JP2002228418A - Dimension measuring apparatus - Google Patents
Dimension measuring apparatusInfo
- Publication number
- JP2002228418A JP2002228418A JP2001028287A JP2001028287A JP2002228418A JP 2002228418 A JP2002228418 A JP 2002228418A JP 2001028287 A JP2001028287 A JP 2001028287A JP 2001028287 A JP2001028287 A JP 2001028287A JP 2002228418 A JP2002228418 A JP 2002228418A
- Authority
- JP
- Japan
- Prior art keywords
- dimension measuring
- measuring device
- imaging
- imaging unit
- hands
- 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.)
- Granted
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Electric Cable Installation (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、測定対象物の寸法
を撮影画像から測定する寸法測定装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a size measuring device for measuring the size of a measurement object from a photographed image.
【０００２】[0002]
【従来の技術】例えば管路等のように、作業者が直接目
視できないようなものの内部に存在する異物等の測定対
象物の寸法を測定する場合、ケーブルの先端に取り付け
られた小型ＣＣＤカメラ等の撮像機器を管路内に挿入
し、この撮像機器によって撮像した管路内の撮影画像に
基づいて上記異物等の測定対象物の寸法を測定すること
が行われている。このような撮影画像に基づく寸法測定
方法では、例えば異なる方向から測定対象物を撮影し
た際の視差に基づいて撮像機器と測定対象物までの距離
を測定して測定対象物の寸法を計測する方法や、測定
対象物に特殊な線状影を投影し、当該線状影が撮影画面
の何処に位置するかに基づいて撮像機器と測定対象物ま
での距離を測定して測定対象物の寸法を計測する方法、
等が知られている。2. Description of the Related Art When measuring the size of an object to be measured such as a foreign matter, which is present inside a pipe or the like that cannot be directly viewed by an operator, a small CCD camera attached to the end of a cable, etc. Is being inserted into a pipeline, and the dimensions of a measurement object such as the foreign substance are measured based on a captured image in the pipeline captured by the imaging device. In such a dimension measurement method based on a photographed image, for example, a method of measuring the distance between an imaging device and a measurement target based on parallax when capturing the measurement target from different directions and measuring the dimension of the measurement target Also, a special linear shadow is projected on the measurement target, and the distance between the imaging device and the measurement target is measured based on where the linear shadow is located on the shooting screen, and the dimension of the measurement target is determined. How to measure,
Etc. are known.
【０００３】[0003]
【発明が解決しようとする課題】ところで、上述した従
来技術は、装置全体の構成が複雑であり、この結果取扱
いが煩雑であると共にコストアップになるという問題点
がある。すなわち、上記各従来技術では、撮影画面をデ
ジタル画像処理することによって視差や線状影の位置検
出を行っており、この検出結果に基づいて撮像機器と測
定対象物までの距離を演算し、この演算結果に基づいて
撮影画面上に映し出された測定対象物の実際の寸法を算
出するので、このような各種演算を行うための演算装置
が必要となる。However, the above-mentioned prior art has a problem that the structure of the whole apparatus is complicated, and as a result, the handling is complicated and the cost is increased. That is, in each of the above-described prior arts, the position of parallax or a linear shadow is detected by performing digital image processing on a shooting screen, and the distance between the imaging device and the measurement target is calculated based on the detection result. Since the actual dimensions of the measurement target projected on the photographing screen are calculated based on the calculation results, a calculation device for performing such various calculations is required.
【０００４】また、異なる方向から測定対象物を撮影す
るために、あるいは測定対象物に特殊な線状影を投影す
るために、光学系つまり撮像機器の構成が複雑化する。
そして、この結果として取扱いの煩雑化やコストアップ
を招くと共に、故障率の上昇をも招来する。In addition, the configuration of an optical system, that is, an imaging device, is complicated in order to photograph an object to be measured from different directions or to project a special linear shadow on the object to be measured.
As a result, the handling is complicated and the cost is increased, and the failure rate is increased.
【０００５】本発明は、上述する問題点に鑑みてなされ
たもので、比較的構成が簡単な寸法測定装置を提供する
ことを目的とするものである。The present invention has been made in view of the above-mentioned problems, and has as its object to provide a dimension measuring apparatus having a relatively simple configuration.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明では、寸法測定装置に係わる第１の手段とし
て、測定対象物を撮影する撮像部と、該撮像部の撮影画
面内に映し出されるように、撮像部から所定間隔で前方
に突設した複数の指針と、撮影画面を表示する画像表示
手段とを具備する手段を採用する。In order to achieve the above object, according to the present invention, as a first means relating to a dimension measuring apparatus, an image pickup section for picking up an object to be measured and a photographing screen of the image pickup section are provided. A means including a plurality of hands protruding forward at a predetermined interval from the imaging unit so as to be displayed, and image display means for displaying a shooting screen is adopted.
