JP5590931B2 - Illuminated surveillance camera device - Google Patents

Illuminated surveillance camera device Download PDF

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JP5590931B2
JP5590931B2 JP2010060651A JP2010060651A JP5590931B2 JP 5590931 B2 JP5590931 B2 JP 5590931B2 JP 2010060651 A JP2010060651 A JP 2010060651A JP 2010060651 A JP2010060651 A JP 2010060651A JP 5590931 B2 JP5590931 B2 JP 5590931B2
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light
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cover
light projecting
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JP2011199348A (en
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法夫 真狩
定征 根本
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Mitsubishi Electric Corp
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Description

この発明は、例えば、昼間などのように可視光で撮影可能な場合には可視光で撮影を行い、夜間などのように撮影に十分な光量が得られない場合には可視光以外の波長の照明に切替えて撮影を行う照明付き監視カメラ装置に関するものである。   In the present invention, for example, when visible light can be taken such as in the daytime, the visible light is taken, and when a sufficient amount of light cannot be obtained such as at night, a wavelength other than visible light can be obtained. The present invention relates to an illuminated surveillance camera apparatus that switches to illumination and performs shooting.

従来の照明付き監視カメラ装置では、透明または半透明のカバー内にカメラ及び投光手段を有している。カメラは昼間などのように可視光で撮影可能な場合には可視光で撮影を行い、夜間などのように撮影に十分な光量が得られない場合には、投光手段により可視光以外の波長(例えば、近赤外線)の光を照射することによって撮影を行う。このことにより、カメラ周辺が暗いとき、監視されている人物に気づかれることなく撮影することができる(例えば、特許文献1参照)。   A conventional surveillance camera device with illumination has a camera and a light projecting means in a transparent or translucent cover. When the camera can shoot with visible light, such as in the daytime, the camera shoots with visible light. Photographing is performed by irradiating light (for example, near infrared rays). Thus, when the periphery of the camera is dark, it is possible to take a picture without being noticed by the person being monitored (see, for example, Patent Document 1).

また、コールドミラーを有するミラーケースに赤外線発光装置と赤外線カメラが内蔵され、赤外線を透過して可視光をミラーとして反射するように構成した照明付き監視カメラ装置もある(例えば、特許文献2参照)。   In addition, there is an illuminated surveillance camera device in which an infrared light emitting device and an infrared camera are incorporated in a mirror case having a cold mirror and configured to transmit infrared light and reflect visible light as a mirror (see, for example, Patent Document 2). .

特開2005―136800号広報(第3頁、第図1)Japanese Laid-Open Patent Publication No. 2005-136800 (Page 3, Fig. 1) 特開2002―316580号広報(第2頁、第図1、図4)Japanese Laid-Open Patent Publication No. 2002-316580 (second page, FIGS. 1 and 4)

しかしながら、特許文献1に開示される従来の照明付き監視カメラ装置において、透明のドームカバーを使用した場合には、昼間など周囲が明るい場合には、監視されている人物がカメラを見ることができる。そのため、監視されている人物が不快に感じたり、犯罪を行おうとしている人物がカメラの存在に気づき、犯罪の瞬間を撮影できなくなる恐れがあるという課題があった。   However, in the conventional illuminated surveillance camera device disclosed in Patent Document 1, when a transparent dome cover is used, the person being monitored can see the camera when the surroundings are bright, such as in the daytime. . For this reason, there is a problem that the person being monitored feels uncomfortable, or the person who is trying to commit a crime notices the presence of the camera, making it impossible to take a picture of the crime.

