JP2013024740A - Detector - Google Patents

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JP2013024740A
JP2013024740A JP2011160176A JP2011160176A JP2013024740A JP 2013024740 A JP2013024740 A JP 2013024740A JP 2011160176 A JP2011160176 A JP 2011160176A JP 2011160176 A JP2011160176 A JP 2011160176A JP 2013024740 A JP2013024740 A JP 2013024740A
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light
light projecting
light receiving
water
projecting unit
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JP5588400B2 (en
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Kenji Adachi
研治 安達
So Yamamoto
壮 山本
Noriyuki Kitachi
範行 北地
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Panasonic Corp
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Panasonic Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a detector which can accurately detect the existence of an object to be detected regardless of the inclination of the object.SOLUTION: A detector includes a limited reflection type photoelectric sensor 1. The limited reflection type photoelectric sensor 1 includes a light projecting part 8 whose light irradiation area is limited to a reflective object, and a light receiving part 9 which receives the light irradiated from the light projecting part 8 and reflected by the reflective object. When the output of the light receiving part 9 becomes a prescribed value or less, it is determined that an object 3 exists.

Description

本発明は、光電センサーを用いて物体の有無を検出する検出装置に関する。   The present invention relates to a detection device that detects the presence or absence of an object using a photoelectric sensor.

例えば特許文献１には、放射器から伝達された信号を物体に反射させてこの信号を検出器で受信することにより、物体を検出する検出装置が開示されている。   For example, Patent Document 1 discloses a detection device that detects an object by reflecting a signal transmitted from a radiator to an object and receiving the signal with a detector.

特開平１−３０４２３１号公報JP-A-1-304231

ところで、この種の反射型光電センサーには限定反射型光電センサーがある。限定反射型光電センサーは、投受光の指向角度を小さくし、投光光芒と受光光芒が交差する限られた距離範囲内の光照射領域（動作領域）のみで物体の有無を検出するものであり、次のように用いられる。すなわち、投光部から照射された光が光照射領域に存在する物体に反射し、この反射光が受光部で受けられ、これにより受光部における反射光の検出値（出力）が高くなった場合に物体が検出される。この限定反射型光電センサーを用いた物体の検出では、光照射領域を限られた範囲にすることで強い受光出力を得ることができ、反射率の低い物体も検出できるといった利点がある。   By the way, there is a limited reflection type photoelectric sensor in this type of reflection type photoelectric sensor. The limited reflection type photoelectric sensor detects the presence or absence of an object only in a light irradiation area (operation area) within a limited distance range where the light projecting light beam and the light receiving light beam intersect with each other by reducing the directivity angle of the light projecting and receiving light. Are used as follows. That is, when the light emitted from the light projecting part is reflected by an object existing in the light irradiation area, and this reflected light is received by the light receiving part, thereby increasing the detection value (output) of the reflected light at the light receiving part An object is detected. In the detection of an object using this limited reflection type photoelectric sensor, there is an advantage that a strong light receiving output can be obtained by setting the light irradiation region to a limited range, and an object having a low reflectance can be detected.

しかし、限定反射型光電センサーは投受光の指向角度が小さいため、上記のように限定反射型光電センサーを用いて物体の有無を検出した場合、検出する物体の傾きによって受光部で受ける光の強さにばらつきが生じ、物体の有無を正確に検出できない可能性がある。   However, since the limited reflection type photoelectric sensor has a small directivity angle for light projection and reception, when the presence or absence of an object is detected using the limited reflection type photoelectric sensor as described above, the intensity of light received by the light receiving unit due to the inclination of the object to be detected. There is a possibility that the presence or absence of an object cannot be accurately detected.

本発明は上記事情に鑑みてなされたものであって、検出する物体の傾きにかかわらず、精度良く物体の有無を検出できる検出装置を提供することを課題とする。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a detection device that can accurately detect the presence or absence of an object regardless of the inclination of the object to be detected.

