JPH0363612A - Sub-mirror supporting post of antenna device - Google Patents
Sub-mirror supporting post of antenna deviceInfo
- Publication number
- JPH0363612A JPH0363612A JP20050489A JP20050489A JPH0363612A JP H0363612 A JPH0363612 A JP H0363612A JP 20050489 A JP20050489 A JP 20050489A JP 20050489 A JP20050489 A JP 20050489A JP H0363612 A JPH0363612 A JP H0363612A
- Authority
- JP
- Japan
- Prior art keywords
- secondary mirror
- sub
- mirror
- mirror part
- supporting posts
- 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
Landscapes
- Mounting And Adjusting Of Optical Elements (AREA)
Abstract
Description
〔産業上の利用分野Ｊ
この発明は空中線装置の主鏡部と副鏡部の相対位置及び
相対角度を維持する副鏡支持柱に関するものである。
〔従来の技術Ｊ
第４図は空中線装置の概要図であり、図において（１）
は主鏡部、（２）は副鏡部、（３）は主鏡部（１）と副
鏡部（２）の相対位置及び相対角度関係を維持する副鏡
支持柱である。この副鏡支持柱（３）は普通は３本ある
。また第５図は副鏡支持柱の断面図であり、図において
（４）は副鏡支持柱の表面材として、鉄板からなる楕円
パイプである。
次に動作について説明する。電波を反射しかつ副鏡部（
２）に向って集束させる主鏡部（１）と、主鏡部（１）
から来に電波をさらに次の部分に向かって反射集束させ
る副鏡部（２）とを、断面が楕円形状をした鉄製のパイ
プからなる３本の副鏡支持柱（３）によって固定するこ
とにより、主鏡部（１）と副鏡部（２）の相対位置およ
び相対角度を維持することができる。
〔発明が解決しようとする課題Ｊ
従来の副鏡支持柱は材料が鉄であり、その線膨張率が大
きいため、３本の副鏡支持柱（３）に不均等に日射が当
たった場合、３本の副鏡支持柱（３）の間の伸びに差が
生じ、それによって、主鏡部（１）と副鏡部（２）の相
対位置および相対角度のずれが大きくなるという問題点
があった。
この発明は上記のような問題点を解消するためになされ
たもので、副鏡支持柱の材料を線膨張率が鉄よりも小さ
いものに変えることによって、３本の副鏡支持柱（３）
の間の伸びの差を小さくし、それによって主鏡部（１）
と副鏡部（２）の相対位置および相対角度のずれを小さ
くすることを目的とする。
〔課題を解決するための手段］
この発明に係る副鏡支持柱は材料を線膨張率が鉄の約半
分である炭素繊維強化プラスチックにしたものである。
〔作用１
この発明における副鏡支持柱の材料の炭素繊維強化プラ
スチックは線膨張率が鉄の約半分であるため、日射によ
る副鏡支持柱の伸びが鉄の場合の約半分になる。
〔実施例］
以下この発明の一実施例を第１図について説明する０図
において、（５）は本発明による副鏡支持柱の表面材と
してのＣＦＲＰ （炭素繊維強化プラスチック）である
。
電波を反射して集束させる主鏡部（１）と、主鏡部（１
）から来た電波をさらに次の部分に向って反射集束させ
る副鏡部（２）とを、断面が楕円パイプ形状をした線膨
張率の小さいＣＦＲＰ Ｃ炭素繊維強化プラスチック）
製の３本の副鏡支持柱によって固定することにより、日
射によって各副鏡支持柱間に温度差が生じる場合でも鉄
製の副鏡支持柱よりも精度良く主鏡部（１）と副鏡部（
２）の相対位置および相対角度を維持できる。
りなお上記実施例では断面形状が、楕円パイプ形状のも
のを示したが第２図に示す様に楕円パイプ内にハニカム
コア（６）がはめこまれた断面形状のＣＦＲＰ製副鏡支
持柱でも良い、電波を反射しかつ副鏡部（２）に向って
集束させる主鏡部（１）と、主鏡部（１）から来た電波
をさらに次の部分に向って反射集束させる副鏡部（２）
を断面が楕円バイブ内にハニカムコア（６）がはめこま
れている形状をした線膨張率の小さいＣＦＲＰ製の３本
の副鏡支持柱によって固定することにより、日射によっ
て各副鏡支持柱間に温度差が生じる場合でも、鉄製の副
鏡支持柱よりも精度良く、主鏡部（１）と副鏡部（２）
の相対位置および相対角度を維持できる。この第２図に
よれば風による楕円断面形状の変形が第１図よりも少な
くなり、風による副鏡支持柱の剛性の低下を抑えられる
。
２）また、上記実施例では断面形状が楕円パイプ形状の
ものを示したが、第３図に示す様に、楕円パイプ内に発
泡スチロール（７）が充填されている断面形状のＣＦＲ
Ｐ製副鏡支持柱でも良い、電波を反射しかつ副鏡部（２
）に向って集束させる主鏡部（１）と主鏡部（１）から
来た電波をさらに次の部分に向って反射集束させる副鏡
部（２）を、断面が楕円パイプ内に発泡スチロールが充
填された形状をした線膨張率の小さいＣＦＲＰ製の３本
の副鏡支持柱によって固定することにより、日射によっ
て各副鏡支持柱間に温度差が生じる場合でも、鉄製の副
鏡支持柱よりも精度良く、主鏡部（１）と副鏡部（２）
の相対位置および相対角度を維持できる。この第３図に
よれば、風による楕円断面形状の変形が第１図よりも少
なくなり風による副鏡支持柱の剛性の低下を抑えられる
。[Industrial Field of Application J This invention relates to a secondary mirror support column that maintains the relative position and relative angle of a primary mirror portion and a secondary mirror portion of an antenna device. [Prior art J Figure 4 is a schematic diagram of an antenna device, and in the figure (1)
is a primary mirror part, (2) is a secondary mirror part, and (3) is a secondary mirror support column that maintains the relative position and relative angle relationship between the primary mirror part (1) and the secondary mirror part (2). There are usually three secondary mirror support columns (3). FIG. 5 is a sectional view of the secondary mirror support column, and in the figure (4) is an elliptical pipe made of an iron plate as the surface material of the secondary mirror support column. Next, the operation will be explained. Reflects radio waves and has a secondary mirror section (
2) a primary mirror unit (1) that focuses the beam toward the primary mirror unit (1);
