JPH07110218A - Instrument for measuring diameter of object - Google Patents
Instrument for measuring diameter of objectInfo
- Publication number
- JPH07110218A JPH07110218A JP25461693A JP25461693A JPH07110218A JP H07110218 A JPH07110218 A JP H07110218A JP 25461693 A JP25461693 A JP 25461693A JP 25461693 A JP25461693 A JP 25461693A JP H07110218 A JPH07110218 A JP H07110218A
- Authority
- JP
- Japan
- Prior art keywords
- diameter
- tree
- bright
- measuring
- dark portions
- 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
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、円柱状対象物たとえ
ば森林に実際に生えている樹木の直径を、遠隔的に非接
触で測定する装置であって、とくに三角測量の原理に基
づいて距離測定する方式をとり、高制度が得られ、かつ
小形，軽量化が図れる対象物の直径測定装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for remotely measuring the diameter of a cylindrical object, for example, a tree actually growing in a forest, in a non-contact manner, and particularly based on the principle of triangulation. The present invention relates to a device for measuring the diameter of an object, which adopts a measuring method, can obtain high accuracy, and can be made small and lightweight.
【０００２】[0002]
【従来の技術】従来、樹木の直径（以下、樹径という）
の測定方法として、一つには、大形のノギスを用いる方
法が知られている。この方法においては、測定者が森林
でノギスにより樹径を測定した後、そのデータを手書き
によって帳票化し、さらに事務所でコンピュータなどに
入力して、集計処理をおこなう。二つには、電子ノギス
を用いて樹径を測定し記憶させ、事務所でコンピュータ
と接続してデータの集計処理をおこなう。2. Description of the Related Art Conventionally, tree diameter (hereinafter referred to as tree diameter)
As a measuring method of, one is known to use a large caliper. In this method, the measurer measures the tree diameter with vernier calipers in the forest, hand-writes the data, and inputs it to a computer or the like at the office to perform the aggregation process. Secondly, the tree diameter is measured and stored using an electronic caliper, and the data is collected by connecting to a computer at the office.
【０００３】[0003]
【発明が解決しようとする課題】大形のノギスを用いる
方法では、現場での帳票作成や、事務所でのデータ入力
など、データ処理に伴う作業時間が多くかかるという問
題があった。電子ノギスを用いる方法では、電子ノギス
が重いので、測定者に対する負担が大きく、測定効率を
低下させるという問題があった。また共通に言えること
は、いずれの方法も原理上、樹径と同程度の大きさのノ
ギスが必要であるから、持ち運びには不都合で、さら
に、測定の際には樹木と接触する必要があるから、とく
に斜面上の樹木などの測定のとき不便である。The method using a large caliper has a problem that it takes a lot of work time for data processing, such as creating a form on the spot and inputting data in an office. In the method using the electronic caliper, since the electronic caliper is heavy, there is a problem that the burden on the measurer is large and the measurement efficiency is reduced. In addition, it is common to say that all methods require a caliper of the same size as the diameter of the tree, which makes it inconvenient to carry, and it is necessary to make contact with trees during measurement. Therefore, it is inconvenient especially when measuring trees on a slope.
【０００４】この発明が解決すべき課題は、従来の技術
が持つ以上の問題点を解消し、円柱状対象物たとえば森
林に実際に生えている樹木の直径を、遠隔的に非接触で
高精度に求めることが可能で、かつ小形，軽量化が図れ
る対象物の直径測定値を提供することにある。The problem to be solved by the present invention is to solve the above problems of the prior art and to accurately measure the diameter of a cylindrical object, for example, a tree actually growing in a forest, in a remote and non-contact manner. The object is to provide a measured value of the diameter of an object that can be obtained in a compact and lightweight manner.
【０００５】[0005]
【課題を解決するための手段】請求項１に係る対象物の
直径測定装置は、円柱状対象物の直径を遠隔的に測定す
る装置であって、結像レンズを前置した光センサアレイ
の２個が対象物に対向して並設されてなる検出部と；そ
の各光センサアレイから、その上に結像する、対象物表
面に設定された少なくとも３個の位置検出用明暗部分の
各像の位置に応じて出力される信号に基づき、各位置検
出用明暗部分と検出部との相対位置をそれぞれ求める位
置演算部と；この位置演算部によって求められた各相対
位置に係るデータに基づき、対象物の直径を求める直径
演算部と；を備える。An object diameter measuring device according to claim 1 is a device for remotely measuring the diameter of a cylindrical object, which is an optical sensor array in front of which an imaging lens is placed. Two detecting units arranged side by side facing the object; each of at least three light-dark parts for position detection set on the surface of the object, which are imaged on the respective photosensor arrays. A position calculation unit that calculates the relative position between each of the bright and dark portions for position detection and the detection unit based on the signal output according to the position of the image; and based on the data related to each relative position calculated by this position calculation unit. A diameter calculation unit for obtaining the diameter of the object.
