JP2772898B2 - Water drop prevention device for optical system of orbit measuring device - Google Patents
Water drop prevention device for optical system of orbit measuring deviceInfo
- Publication number
- JP2772898B2 JP2772898B2 JP5075357A JP7535793A JP2772898B2 JP 2772898 B2 JP2772898 B2 JP 2772898B2 JP 5075357 A JP5075357 A JP 5075357A JP 7535793 A JP7535793 A JP 7535793A JP 2772898 B2 JP2772898 B2 JP 2772898B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- slit
- light receiving
- optical system
- housing
- 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
Landscapes
- Machines For Laying And Maintaining Railways (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、軌道測定装置の光学
系に対する水滴の侵入を防止する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing water droplets from entering an optical system of an orbit measuring device.
【０００２】[0002]
【従来の技術】軌道を構成する２条のレールは、列車運
転により基準位置に対して漸次に変位するので、軌道検
測車に軌道測定装置を設けて走行中にこの変位を測定
し、測定データにより基準状態に整備される。各新幹線
においては、軌道測定装置は光学式のものが使用されて
いる。図２は光学式軌道測定装置の光学系３の構成を示
す。(a) は平面図を示し、光学系３は、図示しない軌道
検測車の床下に設けた筐体内に、左右のレール１Ａ，１
Ｂに対応した光学系３Ａ，３Ｂが配設され、光学系３Ａ
は投光部31Ａと受光部32Ａ，また光学系３Ｂは投光部31
Ｂと受光部32Ｂよりなる。各投光部31より、対応するレ
ール１に対して照射光ＬT が照射され、その反射光ＬR
が対応した受光部32に受光され、それぞれの受光信号を
データ処理部により処理して、各レール１Ａ，１Ｂの変
位が測定される。図２(b) は、上記の光学系３Ａ，３Ｂ
の細部を示す側面図で、筐体４を仕切り板41で仕切り、
その一方に投光部31を、他方に受光部32をそれぞれ収容
する。各投光部31は、内部に光源312 、レンズ313 、ガ
ラス板314 が固定され、先端にスリット板315 が設けら
れた鏡筒311 を、筐体４の底面42に斜め４５°の方向に
取り付けて構成される。各受光部32もほぼ同様で、内部
に光電変換器322 とガラス板323 が固定され、先端にス
リット板324 が設けられた鏡筒321 を、投光部31の鏡筒
311 と対称的に斜め４５°の方向に取り付けて構成され
る。2. Description of the Related Art Since two rails constituting a track are gradually displaced with respect to a reference position by train operation, a track measuring device is provided on a track inspection vehicle, and this displacement is measured during traveling. The data is maintained in the standard condition. In each Shinkansen, an optical track measuring device is used. FIG. 2 shows the configuration of the optical system 3 of the optical trajectory measuring device. (a) is a plan view, and an optical system 3 includes left and right rails 1A and 1A in a housing provided under the floor of a track inspection vehicle (not shown).
B are provided with optical systems 3A and 3B corresponding to the optical system 3A.
Is the light projecting unit 31A and the light receiving unit 32A, and the optical system 3B is the light projecting unit 31
B and a light receiving section 32B. From each light projecting unit 31, the irradiation light L T to the corresponding rail 1 is irradiated, the reflected light L R
Are received by the corresponding light receiving unit 32, the respective light receiving signals are processed by the data processing unit, and the displacement of each rail 1A, 1B is measured. FIG. 2B shows the optical systems 3A and 3B.
In a side view showing the details of the above, the housing 4 is partitioned by a partition plate 41,
One of them accommodates the light emitting unit 31 and the other accommodates the light receiving unit 32. Each of the light projecting sections 31 has a lens barrel 311 having a light source 312, a lens 313, and a glass plate 314 fixed inside and a slit plate 315 provided at a tip, and is attached to the bottom surface 42 of the housing 4 at an angle of 45 °. It is composed. Each of the light receiving sections 32 is substantially the same, and a lens barrel 321 in which a photoelectric converter 322 and a glass plate 323 are fixed and a slit plate 324 is provided at the tip is mounted on the lens barrel of the light emitting section 31.