By fixing the secondary mirror part (2), which reflects and focuses the radio waves further toward the next part, with three secondary mirror support columns (3) made of iron pipes with an elliptical cross section. , the relative position and relative angle of the primary mirror section (1) and the secondary mirror section (2) can be maintained. [Problem to be solved by the invention J] Conventional secondary mirror support columns are made of iron and have a large coefficient of linear expansion, so if the three secondary mirror support columns (3) are unevenly hit by sunlight, A problem arises in that there is a difference in elongation between the three secondary mirror support columns (3), which increases the relative position and relative angle deviation between the primary mirror part (1) and the secondary mirror part (2). there were. This invention was made to solve the above-mentioned problems, and by changing the material of the secondary mirror support pillars to one with a coefficient of linear expansion smaller than that of iron, the three secondary mirror support pillars (3)
By reducing the difference in elongation between the primary mirror section (1) and
The purpose is to reduce deviations in the relative positions and angles of the mirror and the secondary mirror section (2). [Means for Solving the Problems] The secondary mirror support column according to the present invention is made of carbon fiber reinforced plastic whose coefficient of linear expansion is about half that of iron. [Effect 1] Since the carbon fiber reinforced plastic used as the material for the secondary mirror support column in this invention has a coefficient of linear expansion about half that of iron, the elongation of the secondary mirror support column due to solar radiation is about half that of iron. [Example] In Figure 0, an example of the present invention will be described below with reference to Figure 1, (5) is CFRP (carbon fiber reinforced plastic) as the surface material of the secondary mirror support column according to the present invention. A primary mirror unit (1) that reflects and focuses radio waves, and a primary mirror unit (1) that reflects and focuses radio waves.
) to further reflect and focus the radio waves coming from ) to the next part.
By fixing the secondary mirror with three steel secondary mirror support columns, the primary mirror part (1) and the secondary mirror part can be fixed more accurately than iron secondary mirror support columns even when there is a temperature difference between the secondary mirror support columns due to solar radiation. (
2) The relative position and relative angle can be maintained. Although the above example shows a case where the cross-sectional shape is an elliptical pipe, it is also possible to use a CFRP secondary mirror support column with a cross-sectional shape in which a honeycomb core (6) is fitted into an elliptical pipe as shown in Fig. 2. A primary mirror part (1) that reflects and focuses radio waves toward a secondary mirror part (2), and a secondary mirror part that reflects and focuses radio waves coming from the primary mirror part (1) further toward the next part. (2)
By fixing it with three secondary mirror support pillars made of CFRP with a low coefficient of linear expansion and having a honeycomb core (6) fitted into a vibrator with an elliptical cross section, the space between each secondary mirror support pillar is fixed by solar radiation. Even when there is a temperature difference between the primary mirror part (1) and the secondary mirror part (2), it is more accurate than a steel secondary mirror support column.
