JP3956856B2

JP3956856B2 - Laser distance measuring device

Info

Publication number: JP3956856B2
Application number: JP2003019476A
Authority: JP
Inventors: 達也本田; 貴司岸田; 裕史前田; 一成吉村
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2003-01-28
Filing date: 2003-01-28
Publication date: 2007-08-08
Anticipated expiration: 2023-01-28
Also published as: JP2004233106A

Description

【０００１】
【発明の属する技術分野】
本発明は、測距対象物にレーザを照射して測距対象物までの距離を算出するレーザ測距装置に関し、詳しくはレーザで測距する距離を校正する機能を備えたレーザ測距装置に関するものである。
【０００２】
【従来の技術】
従来、図１４に示すように互いに対向し合うように平行に配置された一対の平面鏡ａと、この一対の平面鏡ａのうち一方の端部近くに配置された基準検出対象物ｂとを有する基準距離設定具ｃを備え、レーザで測距する距離を校正する機能を持たせたものがある（例えば、特許文献１参照）。
【０００３】
かかるレーザ測距装置ｄでは上記基準距離設定具ｃを取り付け状態でレーザ測距装置ｄからレーザ光を基準検出対象物ｂに当て、レーザで測定した距離と基準距離設定具ｃで設定された距離とを比較してレーザで測定する距離を正しく校正するようになっている。
【０００４】
【特許文献１】
特開平１１−２７１４４８号公報
【０００５】
【発明が解決しようとする課題】
ところが、上記従来例にあっては、レーザで測定する距離を校正するために基準距離を設定する基準距離設定具ｃを特別に設けなければならなく、構造が複雑になると共に校正しないときは基準距離設定具ｃが邪魔になるためにそれを取り外さなければならなくて取り扱いがしにくいという問題がある。また基準距離設定具ｃは校正するときに基準距離を設定するという機能しかない。
【０００６】
本発明は上記の点に鑑みてなされたものであり、物差し状測距器具を設けるという簡単な構造でレーザで測定する距離を校正できると共に取り扱いがしやく、物差し状測距器具自体でも測距できて校正以外にも利用できて便利に測距できるレーザ測距装置を提供することを課題とするものである。
【０００７】
【課題を解決するための手段】
上記課題を解決するための本発明のレーザ測距装置は、レーザ測距装置本体６に、測距対象物へレーザ光を照射する投光部１と、測距対象物からの反射光を受光する受光部２と、投光部１から受光部２にレーザ光が到達する時間により測距対象物までの距離を算出する演算部３とから構成されるレーザ測距部４を備えて成るレーザ測距装置において、物差しのようにして距離を測定し得る物差し状測距器具５をレーザ測距装置本体６に着脱自在に装着し、物差し状測距器具５により測定される一定距離とレーザ測距部４で実測した距離との差を算出すると共にその差によりレーザ測距部４の測距値を校正する手段を演算部３に備えるとともに、物差し状測距器具５の測距向きとレーザ測距部４の測距向きが同じか否かを判定すると共に物差し状測距器具５が使用状態か否かを判定し、両者の判定がイエスとなる場合にだけ校正作業を行い、それ以外の場合には測距作業を行う切り替え制御手段を有することを特徴とする。
【０００８】
上記構成のレーザ測距装置とすることで、物差し状測距器具５にて測定する実際の距離とレーザ測距部４で測定する距離との差を比較してレーザ測距部４で測定する測距値を校正することができる。このとき物差し状の測距器具５にて校正するときの基準距離を設定するために従来の校正のための専用の基準距離設定具に比べて構造が簡単で且つ取り扱いが容易にできる。また物差し状測距器具５を使って物差しのように距離の測定も行うことができる。加えて、物差し状測距器具５が必要ないときは取り外すことで軽量化が図れて携帯性を向上でき、更に、上記切り替え制御手段により校正作業と測距作業の切り替えが単純な切り替え構造で実現できると共に校正作業と測距作業とを明確に分離した使用ができる。
【０００９】
また物差し状測距器具５は巻尺５ａであることを特徴とすることも好ましい。物差し状測距器具５として巻尺５ａはコンパクトで本体構造を大きくすることなく校正機能を持たせることができ、携帯性を向上できる。
【００１０】
また物差し状測距器具５はスケール５ｂであり、レーザ測距装置本体６にスケール５ｂの一端を差し込んでスケール５ｂを保持する手段を具備したことを特徴とすることも好ましい。スケール５ｂが必要でないときには簡単に取り外すことができ、軽量化できて携帯性を向上できる。
【００１１】
また物差し状測距器具５が９０°毎に角度を設定して固定可能にされたことを特徴とすることも好ましい。レーザ測距部４と物差し状測距器具５との両方を用いて測距することにより直角の位置関係にある測定面を測定できる。また１つの装置で２点の距離を同時に測定することができる。
【００１２】
またレーザ測距部４で測距する向きと１８０°反対の向きに物差し状測距器具５を向けて固定できる構造にされたことを特徴とすることも好ましい。２つの測定面間の任意の位置から、これらの測定面間の距離を測定することができる。１つの装置で２点間の距離を測定することができる。
【００１３】
またレーザ測距部４からのレーザ光が垂直に当る板７をレーザ光が当る位置とレーザ光が当らない位置とに位置変更可能なように物差し状測距器具５に設けたことを特徴とすることも好ましい。物差し状測距器具５に設けた板７にレーザ光を当てて反射させることによりレーザの測距値の校正ができ、校正するときの基準面の有無や基準面までの距離に影響されずに校正作業を行うことができる。また校正作業状態を保持した状態、測距作業中に一時的に校正作業を実行した状態からでも板７にレーザ光が当らないように位置変更することで測距作業を連続的に行うことができるので、作業効率が向上する。
【００１４】
また上記レーザ光が当る板７が反射板であることを特徴とすることも好ましい。投光部１から照射したレーザ光を確実に反射して受光部２に受光することで測距でき、レーザが照射される面の形状、色、材質に依存せずに校正作業を行うことができる。
