JPH06129902A - Light irradiation range detection device and center detection method of irradiation range in the same - Google Patents
Light irradiation range detection device and center detection method of irradiation range in the sameInfo
- Publication number
- JPH06129902A JPH06129902A JP30155592A JP30155592A JPH06129902A JP H06129902 A JPH06129902 A JP H06129902A JP 30155592 A JP30155592 A JP 30155592A JP 30155592 A JP30155592 A JP 30155592A JP H06129902 A JPH06129902 A JP H06129902A
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- Prior art keywords
- light
- irradiation range
- light receiving
- receiving element
- center
- Prior art date
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Links
- 238000001514 detection method Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 claims description 17
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Abstract
(57)【要約】
【目的】 光の照射範囲が受光素子を配置した平面上に
納まらないような場合についても、正しい中心位置を検
出できる光照射範囲検出装置及びそれにおける照射範囲
の中心検出方式を提供することを目的とする。
【構成】 平面上に等間隔に配置した複数の受光素子１
と、増幅器２からの出力をデジタル値に変換するＡ／Ｄ
変換器５と、Ａ／Ｄ変換器５からの出力の最大値を求め
て照射範囲の中心検出するＣＰＵ４とから構成される光
照射範囲検出装置であり、また最大値を示す受光素子の
位置が、照射平面の外周の受光素子でなければ、その受
光素子の位置を照射範囲の中心とし、照射平面の外周の
受光素子であれば、中心が照射平面上に存在しないと判
定する光照射範囲検出装置における照射範囲の中心検出
方式としている。
(57) [Abstract] [Purpose] A light irradiation range detector that can detect the correct center position even when the light irradiation range does not fit on the plane where the light receiving element is arranged, and a center detection method for the irradiation range in the same The purpose is to provide. [Structure] A plurality of light-receiving elements 1 arranged at equal intervals on a plane
And an A / D that converts the output from the amplifier 2 into a digital value
A light irradiation range detection device comprising a converter 5 and a CPU 4 for detecting the center of the irradiation range by obtaining the maximum value of the output from the A / D converter 5, and the position of the light receiving element showing the maximum value is , If it is not the light receiving element on the outer periphery of the irradiation plane, the position of the light receiving element is set as the center of the irradiation range, and if it is the light receiving element on the outer periphery of the irradiation plane, it is determined that the center does not exist on the irradiation plane. The center of the irradiation area of the device is detected.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、光を使用した測量や侵
入監視等の技術に用いられる光照射範囲検出装置及びそ
れにおける照射範囲の中心検出方式に係り、特に光が照
射された位置の中心を正確に検出することができる光照
射範囲検出装置及びそれにおける照射範囲の中心検出方
式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light irradiation range detecting device used in a technique such as surveying and intrusion monitoring using light and a center detecting method of the irradiation range in the device, and more particularly to a light irradiation position detecting device. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light irradiation range detection device capable of accurately detecting a center and a center detection method of an irradiation range in the light irradiation range detection device.
【０００２】[0002]
【従来の技術】まず、従来の光照射範囲検出装置につい
て図４を使って説明する。図４は、従来の光照射範囲検
出装置の構成ブロック図である。従来の光照射範囲検出
装置は、図４に示すように、複数の受光素子１と、それ
に接続する増幅器２と、増幅器２の出力を比較する比較
器３と、比較器３からの出力を処理するＣＰＵ４とから
構成されている。2. Description of the Related Art First, a conventional light irradiation range detecting device will be described with reference to FIG. FIG. 4 is a configuration block diagram of a conventional light irradiation range detection device. As shown in FIG. 4, a conventional light irradiation range detection device processes a plurality of light receiving elements 1, an amplifier 2 connected to the plurality of light receiving elements 1, a comparator 3 for comparing outputs of the amplifier 2, and an output from the comparator 3. And a CPU 4 that operates.