Symmetrically to 311, it is mounted at an angle of 45 °.
【０００３】以上の構成により、各投光部31の光源312
よりの照射光ＬT は、レンズ313 により集束されてガラ
ス板314 を透過し、スリット板315 のスリット316 によ
り所定の幅とされ、レール１に対して斜め４５°の方向
で、図２(c) に示す光帯２が照射される。光帯２の反射
光ＬR は、各受光部32のスリット325 により有害な外乱
光が排除され、ガラス板323 を透過して光電変換器321
に受光され、受光信号が出力される。With the above configuration, the light source 312 of each light emitting section 31
More irradiation light L T of, is focused by passing through the glass plate 314 by the lens 313, is a predetermined width by a slit 316 of the slit plate 315, in the direction of the oblique 45 ° to the rail 1, FIG. 2 (c The light band 2 shown in FIG. Reflected light L R of the light band 2 is harmful ambient light is eliminated by the slits 325 of the light receiving portion 32, the photoelectric converter is transmitted through the glass plate 323 321
And a light receiving signal is output.
【０００４】[0004]
【発明が解決しようとする課題】さて、東北新幹線と上
越新幹線においては、上記の軌道測定装置により測定さ
れたレール変位の測定データに、しばしば異常が発生し
ている。異常データは降雨のときに多く発生することが
認められたので、降雨による異常データの発生理由が検
討された。その概要を図３により説明する。まず、東北
および上越新幹線は降雪が多く、その対策のため東海道
新幹線の場合に比較して、光学系３の高さを昂上するこ
とが必要とされた。図３において、筐体４の底面42のレ
ール１に対する高さＨは、東海道新幹線の場合は約２０
ｃｍであるが、東北および上越新幹線においては、２倍
の約４０ｃｍである。これに比例して光学系３の各部の
寸法も拡張することが必要となり、筐体４の長さＬと、
各投光部31と各受光部32のスリット315,325 の幅ｗ（ス
リットの長さも）が、それぞれ２倍に拡張されている。
いま降雨中に、検測車が矢印Ｃの方向に走行するとす
る。長さＬが拡張された筐体４の底面42には、雨滴がそ
の分だけ多く付着し、漸次に集合して●で示す大粒で多
量の水滴５となり、検測車の走行により底面42をフロー
してスリット316に到達する。スリット316 は幅ｗと長
さが拡張されたため、水滴５が侵入し易く、一方、検測
車の走行により床下には風が激しく渦巻いており、渦巻
く風につられて水滴５はスリット316 を通して鏡筒311
に侵入する。侵入した水滴５はガラス板314 に付着して
照射光ＬT が散乱し、レール１に照射された光帯２は所
定の幅とならず、ボケが生ずる。一方、受光部32におい
ても事情は同じで、底面42に付着した多量の水滴５が、
幅ｗと長さが拡張されたスリット325 を通って鏡筒321
内に侵入し、ガラス板323 に付着する。これにより、上
記によりボケた光帯２の映像がさらにボケるため、変位
が正確に測定できず、上記の異常データの原因となるこ
とが判明した。これに対して、光学系３に対する水滴５
の侵入を防止する有効な手段が必要とされている。この
発明は、以上に鑑みてなされたもので、光学系３に対す
る水滴５の侵入を防止する有効な装置を提供することを
目的とする。On the Tohoku Shinkansen and Joetsu Shinkansen, abnormalities often occur in the rail displacement measurement data measured by the above-mentioned track measuring device. Since abnormal data was found to occur frequently during rainfall, the reason for the occurrence of abnormal data due to rainfall was examined. The outline will be described with reference to FIG. First, the Tohoku and Joetsu Shinkansens have a lot of snowfall, and it was necessary to raise the height of the optical system 3 as compared with the case of the Tokaido Shinkansen for the measures. In FIG. 3, the height H of the bottom surface 42 of the housing 4 with respect to the rail 1 is about 20 in the case of the Tokaido Shinkansen.
cm for the Tohoku and Joetsu Shinkansen, twice as large as about 40 cm. It is necessary to increase the size of each part of the optical system 3 in proportion to this, and the length L of the housing 4 and
The width w (also the length of the slit) of each of the slits 315 and 325 of each of the light projecting units 31 and each of the light receiving units 32 is doubled.