【０００７】また、寸法測定装置に係わる第２の手段と
して、上記第１の手段において、指針を弾性材料から形
成するという手段を採用する。Further, as the second means relating to the dimension measuring device, the above-mentioned first means employs means for forming the pointer from an elastic material.
【０００８】寸法測定装置に係わる第３の手段として、
上記第１または第２の手段において、撮像部に照明用光
源を付加するという手段を採用する。[0008] As a third means relating to the dimension measuring device,
In the first or second means, means for adding a light source for illumination to the imaging unit is employed.
【０００９】寸法測定装置に係わる第４の手段として、
上記第１〜第３いずれかの手段において、撮像部は小型
ＣＣＤカメラを備え、長尺状の信号ケーブルの先端に前
記小型ＣＣＤカメラを、また後端に画像表示手段を各々
設けるという手段を採用する。As a fourth means relating to the dimension measuring device,
In any one of the first to third means, the image pickup unit includes a small CCD camera, the small CCD camera is provided at a front end of a long signal cable, and an image display unit is provided at a rear end. I do.
【００１０】寸法測定装置に係わる第５の手段として、
上記第４の手段において、撮像部の横断面形状が円筒形
であるという手段を採用する。As a fifth means relating to the dimension measuring device,
In the fourth means, a means is adopted in which the cross-sectional shape of the imaging section is cylindrical.
【００１１】寸法測定装置に係わる第６の手段として、
上記第４の手段において、撮像部の横断面形状が略三日
月形であるという手段を採用する。As a sixth means relating to the dimension measuring device,
In the fourth means, a means is employed in which the cross-sectional shape of the imaging section is substantially crescent-shaped.
【００１２】[0012]
【発明の実施の形態】以下、図面を参照して、本発明に
係わる寸法測定装置の一実施形態について説明する。な
お、本実施形態は、地中に埋設される電力配管の管路内
検査に本発明を適用したものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a dimension measuring device according to the present invention will be described with reference to the drawings. In the present embodiment, the present invention is applied to an inspection in a pipeline of a power pipe buried underground.
【００１３】図１は、本実施形態の全体構成を示すシス
テム構成図である。この図において、符号１は撮像部、
２は信号ケーブル、３はドラム、４はモニタ（画像表示
手段）である。撮像部１は信号ケーブル２の先端に取り
付けられ、モニタ４は当該信号ケーブル２の後端に接続
されている。図示するように、撮像部１は、作業員が信
号ケーブル２を操作することにより電力配管内に順次送
り込まれて、当該電力配管内の各部状態を撮影する。FIG. 1 is a system configuration diagram showing the overall configuration of the present embodiment. In this figure, reference numeral 1 denotes an imaging unit,
2 is a signal cable, 3 is a drum, and 4 is a monitor (image display means). The imaging unit 1 is attached to a distal end of the signal cable 2, and the monitor 4 is connected to a rear end of the signal cable 2. As shown in the drawing, the imaging unit 1 is sequentially sent into an electric power pipe by an operator operating the signal cable 2 and photographs the state of each part in the electric power pipe.
【００１４】このような撮像部１によって撮影された映
像は、映像信号として信号ケーブル２を介してモニタ４
に入力され、該モニタ４によって撮像画面として表示さ
れるようになっている。なお、ドラム３は、電力配管の
長さに応じた長尺状の信号ケーブル２を巻き取るもので
あり、地上に設けられている。An image photographed by the image pickup unit 1 is transmitted as a video signal to a monitor 4 via a signal cable 2.
And displayed on the monitor 4 as an image pickup screen. In addition, the drum 3 winds the long signal cable 2 corresponding to the length of the electric power pipe, and is provided on the ground.
