JP3124590B2 - Detection area display device of light receiving type detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detection area display device used in a light receiving type detector such as an infrared type alarm device.

[0002]

2. Description of the Related Art As a security device, a light-receiving type detector which receives and outputs infrared rays or far-infrared rays emitted by a human body has become widespread. The infrared light or the like, which is an input signal to this type of detector, has high directivity, and it is necessary to accurately mount the light receiving portion of the detector toward the detection target. These detectors used as security devices are usually installed on the ceiling surface to monitor the indoor space. However, due to differences in the distance to the detection target and differences in ceiling height, the reference The angle of the light receiving axis with respect to the surface changes, and it is necessary to adjust the mounting angle of the detector accordingly.

[0003] To cope with such a demand, an apparatus for adjusting the light receiving axis of a light receiving type detector has been proposed in Japanese Patent Application Laid-Open No. 57-139938. As shown in Fig. 1, this arm has arms (11) (1) suspended from both ends of a mounting base (1) mounted on the ceiling.
According to 1), the detector (2) in which the light receiving element section and the output section are fixed in the casing is rotatably supported. Therefore, when the detector (2) is rotated while the mounting table (1) is mounted on the ceiling surface, the direction of the light receiving portion, that is, the light receiving axis (P) can be adjusted.

In this prior art, the rear part of the detector (2) is attached to the arms (11) and (11) to facilitate adjustment of the light receiving axis (P).
Arc-shaped curved part (21) centered on the supporting fulcrum by
A graph as shown in FIG. 2 is drawn on the curved surface portion (21), while a reference line indicator attached to the mounting base (1) is provided.
(12) is arranged close to the surface of the graph display unit.

In the above graph, the horizontal axis represents the longest detection distance L from the mounting position of the detector (2), and the light receiving axis (P) of the detector (2).
The height H from the ceiling surface corresponding to the height of the detection target (for example, a person) is a function of the longest detection distance L and the inclination angle θ (H = Ltan θ), where the inclination angle θ from the horizontal line is taken as the vertical axis. It is expressed as Since the height H varies depending on the ceiling height, the graph shows the function curve (h) for each of several types of the height H corresponding to the type of the ceiling height.
_{1 ~h 3)} is displayed. That is, the relationship between the longest detection distance L and the inclination angle θ is displayed graphically for each ceiling height. .

In this apparatus, when the posture of the detector (2) with respect to the mounting table (1) is adjusted, the relationship between the graph displayed on the curved surface (21) and the reference line display (12) changes. From the intersection of the reference line display (12) and the curve, the position up to the detection target can be determined. In other words, if the ceiling height is determined and the longest detection distance L from the detector (2) is determined,
From these values, the specific point of the specific function curve corresponding to this is determined, and when the mounting posture of the detector (2) is adjusted so that the specific point coincides with the reference line indicator (12), the detector ( 2)
Is directed to the detection target accurately located at the longest detection distance L.

However, in this conventional display device, the relationship between the longest detection distance L and the height H can be read at or after the adjustment of the light receiving axis (P), but the longest detection distance is detected from the detector (2). The middle detection area up to the point L cannot be read. This is because, in the related art, the point of the specific longest detection distance L determined by the height of the detection target is merely displayed on the graph.

As a result, in the above-mentioned conventional device, if a plurality of detectors (2) and (2) are installed to accurately monitor a room of a fixed size, the light receiving axis (P ) Skill is required to adjust the line. The present invention has been made in view of such a point, and has been made in consideration of the following problem.
The light receiving element is rotatably equipped, and by rotating the light receiving element, the mounting posture of the light receiving element with respect to the reference plane can be adjusted, and the display device displays the adjustment state. Detector (2)
It is an object of the present invention to be able to display an intermediate detection area from a distance L to the longest detection distance L.

[Invention of claim 1]

[0010]

[Technical Means] The technical means of the present invention for solving the above-mentioned problem is that "the horizontal axis is the horizontal distance from the installation position of the detector (2) and the vertical axis is the installation position of the detector (2). A coordinate plate (3) expressing the vertical section of the detection target space by the coordinates of the height from the display, and a display plate provided with a detection area display section (41) corresponding to the detection area from the installation position of the detector (2) And (4) are overlapped with each other so as to be relatively rotatable, and the coordinate plate (3)
Alternatively, the display plate (4) is made of a transparent body so that the coordinates and the detection area display unit (41) can be both visually observed, and the relative rotation fulcrum is defined as the origin (30) of the coordinates on the coordinate plate (3) and the coordinate system. Rotation for adjusting the light receiving axis (P) of the light receiving element part of the detector (2), and the coordinate plate (3) and the display plate (4) are made to coincide with the starting point (42) of the detection area display part (41). ), And the detection area display section (41) is overlapped with the reference position of the coordinates of the coordinate plate (3) when the light receiving element section is set in the reference posture. is there.