【００１５】
また受光レンズ８に着脱自在に装着し得るレンズカバー９に反射面を備え、このレンズカバー９が上記レーザ光の当る板になっていることを特徴とすることも好ましい。通常時にレンズカバー９をレンズ保護用のカバーとして取り付けていることで携帯性の妨げにもならず、校正作業時にはレンズカバー９の反射面を基準面として使用でき、測距作業時にはレンズカバー９の反射面を測定面として使用できるため、作業性と携帯性を向上できる。また測距作業時にレンズカバー９の反射面を測定面とすることで測定面の形状、色、材質に依存しない正確な測距作業ができる。
【００１６】
【発明の実施の形態】
図１、図２に示すように本発明のレーザ測距装置はレーザ測距部４を有するレーザ測距装置本体６に物差し状測距器具５を組み込むことでレーザ測距部４で測距した測距値を校正し得る機能を持たせてある。レーザ測距部４は測距対象物にレーザ光を照射して対象物までの距離を算出するものであって、測距対象物へレーザ光を照射する一つの投光部１と、測距対象物からの反射光を受光する一つの受光部２と、投光部１から受光部２にレーザ光が到達する時間により測距対象物までの距離を演算する演算部３とから構成されている。上記受光部２には受光レンズ８が設けられている。レーザ測距装置本体６には表示部１０が設けられており、レーザ測距部４で測距して演算した距離がデジタル表示のような表示で表示されるようになっている。
【００１７】
物差し状測距器具５は物差しのように距離を測定するものであって、本例の場合、所謂コンベックスと称される巻尺５ａで形成されており、この巻尺５ａがレーザ測距装置本体６に組み込まれている。この巻尺５ａは巻き戻すことで距離が計れるようになっているが、この巻尺５ａで測定した距離はレーザ測距部４の演算部３に入力されるようになっている。例えば、巻尺５ａの巻き出した長さを検出することで自動的に巻尺５ａで測定した長さを演算部３に入力できるようになっている。この際、巻尺５ａで測定した距離も表示部１０で表示できるようになっていてもよい。この物差し状測距器具５としての巻尺５ａで測定した距離を基準としてレーザで測定する距離を校正できるようになっており、演算部３にこの距離を校正する校正手段を備えている。
【００１８】
レーザ測距部４で測定する距離を校正する場合、先ず、図３（ａ）のような差演算フローで測距値の差を演算し、次いで図３（ｂ）のような測距値校正フローにてレーザの測距値を校正する。物差し状測距器具５としての巻尺５ａを用いて図４（ａ）に示すように基準面１１までの距離を測定し（測距値１）、レーザによる測距方式を用いて図４（ｂ）に示すように基準面１１までの距離を測定し（測距値２）、測距値１と測距値２との差Ｄを算出する（差Ｄ＝測距値１−測距値２）。このように前処理として図３（ａ）のような差演算フローを実行して差Ｄを算出した後、次のように図３（ｂ）のような測距値校正フローにてレーザの測距値を校正する。レーザ測距方式を用いて距離を測距し（測距値Ａ）し、上記差Ｄを測距値Ａに加算して測距値Ａ′に校正する。
【００１９】
上記のように巻尺５ａにて測定する実際の距離とレーザ測距部４で測定する距離との差を比較してレーザ測距部４で測定する測距値を校正することができる。このとき巻尺５ａにて校正するときの基準距離を設定するために従来の校正のための専用の基準距離設定具に比べて構造が簡単で且つ取り扱いが容易にできる。また巻尺５ａ自体を使って距離の測定も行うことができる。また物差し状測距器具５として巻尺５ａはコンパクトで本体構造を大きくすることなく校正機能を持たせることができ、携帯性を向上できる。
【００２０】
また上記のようにして測距値を校正できるようになっていると、図５（ａ）（ｂ）に示すようにレーザ測距装置本体６から基準面１１までの基準距離をＬ１、Ｌ２と任意の距離にしても校正を行うことができる。このように任意に基準距離を設定して校正作業を行うことができると、作業空間の広さに依存しないで校正作業を行うことができる。
【００２１】
図６は他の例を示すものである。本例の場合、物差し状測距器具５としてスケール５ｂを用いている。図６（ｃ）（ｄ）のようにレーザ測距装置本体６の下面側に差し込み溝１２を設けると共に差し込み溝１２にバネ１３を内装して保持部を形成してあり、図６（ａ）（ｂ）のようにスケール５ｂの一端を差し込み溝１２に差し込んでバネ１３にて保持してあり、スケール５ｂが抜き差しで着脱できるように着脱自在に装着してある。
【００２２】
上記のように構成せるレーザ測距装置はスケール５ｂをレーザ測距装置本体６に装着すると、スケール５ｂの長さを基準距離して上記例と同様に測距値を校正することができる。スケール５ｂが必要でないとき（校正しないとき）には簡単に取り外すことができ、軽量化できて携帯性を向上できる。またスケール５ｂ自体を用いて寸法を計測することもできる。
【００２３】
図７は他の例を示すものである。本例の場合、物差し状測距器具５として所謂コンベックスと称される巻尺５ａを用いており、この巻尺５ａをレーザ測距装置本体６に着脱自在に取り付けてある。この場合、巻尺５ａを装着すると、上記例と同様に測距値を校正することができ、また物差し状測距器具５としての巻尺５ａが必要でないときは取り外すことで軽量化が図れ、携帯性を向上できる。
【００２４】
図８は他の例を示すものである。本例の場合、物差し状測距器具５としての巻尺５ａが３６０°回転可能になるようにレーザ測距装置本体６に装着してあり、９０°毎に角度を設定して固定可能にされている。このようにしてあると例えばレーザ測距部４を用いて矢印αのように第１の測定面１５ａまでの距離を測定すると共に巻尺５ａで矢印βのように第２の測定面１５ｂまでの距離を測定することができる。レーザ測距部４と巻尺５ａとの両方を用いて測距することにより直角の位置関係にある測定面を測定できる。また１つの装置で２点の距離を同時に測定することができる。
【００２５】
また図９は他の例を示すものである。本例の場合、レーザ測距部４で測距する方向と同じ方向を向けて巻尺５ａを固定できる以外に、レーザ測距部４で測距する向きと１８０°反対の向きに巻尺５ａを向けて固定できる構造になっている。レーザ測距部４で測距する方向と同じ方向に巻尺５ａを向けて固定した状態では上記例と同様にレーザによる測距値を校正できる。またレーザ測距部４で測距する向きと１８０°反対の向きに巻尺５ａを向けて固定すると、レーザ測距部４で矢印αのように第１の測定面１５ａまでの距離γを測定し、巻尺５ａで矢印βのように第１の測定面１５ａと対向する第２の測定面１５ｂまでの距離δを測定することができ、これにより第１、第２の測定面１５ａ，１５ｂ間の距離ε（測定面間距離ε＝距離γ＋距離δ＋巻尺本体長さη）を測定することができる。これにより２つの測定面間の任意の位置から、これらの測定面間の距離を測定することができる。１つの装置で２点間の距離を測定することができる。