上記課題を解決するために本発明の検出装置は、限定反射型光電センサーを備え、この限定反射型光電センサーは、光照射領域を検出しようとする領域より遠方に設けられた反射物に限定した投光部と、この投光部から照射されて前記反射物で反射した光を受光する受光部を有し、前記受光部の出力が所定値以下になった場合に、前記検出しようとする領域に物体が有ると判定することを特徴とする。   In order to solve the above problems, the detection apparatus of the present invention includes a limited reflection type photoelectric sensor, and the limited reflection type photoelectric sensor is limited to a reflector provided farther from the region where the light irradiation region is to be detected. A light projecting unit and a light receiving unit configured to receive light emitted from the light projecting unit and reflected by the reflecting object, and the region to be detected when the output of the light receiving unit becomes a predetermined value or less It is characterized in that it is determined that there is an object.

また、前記反射物を吐水部から吐出された水を受ける水受部とし、前記投光部から照射された光が前記吐水部と前記反射物の間を通過するようにすることが好ましい。   Further, it is preferable that the reflecting object is a water receiving part that receives water discharged from the water discharging part, and the light irradiated from the light projecting part passes between the water discharging part and the reflecting object.

また、前記吐水部は前記水受部から突出したカランの先端部に設けられた吐水口であり、前記投光部及び受光部のうち、一方が前記カランの先端部に設けられると共に、他方が前記カランの先端部から基端側に離れた位置に設けられることが好ましい。   Further, the water discharge portion is a water discharge port provided at a tip end portion of the curan protruding from the water receiving portion, and one of the light projecting portion and the light receiving portion is provided at the tip end portion of the currant and the other is provided. It is preferable to be provided at a position away from the distal end portion of the currant to the proximal end side.

また、前記反射物を物体を搬送するコンベヤーとし、前記投光部から照射された光が前記コンベヤー上を通過するようにすることことが好ましい。   Moreover, it is preferable that the reflector is a conveyor that conveys an object, and the light irradiated from the light projecting unit passes on the conveyor.

本発明にあっては、検出する物体の傾きにかかわらず、精度良く物体の有無を検出できる。   In the present invention, the presence or absence of an object can be accurately detected regardless of the inclination of the object to be detected.

本発明の実施形態の一例の検出装置を示す説明図である。It is explanatory drawing which shows the detection apparatus of an example of embodiment of this invention. 限定反射型光電センサーのブロック図である。It is a block diagram of a limited reflection type photoelectric sensor. 他例の検出装置を示す説明図である。It is explanatory drawing which shows the detection apparatus of another example. 他の実施形態の検出装置を示す説明図である。It is explanatory drawing which shows the detection apparatus of other embodiment. （ａ）は比較例の検出装置を示す説明図であり、（ｂ）は比較例の検出装置において、物体が傾いたときの様子を示す説明図である。(A) is explanatory drawing which shows the detection apparatus of a comparative example, (b) is explanatory drawing which shows a mode when an object inclines in the detection apparatus of a comparative example.

以下、本発明を添付図面に基づいて説明する。本実施形態の検出装置は、図１に示す流し台５に設けられるものであり、カラン６先端部の下側の検出領域２における手や皿等の物体３の有無を検出するために用いられる。そして、この検出情報に基づいて、カラン６からシンク７に水を吐出するか否かが切り替えられるようになっている。   Hereinafter, the present invention will be described with reference to the accompanying drawings. The detection device of the present embodiment is provided on the sink 5 shown in FIG. 1 and is used to detect the presence or absence of an object 3 such as a hand or a plate in the detection area 2 below the tip of the currant 6. Based on this detection information, whether or not to discharge water from the currant 6 to the sink 7 can be switched.

流し台５のシンク７にはカラン６が設けられている。カラン６は、シンク７の後縁部から立ち上がるカラン本体部１０と、カラン本体部１０の上端部から前方に突出する管状の突出部１１とで構成されている。突出部１１の先端部には吐水部として下方に開口する吐水口１２が設けられており、吐水口１２から下方に吐出された水は、水受部を構成するシンク７の底部１３で受けられるようになっている。   A sink 6 of the sink 5 is provided with a currant 6. The currant 6 includes a currant main body 10 that rises from the rear edge of the sink 7 and a tubular projecting portion 11 that projects forward from the upper end of the currant main body 10. A water discharge port 12 that opens downward as a water discharge portion is provided at the tip of the protruding portion 11, and water discharged downward from the water discharge port 12 is received at the bottom portion 13 of the sink 7 that constitutes the water receiving portion. It is like that.