【００１５】上記撮像部１は、図２に示すように、本体
１ａ、小型ＣＣＤカメラ１ｂ、照明用光源１ｃ，１ｃ及
び１対の指針１ｄ，１ｄ等から構成されている。本体１
ａは小型ＣＣＤカメラ１ｂ及び照明用光源１ｃ，１ｃを
収容するものであり、信号ケーブル２の軸線方向に直交
する横断面の形状が略三日月形に形成されている。ま
た、本体１ａの先端面１ｅは、上記横断面と同様に信号
ケーブル２の軸線方向に対して直交しており、したがっ
て略三日月形に形成されている。このような本体形状を
有する撮像部１は、円筒状の電力配管と該電力配管内に
挿通状態とされた電力ケーブルとの隙間に沿って電力配
管内に順次送り込まれる。As shown in FIG. 2, the imaging section 1 comprises a main body 1a, a small CCD camera 1b, illumination light sources 1c, 1c, a pair of hands 1d, 1d, and the like. Body 1
The symbol a accommodates the small CCD camera 1b and the illumination light sources 1c, 1c, and has a substantially crescent-shaped cross section orthogonal to the axial direction of the signal cable 2. Further, the distal end face 1e of the main body 1a is orthogonal to the axial direction of the signal cable 2 similarly to the above-described cross section, and is thus formed in a substantially crescent shape. The imaging unit 1 having such a main body shape is sequentially fed into the power pipe along a gap between the cylindrical power pipe and a power cable inserted into the power pipe.
【００１６】小型ＣＣＤカメラ１ｂは、撮影方向が上記
先端面１ｅから先方を向くように設定されており、撮影
した電力配管内の映像を映像信号として信号ケーブル２
を介してモニタ４に供給する。照明用光源１ｃ，１ｃ
は、小型ＣＣＤカメラ１ｂと同様に照明方向が先端面１
ｅから先方を向くように設定されており、小型ＣＣＤカ
メラ１ｂを中心として両側に１対設けられている。照明
用光源１ｃ，１ｃを設けることにより、小型ＣＣＤカメ
ラ１ｂは、暗い電力配管内において当該電力配管内の映
像を確実に撮影することができる。The small CCD camera 1b is set so that the photographing direction is directed from the front end face 1e to the front, and uses the photographed image in the power pipe as a video signal as a signal cable 2.
Is supplied to the monitor 4 via. Lighting sources 1c, 1c
Indicates that the illumination direction is the tip surface 1 as in the case of the small CCD camera 1b.
e, and a pair is provided on both sides of the small CCD camera 1b. By providing the illumination light sources 1c, 1c, the small CCD camera 1b can reliably capture an image in the power pipe in a dark power pipe.
【００１７】指針１ｄ，１ｄは、先端面１ｅにおいて照
明用光源１ｃ，１ｃのさらに外側に、小型ＣＣＤカメラ
１ｂを中心として左右対称な位置に１対設けられてい
る。この指針１ｄ，１ｄは、弾性を備えた弾性材料を針
状に形成したものであり、先端面１ｅから所定間隔Ｌで
前方に突出するように先端面１ｅに植設されている。ま
た、上記間隔Ｌ、先端面１ｅ上における指針１ｄ，１ｄ
の位置及びその長さは、各指針１ｄ，１ｄの先端部が小
型ＣＣＤカメラ１ｂの撮影範囲内となるように設定され
ている。A pair of hands 1d, 1d are provided on the distal end face 1e further outside the illumination light sources 1c, 1c at symmetrical positions with respect to the small CCD camera 1b. The hands 1d, 1d are made of an elastic material having elasticity in a needle shape, and are implanted on the distal end face 1e so as to protrude forward at a predetermined interval L from the distal end face 1e. In addition, the distance L, the hands 1d, 1d on the tip surface 1e
Are set such that the tips of the hands 1d, 1d are within the shooting range of the small CCD camera 1b.
【００１８】図３は、このような指針１ｄ，１ｄの詳細
構成を示す図である。指針１ｄ，１ｄは、例えばチタン
・ニッケル合金等、極めて弾性が強い金属を針金状に形
成し、その中間部分をバネ状に巻回したものである。す
なわち、指針１ｄ，１ｄは、バネ部１ｇの両端に直線部
１ｈ，１ｉを備え、全体として直線状（針状）に形成さ
れている。直線部１ｈの先端は、後述するように測定対
象物に当接される部分であり、直線部１ｉは先端面１ｅ
に植設される部分である。なお、直線部１ｉは、先端面
１ｅに設けられた孔に圧入することにより植設されよう
になっており、すなわち指針１ｄ，１ｄは、先端面１ｅ
に対して着脱自在に構成されているので、交換が容易で
ある。FIG. 3 is a diagram showing a detailed configuration of such hands 1d. The hands 1d and 1d are made of a metal having extremely high elasticity, such as a titanium-nickel alloy, formed in a wire shape, and an intermediate portion thereof is wound in a spring shape. That is, the hands 1d, 1d have linear portions 1h, 1i at both ends of the spring portion 1g, and are formed in a linear shape (needle shape) as a whole. The distal end of the linear portion 1h is a portion that comes into contact with the measurement target as described later, and the linear portion 1i is a distal end surface 1e.
