Title:
APPARATUS OR MEASURING ULTRA-MICRO HARDNESS
Document Type and Number:
Japanese Patent JP3839512
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To correctly detect a shifting point where an indenter touches a sample by calculating a shift-load function by means of a function-calculating means before and after the indenter butts the sample from load data and shift data, and obtaining an intersection of shift-load functions.
SOLUTION: When a sample T is placed on a sample stage 13 and a load current is supplied to a coil 1a from a control circuit 9, indenter 3 starts to descend. At the same time, a relation of a shift and a load is displayed at a display device 30 on the basis of detection signals from a differential transformer 7 and a load-detecting part 11. Data input to the control circuit 9 are digital data. A changing point where the indenter 3 touches the sample T is detected and calculated as a point P1. When the changing point is in the middle of points P1 and P0, the detected changing point includes an error and consequently a hardness measured based on the detected changing point includes an error. In other words, even if the changing point is in the middle of the actual changing point P1 and P0, the changing point can be detected correctly.
Inventors:
Yamamoto Yasunori
Application Number:
JP4293296A
Publication Date:
November 01, 2006
Filing Date:
February 29, 1996
Export Citation:
Assignee:
SHIMADZU CORPORATION
International Classes:
G01N3/42; (IPC1-7): G01N3/42
Domestic Patent References:
| JP5322732A | ||||
| JP363543A | ||||
| JP73386B2 | ||||
| JP5172724A |
Attorney, Agent or Firm:
Toshifumi Kita
Hiroyuki Eguchi
Hiroyuki Eguchi