【００２６】
図１０は他の例を示すものである。本例の場合、巻尺５ａのような物差し状測距器具５をレーザ測距部４のレーザ光出射方向と同じ向きを向けたときだけ校正作業を行うことが可能となる切り替え制御手段を有する。図１０に示すように物差し状測距器具５の取り付け位置角度が０度（物差し状測距器具５の測距向きとレーザ測距部４の測距向きが同じ）か否かを判定すると共に物差し状測距器具５が使用状態か否かを判定し、両者がＹＥＳなら校正処理をし、それ以外のときは測距処理をするように切り替えることができるようになっている。このようになっていると、校正作業と測距作業の切り替えが単純な切り替え構造で実現できると共に校正作業と測距作業とを明確に分離した使用ができる。
【００２７】
図１１は他の例を示すものである。本例の場合、物差し状測距器具５は巻尺５ａであり、巻尺５ａの先端にレーザが当る基準面となる板７が設けてある。この板７は図１１（ａ）のように水平に倒した状態から図１１（ｂ）のように垂直に立てるとレーザ測距部４からのレーザ光が垂直に当り、この状態でレーザの測距値を校正することができる。また図１１（ｂ）のように板７を垂直に立てた状態から図１１（ｃ）に示すようにレーザ光の方向と平行な向きに向けることができ、校正途中でもレーザ光を測定面に照射した測距作業ができるようになっている。このようにすると、校正するときの基準面の有無や基準面までの距離に影響されずに校正作業を行うことができる。また校正作業状態を保持した状態、測距作業中に一時的に校正作業を実行した状態からでも板７にレーザ光が当らないように位置変更することで測距作業を連続的に行うことができるので、作業効率が向上する。
【００２８】
図１２は他の例を示す。上記例のように垂直に立てたときレーザ光が当る板７が反射板７ａで形成されている。拡散面を持つ反射板７ａで形成されていると、投光部１から照射したレーザ光を確実に反射板７ａにて反射して受光部２に受光されることで測距でき、レーザが照射される面の形状、色、材質に依存せずに校正作業を行うことができる。
【００２９】
図１３は他の例を示す。受光レンズ８には受光レンズ８を保護するためレンズカバー９が図１３（ａ）に示すように着脱自在に装着されているが、このレンズカバー９の内面に反射面を備えている。このレンズカバー９は取り外したとき、レンズカバー９を図１３（ｂ）のように巻尺５ａの先端に配置または取り付けしたり、測定面に配置したりできるようになっている。このようにすると、通常時にレンズカバー９をレンズ保護用のカバーとして取り付けていることで携帯性の妨げにもならず、校正作業時にはレンズカバー９の反射面を基準面として使用でき、測距作業時にはレンズカバー９の反射面を測定面として使用できるため、作業性と携帯性を向上できる。また測距作業時にレンズカバー９の反射面を測定面とすることで測定面の形状、色、材質に依存しない正確な測距作業ができる。
【００３０】
【発明の効果】
本発明の請求項１の発明は、レーザ測距装置本体に、測距対象物へレーザ光を照射する投光部と、測距対象物からの反射光を受光する受光部と、投光部から受光部にレーザ光が到達する時間により測距対象物までの距離を算出する演算部とから構成されるレーザ測距部を備えて成るレーザ測距装置において、物差しのようにして距離を測定し得る物差し状測距器具をレーザ測距装置本体に着脱自在に装着し、物差し状測距器具により測定される一定距離とレーザ測距部で実測した距離との差を算出すると共にその差によりレーザ測距部の測距値を校正する手段を演算部に備えたので、物差し状測距器具にて測定する実際の距離とレーザ測距部で測定する距離との差を比較してレーザ測距部で測定する測距値を校正することができるものであって、このとき物差し状の測距器具にて校正するときの基準距離を設定するために従来の校正のための専用の基準距離設定具に比べて構造が簡単で且つ取り扱いが容易にできるものであり、また物差し状測距器具を使って物差しのように距離の測定も行うことができるものである。また、物差し状測距器具がレーザ測距装置本体に着脱自在に装着されたので、物差し状測距器具が必要ないときは取り外すことで軽量化が図れ、携帯性を向上できる。
【００３１】
加えて、本発明の請求項１の発明は、物差し状測距器具の測距向きとレーザ測距部の測距向きが同じか否かを判定すると共に物差し状測距器具が使用状態か否かを判定し、両者の判定がイエスとなる場合にだけ校正作業を行い、それ以外の場合には測距作業を行う切り替え制御手段を有するので、校正作業と測距作業の切り替えが単純な切り替え構造で実現できると共に校正作業と測距作業とを明確に分離した使用ができるものである。
【００３２】
また本発明の請求項２の発明は、請求項１において、物差し状測距器具は巻尺であるので、巻尺はコンパクトで本体構造を大きくすることなく校正機能を持たせることができ、携帯性を向上できるものである。
【００３３】
また本発明の請求項３の発明は、請求項１において、物差し状測距器具はスケールであり、レーザ測距装置本体にスケールの一端を差し込んでスケールを保持する手段を具備したので、スケールが必要でないときには簡単に取り外すことができ、軽量化できて携帯性を向上できるものである。
【００３４】
また本発明の請求項４の発明は、請求項１〜３のいずれか一項において、物差し状測距器具が９０°毎に角度を設定して固定可能にされたので、レーザ測距部と物差し状測距器具との両方を用いて測距することにより直角の位置関係にある測定面を測定できるものであり、また１つの装置で２点の距離を同時に測定することができるものである。
【００３５】
また本発明の請求項５の発明は、１〜３のいずれか一項において、レーザ測距部で測距する向きと１８０°反対の向きに物差し状測距器具を向けて固定できる構造にされたので、２つの測定面間の任意の位置から、これらの測定面間の距離を測定することができるものであり、また１つの装置で２点間の距離を測定することができるものである。
【００３６】