Now, it is assumed that the inspection vehicle runs in the direction of arrow C during rain. On the bottom surface 42 of the housing 4 having the extended length L, the raindrops adhere by that much and gradually gather to form large and large water droplets 5 indicated by ●. It flows and reaches the slit 316. Since the width and the length of the slit 316 are expanded, the water droplet 5 can easily penetrate. On the other hand, the wind is swirling beneath the floor due to the running of the inspection vehicle. Cylinder 311
Invade. Invading water droplets 5 scatter irradiation light L T adhered to the glass plate 314, the light band 2, which is irradiated to the rail 1 does not become a predetermined width, blur occurs. On the other hand, the situation is the same in the light receiving section 32, and the large amount of water droplets 5 attached to the bottom surface 42
The lens barrel 321 passes through the slit 325 having an increased width w and length.
And adheres to the glass plate 323. As a result, it has been found that the image of the optical band 2 which is blurred as described above is further blurred, so that the displacement cannot be measured accurately, which causes the abnormal data. On the other hand, the water drops 5 on the optical system 3
There is a need for effective means of preventing the intrusion of spills. The present invention has been made in view of the above, and an object of the present invention is to provide an effective device for preventing the water droplet 5 from entering the optical system 3.
【０００５】[0005]
【課題を解決するための手段】この発明は、軌道測定装
置の光学系の水滴防止装置であって、上記の光学式軌道
測定装置の、２組の光学系の各投光部と各受光部の各ス
リットの両側に、軌道検測車の走行中に、降雨により筐
体の底面に付着してフローする水滴を遮断し、筐体の左
右に誘導して外方に排出する、適当な高さの壁と溝を有
する水滴防止具をそれぞれ設け、各水滴防止具により、
水滴が各スリットを通して各投光部と各受光部の内部に
侵入するのを防止するものである。SUMMARY OF THE INVENTION The present invention is directed to a water drop preventing device for an optical system of an orbit measuring device, wherein each light projecting portion and each light receiving portion of two sets of optical systems of the above optical orbit measuring device. On both sides of each slit, during running of the track inspection car, it blocks raindrops that adhere to the bottom of the housing due to rainfall and flow, guide to the left and right sides of the housing, and discharge to the outside. A water drop prevention device having a wall and a groove is provided, respectively, and with each water drop prevention device,
This is to prevent water droplets from entering the insides of the light projecting units and the light receiving units through the slits.
【０００６】[0006]
【作用】上記の水滴防止装置においては、軌道検測車の
走行中に、降雨により筐体の底面に付着してフローする
水滴は、各投光部と各受光部のスリットの両側にそれぞ
れ設けられた各水滴防止具の、適当な高さの壁と溝によ
り遮断され、筐体の左右に誘導されて外方に排出される
ので、水滴が各スリットを通して各投光部と各受光部の
内部に侵入するのが防止される。In the above-described water droplet prevention device, water droplets adhering to the bottom surface of the housing due to rainfall and flowing during the traveling of the track inspection vehicle are provided on both sides of the slit of each light emitting portion and each light receiving portion. Each water drop prevention device is blocked by the appropriate height walls and grooves, guided to the left and right sides of the housing, and discharged to the outside, so that water droplets pass through each slit and reach each of the light projecting unit and each light receiving unit. Intrusion into the inside is prevented.
【０００７】[0007]
【実施例】図１はこの発明の一実施例を示し、(a) は光
学系３に対する水滴防止具６配置を示す側面図、(b) は
水滴防止具６の平面図である。1A and 1B show an embodiment of the present invention, in which FIG. 1A is a side view showing the arrangement of a water droplet preventing device 6 with respect to an optical system 3, and FIG. 1B is a plan view of the water droplet preventing device 6.