また、特許文献2に開示される従来の照明付き監視カメラ装置のように、コールドミラーなどによるカバーを使用した場合には、カバー内のカメラは外部から見えなくなる。しかしながら、監視カメラのように天井など、鏡が通常配置されない場所に設置すると、かえって反射鏡が目立ち、監視されていることを気づきやすくなる恐れがあるという課題があった。また、コールドミラーは可視光を透過せず、赤外線を透過するだけなので、赤外線カメラのみの使用となり、昼間にカラー撮影ができないという課題があった。   In addition, when a cover such as a cold mirror is used as in the conventional surveillance camera device with illumination disclosed in Patent Document 2, the camera in the cover cannot be seen from the outside. However, when installed in a place where a mirror is not normally arranged, such as a ceiling like a surveillance camera, there is a problem that the reflecting mirror is conspicuous and it may be easy to notice that it is being monitored. Further, since the cold mirror does not transmit visible light but only transmits infrared light, only the infrared camera is used, and there is a problem that color photography cannot be performed in the daytime.

また、特許文献1,2に開示される従来の照明付き監視カメラ装置において、カメラが目立たなくなるようにカバーを半透明またはハーフミラーにすると、カメラは目立たなくなるが、内蔵している投光手段による光が透過する際に減光し、被写体が暗く見え、また、撮影可能な範囲が狭くなってしまうという課題がある。また、これを改善するためには、投光手段の大型化、消費電力の増大などが必要となるという課題があった。   Moreover, in the conventional surveillance camera device with illumination disclosed in Patent Documents 1 and 2, if the cover is made semitransparent or a half mirror so that the camera is inconspicuous, the camera becomes inconspicuous, but by the built-in light projecting means There is a problem that the light is reduced when the light is transmitted, the subject looks dark, and the photographing range is narrowed. Moreover, in order to improve this, there existed a subject that the enlargement of a light projection means, the increase in power consumption, etc. were needed.

この発明は、上記のような課題を解決するためになされたもので、カメラが目立たなくかつ投光手段による光が減光されることなく広い範囲を撮影することができる照明付き監視カメラ装置を提供することを目的としている。   The present invention has been made in order to solve the above-described problems, and provides a surveillance camera device with illumination that can shoot a wide range without making the camera conspicuous and without dimming light from the light projecting means. It is intended to provide.

この発明に係る照明付き監視カメラ装置は、可視光の波長以外の波長を有する光を照射する投光手段と、可視光及び投光手段により照射される光の波長領域に感度を持つ撮像手段と、可視光及び投光手段による照射光を透過し、可視光の透過率に対して投光手段による照射光の透過率が高い分光透過特性を有し、投光手段及び撮像手段を覆うカバーとを備えたものである。 An illuminated surveillance camera device according to the present invention includes a light projecting unit that irradiates light having a wavelength other than the wavelength of visible light, and an imaging unit having sensitivity in the wavelength region of visible light and the light irradiated by the light projecting unit; A cover that transmits the visible light and the light irradiated by the light projecting means, has a spectral transmission characteristic in which the transmittance of the light irradiated by the light projecting means is higher than the transmittance of the visible light, and covers the light projecting means and the imaging means; It is equipped with.

この発明によれば、上記のように構成したので、可視光の透過率に対して投光手段による照射光の透過率が高い分光透過特性を有するカバーを備えることで、カメラが目立たなく、夜間は投光手段による光がカバーにほとんど減光されることなく照射され、暗くなることを防止でき、広い範囲を撮影することができる。   According to the present invention, since it is configured as described above, the camera has an inconspicuous nighttime by providing a cover having a spectral transmission characteristic in which the transmittance of irradiation light by the light projecting means is higher than the transmittance of visible light. The light emitted from the light projecting means is irradiated to the cover almost without being dimmed and can be prevented from becoming dark, and a wide range can be photographed.

この発明の実施の形態1に係る照明付き監視カメラ装置の構造を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the surveillance camera apparatus with illumination which concerns on Embodiment 1 of this invention. この発明の実施の形態1におけるカメラ基板の感度特性を示すグラフである。It is a graph which shows the sensitivity characteristic of the camera substrate in Embodiment 1 of this invention. この発明の実施の形態1におけるドームカバーの分光透過率を示すグラフである。It is a graph which shows the spectral transmittance of the dome cover in Embodiment 1 of this invention. この発明の実施の形態2に係る照明付き監視カメラ装置の構造を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the surveillance camera apparatus with illumination which concerns on Embodiment 2 of this invention. この発明の実施の形態2におけるカバー部の内側を示す外観図である。It is an external view which shows the inner side of the cover part in Embodiment 2 of this invention. この発明の実施の形態2における光学系、投光手段及びカバーの配置を示す配置図である。It is an arrangement drawing showing arrangement of an optical system, light projection means, and a cover in Embodiment 2 of this invention.

