JPH02263192A - Heat-wave ultrasonic composite type burglar sensor - Google Patents

Abstract

PURPOSE:To prevent an ultrasonic wave from turning into the inside of a cover housing by turning simultaneously an ultrasonic horn, as well by a connecting means, when a reflecting mirror is turned, and allowing the ultrasonic horn not to be inclined, when the reflecting mirror is inclined. CONSTITUTION:In the rotational direction of a reflecting mirror 2, an ultrasonic horn 5 rotates synchronously, but even if the reflecting mirror 2 is inclined in the direction being orthogonal to the rotational direction, namely, to the left and the right, the ultrasonic horn 5 is not inclined in the direction of the left and the right. Therefore, no gap is made between an opening part of the ultrasonic horn 5 and a cover housing 4. Accordingly, it can be eliminated that an ultrasonic wave generated from an ultrasonic vibrator 8 contained in the ultrasonic horn 5 turns into the inside of a sensor housing, and a beam of the ultrasonic wave being an object cannot be formed in the direction indicated by the reflecting mirror 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a heat-ray/ultrasonic hybrid security sensor used in a security sensor that combines an ultrasonic detection method and a heat-ray detection method.

(Prior Art) Fig. 6 is an example of a Hitotsubashi structure that holds the reflector 2 of the heat-ray sensor 1 and the ultrasonic horn 5 of the ultrasonic sensor in a conventional combined ultrasonic and hot-wire sensor. In,
The reflecting mirror 2 of the heat ray sensor 1 has a spherical bottom surface and is rotatable so that the direction of the detection area formed by the heat ray beam can be varied. Further, the reflecting mirror 2 is structured to be tilted left and right by 0 to 5 degrees so that the direction of the detection area formed by the heat ray beam can be finely adjusted in left and right directions. Therefore, as the reflecting mirror 2 tilts, the ultrasonic horn 5, which is an integral structure, also tilts left and right.

[Problems to be Solved by the Invention] In the case of the above-described structure, if the outer shape (cover housing 4) of the composite sensor is as shown in FIG. As a result, a gap is created between the opening of the ultrasonic horn 5 and the cover housing 4, and the ultrasonic waves emitted from the vibrator housed in the ultrasonic horn 5 may enter the inside of the cover housing 4 or cause the reflection mirror to pass through. There was a problem that the desired ultrasonic beam could not be formed in the direction indicated by 2.

The present invention has been made in view of the above points, and its purpose is to provide a structure in which the ultrasonic horn of the ultrasonic sensor does not tilt even if the reflector of the heat-ray sensor tilts in the left and right directions. The purpose of the present invention is to provide a heat ray/ultrasonic hybrid security sensor.

[Means for Solving the Problems] The present invention provides an ultrasonic sensor in which a reflecting mirror of a hot wire sensor is rotatably supported in one direction and arranged so as to be tiltable in a direction perpendicular to the rotation direction. Ultrasonic horns are arranged on both sides of the reflector in the tilted direction of the reflector so as to be freely rotatable in the same direction as the rotation direction of the reflector, and both ultrasonic horns are rotated along with the rotation direction of the reflector. The reflecting mirror and the ultrasonic horn are connected by a connecting means in which the ultrasonic horn is immovable in the direction of inclination of the reflecting mirror.

[Function] According to the present invention, when the reflecting mirror is rotated, the ultrasonic horn is simultaneously rotated by the connecting means, and when the reflecting mirror is tilted, the ultrasonic horn is not tilted. It is.

[Example 1] Hereinafter, an example of the present invention will be described with reference to the drawings. 2 and 3 show cross-sectional views of the composite sensor of the present invention. The hot wire sensor 1 is attached to a reflector 2 and integrated with the reflector 2 using a long chassis 3 as a support, as shown by the arrow in FIG. It can be rotated in any direction. The operation of this hot wire sensor 1 is as follows. That is, the heat generated by the human body passes through the PIR housing 4 that transmits heat rays, is reflected and received by the reflecting mirror 2, and is received by the heat ray sensor 1.

The ultrasonic horn 5 is supported by a rotating shaft 6 and rotates about the rotating shaft 6 in the direction of the arrow in FIG. 3. That is, the ultrasonic horn can rotate in the same direction as the hot wire sensor 1. The operation of the ultrasonic sensor is as follows. The continuous ultrasonic wave transmitted from the ultrasonic transducer 8 is transformed into a target directional beam by the ultrasonic horn 5 and the US housing 7, and the Doppler effect is caused by a moving object within the detection area, and the frequency The reflected waves that have changed are the US housing 7 and the ultrasonic horn 5.
and is received by the ultrasonic transducer 8. Then, when the output from the hot wire sensor 1 and the ultrasonic sensor occurs,
It outputs a detection output assuming that a moving object, that is, a human body, is present.

Further, as shown in FIG. 1, the ultrasonic horns 5 for transmitting and receiving waves are arranged on both sides of the hot wire sensor 1, and both ultrasonic horns 5 are mounted on U-shaped plate springs. 10 tips, respectively. - side, reflector 2 of heat-ray sensor 1
A US bar 9, which is a connecting body, protrudes from the bottom, and the tip of the US bar 9, which is made of rod-shaped metal, is connected to the substantially central portion of the leaf spring 10. Therefore, in the direction of rotation of the reflecting mirror 2, the ultrasonic horn 5 is rotated synchronously by the US bar 9 and the leaf spring 10. However, if the reflector 2 is tilted left or right, even if the US bar 9 is tilted, the leaf spring 1
The deflection direction is 0, and the force is absorbed, and the ultrasonic horns do not tilt to the left or right. In addition, the above US bar 9
and the plate spring 10 constitute a connecting means.

