JP2756472B2 - Hot wire detector - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-wire detector provided with a plurality of Fresnel lens groups having different security patterns. 2. Description of the Related Art Conventionally, a hot-wire detector that detects a hot-wire emitted from a human body or the like and outputs an alarm signal, and includes a plurality of Fresnel lens groups having different alert patterns, A detector unit having a built-in heat ray detecting element such as a pyroelectric element is provided in the detector main body, and a cylindrical cover is provided around the detector unit. In several places on the side wall of the cylindrical cover, holes for fitting a Fresnel lens group are opened, and in this hole, several Fresnel lens groups having different security patterns, for example, for three-dimensional short-distance,
Three-dimensional long-distance and surface objects are fitted and fixed facing outward. Then, when the hot-wire detector is installed, the cover is rotated and arranged so that the Fresnel lens group to be used is arranged on the front surface of the hot-wire detecting element. [0003] With this, even a single hot-wire detector is provided with a plurality of Fresnel lens groups having different security patterns, and therefore can be easily replaced with a Fresnel lens corresponding to the security area. [0004] However, this is not the case.
In conventional hot-wire detectors such as these, the side of the cylindrical cover
Several Fresnel lens groups with different security patterns on the wall
Open a hole to fit the fresnel lens
Because the group was fitted, the alert direction is around the cylindrical cover
Be wary of the axial direction of the cylindrical cover
Can not be oriented, Fresnel lens group on the cylindrical cover
Questions that vigilance direction is greatly limited, which can be fitted into and realize the
There was a title. [0005] Such a warning direction restriction is, for example, in Europe.
As disclosed in Patent Application Publication No. 98521, a hemisphere
By placing a Fresnel lens on the cover
Detect heat rays from all directions to the cover as seen from the child
be able to. However, this hemispherical cover has the same
A plurality of Fresnel lenses with
360 ° horizontal rotation and vertical rotation from the inside detection element
Only achieves a detection directional characteristic of about 180 °
There is heat that detects this and emits an alarm by detecting heat rays emitted from the human body
When applied to a line detector, for example, installed on the ceiling of a guard area
In the state where it was set, the whole area was warned radially from the installation position
It is just one vigilance pattern to be realized. [0006] However, when a heat ray emitted from the human body is detected, a warning is issued.
For the hot-wire detector to report,
For example, a guard that sets an alert pattern in a plane along a window
Three-dimensional monitoring of command patterns, doors, safes, etc.
A three-dimensional security pattern is required, and the same
Or three-dimensional alert patterns, even far, middle, and near.
It is necessary to combine various patterns with different monitoring distances.
The same Fresnel lens is simply distributed over a hemisphere
Such vigilance patterns have severely restricted their uses.
There is a problem. Further, since the Fresnel lens group fitted into the cylindrical cover is fitted and fixed facing outward, the burrs generated during molding of the Fresnel lens appear on the outside and the appearance is poor. There is a problem that even an intruder can know which side is being alerted because it can be confirmed from the front. [0008] The present invention has been made in view of such a conventional problem, and a plurality of different alerts.
It is necessary to have multiple Fresnel lens groups to realize the pattern.
Thus, an object of the present invention is to provide a hot-wire detector capable of performing an optimal alert according to an installation place or an alert area . First, the present invention attaches and detaches the heat ray detecting element built in the detector body.
A substantially semi-spherical heat ray transmission cover
To set alert patterns from multiple Fresnel lenses
Hot-wire detection with a single Fresnel lens group molded inside
For vessels. The present invention relates to such a hot-wire detector,
For installation, the heat ray detection element changes the detection direction to the heat ray transmission cover.
Of the heat ray transmission cover
Is positioned selectively on the front of the heat ray detector when the wall is installed.
Divided into a first wall detector and a second wall detector
In each of the first and second wall detecting portions of the line transmitting cover,
Far point area light condensing area with different monitoring distance, middle area light condensing area
Of the alert pattern that forms the light-collecting area and the near-point area
A Fresnel lens group is provided. [0010] The present invention also relates to a hot-wire detector for ceiling installation.