本実施形態の検出装置は、図２に示す限定反射型光電センサー１と制御部４を備えている。   The detection device of this embodiment includes the limited reflection photoelectric sensor 1 and the control unit 4 shown in FIG.

限定反射型光電センサー１は、強い受光出力を得るために投受光の指向角度を小さくして動作領域を投光光芒と受光光芒が交差する限られた距離範囲のみの領域（限定領域）に限定した赤外線センサーである。   In order to obtain a strong light reception output, the limited reflection photoelectric sensor 1 reduces the directivity angle of light projection / reception and limits the operation area to an area (limited area) only in a limited distance range where the light projecting light beam and the light receiving light beam intersect. Infrared sensor.

図１に示すように、限定反射型光電センサー１は、赤外線を照射する投光素子で構成された投光部８と、赤外線を受ける受光素子で構成された受光部９を有している。投光部８は、カラン６の突出部１１の先端部に設けられており、受光部９はカラン本体部１０の上端部に設けられており、受光部９は投光部８よりもカラン６の基端側に離れた箇所に位置している。   As shown in FIG. 1, the limited reflection photoelectric sensor 1 includes a light projecting unit 8 composed of a light projecting element that emits infrared light, and a light receiving unit 9 composed of a light receiving element that receives infrared light. The light projecting portion 8 is provided at the tip end portion of the projecting portion 11 of the currant 6, the light receiving portion 9 is provided at the upper end portion of the currant main body portion 10, and the light receiving portion 9 is more current than the light projecting portion 8. It is located in the place distant to the base end side.

なお、図１では図面の簡略化のため投光部８が突出部１１の前方に図示されているが、実際には突出部１１の先端部に設けられる。また、図示は省略するが、投光部８の近傍及び受光部９の近傍には投光部用レンズ及び受光部用レンズが夫々設けられており、投光部８から照射された赤外線は投光部用レンズで集光されて動作領域と一致させた光照射領域に向けて照射される。また、受光部用レンズでは光照射領域（動作領域）で反射した反射光が受光部９で受けられるように集光される。   In FIG. 1, the light projecting portion 8 is illustrated in front of the projecting portion 11 for simplification of the drawing, but is actually provided at the tip of the projecting portion 11. Although not shown, a light projecting unit lens and a light receiving unit lens are provided in the vicinity of the light projecting unit 8 and in the vicinity of the light receiving unit 9, respectively. The infrared rays emitted from the light projecting unit 8 are projected. The light is condensed by the lens for the light part and irradiated toward the light irradiation region that is matched with the operation region. In the light receiving unit lens, the reflected light reflected by the light irradiation region (operation region) is condensed so that it can be received by the light receiving unit 9.

投光部８の光照射方向は後斜め下方に設定され、受光部９の受光方向は前斜め下方に設定されており、投光部８から照射される赤外線の投光軸と受光部９で受けられる赤外線の受光軸は、シンク７の底部１３で交差する。すなわち、限定反射型光電センサー１の動作領域は検出しようとする領域（検出領域）２よりも遠方となるシンク７の底部１３に限定され、この底部１３を反射物として投光部８から照射された赤外線が受光部９側に反射するように設定されている。   The light emitting direction of the light projecting unit 8 is set obliquely downward in the rear, the light receiving direction of the light receiving unit 9 is set obliquely downward in the front, and the infrared light projecting axis irradiated from the light projecting unit 8 and the light receiving unit 9 The received infrared light receiving axis intersects at the bottom 13 of the sink 7. That is, the operation area of the limited reflection photoelectric sensor 1 is limited to the bottom 13 of the sink 7 which is farther than the area (detection area) 2 to be detected, and the bottom 13 is irradiated from the light projecting unit 8 as a reflector. The infrared rays are set to be reflected toward the light receiving unit 9 side.

投光部８から光照射領域であるシンク７の底部１３に向けて照射された赤外線は、吐水口１２とシンク７の底部１３の間にある検出領域２を通過するように設定されている。検出領域２は吐水口１２から吐出される水の吐出領域に位置している。このため、図１のように、手や皿等の物体３を洗うために検出領域２に物体３を差し入れた場合、投光部８から照射された赤外線は図１中の実線矢印で示されるようにシンク７の底部１３において反射する前に物体３によって遮られることとなる。   Infrared rays irradiated from the light projecting unit 8 toward the bottom portion 13 of the sink 7 which is a light irradiation region are set so as to pass through the detection region 2 between the water outlet 12 and the bottom portion 13 of the sink 7. The detection area 2 is located in the discharge area of water discharged from the water outlet 12. Therefore, as shown in FIG. 1, when the object 3 is inserted into the detection region 2 in order to wash the object 3 such as a hand or a dish, the infrared rays emitted from the light projecting unit 8 are indicated by solid arrows in FIG. Thus, the light is blocked by the object 3 before being reflected at the bottom 13 of the sink 7.