【０００３】次に、各部の構成について具体的に説明す
ると、受光素子１は、フォトダイオード等を使用し、光
が照射されると光エネルギーを電気信号に変換するもの
で、例えば、図５に示すように、平面上に左右（ｘ）、
上下（ｙ）方向に等間隔でｎ個マトリクス状に配置され
ている。また、各点に配置された受光素子１は、ｘ，ｙ
両方向の位置信号を送出するため、図６（ａ）に示すよ
うにフォトダイオードを２分割して１素子とするか、又
は図６（ｂ）に示すように２つの素子を接近させて配置
するか、どちらかの構成をとるものである。ｘ又はｙ方
向の同一方向の光を検出する受光素子については、図７
の受光素子の接続回路図に示すように、各素子をパラレ
ルに接続して、同一方向の位置検出信号を出力するよう
になっている。Next, the structure of each part will be specifically described. The light receiving element 1 uses a photodiode or the like and converts light energy into an electric signal when irradiated with light. For example, FIG. As shown, on the plane left and right (x),
N pieces are arranged in a matrix at equal intervals in the vertical (y) direction. Further, the light-receiving element 1 arranged at each point is x, y
In order to send the position signals in both directions, the photodiode is divided into two to form one element as shown in FIG. 6A, or the two elements are arranged close to each other as shown in FIG. 6B. Or, it takes either configuration. For a light receiving element that detects light in the same x or y direction, see FIG.
As shown in the connection circuit diagram of the light receiving element, each element is connected in parallel and the position detection signal in the same direction is output.
【０００４】増幅器２は、受光素子１で電気信号に変え
られた微弱な出力を増幅するものである。比較器３で
は、スレッショルドを規定し、各素子毎に増幅器２で増
幅された電気信号と規定値とを比較して、電気信号が規
定値以上の場合のみ、光が照射されたとしてｎビットの
デジタル信号を出力し、規定値に満たない場合は出力し
ないものである。ＣＰＵ４は、各受光素子における受光
の有無を示す比較器３からの出力を記憶し、光を検出し
た受光素子の範囲の真ん中を算出する処理を行うもので
ある。The amplifier 2 amplifies a weak output converted into an electric signal by the light receiving element 1. The comparator 3 defines the threshold value, compares the electric signal amplified by the amplifier 2 with the specified value for each element, and determines that the light is irradiated and the n-bit It outputs a digital signal and does not output it if it does not reach the specified value. The CPU 4 stores the output from the comparator 3 indicating the presence or absence of light reception in each light receiving element, and performs the process of calculating the center of the range of the light receiving element that detected the light.
【０００５】次に、従来の光照射範囲検出装置における
照射範囲の中心検出方式について説明する。従来の照射
範囲の中心検出方式では、光が照射され、受光素子１で
光が電気信号に変換され、増幅器２で増幅され、比較器
３で規定以上の光であると判断された受光素子の範囲
を、ｘ方向はｘa 〜ｘb 、ｙ方向はｙa 〜ｙb とする
と、照射範囲の中心は次の式で求められる。 ｘ方向 （ｘb −ｘa ）／２＋ｘa−１ …（１） ｙ方向 （ｙb −ｙa ）／２＋ｙa−１ …（２）Next, a method of detecting the center of the irradiation range in the conventional light irradiation range detecting device will be described. In the conventional method of detecting the center of the irradiation range, the light is irradiated, the light is converted into an electric signal by the light receiving element 1, the light is amplified by the amplifier 2, and the light of the light receiving element judged by the comparator 3 to be more than the specified light is detected. Assuming that the range is xa to xb in the x direction and ya to yb in the y direction, the center of the irradiation range is obtained by the following formula. x direction (xb-xa) / 2 + xa-1 (1) y direction (yb-ya) / 2 + ya-1 (2)
【０００６】一例として、図８の（Ａ）部分の位置に光
が照射された場合、ｘ方向はｘ4 〜ｘn-2 、ｙ方向はｙ
2 〜ｙ5 が光が照射された位置として検出され、各方向
の照射範囲の中心は、以下の式で求められることにな
る。 ｘ方向 （ｎ−２−４）／２＋３ ｙ方向 （５−２）／２＋１As an example, when the position (A) in FIG. 8 is irradiated with light, the x direction is x4 to xn-2 and the y direction is y.
