JP4228798B2 - Stepping stone walking detector - Google Patents

Stepping stone walking detector Download PDF

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Publication number
JP4228798B2
JP4228798B2 JP2003181179A JP2003181179A JP4228798B2 JP 4228798 B2 JP4228798 B2 JP 4228798B2 JP 2003181179 A JP2003181179 A JP 2003181179A JP 2003181179 A JP2003181179 A JP 2003181179A JP 4228798 B2 JP4228798 B2 JP 4228798B2
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Japan
Prior art keywords
light
stepping stone
unit
light receiving
reflected
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JP2003181179A
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Japanese (ja)
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JP2005018342A (en
Inventor
真治 足立
敏裕 田中
昌幸 橋本
良泰 伊藤
達司 大野
大樹 松崎
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Panasonic Corp
Panasonic Electric Works Co Ltd
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Panasonic Corp
Matsushita Electric Works Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、防犯機能を備えた踏み石に関するものである。
【0002】
【従来の技術】
従来から種々の防犯装置が提案されている。例えば、外装材の中に長い検知線を架設し、検知線に正弦波電圧を印加してその周囲に検知エリアとしての電界を発生させて、検知線の検知エリアに何らかの侵入物体が浸入してくると静電容量が変化して誘起電圧が検知線に生じ、これを検知信号として侵入物体の種類を推定するようにしたものが知られている。(例えば、特許文献1参照)
ところで、侵入犯が庭などから窓や出入り口に向かって歩いて侵入する際、必ずしも壁に沿って歩いて来るとはかぎらず、上記の特許文献1に示されたもののように建物の外装材の中に検知線を架設する従来例においては、窓や出入り口へ向かう侵入犯が壁に沿って侵入しない場合には侵入を検知できない。
【0003】
また、建物の外又は内にTVカメラや赤外線カメラを設置し、該TVカメラや赤外線カメラを通して監視領域に侵入した人間や動物を監視し、侵入物体の移動体領域を追跡し、高さ、幅、面積などの特徴の時系列データから歩行のリズムを抽出して該リズムに基づいて人間か動物かを判定するようにしたものも知られている。(例えば、特許文献2参照)
この特許文献2に示された従来例にあっては、敷地内にTVカメラや赤外線カメラを配置するため、外観上好ましくなく、また、TVカメラや赤外線カメラを侵入犯に認知され易いという問題がある。
【0004】
また、敷物に押下圧力を検出する押下圧力検出手段を設け、押下圧力を検出して警報あるいは監視装置を動作させるようにした盗難防止用警報装置も知られている(例えば、特許文献3参照)
ところが、この特許文献3に示されたものは圧力を検出する接触検知であるため、押下圧力検出手段に静荷重/衝撃荷重等の機械的過剰ストレスを受け、長期信頼性に問題がある。
【0005】
