JPS61155909A - Apparatus for measuring distance - Google Patents

Apparatus for measuring distance

Info

Publication number
JPS61155909A
JPS61155909A JP27990084A JP27990084A JPS61155909A JP S61155909 A JPS61155909 A JP S61155909A JP 27990084 A JP27990084 A JP 27990084A JP 27990084 A JP27990084 A JP 27990084A JP S61155909 A JPS61155909 A JP S61155909A
Authority
JP
Japan
Prior art keywords
irradiation
light
light emitting
distance
measured
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP27990084A
Other languages
Japanese (ja)
Inventor
Masafumi Machida
町田　雅史
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Machida Endoscope Co Ltd
Original Assignee
Machida Endoscope Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Machida Endoscope Co Ltd filed Critical Machida Endoscope Co Ltd
Priority to JP27990084A priority Critical patent/JPS61155909A/en
Publication of JPS61155909A publication Critical patent/JPS61155909A/en
Pending legal-status Critical Current

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  • Length Measuring Devices By Optical Means (AREA)
  • Measurement Of Optical Distance (AREA)

Abstract

PURPOSE:To measure the distance up to an object by the difference between the brightnesses of two irradiation parts, by irradiating the object with light from two irradiation parts of which the irradiation positions are shifted before and behind in an irradiation direction and receiving both reflected light beams by a light receiving element. CONSTITUTION:A reference surface 3 is irradiated with light beams from a first irradiation part 1 and a second irradiation part 2 and the brightness from the first irradiation part 1 on the reference surface is preliminarily made equal to that from the second irradiation part 2. For example, it is assumed that a surface 4 to be measured was present at a place separated by 1/2 the distance from the first irradiation part 1 to the reference surface 3, the brightness of the surface 4 to be measured by the irradiation from the first irradiation part 1 comes to 4 times that of the reference surface 3 and the brightness by the irradiation from the second irradiation part 2 comes to 4 times or more. Then, by calculating the difference between the brightnesses between the reflected light A of the light from the first irradiation part 1 and the reflected light B of the light from the second irradiation part 2 by a light receiving element, the distance up to the surface 4 to be measured can be calculated.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、照射位置を照射方向にずらした２つの照射部
よシ対象物に光を照射することにより対象物までの距離
を測る距離測定装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is a distance measurement method that measures the distance to an object by irradiating light onto the object through two irradiation units whose irradiation positions are shifted in the irradiation direction. Regarding equipment.

〔従来の技術および問題点〕[Conventional technology and problems]

例えば、医療における内視鏡観察において、観察部位ま
での距離や患部の起伏状態など立体的状態がわかシにく
い欠点がある。凍た、産業用ロボットにおいては、物を
識別する眼の機能を有していないために、高機能性、高
信頼性を有するロボットとはならなかった。従って、医
療や工業ロボットおよび他の産業において、対象物まで
の距離や対象物の前後位置が具体的数値として測定され
ることが要求されている。For example, in medical endoscopic observation, there is a drawback that it is difficult to understand the three-dimensional state, such as the distance to the observation site and the ups and downs of the affected area. Since industrial robots do not have the eye function to identify objects, they have not been able to be highly functional and reliable robots. Therefore, in medical treatment, industrial robots, and other industries, it is required to measure the distance to an object and the front and rear positions of the object as concrete values.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は、照射位置を照射方向に同一またはそれに近い
光軸上で前後にずらした２つの照射部よシ、対象物に光
を照射し、その両反射光を受光素子で受光することによ
りその明るさの差によシ対象物までの距離を測ることを
特徴とする。The present invention irradiates light onto an object using two irradiation sections whose irradiation positions are shifted back and forth on the same or near optical axis in the irradiation direction, and both reflected lights are received by a light receiving element. It is characterized by measuring the distance to an object based on the difference in brightness.

〔実施例〕〔Example〕

以下に本発明の一実施例を説明する。第１図は本発明の
照射状態を示す側面図、第２図は同平面図である。図に
おいて１は第１射光部、２は第２射光部であシ、第１射
光部１と第２射光部２は同一またはそれに近い光軸で同
一光質である。An embodiment of the present invention will be described below. FIG. 1 is a side view showing the irradiation state of the present invention, and FIG. 2 is a plan view thereof. In the figure, 1 is a first light emitting part, 2 is a second light emitting part, and the first light emitting part 1 and the second light emitting part 2 have the same or close optical axis and the same light quality.