It is a part to be planted in. The linear portion 1i is implanted by press-fitting into a hole provided in the distal end surface 1e, that is, the hands 1d and 1d are arranged in the distal end surface 1e.
Since it is configured to be detachable with respect to, the exchange is easy.
【００１９】次に、このように構成された本寸法測定装
置を用いた測定対象物の寸法測定について、図４を参照
して詳しく説明する。Next, the dimension measurement of the object to be measured using the present dimension measuring apparatus configured as described above will be described in detail with reference to FIG.
【００２０】図４（ａ）は、上記測定対象物としての電
力配管内の異物Ｗの大きさを測定する状態を示す撮像画
面Ｇ1である。この場合、作業員は、信号ケーブル２の
電力配管に対する送り量（長さ）を調節することによ
り、指針１ｄ，１ｄの各先端部を異物Ｗに接触するまで
近接させる。この状態において、撮像画面Ｇ1に映し出
される各指針１ｄ，１ｄの先端部の間隔は規定の間隔Ｌ
であり、この撮像画面上の各先端部の間隔Ｌを基準寸法
として異物Ｗの幅を相対比較することにより当該幅を容
易に測定することができる。FIG. 4A is an imaging screen G1 showing a state in which the size of the foreign matter W in the power pipe as the object to be measured is measured. In this case, the worker adjusts the feed amount (length) of the signal cable 2 to the power pipe so that the tips of the hands 1d and 1d come close to contact with the foreign matter W. In this state, the distance between the tips of the hands 1d, 1d projected on the imaging screen G1 is a specified distance L
Then, the width of the foreign matter W can be easily measured by relatively comparing the width of the foreign matter W with the interval L between the front ends on the imaging screen as a reference dimension.
【００２１】一方、図４（ｂ）は、上記測定対象物とし
ての電力配管のつなぎ部分における段差Ｗ’の寸法ｄの
測定状態を示す撮像画面Ｇ2である。本実施形態では、
作業員が信号ケーブル２を手操作することにより撮像部
１を電力配管内に送り込むので、電力配管内における撮
像部１の撮像位置を自由に変更することができないが、
撮像画面Ｇ2内の各指針１ｄ，１ｄの先端部の間隔Ｌと
の相対比較によって段差寸法ｄを容易に測定することが
できる。On the other hand, FIG. 4 (b) is an image screen G2 showing the measurement state of the dimension d of the step W 'at the junction of the power pipe as the object to be measured. In this embodiment,
Since the operator sends the imaging unit 1 into the power pipe by manually operating the signal cable 2, the imaging position of the imaging unit 1 in the power pipe cannot be freely changed.
The step size d can be easily measured by a relative comparison with the distance L between the tips of the hands 1d, 1d in the imaging screen G2.
【００２２】ここで、各指針１ｄ，１ｄは弾性を有して
いるので、各指針１ｄ，１ｄが異物Ｗや段差Ｗ’に衝突
した場合であっても、各指針１ｄ，１ｄの先端部は容易
に間隔Ｌに復帰する。したがって、指針１ｄ，１ｄの先
端部の間隔Ｌが変化することによる測定精度の低下を抑
えることが可能である。Here, since the hands 1d, 1d have elasticity, even if the hands 1d, 1d collide with the foreign matter W or the step W ', the tips of the hands 1d, 1d remain It easily returns to the interval L. Therefore, it is possible to suppress a decrease in measurement accuracy due to a change in the interval L between the tips of the hands 1d.