Therefore, the ultrasonic horn 5 rotates synchronously with the rotating direction of the reflecting mirror 2, but even if the reflecting mirror 2 is tilted in a direction perpendicular to the rotating direction, that is, to the left or right in FIG. Therefore, there is no gap between the opening of the ultrasonic horn 5 and the cover housing 4, and the ultrasonic waves emitted from the ultrasonic transducer 8 housed in the ultrasonic horn 5 are prevented. This prevents the ultrasonic wave from going around inside the sensor housing and from being unable to form a targeted ultrasonic beam in the direction pointed by the reflecting mirror 2.

[Embodiment 2] FIGS. 4 and 5 show another embodiment in which both ultrasonic horns 5 are connected by a U-shaped metal connecting body 11, and the central piece of this connecting body 11 At the center of 11a, reflector 2
When the connecting part 12 formed on the bottom 2a of the outer surface of the reflector 2 is hooked and the reflecting mirror 2 is tilted left and right, the connecting part 12 of the bottom 2a of the reflecting mirror 2 slides, and the connecting body 11 is tilted left and right. It is made so that it cannot move. Incidentally, FIG. 5 shows a drawing in which the ultrasonic horn 5 is omitted.

The connecting portion 12 is formed in a concave shape on the outer surface of the bottom portion 2a of the reflecting mirror 2, as shown in the figure.
When the center part of the center piece 11a of the connecting body 11 is loosely fitted into the center part of the connecting body 11 and the reflecting mirror 2 is rotated, the center piece 11a fits into the connecting part 1.
2 and rotate the ultrasonic horn 5 synchronously via the connecting body 11. However, when the reflecting mirror 2 is tilted to the left or right, since the connecting part 12 is concave, the connecting part 11 can only be moved in the left-right direction of the center piece 11a, and the connecting body 11 can be moved in the left-right direction. Therefore, the ultrasonic horn 5 does not tilt in the left and right directions.

Note that the connecting body 11, the connecting portion 12, etc. constitute a connecting means.

[Effects of the Invention] As described above, the present invention provides an ultrasonic sensor in which the reflecting mirror of a hot-wire sensor is rotatably supported in one direction and arranged so as to be tiltable in a direction perpendicular to the rotation direction. Ultrasonic horns are arranged on both sides of the reflector in the tilted direction of the reflector so as to be freely rotatable in the same direction as the rotation direction of the reflector, and both ultrasonic horns are rotated along with the rotation direction of the reflector. Since the reflecting mirror and the ultrasonic horn are connected by a connecting means in which the ultrasonic horn is immovable in the direction of inclination of the reflecting mirror, when the reflecting mirror is rotated, the connecting means The ultrasonic horn is also rotated at the same time, and when the reflector is tilted, the ultrasonic horn is not tilted. Therefore, the ultrasonic horn rotates synchronously in the direction of rotation of the reflector, but Even if the reflector is tilted in a direction perpendicular to the direction of rotation,
The ultrasonic horn does not tilt in that direction, so there is no gap between the opening of the ultrasonic horn and the cover housing, and the ultrasonic waves emitted from the ultrasonic vibrator housed in the ultrasonic horn This has the effect that the ultrasonic wave does not go around inside the sensor housing and that the aimed ultrasonic beam cannot be formed in the direction pointed by the reflecting mirror.

[Brief explanation of drawings]

Fig. 1 is a cutaway front view of an embodiment of the present invention, Fig. 2 is a sectional view of the same as seen from the front, Fig. 3 is a sectional view of the same as seen from the side, and Fig. 4 is a cutaway front view of another embodiment. 5 is an explanatory view of the same as above, FIG. 6 is a front view of the conventional example, and FIG. 7 is a cutaway front view of the same. 1 is a hot wire sensor, 2 is a reflector, and 5 is an ultrasonic horn. Agent Patent Attorney Ishi 1) Chief 7 Figure 2 District 3 Figure 4 Figure 5/δ6 Figure 7

Claims (1)

[Claims] (1) A heat-ray sensor that detects the human body by receiving heat rays emitted from the human body through a reflecting mirror, and a Doppler-type ultrasonic sensor that detects moving objects using continuous waves of ultrasonic waves. In a composite security sensor that uses and outputs detection results simultaneously, the reflector of the hot-wire sensor is pivoted so that it can rotate in one direction, and is arranged so that it can tilt in a direction perpendicular to the direction of rotation. , the ultrasonic horns of the ultrasonic sensor are arranged on both sides of the reflector in the direction of the inclination of the reflector so that they can freely rotate in the same direction as the rotation direction of the reflector, and A hot wire/ultrasonic hybrid crime prevention device characterized in that the reflecting mirror and the ultrasonic horn are connected by a connecting means in which the ultrasonic horn is rotated and the ultrasonic horn is immovable in the direction of inclination of the reflecting mirror. sensor.