JPS58117403A - Method for measuring diameter - Google Patents
Method for measuring diameterInfo
- Publication number
- JPS58117403A JPS58117403A JP53482A JP53482A JPS58117403A JP S58117403 A JPS58117403 A JP S58117403A JP 53482 A JP53482 A JP 53482A JP 53482 A JP53482 A JP 53482A JP S58117403 A JPS58117403 A JP S58117403A
- Authority
- JP
- Japan
- Prior art keywords
- light
- diameter
- measured
- resistor
- output
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、丸棒状の被測定物の直径を計測するに最適な
直径の計測方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diameter measuring method most suitable for measuring the diameter of a round bar-shaped object to be measured.
従来より、被測定物の直径等を測るKはノギス等が用い
られている。特にノギスは、精度の良さと手軽さとから
多用されている。しかし1周知のようにノギスは主尺と
副尺の組合せによって目盛を読み取るものであるため、
liI&りが見づらく迅速な計測ができな込不便さが
あった。Conventionally, a caliper or the like has been used to measure the diameter of an object to be measured. In particular, calipers are widely used due to their high accuracy and ease of use. However, as is well known, calipers read the scale by a combination of a main scale and a vernier scale, so
It was difficult to see liI and ri and it was difficult to measure quickly, which was inconvenient.
本発明は、高精度で読みIIL#)の寥易な直径の計測
方法を提供するにある。The present invention provides a method for easily measuring the diameter with high accuracy and reading IIL#.
本発明は、オプティカルファイバーが曲げの曲事変化に
より光透過率が変化することを利用して、該オプティカ
ルファイバーを丸棒′状の被測定物の外周に周回し、そ
の周回長に応じて変化する光出力を電気信号に変換し、
直径として表示するものである。The present invention takes advantage of the fact that the light transmittance of an optical fiber changes due to changes in the curvature of the optical fiber, and wraps the optical fiber around the outer periphery of a round rod-shaped object to be measured. converts the optical output into an electrical signal,
It is displayed as a diameter.
WN2図は本発明の具体的実施例を示す構成図である。Figure WN2 is a configuration diagram showing a specific embodiment of the present invention.
発光ダイオード(LED)、レーザーダイオード、白熱
ランプなどを用いた発光部IKオプティカルファイバ2
の一端を接続し、他熾に受光素子を用いた光検出部3が
接続される。受光素子としてはシリコン(St)を用い
た7オトトラ/ジスタあるいはCd8(硫化カドミウム
)を用いた素子等が適用可能である。発光部1および光
検出部3の臭体的回路を示せば112図の如くである。Light emitting part IK optical fiber 2 using light emitting diode (LED), laser diode, incandescent lamp, etc.
One end is connected to the other end, and the other end is connected to a photodetecting section 3 using a light receiving element. As the light-receiving element, it is possible to use a 7Ototra/distor using silicon (St) or an element using Cd8 (cadmium sulfide). The odor body circuit of the light emitting section 1 and the light detecting section 3 is shown in Fig. 112.
発光11S1aLED11!−1sI151M抵抗12
との直列回路に直流電源が印加され、一定の光度で常時
発光しており、オプティカルファイバ2に光伝送される
、一方、光検出部3はフォトダイオード31と出力抵抗
32との直列回路に直流電源が印加され、オプティカル
ファイバ2を経由したLIDIIの光はフォトダイオー
ド31に受光される。フォトダイオード31は受光量に
比例し九電流を流し、抵抗32に電圧降下を生じさせる
。抵抗32の出力電圧を増幅して計器に振らせれば受光
量の変化をアナログ表示することができ、抵抗32の出
力電圧tA/D変換してディジタル表示器を駆動すれば
ディジタル表示が可能である。Light emitting 11S1aLED11! -1sI151M resistor 12
A DC power supply is applied to the series circuit of the photodiode 31 and the output resistor 32, and the light is constantly emitted at a constant luminous intensity, and the light is transmitted to the optical fiber 2. On the other hand, the photodetector 3 applies a DC power to the series circuit of the photodiode 31 and the output resistor 32. Power is applied, and the LID II light that has passed through the optical fiber 2 is received by the photodiode 31 . The photodiode 31 causes a current to flow in proportion to the amount of light received, causing a voltage drop across the resistor 32. If the output voltage of the resistor 32 is amplified and applied to a meter, changes in the amount of light received can be displayed in an analog manner, and if the output voltage of the resistor 32 is converted from tA/D to drive a digital display, a digital display is possible. .