このように投光部８から照射された赤外線が検出領域２に存在する物体３によって遮断された場合、受光部９には投光部８から照射された赤外線が届かなくなるものであり、制御部４はこれを利用して検出領域２における物体３の有無を判定する。   Thus, when the infrared ray irradiated from the light projecting unit 8 is blocked by the object 3 existing in the detection region 2, the infrared ray irradiated from the light projecting unit 8 does not reach the light receiving unit 9, and the control unit 4 uses this to determine the presence or absence of the object 3 in the detection region 2.

すなわち制御部４は、常時または間欠的に、投光部８から赤外線をシンク７の底部１３に向けて照射すると共に受光部９の受光出力を監視する。そして、受光部９の出力（受光量）が予め設定された所定値以下になった場合には、検出領域２に物体３が有ると判定する。受光部９の出力が所定値以下になることは、投光部８から照射された赤外線が検出領域２に存在する物体３によって遮られて、受光部９に届かないことを意味するからである。なお、前記所定値は、投光部８から照射された光がシンク７の底部１３で反射して受光部９で受光したときの受光部９の出力よりも小さい値に設定されている。   That is, the control unit 4 constantly or intermittently irradiates infrared light from the light projecting unit 8 toward the bottom 13 of the sink 7 and monitors the light reception output of the light receiving unit 9. Then, when the output (light reception amount) of the light receiving unit 9 is equal to or less than a predetermined value set in advance, it is determined that the object 3 exists in the detection region 2. The reason why the output of the light receiving unit 9 is equal to or less than a predetermined value is that the infrared light emitted from the light projecting unit 8 is blocked by the object 3 present in the detection region 2 and does not reach the light receiving unit 9. . The predetermined value is set to a value smaller than the output of the light receiving unit 9 when the light emitted from the light projecting unit 8 is reflected by the bottom 13 of the sink 7 and received by the light receiving unit 9.

また、受光部９の出力が前記所定出力値を超えた値となった場合は、検出領域２に物体３が無いと判定する。受光部９の出力が前記所定出力値を超えることは、投光部８から照射された赤外線が図１中の破線で示すようにそのままシンク７の底部１３に照射され、該底部１３で反射して受光部９で受けられることを意味するからである。   When the output of the light receiving unit 9 exceeds the predetermined output value, it is determined that there is no object 3 in the detection area 2. The fact that the output of the light receiving unit 9 exceeds the predetermined output value means that the infrared light irradiated from the light projecting unit 8 is directly irradiated to the bottom 13 of the sink 7 as shown by the broken line in FIG. This is because it means that the light is received by the light receiving unit 9.

制御部４は、前記物体３の有無の判定結果に基づいてカラン６の吐水口１２からの吐水の有無を切り替える。この切り替えは、カラン６又はカラン６よりも上流側の給水路（不図示）に設けた電磁弁等で構成される開閉弁１４（図２参照）を制御することによって行われる。   The controller 4 switches the presence / absence of water discharged from the water outlet 12 of the currant 6 based on the determination result of the presence / absence of the object 3. This switching is performed by controlling the on-off valve 14 (refer to FIG. 2) configured by the solenoid valve or the like provided in the water supply channel (not shown) upstream of the caran 6 or the caran 6.

すなわち、制御部４が検出領域２に物体３が有ると判定した場合は、開閉弁１４を開いて吐水口１２からシンク７に水を吐出する。これにより、吐水口１２から吐出された水を吐水口１２の下方に差し入れた手や皿等の物体３に当てて洗うことができる。また、制御部４は、検出領域２に物体３が無いと判定した場合、開閉弁１４を閉じて吐水口１２からの吐水を停止する。   That is, when the control unit 4 determines that the object 3 is present in the detection region 2, the on-off valve 14 is opened and water is discharged from the water outlet 12 to the sink 7. Thereby, the water discharged from the spout 12 can be washed by hitting the object 3 such as a hand or a dish inserted below the spout 12. Further, when it is determined that the object 3 is not present in the detection area 2, the control unit 4 closes the on-off valve 14 and stops water discharge from the water discharge port 12.