また本発明の請求項６の発明は、請求項１〜５のいずれか一項において、レーザ測距部からのレーザ光が垂直に当る板をレーザ光が当る位置とレーザ光が当らない位置とに位置変更可能なように物差し状測距器具に設けたので、物差し状測距器具に設けた板にレーザ光を当てて反射させることによりレーザの測距値の校正ができ、校正するときの基準面の有無や基準面までの距離に影響されずに校正作業を行うことができるものであり、また校正作業状態を保持した状態、測距作業中に一時的に校正作業を実行した状態からでも板にレーザ光が当らないように位置変更することで測距作業を連続的に行うことができるので、作業効率が向上するものである。
【００３７】
また本発明の請求項７の発明は、請求項６において、上記レーザ光が当る板が反射板であるので、投光部から照射したレーザ光を確実に反射して受光部に受光することで測距でき、レーザが照射される面の形状、色、材質に依存せずに校正作業を行うことができるものである。
【００３８】
また本発明の請求項８の発明は、請求項６において、受光レンズに着脱自在に装着し得るレンズカバーに反射面を備え、このレンズカバーがレーザ光の当る板になっているので、通常時にレンズカバーをレンズ保護用のカバーとして取り付けていることで携帯性の妨げにもならず、校正作業時にはレンズカバーの反射面を基準面として使用でき、測距作業時にはレンズカバーの反射面を測定面として使用できるため、作業性を携帯性を向上できるものであり、また測距作業時にレンズカバーの反射面を測定面とすることで測定面の形状、色、材質に依存しない正確な測距作業ができるものである。
【図面の簡単な説明】
【図１】本発明の一例のレーザ測距装置を示す斜視図である。
【図２】同上の構造を示すブロック図である。
【図３】（ａ）（ｂ）は同上の動作を説明するフローチャートである。
【図４】（ａ）（ｂ）は同上の校正作業を説明する斜視図である。
【図５】（ａ）（ｂ）は同上の校正作業を説明する斜視図である。
【図６】同上の他の例を示し、（ａ）はスケールを取り付けた状態の斜視図、（ｂ）は要部の断面図、（ｃ）はスケールを取り外した状態の斜視図、（ｄ）は（ｃ）の要部の断面図である。
【図７】同上の他の例を説明する斜視図である。
【図８】同上の他の例を説明する説明図である。
【図９】同上の他の例を説明する説明図である。
【図１０】同上の他の例を説明するフローチャートである。
【図１１】（ａ）（ｂ）（ｃ）は同上の他の例を説明する説明図である。
【図１２】同上の他の例を説明する斜視図である。
【図１３】（ａ）（ｂ）は同上の他の例の説明する斜視図である。
【図１４】従来例を説明する説明図である。
【符号の説明】
１投光部
２受光部
３演算部
４レーザ測距部
５物差し状測距器具
５ａ巻尺
５ｂスケール
６レーザ測距装置本体
７板
８受光レンズ
９レンズカバー[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a laser distance measuring device that calculates a distance to a distance measuring object by irradiating the distance measuring object with a laser, and more particularly to a laser distance measuring device having a function of calibrating a distance measured by a laser. Is.
[0002]
[Prior art]
Conventionally, a reference having a pair of plane mirrors a arranged in parallel so as to face each other as shown in FIG. 14 and a reference detection object b arranged near one end of the pair of plane mirrors a. Some have a distance setting tool c and have a function of calibrating the distance measured by the laser (see, for example, Patent Document 1).
[0003]
In this laser distance measuring device d, the laser distance from the laser distance measuring device d is applied to the reference detection object b with the reference distance setting tool c attached, and the distance measured by the laser and the distance set by the reference distance setting tool c. And the distance measured by the laser is correctly calibrated.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-271448
[Problems to be solved by the invention]
However, in the above-described conventional example, a reference distance setting tool c for setting the reference distance must be provided in order to calibrate the distance measured by the laser. Since the distance setting tool c gets in the way, there is a problem that it is difficult to handle because it has to be removed. The reference distance setting tool c has only a function of setting a reference distance when calibrating.