2 to y5 are detected as the positions irradiated with light, and the center of the irradiation range in each direction is calculated by the following formula. x direction (n-2-4) / 2 + 3 y direction (5-2) / 2 + 1
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、上記従
来の光照射範囲検出装置及びそれにおける照射範囲の中
心検出方式では、光の照射範囲が受光素子を配置した平
面上に納まらないような場合に誤った中心位置を算出し
てしまうという問題点があった。However, the above-mentioned conventional light irradiation range detection device and the center detection method of the irradiation range in the above-mentioned conventional light irradiation range detection apparatus are erroneous when the light irradiation range does not fall on the plane where the light receiving element is arranged. There was a problem that the center position was calculated.
【０００８】例として、図８の（Ｂ）部分のように光の
照射範囲が受光素子を配置した平面上に納まらないよう
な場合についても、ｘ方向はｘ1 〜ｘ3 、ｙ方向はｙn-
3 〜ｙn が光が照射された位置として検出され、各方向
の照射範囲の中心は、以下の式で求められてしまう。 ｘ方向 （３−１）／２＋０ ｙ方向 （ｎ−ｎ−３）／２＋ｎ−４ つまり、受光素子で検出された照射範囲は、全照射範囲
の中のほんの一部であるにもかかわらず、その部分のみ
に照射されたとして、その中心を求めてしまうことにな
り、本来の照射範囲の中心を正確に検出できない問題が
あった。As an example, even in the case where the light irradiation range does not fall on the plane on which the light receiving element is arranged, as in the portion (B) of FIG. 8, the x direction is x1 to x3 and the y direction is yn-.
3 to yn are detected as positions irradiated with light, and the center of the irradiation range in each direction is obtained by the following formula. x direction (3-1) / 2 + 0 y direction (n−n−3) / 2 + n−4 That is, although the irradiation range detected by the light receiving element is only a part of the entire irradiation range, Even if only that portion is irradiated, the center of the irradiation area will be obtained, and there is a problem that the center of the original irradiation range cannot be accurately detected.
【０００９】本発明は上記実情に鑑みて為されたもの
で、光の照射範囲が受光素子を配置した平面上に納まら
ないような場合についても、正しい中心位置を検出でき
る光照射範囲検出装置及びそれにおける照射範囲の中心
検出方式を提供することを目的とする。The present invention has been made in view of the above circumstances, and a light irradiation range detection device and a light irradiation range detection device capable of detecting a correct center position even when the light irradiation range does not fall on the plane where the light receiving elements are arranged, It is an object of the present invention to provide a method for detecting the center of an irradiation range in that case.
【００１０】[0010]
【課題を解決するための手段】上記従来例の問題点を解
決するための請求項１記載の発明は、光照射範囲検出装
置において、照射平面に配列され、照射された光を受光
して光エネルギーを電気信号に変換する複数の受光素子
と、前記受光素子からの出力を増幅する増幅器と、前記
増幅器からの出力をデジタル値に変換するＡ／Ｄ変換器
と、前記Ａ／Ｄ変換器からの出力を比較して最大値を求
め、前記最大値を示す受光素子の位置を照射範囲の中心
として検出する処理を行うＣＰＵとを有することを特徴
としている。The invention according to claim 1 for solving the above-mentioned problems of the prior art is, in a light irradiation range detecting apparatus, arranged on an irradiation plane and receives the irradiated light to receive light. A plurality of light receiving elements for converting energy into electric signals, an amplifier for amplifying the output from the light receiving elements, an A / D converter for converting the output from the amplifier into a digital value, and the A / D converter And a CPU that performs a process of obtaining a maximum value by comparing the outputs of the above and detecting the position of the light receiving element having the maximum value as the center of the irradiation range.
【００１１】上記従来例の問題点を解決するための請求
項２記載の発明は、請求項１記載の光照射範囲検出装置
における照射範囲の中心検出方式において、照射平面の
受光素子における光の強さの最大値を求め、前記最大値
を示す受光素子の位置が、前記照射平面の外周の受光素
子でない場合は、該受光素子の位置を照射範囲の中心と
し、前記最大値を示す受光素子の位置が、前記照射平面
の外周の受光素子である場合は、照射範囲の中心が前記
照射平面上に存在しないと判定することを特徴としてい
る。According to a second aspect of the present invention for solving the above-mentioned problems of the conventional example, in the method of detecting the center of the irradiation range in the light irradiation range detecting device according to the first aspect, the intensity of light in the light receiving element on the irradiation plane is increased. If the position of the light receiving element showing the maximum value is not the light receiving element on the outer periphery of the irradiation plane, the position of the light receiving element is set as the center of the irradiation range and the light receiving element showing the maximum value is calculated. When the position is the light receiving element on the outer periphery of the irradiation plane, it is characterized that it is determined that the center of the irradiation range does not exist on the irradiation plane.
