JPH0478552U

JPH0478552U -

Info

Publication number: JPH0478552U
Application number: JP12173990U
Authority: JP
Priority date: 1990-11-20
Filing date: 1990-11-20
Publication date: 1992-07-08

Description

[Brief explanation of the drawing]

第１図は本考案き裂形状検知プローブの一実施
例の斜視図、第２図は第１図の−に沿つた断
面図、第３図は測定要領の説明図、第４図は無次
元化電位差と無次元化き裂深さとの関係の線図、
第５図は無次元化電位差とき裂深さとの関係の線
図である。第６図は従来のき裂形状検知方法を示
す斜視図、第７図は測定電位差分布の線図である
。１……電圧接触子ケーシング、２……電流接触
子ケーシング、３……ガイド板、４……目盛、５
……マグネツト板、６……接触子ホルダー、７…
…マグネツト板、８……接触子サポート、９……
電圧接触子、１０……ばね台座、１１……ばね、
１２……電流接触子、１３……固定用マグネツト
、１４……ケーブル取出口、１５……電圧ケーブ
ル、１６……電流ケーブル、１７……測定システ
ム、１８……定電流源、１９……切換器、２０…
…マイクロボルトメーター、２１……スキヤナー
、２２……パソコン、２３……データライン、２
４……被測定物。 Figure 1 is a perspective view of an embodiment of the crack shape detection probe of the present invention, Figure 2 is a cross-sectional view taken along - in Figure 1, Figure 3 is an explanatory diagram of the measurement procedure, and Figure 4 is a dimensionless diagram. Diagram of the relationship between dimensional potential difference and dimensionless crack depth,
FIG. 5 is a diagram of the relationship between dimensionless potential difference and crack depth. FIG. 6 is a perspective view showing a conventional crack shape detection method, and FIG. 7 is a diagram of a measured potential difference distribution. 1... Voltage contact casing, 2... Current contact casing, 3... Guide plate, 4... Scale, 5
...Magnetic plate, 6...Contact holder, 7...
...Magnetic plate, 8...Contact support, 9...
Voltage contactor, 10... Spring pedestal, 11... Spring,
12...Current contact, 13...Fixing magnet, 14...Cable outlet, 15...Voltage cable, 16...Current cable, 17...Measuring system, 18...Constant current source, 19...Switching Vessel, 20...
...Microvoltmeter, 21...Scanner, 22...PC, 23...Data line, 2
4...Object to be measured.

Claims

[Scope of utility model registration request]

a long box-shaped voltage contact casing and a current contact casing that intersect in a criss-cross pattern approximately in the center;
a plurality of parallel contact holders housed in the voltage contact casing so as to be movable in the longitudinal direction; and a pair of voltage contacts inserted in each of the contact holders in a lateral direction of the casing so as to be pressable to the outside. , a pair of current contacts inserted in an appropriate position straddling the voltage casing in the current contact casing so as to be pressable to the outside in the same direction as the voltage contacts;
A crack shape detection probe comprising a measurement system connected to the voltage contactor and the current contactor via a cable.