[0006]
The present invention has been made in view of the above points, and it is possible to calibrate the distance measured with a laser with a simple structure of providing a ruler-like distance measuring instrument and to be easy to handle. It is an object of the present invention to provide a laser distance measuring device that can be used for purposes other than calibration and that can be conveniently measured.
[0007]
[Means for Solving the Problems]
The laser distance measuring apparatus of the present invention for solving the above problems, the laser distance measuring apparatus body 6, receiving the light projecting unit 1 is irradiated with a laser beam, the reflected light from the measuring object to the range-finding object lasers and the light receiving section 2, and includes a formed laser distance measuring unit 4 from the arithmetic unit 3 which laser light to the light receiving portion 2 from the light projecting unit 1 calculates the distance to the object by the time it reaches the In the distance measuring device, a ruled distance measuring instrument 5 capable of measuring a distance like a ruler is detachably attached to the laser distance measuring apparatus main body 6, and a fixed distance measured by the ruled distance measuring instrument 5 and laser measurement are measured. Rutotomoni comprising means for calibrating the distance measurement value of the laser distance measuring unit 4 by the difference to calculate the difference between the distances measured by距部4 to the arithmetic unit 3, a distance measuring direction of the ruler-shaped distance measuring instrument 5 Determines whether the distance measuring direction of the laser distance measuring unit 4 is the same and measures Ranging device 5 determines whether the usage state, only do calibration work when both the determination is YES, in other cases, characterized in that it has a switching control means for performing distance measurement work .
[0008]
By using the laser distance measuring device having the above configuration, the laser distance measuring unit 4 compares the difference between the actual distance measured by the ruled distance measuring instrument 5 and the distance measured by the laser distance measuring unit 4 and measures the distance. Ranging value can be calibrated. At this time, in order to set the reference distance when calibrating with the ruled distance measuring instrument 5, the structure is simple and the handling can be facilitated as compared with the conventional reference distance setting tool for calibration. Further, the distance can be measured like a ruler using the ruled distance measuring instrument 5. In addition, when the measuring instrument 5 is not necessary, it can be reduced in weight and improved in portability, and the switching control means realizes a simple switching structure between the calibration work and the distance measuring work. In addition, the calibration work and the distance measurement work can be used clearly separated.
[0009]
It is also preferable that the ruled distance measuring instrument 5 is a tape measure 5a. The tape measure 5a as the ruled distance measuring instrument 5 is compact and can have a calibration function without increasing the structure of the main body, thereby improving portability.
[0010]
The ruled distance measuring instrument 5 is a scale 5b, and it is preferable that the laser distance measuring device main body 6 is provided with means for inserting one end of the scale 5b and holding the scale 5b. When the scale 5b is not necessary, it can be easily removed, the weight can be reduced, and portability can be improved .
[0011]
It is also preferable that the ruled distance measuring instrument 5 is configured to be fixed by setting an angle every 90 °. By measuring the distance using both the laser distance measuring unit 4 and the ruled distance measuring instrument 5, it is possible to measure a measurement surface having a right-angle positional relationship. Moreover, the distance of two points can be measured simultaneously with one apparatus.
[0012]
Further, it is also preferable that the structure is such that the ruled distance measuring instrument 5 can be fixed in a direction opposite to the direction in which the distance is measured by the laser distance measuring unit 4 by 180 °. The distance between these measurement surfaces can be measured from any position between the two measurement surfaces. The distance between two points can be measured with one device .
[0013]
Further, the plate-type distance measuring instrument 5 is provided such that the plate 7 on which the laser light from the laser distance measuring unit 4 hits vertically can be changed between a position where the laser light hits and a position where the laser light does not hit. It is also preferable to do. The distance measurement value of the laser can be calibrated by irradiating and reflecting the laser beam on the plate 7 provided on the ruled distance measuring instrument 5 without being affected by the presence or absence of the reference surface and the distance to the reference surface when calibrating. Calibration work can be performed. Further, even if the calibration work state is maintained or the calibration work is temporarily performed during the distance measurement work, the distance measurement work can be continuously performed by changing the position so that the laser beam does not hit the plate 7. This improves work efficiency.
[0014]
It is also preferable that the plate 7 to which the laser beam hits is a reflecting plate. The distance can be measured by reliably reflecting the laser beam irradiated from the light projecting unit 1 and receiving it on the light receiving unit 2, and the calibration work can be performed without depending on the shape, color, and material of the surface irradiated with the laser. it can.
[0015]
It is also preferable that a lens cover 9 that can be detachably attached to the light receiving lens 8 is provided with a reflecting surface, and the lens cover 9 is a plate on which the laser light strikes. Since the lens cover 9 is attached as a lens protection cover during normal operation, portability is not hindered, the reflection surface of the lens cover 9 can be used as a reference surface during calibration work, and the lens cover 9 can be used during distance measurement work. Since the reflective surface can be used as a measurement surface, workability and portability can be improved. In addition, by using the reflecting surface of the lens cover 9 as a measurement surface during distance measurement work, accurate distance measurement work independent of the shape, color, and material of the measurement surface can be performed.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1 and FIG. 2, the laser distance measuring device of the present invention measures the distance by the laser distance measuring unit 4 by incorporating the ruled distance measuring instrument 5 into the laser distance measuring device main body 6 having the laser distance measuring unit 4. A function to calibrate the distance measurement value is provided. The laser distance measuring unit 4 calculates the distance to the object by irradiating the object to be measured with the laser beam, and includes one light projecting unit 1 that irradiates the distance measuring object with the laser beam, It is composed of one light receiving unit 2 that receives reflected light from an object, and a calculation unit 3 that calculates the distance to the distance measuring object according to the time that the laser light reaches the light receiving unit 2 from the light projecting unit 1. Yes. The light receiving unit 2 is provided with a light receiving lens 8. The laser distance measuring device main body 6 is provided with a display unit 10 so that the distance measured by the laser distance measuring unit 4 and calculated is displayed in a display such as a digital display.