ところで、侵入犯は庭に踏み石を設置してある場合、踏み石上を歩いて出入り口や窓に向けて侵入するという特性がある。すなわち、庭土などに足跡を残すことを恐れ且つ履物の裏に庭土を付着させたくないため出入り口や窓に向けて配置してある踏み石上を歩行したがるものであり、また、庭に砂利が敷き詰めてある場合においても足音の発生を恐れて出入り口や窓に向けて配置してある踏み石上を歩行したがるという特性を有している。ところが、従来の踏み石には防犯機能はなく、侵入犯は踏み石を歩いて容易に建物の出入り口や窓まで侵入することができていた。しかしながら、近年の侵入窃盗犯罪の凶悪化に伴い、庭を通って建物の出入り口や窓に侵入する前に確実に侵入犯の侵入を検知することが強く望まれているのが現状である。
【0006】
【特許文献1】
特開平9−237390号公報
【特許文献2】
特開平7−50825号公報
【特許文献3】
特開昭53−87697号公報
【0007】
【発明が解決しようとする課題】
本発明は上記の点に鑑みてなされたものであり、庭から建物の出入り口や窓に侵入犯が侵入する経路上に存在する踏み石に侵入犯の検出機能を持たせ、庭を通って建物の出入り口や窓に侵入する前に確実に侵入犯の侵入を検知することができ、また、犬や猫等の小動物と侵入犯とを区別して正確に侵入犯の侵入を検知することができ、また、検知手段が検知物体と非接触であるため長期間安定した検知ができる踏み石の歩行検知装置を提供することを課題とするものである。
【0008】
【課題を解決するための手段】
上記課題を解決するために本発明に係る踏み石の歩行検知装置は、踏み石ブロック1の上面部に縦方向、横方向に等間隔で複数の透過部2を枡目状に設け、各透過部2の下方に、それぞれ透過部2を通して投光する投光部3と投光した光が踏み石ブロック1上方に位置する物体に反射した反射光を受光するための受光部4とを備えたセンシング部5を設け、受光が確認された受光部4の数、位置により受光領域を求めて、該センシング部5で受光した受光領域情報に基づいて反射光が反射した物体が人体か否かを判定する判定部6を備えて成ることを特徴とするものである。ここで、踏み石ブロック1内に信号処理部8を設け、この信号処理部8にセンシング部5で受光した受光情報に基づいて受光マッピングを作成するためのマッピング部9と、該マッピング部9により作成された受光マッピング情報に基づいて受光領域を判定して人体か否かを判定する判定部6とを備えることが好ましい。
【0009】
このような構成とすることで、縦方向、横方向に等間隔で枡目状に設けた複数の透過部2のうち反射光を受光した受光部4の数及び反射光を受光した受光部4の位置情報により求められる受光領域情報に基づいて踏み石ブロック1上方に位置する物体が人体(つまり人間の足)か否かを判定部6により判定でき、これにより踏み石ブロック1を歩行して建物の出入り口や窓に向かって侵入する侵入犯が出入り口や窓に侵入する前に犬や猫等の小動物と間違うことなく確実に検知できるものである。また、検知手段を構成するセンシング部5が被検知物体と被接触であるので、センシング部5に静荷重/衝撃荷重等の機械的過剰ストレスを受けることがなくて長期信頼性が向上するものである。また、踏み石ブロック1に上記のように侵入犯の検知機能を持たせることで、防犯カメラ等が敷地内に露出するものに比べて外観がよいものであり、庭における防犯として外観上違和感がないものである。
【0014】
【発明の実施の形態】
以下、本発明を添付図面に示す実施形態に基づいて説明する。
【0015】
踏み石20は庭に設置されるもので、踏み石20の主体を構成する踏み石ブロック1に歩行検知装置を備えることで踏み石20を構成してある。
【0016】
踏み石ブロック1は図2に示すように内部が収納部7となった箱体により形成してあり、天然石のような外観をしており、例えば、天然石をくり貫いて内部を中空にしたものや、人造石や、金属あるいはプラスチック製で内部に収納部7を有し且つ外面に天然石や人造石を貼り付けたもの等で構成してあるが、もちろんこれにのみ限定されるものではない。
【0017】
歩行検知装置は後述の透過部2、センシング部5、信号処理部8等により構成してある。
【0018】
踏み石ブロック1の上面部には複数の透過部2が設けてある。ここで、複数の透過部2は図1に示すように踏み石ブロック1の上面部に縦方向、横方向に等間隔で桝目状に配置してある。
【0019】