【０００８】図１(a),(b) において、光学系３は東北ま
たは上越新幹線に使用されている寸法のものとする。前
記した図３と同様に、２組の光学系３Ａ，３Ｂの、各投
光部31Ａ，31Ｂと各受光部32Ａ，32Ｂは、それぞれの鏡
筒311,321 の内部にガラス板314,323 が固定され、先端
にスリット板315,324 を有する。各スリット板315,324
のスリット316,325 は、幅ｗで長さｌとする。各鏡筒31
1,321 は、光軸を各レールに対して斜め４５°の方向と
して、対称的に筐体４の底面42にそれぞれ固定されてい
る。この発明においては、上記の各光学系３Ａ，３Ｂに
対して水滴防止具６を図示の位置に配置する。水滴防止
具６は、適当なプラスチックスにより形成され、それぞ
れ断面図に示すように、両側の壁ｐ，ｑの間に溝ｒを有
し、両端が各スリット316,325 をカバーできるＬ形の防
止具61と、両側の壁ｓ，ｔの間に溝ｕを有し、各スリッ
トの長さｌよりやや長い寸法の直線形の防止具61よりな
る。各スリット316,325 に対して、図(b) に示すよう
に、それぞれの外側に防止具61Ａ，61Ｂを固定し、それ
ぞれの内側に防止具62Ａ，62Ｂを固定して構成される。In FIGS. 1 (a) and 1 (b), the optical system 3 is of a size used for the Tohoku or Joetsu Shinkansen. As in FIG. 3 described above, each of the light projecting units 31A and 31B and each of the light receiving units 32A and 32B of the two sets of optical systems 3A and 3B have glass plates 314 and 323 fixed inside respective lens barrels 311 and 321, respectively. Have slit plates 315 and 324. Each slit plate 315,324
Have a width w and a length l. Each lens barrel 31
1,321 are symmetrically fixed to the bottom surface 42 of the housing 4 with the optical axis inclined at 45 ° to each rail. In the present invention, the water droplet preventing device 6 is arranged at the position shown in the drawing for each of the optical systems 3A and 3B. The water droplet preventive device 6 is formed of a suitable plastics, and has a groove r between the walls p and q on both sides as shown in the cross-sectional views, and an L-shaped preventive device capable of covering both slits 316 and 325 at both ends. It comprises a linear prevention device 61 having a groove u between walls 61 and s, t on both sides, and having a dimension slightly longer than the length l of each slit. For each of the slits 316 and 325, as shown in FIG. 6B, the protection members 61A and 61B are fixed on the outside and the protection members 62A and 62B are fixed on the inside.
【０００９】以下、上記の水滴防止具６の作用を説明す
る。軌道検測車は矢印Ｃの方向に走行するとし、降雨が
あると雨滴が筐体４の底面42に付着し、これが集合して
多量の水滴５となって底面42をフローする。フローした
水滴５は、大部分が防止具61Ａの壁ｐにより遮断され、
一部は壁ｐを乗り越えで溝ｒに入り、これらは斜め方向
に誘導されて矢印ｆ1,ｆ2 により筐体４の外方に排出さ
れる。また、各受光部32においては、投光部と受光部の
中間で底面42に付着した水滴５は、大部分が防止具62Ｂ
の壁ｓに遮断され、一部は溝ｕに入り、これらは矢印ｆ
3,ｆ4 により外方に排出される。これらにより、水滴５
が各スリット316,325 を通して、鏡筒311,321 の内部に
侵入することが防止される。上記に対して、軌道検測車
の走行が反対方向のときは、上記と同様に、各受光部32
に対する水滴５は、防止具61Ｂにより筐体４の外方に排
出され、各投光部31に対する水滴５は、防止具62Ａによ
り、やはり外方に排出されて鏡筒321,311 の内部に侵入
しない。以上により、水滴５は各鏡筒311,321 に侵入し
ないので、各ガラス板314,323に付着せず、各投光部31
によるレール１Ａ，１Ｂの光帯２と、各受光部32が受光
した光帯２の映像の、いずれにもボケが生ぜず、両レー
ル１Ａ，１Ｂの変位がそれぞれ正確に測定される。The operation of the above-described water droplet preventing device 6 will be described below. It is assumed that the track inspection vehicle travels in the direction of arrow C. When there is rainfall, raindrops adhere to the bottom surface 42 of the housing 4, and the raindrops gather to form a large amount of water drops 5 and flow on the bottom surface 42. Most of the flowed water droplets 5 are blocked by the wall p of the preventive device 61A,
Some of them enter the groove r over the wall p, and these are guided obliquely and discharged to the outside of the housing 4 by arrows f 1 and f 2 . In each of the light receiving sections 32, most of the water droplets 5 attached to the bottom surface 42 between the light emitting section and the light receiving section are prevented.