以下、この発明の実施の形態について図面を参照しながら詳細に説明する。
実施の形態1.
図1はこの発明の実施の形態1に係る照明付き監視カメラ装置の構造を示す分解斜視図である。
照明付き監視カメラ装置は、図1に示すように、天井に設置されたベース1と、ベース1に取り付けられる本体2と、本体2を覆うようにベース1に取り付けられるカバー3とから構成される。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1 FIG.
1 is an exploded perspective view showing the structure of an illuminated surveillance camera apparatus according to Embodiment 1 of the present invention.
As shown in FIG. 1, the illuminated surveillance camera device includes a base 1 installed on a ceiling, a main body 2 attached to the base 1, and a cover 3 attached to the base 1 so as to cover the main body 2. .

本体2は、不図示の装置の電源、撮影された映像の処理部、外部との通信部、撮影装置の可動部などが実装されたものである。この本体2は、支持部4を介して、監視領域を撮像するカメラ部5を支持している。   The main body 2 is mounted with a power supply of a device (not shown), a captured video processing unit, an external communication unit, a movable unit of the imaging device, and the like. The main body 2 supports a camera unit 5 that captures an image of a monitoring area via a support unit 4.

支持部4は、軸4aを中心にカメラ部5を上下方向に回動自在に支持するとともに、自身が本体2により左右方向に回動されることによって、カメラ部5の撮像方向を調整するものである。   The support unit 4 supports the camera unit 5 so as to be pivotable in the vertical direction about the shaft 4a, and adjusts the imaging direction of the camera unit 5 by rotating itself by the main body 2 in the horizontal direction. It is.

カメラ部5は、監視領域を撮像するためのCCD(Charge Coupled Device)やCMOS(Complementary Metal-Oxide Semiconductor)などの撮像素子を有するカメラ基板(撮像手段)6と、カメラ基板6上に取り付けられたレンズを含む光学系7と、カメラ基板6上の周囲に配置され、カメラ基板6の撮像範囲に対して可視光以外の波長の光を照射するLED(Light Emitting Diode)からなる投光手段8とから構成される。   The camera unit 5 is attached on the camera substrate 6 and a camera substrate (imaging means) 6 having an imaging element such as a charge coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS) for imaging the monitoring area. An optical system 7 including a lens, and a light projecting unit 8 that is disposed around the camera substrate 6 and that irradiates light of a wavelength other than visible light to the imaging range of the camera substrate 6. Consists of

図2はこの発明の実施の形態1におけるカメラ基板6の一般的な感度特性を示すグラフである。
図2に示すように、カメラ基板6では、可視光以外にも近紫外線20及び近赤外線領域21にも感度を持っており、投光手段8によりこれらの波長領域の光を照射することによって撮像することが可能となる。このため、投光手段8として、例えば近赤外線照明を用いてもよい。
FIG. 2 is a graph showing general sensitivity characteristics of the camera substrate 6 according to Embodiment 1 of the present invention.
As shown in FIG. 2, the camera substrate 6 has sensitivity not only to visible light but also to the near-ultraviolet rays 20 and the near-infrared region 21, and imaging is performed by irradiating light in these wavelength regions by the light projecting means 8. It becomes possible to do. For this reason, for example, near-infrared illumination may be used as the light projecting means 8.