【００１２】[0012]
【作用】請求項１記載の発明によれば、平面上に等間隔
に配置した複数の受光素子で光を受光して電気信号に変
換し、受光素子からの微弱な出力を増幅器で増幅し、増
幅器からの出力をＡ／Ｄ変換器でデジタル値に変換し、
Ａ／Ｄ変換器からの出力をＣＰＵで比較して最大値を求
め、最大値を示す受光素子の位置を照射範囲の中心とし
て検出する光照射範囲検出装置としているので、複数の
受光素子中で最大の強さの光を受光した箇所を光照射範
囲の中心とすることができ、光照射範囲の中心を正確に
検出できる。According to the invention described in claim 1, a plurality of light receiving elements arranged on a plane at equal intervals receive light and convert it into an electric signal, and a weak output from the light receiving element is amplified by an amplifier, The output from the amplifier is converted to a digital value with an A / D converter,
Since the output from the A / D converter is compared by the CPU to obtain the maximum value and the position of the light receiving element showing the maximum value is detected as the center of the irradiation range, the light irradiation range detection device is used. The position where the light of the maximum intensity is received can be set as the center of the light irradiation range, and the center of the light irradiation range can be accurately detected.
【００１３】請求項２記載の発明によれば、照射平面の
受光素子における光の強さの最大値を求め、最大値を示
す受光素子の位置が、照射平面の外周の受光素子でない
場合は、その受光素子の位置を照射範囲の中心とし、最
大値を示す受光素子の位置が、照射平面の外周の受光素
子である場合は、照射範囲の中心が照射平面上に存在し
ないと判定する請求項１記載の光照射範囲検出装置にお
ける照射範囲の中心検出方式としているので、光の照射
範囲が受光素子を配置した平面上に納まらないような場
合でも、誤った中心を検出することがなく、光照射範囲
の中心を正確に検出できる。According to the second aspect of the invention, the maximum value of the light intensity in the light receiving element on the irradiation plane is determined, and when the position of the light receiving element showing the maximum value is not the light receiving element on the outer periphery of the irradiation plane, When the position of the light receiving element is the center of the irradiation range and the position of the light receiving element showing the maximum value is the light receiving element on the outer periphery of the irradiation plane, it is determined that the center of the irradiation range does not exist on the irradiation plane. Since the method for detecting the center of the irradiation range in the light irradiation range detection device according to 1 is used, even if the irradiation range of the light does not fall on the plane where the light receiving element is arranged, the wrong center is not detected and the light is detected. The center of the irradiation range can be accurately detected.
【００１４】[0014]
【実施例】本発明の一実施例について図面を参照しなが
ら説明する。図１は、本発明の一実施例に係る光照射範
囲検出装置の構成ブロック図である。尚、図４と同様の
構成をとる部分については同一の符号を付して説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration block diagram of a light irradiation range detection apparatus according to an embodiment of the present invention. It should be noted that portions having the same configuration as in FIG.
【００１５】本実施例の光照射範囲検出装置は、従来の
光照射範囲検出装置と同様に複数の受光素子１とそれに
接続する増幅器２と、本実施例の特徴である増幅器２の
出力をデジタル信号に変換するＡ／Ｄ変換器５と、Ａ／
Ｄ変換器５からの出力を処理するＣＰＵ４と、Ａ／Ｄ変
換器５からの出力を記憶するメモリ６とから構成されて
いる。The light irradiation range detection apparatus of this embodiment is similar to the conventional light irradiation range detection apparatus in that a plurality of light receiving elements 1 and an amplifier 2 connected thereto, and the output of the amplifier 2 which is a feature of this embodiment are digital. A / D converter 5 for converting into a signal, and A / D
It is composed of a CPU 4 that processes the output from the D converter 5 and a memory 6 that stores the output from the A / D converter 5.