The element detects the oblique direction of the hemispherical surface of the heat ray transmitting cover.
The heat ray permeable cover is
First ceiling selectively positioned in front of the heat ray detecting element
Heat detector and a second ceiling detector.
The monitoring distance of each of the first and second ceiling detectors is
Different far point light converging area, middle area light converging area and near point area
Fresnel res with different security patterns that form a converging zone
It is characterized by having a group of lenses. In the hot-wire detector according to the present invention having such a configuration, the heat- ray transmitting cover made of polyethylene or the like is used.
Each of the detection units divided into multiple
Heat-transmissive lens group
Remove the over-cover and place one of the detectors in front of the heat ray detector.
By placing it on a surface, it is easy to use
You can now change to a commandment pattern. A warning is provided inside each detection section of the heat ray permeable cover.
Integral molding of multiple Fresnel lens groups with different command patterns
This makes assembly work easier and reduces costs.
It is possible to see it because the Fresnel lens group can not be seen from the outside
Kuku on crime prevention preferable to understand the warning direction along with the good. Change
The Fresnel lens group is integrated inside the heat ray transmission cover
The shape makes it possible to fit the window groove from the outside of the Fresnel lens group.
This prevents the accumulation of dust and not only makes the windows invisible,
Keep the aesthetics, and the burrs that appear during molding do not come out
It looks good. 1A and 1B show an embodiment of the present invention.
The hemispherical portion cut from a spherical surface with a diameter of 8cm in depth 2.6cm and head (1) is obtained by the heat ray transmitting cover made of polyethylene or the like (3), annular base (1
a). The heat ray transmitting cover (3) made of polyethylene or the like is formed by integrally molding a plurality of Fresnel lens groups (2a) and (2b) having different security patterns inside. Further, the heat ray transmitting cover (3) is mounted on a base member fixed to the detector main body so as to cover the detector unit containing the heat ray detecting element. On the front surface of the detector body, Fresnel lens groups (2a) and (2b) corresponding to the caution area are mounted so as to be fitted to the heat ray transmitting cover (3) so as to be located on the front face of the heat ray detecting element. . The detector unit is
It is attached to the detector body diagonally. The Fresnel lens groups (2a) and (2b) on the figure indicate positions. In this embodiment , a hot-wire detector for ceiling is used as an example.
, The first ceiling Fresnel lens group (2a) and the second ceiling Fresnel lens group
The ceiling Fresnel lens group (2b) was integrally formed inside the heat ray transmitting cover (3). In addition, a hot-wire detector for walls
In the case of (1), the first wall Fresnel lens group (2a) and the second
Heat-transmissive cover (3) for Fresnel lens group (2b) for wall
Will be integrally molded inside. [0015] A number of compartments on the figure, spherical Fureneruren's
In the split sphere surface Furenerure <br/>emission's condenser window corresponds to that cut portions L, the partition area (plane equivalent) are each 25~400mm ^2. The partition condensing window L1 Tsude, lateral 4 to 10 °, the vertical direction detecting realm within 4 to 10 ° can be performed in conventional standard manner. The detection area is enlarged in accordance with the number of parallel sectioned light windows L. So as to correspond to positions on the sphere, when stamped from a spherical mold, which prompted spherical Furenerure <br/>down's or al the less becomes part of the undercut so as not to interfere, condensing the strip and the block-shaped Combine windows L. In the case of a hot-wire detector for a ceiling,
The first ceiling detection section (3a) and the second ceiling detection section (4a ) of the bar (3) are divided into bisectors at approximately one-third the length. First ceiling detector (3a) and second ceiling detector
(4a) a far-point area light-collecting section (5a) in each of
(5b) is a band-shaped light-collecting window group in which the spherical Fresnel lens light-condensing windows L are arranged and arranged in a band shape.
