two optical system units are interlocked when adjusting the perspective of the intruding object detection range, and the optical system units are individually moved when adjusting the height of the installation height. Since it is a mechanism, it was necessary to switch between the interlocking mechanism and the individual mechanism when adjusting each. In addition, in order to realize a mechanism that adjusts each, the number of parts increases, such as using two or more groove cam disks, and a complicated mechanism that performs both connection for the interlocking mechanism and separation for the individual mechanism. Was necessary.

In order to solve the above problems, the present invention presents a detection zone extending in a direction to be monitored in a predetermined space, and another detection zone extending in parallel with the direction corresponding to the detection zone above or below the detection zone. In a compound-eye human body detection device that generates an alarm output signal to activate an alarm when an intruding object crosses both of the two detection zones at the same time, the intruding object detection range is set to a long distance. When changing from the setting to detect a passing person to the setting to detect a person passing a short distance, the upper detection zone and the lower detection zone are changed as the extension direction of the detection zone is changed downward. When the first detection zone interval changing means for changing the interval is provided and the installation height is set from a low position to a high position, the interval between the upper detection zone and the lower detection zone is changed to be smaller. A second detection zone interval changing means is provided, and the two detection zones are detection zones composed of an optical system unit composed of a pyroelectric element and a condenser, respectively, and the first detection zone interval changing means. Is a power transmission mechanism in which the arrangement angle of the other optical system unit is changed to be larger or smaller than the angle change as the arrangement angle of one of the optical system units is changed. The changing means is a mechanism for changing the arrangement angle of one or both optical system units by changing the power transmission mechanism from the first power transmission mechanism state to the second power transmission mechanism state.

In the present invention, in the compound eye type human body detection device that controls the spread between the detection zones at each installation height and each warning distance, the spread between the detection zones is arranged at a position where the identification that detects humans and does not detect small animals is well-balanced. It is possible to realize a highly reliable compound eye type human detection device. In addition, when adjusting the height of the installation height, complicated operations are not required, and the power transmission mechanism can be changed from the first power transmission mechanism state to the second power transmission mechanism state to form the upper detection zone. The distance from the lower detection zone can be easily changed.

It is a side sectional view which shows the detection system arrangement of the 1st Embodiment of the compound eye type human body detection apparatus of this invention. It is a side sectional view which shows the detection system arrangement of the 2nd Embodiment of the compound eye type human body detection apparatus of this invention. It is a side sectional view which shows the structure of a general optical system unit. It is a figure which showed the operation mechanism of the optical system unit in 1st Embodiment of the compound eye type human body detection apparatus of this invention. It is a figure which showed the operation mechanism of the optical system unit in 2nd Embodiment of the compound eye type human body detection apparatus of this invention. It is a figure which showed the structure of the 2nd Embodiment of the compound eye type human body detection apparatus of this invention. It is a figure which showed the state which the cover was removed in the 2nd Embodiment of the compound eye type human body detection apparatus of this invention.

FIG. 1 is a side sectional view showing a detection system arrangement according to a first embodiment of the compound eye type human body detection device of the present invention. FIG. 1 (a) shows the case of installation in a low place, and FIG. 1 (b) shows the case of installation in a high place. The compound-eye human body detection device S constitutes two detection zones extending in parallel, and generates an alarm output signal for activating an alarm when an intruding object crosses both of the two detection zones at the same time. To do.

In FIG. 1A, detection zones A1 and B1 are two detection zones configured during long-distance alert, and detection zones A1'and B1'are two detection zones configured during short-distance alert. .. F1 indicates the floor surface when the detector 1 is installed in a low place, H indicates a human being, and N indicates a small animal such as a mouse.

During long-distance alert, two detection zones are configured in detection zone A and detection zone B, and during short-distance alert, the detection zone is moved so that the angle is α <β, and the detection zone A1'and the detection zone Two detection zones are configured with B1'. Human H crosses two detection zones at the same time during both long-distance alert and short-distance alert. However, the small animal N may cross the detection zone A and the detection zone B separately, but not both at the same time. Even if the warning distance is changed from long-distance warning to short-range warning, the distance between the two detection zones is maintained, which is a countermeasure against false alarms for small animals.