【００１６】受光素子１は、従来の光照射範囲検出装置
と同様で、フォトダイオード等を使用し、光が照射され
ると光エネルギーを電気信号に変換するもので、図５に
示すように平面上に左右（ｘ）、上下（ｙ）方向に等間
隔でｎ個のマトリクス状に配置されている。また、増幅
器２も従来の光照射範囲検出装置と同様で、受光素子１
で電気信号に変えられた微弱な出力を増幅するものであ
る。The light receiving element 1 is similar to a conventional light irradiation range detecting device, and uses a photodiode or the like to convert light energy into an electric signal when irradiated with light. As shown in FIG. It is arranged in a matrix of n pieces at equal intervals in the left and right (x) and up and down (y) directions. Further, the amplifier 2 is also similar to the conventional light irradiation range detecting device, and the light receiving element 1
It amplifies a weak output converted into an electric signal.
【００１７】Ａ／Ｄ変換器５は、増幅器２からの出力を
デジタル信号に変換し、照射された光の強さをデジタル
値としてＣＰＵ４に出力するものである。The A / D converter 5 converts the output from the amplifier 2 into a digital signal and outputs the intensity of the emitted light as a digital value to the CPU 4.
【００１８】ＣＰＵ４は、Ａ／Ｄ変換器５から出力され
た各受光素子１の光の強さを示すデジタル値をメモリ６
に記憶し、全てのデジタル値を比較して最大値を求める
ことで光の強さの最大値を求める。そして、最大値を示
す受光素子の位置が、照射平面の外周の受光素子でない
場合は、その受光素子の位置を照射範囲の中心とし、最
大値を示す受光素子の位置が、照射平面の外周の受光素
子である場合は、照射範囲の中心が照射平面上に存在し
ないと判定する処理を行うものである。The CPU 4 stores in the memory 6 a digital value indicating the light intensity of each light receiving element 1 output from the A / D converter 5.
Then, the maximum value of light intensity is obtained by comparing all digital values and obtaining the maximum value. Then, when the position of the light receiving element showing the maximum value is not the light receiving element on the outer periphery of the irradiation plane, the position of the light receiving element is set as the center of the irradiation range, and the position of the light receiving element showing the maximum value is on the outer periphery of the irradiation plane. In the case of a light receiving element, a process of determining that the center of the irradiation range does not exist on the irradiation plane is performed.
【００１９】次に、本実施例の光照射範囲検出装置にお
ける照射範囲の中心検出方式について説明する前に、本
実施例の光照射範囲の中心検出方式の原理となる、光の
特性について図２を使って説明する。図２は指向性を持
った光のファーフィールドパターン図である。尚、図２
において、縦軸が光エネルギーの強さを、横軸が照射角
度を示しており、横軸の中心が光が照射平面に対して垂
直に照射した時の角度となっている。Next, before describing the method of detecting the center of the irradiation range in the light irradiation range detecting apparatus of this embodiment, the characteristics of light, which is the principle of the center detection method of the light irradiation range of this embodiment, will be described with reference to FIG. Use to explain. FIG. 2 is a far-field pattern diagram of light having directivity. Incidentally, FIG.
In, the vertical axis represents the intensity of light energy, the horizontal axis represents the irradiation angle, and the center of the horizontal axis is the angle when the light is irradiated perpendicularly to the irradiation plane.
【００２０】検出する光の光源が指向性を持った光源の
場合、照射角度に対して光エネルギーの強さを示すファ
ーフィールドパターンは図２に示すような正規分布とな
り、光エネルギーが中心部に集中する。この特性によ
り、平面上に等間隔で配置した受光素子１で受光した光
の強さの最大値を求め、その最大値を示す受光素子の位
置を照射範囲の中心と考えるものである。When the light source of the light to be detected is a directional light source, the far field pattern showing the intensity of the light energy with respect to the irradiation angle has a normal distribution as shown in FIG. concentrate. Based on this characteristic, the maximum value of the intensity of the light received by the light receiving elements 1 arranged at equal intervals on the plane is obtained, and the position of the light receiving element showing the maximum value is considered as the center of the irradiation range.