踏み石ブロック1の上面部に複数の透過部2を縦方向、横方向に等間隔で桝目状に形成するに当たって、図1において人の足裏の大きさをA(人の足裏の長手方向の長さをA1、幅方向の長さをA2)とすると共に犬や猫等の小動物の足裏の大きさをB(小動物の足裏は略円形をしているので径寸法をB1)とした場合、縦方向、横方向においていずれも隣接する透過部2のピッチをLとし、隣接する透過部2間の間隔の長さをMとすると、A1>A2>L>M>B1という関係となっており、人が踏み石20の上を歩行すると、その歩行方向や位置が違っても大きさAの人の足裏が図1のように複数の透過部2の真上に位置することになるが、小動物が踏み石20の上を歩行すると、大きさBの小動物の足裏が図1のように透過部2の真上に位置したとしても1箇所しか位置しないようになっている。
【0020】
この透過部2は近赤外線を透過する材質にて形成してある。ここで、近赤外線は通すが可視光は通さない材料で透過部2形成すると、踏み石ブロック1内部が見えず外観が好ましいものとなる。踏み石ブロック1内には複数の透過部2の下方にそれぞれ透過部2を通して上方に投光する投光部3と、投光した光が踏み石ブロック1上方に位置する物体に反射した反射光を受光するための受光部4とを備えたセンシング部5が設けてある。上記投光部3は近赤外線発光ダイオードにより構成してあって近赤外線を投光するようになっており、受光部4は近赤外線の受光が可能なフォトトランジスタ、フォトダイオード等により構成してある。
【0021】
踏み石ブロック1内には信号処理部8が設けてあり、この信号処理部8には図3のブロック図に示すように、センシング部5で受光した受光情報に基づいて受光マッピングを作成するためのマッピング部9と、該マッピング部9により作成された受光マッピング情報に基づいて人体か否かを判定する判定部6とを備えている。
【0022】
マッピング部9では各センシング部5で受光した受光情報に基いて受光マッピングを作成する。つまり、図4のフローチャートに示すように、複数の透過部2に対応した複数のセンシング部5の投光部3から同時もしくは時分割的に近赤外線を発光させ、複数の透過部2の上方に物体がある場合には対応する透過部2を通って投光した近赤外線が上方の物体に反射して受光部4で受光される。受光部4に受光の検知信号が入力されると、この検知信号がマップ情報として桝目状に配置したセンシング部5の配置に応じた桝目状のマップに書き込まれ、更にマップ情報のグルーピングが行われる。このように受光が確認された受光部4の数や位置により受光領域を求めて受光マッピングを作成するのである。ここで、複数の投光部3から時分割的に発光する場合には全ての投光部3の発光終了に要する時間以上の規定時間内における受光に基いて受光マッピングを作成する。
【0023】
判定部6では上記受光マッピング情報に基いて受光領域の大きさを判定し(つまり受光部4により受光が確認されたセンシング部5の集合である検知群の大きさを判定し)、人体か、犬や猫等の小動物であるかを判定するようになっている。図1のように、踏み石20の上面を人が歩行すると、その向きや足裏を載せた位置にかかわらず、人の足裏の場合は受光箇所数が複数箇所でその受光領域も人の足裏に特徴的な大きさとなるので、受光箇所が設定された複数箇所(人間の足跡に対する透過部2の寸法、数量により決定)の場合には、人間の歩行との判定をするのである。
【0024】
また、図3のブロック図に示すように、踏み石ブロック1にはブザーや発光手段等の報知部10、あるいは踏み石ブロック1の外に設けた外部報知部(例えば建物内部に設けた外部報知部)への外部通信部11を内装してあり、図4のフローチャートに示すように、判定部6により人体であると判定されると、報知部10に信号を出して警報を行ったり、あるいは、外部通信部11に信号を出して外部報知部に通報し、外部報知部で警報を行ったりするようになっている。
【0025】
判定部6における「人(人体)」であるとの判断は、ノイズの除去を目的として一定時間「人(人体)」検出状態が継続することを上記報知部10や外部報知部における警報発信の条件とする。
【0026】
この場合、マッピング情報の遷移(例えは、右下から左上に足跡が移動する)があったときも「人(人体)」検出状態が続いているものとみなす。
【0027】
また、複数箇所同時に「人(人体)」が検出されたときも両足が置かれていると考える。
【0028】
また、長期間同じ受光部4で受光し続けて検知状態が続いた場合は、判定部6でごみなどの障害物が踏み石ブロック1の上面に載置してあると判定して、警報部10に信号を出して警報を行ったり、あるいは、外部通信部11に信号を出して外部報知部に通報し、外部報知部で警報を行って家人に注意を喚起するようになっている。