In this state, the floor surface when installed in a high place becomes F2. When installed in a high place, the distance between the detection zones becomes too wide compared to when installed in a low place, and it is difficult for human H to pass through both of the two detection zones at the same time. Even if a human enters the intruding object detection range in which S generates an alarm output signal, the alarm output signal cannot be generated (report is lost).

In FIG. 1B, the lower detection zone is moved toward the upper detection zone so that the distance between the two detection zones becomes smaller in order to prevent false alarms. As shown in FIG. 1B, in the long-distance warning, the lower detection zone is moved from the position of B1 to the position of B2, and in the short-distance warning, the lower detection zone is moved from the position of B1'to the position of B2'. As a result, it is possible to set an appropriate distance between the two detection zones, and it is possible to reduce false alarms caused by humans and small animals when installed in high places. The distance between the two detection zones is not limited to two stages of low-altitude installation and high-altitude installation, but may be three or more stages depending on the installation height, and is fixed at an arbitrary position as stepless. You may be able to do it.

Next, the operating mechanism of the optical system unit will be described. FIG. 3 is a side sectional view showing the configuration of a general optical system unit used in the embodiment of the present invention. The optical system unit is composed of a concave mirror M and a pyroelectric element E fixed at the focal position thereof, and forms a detection zone C.

FIG. 4 is a diagram showing an operating mechanism of the optical system unit according to the first embodiment of the compound eye type human body detection device of the present invention. A groove cam disc 14 in which pins 13a and 13b provided on the optical system units 11a and 11b similar to those in FIG. 3 are attached between the optical system units 11a and 11b in a state in which the shaft 16 can rotate around the shaft 16. They are connected so as to be located in the grooves 15a and 15b.

First, the operation mechanism for changing from the long-distance alert state to the short-distance alert state in the case of installation in a low place will be described with reference to the state change from FIG. 4 (a) to FIG. 4 (b). When the optical system unit 11a is rotated downward (counterclockwise) from the state shown in FIG. 4A, the pin 13a is in contact with the groove 15a of the groove cam disc 14, so that the groove cam is centered on the shaft 16. Rotate the disc 14 clockwise. By rotating the groove cam disk 14 clockwise, the pin 13b is rotated counterclockwise through the groove 15b, and the optical system unit 11b is rotated downward (counterclockwise). When the optical system unit 11a rotates from the state of FIG. 4A to the state of FIG. 4B by the same mechanism as that of FIG. 6 disclosed in Patent Document 1, the optical system unit 11b is interlocked with each other. It rotates, and the rotation angle of the optical system unit 11b is larger than the rotation angle of the optical system unit 11a.

Next, the operation mechanism for changing from low-place installation to high-place installation will be described with reference to the state change from FIG. 4 (a) to FIG. 4 (c). The shaft 16 of the groove cam disc 14 is moved counterclockwise around the pin 13a. The movement of the shaft 16 of the groove cam disc 14 causes the pin 13b to rotate clockwise and the optical system unit 11b to rotate upward (clockwise).

The angle between the straight line passing through the shaft 12a and the pin 13a which is the rotation axis of the optical system unit 11a and the straight line passing through the shaft 12b and the pin 13b which is the rotation axis of the optical system unit 11b is changed, and the optical system unit 11a is changed. While fixed, only the optical system unit 11b can be rotated upward (clockwise), and the distance between the two detection zones can be reduced.

By moving the shaft 16 of the groove cam disk 14 around the pin 13a to change the state of the power transmission mechanism, the distance between the two detection zones can be reduced. Further, even after the change to the state of the power transmission mechanism installed in a high place, when the optical system unit 11a rotates, the optical system unit 11b rotates in conjunction with the state of the power transmission mechanism installed in a low place, and the optics The rotation angle of the optical system unit 11b is larger than the rotation angle of the system unit 11a, and it is possible to change from the long-distance alert state to the short-distance alert state.

