JPS62184407U - - Google Patents

Info

Publication number
JPS62184407U
JPS62184407U JP7364386U JP7364386U JPS62184407U JP S62184407 U JPS62184407 U JP S62184407U JP 7364386 U JP7364386 U JP 7364386U JP 7364386 U JP7364386 U JP 7364386U JP S62184407 U JPS62184407 U JP S62184407U
Authority
JP
Japan
Prior art keywords
image sensor
frequency component
gauge marks
lens
extensometer
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
Application number
JP7364386U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP7364386U priority Critical patent/JPS62184407U/ja
Publication of JPS62184407U publication Critical patent/JPS62184407U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の実施例の構成を示すブロツク
図、第２図ａ，ｂは回路中の各部波形を説明する
図、第３図イ，ロはレンズのピントの適否により
ビデオ信号の周波数成分が異なることを説明する
図である。 １……試験片、２……標点マーク、３……追跡
カメラ、５……レンズ、６……ＣＣＤイメージ・
センサ、１１……微分回路、１３〜１８……コン
パレータ、２１……ＣＰＵ。 Fig. 1 is a block diagram showing the configuration of an embodiment of the present invention, Fig. 2 a and b are diagrams explaining the waveforms of each part in the circuit, and Fig. 3 a and b show the frequency of the video signal depending on the suitability of the focus of the lens. It is a figure explaining that a component is different. 1... Test piece, 2... Gauge mark, 3... Tracking camera, 5... Lens, 6... CCD image
Sensor, 11... Differential circuit, 13-18... Comparator, 21... CPU.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 試験片に明暗のコントラストをつけて表示され
た標点マークをレンズによつてイメージ・センサ
上に結像させ、該イメージ・センサによつて標点
マークを読み取り標点間の変位を検出するように
した伸び計であつて、イメージ・センサから出力
されるビデオ信号の周波数成分を検出する周波数
成分検出手段と、該周波数成分検出手段から出力
される検出信号に基づいてレンズのピント合わせ
が適切か否かを演算し判断する演算手段とを備え
てなる伸び計。 The gauge marks displayed on the test piece with bright and dark contrast are imaged onto an image sensor using a lens, and the image sensor reads the gauge marks and detects the displacement between the gauge marks. The extensometer is equipped with a frequency component detection means for detecting the frequency component of the video signal output from the image sensor, and whether the lens is properly focused based on the detection signal output from the frequency component detection means. An extensometer comprising calculation means for calculating and determining whether or not the
JP7364386U 1986-05-15 1986-05-15 Pending JPS62184407U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7364386U JPS62184407U (en) 1986-05-15 1986-05-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7364386U JPS62184407U (en) 1986-05-15 1986-05-15

Publications (1)

Publication Number Publication Date
JPS62184407U true JPS62184407U (en) 1987-11-24

Family

ID=30918154

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7364386U Pending JPS62184407U (en) 1986-05-15 1986-05-15

Country Status (1)

Country Link
JP (1) JPS62184407U (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5338343A (en) * 1976-09-20 1978-04-08 Seiko Epson Corp Display device
JPS56132313A (en) * 1980-03-19 1981-10-16 Fuji Photo Film Co Ltd Automatic focusing device
JPS5983115A (en) * 1982-11-02 1984-05-14 Mitsubishi Electric Corp Optical type automatic focusing device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5338343A (en) * 1976-09-20 1978-04-08 Seiko Epson Corp Display device
JPS56132313A (en) * 1980-03-19 1981-10-16 Fuji Photo Film Co Ltd Automatic focusing device
JPS5983115A (en) * 1982-11-02 1984-05-14 Mitsubishi Electric Corp Optical type automatic focusing device

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