【0029】
ところで、物体が踏み石ブロック1の上面(つまり踏み石20の上面)よりも所定高さ(例えば5cm)を越える位置にある場合には受光部4で受光される反射光が無効となるように設定してある。すなわち、踏み石ブロック1の上面よりも所定高さ以下に物体が位置して該所定高さ以下に位置する物体に反射した反射光を受光部4で受光した場合にのみ受光部4で受光した反射光の入力信号を有効として該受光信号によりマッピング部9で受光マッピングを作成するようになっている。
【0030】
仮に、物体が踏み石ブロック1上面よりも所定高さを越える位置にある場合における該物体で反射された反射光を受光部4で受光したものを有効とすると以下のような問題がある。例えば、踏み石20上を犬や猫等の小動物が歩行する際、透過部2の上方に小動物の腹部が位置する場合、投光部3から発光した近赤外線が犬や猫等の小動物の腹部に反射して受光部4で受光され、この受光信号を有効とすると、受光箇所数が複数箇所となって受光領域も大きくなり、人の足と誤って判定してしまうおそれがある。そこで、このようなことを防止するために、物体が踏み石ブロック1上面よりも所定高さを越える位置にある場合には受光部4で受光される反射光が無効となるように設定してある。これにより、踏み石20上面(つまり踏み石ブロック1上面)を犬や猫等の小動物が歩いても、犬や猫等の小動物の足に反射した反射光は有効にし犬や猫等の小動物の腹部に反射した反射光を無効にし、正確に犬や猫等の小動物の足を検出し、人間の足と異なる受光領域であるため正確に人間の足と犬や猫等の小動物の足とを識別して人体であるか否かを判定することができるものである。
【0031】
しかして、本発明においては、庭に設置される踏み石20上を人が歩行すると、反射光を受光した受光部4の数及び反射光を受光した受光部4の位置情報により求められる受光領域情報に基づいて踏み石20上方に位置する物体が人体(つまり人間の足)か否かを判定部6により判定できるものであり、これにより一列に並べた踏み石20を歩行して建物の出入り口や窓に向かって侵入する侵入犯を犬や猫等の小動物と間違うことなく確実に検知できるものである。特に、庭に設置される踏み石20は建物の出入り口や掃き出し窓に向かって複数個一列に設置されるものであり、また、既に述べたように、侵入窃盗犯は庭から建物内に侵入する際、庭土に足跡を残すことを恐れ且つ履物の裏に庭土を付着させるのを恐れ、また、庭に砂利が敷き詰めてある場合においても足音の発生を恐れるものであって、これらの理由のより建物の出入り口や掃き出し窓のような窓に向けて配置してある踏み石20上を歩行したがるという特性を有しており、したがって、この特性を利用して踏み石20を侵入犯が歩行するのを検知できることで、建物の出入り口や掃き出し窓のような窓に侵入犯が到達する前に侵入犯の侵入を検知して警報動作等を行うことができ、防犯効果が向上するものである。
【0032】
【発明の効果】
上記のように本発明の請求項1記載の発明にあっては、縦方向、横方向に等間隔で複数枡目状に設けた複数の透過部のうち、反射光を受光した受光部の数及び反射光を受光した受光部の位置情報により求められる受光領域情報に基づいて踏み石ブロック上方に位置する物体が人体か否かを判定部により判定でき、これにより踏み石ブロックを歩行して建物の出入り口や窓に向かって侵入する侵入犯を出入り口や窓に侵入する前に犬や猫等の小動物と間違うことなく確実に検知できるものであり、また、センシング部に対して非接触で検知できるのでセンシング部に静荷重/衝撃荷重等の機械的過剰ストレスを受けることがなくて長期信頼性が向上し、また、踏み石ブロックに侵入犯の検知機能を持たせることで、防犯カメラ等が敷地内に露出するものに比べて外観がよくて庭における防犯として外観上違和感がないものである。
【図面の簡単な説明】
【図1】本発明の踏み石の平面図である。
【図2】同上の図1のX−X線の断面図である。
【図3】同上の制御ブロック図である。
【図4】同上のフロー図である。
【符号の説明】
1 踏み石ブロック
2 透過部
3 投光部
4 受光部
5 センシング部
6 判定部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stepping stone having a crime prevention function.