FIG. 2 is a side sectional view showing a detection system arrangement of a second embodiment of the compound eye type human body detection device of the present invention. FIG. 2 (a) shows the case of installation in a low place, and FIG. 2 (b) shows the case of installation in a high place. The compound-eye human body detection device S constitutes two detection zones extending in parallel, and generates an alarm output signal for activating an alarm when an intruding object crosses both of the two detection zones at the same time. To do. FIG. 2A is the same as FIG. 1A, and the description thereof will be omitted.

In FIG. 2B, both the upper detection zone and the lower detection zone are moved toward the other detection zone so that the distance between the two detection zones is reduced in order to prevent false alarms. As shown in FIG. 2B, the upper detection zone is moved from the position of A1 to the position of A3 in the long-distance warning, the lower detection zone is moved from the position of B1 to the position of B3, and the upper detection zone is moved in the short-distance warning. Is moved from the position of A1'to the position of A3', and the lower detection zone is moved from the position of B1'to the position of B3'. As a result, it is possible to set an appropriate distance between the two detection zones, and it is possible to reduce false alarms caused by humans and small animals when installed in high places. The distance between the two detection zones is not limited to two stages of low-altitude installation and high-altitude installation, but may be three or more stages depending on the installation height, and is fixed at an arbitrary position as stepless. You may be able to do it.

Next, the operating mechanism of the optical system unit will be described. FIG. 5 is a diagram showing an operating mechanism of the optical system unit according to the second embodiment of the compound eye type human body detection device of the present invention. Similar to the first embodiment, the pins 13a and 13b provided on the optical system units 11a and 11b are grooved between the optical system units 11a and 11b so as to be rotatable around the shaft 16 as a rotation axis. The cam discs 14 are connected so as to be located in the grooves 15a and 15b.

The change operation mechanism from the long-distance alert state to the short-distance alert state in the case of low-place installation is performed by changing the state from FIG. 5 (a) to FIG. 5 (b), and is the same as the first embodiment. Therefore, the description is omitted.

Next, the operation mechanism for changing from low-place installation to high-place installation will be described with reference to the state change from FIG. 5 (a) to FIG. 5 (c). The shaft 16 of the groove cam disc 14 is moved upward (toward the ceiling). By moving the shaft 16 of the groove cam disk 14, both the pin 13a and the pin 13b move upward (toward the ceiling), the optical system unit 11a moves downward (counterclockwise), and the optical system unit 11b Will rotate upwards (clockwise).

The angle between the straight line passing through the shaft 12a and the pin 13a, which is the rotation axis of the optical system unit 11a, and the straight line passing through the shaft 12b and the pin 13b, which is the rotation axis of the optical system unit 11b, is changed, and the two optical system units are changed. Can work together to reduce the distance between the two detection zones.

By moving the shaft 16 of the groove cam disc 14 upward (toward the ceiling) and changing the state of the power transmission mechanism, the distance between the two detection zones can be reduced. Further, even after the change to the state of the power transmission mechanism installed in a high place, when the optical system unit 11a rotates, the optical system unit 11b rotates in conjunction with the state of the power transmission mechanism installed in a low place, and the optics The rotation angle of the optical system unit 11b is larger than the rotation angle of the system unit 11a, and it is possible to change from the long-distance alert state to the short-distance alert state.

In both the first embodiment and the second embodiment, the detection zone corresponding to the installation height can be easily adjusted only by changing the state of the power transmission mechanism. Moreover, since the groove cam disc can be adjusted by one instead of two, the number of parts is reduced and the productivity is improved.

FIG. 6 is a diagram showing a configuration of a second embodiment of the compound eye type human body detection device of the present invention. It is composed of a cover 41, optical system units 11a and 11b, a groove cam disk 14, a switching lever 21, a chassis 31, and a printed circuit board Pc. The cover 41 uses a material having a high infrared transmittance such as high-density polyethylene.

The optical system unit 11a includes a printed circuit board Pa on which a concave mirror (not shown), a pyroelectric element Ea, and an electronic component (not shown) are mounted. Similarly, the optical system unit 11b includes a concave mirror (not shown), a pyroelectric element Eb, and a printed circuit board Pb on which electronic components (not shown) are mounted. A printed circuit board Pc on which electronic components (not shown) are mounted is fixed to the chassis 31, and the printed circuit board Pc and the printed circuit boards Pa and Pb are connected by a connector, a connection cord, or the like.