【０００６】請求項２に係る対象物の直径測定装置は、
請求項１に記載の装置において、位置検出用明暗部分
が、測定側から放射状にかつ隣り合う同士が一定中心角
度で対象物に投射された３個の、対象物の軸線に長手方
向が平行なスリット光による対象物表面の照射部分であ
る。請求項３に係る対象物の直径測定装置は、請求項１
または２に記載の装置において、対象物が、樹木であ
る。An object diameter measuring device according to claim 2 is
The device according to claim 1, wherein the position detecting bright and dark portions are three in a longitudinal direction parallel to the axis of the object, which are radially projected from the measurement side and adjacent to each other are projected onto the object at a constant center angle. It is the irradiation portion of the surface of the object by the slit light. The object diameter measuring device according to claim 3 is the device according to claim 1.
Alternatively, in the apparatus described in 2, the object is a tree.
【０００７】[0007]
【作用】請求項１ないし３のいずれかの項に係る対象物
の直径測定装置では、位置演算部によって、検出部の各
光センサアレイから、その上に結像する、対象物表面に
設定された少なくとも３個の位置検出用明暗部分の各像
の位置に応じて出力される信号に基づき、各位置検出用
明暗部分と検出部との各相対位置が求められる。次に、
直径演算部によって、位置演算部によって求められた各
相対位置に係るデータに基づき、対象物の直径が求めら
れる。In the diameter measuring device for an object according to any one of claims 1 to 3, the position calculating unit sets the image on each of the photosensor arrays of the detecting unit on the surface of the object. Based on the signals output according to the positions of the respective images of the at least three position detecting bright and dark portions, the relative positions of the position detecting bright and dark portions and the detection unit are obtained. next,
The diameter calculation unit calculates the diameter of the object based on the data relating to each relative position calculated by the position calculation unit.
【０００８】とくに請求項２に係る対象物の直径測定装
置では、位置検出用明暗部分が、測定側から放射状に、
かつ隣り合う同士が一定中心角度で対象物に投射された
３個の、対象物の軸線に長手方向が平行なスリット光に
よる対象物表面の照射部分である。したがって、その各
照射部分が、位置検出部による相対位置の検出に適切な
ように、遠隔的，非接触に、かつ自由に設定可能であ
る。Particularly, in the object diameter measuring device according to the second aspect, the position detecting bright and dark portions are radially arranged from the measuring side.
Further, it is an irradiation part on the surface of the object with three slit lights whose adjacent directions are projected onto the object at a constant center angle and whose longitudinal direction is parallel to the axis of the object. Therefore, each of the irradiation portions can be set remotely, in a non-contact manner, and freely so as to be suitable for detecting the relative position by the position detection unit.
【０００９】[0009]
【実施例】この発明に係る対象物の直径測定装置の実施
例について、以下に図を参照しながら説明する。図１は
実施例の構成を示すブロック図である。図１において、
対象物としての樹木９に対向して、結像レンズ１を前置
した光センサアレイ３と、結像レンズ２を前置した光セ
ンサアレイ４とが並設される。なお、各結像レンズ１，
２と、各光センサアレイ３，４とは、それぞれ同じもの
である。５は位置演算回路で、詳しく後述する各光セン
サアレイ３，４からの信号に基づいて、樹木９の正面側
に選定，設定された位置検出に適する明暗部Ｍ1,Ｍ2,Ｍ
3 の、各結像レンズ１，２の中央位置を原点としたとき
の位置座標を演算する。明暗部分Ｍ1,Ｍ2,Ｍ3 は、位置
検出のために樹木９の適切な箇所に選定，設定される特
徴的な３箇所以上の明暗部分で、たとえば垂直方向のス
リット光としてのレーザ光ビームの３個を一定中心角で
放射状に樹木９の表面に投射したときの３本の細帯状照
射部分である。さらに簡単には、３本の白い細帯状の印
を明暗部分として付けることもある。また、明暗部分を
細帯状にする理由は、一対の光センサアレイ３，４で適
正方向に狙いやすくするためである。一般に、光ビーム
による照射部分を位置検出用明暗部分にするのは、適切
な箇所が、遠隔的，非接触に、かつ自由に設定できるた
めである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the object diameter measuring apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the embodiment. In FIG.