[0011]

The above technical means operates as follows. Detector
The adjustment of the light receiving axis (P) of the light receiving element portion in (2) is performed by adjusting the attitude with respect to the mounting table (1), that is, the attitude with respect to the reference plane by rotating the light receiving element portion in the same manner as the conventional one. When the light receiving element is rotated, the coordinate plate (3)
And the display plate (4) are relatively rotated, so that when the light receiving element is set in the reference posture, the detection area display (41) moves to the reference position of the coordinates of the coordinate plate (3). Because they are overlapped, the origin (30) and the starting point on the coordinates of the coordinate plate (3)
While the position (42) is maintained at the fixed position, the posture of the detection area display unit (41) changes at a fixed rate from the reference position in accordance with the rotation angle of the light receiving element unit from the reference position. In other words, the direction change of the light receiving axis (P) in the detection target space due to the rotation of the light receiving element unit and the detection area display unit in the coordinates of the coordinate plate (3)
The direction change of (41) matches.

If the longest detection distance L in the detection target space and the height from the installation portion of the light receiving element to the detection target point are known before mounting the detector (2), the coordinate plate
The position corresponding to each of the above-mentioned values in the coordinates of (3) is adjusted by rotating the light receiving element so that the center line of the detection area display section (41) passes through the point with respect to the mounting table (1). vessel
If (2) is installed in a predetermined position, its mounting posture will be appropriate.

By making the coordinate plate (3) or the display plate (4) transparent so that both the coordinates and the detection area display portion (41) can be viewed, the attitude of the light receiving element portion can be changed as described above. When adjusted, the actual detection area is displayed by the detection area display section (41) from the starting point (42) to the longest detection distance L on the coordinates of the coordinate plate (3) modeling the cross section of the detection target space. Therefore, it can be read which part of the detection target space can be detected by the intermediate area of the detection area display section (41).

[0014]

According to the present invention having the above configuration, the following specific effects are obtained. Since it is possible to read which part of the detection target space can be detected by the intermediate area of the detection area display part (41) by the detector (2), a plurality of detectors (2) and (2) can be installed to When monitoring, each detector (2) can be properly installed without skill.

In the display unit, the detection area display unit (41) is displayed on the coordinates of the coordinate plate (3) which models the cross section of the detection target space, so that the actual detection area display unit (41) in the detection target space is displayed. The position of 41) is easy to guess. From this, the accuracy of the installation of each detector (2) is further improved. [Invention of Claim 2] The present invention provides a detector (2) having a light-receiving element portion of a type having a plurality of light-receiving axes (P) and (P). It is intended to be able to be displayed together.

The means employed for this purpose is described as "a light receiving element section is provided with a plurality of light receiving axes (P), (P),
The detection area display section (41) corresponding to (P) is provided on the display board (4). " In this case, each of the detection area display sections (41) corresponding to each light receiving axis (P) is displayed on the coordinates of the coordinate plate (3), so that the display area can be read in a wider range.

[0017]

Next, the embodiment of the present invention will be described with reference to FIG.
This will be described in detail with reference to the drawings. The embodiment shown in the drawings is shown in FIGS.
As shown in Fig. 4, the base (2a) and the cover (2b) of the detector (2)
The output device is built in a casing made of
The optical element unit is supported rotatably with respect to the base (2a),
The base (2a) is detachably mounted on the mounting base (1).
With multiple (three) light receiving elements
(P₁) ~ (P _Three) With infrared detector (2)
It is. The light receiving element is a reflecting mirror equipped with a reflecting mirror (5).
The detection element (20) is attached to the frame (50),
Infrared or far-infrared rays input to the reflector (5)
This is a form of reflection input to the detection element (20).

