JPH0375802B2 - - Google Patents
Info
- Publication number
- JPH0375802B2 JPH0375802B2 JP60261235A JP26123585A JPH0375802B2 JP H0375802 B2 JPH0375802 B2 JP H0375802B2 JP 60261235 A JP60261235 A JP 60261235A JP 26123585 A JP26123585 A JP 26123585A JP H0375802 B2 JPH0375802 B2 JP H0375802B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- reflected
- inspection vehicle
- utility pole
- right angles
- 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.)
- Expired - Lifetime
Links
- 238000007689 inspection Methods 0.000 claims description 17
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001028 reflection method Methods 0.000 description 1
Landscapes
- Geophysics And Detection Of Objects (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Length Measuring Devices By Optical Means (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、青空、白雲、トンネル内壁などの環
境条件に左右されずに正しく電柱の有無を検出で
き、しかも小型軽量化可能な検測車用電柱位置検
出器に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides an inspection vehicle that can accurately detect the presence or absence of utility poles regardless of environmental conditions such as blue skies, white clouds, and tunnel inner walls, and that can be made smaller and lighter. Regarding utility pole position detectors.
従来から、検測車車両の屋根の上に検出器を設
置し、別の投光器から照射させた光が、電柱の金
具で反射されて戻つて来た光を、前記検出器に受
光させ、電柱位置を検出する方式の検測車用電柱
位置検出器が使用されていた。
Conventionally, a detector is installed on the roof of an inspection vehicle, and the detector receives the light that is emitted from another floodlight and returns after being reflected by the metal fittings of the utility pole. A utility pole position detector for inspection vehicles that detects position was used.
しかし、従来は傾斜投光反射方式だつたため投
光器の角度調整が微妙で困難、昼間でも青空、白
雲空では受光レベルの変動があり、受光信号を電
柱検出信号とみなすべきか否かの判定が困難、更
にトンネル壁面の汚れ等、壁面反射光のレベル変
動が大きく、トンネル判定が困難、しかも余り小
型にすることも困難などの問題が生じていた。 However, since the conventional method used an inclined light projection and reflection method, it was difficult to adjust the angle of the projector delicately, and even in the daytime, the received light level fluctuated under blue skies and white clouds, making it difficult to determine whether or not the received light signal should be regarded as a utility pole detection signal. In addition, problems such as dirt on the tunnel wall surface caused large fluctuations in the level of light reflected from the wall surface, making it difficult to judge the tunnel, and furthermore, making it too small.
本発明は、従来の検測車用電柱位置検出器のよ
うな問題点のない、すなわち、投光器の設置角度
調整の必要がなく、昼間、夜間等いずれの環境条
件でも電柱に取付けたトロリ線支持金具位置（存
在）を検出でき、トンネル内外の判別も容易で、
しかも従来の検出器に比べ小型化可能な検測車用
電柱位置検出器を提供することを目的とする。
The present invention does not have the problems of conventional utility pole position detectors for inspection vehicles, that is, there is no need to adjust the installation angle of the floodlight, and the contact wire support attached to the utility pole can be used in both daytime and nighttime environmental conditions. The position (presence) of metal fittings can be detected, making it easy to distinguish between inside and outside the tunnel.
Moreover, it is an object of the present invention to provide a utility pole position detector for inspection vehicles that can be made smaller than conventional detectors.
本発明では、投光器設置角度の困難な調節作業
をなくすために、検測車の走行方向に直角にレー
ザビームを照射させることにした。実際には、検
測車の車両の屋根の上に、トロリ線自体を照射し
ないで、電柱のトロリ線支持金具を照射する方向
に光学系を取付ける。結局、検測車の車両の中心
線から離れた位置に投光系を設置することにな
る。走行方向に直角な方向に照射させれば、反射
光の大部分も走行方向に直角に戻つて来る筈であ
る。従つて、一度、正確に設置すれば、以後、設
置角度の調整作業は不要である。
In the present invention, in order to eliminate the difficult work of adjusting the installation angle of the projector, the laser beam is irradiated perpendicularly to the traveling direction of the inspection vehicle. In reality, an optical system is installed on the roof of the inspection vehicle in a direction that does not illuminate the contact wire itself, but illuminates the contact wire support fitting of the utility pole. As a result, the light projection system will be installed at a position away from the center line of the inspection vehicle. If the light is emitted in a direction perpendicular to the direction of travel, most of the reflected light should also return perpendicular to the direction of travel. Therefore, once it is installed accurately, there is no need to adjust the installation angle thereafter.