カバー3は、撮影されている人物に気づかれないように半透明部材からなるドームカバー9と、硬質の部材からなる筐体10とから構成される。このカバー3は、本体2及びカメラ部5を覆い、筐体10をベース1に取り付けて固定することによって、内部構造を、塵埃、カビ、昆虫などの外部の干渉要因から保護する。   The cover 3 includes a dome cover 9 made of a translucent member and a housing 10 made of a hard member so that a person being photographed is not noticed. The cover 3 covers the main body 2 and the camera unit 5 and attaches and fixes the housing 10 to the base 1 to protect the internal structure from external interference factors such as dust, mold and insects.

ここで、ドームカバー9の分光透過率について説明する。
図3はこの発明の実施の形態1におけるドームカバー9の分光透過率の特性例を示すグラフである。なお、図3では、投光手段8により近赤外線光が照射された場合を示している。
図3に示すように、ドームカバー9では、可視光領域(およそ400nm〜700nm)22の透過率がおよそ50%(半透明)、近赤外線領域(およそ700nm〜1000nm)23の透過率がおよそ90%(透明)となるような材料を選択して構成する。
なお、ドームカバー9はこのような特性を有するよう調色した樹脂材料にて成形する以外にも、上記波長領域全てを透過する材料からなるドームカバーに可視光のみを減光するフィルタを塗布、蒸着など行うことにより構成してもよい。
Here, the spectral transmittance of the dome cover 9 will be described.
FIG. 3 is a graph showing an example of spectral transmittance characteristics of the dome cover 9 according to Embodiment 1 of the present invention. FIG. 3 shows a case where near-infrared light is irradiated by the light projecting means 8.
As shown in FIG. 3, in the dome cover 9, the transmittance in the visible light region (approximately 400 nm to 700 nm) 22 is approximately 50% (translucent), and the transmittance in the near infrared region (approximately 700 nm to 1000 nm) 23 is approximately 90%. % Material (transparent) is selected and configured.
In addition to molding the dome cover 9 with a resin material that has been color-tuned to have such characteristics, a filter that reduces only visible light is applied to the dome cover that is made of a material that transmits all of the wavelength region. You may comprise by performing vapor deposition.

以上のように、この実施の形態1によれば、ドームカバー9を、可視光の波長領域ではカメラが目立たなくなる程度に透過率を下げ、投光手段8により照射される波長領域では透過率を上げるように構成したので、昼間に監視されている人物にカメラが目立たないようにドームカバー9を半透明にしているにも関わらず、夜間のような日光が入らず、投光手段8による光のみによって撮影する場合にも光が減光されずに照射されるため、明るさが不足して撮影範囲が狭くなったり、撮影した人物が見難くなることで十分な監視ができなくなることを防ぐことができる。また、投光手段8による光の明るさが向上することにともなって、機器の大型化、消費電力の増大を防ぐことができる。   As described above, according to the first embodiment, the transmittance of the dome cover 9 is lowered so that the camera becomes inconspicuous in the visible light wavelength region, and the transmittance is reduced in the wavelength region irradiated by the light projecting means 8. Since the dome cover 9 is made semi-transparent so that the camera is not conspicuous for a person who is monitored in the daytime, no sunlight enters at night, and the light emitted by the light projecting means 8 is used. Even when shooting with only the light, the light is emitted without being dimmed, so that the brightness is insufficient and the shooting range is narrowed, or it is difficult to see the person who shot the camera, making it impossible to monitor sufficiently be able to. Further, as the brightness of light by the light projecting means 8 is improved, it is possible to prevent an increase in the size of the device and an increase in power consumption.

なお、実施の形態1における投光手段8では、LEDにより構成される場合について示したが、これに限るものではなく、蛍光灯、電球などにより構成しても良く、投光手段8の種類は限定されるものではない。   In addition, although the case where the light projecting unit 8 in the first embodiment is configured by the LED has been described, the present invention is not limited thereto, and the light projecting unit 8 may be configured by a fluorescent lamp, a light bulb, and the like. It is not limited.