The reflector frame (50) is provided with a detecting element (20).
A front plate (55) on which is mounted, a reflecting mirror (5) opposed thereto,
It is composed of side walls (56) (56) connecting these two side edges and a top plate (57) extending from the upper end of the reflector (5) to the front plate (55) side, and as a whole it becomes a light incident part The lower front part is an open box. In order to reflect the three light receiving axes (P), the reflecting mirror (5) is a first concave mirror that reflects the horizontal light receiving axis (P ₁ ) when the detector (2) is in the reference posture. Department
(51) and the light receiving axis (P
₂ ) The second concave mirror (52) and the third concave mirror (5) that reflect (P ₃ ).
3).

On the other hand, the mounting base (1) is a disk for mounting on the ceiling surface. An annular portion (13) projecting downward from the peripheral edge of the mounting base (1) is attached to the peripheral edge of the base (2a). Tube
(23) is fitted. Then, in order to detachably connect the peripheral cylindrical portion (23) and the annular portion (13), a known engaging mechanism (for example, a concave-convex engaging mechanism) is employed. The base (2a) has a disk shape as a whole, and the peripheral cylindrical portion (23) projects upward from the peripheral portion.A window (24) is opened in the center thereof, and a pair of bearings provided below the window (24) is provided. The plates (25) and (25) support a shaft portion (58) protruding from the side walls (56) and (56) of the reflector frame (50), whereby the entire reflector frame (50) is horizontal. It becomes rotatable around the shafts (58) extending in the direction.

In this mounted state, the reflector frame (50)
The top plate (57) faces the center of the base (2a) at a fixed distance, and a display plate for displaying the detection area is provided between the top plate (57) and the center of the base (2a). (4) and a coordinate plate (3). The coordinate plate (3) has a window in the base (2a).
(24) The base (2
It is supported and fixed substantially parallel to a), and the display board is
(4) is superimposed. The display board (4), as shown in FIG. 7, three detection area display unit that correspond to each other in three concave mirror portion (41 _a) ~ (41 _c) from the starting point (42) of the reflector (5) A fulcrum shaft (40) projecting from the lower surface of the base (2a) and passing through the coordinate plate (3) is provided at the starting point (42). Through the through hole. Therefore, the coordinate plate (3) can be rotated in a horizontal plane about the fulcrum shaft (40). Further, the detection area display unit detection area display section of (41) (41 _a) includes a light receiving axis
Corresponds to the detection area in the coordinate of the coordinate plate to be described later (3) when the (P) and a horizontal posture, the detection area (41 _b) (41 _c), the
At this time, it corresponds to the detection area up to the longest detection distance L of (P ₂ ) and (P ₃ ).

On the other hand, on the coordinate plate (3), coordinates modeling a longitudinal sectional view of a detection target space in which the detector (2) is installed are printed. As shown in FIG. 6, these coordinates are orthogonal coordinates with the ceiling surface at 0 point on the vertical axis and the installation position of the detector (2) at 0 point on the horizontal axis. The origin (30) of this coordinate is shown in FIG. The fulcrum shaft (40) penetrates as shown in FIGS. A slot (31) parallel to the vertical axis of the coordinates is formed at a position off the coordinates on the opposite side of the penetrating portion of the fulcrum axis (40), and as shown in FIG. A lever (R) protruding from the top plate (57) passes through the long hole (31) and engages with the engagement hole (4) of the display plate (4).
3) is engaged. The engagement hole (43) is a long hole facing the fulcrum shaft (40) in the display plate (4). Therefore, when the light receiving axis (P) is adjusted by rotating the reflector frame (50),
Display board according to the amount of movement of lever (R) that rotates together with this
(4) rotates. That is, the coordinate plate (3) and the display plate (4) rotate relatively. The lever (R) is the coordinate plate (3)
And the display (4) moves linearly in a horizontal plane, and the point of engagement between the display (4) and the lever (R) moves in the radial direction of rotation relative to the display (4). However, since the engagement hole (43) is a long hole facing the fulcrum shaft (40),
Due to the rotation of the lever (R), the display plate (4) smoothly rotates while maintaining the horizontal posture.

The window (24) is located right above the coordinate display section of the coordinate plate (3) and is set in a rectangular shape having the same size as the coordinate display section. Is made of a transparent material, so that from this window (24), as shown in FIG.
Through (4), the entire coordinate portion of the coordinate plate (3) can be visually checked, and the state where the detection area display portion (41) overlaps the coordinates of the coordinate plate (3) can be visually checked.