また、検測車の屋根の上から、上の方に向けて
光の照射させ、その反射光を計測しようとするの
であるから、反射光の受光系には空からの光が入
射する。しかも此の空（実際には、上の方と言つ
た方が正しい）からの光のレベルは、青空、白雲
に覆われた空、夜、トンネルの天井からの反射光
などで、甚だしい相違が存在する。そのため、正
しく、目的とする電柱のトロリ線支持金具からの
反射光を、その他の入射光と区別するために、投
射光を所定周波数でパルス的に点滅変調させて、
その周波数によつて、その他の入射光から選別で
きるようにした。また、トンネルの天井などから
の反射光は、長い時間継続して入射するが、いま
検出したい支持金具からの反射光は長い時間にわ
たつて継続するものではない。支持金具からの反
射光だけを選別するには、反射光が入射している
間のレーザビーム変調パルス数を計測して、その
パルス数が所定の比較的少ない数で一旦途絶える
ようなものだけを所望の電柱位置検出信号と判定
すれば良いことになる。 Furthermore, since light is radiated upward from the roof of the inspection vehicle and the reflected light is measured, light from the sky enters the reflected light receiving system. Moreover, the level of light from the sky (actually, it would be more accurate to say "above") can vary enormously between blue skies, white cloud-covered skies, night light, and reflections from tunnel ceilings. exist. Therefore, in order to correctly distinguish the reflected light from the trolley wire support fitting of the target utility pole from other incident light, the projected light is modulated in pulses at a predetermined frequency.
The frequency allows it to be separated from other incident light. Further, although reflected light from a tunnel ceiling or the like continues to enter the tunnel for a long time, the reflected light from the support metal fittings that we want to detect does not continue for a long time. To select only the reflected light from the support fitting, measure the number of laser beam modulation pulses while the reflected light is incident, and select only those whose pulse number stops at a predetermined relatively small number. It is only necessary to determine that it is a desired utility pole position detection signal.
なお、レーザビームが、検出対象である支持金
具近傍の位置でかなり深い焦点深度で集束するこ
とが望ましい。 Note that it is desirable that the laser beam be focused at a position near the support metal fitting to be detected with a considerably deep depth of focus.
図は本発明の一実施例を示し、図中、１はレー
ザダイオード、２はレーザダイオードを所定の周
波数でパルス駆動させるパルス発振回路、３は平
行投射光を得るためのレンズ、４はプリズム、５
は凹面鏡、６はレーザダイオードからの光だけを
透過するフイルタ、７は受光素子たとえばpinホ
トダイオード、８は受光レベル信号制御回路であ
る。図中、光線は進行方向の示す矢印をつけた直
線で示してあるように、レーザダイオード１から
放射されたレーザ光線は、レンズ３を通り、平行
光線となり、プリズム４に入つて光路を直角に曲
げられて、図示してない検測車の上方の、電柱に
取付けられたトロリ線支持金具の方に向かつて、
検測車の進行方向に直角に進み、図示してない支
持金具（または他の物体たとえばトンネル天井）
によつて反射され拡散されて、検測車の進行方向
に直角に戻つて来て凹面鏡５に受光され反射、集
束され、プリズム４によつて再度光路を直角に曲
げられフイルタ６を通過して受光素子７に入射
し、ここで光電変換されて電気信号となり、受光
レベル信号制御回路８に入つて所要の処理を施さ
れ確実正確な電柱位置検出信号を選別出力する。
レーザダイオードや受光素子を上記の如く同軸上
に配置し、実際に対象物を照射する光や反射光の
光路を、前記の軸に直角な方向に曲げたので、検
出器全体の配置を小型に纒めることが出来、しか
も構成部材の設置方向や位置などを現場で調整し
直す必要が無くなつた。なお、反射光は拡散され
広い光路を戻つて来るので、光路の途中にプリズ
ムが存在しても、出力信号レベルに問題を生ずる
ような恐れは無い。
The figure shows an embodiment of the present invention, in which 1 is a laser diode, 2 is a pulse oscillation circuit for driving the laser diode in pulses at a predetermined frequency, 3 is a lens for obtaining parallel projection light, 4 is a prism, 5
6 is a concave mirror, 6 is a filter that transmits only the light from the laser diode, 7 is a light receiving element such as a pin photodiode, and 8 is a light receiving level signal control circuit. In the figure, the laser beam emitted from the laser diode 1 passes through the lens 3, becomes a parallel beam, enters the prism 4, and makes the optical path perpendicular, as shown by the straight line with an arrow indicating the direction of travel. It was bent and facing toward the contact wire support bracket attached to the utility pole above the inspection vehicle (not shown).