As described with reference to FIGS. 4 and 5, the pins 13a and 13b provided on the optical system units 11a and 11b are attached between the optical system units 11a and 11b in a state in which the shaft 16 can be rotated as a rotation axis. The groove cam disc 14 is connected so as to be located in the groove 15a and the groove 15b.

The chassis 31 is provided with support portions 34a and 34a'for holding the optical system unit 11a, support portions 34b and 34b' for holding the optical system unit 11b, and a support portion 32 for holding the groove cam disk.

The shaft 12a (12a'), which is the rotation axis of the optical system unit 11a, enters the hole 35a (35a') of the support portion 34a (34a'), and the optical system unit 11a is held by the chassis 31. The shaft 12b (12b'), which is the rotation axis of the optical system unit 11b, enters the hole 35b (35b') of the support portion 34b (34b'), and the optical system unit 11b is held by the chassis 31.

The shaft 16 of the groove cam disc 14 enters the elongated hole 33 of the support portion 32, and the shaft 22 serving as the rotation axis of the switching lever 21 enters the hole 35a of the support portion 34a. At this time, the shaft 16 of the groove cam disc 14 is inserted into the elongated hole 23 of the switching lever 21, and the groove cam disc 14 and the switching lever 21 are held by the chassis 31.
The compound eye type human body detection device is operated with the chassis 31 covered with the cover 41.

FIG. 7 is a diagram showing a state in which the cover is removed in the second embodiment of the compound eye type human body detection device of the present invention. FIG. 7A is a diagram showing a state of a power transmission mechanism installed in a low place, and FIG. 7B is a diagram showing a state of a power transmission mechanism installed in a high place.

In the state of the power transmission mechanism installed in a low place, the shaft 16 of the groove cam disk 14 is attached to the chassis 31 at the lower side (floor side) of the elongated hole 33 of the support portion 32 and the upper side (ceiling side) of the elongated hole 23 of the switching lever 21. It is held.

By rotating the switching lever 21 counterclockwise with respect to the shaft 22 in the upward direction (ceiling direction) from the state shown in FIG. 7A, the shaft 16 of the groove cam disk 14 is placed above the elongated hole 33 of the support portion 32. It is held by the chassis 31 on the (ceiling side) and on the lower side (floor side) of the elongated hole 23 of the switching lever 21, and the shaft 16 of the groove cam disk moves upward (ceiling direction).

When the shaft 16 of the groove cam disk moves upward (toward the ceiling), the optical system unit 11a moves downward (counterclockwise) and the optical system unit 11b moves upward (clockwise) as described with reference to FIG. It can rotate (around) to reduce the distance between the two detection zones.

In the first embodiment and the second embodiment, the operation of changing from the long-distance alert state to the short-distance alert state is performed by rotating the optical system unit 11a and rotating the optical system unit 11b through the groove cam disk 14. As described above, with the same mechanism, the optical system unit 11b can be rotated and the optical system unit 11a can be rotated through the groove cam disk 14, the groove cam disk 14 can be rotated, and both the optical system units 11a and 11b can be rotated. You can also do it.

In the first embodiment, the shaft 16 of the groove cam disc 14 is moved around the pin 13a to change the state of the power transmission mechanism, but the shaft 16 of the groove cam disc 14 is moved around the pin 13b to change the power transmission mechanism. At this time, only the optical system unit 11a can be rotated downward (counterclockwise) while the optical system unit 11b is fixed, and the distance between the two detection zones can be changed. It can be made smaller.

In the second embodiment, when changing from low-place installation to high-place installation, the moving angle of the shaft 16 of the groove cam disc 14 may be upward (ceiling direction), and is not particularly limited. Further, the angle of the elongated hole 33 is not limited.
Further, although the shaft 12a of the optical system unit 11a and the shaft 22 of the switching lever 21 are set at the same position, holes may be provided at different positions of the chassis 31 and arranged individually.