以上説明した検出装置にあっては、限定反射型光電センサー１の動作領域を反射物（シンク７の底部１３）に限定し、受光部９の出力が所定値以下になった場合に物体３が有ると判定する。この検出装置にあっては、検出領域２に物体３が存在する場合、この物体３の傾きにかかわらず投光部８から照射された赤外線が物体３によって遮断され、これにより物体３の存在が検出される。   In the detection apparatus described above, the operation region of the limited reflection photoelectric sensor 1 is limited to the reflecting object (the bottom portion 13 of the sink 7), and the object 3 is detected when the output of the light receiving unit 9 becomes a predetermined value or less. It is determined that there is. In this detection apparatus, when the object 3 is present in the detection area 2, the infrared rays emitted from the light projecting unit 8 are blocked by the object 3 regardless of the inclination of the object 3, and the presence of the object 3 is thereby detected. Detected.

図５に比較例を示す。この比較例では、限定反射型光電センサー１の動作領域を検出領域２に限定し、投光部８から照射されて、検出領域２に存在する物体３で反射した光を受光部９で検出した場合に、検出領域２に物体３が有ると判定する。この比較例にあっては、図５（ｂ）のように検出領域２に存在する物体３が傾いた場合、物体３で反射した照射光が受光部９で受光されず、検出領域２に物体３が無いと判定されてしまう。しかし、本実施形態では、前述のように投光部８から照射された赤外線が物体３によって遮断されることにより、受光部９の受光出力が所定値以下になった場合に物体３が有ると判定する。このため、物体３の傾きにかかわらず検出領域２における物体３の有無を正確に検出することができる。   FIG. 5 shows a comparative example. In this comparative example, the operation region of the limited reflection photoelectric sensor 1 is limited to the detection region 2, and the light irradiated from the light projecting unit 8 and reflected by the object 3 existing in the detection region 2 is detected by the light receiving unit 9. In this case, it is determined that the object 3 is present in the detection area 2. In this comparative example, when the object 3 existing in the detection area 2 is tilted as shown in FIG. 5B, the irradiation light reflected by the object 3 is not received by the light receiving unit 9, and the object is detected in the detection area 2. It is determined that 3 is not present. However, in the present embodiment, if the object 3 is present when the infrared light emitted from the light projecting unit 8 is blocked by the object 3 as described above, the light reception output of the light receiving unit 9 becomes a predetermined value or less. judge. For this reason, the presence or absence of the object 3 in the detection region 2 can be accurately detected regardless of the inclination of the object 3.

また、本実施形態では、図１に示すように、前記反射物を吐水口１２から吐出された水を受けるシンク７の底部１３とし、投光部８から照射された赤外線が吐水口１２とシンク７の底部１３の間を通過するようにしている。この構成により、吐水口１２とシンク７の底部１３の間に差し入れられた手や皿等の物体３の有無を正確に検出することができる。   Moreover, in this embodiment, as shown in FIG. 1, the said reflector is made into the bottom part 13 of the sink 7 which receives the water discharged from the spout 12, and the infrared rays irradiated from the light projection part 8 are the spout 12 and the sink. 7 is passed between the bottom portions 13. With this configuration, it is possible to accurately detect the presence or absence of an object 3 such as a hand or a dish inserted between the water outlet 12 and the bottom 13 of the sink 7.