Proceed at right angles to the direction of travel of the inspection vehicle, and attach any supports (or other objects, not shown), such as the tunnel ceiling.
The light is reflected and diffused by the light beam, returns at right angles to the traveling direction of the inspection vehicle, is received by concave mirror 5, is reflected and focused, and is again bent at a right angle by prism 4, passing through filter 6. The light enters the light receiving element 7, where it is photoelectrically converted into an electric signal, enters the light receiving level signal control circuit 8, undergoes necessary processing, and selects and outputs a reliable and accurate utility pole position detection signal.
The laser diode and light-receiving element are arranged on the same axis as described above, and the optical path of the light that actually irradiates the object and the reflected light are bent in a direction perpendicular to the axis, which allows the overall arrangement of the detector to be made smaller. In addition, there is no need to readjust the installation direction and position of component parts on site. Note that since the reflected light is diffused and returns along a wide optical path, even if a prism is present in the middle of the optical path, there is no risk of causing a problem in the output signal level.
既に説明したように、レーザ光線は所定の周波
数でパルス変調させてあるから、受光素子の出力
信号の中から、この検出器のレーザ光源によるも
のを容易に選別できる。こうして選別された信号
のパルスを計数して、計数したパルス数が所定数
以下で一旦途切れる信号だけを、電柱位置検出信
号として選別することも容易である。こうして、
天候状態や昼夜の別、トンネル内外の別などにわ
ずらわされずに、電柱位置を確実、容易に検出で
きる。 As already explained, since the laser beam is pulse-modulated at a predetermined frequency, signals generated by the laser light source of this detector can be easily selected from among the output signals of the light receiving element. It is also easy to count the pulses of the signals selected in this way and to select only those signals that are temporarily interrupted when the counted number of pulses is less than a predetermined number as utility pole position detection signals. thus,
The location of utility poles can be detected reliably and easily without worrying about weather conditions, whether it is day or night, whether inside or outside a tunnel, etc.
また、レーザ光線により、強度の強い光ビーム
を用いるので、外光に対して、反射光強度を十分
強くすることが出来、またレーザ光だけを透過さ
せるフイルタを受光素子に前置して外光の影響を
抑圧できるので、Ｓ／Ｎ比の良好な検出信号が得
られる。 In addition, since a strong laser beam is used, the intensity of the reflected light can be made sufficiently strong compared to external light, and a filter that only transmits the laser beam is placed in front of the light receiving element. Since the influence of can be suppressed, a detection signal with a good S/N ratio can be obtained.
以上説明したように本発明によれば、環境条件
に左右されず、現場において光学系の調整を繰り
返す必要もなく、信頼性の高い正確な電柱位置検
出信号が得られ、しかも、検出器全体を小型に纒
めることができる。
As explained above, according to the present invention, a highly reliable and accurate utility pole position detection signal can be obtained without being influenced by environmental conditions and without the need to repeatedly adjust the optical system on site. It can be packed into a small size.