Here, a) and (7b) are block-shaped light-condensing window groups each including two divided Fresnel lens group light-condensing windows L. Further, the intermediate area light-collecting sections (6a) and (6b) are formed by a band-shaped light-collecting window group. The far-point area light condensing of the first ceiling detector (3a)
The section (5a) is spherically continuous as shown in FIG.
A single Fresnel lens focusing window L is arranged. Also
Far point area light collecting section (5b) of second ceiling detecting section (4a)
Indicates that one Fresnel lens condensing window L that is continuous in a belt shape
Are arranged. For example, as shown in FIGS.
Type detector is installed on the ceiling, and the first of the heat ray transmission cover (3)
When using the ceiling detector (3a), the horizontal rotation direction
Then, as shown in FIG. 2A, the far-point area light-collecting section (5a)
Covers approximately 80 ° and, as shown in FIG.
Covers Y ₀ = about 4 ° to 10 ° in the direct rotation direction
You. A Fresnel lens group is provided in front of the heat ray detecting element.
And for the first ceiling of FIG. 2 (B)
In the illustration of the detection section (3a), the heat ray detection element is a cover area.
Detects heat rays from the Fresnel lens group arranged in box Y
Thus, the hot-wire detector built in the hot-wire detector of the present invention
The detection direction of the sensing element is a hemispherical heat ray transmission cover.
(3) Built-in obliquely to the hemisphere
I understand. For this reason, when the ceiling is installed as shown in FIGS.
The first ceiling detector (3) of the heat ray permeable cover (3)
a) is located in front of the built-in heat ray detection element,
The second ceiling detector (4a) of the cover (3) has a built-in heat source.
It will be located behind the line detection element. When installing on the ceiling
If you want to use the second ceiling detector (4a),
The second ceiling detector (4a) of the transparent cover (3) is built in
Cover so that it is located in front of the heat detector.
It is sufficient to remove (3) and replace the position. [0020] In the hot-wire detector for ceiling installation,
Peripheral area light condensing section section (7a) of 1 ceiling detecting section (3a)
Is a light-collecting window arranged in two strips horizontally as shown in FIG.
L is a block-shaped light collecting window. For the second ceiling
The near-point light-collecting section (7b) of the detection section (4a) has a belt-like shape.
A block-shaped light collecting window composed of two light collecting windows L arranged vertically.
It is. Peripheral area collection provided in the first ceiling detector (3a)
The covering area of the light section (7a) corresponds to X in FIG.
The horizontal rotation direction is about 60 °, and the vertical direction in FIG.
Direction around the Y ₁ is about 30 °. Second ceiling detection
Coverage of the near point light condensing section 7b provided in the section (4a)
X is similar to the first ceiling detector (3a) in FIG.
Is about 60 ° and the vertical direction is
The direction is about 30 °, similar to Y ₁ in FIG. 2B . Further, an intermediate area of the first ceiling detector (3a) is provided.
The area light condensing section (6a) is horizontally arranged in a strip as shown in FIG.
It is a block-shaped light-collecting window composed of three light-condensing windows L arranged.
You. In addition, the middle area light collecting section of the second ceiling detecting section (4a)
(6b) is composed of three condensing windows L arranged vertically in a strip shape.
It is a block-shaped condensing window. Intermediate area light collection area (6
a) and (6b) cover the far point areas located on both sides.
Area condensing sections (5a) and (5b) and near point area condensing section (7
a) and (7b) are determined by the cover range, and FIG.
Between Y ₀ and Y ₁ . It is possible to make the content of the block-shaped condensing window group into a single divided spherical Fresnel lens by the way of division. The cover area of the sensor head (1) is
The first ceiling detector (3a) and the second ceiling detector (4a)
In each case, horizontal rotation direction X = 90 °, vertical rotation
The direction Y = 80 ° is standard, and the cover range angle depends on the design.
The degree can be increased. That is, the first ceiling detector (3a)
2A, the horizontal rotation direction X = 90 ° in FIG.
The direction Y around the vertical in (B) is 80 ° as a standard. Second
The ceiling detection unit (4a) is also the first ceiling detection unit in FIG.