また、より正確に検出領域２における物体３の有無を検出するには、動作領域を狭い範囲に限定するのがよい。ここで、本実施形態では、投光部８をカラン６の先端部に設けると共に、受光部９をカラン６の先端部から基端側に離れた位置に設けている。このため、同一のカラン６に投光部８及び受光部９を設けたものにおいて、投光部８から照射された赤外線が受光部９に受けられるまでの距離を長くできる。また、投光軸と受光軸の交差する角度を大きくすることができる。従って、動作領域を狭い範囲に限定して検出精度を高めることができる。   Further, in order to detect the presence / absence of the object 3 in the detection region 2 more accurately, it is preferable to limit the operation region to a narrow range. Here, in the present embodiment, the light projecting portion 8 is provided at the distal end portion of the currant 6, and the light receiving portion 9 is provided at a position away from the distal end portion of the currant 6 toward the proximal end side. For this reason, in the case where the light projecting unit 8 and the light receiving unit 9 are provided on the same curan 6, the distance until the infrared light irradiated from the light projecting unit 8 is received by the light receiving unit 9 can be increased. In addition, the angle at which the light projecting axis and the light receiving axis intersect can be increased. Therefore, the detection accuracy can be increased by limiting the operation region to a narrow range.

なお、本実施形態では投光部８をカラン６の先端部に設けると共に受光部９をカラン６の先端部から基端側に離れた位置に設けたが、受光部９をカラン６の先端部に設けると共に投光部８をカラン６の先端部から基端側に離れた位置に設けてもよい。また、投光部８及び受光部９を設ける位置はこれらに限定されるものではなく、例えば図３に示すように、投光部８をカラン本体部１０の上端部又は突出部１１の基端部に設け、受光部９をカラン本体部１０の下部に設ける等してもかまわない。   In the present embodiment, the light projecting portion 8 is provided at the distal end portion of the currant 6 and the light receiving portion 9 is provided at a position away from the distal end portion of the currant 6 toward the proximal end side. The light projecting portion 8 may be provided at a position away from the distal end portion of the currant 6 toward the proximal end side. Further, the positions where the light projecting unit 8 and the light receiving unit 9 are provided are not limited to these. For example, as shown in FIG. 3, the light projecting unit 8 is connected to the upper end portion of the curran main body 10 or the base end of the projecting portion 11. The light receiving unit 9 may be provided in the lower part of the currant main body 10.

また、本実施形態では、検出装置を流し台５に設けたが、同様に吐水部や水受部を有する洗面台や手洗い器等に設けてもよい。   Moreover, in this embodiment, although the detection apparatus was provided in the sink 5, similarly, you may provide in the washstand and hand-washing machine etc. which have a water discharging part and a water receiving part.

また、検出装置を吐水部や水受部を有さないものに設けてもよく、例えば図４に示すように検出装置を物体３を搬送するコンベヤー１５に設けてもよい。以下、図４に示す他の実施形態について説明する。なお、以下の実施形態の説明では、図１に示す実施形態と同一の構成については同一の番号を付与し、重複する説明は省略する。   Moreover, you may provide a detection apparatus in what does not have a water discharging part and a water receiving part, for example, as shown in FIG. 4, you may provide a detection apparatus in the conveyor 15 which conveys the object 3. As shown in FIG. Hereinafter, another embodiment shown in FIG. 4 will be described. In the following description of the embodiment, the same components as those in the embodiment shown in FIG.

コンベヤー１５の上方には投光部８と受光部９が物体３の搬送方向に離間して設けられている。図４中符号１６はベルトであり、符号１７はローラーである。限定反射型光電センサー１の動作領域と一致させた光照射領域はコンベヤー１５のベルト１６に限定されており、このベルト１６を反射物として投光部８から照射された赤外線が受光部９側に反射するように設定されている。また、投光部８から光照射領域であるベルト１６に向けて照射された赤外線は、コンベヤー１５によって搬送される物体３が通る領域を通過するように設定されており、本実施形態における検出領域２はベルト１６上の領域となっている。   Above the conveyor 15, a light projecting unit 8 and a light receiving unit 9 are provided apart from each other in the conveying direction of the object 3. In FIG. 4, reference numeral 16 denotes a belt, and reference numeral 17 denotes a roller. The light irradiation area matched with the operation area of the limited reflection photoelectric sensor 1 is limited to the belt 16 of the conveyor 15, and the infrared rays irradiated from the light projecting unit 8 are reflected on the light receiving unit 9 side by using the belt 16 as a reflecting object. It is set to reflect. In addition, the infrared light emitted from the light projecting unit 8 toward the belt 16 that is the light irradiation region is set so as to pass through the region through which the object 3 conveyed by the conveyor 15 passes, and the detection region in the present embodiment. Reference numeral 2 denotes an area on the belt 16.