[0017]
The ruled distance measuring instrument 5 measures a distance like a ruler. In this example, the ruled distance measuring instrument 5 is formed by a tape measure 5a called a convex, and this tape measure 5a is attached to the laser distance measuring device main body 6. It has been incorporated. The tape measure 5 a can be measured by rewinding, but the distance measured by the tape measure 5 a is input to the calculation unit 3 of the laser distance measuring unit 4. For example, the length measured by the tape measure 5a can be automatically input to the calculation unit 3 by detecting the unwinded length of the tape measure 5a. At this time, the distance measured with the tape measure 5 a may be displayed on the display unit 10. The distance measured by the laser can be calibrated on the basis of the distance measured by the tape measure 5a as the ruled distance measuring instrument 5, and the arithmetic unit 3 is provided with a calibration means for calibrating the distance.
[0018]
When the distance measured by the laser distance measuring unit 4 is calibrated, first, the difference between the distance values is calculated according to the difference calculation flow as shown in FIG. 3A, and then the distance value is corrected as shown in FIG. Calibrate the laser ranging value with the flow. As shown in FIG. 4A, the distance to the reference surface 11 is measured using a tape measure 5a as a ruled distance measuring instrument 5 (ranging value 1), and a distance measuring method using a laser is used. ), The distance to the reference plane 11 is measured (distance value 2), and the difference D between the distance value 1 and the distance value 2 is calculated (difference D = distance value 1−distance value 2). ). As described above, after the difference calculation flow as shown in FIG. 3A is executed as the pre-processing to calculate the difference D, the laser measurement is performed in the distance value calibration flow as shown in FIG. 3B as follows. Calibrate the distance value. The distance is measured using a laser distance measurement method (range value A), and the difference D is added to the range value A and calibrated to the range value A ′.
[0019]
As described above, the distance measured by the laser distance measuring unit 4 can be calibrated by comparing the difference between the actual distance measured by the tape measure 5 a and the distance measured by the laser distance measuring unit 4. At this time, in order to set the reference distance when calibrating with the tape measure 5a, the structure is simple and the handling is easy as compared with the conventional reference distance setting tool for calibration. The distance can also be measured using the tape measure 5a itself. Further, the tape measure 5a as the ruled distance measuring instrument 5 is compact and can have a calibration function without increasing the main body structure, thereby improving portability.
[0020]
If the distance measurement value can be calibrated as described above, the reference distances from the laser distance measuring device body 6 to the reference surface 11 are set to L1 and L2, as shown in FIGS. Calibration can be performed at any distance. If the calibration work can be performed by arbitrarily setting the reference distance as described above, the calibration work can be performed without depending on the size of the work space.
[0021]
FIG. 6 shows another example. In the case of this example, a scale 5 b is used as the ruled distance measuring instrument 5. As shown in FIGS. 6C and 6D, the insertion groove 12 is provided on the lower surface side of the laser distance measuring device main body 6 and a spring 13 is provided in the insertion groove 12 to form a holding portion. As shown in (b), one end of the scale 5b is inserted into the insertion groove 12 and held by a spring 13, and the scale 5b is detachably attached so that it can be attached and detached by insertion and removal.
[0022]
When the scale 5b is mounted on the laser range finder main body 6, the laser range finder configured as described above can calibrate the range finder value in the same manner as in the above example using the length of the scale 5b as a reference distance. When the scale 5b is not necessary (when it is not calibrated), it can be easily removed, the weight can be reduced, and portability can be improved. The dimensions can also be measured using the scale 5b itself.
[0023]
FIG. 7 shows another example. In the case of this example, a tape measure 5a called a convex is used as the ruled distance measuring instrument 5, and this tape measure 5a is detachably attached to the laser distance measuring device main body 6. In this case, when the tape measure 5a is attached, the distance measurement value can be calibrated in the same manner as in the above example, and when the tape measure 5a as the ruled distance measuring instrument 5 is not necessary, the weight can be reduced by removing it. Can be improved.
[0024]
FIG. 8 shows another example. In the case of this example, the tape measure 5a as the ruled distance measuring instrument 5 is attached to the laser distance measuring device main body 6 so that it can rotate 360 °, and the angle can be set and fixed every 90 °. Yes. In this manner, for example, the distance to the first measurement surface 15a is measured using the laser distance measuring unit 4 as indicated by the arrow α, and the distance to the second measurement surface 15b is indicated using the tape measure 5a as indicated by the arrow β. Can be measured. By measuring the distance using both the laser distance measuring unit 4 and the tape measure 5a, it is possible to measure a measurement surface having a perpendicular positional relationship. Moreover, the distance of two points can be measured simultaneously with one apparatus.
[0025]
FIG. 9 shows another example. In the case of this example, in addition to fixing the tape measure 5a in the same direction as the direction of distance measurement by the laser distance measurement unit 4, the tape measure 5a is oriented 180 ° opposite to the direction of distance measurement by the laser distance measurement unit 4. Can be fixed. In a state where the tape measure 5a is fixed in the same direction as the direction of distance measurement by the laser distance measuring unit 4, the distance value measured by the laser can be calibrated as in the above example. Further, when the tape measure 5a is fixed in a direction 180 ° opposite to the direction in which the laser distance measurement unit 4 measures the distance, the laser distance measurement unit 4 measures the distance γ to the first measurement surface 15a as indicated by the arrow α. The distance δ to the second measurement surface 15b facing the first measurement surface 15a can be measured with the tape measure 5a as shown by the arrow β, and thereby the distance between the first and second measurement surfaces 15a and 15b can be measured. The distance ε (measurement surface distance ε = distance γ + distance δ + tape body length η) can be measured. Thereby, the distance between these measurement surfaces can be measured from an arbitrary position between the two measurement surfaces. The distance between two points can be measured with one device.