An optical sensor array 3 with an imaging lens 1 in front and an optical sensor array 4 with an imaging lens 2 in front are juxtaposed to face a tree 9 as an object. Each imaging lens 1,
2 and the photosensor arrays 3 and 4 are the same. Reference numeral 5 denotes a position calculation circuit, which is based on signals from the respective photosensor arrays 3 and 4 described in detail below, and which is suitable for position detection selected and set on the front side of the tree 9 is a dark / light portion M 1 , M 2 , M.
The position coordinates when the center position of each of the imaging lenses 1 and 2 of 3 is set as the origin is calculated. The bright and dark portions M 1 , M 2 and M 3 are characteristic three or more bright and dark portions that are selected and set at appropriate locations on the tree 9 for position detection. For example, laser light as vertical slit light. These are three strip-shaped irradiation portions when three beams are radially projected on the surface of the tree 9 at a constant central angle. More simply, three white strip-shaped marks may be added as light and dark portions. Further, the reason why the bright and dark portions are formed in a strip shape is that the pair of photosensor arrays 3 and 4 can be easily aimed in an appropriate direction. In general, the light beam irradiation portion is used as the position detecting bright and dark portion because an appropriate portion can be set remotely, in a non-contact manner, and freely.
【００１０】６は樹径演算回路で、各光センサアレイ
３，４の出力によって、詳しく後述する樹木表面の３個
以上の明暗部分の位置を検出する。７は樹径Ｄに係るデ
ータを格納するメモリで、破線表示したコンピュータ８
と接続される。ところで、ここでは位置演算回路５，樹
径演算回路６は、いずれもハードウェアとして表現した
が、実際にはソフトウェア、つまりマイクロコンピュー
タのプログラムとして構成される。A tree diameter calculation circuit 6 detects the positions of three or more bright and dark portions on the surface of the tree, which will be described in detail later, based on the outputs of the optical sensor arrays 3 and 4. Reference numeral 7 is a memory for storing data relating to the tree diameter D, and a computer 8 indicated by a broken line
Connected with. By the way, although the position calculation circuit 5 and the tree diameter calculation circuit 6 are both represented as hardware here, they are actually configured as software, that is, as a program of a microcomputer.
【００１１】位置演算回路５の機能について、図２の位
置検出の原理を示す模式図を参照しながら説明する。図
２において、各結像レンズ１，２の中点を原点Ｏとし
て、横軸Ｘ，縦軸Ｙを設定し、樹木９に設定された明暗
部分をＭ（ｘ，ｙ）とする。各結像レンズ１，２の光軸
間隔をＢ、共通な焦点距離をｆとすると、結像レンズ２
の中心点ＯR の座標：（Ｂ／２，０）、明暗部分Ｍから
Ｘ軸に下ろした垂線とＸ軸との交点Ｎの座標（ｘ，
０）、点ＯR から光センサアレイ４に下ろした垂線の位
置Ｒ0 の座標：（Ｂ／２，−ｆ）、光センサアレイ４上
の明暗部分Ｍの結像位置Ｒ1 の座標：（ａR1，−ｆ）。
ΔＭＯR ＮとΔＯR Ｒ1 Ｒ0 とは相似であるから、The function of the position calculation circuit 5 will be described with reference to the schematic diagram showing the principle of position detection in FIG. In FIG. 2, the midpoint of each of the imaging lenses 1 and 2 is the origin O, the horizontal axis X and the vertical axis Y are set, and the bright and dark portion set in the tree 9 is set to M (x, y). If the distance between the optical axes of the imaging lenses 1 and 2 is B and the common focal length is f, the imaging lens 2
The center point O R of coordinates: (B / 2,0), the coordinates of the intersection point N of the perpendicular and the X axis drawn on X axis from the light and dark portions M (x,
0), the point O R from position R 0 of perpendicular dropped to the optical sensor array 4 coordinates: (B / 2, -f) , the coordinates of the imaging position R 1 in the dark portion M on the optical sensor array 4 :( a R1 , -f).