また、実施の形態1におけるカバー3では、ドームカバー9と筐体10とを別体に構成したが、このドームカバー9と筐体10を一体成形してもよく、筐体10に対応する部分だけを塗装するように構成してもよい。   Further, in the cover 3 in the first embodiment, the dome cover 9 and the housing 10 are configured separately, but the dome cover 9 and the housing 10 may be integrally formed, and a portion corresponding to the housing 10 It may be configured to paint only.

実施の形態2.
図4はこの発明の実施の形態2に係る照明付き監視カメラ装置を示す分解斜視図である。
なお、図4に示す実施の形態2に係る照明付き監視カメラ装置において、図1に示す実施の形態1に係る照明付き監視カメラ装置と同様の構成については同一の符号を付し、その説明を省略する。
照明付き監視カメラ装置は、図4に示すように、ベース11、本体2及びカバー12から構成される。
ベース11は、天井に設置されるものであり、本体2が左右方向に回動して位置決めを行うための長穴部11aが形成されている。
Embodiment 2. FIG.
4 is an exploded perspective view showing an illuminated surveillance camera apparatus according to Embodiment 2 of the present invention.
In the illuminated surveillance camera apparatus according to the second embodiment shown in FIG. 4, the same components as those in the illuminated surveillance camera apparatus according to the first embodiment shown in FIG. Omitted.
As shown in FIG. 4, the illuminated surveillance camera device includes a base 11, a main body 2, and a cover 12.
The base 11 is installed on the ceiling, and has a long hole portion 11a for positioning the main body 2 by rotating in the left-right direction.

本体2は、長穴部11aにより所望の向きに設置して、ネジ等により締結することによってベース11に保持される。この本体2は、支持部13を介して、監視領域を撮像するカメラ部14を支持している。
この支持部13は、支持部13の軸13aを中心にカメラ部14を上下方向に回動自在に支持することによって、カメラ部14の撮像方向を調整するものである。
The main body 2 is held in the base 11 by being installed in a desired direction by the long hole portion 11a and fastened with screws or the like. The main body 2 supports a camera unit 14 that captures an image of a monitoring area via a support unit 13.
The support unit 13 adjusts the imaging direction of the camera unit 14 by supporting the camera unit 14 so as to be rotatable in the vertical direction about the shaft 13 a of the support unit 13.

カメラ部14は、カメラ基板6、レンズを含む光学系7及びレンズの左右に設けられた投光手段8に加えて、光学系7の一部品であるクッション15から構成される。
クッション15は、レンズの周囲に配置され、カバー12と密着することで、投光手段8による光がカバー12に反射してレンズに入り込むことを防ぐものである。
The camera unit 14 includes a camera substrate 6, an optical system 7 including a lens, and a light projecting unit 8 provided on the left and right of the lens, and a cushion 15 that is a component of the optical system 7.
The cushion 15 is disposed around the lens and is in close contact with the cover 12 to prevent light from the light projecting means 8 from being reflected by the cover 12 and entering the lens.

カバー12は、撮影されている人物に気づかれないような半透明の硬質部材からなる前面カバー16と、硬質部材からなる筐体17とから構成される。このカバー12は、本体2及びカメラ部14を覆い、筐体17をベース11に取り付けて固定することによって、内部構造を、塵埃、カビ、昆虫などの外部の干渉要因から保護する。   The cover 12 includes a front cover 16 made of a translucent hard member that cannot be noticed by a person being photographed, and a housing 17 made of a hard member. The cover 12 covers the main body 2 and the camera unit 14 and attaches and fixes the housing 17 to the base 11 to protect the internal structure from external interference factors such as dust, mold, and insects.

また、前面カバー16は、図5,6に示すように、クッション15が回動する部分(カメラ基板6の撮像面側)が肉厚に構成された肉厚部18と、投光手段8による光が通過する部分(投光手段8の照射面側)が、肉厚部18に対して肉薄に構成された肉薄部19とから構成されている。   As shown in FIGS. 5 and 6, the front cover 16 includes a thick portion 18 in which a portion where the cushion 15 rotates (the imaging surface side of the camera substrate 6) is formed thick, and a light projecting unit 8. A portion through which light passes (irradiation surface side of the light projecting means 8) is composed of a thin portion 19 configured to be thinner than the thick portion 18.