Are partially blocked by the wall s, and partly enters the groove u.
3, and it is discharged to the outside through f 4. By these, water drops 5
Through the slits 316, 325 and into the lens barrels 311, 321 is prevented. On the other hand, when the traveling of the track inspection vehicle is in the opposite direction, the
The water droplet 5 for the light projecting part 31 is discharged to the outside of the housing 4 by the prevention member 61B, and the water droplet 5 for the light projecting portion 31 is also discharged to the outside by the prevention member 62A and does not enter the inside of the lens barrels 321, 311. As described above, since the water drops 5 do not enter the lens barrels 311,321, they do not adhere to the glass plates 314,323, and the light projecting portions 31
No blur occurs in the optical band 2 of the rails 1A and 1B and the image of the optical band 2 received by each light receiving unit 32, and the displacement of both rails 1A and 1B is accurately measured.
【００１０】[0010]
【発明の効果】以上の説明のとおり、この発明による水
滴防止装置においては、各投光部と各受光部の各スリッ
トの両側に、適当な高さの壁と溝を有する水滴防止具を
それぞれ設け、軌道検測車の走行中に、降雨により筐体
の底面に付着してフローする水滴は、水滴防止具の壁と
溝により遮断され、筐体の左右に誘導されて外方に排出
されるので、水滴が各スリットを通して各投光部と各受
光部の内部に侵入するのが防止されるもので、投光部に
よるレールの光帯と、受光部が受光した光帯の映像の、
いずれにもボケが生ぜず、左右のレールの変位が正確に
測定され、軌道測定装置の信頼性の向上に寄与するとこ
ろには大きいものがある。As described above, in the water drop preventing device according to the present invention, the water drop preventing tools having walls and grooves of appropriate height are provided on both sides of each slit of each light projecting section and each light receiving section. During running of the track inspection vehicle, water drops adhering to the bottom surface of the housing due to rainfall and flowing are blocked by the walls and grooves of the water droplet prevention device, guided to the left and right sides of the housing, and discharged to the outside Therefore, water droplets are prevented from entering the inside of each light emitting portion and each light receiving portion through each slit, and the light band of the rail by the light emitting portion and the image of the light band received by the light receiving portion,
In any case, no blur occurs, and the displacement of the left and right rails is accurately measured, which greatly contributes to the improvement of the reliability of the track measuring device.
【図１】 この発明の一実施例を示し、(a) は光学系３
に対する水滴防止具６配置を示す側面図、(b) は水滴防
止具６の平面図である。FIG. 1 shows an embodiment of the present invention, wherein FIG.
FIG. 3B is a side view showing the arrangement of the water droplet preventing device 6 with respect to FIG.
【図２】 光学式軌道測定装置の光学系３の構成を示
し、(a) は平面図、(b) は側面図、(c) はレール１に照
射された光帯２を示す。2A and 2B show the configuration of an optical system 3 of the optical trajectory measuring apparatus, wherein FIG. 2A is a plan view, FIG. 2B is a side view, and FIG.
【図３】 降雨の水滴５による異常な測定データの発生
を説明する、光学系の垂直断面図である。FIG. 3 is a vertical cross-sectional view of an optical system illustrating generation of abnormal measurement data due to raindrops 5;
１，１Ａ，１Ｂ…レール、２…光帯、３，３Ａ，３Ｂ…
光学系、31, 31Ａ，31Ｂ…投光部、32, 32Ａ，32Ｂ…受
光部 311,321 …鏡筒、312 …光源、313 …レンズ、322 …光
電変換器、314,323 …ガラス板、315,324 …スリット
板、316,325 …スリット、４…筐体、41…仕切り板、42
…底面、５…水滴、６…水滴防止具、61, 61Ａ，61Ｂ，
62, 62Ａ，62Ｂ…防止具、ＬT …照射光、ＬR …反射
光、ｗ…スリットの幅、ｌ…スリットの長さ、ｐ，ｑ，
ｓ，ｔ…壁、ｒ，ｕ…溝、ｆ1,ｆ2,ｆ3,ｆ4 …水滴のフ
ローを示す矢印。1, 1A, 1B ... rail, 2 ... light band, 3, 3A, 3B ...