Since ΔMO R N and ΔO R R 1 R 0 are similar,
【００１２】[0012]
【数１】 (ｘ−Ｂ／２）ｆ＝（−ａR1＋Ｂ／２）ｙ …(1) 同様に、結像レンズ１の中心ＯL の座標：（−Ｂ／２，
０）、点ＯL から光センサアレイ３に下ろした垂線の位
置Ｌ0 の座標：（−Ｂ／２，−ｆ）、光センサアレイ３
上の点Ｍの結像位置Ｌ1 の座標：（ａL1，−ｆ）。ΔＭ
ＯL ＮとΔＯL Ｌ1 Ｌ0 とは相似であるから、## EQU1 ## (x−B / 2) f = (− a R1 + B / 2) y (1) Similarly, the coordinates of the center O L of the imaging lens 1 are: (−B / 2,
0), the coordinates of the position L 0 of the perpendicular drawn from the point O L to the optical sensor array 3: (−B / 2, −f), the optical sensor array 3
Coordinates of the image forming position L 1 of the upper point M: (a L1 , -f). ΔM
Since O L N and ΔO L L 1 L 0 are similar,
【００１３】[0013]
【数２】 (ｘ＋Ｂ／２）ｆ＝（−ａL1−Ｂ／２）ｙ …(2) 式(1),(2) から(2) (x + B / 2) f = (− a L1 −B / 2) y (2) From equations (1) and (2)
【００１４】[0014]
【数３】 ｘ＝−Ｂ（ａR1＋ａL1）／２（ａR1−ａL1） …(3) [Number 3] x = -B (a R1 + a L1) / 2 (a R1 -a L1) ... (3)
【００１５】[0015]
【数４】 ｙ＝Ｂ・ｆ／（ａR1−ａL1−Ｂ） …(4) となり、各式(3),(4) に基づき、各光センサアレイ３，
４上の樹木９の各結像点Ｌ1 ，Ｒ1 の位置から、明暗部
分Ｍの位置（ｘ，ｙ）が求まる。この各式(3),(4) の演
算が、位置演算回路５によっておこなわれる。図１にお
ける３個の明暗部分Ｍ1,Ｍ2,Ｍ3 の位置が、同様に位置
演算回路５によって求められる。Equation 4] y = B · f / (a R1 -a L1 -B) ... (4) next, the formula (3), (4) based on each of the optical sensor array 3,
The position (x, y) of the bright and dark portion M is obtained from the positions of the respective image formation points L 1 and R 1 of the tree 9 on the 4th position. The calculation of these equations (3) and (4) is performed by the position calculation circuit 5. The positions of the three bright and dark portions M 1 , M 2 and M 3 in FIG. 1 are similarly obtained by the position calculation circuit 5.
【００１６】図３は樹径測定の原理を示す模式図であ
る。図において、樹木９の明暗部分をＭ1(ｘ1,ｙ1)、Ｍ
2(ｘ2,ｙ2)、Ｍ3(ｘ3,ｙ3)、樹木９の中心をＯ0(ｘ0,ｙ
0)、半径をｒとすると、各明暗部分Ｍ1,Ｍ2,Ｍ3 が同一
円上に位置することから、次の三つの式が得られる。FIG. 3 is a schematic diagram showing the principle of tree diameter measurement. In the figure, the light and dark parts of the tree 9 are represented by M 1 (x 1 , y 1 ), M
2 (x 2 , y 2 ), M 3 (x 3 , y 3 ), the center of the tree 9 is O 0 (x 0 , y
0 ) and the radius is r, the bright and dark portions M 1 , M 2 and M 3 are located on the same circle, and therefore the following three equations are obtained.