【００２１】次に、本実施例の光照射範囲検出装置にお
ける光照射範囲の中心検出方式について説明する。本実
施例の光照射範囲の中心検出方式では、受光素子１が等
間隔に配置された平面上に光が照射されると、各受光素
子１で光エネルギーが電気信号に変換され、各増幅器２
で増幅され、各Ａ／Ｄ変換器５でデジタル値に変換さ
れ、ＣＰＵ４に送出される。Next, a method of detecting the center of the light irradiation range in the light irradiation range detecting apparatus of this embodiment will be described. In the method of detecting the center of the light irradiation range of the present embodiment, when light is irradiated onto the plane where the light receiving elements 1 are arranged at equal intervals, light energy is converted into an electric signal by each light receiving element 1 and each amplifier 2 is output.
Is amplified by, converted into a digital value by each A / D converter 5, and sent to the CPU 4.
【００２２】ＣＰＵ４では、各Ａ／Ｄ変換器５から送ら
れてきた光の強さを示すデジタル値をメモリ６に記憶
し、まず、ｘ方向、ｙ方向それぞれに比較して光の強さ
の最大値を求め、その最大値を示す受光素子の位置がｘ
a，ｙbであるとする。そして、ｘa，ｙbが照射平面の外
周の受光素子でない場合、つまり、（１＜ａ＜ｎ）かつ
（１＜ｂ＜ｎ）の場合は、その受光素子の位置ｘa ，ｙ
b を照射範囲の中心とする。また、ｘa ，ｙb が照射平
面の外周の受光素子の場合、つまり、（ａ＝１）又は
（ａ＝ｎ）若しくは（ｂ＝１）又は（ｂ＝ｎ）の場合
は、照射範囲の中心が受光素子１を配置した照射平面か
ら外れていると判定する。In the CPU 4, the digital value indicating the intensity of light sent from each A / D converter 5 is stored in the memory 6, and first, the digital value of the intensity of light is compared with the x direction and the y direction. The maximum value is calculated, and the position of the light receiving element that shows the maximum value is x
Let a and yb. If xa and yb are not light receiving elements on the outer circumference of the irradiation plane, that is, if (1 <a <n) and (1 <b <n), the positions xa and y of the light receiving elements are set.
Let b be the center of the irradiation range. When xa and yb are light receiving elements on the outer periphery of the irradiation plane, that is, when (a = 1) or (a = n) or (b = 1) or (b = n), the center of the irradiation range is It is determined that the light receiving element 1 is out of the irradiation plane.
【００２３】図３の例で、照射範囲の中心が受光素子１
を配置した照射平面から外れている場合について説明す
る。図３は、本実施例に係る受光素子の配置と、光の照
射範囲の一例である。図３の（Ｂ′）部分に光が照射さ
れた場合、ｘ方向についてはｘ1 よりもｘ2 ，ｘ3 の光
の強さが大きい場合は、照射範囲の中心はｘ2 ，ｘ3の
いずれかと判定でき、ｘ1 よりもｘ2 ，ｘ3 の光の強さ
が小さい場合は、照射範囲の中心は照射平面から外れて
いると判定される。ｙ方向についても同様の判定が為さ
れる。In the example of FIG. 3, the center of the irradiation range is the light receiving element 1.
The case where the position is out of the irradiation plane in which is arranged will be described. FIG. 3 is an example of the arrangement of the light receiving elements according to the present embodiment and the light irradiation range. When the light is irradiated to the portion (B ') of FIG. 3, and the intensity of light of x2 and x3 is larger than x1 in the x direction, it can be determined that the center of the irradiation range is either x2 or x3. When the intensity of light at x2 and x3 is smaller than that at x1, it is determined that the center of the irradiation range is off the irradiation plane. The same determination is made for the y direction.
【００２４】上記のような照射範囲の中心検出方式によ
り、光の照射範囲が受光素子を配置した平面上に納まる
場合には、正しい中心を検出できる効果があり、また、
光の照射範囲が受光素子を配置した平面上に納まらない
ような場合については、平面上に中心位置がないことを
判定できるため、誤った中心を検出せず、装置の信頼性
を向上させることができる効果がある。With the above-described irradiation area center detection method, when the irradiation area of light falls within the plane on which the light receiving element is arranged, there is an effect that the correct center can be detected.
When the light irradiation range does not fit on the plane where the light receiving element is placed, it is possible to determine that there is no center position on the plane, so the wrong center is not detected and the reliability of the device is improved. There is an effect that can be.