[0002]
[Prior art]
Conventionally, various security devices have been proposed. For example, a long detection line is installed in the exterior material, a sine wave voltage is applied to the detection line to generate an electric field as a detection area around it, and any intruding object enters the detection area of the detection line. It is known that the capacitance changes and an induced voltage is generated in the detection line, and the type of the intruding object is estimated using this as a detection signal. (For example, see Patent Document 1)
By the way, when an intruder walks in from a garden or the like toward a window or doorway, it does not necessarily come along the wall, and the exterior material of the building as shown in Patent Document 1 above is not necessarily used. In the conventional example in which the detection line is installed inside, the intrusion cannot be detected if the intruder who goes to the window or the entrance does not enter along the wall.
[0003]
In addition, a TV camera or infrared camera is installed outside or inside the building, and a person or animal that has entered the monitoring area through the TV camera or infrared camera is monitored, and the moving object area of the intruding object is tracked, and the height and width are monitored. In addition, there is also known a method in which a rhythm of walking is extracted from time-series data of features such as an area and a person or an animal is determined based on the rhythm. (For example, see Patent Document 2)
In the conventional example shown in Patent Document 2, since a TV camera and an infrared camera are arranged in the site, the appearance is not preferable, and the TV camera and the infrared camera are easily recognized by an intruder. is there.
[0004]
An antitheft alarm device is also known in which a pressing pressure detecting means for detecting the pressing pressure is provided on the rug and the alarm or monitoring device is operated by detecting the pressing pressure (see, for example, Patent Document 3).
However, since what is shown in Patent Document 3 is contact detection for detecting pressure, the pressing pressure detecting means is subjected to mechanical overstress such as static load / impact load, and there is a problem in long-term reliability.
[0005]
By the way, when the stepping stone is installed in the garden, the intruder has a characteristic of walking on the stepping stone and invading toward the entrance / exit. In other words, because they are afraid of leaving footprints in the garden soil, etc. and do not want to attach the garden soil to the back of the footwear, they want to walk on the stepping stones that are placed toward the doorways and windows, and in the garden Even when gravel is spread out, it has a characteristic that it wants to walk on the stepping stones that are arranged toward the doorway and the window because of fear of footsteps. However, conventional stepping stones have no security function, and intruders can easily walk into the entrances and windows of buildings by walking on the stepping stones. However, with the recent worsening of burglary crimes, there is a strong demand for reliably detecting intruder intrusions before entering the entrances and windows of buildings through the garden.
[0006]
[Patent Document 1]
JP-A-9-237390 [Patent Document 2]
Japanese Patent Laid-Open No. 7-50825 [Patent Document 3]
Japanese Patent Laid-Open No. 53-87697
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and a stepping stone existing on a path through which an intruder enters from a garden to a doorway or window of the building has a function of detecting the intruder, and passes through the garden. Intruders can be reliably detected before entering doorways and windows, and small animals such as dogs and cats can be distinguished from intruders to accurately detect intruders. Another object of the present invention is to provide a stepping stone walking detection device capable of stable detection for a long period of time because the detection means is not in contact with the detection object.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problem, the walking detection device for a stepping stone according to the present invention is provided with a plurality of transmission parts 2 in a grid pattern at equal intervals in the vertical and horizontal directions on the upper surface of the stepping stone block 1. of downward, the sensing portion 5 having light projected a light projecting unit 3 for projecting light through each transmission unit 2 and the light receiving portion 4 for receiving reflected light reflected on the object located stepping stone block 1 above the provided, the number of the light receiving portion 4 which received is confirmed, seeking light receiving area by the position determination determines the object the reflected light reflected on the basis of the light receiving area information received by the sensing unit 5 whether the human body It is characterized by comprising the part 6. Here, a signal processing unit 8 is provided in the stepping stone block 1, and a mapping unit 9 for creating a light reception mapping based on the light reception information received by the sensing unit 5 in the signal processing unit 8, and the mapping unit 9 create It is preferable to include a determination unit 6 that determines a light receiving region based on the received light mapping information and determines whether or not the human body.