制御部４は、図１に示す実施形態と同様に限定反射型光電センサー１の検出情報に基づいて検出領域２における物体３の有無を判定する。すなわち、投光部８から照射された赤外線が遮断されて受光部９に届かないときにのみ、検出領域２に物体３が有ると判定する。   The control unit 4 determines the presence or absence of the object 3 in the detection region 2 based on the detection information of the limited reflection photoelectric sensor 1 as in the embodiment shown in FIG. That is, it is determined that the object 3 is present in the detection region 2 only when the infrared light emitted from the light projecting unit 8 is blocked and does not reach the light receiving unit 9.

このように本実施形態では、前記反射物を物体３を搬送するコンベヤー１５とし、投光部８から照射された赤外線がコンベヤー１５上を通過するように設定している。このため、コンベヤー１５上の搬送物である物体３の有無を正確に検出することができる。   As described above, in the present embodiment, the reflecting material is the conveyor 15 that conveys the object 3, and the infrared rays irradiated from the light projecting unit 8 are set to pass on the conveyor 15. For this reason, the presence or absence of the object 3 which is a conveyed product on the conveyor 15 can be detected accurately.

なお、上記各実施形態の限定反射型光電センサー１は信号光として赤外線を照射するものであるが、可視光線を照射するものであってもよい。また、上記各実施形態では、限定反射型光電センサー１の照射光が照射される反射物をシンク７の底部１３としたが、反射物は投光部８に対する距離が一定であり且つ投光部８に対して固定的な反射面を有するものであればその他のものであってもよい。   In addition, although the limited reflection photoelectric sensor 1 of each said embodiment irradiates infrared rays as signal light, it may irradiate visible rays. Further, in each of the above embodiments, the reflecting object irradiated with the irradiation light of the limited reflection type photoelectric sensor 1 is the bottom portion 13 of the sink 7. However, the reflecting object has a constant distance to the light projecting unit 8 and the light projecting unit. Others may be used as long as they have a fixed reflecting surface with respect to 8.

１ 限定反射型光電センサー
３ 物体
６ カラン
８ 投光部
９ 受光部
１５ コンベヤー DESCRIPTION OF SYMBOLS 1 Limited reflection type photoelectric sensor 3 Object 6 Curran 8 Light emitting part 9 Light receiving part 15 Conveyor

Claims (4)

限定反射型光電センサーを備え、この限定反射型光電センサーは、光照射領域を検出しようとする領域より遠方に設けられた反射物に限定した投光部と、この投光部から照射されて前記反射物で反射した光を受光する受光部を有し、前記受光部の出力が所定値以下になった場合に、前記検出しようとする領域に物体が有ると判定することを特徴とする検出装置。   The limited reflection photoelectric sensor includes a light projecting unit that is limited to a reflector provided farther than a region where the light irradiation region is to be detected, and the light projecting unit that is irradiated with the light projecting unit. A detection device having a light receiving portion for receiving light reflected by a reflecting object, and determining that an object is present in the region to be detected when an output of the light receiving portion is a predetermined value or less. . 前記反射物を吐水部から吐出された水を受ける水受部とし、前記投光部から照射された光が前記吐水部と前記反射物の間を通過するようにしたことを特徴とする請求項１に記載の検出装置。   The light reflecting portion is a water receiving portion that receives water discharged from the water discharging portion, and the light irradiated from the light projecting portion passes between the water discharging portion and the reflecting material. 2. The detection device according to 1. 前記吐水部は前記水受部から突出したカランの先端部に設けられた吐水口であり、前記投光部及び受光部のうち、一方が前記カランの先端部に設けられると共に、他方が前記カランの先端部から基端側に離れた位置に設けられることを特徴とする請求項２に記載の検出装置。   The water discharge portion is a water discharge port provided at a tip end of the curan protruding from the water receiving portion, and one of the light projecting portion and the light receiving portion is provided at the tip end portion of the currant and the other is the currant. The detection device according to claim 2, wherein the detection device is provided at a position distant from the distal end portion toward the proximal end side. 前記反射物を物体を搬送するコンベヤーとし、前記投光部から照射された光が前記コンベヤー上を通過するようにしたことを特徴とする請求項１に記載の検出装置。   The detection apparatus according to claim 1, wherein the reflector is a conveyor that conveys an object, and the light emitted from the light projecting unit passes through the conveyor.
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