The relative position and relative angle of can be maintained. According to FIG. 2, the deformation of the elliptical cross-sectional shape due to the wind is less than that in FIG. 1, and the decrease in rigidity of the secondary mirror support column due to the wind can be suppressed. 2) In addition, in the above embodiment, the cross-sectional shape is an oval pipe shape, but as shown in FIG.
A secondary mirror support column made of P may also be used, which reflects radio waves and supports the secondary mirror part (2
) and the secondary mirror part (2) which reflects and focuses the radio waves coming from the primary mirror part (1) towards the next part. By fixing the secondary mirror with three filled-shaped CFRP support pillars with a low coefficient of linear expansion, even if there is a temperature difference between the secondary mirror support pillars due to solar radiation, it will be more stable than the iron secondary mirror support pillars. Both the primary mirror part (1) and the secondary mirror part (2) have good accuracy.
The relative position and relative angle of can be maintained. According to FIG. 3, the deformation of the elliptical cross-sectional shape due to the wind is less than that in FIG. 1, and the decrease in rigidity of the secondary mirror support column due to the wind can be suppressed.
以上のように、この発明によれば、副鏡支持柱の材料を
鉄からＣＦＲＰ （炭素繊維強化プラスチック）に変更
したので、日射の影響による主鏡部と副鏡部の相対位置
および相対角度のずれが約半分になる効果がある。As described above, according to the present invention, since the material of the secondary mirror support column is changed from iron to CFRP (carbon fiber reinforced plastic), the relative position and relative angle of the primary mirror part and the secondary mirror part due to the influence of solar radiation can be reduced. This has the effect of reducing the deviation by about half.
第１図はこの発明の一実施例による副鏡支持柱の断面形
状図、第２図はこの発明の他の実施例を示す断面形状図
、第３図はこの発明の更に他の実施例を示す断面形状図
、第４図は空中線装置を示す概要図、第５図は従来の副
鏡支持柱の断面形状図である。
図において（１）は主鏡部、（２）は副鏡部、（３）は
副鏡支持柱、（４）は鉄製の表面材、（５）はＣＦＲＰ
（炭素繊維強化プラスチック）製の表面材、（６）は
ハニカムコア、（７）は発泡スチロールである。
なお図中同一符号は同−又は相当部分を示す。FIG. 1 is a cross-sectional view of a secondary mirror support column according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing another embodiment of the invention, and FIG. FIG. 4 is a schematic diagram showing an antenna device, and FIG. 5 is a cross-sectional diagram of a conventional secondary mirror support column. In the figure, (1) is the primary mirror, (2) is the secondary mirror, (3) is the secondary mirror support column, (4) is iron surface material, and (5) is CFRP.
(carbon fiber reinforced plastic) surface material, (6) is a honeycomb core, and (7) is foamed polystyrene. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
と副鏡部との間に位置した副鏡支持柱であって、線膨張
率が鉄の約半分である炭素繊維強化プラスチック材を楕
円パイプ断面の表面材に用いることにより、不均等な日
射によって温度差が生じる場合でも鉄製の表面材を用い
たものよりも精度よく、主鏡部と副鏡部の相対位置およ
び相対角度を維持できるようになしたことを特徴とする
副鏡支持柱。(1) The secondary mirror support column is located between the primary and secondary mirror sections of the antenna device that reflect and focus radio waves on each other, and is made of carbon fiber-reinforced plastic material whose coefficient of linear expansion is approximately half that of steel. By using it as a surface material for the cross section of an elliptical pipe, it maintains the relative position and angle of the primary mirror and secondary mirror more accurately than iron surface materials, even when temperature differences occur due to uneven solar radiation. A secondary mirror support pillar that is characterized by being able to do so.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20050489A JPH0363612A (en) | 1989-08-01 | 1989-08-01 | Sub-mirror supporting post of antenna device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20050489A JPH0363612A (en) | 1989-08-01 | 1989-08-01 | Sub-mirror supporting post of antenna device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0363612A true JPH0363612A (en) | 1991-03-19 |
Family
ID=16425415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20050489A Pending JPH0363612A (en) | 1989-08-01 | 1989-08-01 | Sub-mirror supporting post of antenna device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0363612A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0628819U (en) * | 1992-09-17 | 1994-04-15 | 関西電力株式会社 | Reflector support device |
| US7002524B1 (en) | 2004-09-28 | 2006-02-21 | Lang Mekra, North America, Llc | Conductive bracket mount for mirror and antenna assemblies |
-
1989
- 1989-08-01 JP JP20050489A patent/JPH0363612A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0628819U (en) * | 1992-09-17 | 1994-04-15 | 関西電力株式会社 | Reflector support device |
| US7002524B1 (en) | 2004-09-28 | 2006-02-21 | Lang Mekra, North America, Llc | Conductive bracket mount for mirror and antenna assemblies |
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