[0009]
By adopting such a configuration, the number of the light receiving parts 4 that have received the reflected light and the light receiving parts 4 that have received the reflected light among the plurality of transmitting parts 2 provided in a grid shape at equal intervals in the vertical and horizontal directions. The determination unit 6 can determine whether the object located above the stepping stone block 1 is a human body (that is, a human foot) based on the light receiving area information obtained from the position information of the building, and thereby the walking step of the stepping stone block 1 An intruder entering the doorway or window can be reliably detected without making a mistake with small animals such as dogs and cats before entering the doorway or window. Further, since the sensing unit 5 constituting the detection means is in contact with the object to be detected, the sensing unit 5 is not subjected to mechanical excessive stress such as a static load / impact load, and long-term reliability is improved. is there. Moreover, by providing the stepping stone block 1 with the intruder detection function as described above, the appearance of the security camera or the like is better than that exposed in the premises, and there is no sense of incongruity as a crime prevention in the garden. Is.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.
[0015]
The stepping stone 20 is installed in the garden, and the stepping stone 20 is configured by providing a walking detection device in the stepping stone block 1 constituting the main body of the stepping stone 20.
[0016]
As shown in FIG. 2, the stepping stone block 1 is formed by a box having an inner portion serving as a storage portion 7, and has an appearance like a natural stone. Although it is made of artificial stone, metal or plastic and having the storage portion 7 inside, and natural stone or artificial stone attached to the outer surface, it is of course not limited to this.
[0017]
The walking detection device includes a transmission unit 2, a sensing unit 5, a signal processing unit 8, and the like, which will be described later.
[0018]
A plurality of transmission portions 2 are provided on the upper surface of the stepping stone block 1. Here, as shown in FIG. 1, the plurality of transmission portions 2 are arranged in a grid pattern at equal intervals in the vertical and horizontal directions on the upper surface of the stepping stone block 1.
[0019]
In forming a plurality of transmission portions 2 on the upper surface of the stepping stone block 1 in a grid shape at equal intervals in the vertical and horizontal directions, the size of the sole of the person in FIG. The length is A1, the length in the width direction is A2), and the size of the sole of a small animal such as a dog or cat is B (the diameter of the sole is B1). In this case, assuming that the pitch of adjacent transmission parts 2 in both the vertical direction and the horizontal direction is L and the length of the interval between adjacent transmission parts 2 is M, the relationship is A1>A2>L>M> B1. When a person walks on the stepping stone 20, the soles of a person of size A are positioned directly above the plurality of transmission parts 2 as shown in FIG. 1 even if the walking direction and position are different. However, when the small animal walks on the stepping stone 20, the sole of the small animal of size B is directly above the transmission part 2 as shown in FIG. However even one place as positioned so as not to position.
[0020]
The transmission part 2 is formed of a material that transmits near infrared rays. Here, when the transmission part 2 is formed of a material that transmits near infrared rays but does not transmit visible light, the inside of the stepping stone block 1 cannot be seen and the appearance is preferable. In the stepping stone block 1, a light projecting unit 3 that projects upward through the transmitting unit 2 below each of the plurality of transmitting units 2, and reflected light reflected by an object positioned above the stepping stone block 1 is received. The sensing part 5 provided with the light-receiving part 4 for performing is provided. The light projecting unit 3 is composed of a near-infrared light emitting diode and projects near-infrared light. The light receiving unit 4 is composed of a phototransistor, a photodiode, or the like capable of receiving near-infrared light. .
[0021]
A signal processing unit 8 is provided in the stepping stone block 1. As shown in the block diagram of FIG. 3, the signal processing unit 8 creates a light reception mapping based on the light reception information received by the sensing unit 5. A mapping unit 9 and a determination unit 6 that determines whether the human body is based on the light-receiving mapping information created by the mapping unit 9 are provided.
[0022]
The mapping unit 9 creates a light reception mapping based on the light reception information received by each sensing unit 5. That is, as shown in the flowchart of FIG. 4, near-infrared light is emitted from the light projecting units 3 of the plurality of sensing units 5 corresponding to the plurality of transmission units 2 simultaneously or in a time-division manner, and above the plurality of transmission units 2. When there is an object, the near infrared light projected through the corresponding transmission unit 2 is reflected by the upper object and received by the light receiving unit 4. When a light reception detection signal is input to the light receiving unit 4, this detection signal is written as map information in a grid-like map according to the arrangement of the sensing units 5 arranged in a grid, and further map information is grouped. . In this way, the light receiving area is determined based on the number and position of the light receiving units 4 that have been confirmed to receive light, and a light receiving mapping is created. Here, when light is emitted in a time-sharing manner from a plurality of light projecting units 3, a light reception mapping is created based on light reception within a specified time that is equal to or longer than the time required for the end of light emission of all the light projecting units 3.