【００１７】[0017]
【数５】 (ｘ1 −ｘ0)2 ＋ (ｙ1 −ｙ0)2 ＝ ｒ2 …(5) [Number 5] (x 1 -x 0) 2 + (y 1 -y 0) 2 = r 2 ... (5)
【００１８】[0018]
【数６】 (ｘ2 −ｘ0)2 ＋ (ｙ2 −ｙ0)2 ＝ ｒ2 …(6) [6] (x 2 -x 0) 2 + (y 2 -y 0) 2 = r 2 ... (6)
【００１９】[0019]
【数７】 (ｘ3 −ｘ0)2 ＋ (ｙ3 −ｙ0)2 ＝ ｒ2 …(7) さらに簡単のために、ｘ2 ＝ｘ0 ＝０、ｘ1 ＝−ｘ3 と
すると、ｙ1 ＝ ｙ3 、である。したがって、各式(5)
, (7) から次の式(8) が、また式(6) から次の式(9)
が得られる。In Equation 7] (x 3 -x 0) 2 + (y 3 -y 0) 2 = r 2 ... (7) for further simplicity, when x 2 = x 0 = 0, x 1 = -x 3 , Y 1 = y 3 . Therefore, each equation (5)
, (7) to the following equation (8), and equation (6) to the following equation (9)
Is obtained.
【００２０】[0020]
【数８】 ｘ1 2 ＋ (ｙ1 −ｙ0)2 ＝ ｒ2 …(8) [Equation 8] x 1 2 + (y 1 −y 0 ) 2 = r 2 (8)
【００２１】[0021]
【数９】 ｙ2 −ｙ0 ＝ ｒ …(9) 式(8) , (9) から、樹木9 の直径Ｄは次式で表される。Y 2 −y 0 = r (9) From equations (8) and (9), the diameter D of the tree 9 is represented by the following equation.
【００２２】[0022]
【数１０】 Ｄ＝ ２ｒ ＝〔ｘ1 2 ＋ (ｙ1 −ｙ2)2 〕／ (ｙ1 −ｙ2) …(10) つまり位置演算回路５によって、各明暗部分の位置、Ｍ
1(ｘ1,ｙ1)、Ｍ2(ｘ2,ｙ2)、Ｍ3(ｘ3,ｙ3)が求められ、
樹径演算回路６によって式(10)の演算がおこなわれ、樹
径Ｄが得られる。[Equation 10] D = 2r = [x 1 2 + (y 1 −y 2 ) 2 ] / (y 1 −y 2 ) ... (10) That is, the position calculation circuit 5 causes the position of each bright and dark part, M
1 (x 1 , y 1 ), M 2 (x 2 , y 2 ), M 3 (x 3 , y 3 ) are obtained,
Equation (10) is calculated by the tree diameter calculation circuit 6 to obtain the tree diameter D.
【００２３】[0023]
【発明の効果】請求項１ないし３のいずれかの項に係る
対象物の直径測定装置では、位置演算部によって、検出
部の各光センサアレイから、その上に結像する、対象物
表面に設定された少なくとも３個の位置検出用明暗部分
の各像の位置に応じて出力される信号に基づき、各位置
検出用明暗部分と検出部との各相対位置が求められる。
次に、直径演算部によって、位置演算部によって求めら
れた各相対位置に係るデータに基づき、対象物の直径が
求められる。 したがって、円柱状対象物の直径を遠隔
的に、非接触で、しかも光センサアレイの分解能に応じ
て高精度に求めることができる。また、光センサアレイ
や、位置演算回路、直径演算回路などは小形，軽量に製
作できるから、装置の小形・軽量化が図れる。In the diameter measuring device for an object according to any one of claims 1 to 3, the position calculating section forms an image on each of the optical sensor arrays of the detecting section on the object surface. Based on the signals output according to the positions of the respective images of the set at least three position detecting bright and dark portions, the relative positions of the position detecting bright and dark portions and the detection unit are obtained.
Next, the diameter calculation unit calculates the diameter of the object based on the data relating to each relative position calculated by the position calculation unit. Therefore, the diameter of the cylindrical object can be obtained remotely, in a non-contact manner, and with high accuracy according to the resolution of the optical sensor array. Further, since the optical sensor array, the position calculation circuit, the diameter calculation circuit, and the like can be manufactured in a small size and a light weight, the device can be made small and lightweight.
【００２４】とくに請求項２に係る対象物の直径測定装
置では、位置検出用明暗部分が、測定側から放射状に、
かつ隣り合う同士が一定中心角度で対象物に投射された
３個の、対象物の軸線に長手方向が平行なスリット光に
よる対象物表面の照射部分である。したがって、その各
照射部分が位置検出に適切なように、遠隔的，非接触
に、かつ自由に設定可能で、それだけ使用上便利であ
り、かつ演算処理が簡単になってその迅速化が図れる。Particularly, in the object diameter measuring device according to the second aspect, the position detecting bright and dark portions are radially arranged from the measuring side,
Further, it is an irradiation part on the surface of the object with three slit lights whose adjacent directions are projected onto the object at a constant center angle and whose longitudinal direction is parallel to the axis of the object. Therefore, each irradiation portion can be set remotely, in a non-contact manner, and freely so as to be suitable for position detection, which is convenient in use, and the arithmetic processing can be simplified to speed up the operation.