Although the embodiments of the present invention have been described above, the above-described embodiments are presented as examples, and the scope of the present invention is not limited to these, and may be implemented in various other embodiments. It is possible and is included in the scope of the invention described in the claims and the equivalent scope thereof.

11a, 11b ... Optical system units 12a, 12a', 12b, 12b' ... Shaft 13a, 13b ... Pin 14 ... Groove cam disk 15a, 15b ... Groove 16 ... Shaft 21.・ ・ Switching lever 22 ・ ・ ・ Shaft 23 ・ ・ ・ Long hole 31 ・ ・ ・ Chassis 32 ・ ・ ・ Support part 33 ・ ・ ・ Long holes 34a, 34a', 34b, 34b' ・ ・ ・ Support parts 35a, 35a' , 35b, 35b'... Hole 41 ... Cover A, A1, A1', A3, A3'... Detection zone B, B1, B1', B2, B2', B3, B3'... Detection Zone C ... Detection zone E, Ea, Eb ... Pyroelectric element F1 ... Floor surface F2 when installed in low places ... Floor surface H when installed in high places ... Human M ... Concave mirror N ... Small animals Pa, Pb, Pc ... Printed circuit board S ... Compound eye type human body detection device

Claims (3)

A detection zone extending in a direction to be monitored in a predetermined space and another detection zone extending in parallel with the direction corresponding to the detection zone above or below the detection zone are set, and the two detection zones are set. In a compound-eye human body detection device that generates an alarm output signal to activate an alarm when an intruding object crosses both at the same time.
When changing the intruder detection range from the setting to detect a person passing a long distance to the setting to detect a person passing a short distance, the detection in the upper stage is detected as the direction in which the detection zone extends is changed downward. A first detection zone interval changing means for changing the distance between the zone and the lower detection zone is provided.
When setting the installation height from a low position to a high position, a second detection zone interval changing means for changing the distance between the upper detection zone and the lower detection zone is provided.
The two detection zones are detection zones composed of an optical system unit composed of a pyroelectric element and a condenser, respectively.
The first detection zone interval changing means is a power transmission mechanism in which the arrangement angle of the other optical system unit is changed to be larger or smaller than the angle change as the arrangement angle of one of the optical system units is changed. age,
The second detection zone interval changing means is a mechanism for changing the arrangement angle of one or both optical system units by changing the power transmission mechanism from the first power transmission mechanism state to the second power transmission mechanism state. A compound-eye type human body detection device characterized by In the compound eye type human body detection device according to claim 1,
The optical system unit 11a forming the upper detection zone and the optical system unit 11b forming the lower detection zone are provided, and the pins 13a and 13b provided on the optical system units 11a and 11b are the optical system units 11a. It is connected so as to be located in the grooves 15a and 15b of the groove cam disk which is rotatably attached to 11b.
The second detection zone interval changing means is
By changing the position of the rotation axis of the groove cam disk, a straight line passing through the rotation axis of the optical system unit 11a and the pin 13a and a straight line passing through the rotation axis of the optical system unit 11b and the pin 13b can be obtained. Change the angle of
A compound eye type human body detection device characterized in that the power transmission mechanism is a mechanism that changes the power transmission mechanism from the first power transmission mechanism state to the second power transmission mechanism state. In the compound eye type human body detection device according to claim 1,
The optical system unit 11a forming the upper detection zone and the optical system unit 11b forming the lower detection zone are provided, and the pins 13a and 13b provided on the optical system units 11a and 11b are the optical system units 11a. It is connected so as to be located in the grooves 15a and 15b of the groove cam disk which is rotatably attached to 11b.
The second detection zone interval changing means is
A straight line passing through the rotation axis of the optical system unit 11a and the pin 13a, the rotation axis of the optical system unit 11b, and the above so that the optical system unit 11a and the optical system unit 11b rotate in opposite directions. Change the angle with the straight line passing through the pin 13b,
A compound eye type human body detection device characterized in that the power transmission mechanism is a mechanism that changes the power transmission mechanism from the first power transmission mechanism state to the second power transmission mechanism state.

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