[0023]
The determination unit 6 determines the size of the light receiving region based on the light reception mapping information (that is, determines the size of a detection group that is a set of sensing units 5 in which light reception is confirmed by the light receiving unit 4), Whether it is a small animal such as a dog or a cat is determined. As shown in FIG. 1, when a person walks on the upper surface of the stepping stone 20, regardless of the direction and the position on which the sole is placed, in the case of the person's sole, there are a plurality of light receiving portions and the light receiving area is also the human foot. Since it has a characteristic size on the back, in the case of a plurality of locations (determined by the size and quantity of the transmission part 2 with respect to the human footprint) where the light receiving locations are set, it is determined that the human is walking.
[0024]
Further, as shown in the block diagram of FIG. 3, the stepping stone block 1 has a notification unit 10 such as a buzzer or a light emitting means, or an external notification unit provided outside the stepping stone block 1 (for example, an external notification unit provided inside the building). As shown in the flowchart of FIG. 4, when the determination unit 6 determines that the human body is present, a signal is sent to the notification unit 10 to give an alarm, or external A signal is sent to the communication unit 11 to notify the external notification unit, and an alarm is given by the external notification unit.
[0025]
The determination that the determination unit 6 is “person (human body)” indicates that the “human (human body)” detection state continues for a certain period of time for the purpose of noise removal. Condition.
[0026]
In this case, it is considered that the “human (human body)” detection state continues even when there is a transition of mapping information (for example, a footprint moves from the lower right to the upper left).
[0027]
It is also considered that both feet are placed when “person (human body)” is detected at a plurality of locations simultaneously.
[0028]
Further, when the light receiving unit 4 continues to receive light for a long time and the detection state continues, the determination unit 6 determines that an obstacle such as dust is placed on the upper surface of the stepping stone block 1, and the alarm unit 10. A signal is sent to the external communication unit 11 to give an alarm, or a signal is sent to the external communication unit 11 to notify the external notification unit, and an alarm is issued by the external notification unit to alert the householder.
[0029]
By the way, when the object is at a position exceeding a predetermined height (for example, 5 cm) from the upper surface of the stepping stone block 1 (that is, the upper surface of the stepping stone 20), the reflected light received by the light receiving unit 4 is set to be invalid. It is. That is, the reflection received by the light receiving unit 4 only when the object is positioned below a predetermined height from the upper surface of the stepping stone block 1 and the reflected light reflected by the object positioned below the predetermined height is received by the light receiving unit 4. The mapping unit 9 creates a light reception mapping by using the light input signal as a valid signal.
[0030]
If the object received by the light receiving unit 4 is reflected light reflected by the object when the object is at a position exceeding a predetermined height from the upper surface of the stepping stone block 1, the following problems will occur. For example, when a small animal such as a dog or a cat walks on the stepping stone 20, when the abdomen of the small animal is positioned above the transmission part 2, the near infrared light emitted from the light projecting part 3 is applied to the abdomen of the small animal such as a dog or cat. If the light is reflected and received by the light receiving unit 4 and this light reception signal is made valid, the number of light receiving points becomes plural, the light receiving area becomes large, and it may be erroneously determined as a human foot. Therefore, in order to prevent such a situation, the reflected light received by the light receiving unit 4 is set to be invalid when the object is at a position exceeding a predetermined height from the upper surface of the stepping stone block 1. . As a result, even if a small animal such as a dog or a cat walks on the upper surface of the stepping stone 20 (that is, the upper surface of the stepping stone block 1), the reflected light reflected on the feet of the small animal such as a dog or cat is made effective. The reflected light is invalidated, the feet of small animals such as dogs and cats are detected accurately, and because the light receiving area is different from that of human feet, the feet of small animals such as dogs and cats are accurately identified. It is possible to determine whether or not it is a human body.