The same horizontal rotation direction X = 90 ° as (3a),
The vertical rotation direction Y = 80 ° is standard. As described above, the first ceiling detecting section ( 3a ) and the second ceiling detecting section ( 4a ) are provided on the head (1) of the hot-wire detector for ceiling installation , and the respective detections are performed. Parts ( 3a), (4
a ) includes the far point light condensing section ( 5a), (5b) and the intermediate area.
Area light-collecting sections (6a) and (6b) and near-point area light-collecting sections ( 7
a), from which the shape forming the (7b), 2 types of deflection Ceiling
It is possible to reduce the cost compared to the conventional case of manufacturing two types of flannel lenses with one type of head and two types.
You. On the other hand, FIG. 2C shows a hot-wire type inspection for wall installation.
This is an embodiment of a dispenser, in this case, a heat ray transmitting cover (3).
To the first wall detector (3a) and the second wall detector (4a).
The first wall Fresnel lens group (2a) and the second wall
Place the lens group (2b) inside the heat ray permeable cover (3)
To be integrally molded. Hot wire type as shown in Fig. 2 (C)
Install the detector on the wall for the second wall of the heat ray transmission cover (3)
When the detection unit (4a) is used, the far point region
(5b) is the ceiling installation of FIG. 2 (A) in the horizontal direction
Covers X = about 80 ° as well as
As shown in FIG. 2 (C), Y ₀ = about 4 ° to 10 ° is covered.
Bar. A near point provided in the second wall detecting section (4a)
The area covered by the area light-collecting section (7b) is as shown in FIG.
As for well installation, the horizontal rotation direction corresponding to X is about 60 °
And Y _{1 in} the vertical direction in FIG. 2C is about 30 °.
is there. Further, a light collecting section in the middle area of the second wall detecting section (4a).
(6b) is composed of three condensing windows L arranged vertically in a strip shape.
It is a block-shaped condensing window. Intermediate area light-collecting section (6b)
Covers the far point light condensing sections (5
b) and the coverage of the near point light condensing section (7b).
That is, it is between Y ₀ and Y ₁ in FIG . Here, the first wall detecting section for wall installation
(3a) Near point light condensing section (7b), middle area light condensing section
The section (6b) and the far-point area light-collecting section (5b) are shown in FIG.
(A) For the first ceiling for ceiling installation described in (B)
This is the same as the detection unit (3a). Detection for the first wall when installing the wall
If you want to use the part (3a),
Heat ray detection element built in the first wall detection unit (3a) of (3)
Remove the heat ray permeable cover (3) so that it is in front of the
And replace the positions. As described above, the head of the hot-wire detector for wall installation is used.
(1) a first wall detecting section (3a) and a second wall detecting section
(4a), and the respective detection units (3a) and (4a)
The far-point area light-collecting sections (5a) and (5b) and the intermediate area area
The optical section (6a) (6b) and the near-point condensing section (7a),
Since (7b) is formed in the same or similar pattern,
We manufacture two types of Fresnel lens groups for walls with one type of head.
Cost is lower than in the case of two types
Can be reduced. The first detecting section (3a) and the second detecting section (3a)
The frame (4a) includes, for example, a frame for setting a surface alert pattern.
Fresnel lens to set flannel lens group and three-dimensional alert pattern
Fresnel lenses with different security patterns, such as
Whatever combination of lens groups
Can be provided. Also, in the detection units (3a) and (4a)
Of the far point area, the middle area, and the near point area
What kind of arrangement of the Fresnel lens
It may be something. FIG. 3 shows the condensing section shown in FIGS. 1 (A) and 1 (B).