オプティカル7アイパ2(本実施例においては、コア径
710 svn、クラツド径μmのプラスチック製オプ
ティカル7アイパを使用した)は第1図に示すように、
被測定物4の外周に1@轡回し、その際の光出力(受光
出力)値から直径を測定することができる。即ち、第3
図に示すように、被測定物の直径(■)変化に対し、光
検出部3の出力電圧V、は成る範11においてリニアな
比例関係にある。そこで、飽和領域を除い友直線部分を
測定可能域とし1発生電圧V@を既知の直径値で較正し
ておけば、被測定物の直径を表示器に直接表示すること
ができる。The optical 7 eyer 2 (in this example, a plastic optical 7 eyer with a core diameter of 710 svn and a cladding diameter μm was used) is as shown in FIG.
The diameter can be measured by turning the outer circumference of the object to be measured 4 once and from the light output (received light output) value at that time. That is, the third
As shown in the figure, the output voltage V of the photodetector 3 has a linear proportional relationship in a range 11 with respect to a change in the diameter (■) of the object to be measured. Therefore, if the 1-generated voltage V@ is calibrated with a known diameter value by setting the straight line portion as a measurable region excluding the saturated region, the diameter of the object to be measured can be directly displayed on the display.
測定可能範囲の変更は、発光素子、受光素子およびオプ
ティカルファイバー等を適宜交換することにより可能で
あゐ。The measurable range can be changed by appropriately replacing the light emitting element, light receiving element, optical fiber, etc.
なお1以上の説明においては、被測定物の直径を測定す
る場合のみを示したが、上述した如く本発明はオプティ
カル7アイパーの曲事変化による光透過率の変化を利用
するものであるから、被測定物の曲率を測定することも
できる。また、直嫌に円周率を掛算する演算を行なえば
、被測定物の周長を測定することもできる。Note that in the above explanation, only the case of measuring the diameter of the object to be measured has been shown, but as described above, the present invention utilizes changes in light transmittance due to changes in the curvature of the optical 7-eyeper. It is also possible to measure the curvature of an object. Furthermore, by directly multiplying the circumference by pi, the circumference of the object to be measured can be measured.
以上より明らかな如く本発明によれば、丸棒状の被測定
物の直径を簡単に、しかも高精度に測定することができ
る。As is clear from the above, according to the present invention, the diameter of a round bar-shaped object to be measured can be easily and highly accurately measured.
第1図は本発明の具体的実施ガを示す構成図。
[2図は第1図に示し九発光部1および光検出部3を具
体的に示した囲略図、第3図は本発明に係る直径変化に
対すゐ発生電圧特性図である。
1・・・発光部、2・・・オプティカル7アイパ(。
3・・・光検出部、4・・・被測定物、11・・・LE
D。
12.32・・・抵抗、ax・・・フォトトランジスタ
。
代理人 鵜沼辰之
(ほか2名)
第11・1
第2161FIG. 1 is a block diagram showing a specific implementation of the present invention. [FIG. 2 is a schematic diagram specifically showing the light emitting section 1 and the photodetecting section 3 shown in FIG. 1, and FIG. 3 is a diagram showing the generated voltage characteristics with respect to the diameter change according to the present invention. 1... Light emitting section, 2... Optical 7 eyeper (. 3... Light detection section, 4... Measured object, 11... LE
D. 12.32...Resistor, ax...Phototransistor. Agent Tatsuyuki Unuma (and 2 others) 11th 1st 2161st
Claims (1)
円部を伝送した光が他方の端部より受光器に送出される
オプティカルファイバを、被測定物の外周に沿って轡き
其の曲率の変化に応じて変化する出力光の変化から前記
被測定物の直径を測定することを特徴とする直径の計測
方法。0) A fixed amount of light is sent from one end, and the light transmitted through the circular part is sent to the receiver from the other end. A method for measuring a diameter, characterized in that the diameter of the object to be measured is measured from a change in output light that changes in accordance with a change in the object.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53482A JPS58117403A (en) | 1982-01-05 | 1982-01-05 | Method for measuring diameter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53482A JPS58117403A (en) | 1982-01-05 | 1982-01-05 | Method for measuring diameter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58117403A true JPS58117403A (en) | 1983-07-13 |
Family
ID=11476422
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53482A Pending JPS58117403A (en) | 1982-01-05 | 1982-01-05 | Method for measuring diameter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58117403A (en) |
-
1982
- 1982-01-05 JP JP53482A patent/JPS58117403A/en active Pending
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