[0031]
Therefore, in the present invention, when a person walks on the stepping stone 20 installed in the garden, the light receiving area information obtained from the number of the light receiving parts 4 that receive the reflected light and the position information of the light receiving parts 4 that receive the reflected light. The determination unit 6 can determine whether or not the object located above the stepping stone 20 is a human body (that is, a human foot), so that the stepping stones 20 arranged in a row can be walked to enter an entrance or window of the building. It is possible to reliably detect an intruder invading toward a small animal such as a dog or a cat without making a mistake. In particular, the stepping stones 20 installed in the garden are arranged in a row toward the entrance and exit window of the building, and as described above, an intruder thief enters the building from the garden. , Fear of leaving footprints in the garden soil and affixing the garden soil to the back of footwear, and fearing the generation of footsteps even when gravel is laid in the garden. Further, it has a characteristic that it wants to walk on the stepping stone 20 that is arranged toward the window such as the entrance / exit of the building or the sweeping window, and therefore the intruder walks on the stepping stone 20 using this characteristic. By detecting this, it is possible to detect the intruder's intrusion before the intruder reaches the window such as the entrance / exit of the building and the sweep window, and perform an alarm operation, etc., and the crime prevention effect is improved.
[0032]
【The invention's effect】
As described above, in the invention according to the first aspect of the present invention, the number of the light receiving portions that receive the reflected light among the plurality of transmitting portions provided in a plurality of grids at equal intervals in the vertical direction and the horizontal direction. The determination unit can determine whether the object located above the stepping stone block is a human body based on the light receiving area information obtained from the position information of the light receiving unit that has received the reflected light, and thereby the entrance of the building by walking through the stepping stone block Sensing is possible because it can detect intruders that invade toward the windows and windows without making mistakes with small animals such as dogs and cats before they enter the doorways and windows. Long-term reliability is improved without being subjected to mechanical overstress such as static load / impact load on the part, and security cameras are exposed in the site by providing a stepping stone block with an intruder detection function Well appearance compared to the shall is that there is no appearance on the discomfort as crime prevention in the garden.
[Brief description of the drawings]
FIG. 1 is a plan view of a stepping stone of the present invention.
2 is a cross-sectional view taken along line XX of FIG.
FIG. 3 is a control block diagram of the above.
FIG. 4 is a flowchart of the above.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stepping stone block 2 Transmission part 3 Light projection part 4 Light reception part 5 Sensing part 6 Judgment part

Claims (2)

踏み石ブロックの上面部に縦方向、横方向に等間隔で複数の透過部を枡目状に設け、各透過部の下方に、それぞれ透過部を通して投光する投光部と投光した光が踏み石ブロック上方に位置する物体に反射した反射光を受光するための受光部とを備えたセンシング部を設け、受光が確認された受光部の数、位置により受光領域を求めて、該受光領域情報に基づいて反射光が反射した物体が人体か否かを判定する判定部を備えて成ることを特徴とする踏み石の歩行検知装置。The upper surface of the stepping stone block is provided with a plurality of transmission parts at equal intervals in the vertical and horizontal directions, and a light projecting part that projects light through each transmission part and a light that is projected through the transmission parts are stepping stones below each transmission part. a sensing unit that includes a light receiving portion for receiving the reflected light reflected from an object located in block upward provided, seeking light receiving region number of light receiving portions receiving has been confirmed, the position, in the light receiving area information A stepping stone walking detection device comprising: a determination unit that determines whether or not an object reflected by reflected light is a human body. 踏み石ブロック内に信号処理部を設け、この信号処理部にセンシング部で受光した受光情報に基づいて受光マッピングを作成するためのマッピング部と、該マッピング部により作成された受光マッピング情報に基づいて受光領域を判定して人体か否かを判定する判定部とを備えて成ることを特徴とする請求項1記載の踏み石の歩行検知装置 A signal processing unit is provided in the stepping stone block, a mapping unit for creating a light reception mapping based on the light reception information received by the sensing unit in the signal processing unit, and a light reception based on the light reception mapping information created by the mapping unit The stepping stone walking detection device according to claim 1, further comprising a determination unit that determines a region and determines whether or not the human body .
JP2003181179A 2003-06-25 2003-06-25 Stepping stone walking detector Expired - Fee Related JP4228798B2 (en)

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