In this embodiment, the base (2a) has a cover
With (2b) set, the attitude of the reflector frame (50) can be adjusted. Therefore, near the window (24), as shown in FIGS. 3 and 4, an adjustment dial (59) having the side wall (56) extended upward is exposed. Therefore, when the adjusting dial portion (59) is operated, the angle of the reflecting mirror frame (50) integrated therewith, that is, the angle of the reflecting mirror (5) can be adjusted.

The reference attitude of the light receiving element in this embodiment is such that the light receiving axis (P ₁ ) to the first concave mirror (51) is oriented in the horizontal direction. At this time, the first concave mirror (51) Receiving axis to (P ₁ )
So that the detection area display section (41) corresponding to the horizontal axis extends from the origin (30) of the coordinates of the coordinate plate (3).
(4) The initial posture is set. Normally, the attitude of the light receiving element is adjusted so that the light receiving axis (P) line faces downward from this attitude, and thus the lever provided on the top plate (57) is adjusted.
(R) is configured to engage with the engagement hole (43) at the end of the long hole (31) on the origin (30) side in the reference posture.

The embodiment described above has a plurality of light receiving axes.
(P), but one detector axis (P)
Needless to say, the present invention can be applied to a detector (2) having The following changes can be made to each part of the above embodiment. . The origin (30) of the coordinates of the coordinate plate (3) is determined in relation to the installation location of the detector (2), and 0 points on the vertical and horizontal axes correspond to those of the detector (2). What is necessary is just to set according to installation conditions.

[0026] Changed the coordinate plate (3) to a transparent body by reversing the vertical relationship between the coordinate plate (3) and the display plate (4). . To change the relative rotation between the coordinate plate (3) and the display plate (4) and the interlocking relationship between the reflection mirror frame (50) and another known configuration. . Change the detector (2) to a method of receiving light directly to the detection element (20).

[0027] Other components may be changed to known or other known configurations.

[Brief description of the drawings]

FIG. 1 is a perspective view of a conventional example.

FIG. 2 is a detailed diagram showing the relationship between a reference line display (12) and a graph.

FIG. 3 is a sectional view of an embodiment of the present invention.

FIG. 4 is a sectional view taken along line XX.

FIG. 5 is a diagram showing the relationship between the coordinate plate (3) and the display plate (4).

FIG. 6 is a plan view of a coordinate plate (3).

FIG. 7 is a plan view of the display panel (4).

FIG. 8 is an explanatory diagram of a detection area display state.

[Explanation of symbols]

 (1) ・ ・ ・ Mounting stand (2) ・ ・ ・ Detector (3) ・ ・ ・ Coordinate plate (41) ・ ・ ・ Detection area display part (4) ・ ・ ・ Display plate (30) ・ ・ ・ Origin ( 42) ・ ・ ・ Starting point

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01J 1/02 G01J 1/06 G01V 8/12 G08B 13/19

Claims (2)

(57) [Claims] 1. A light receiving element portion of a detector (2) is rotatably mounted on a mounting base (1) installed on a reference surface, and the light receiving element portion is rotated to rotate the light receiving element portion on the reference surface. In a light receiving type detector equipped with a display device capable of adjusting the mounting position of the element portion and displaying the adjustment state, the horizontal axis is the horizontal distance from the installation position of the detector (2), and the vertical axis is the detector. A coordinate plate (3) expressing the vertical section of the detection target space by coordinates taken as the height from the installation position of (2), and a detector
A display plate (4) provided with a detection area display section (41) corresponding to a detection area from the installation position of (2) is superimposed relatively rotatably, and the coordinate plate (3) or the display plate ( 4) by making a transparent body, the coordinates and the detection area display section (41)
And make the relative rotation fulcrum a coordinate plate.
(3) The origin (30) of the coordinates in and the detection area display section
Rotation for adjusting the light receiving axis (P) of the light receiving element of the detector (2) and the relative movement between the coordinate plate (3) and the display plate (4) are made to coincide with the starting point (42) of (41). The detection area of the light-receiving type detector in which the detection area display section (41) is overlapped with the reference position of the coordinates of the coordinate plate (3) when the light-receiving element section is set in the reference posture in conjunction with the rotation. Display device. 2. A light-receiving element section having a plurality of light-receiving axes (P) and (P), and a detection area display section (41) corresponding to each light-receiving axis (P) is provided on a display plate (4). A detection area display device for a light receiving type detector according to claim 1.