このようにした第１射光部１と第２射光部２から光を基
準面３に照射して基準面３の第１射光部１からの明るさ
と第２射光部２からの明るさを等しくしておく。The reference surface 3 is irradiated with light from the first light emitting section 1 and the second light emitting section 2 in this manner, so that the brightness from the first light emitting section 1 and the brightness from the second light emitting section 2 on the reference surface 3 are made equal. I'll keep it.

そこで、例えば被測定面４が第１射光部１から基準面３
までの距離ｌの１／２の所にあったとすると、被測定面
４の第１射光部１からの照射による明るさは基準面３の
明るさの４倍になり、第２射光部２からの照射による明
るさは４倍以上となる。Therefore, for example, when the surface to be measured 4 is
If the measured surface 4 is located at 1/2 of the distance l from the first light emitting section 1, the brightness of the measured surface 4 from the first light emitting section 1 will be four times the brightness of the reference surface 3, and The brightness due to irradiation is more than 4 times.

従って、上記の第１射光部１と第２射光部２からの被測
定面４までの距離と明るさの関係をグラフにすると第２
図に示すようになる。これにより第１射光部１からの光
の反射光Ａと第２射光部２からの光′の反射光Ｂの明る
さの差Ｃを受光素子によシ求めることによシ被測定面４
までの距離が算出できることになる。Therefore, if the relationship between the brightness and the distance from the first light emitting section 1 and the second light emitting section 2 to the surface to be measured 4 is graphed, the second
The result will be as shown in the figure. As a result, the difference C in brightness between the reflected light A of the light from the first light emitting part 1 and the reflected light B of the light 'from the second light emitting part 2 is determined by the light receiving element, and the measured surface 4
This allows the distance to be calculated.

なお、上記実施例においては基準面３の明るさを第１射
光部１からの照射と第２射光部２からの照射を同一とし
たことによシ同一点となっているが明るさを変えた場合
には示牟自４必ｉそのグラフを平行移動すれば第３図の
グラフと同一となる。In the above embodiment, the brightness of the reference surface 3 is the same for the irradiation from the first light emitting section 1 and the irradiation from the second light emitting section 2, so that the same point is obtained, but the brightness can be changed. In this case, if the graph is translated in parallel, it will become the same as the graph in FIG.

〔発明の効果〕〔Effect of the invention〕

以上説明した本発明によると、第１射光部と第２射光部
を同一光軸で同一光質とし、被測定面を照射することに
より、被測定面の明るさの差を知って被測定面までの距
離を測定することができるものであシ、装置が大型にな
らずしかも精度の高い測定が可能であって工業用および
医学用の内視鏡に装着することにより有効な測定装置と
なる。According to the present invention described above, the first light emitting section and the second light emitting section have the same optical axis and the same light quality, and by irradiating the surface to be measured, the difference in brightness of the surface to be measured is known and the surface to be measured is The device is capable of measuring the distance to the object, does not require a large device, and is capable of highly accurate measurement, making it an effective measuring device when attached to industrial and medical endoscopes. .

また、第１射光部と第２射光部からの光を交番に照射す
ることにより基準面と被測定面の色の違いがあってもそ
の距離を測定することができ、また両光の波長を変えて
も同様の結果が得られる。In addition, by alternately irradiating the light from the first light emitting part and the second light emitting part, the distance can be measured even if there is a difference in color between the reference surface and the measured surface, and the wavelength of both lights can be measured. Even if you change it, you will get the same result.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は照射状態を示す側面図、第２図は同平面図、第
３図は反射光の状態を示すグラフである。 １・・・第１射光部　２・・・第２射光部特許出願人　
株式会社町田製作所 代理人　弁理士　金　倉　喬　　二 ＠１；FIG. 1 is a side view showing the irradiation state, FIG. 2 is a plan view of the same, and FIG. 3 is a graph showing the state of reflected light. 1...First light emitting part 2...Second light emitting part Patent applicant
Machida Manufacturing Co., Ltd. Agent Patent Attorney Takashi Kanakura @1;

Claims (1)