以上のように、この実施の形態2によれば、前面カバー16の、カメラ基板6による撮像面側を肉厚すなわち透過率を低くし、投光手段8による照射面側を肉薄すなわち透過率を高くするように構成したので、監視されている人物は撮影されていることに気づかない。また、投光手段8による光が前面カバー16により減光されることを低減できるため、明るさが不足して撮影範囲が狭くなったり、撮影した人物が見難くなることで十分な監視ができなることを防ぐことができる。また、投光手段8による光の明るさが向上することにともなって、機器の大型化、消費電力の増大を防ぐことができる。   As described above, according to the second embodiment, the thickness of the imaging surface side of the front cover 16 by the camera substrate 6, that is, the transmittance is reduced, and the irradiation surface side by the light projecting means 8 is reduced in thickness, that is, the transmittance. Since it is configured to be high, the person being monitored does not notice that it is being filmed. Further, since it is possible to reduce the light from the light projecting means 8 from being dimmed by the front cover 16, it is possible to perform sufficient monitoring because the brightness is insufficient and the photographing range becomes narrow, or the photographed person becomes difficult to see. Can be prevented. Further, as the brightness of light by the light projecting means 8 is improved, it is possible to prevent an increase in the size of the device and an increase in power consumption.

1 ベース、2 本体、3 カバー、4 支持部、4a 軸、5 カメラ部、6 カメラ基板(撮像手段)、7 光学系、8 投光手段、9 ドームカバー、10 筐体、11 ベース、11a 長穴部、12 カバー、13 支持部、13a 軸、14 カメラ部、15 クッション、16 前面カバー、17 筐体、18 肉厚部、19 肉薄部。   DESCRIPTION OF SYMBOLS 1 Base, 2 main body, 3 cover, 4 support part, 4a axis | shaft, 5 camera part, 6 camera board (imaging means), 7 optical system, 8 light projection means, 9 dome cover, 10 housing | casing, 11 base, 11a length Hole part, 12 cover, 13 support part, 13a shaft, 14 camera part, 15 cushion, 16 front cover, 17 housing, 18 thick part, 19 thin part.

Claims (2)

可視光の波長以外の波長を有する光を照射する投光手段と、
前記可視光及び前記投光手段により照射される光の波長領域に感度を持つ撮像手段と、
前記可視光及び前記投光手段による照射光を透過し、前記可視光の透過率に対して前記投光手段による照射光の透過率が高い分光透過特性を有し、前記投光手段及び前記撮像手段を覆うカバーと
を備えた照明付き監視カメラ装置。
A light projecting means for irradiating light having a wavelength other than that of visible light;
Imaging means having sensitivity in the wavelength region of the light irradiated by the visible light and the light projecting means;
Transmitting the visible light and the light irradiated by the light projecting means, and having a spectral transmission characteristic in which the transmittance of the light irradiated by the light projecting means is higher than the transmittance of the visible light, the light projecting means and the imaging An illuminated surveillance camera device comprising a cover covering the means.
可視光の波長以外の波長を有する光を照射する投光手段と、
前記可視光及び前記投光手段により照射される光の波長領域に感度を持つ撮像手段と、
前記撮像手段の撮像面側に対して前記投光手段の照射面側が肉薄に形成され、前記投光手段及び前記撮像手段を覆うカバーと
を備えた照明付き監視カメラ装置。
A light projecting means for irradiating light having a wavelength other than that of visible light;
Imaging means having sensitivity in the wavelength region of the light irradiated by the visible light and the light projecting means;
An illuminated surveillance camera device comprising: an irradiation surface side of the light projecting unit that is thinner than an image capturing surface side of the image capturing unit; and a cover that covers the light projecting unit and the image capturing unit.
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