【００２３】このように本実施形態によれば、撮像画面
Ｇ1，Ｇ2内における指針１ｄ，１ｄの先端部の間隔Ｌと
異物Ｗや段差Ｗ’との相対比較のみによって電力配管内
における異物Ｗや段差Ｗ’の寸法を極めて簡単な構成で
測定することができる。従来技術のようにデジタル画像
処理や複雑な演算処理を必要としない。また、本体１ａ
の横断面形状が略三日月形に形成されているので、電力
配管と電力ケーブルとの隙間を容易に通過することがで
きる。As described above, according to the present embodiment, only the relative comparison between the distance L between the tips of the hands 1d and 1d in the imaging screens G1 and G2 and the foreign matter W and the level difference W 'can be used. The dimension of the step W ′ can be measured with a very simple configuration. It does not require digital image processing or complicated arithmetic processing unlike the prior art. Also, the main body 1a
Is formed in a substantially crescent shape, so that it can easily pass through the gap between the power pipe and the power cable.
【００２４】なお、本願発明は、上記実施形態に限定さ
れるものではなく、例えば以下のような変形が考えられ
る。 （１）上記実施形態に代えて、図５に示すように本体１
ａ’の横断面形状を円筒形に設定することが考えられ
る。なお、この撮像部１Ａの場合、円形状の先端面１ｇ
には、その中心に小型ＣＣＤカメラ１ｂが配置され、そ
の周りに複数（合計６個）の照明用光源１ｃ，……が等
間隔で配置されている。It should be noted that the present invention is not limited to the above embodiment, and for example, the following modifications can be considered. (1) Instead of the above embodiment, as shown in FIG.
It is conceivable to set the cross-sectional shape of a 'to a cylindrical shape. In the case of the imaging unit 1A, a circular tip surface 1g is used.
, A small CCD camera 1b is arranged at the center thereof, and a plurality of (six in total) illumination light sources 1c,...
【００２５】（２）また、上記実施形態では、指針１
ｄ，１ｄを小型ＣＣＤカメラ１ｂを挟んで左右に１対設
けたが、左右ではなく上下に１対設けても良い。さら
に、左右に加えて上下にも、つまり指針１ｄ，１ｄを合
計２対設けも良い。(2) In the above embodiment, the pointer 1
Although a pair of d and 1d are provided on the left and right with the small CCD camera 1b interposed therebetween, a pair of d and 1d may be provided not on the left and right but on the top and bottom. Further, two pairs of hands 1d, 1d may be provided not only on the left and right but also on the upper and lower sides.
【００２６】（３）さらに、上記実施形態は、電力配管
の管路内検査に本願発明を適用したものであるが、本願
発明は、このような電力配管の検査のみに適用可能なも
のではない。各種測定対象物の寸法測定に適用すること
が可能である。(3) Further, in the above embodiment, the present invention is applied to the inspection of the inside of the electric power piping, but the present invention is not applicable only to such inspection of the electric power piping. . The present invention can be applied to dimension measurement of various measurement objects.
【００２７】[0027]
【発明の効果】以上説明したように、本発明によれば、
測定対象物を撮影する撮像部と、該撮像部の撮影画面内
に映し出されるように、撮像部から所定間隔で前方に突
設した複数の指針と、撮影画面を表示する画像表示手段
とを具備するので、撮像画面内における指針の先端部の
間隔と測定対象物との相対比較のみによって極めて簡単
に測定対象物の寸法を測定することができる。As described above, according to the present invention,
An imaging unit for capturing an object to be measured, a plurality of hands protruding forward at predetermined intervals from the imaging unit so as to be projected on the imaging screen of the imaging unit, and image display means for displaying the imaging screen. Therefore, the dimensions of the measurement target can be extremely easily measured only by comparing the distance between the tips of the hands in the imaging screen and the measurement target.
【図１】 本発明の一実施形態の全体構成を示すシステ
ム構成図である。FIG. 1 is a system configuration diagram showing an overall configuration of an embodiment of the present invention.
【図２】 本発明の一実施形態における撮像部の構成を
示す斜視図である。FIG. 2 is a perspective view illustrating a configuration of an imaging unit according to the embodiment of the present invention.
【図３】 本発明の一実施形態における指針の詳細構成
を示す斜視図である。FIG. 3 is a perspective view showing a detailed configuration of a pointer according to an embodiment of the present invention.
【図４】 本発明の一実施形態において、管路内の異物
に関する撮像画面を示す平面図（ａ）及び管路段差の撮
像画面を示す平面図（ｂ）である。FIGS. 4A and 4B are a plan view and a plan view, respectively, showing an imaging screen for foreign matter in a pipeline and an imaging screen of a pipeline step in one embodiment of the present invention.
【図５】 本発明の一実施形態における撮像部の変形例
を示す斜視図である。FIG. 5 is a perspective view showing a modification of the imaging unit according to the embodiment of the present invention.