【００２５】本実施例の光照射範囲検出装置及びそれに
おける照射範囲の中心検出方式を測距等に使用すれば、
照準位置と光の照射位置のズレの補正を正確に行うこと
ができる効果がある。If the light irradiation range detecting apparatus of this embodiment and the center detection method of the irradiation range in the apparatus are used for distance measurement and the like,
There is an effect that the deviation between the aiming position and the light irradiation position can be accurately corrected.
【００２６】本実施例の光照射範囲検出装置及びそれに
おける照射範囲の中心検出方式を侵入監視装置等に使用
すれば、光を照射する側の位置決めを短時間で正確に行
うことができる効果がある。If the light irradiation range detecting apparatus of this embodiment and the center detection method of the irradiation range in the apparatus are used for an intrusion monitoring apparatus or the like, the light irradiation side can be positioned accurately in a short time. is there.
【００２７】本実施例の光照射範囲検出装置及びそれに
おける照射範囲の中心検出方式を光空間データ伝送装置
等に使用すれば、光を照射する側の位置決めを短時間で
正確に行うことができる効果がある。If the light irradiation range detecting device of this embodiment and the center detecting method of the irradiation range in the light irradiation range detecting device are used for an optical space data transmission device or the like, the light irradiation side can be accurately positioned in a short time. effective.
【００２８】[0028]
【発明の効果】請求項１記載の発明によれば、平面上に
等間隔に配置した複数の受光素子で光を受光して電気信
号に変換し、受光素子からの微弱な出力を増幅器で増幅
し、増幅器からの出力をＡ／Ｄ変換器でデジタル値に変
換し、Ａ／Ｄ変換器からの出力をＣＰＵで比較して最大
値を求め、最大値を示す受光素子の位置を照射範囲の中
心として検出する光照射範囲検出装置としているので、
複数の受光素子中で最大の強さの光を受光した箇所を光
照射範囲の中心とすることができ、光照射範囲の中心を
正確に検出できる効果がある。According to the first aspect of the present invention, a plurality of light receiving elements arranged at equal intervals on a plane receive light and convert it into an electric signal, and a weak output from the light receiving element is amplified by an amplifier. Then, the output from the amplifier is converted into a digital value by the A / D converter, the output from the A / D converter is compared by the CPU to obtain the maximum value, and the position of the light receiving element showing the maximum value is set to the irradiation range. Since it is a light irradiation range detection device that detects as the center,
A portion of the plurality of light receiving elements that has received the light of maximum intensity can be set as the center of the light irradiation range, and the center of the light irradiation range can be accurately detected.
【００２９】請求項２記載の発明によれば、照射平面の
受光素子における光の強さの最大値を求め、最大値を示
す受光素子の位置が、照射平面の外周の受光素子でない
場合は、その受光素子の位置を照射範囲の中心とし、最
大値を示す受光素子の位置が、照射平面の外周の受光素
子である場合は、照射範囲の中心が照射平面上に存在し
ないと判定する請求項１記載の光照射範囲検出装置にお
ける照射範囲の中心検出方式としているので、光の照射
範囲が受光素子を配置した平面上に納まらないような場
合でも、誤った中心を検出することがなく、光照射範囲
の中心を正確に検出できる効果がある。According to the second aspect of the invention, the maximum value of the light intensity in the light receiving element on the irradiation plane is obtained, and when the position of the light receiving element showing the maximum value is not the light receiving element on the outer periphery of the irradiation plane, When the position of the light receiving element is the center of the irradiation range and the position of the light receiving element showing the maximum value is the light receiving element on the outer periphery of the irradiation plane, it is determined that the center of the irradiation range does not exist on the irradiation plane. Since the method for detecting the center of the irradiation range in the light irradiation range detection device according to 1 is used, even if the irradiation range of the light does not fall on the plane where the light receiving element is arranged, the wrong center is not detected and the light is detected. There is an effect that the center of the irradiation range can be accurately detected.
【図１】本発明の一実施例に係る光照射範囲検出装置の
構成ブロック図である。FIG. 1 is a configuration block diagram of a light irradiation range detection device according to an embodiment of the present invention.
【図２】指向性を持った光のファーフィールドパターン
図である。FIG. 2 is a far-field pattern diagram of light having directivity.