Optical system, 31, 31A, 31B Projector, 32, 32A, 32B ... Light receiver 311,321 ... Barrel, 312 ... Light source, 313 ... Lens, 322 ... Photoelectric converter, 314,323 ... Glass plate, 315,324 ... Slit plate, 316,325… Slit, 4… Housing, 41… Partition plate, 42
... Bottom surface, 5 ... Drip, 6 ... Drip prevention device, 61, 61A, 61B,
62, 62A, 62B ... preventer, L T ... irradiation light, L R ... reflected light, w ... width of the slit, l ... length of the slit, p, q,
s, t ... wall, r, u ... groove, f 1, f 2, f 3, f 4 ... arrows indicating the flow of water droplets.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G01B 11/00 - 11/30 B60S 1/60 B61K 9/08 E01B 35/00 - 35/06 G01B 21/00 - 21/32──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 6 , DB name) G01B 11/00-11/30 B60S 1/60 B61K 9/08 E01B 35/00-35/06 G01B 21 / 00-21/32
Claims (1)
右の各レールに対応した、投光部と受光部よりなる光学
系を２組配設し、該各投光部と各受光部のそれぞれにス
リットを有するスリット板を設け、該各投光部よりの光
束を該スリットを通して前記各レールの頭部に光帯をそ
れぞれ照射し、該光帯の反射光を該スリットを通して該
各受光部によりそれぞれ受光し、該受光信号により前記
各レールの変位を測定する光学式軌道測定装置におい
て、前記各投光部と各受光部の各スリットの両側に、前
記軌道検測車の走行中に、降雨により前記筐体の底面に
付着してフローする水滴を遮断し、前記筐体の左右に誘
導して外方に排出する、適当な高さの壁と溝を有する水
滴防止具をそれぞれ設け、該各水滴防止具により、該水
滴が前記各スリットを通して前記各投光部と各受光部の
内部に侵入するのを防止することを特徴とする、軌道測
定装置の光学系の水滴防止装置。1. An optical system comprising a light emitting unit and a light receiving unit corresponding to each of left and right rails is provided in a housing provided under the floor of a track inspection vehicle, and each of the light emitting units and A slit plate having a slit is provided in each of the light receiving units, a light beam from each of the light projecting units is irradiated with a light band to the head of each of the rails through the slit, and reflected light of the light band is passed through the slit. In an optical trajectory measuring device which receives light by each light receiving unit and measures the displacement of each rail by the light receiving signal, the traveling of the track inspection vehicle is provided on both sides of each of the light projecting unit and each slit of each light receiving unit. Inside, a water droplet prevention device having a wall and a groove of an appropriate height, which blocks water droplets attached to the bottom surface of the housing due to rainfall and flows, and guides the housing to the left and right and discharges outward. Provided, and the water droplet preventing tools allow the water droplets to pass through the slits. A water droplet preventing device for an optical system of the trajectory measuring device, wherein the water droplet is prevented from penetrating into the inside of each of the light projecting unit and each of the light receiving units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5075357A JP2772898B2 (en) | 1993-03-09 | 1993-03-09 | Water drop prevention device for optical system of orbit measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5075357A JP2772898B2 (en) | 1993-03-09 | 1993-03-09 | Water drop prevention device for optical system of orbit measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06258044A JPH06258044A (en) | 1994-09-16 |
| JP2772898B2 true JP2772898B2 (en) | 1998-07-09 |
Family
ID=13573903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5075357A Expired - Lifetime JP2772898B2 (en) | 1993-03-09 | 1993-03-09 | Water drop prevention device for optical system of orbit measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2772898B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199141A (en) * | 2021-12-07 | 2022-03-18 | 吉林大学 | Device and method for detecting left-right height difference of automobile body based on stereoscopic vision |
-
1993
- 1993-03-09 JP JP5075357A patent/JP2772898B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06258044A (en) | 1994-09-16 |
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