[0026]
FIG. 10 shows another example. In the case of this example, there is a switching control means that enables calibration work only when the ruled distance measuring instrument 5 such as the tape measure 5a is oriented in the same direction as the laser light emitting direction of the laser distance measuring unit 4. As shown in FIG. 10, it is determined whether the attachment position angle of the ruled distance measuring instrument 5 is 0 degrees (the distance measuring direction of the ruled distance measuring instrument 5 is the same as the distance measuring direction of the laser distance measuring unit 4). It is possible to determine whether or not the ruled distance measuring instrument 5 is in use, and if both are YES, the calibration process is performed, and otherwise, the distance measurement process can be switched. With this configuration, the calibration work and the distance measurement work can be switched with a simple switching structure, and the calibration work and the distance measurement work can be used in a clearly separated manner.
[0027]
FIG. 11 shows another example. In the case of this example, the ruled distance measuring instrument 5 is a tape measure 5a, and a plate 7 is provided as a reference surface on which the laser strikes the tip of the tape measure 5a. When the plate 7 is tilted horizontally as shown in FIG. 11 (a), when standing upright as shown in FIG. 11 (b), the laser beam from the laser distance measuring unit 4 hits vertically, and in this state, laser measurement is performed. The distance value can be calibrated. Further, from the state where the plate 7 is set up vertically as shown in FIG. 11B, it can be directed parallel to the direction of the laser beam as shown in FIG. 11C. The irradiated distance measurement work can be performed. In this way, the calibration operation can be performed without being affected by the presence or absence of the reference surface and the distance to the reference surface when calibrating. Further, even if the calibration work state is maintained or the calibration work is temporarily performed during the distance measurement work, the distance measurement work can be continuously performed by changing the position so that the laser beam does not hit the plate 7. This improves work efficiency.
[0028]
FIG. 12 shows another example. As in the above example, the plate 7 on which the laser beam hits when standing upright is formed by the reflecting plate 7a. When formed by the reflecting plate 7a having a diffusing surface, the laser beam emitted from the light projecting unit 1 can be reliably reflected by the reflecting plate 7a and received by the light receiving unit 2, and the laser beam can be irradiated. The calibration work can be performed without depending on the shape, color, and material of the surface.
[0029]
FIG. 13 shows another example. A lens cover 9 is detachably attached to the light receiving lens 8 to protect the light receiving lens 8 as shown in FIG. 13A. The lens cover 9 has a reflecting surface on the inner surface. When the lens cover 9 is removed, the lens cover 9 can be disposed or attached to the tip of the tape measure 5a as shown in FIG. 13B, or can be disposed on the measurement surface. In this way, the lens cover 9 is normally attached as a lens protection cover so that portability is not hindered, and the reflection surface of the lens cover 9 can be used as a reference surface during calibration work. Sometimes the reflective surface of the lens cover 9 can be used as a measurement surface, so that workability and portability can be improved. In addition, by using the reflecting surface of the lens cover 9 as a measurement surface during distance measurement work, accurate distance measurement work independent of the shape, color, and material of the measurement surface can be performed.
[0030]
【The invention's effect】
According to the first aspect of the present invention, a laser distance measuring device main body includes a light projecting unit that irradiates a distance measuring object with laser light, a light receiving unit that receives reflected light from the distance measuring object, and a light projecting unit. In a laser distance measuring device comprising a laser distance measuring unit composed of a calculation unit that calculates the distance to a distance measuring object according to the time at which the laser beam reaches the light receiving unit, the distance is measured like a ruler. A removable measuring instrument is removably attached to the laser measuring instrument body, and the difference between the fixed distance measured by the measuring instrument and the distance actually measured by the laser measuring unit is calculated and the difference is calculated. Since the calculation unit is equipped with a means for calibrating the distance measurement value of the laser distance measurement unit, the difference between the actual distance measured by the ruled distance measuring instrument and the distance measured by the laser distance measurement unit is compared and laser measurement is performed. The distance measurement value measured at the distance section can be calibrated. At this time, in order to set the reference distance when calibrating with a ruled distance measuring instrument, the structure is simpler and easier to handle than the dedicated reference distance setting tool for conventional calibration. In addition, the distance can be measured like a ruler using a ruled distance measuring instrument. Further, since the ruled distance measuring instrument is detachably attached to the laser distance measuring device main body, when the ruled distance measuring instrument is not necessary, the weight can be reduced by removing it and the portability can be improved.
[0031]
In addition, the invention of claim 1 of the present invention determines whether or not the distance measuring direction of the ruled distance measuring instrument and the distance measuring direction of the laser distance measuring unit are the same, and whether or not the ruled distance measuring instrument is in use. Since there is a switching control means that performs calibration work only when both judgments are YES, and otherwise performs ranging work, switching between calibration work and ranging work is simple switching The structure can be realized and the calibration work and the distance measurement work can be used in a clearly separated manner.
[0032]
Further, the invention of claim 2 of the present invention is that, since the ruled distance measuring instrument is a tape measure in claim 1, the tape measure is compact and can have a calibration function without increasing the structure of the main body, and is portable. It can be improved.
[0033]
According to a third aspect of the present invention, in the first aspect, the ruled distance measuring instrument is a scale, and includes means for holding the scale by inserting one end of the scale into the laser distance measuring device main body. When it is not necessary, it can be easily removed, it can be reduced in weight, and portability can be improved .