【図３】本実施例に係る光照射範囲検出装置の受光素子
の配置と、光の照射範囲の一例である。FIG. 3 is an example of an arrangement of light receiving elements of a light irradiation range detection device according to the present embodiment and a light irradiation range.
【図４】従来の光照射範囲検出装置の構成ブロック図で
ある。FIG. 4 is a configuration block diagram of a conventional light irradiation range detection device.
【図５】従来の光照射範囲検出装置の受光素子の配置図
である。FIG. 5 is a layout view of a light receiving element of a conventional light irradiation range detection device.
【図６】従来の光照射範囲検出装置の受光素子の回路図
である。FIG. 6 is a circuit diagram of a light receiving element of a conventional light irradiation range detection device.
【図７】従来の光照射範囲検出装置の受光素子の接続回
路図である。FIG. 7 is a connection circuit diagram of a light receiving element of a conventional light irradiation range detection device.
【図８】従来の光照射範囲検出装置の受光素子の配置
と、光の照射範囲の一例である。FIG. 8 is an example of an arrangement of light receiving elements of a conventional light irradiation range detection device and a light irradiation range.
１…受光素子、 ２…増幅器、 ３…比較器、 ４…Ｃ
ＰＵ、 ５…Ａ／Ｄ変換器、 ６…メモリ1 ... Light receiving element, 2 ... Amplifier, 3 ... Comparator, 4 ... C
PU, 5 ... A / D converter, 6 ... Memory
Claims (2)
光して光エネルギーを電気信号に変換する複数の受光素
子と、前記受光素子からの出力を増幅する増幅器と、前
記増幅器からの出力をデジタル値に変換するＡ／Ｄ変換
器と、前記Ａ／Ｄ変換器からの出力を比較して最大値を
求め、前記最大値を示す受光素子の位置を照射範囲の中
心として検出する処理を行うＣＰＵとを有することを特
徴とする光照射範囲検出装置。1. A plurality of light receiving elements arranged on an irradiation plane for receiving the irradiated light and converting light energy into an electric signal, an amplifier for amplifying an output from the light receiving element, and an output from the amplifier. To obtain a maximum value by comparing an output from the A / D converter with an A / D converter that converts the value into a digital value, and detect the position of the light receiving element having the maximum value as the center of the irradiation range. A light irradiation range detection device, comprising: a CPU for performing.
いて、照射平面の受光素子における光の強さの最大値を
求め、前記最大値を示す受光素子の位置が、前記照射平
面の外周の受光素子でない場合は、該受光素子の位置を
照射範囲の中心とし、前記最大値を示す受光素子の位置
が、前記照射平面の外周の受光素子である場合は、照射
範囲の中心が前記照射平面上に存在しないと判定するこ
とを特徴とする光照射範囲検出装置における照射範囲の
中心検出方式。2. The light irradiation range detection device according to claim 1, wherein the maximum value of the light intensity of the light receiving element on the irradiation plane is obtained, and the position of the light receiving element showing the maximum value is on the outer circumference of the irradiation plane. If it is not a light receiving element, the position of the light receiving element is the center of the irradiation range, and if the position of the light receiving element showing the maximum value is a light receiving element on the outer periphery of the irradiation plane, the center of the irradiation range is the irradiation plane. A method for detecting the center of an irradiation range in a light irradiation range detection device, characterized in that it is determined that it does not exist above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4301555A JP2710526B2 (en) | 1992-10-15 | 1992-10-15 | Light irradiation range detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4301555A JP2710526B2 (en) | 1992-10-15 | 1992-10-15 | Light irradiation range detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06129902A true JPH06129902A (en) | 1994-05-13 |
| JP2710526B2 JP2710526B2 (en) | 1998-02-10 |
Family
ID=17898354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4301555A Expired - Fee Related JP2710526B2 (en) | 1992-10-15 | 1992-10-15 | Light irradiation range detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2710526B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6222004A (en) * | 1985-07-22 | 1987-01-30 | Toshiba Corp | Detecting method for optical axis position |
-
1992
- 1992-10-15 JP JP4301555A patent/JP2710526B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6222004A (en) * | 1985-07-22 | 1987-01-30 | Toshiba Corp | Detecting method for optical axis position |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2710526B2 (en) | 1998-02-10 |
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