図は本発明の一実施例である測定器の構成図で
ある。
１……レーザダイオード、２……パルス発振回
路、３……投射レンズ、４……プリズム、５……
凹面鏡、６……レーザ光のみを透過するフイル
タ、７……受光素子、８……受光レベル信号制御
回路。
The figure is a configuration diagram of a measuring instrument that is an embodiment of the present invention. 1... Laser diode, 2... Pulse oscillation circuit, 3... Projection lens, 4... Prism, 5...
Concave mirror, 6... Filter that transmits only laser light, 7... Light receiving element, 8... Light receiving level signal control circuit.
Claims (1)
波数でパルス変調させたレーザビームを、トロリ
線支持用で反射光量が比較的多い電柱の金具に向
けて、対象物位置検傍で所望深度の焦点を結ぶよ
うな光学系を介して投射させ被照射物体で反射さ
れた光のうち、検測車進行方向に直角に、拡散さ
れて戻つてきた光を凹面鏡で受光反射させて受光
器に集束入射させ、受光器により光電変換された
出力信号のうち、前記所定周波数の信号のみを選
択してパルス数を計数させ、更に、連続したパル
スの計数値が所定値以下で一旦途絶えたものだけ
を、正しい電柱位置検出信号と判定して出力する
ようにしたことを特徴とする検測車用電柱位置検
出器。 ２ 投射光放射用レーザダイオードと、受光素子
とを同軸上に配列し、これら両者の中間に配置し
たプリズムによつて投射光の光路を直角に、即ち
前記両者を結ぶ線に直角に曲げさせ、この曲げら
れた光で対象物体を照射させ被照射対象物体で反
射され拡散されて投射光に逆行して戻つて来た光
を、プリズムに対し対象物体の反対側に配置され
た凹面鏡にあてて反射集束させ、プリズムにより
此の反射光の光路を再び直角に曲げさせて受光素
子に入射させるようにした特許請求の範囲第１項
記載の検測車用電柱位置検出器[Claims] 1. A laser beam that is pulse-modulated at a predetermined frequency is directed from an inspection vehicle in a direction perpendicular to the direction of travel toward the metal fittings of utility poles that support contact wires and have a relatively large amount of reflected light. Among the light that is projected through an optical system that focuses at the desired depth during position inspection and reflected by the irradiated object, the light that is diffused and returned at right angles to the direction of travel of the inspection vehicle is received by a concave mirror. Among the output signals that are reflected and focused into a photoreceiver and photoelectrically converted by the photoreceiver, only the signals of the predetermined frequency are selected and the number of pulses is counted. A utility pole position detector for an inspection vehicle, characterized in that only a signal that is once interrupted is determined to be a correct utility pole position detection signal and outputted. 2. A laser diode for emitting projected light and a light receiving element are arranged on the same axis, and a prism placed between the two bends the optical path of the projected light at right angles, that is, at right angles to the line connecting the two, The target object is irradiated with this bent light, and the light that is reflected and diffused by the irradiated target object and returns in the opposite direction to the projected light is applied to a concave mirror placed on the opposite side of the target object to the prism. A utility pole position detector for an inspection vehicle according to claim 1, wherein the reflected light is focused by reflection, and the optical path of the reflected light is bent again at right angles by a prism to be incident on a light receiving element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60261235A JPS62121303A (en) | 1985-11-22 | 1985-11-22 | Electric pole position detector for truck for detection/ measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60261235A JPS62121303A (en) | 1985-11-22 | 1985-11-22 | Electric pole position detector for truck for detection/ measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62121303A JPS62121303A (en) | 1987-06-02 |
| JPH0375802B2 true JPH0375802B2 (en) | 1991-12-03 |
Family
ID=17359015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60261235A Granted JPS62121303A (en) | 1985-11-22 | 1985-11-22 | Electric pole position detector for truck for detection/ measurement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62121303A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013545976A (en) * | 2010-10-25 | 2013-12-26 | 株式会社ニコン | Apparatus, optical assembly, method of inspecting or measuring an object, and method of manufacturing a structure |
| CN103438873A (en) * | 2013-08-28 | 2013-12-11 | 国网河南省电力公司南阳供电公司 | Power line surveying and measuring technology |
-
1985
- 1985-11-22 JP JP60261235A patent/JPS62121303A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62121303A (en) | 1987-06-02 |
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