JPH02128509U

JPH02128509U -

Info

Publication number: JPH02128509U
Application number: JP2972290U
Authority: JP
Priority date: 1990-03-23
Filing date: 1990-03-23
Publication date: 1990-10-23
Anticipated expiration: 2003-07-22
Also published as: JPH0528483Y2

Description

[Brief explanation of drawings]

第１図は平ドリルの正面図、第２図はその側面
図、第３図はこの考案の一実施例の構成図、第４
図および第５図は平ドリルの刃部の影の太さを説
明する説明図、第６図は第３図の電気回路ブロツ
ク図、第７図はイメージセンサ上に投影される影
の経時的変化説明図、第８図は回転中心軸がぶれ
た状態の影の経時的変化説明図、第９図はコンパ
レータの出力信号図、第１０図は頭合わせ回路の
出力信号図、第１１図はシフトレジスタの出力信
号図、第１２図、第１３図および第１４図は測定
対象となる平ドリルの説明図である。７，８……回転ローラ、９……平ドリル、１０
……リニアイメージセンサ、１０ａ……受光面、
１０ｂ……イメージセンサ素子列、１４……アン
プ、１５……コンパレータ、１６……頭合わせ回
路、１７……オアゲート、１８……アンドゲート
、１９……シフトレジスタ、２０……計数回路、
２１……数表示回路、２３……タイミング回路。 Figure 1 is a front view of the flat drill, Figure 2 is its side view, Figure 3 is a configuration diagram of an embodiment of this invention, and Figure 4 is a diagram of the configuration of an embodiment of this invention.
Figure 5 and Figure 5 are explanatory diagrams explaining the thickness of the shadow of the blade of the flat drill, Figure 6 is the electric circuit block diagram of Figure 3, and Figure 7 is the time course of the shadow projected on the image sensor. Figure 8 is a diagram explaining the change in shadow over time when the rotation center axis is shaken, Figure 9 is a comparator output signal diagram, Figure 10 is an output signal diagram of the head matching circuit, and Figure 11 is a diagram explaining changes over time. The output signal diagrams of the shift register, FIG. 12, FIG. 13, and FIG. 14 are explanatory diagrams of a flat drill to be measured. 7, 8...Rotating roller, 9...Flat drill, 10
... Linear image sensor, 10a ... Light receiving surface,
10b... image sensor element array, 14... amplifier, 15... comparator, 16... head matching circuit, 17... OR gate, 18... AND gate, 19... shift register, 20... counting circuit,
21... Number display circuit, 23... Timing circuit.

Claims

[Claims for Utility Model Registration] (1) An image sensor that receives light on a light-receiving surface in which a plurality of sensor elements are arranged in a row and outputs a signal only from the sensor elements that receive the light; A flat drill holding/rotating means holds the flat drill parallel to the light receiving surface and perpendicular to the array of sensor elements on the light receiving surface and rotates around an axis; and parallel light is applied to the blade of the flat drill from the side. parallel light projecting means for projecting light and projecting its shadow onto the light-receiving surface of the image sensor; positive/negative conversion means for inputting the output signal of the image sensor and outputting a value of the opposite sign; A signal output circuit for selectively storing and outputting the maximum output from the positive/negative converting means while the flat drill held by the flat drill holding and rotating means rotates at least 180 degrees, and a corresponding blade diameter by the output of this signal output circuit. A flat drill blade diameter measuring device characterized by being equipped with a display circuit that displays. (2) The flat drill blade diameter measuring device according to claim 1, wherein the sensor element of the image sensor is a photodiode.