The example of division | segmentation of the spherical Fresnel lens formed in each of the window L is shown. By making the concentric circular lens elements arc-shaped, the amount of undercut can be reduced, and the difference in light-collecting ability of the arc-shaped lens elements can be combined to adjust the cover area. An example in which a half-split type I which is cut out by an inner dividing line S passing through a minimum circle of a lens element. An example in which a vertical dividing line orthogonal to the center of the minimum circle with the inner dividing line and the four-divided type II notched by the inner dividing line is an example in which the lens element surface is undercut in two cutout directions. Will not have. Further, in the case of the free split type III, which is a rectangular cutout having _two outer partition lines S ₂ parallel to the inner partition line, there is no undercut in three directions. Utilizing the fact that the arc of the lens element included therein has a gentle curve, even if an undercut appears depending on the die cut, the size can be small, so there is no fear that the lens characteristics will be damaged by the die cut. The example of a semi-mold halves which move inward lane line S to the position of the quasi partition lines S ₁ beyond the smallest circle lens elements are also utilized. Each condensing window L formed integrally with the head (1)
From its position and the mold opening direction to select the appropriate parts people split spherical Fureneruren's with that type, FIG. 1 (A)
(B) The section condensing window L is integrally formed. As described above, according to the present invention, the heat ray transmission cover made of polyethylene or the like of the heat ray type detector is divided into a plurality of detection portions, and a plurality of Fresnel lens groups having different security patterns inside. Can be easily detected by integrally molding
It is now possible to change the alert pattern to match the alert area
You. Further easy assembling work and cost can be inexpensive, yet prevents dust accumulation that the groove of the window from the outside of the group Fresnel lens, maintain aesthetics not only invisible window. Since the Fresnel lens group is integrally formed inside the heat ray transmitting cover, and as a result, the Fresnel lens group is formed inside the heat ray transmitting cover, so that the burrs produced during molding do not appear outside, and the Fresnel lens group itself that is also a good-looking because it out to the outside.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view and a plan view of a detection head. FIG. 2 (A) is a horizontal direction of a detection direction, (B) is a vertical direction of a detection direction of a ceiling installation, and (C). Is an explanatory diagram showing the vertical direction of the detection orientation of the wall installation. FIG. 3 is a plan view showing an example of division of a spherical Fresnel lens. [Description of References] 1: Detection head 1a: Base 3a: First ceiling detection unit (or 1a wall detecting section) 4a: second ceiling detecting section (or 2nd wall detecting section) 5a, 5b: far point area light collecting section 7a, 7b: near point area light collecting section L: light collecting window

Continuation of front page    (72) Inventor Hiroshi Kamiya               246 Tsuruma, Machida City, Tokyo Ho Chiki Strain               Machida factory                (56) References JP-A-60-28124 (JP, A)                 JP-A-61-126434 (JP, A)                 European Patent Application 98521 (EP, A)

Claims (1)

(57) [Claims] Covers the heat ray detector built into the detector body
A substantially semispherical heat ray permeable cover, and the heat ray permeable cover
In addition, a hot-wire detector in which a Fresnel lens group including a plurality of Fresnel lenses for setting a security pattern is integrally formed on the inside, wherein the heat-ray detecting element changes a detection direction to a half of the heat-ray transmitting cover.
Built toward the oblique direction of the spherical surface, the heat ray transmission cover, the heat ray sensing element during the wall installation
First wall detector and second wall selectively positioned on front
For the first and second walls of the heat ray permeable cover.
In addition, the far-point area light-collecting section with different monitoring distances,
Of the warning pattern that forms the optical section and the near-point condensing section
A hot-wire detector comprising different Fresnel lens groups . 2. Covers the heat ray detector built into the detector body
A substantially semispherical heat ray permeable cover, and the heat ray permeable cover
More than one Fresnel lens to set the alert pattern
Hot-wire inspection with a Fresnel lens group integrally molded inside
An output unit, wherein the heat ray detection element changes a detection direction to a half of the heat ray transmission cover.
The heat ray transmitting cover is built in the oblique direction of the spherical surface, and the heat ray transmitting element covers the heat ray detecting element when installed on a ceiling.
First ceiling detector selectively positioned in front of
2 The first and second ceiling detectors of the heat ray permeable cover are divided into two ceiling detectors.
In the far point area where the monitoring distance is different
Warning patterns that form the light-collecting area and the near-point light-collecting area
Characterized by having different Fresnel lens groups
Wire detector.