【特許請求の範囲】[Claims] １、第１射光部と第２射光部とを同一またはそれに近い
光軸でしかも同一光質として照射し、その両者の反射光
を受光素子で明るさの差を検出することにより被測定面
までの距離を測定することを特徴とする距離測定装置。1. The first light emitting part and the second light emitting part are irradiated with the same or close optical axis and with the same light quality, and the reflected light from both is detected by the light receiving element to reach the surface to be measured. A distance measuring device characterized by measuring the distance between.
JP27990084A 1984-12-28 1984-12-28 Apparatus for measuring distance Pending JPS61155909A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27990084A JPS61155909A (en) 1984-12-28 1984-12-28 Apparatus for measuring distance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27990084A JPS61155909A (en) 1984-12-28 1984-12-28 Apparatus for measuring distance

Publications (1)

Publication Number Publication Date
JPS61155909A true JPS61155909A (en) 1986-07-15

Family

ID=17617482

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27990084A Pending JPS61155909A (en) 1984-12-28 1984-12-28 Apparatus for measuring distance

Country Status (1)

Country Link
JP (1) JPS61155909A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63186107A (en) * 1986-11-04 1988-08-01 ハネウエル・インコーポレーテツド Method of measuring distance up to separating body and distance measuring device
JPS63233312A (en) * 1987-03-20 1988-09-29 Univ Osaka Method for measuring distance using reflected light from object to be measured
JPH0440314A (en) * 1990-06-05 1992-02-10 Stanley Electric Co Ltd Optical measuring instrument
JPH0493706A (en) * 1990-08-10 1992-03-26 Stanley Electric Co Ltd Optical measuring apparatus
JPH04104005A (en) * 1990-08-24 1992-04-06 Stanley Electric Co Ltd Optical measuring apparatus
US6538751B2 (en) 2000-02-16 2003-03-25 Fuji Photo Film Co., Ltd. Image capturing apparatus and distance measuring method
US6724490B2 (en) 2000-06-12 2004-04-20 Fuji Photo Film Co., Ltd. Image capturing apparatus and distance measuring method
US6741082B2 (en) 2000-09-26 2004-05-25 Fuji Photo Film Co., Ltd. Distance information obtaining apparatus and distance information obtaining method
US9361528B2 (en) 2013-02-28 2016-06-07 Fujifilm Corporation Vehicle-to-vehicle distance calculation apparatus and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS567001A (en) * 1979-06-29 1981-01-24 West Electric Co Ltd Distance measuring apparatus
JPS56103310A (en) * 1980-01-22 1981-08-18 Nippon Telegr & Teleph Corp <Ntt> System for controlling distance from target by using reflection type optical sensor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS567001A (en) * 1979-06-29 1981-01-24 West Electric Co Ltd Distance measuring apparatus
JPS56103310A (en) * 1980-01-22 1981-08-18 Nippon Telegr & Teleph Corp <Ntt> System for controlling distance from target by using reflection type optical sensor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63186107A (en) * 1986-11-04 1988-08-01 ハネウエル・インコーポレーテツド Method of measuring distance up to separating body and distance measuring device
JPS63233312A (en) * 1987-03-20 1988-09-29 Univ Osaka Method for measuring distance using reflected light from object to be measured
JPH0440314A (en) * 1990-06-05 1992-02-10 Stanley Electric Co Ltd Optical measuring instrument
JPH0493706A (en) * 1990-08-10 1992-03-26 Stanley Electric Co Ltd Optical measuring apparatus
JPH04104005A (en) * 1990-08-24 1992-04-06 Stanley Electric Co Ltd Optical measuring apparatus
US6538751B2 (en) 2000-02-16 2003-03-25 Fuji Photo Film Co., Ltd. Image capturing apparatus and distance measuring method
US6724490B2 (en) 2000-06-12 2004-04-20 Fuji Photo Film Co., Ltd. Image capturing apparatus and distance measuring method
US6819436B2 (en) 2000-06-12 2004-11-16 Fuji Photo Film Co., Ltd. Image capturing apparatus and distance measuring method
US6741082B2 (en) 2000-09-26 2004-05-25 Fuji Photo Film Co., Ltd. Distance information obtaining apparatus and distance information obtaining method
US9361528B2 (en) 2013-02-28 2016-06-07 Fujifilm Corporation Vehicle-to-vehicle distance calculation apparatus and method

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