１……撮像部、１ａ……本体、１ｂ……小型ＣＣＤカメ
ラ、１ｃ……照明用光源、１ｄ……指針、２……信号ケ
ーブル、３……ドラム、４……モニタ（画像表示手段）DESCRIPTION OF SYMBOLS 1 ... Imaging part, 1a ... Main body, 1b ... Small CCD camera, 1c ... Light source for illumination, 1d ... Pointer, 2 ... Signal cable, 3 ... Drum, 4 ... Monitor (image display means)
Claims (6)
像部（１）から所定間隔で前方に突設した複数の指針
（１ｄ）と、 前記撮影画面を表示する画像表示手段（４）と、 を具備することを特徴とする寸法測定装置。An imaging unit (1) for photographing an object to be measured, and a plurality of projections protruding forward from the imaging unit (1) at predetermined intervals so as to be displayed in a photographing screen of the imaging unit (1). A dimension measuring device comprising: a pointer (1d); and an image display means (4) for displaying the photographing screen.
ことを特徴とする請求項１記載の寸法測定装置。2. The pointer (1d) is formed from an elastic material.
The dimension measuring device according to claim 1, wherein:
加する、ことを特徴とする請求項１または２記載の寸法
測定装置。3. The dimension measuring device according to claim 1, wherein an illumination light source (1c) is added to the imaging unit (1).
ａ）を備え、長尺状の信号ケーブル（２）の先端に前記
小型ＣＣＤカメラ（１ａ）を、また後端に画像表示手段
（４）を各々設ける、ことを特徴とする請求項１〜３い
ずれかに記載の寸法測定装置。4. An image pickup section (1) includes a small CCD camera (1).
a), wherein the small-sized CCD camera (1a) is provided at an end of a long signal cable (2), and an image display means (4) is provided at a rear end, respectively. The dimension measuring device according to any one of the above.
る、ことを特徴とする請求項４記載の寸法測定装置。5. The dimension measuring device according to claim 4, wherein the cross-sectional shape of the imaging section is cylindrical.
である、ことを特徴とする請求項４記載の寸法測定装
置。6. The dimension measuring device according to claim 4, wherein the cross-sectional shape of the imaging section is substantially crescent-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001028287A JP4451003B2 (en) | 2001-02-05 | 2001-02-05 | Dimension measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001028287A JP4451003B2 (en) | 2001-02-05 | 2001-02-05 | Dimension measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002228418A true JP2002228418A (en) | 2002-08-14 |
| JP4451003B2 JP4451003B2 (en) | 2010-04-14 |
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ID=18892811
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001028287A Expired - Fee Related JP4451003B2 (en) | 2001-02-05 | 2001-02-05 | Dimension measuring device |
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| Country | Link |
|---|---|
| JP (1) | JP4451003B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011125093A (en) * | 2009-12-08 | 2011-06-23 | Nippon Telegraph & Telephone East Corp | Insertion assisting tool for pipe camera, and wire lacing assisting tool |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01280203A (en) * | 1988-05-06 | 1989-11-10 | Hitachi Ltd | Gap measuring instrument |
| JPH0834057A (en) * | 1994-07-25 | 1996-02-06 | Shonan Gosei Jushi Seisakusho:Kk | Pipe interior monitor apparatus and method |
| JPH11341637A (en) * | 1998-05-25 | 1999-12-10 | Fujikura Ltd | Tip head for connecting rod |
| JP2000018921A (en) * | 1998-07-06 | 2000-01-21 | Hitachi Ltd | Dimension measuring method and apparatus thereof |
-
2001
- 2001-02-05 JP JP2001028287A patent/JP4451003B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01280203A (en) * | 1988-05-06 | 1989-11-10 | Hitachi Ltd | Gap measuring instrument |
| JPH0834057A (en) * | 1994-07-25 | 1996-02-06 | Shonan Gosei Jushi Seisakusho:Kk | Pipe interior monitor apparatus and method |
| JPH11341637A (en) * | 1998-05-25 | 1999-12-10 | Fujikura Ltd | Tip head for connecting rod |
| JP2000018921A (en) * | 1998-07-06 | 2000-01-21 | Hitachi Ltd | Dimension measuring method and apparatus thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011125093A (en) * | 2009-12-08 | 2011-06-23 | Nippon Telegraph & Telephone East Corp | Insertion assisting tool for pipe camera, and wire lacing assisting tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4451003B2 (en) | 2010-04-14 |
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