[0034]
According to a fourth aspect of the present invention, in any one of the first to third aspects, the ruled distance measuring instrument is configured to be fixed by setting an angle every 90 °. It is possible to measure a measurement surface in a right-angled positional relationship by measuring with both a ruled distance measuring instrument and to measure the distance of two points simultaneously with one device. .
[0035]
Further, the invention of claim 5 of the present invention is the structure according to any one of 1 to 3, wherein the ruled distance measuring instrument can be fixed in a direction 180 ° opposite to the direction in which the distance is measured by the laser distance measuring unit. Therefore, the distance between these measurement surfaces can be measured from any position between the two measurement surfaces, and the distance between two points can be measured with one device. .
[0036]
Further, the invention of claim 6 of the present invention is that, in any one of claims 1 to 5, a plate on which the laser beam from the laser distance measuring unit vertically hits a position where the laser beam hits and a position where the laser beam does not hit Because it is provided in the ruled range finder so that the position can be changed, the laser distance value can be calibrated by reflecting the laser beam on the plate provided in the ruled range finder. The calibration work can be performed without being affected by the presence or absence of the reference surface and the distance to the reference surface, and the calibration work state is maintained and the calibration work is temporarily executed during the distance measurement work. However, since the distance measuring operation can be continuously performed by changing the position so that the laser beam does not hit the plate, the working efficiency is improved.
[0037]
According to a seventh aspect of the present invention, in the sixth aspect , the plate to which the laser beam strikes is a reflection plate, so that the laser beam irradiated from the light projecting unit is reliably reflected and received by the light receiving unit. The distance can be measured and the calibration work can be performed without depending on the shape, color, and material of the surface irradiated with the laser.
[0038]
According to an eighth aspect of the present invention, in the sixth aspect, the lens cover that can be detachably attached to the light-receiving lens is provided with a reflecting surface, and the lens cover is a plate on which the laser beam strikes. Since the lens cover is attached as a lens protection cover, it does not hinder portability, the reflection surface of the lens cover can be used as a reference surface during calibration work, and the reflection surface of the lens cover is used as a measurement surface during distance measurement work. As a result, it is possible to improve workability and portability, and by using the reflective surface of the lens cover as the measurement surface during distance measurement work, accurate distance measurement work that does not depend on the shape, color, or material of the measurement surface It is something that can be done.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a laser range finder according to an example of the present invention.
FIG. 2 is a block diagram showing the structure of the above.
FIGS. 3A and 3B are flowcharts for explaining the operation described above.
FIGS. 4A and 4B are perspective views for explaining the calibration work described above.
FIGS. 5A and 5B are perspective views for explaining the calibration work according to the embodiment.
6 shows another example of the above, (a) is a perspective view with a scale attached, (b) is a cross-sectional view of the main part, (c) is a perspective view with a scale removed, (d) ) Is a cross-sectional view of the main part of (c).
FIG. 7 is a perspective view for explaining another example of the above.
FIG. 8 is an explanatory diagram for explaining another example of the above.
FIG. 9 is an explanatory diagram for explaining another example of the above.
FIG. 10 is a flowchart illustrating another example of the above.
FIGS. 11A, 11B, and 11C are explanatory diagrams for explaining another example of the above. FIGS.
FIG. 12 is a perspective view for explaining another example of the above.
FIGS. 13A and 13B are perspective views illustrating another example of the same.
FIG. 14 is an explanatory diagram for explaining a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Light projection part 2 Light reception part 3 Calculation part 4 Laser distance measurement part 5 Ruler-like distance measuring instrument 5a Tape measure 5b Scale 6 Laser distance measuring device main body 7 Plate 8 Light reception lens 9 Lens cover

Claims

A light projecting unit that irradiates a laser beam to a distance measuring object, a light receiving unit that receives reflected light from the distance measuring object, and a time for the laser light to reach the light receiving unit from the light projecting unit In a laser range finder comprising a laser range finder configured to calculate a distance to an object to be measured by a laser, a measure finder that can measure the distance like a yardstick is measured by laser measurement. Attached to the distance measuring device detachably , calculates the difference between the fixed distance measured by the ruled distance measuring instrument and the distance actually measured by the laser distance measuring unit, and calibrates the distance measured value of the laser distance measuring unit based on the difference determining Rutotomoni, whether ruler shaped distance measuring instrument or the use state with the distance measuring direction a distance measuring direction of the laser distance measuring unit of the ruler-shaped distance measuring instrument to determine whether the same comprises a means for calculating portion Only if the judgment is yes. There, a laser distance measuring apparatus characterized by having a switching control means for performing ranging operations otherwise.

2. The laser distance measuring device according to claim 1, wherein the ruled distance measuring instrument is a tape measure.

2. The laser distance measuring device according to claim 1, wherein the ruled distance measuring instrument is a scale, and includes means for holding the scale by inserting one end of the scale into the laser distance measuring device main body.

The laser distance measuring device according to any one of claims 1 to 3, wherein the ruled distance measuring instrument is fixed by setting an angle every 90 °.

The laser distance measuring device according to any one of claims 1 to 3, wherein the laser distance measuring device has a structure in which the ruled distance measuring device can be fixed in a direction opposite to the direction measured by the laser distance measuring unit by 180 °. apparatus.

2. A ruled distance measuring instrument according to claim 1, wherein a plate on which the laser beam from the laser distance measuring unit hits vertically is provided in the ruled distance measuring instrument so that the position of the plate can be changed between a position where the laser beam hits and a position where the laser beam does not hit. The laser range finder as described in any one of -5.

7. The laser distance measuring device according to claim 6, wherein the plate to which the laser beam hits is a reflecting plate.

7. The laser distance measuring device according to claim 6, wherein a lens cover that can be detachably attached to the light receiving lens is provided with a reflecting surface, and the lens cover is a plate on which the laser light strikes.