【００２５】とくに請求項３に係る対象物の直径測定装
置では、対象物が樹木であるから、森林での遠隔的で非
接触な測定が可能なこと、装置が小形，軽量なことは、
樹径測定作業を非常に便利にし、作業の効率や安全性の
向上が図れ、さらには作業者の士気向上、作業コストの
低減、作業の省力化などにつながる。請求項１に係るで
は、Particularly, in the object diameter measuring device according to claim 3, since the object is a tree, it is possible to perform remote and non-contact measurement in the forest, and the device is small and lightweight.
This makes tree diameter measurement work extremely convenient, improves work efficiency and safety, and further improves worker morale, reduces work costs, and saves labor. According to claim 1,
【図１】この発明に係る実施例の構成を示すブロック図FIG. 1 is a block diagram showing the configuration of an embodiment according to the present invention.
【図２】位置検出の原理を示す模式図FIG. 2 is a schematic diagram showing the principle of position detection.
【図３】樹径測定の原理を示す模式図[Fig. 3] Schematic diagram showing the principle of tree diameter measurement
１，２ 結像レンズ ３，４ 光センサアレイ ５ 位置演算回路 ６ 樹径演算回路 ７ メモリ ９ 樹木 1, 2 Imaging lens 3, 4 Optical sensor array 5 Position calculation circuit 6 Tree diameter calculation circuit 7 Memory 9 Tree
Claims (3)
置であって、結像レンズを前置した光センサアレイの２
個が対象物に対向して並設されてなる検出部と；その各
光センサアレイから、その上に結像する、対象物表面に
設定された少なくとも３個の位置検出用明暗部分の各像
の位置に応じて出力される信号に基づき、各位置検出用
明暗部分と検出部との相対位置をそれぞれ求める位置演
算部と；この位置演算部によって求められた各相対位置
に係るデータに基づき、対象物の直径を求める直径演算
部と；を備えることを特徴とする対象物の直径測定装
置。1. A device for remotely measuring the diameter of a cylindrical object, comprising an optical sensor array having an imaging lens in front thereof.
A detection unit in which individual pieces are arranged in parallel facing the target object; and respective images of at least three light and dark portions for position detection set on the surface of the target object, which are imaged on the respective photosensor arrays. Based on the signal output according to the position of the position detecting unit, the position calculating unit for obtaining the relative position of each of the position detecting bright and dark portions and the detecting unit; and based on the data relating to each relative position obtained by the position calculating unit, An object diameter measuring device, comprising: a diameter calculation unit for determining the diameter of the object.
用明暗部分は、測定側から放射状にかつ隣り合う同士が
一定中心角度で対象物に投射された３個の、対象物の軸
線に長手方向が平行なスリット光による対象物表面の照
射部分であることを特徴とする対象物の直径測定装置。2. The device according to claim 1, wherein the position detecting bright and dark portions are three radial lines from the measurement side and adjacent to each other are projected onto the target object at a constant center angle. An apparatus for measuring a diameter of an object, which is an irradiation portion of an object surface by slit light whose longitudinal directions are parallel to each other.
対象物は、樹木であることを特徴とする対象物の直径測
定装置。3. The apparatus according to claim 1 or 2, wherein
The object is a diameter measuring device, wherein the object is a tree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25461693A JPH07110218A (en) | 1993-10-13 | 1993-10-13 | Instrument for measuring diameter of object |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25461693A JPH07110218A (en) | 1993-10-13 | 1993-10-13 | Instrument for measuring diameter of object |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07110218A true JPH07110218A (en) | 1995-04-25 |
Family
ID=17267515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25461693A Pending JPH07110218A (en) | 1993-10-13 | 1993-10-13 | Instrument for measuring diameter of object |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07110218A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040047135A (en) * | 2002-11-29 | 2004-06-05 | 대우조선해양 주식회사 | Laser |
-
1993
- 1993-10-13 JP JP25461693A patent/JPH07110218A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040047135A (en) * | 2002-11-29 | 2004-06-05 | 대우조선해양 주식회사 | Laser |
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