JPS5523475A - Measuring instrument for indentation hardness - Google Patents
Measuring instrument for indentation hardnessInfo
- Publication number
- JPS5523475A JPS5523475A JP9695278A JP9695278A JPS5523475A JP S5523475 A JPS5523475 A JP S5523475A JP 9695278 A JP9695278 A JP 9695278A JP 9695278 A JP9695278 A JP 9695278A JP S5523475 A JPS5523475 A JP S5523475A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- gate circuit
- trigger
- voltage
- pressure body
- 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
Abstract
PURPOSE: To detect definitely a small load on a pressure body by using a piezoelectric element, which generates a trigger signal on detecting a smaple touching the presure body, etc.
CONSTITUTION: On detecting pressure body 8b coming in contact with smaple 10, piezoelectric element 9 develops a voltage which rises suddenly. Trigger generator 21 compares the signal of the voltage with the set voltage of the comparator, so that when the above-mentioned signal is higher than the set voltage, a high-level trigger output signal will be sent out. This trigger generator 21 is connected to the input terminal of gate circuit 22, whose other input terminal connects to comparator 19; when high-level signals are simultaneously applied to two input terminals of this gate circuit 22, a low level output signal is outputted. On receiving the signal from above-mentioned gate circuit 22, operator 18 starts arithmetic. In this way, a small load on pressure body 8b can difinitely be detected.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9695278A JPS5523475A (en) | 1978-08-09 | 1978-08-09 | Measuring instrument for indentation hardness |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9695278A JPS5523475A (en) | 1978-08-09 | 1978-08-09 | Measuring instrument for indentation hardness |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5523475A true JPS5523475A (en) | 1980-02-19 |
Family
ID=14178616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9695278A Pending JPS5523475A (en) | 1978-08-09 | 1978-08-09 | Measuring instrument for indentation hardness |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5523475A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6224686A (en) * | 1985-05-30 | 1987-02-02 | 日立コンデンサ株式会社 | Manufacture of printed wiring board |
JPS62178350U (en) * | 1986-04-30 | 1987-11-12 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5060283A (en) * | 1973-09-26 | 1975-05-24 | ||
JPS5372677A (en) * | 1976-12-09 | 1978-06-28 | Agency Of Ind Science & Technol | Indentation hardness tester |
-
1978
- 1978-08-09 JP JP9695278A patent/JPS5523475A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5060283A (en) * | 1973-09-26 | 1975-05-24 | ||
JPS5372677A (en) * | 1976-12-09 | 1978-06-28 | Agency Of Ind Science & Technol | Indentation hardness tester |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6224686A (en) * | 1985-05-30 | 1987-02-02 | 日立コンデンサ株式会社 | Manufacture of printed wiring board |
JPS62178350U (en) * | 1986-04-30 | 1987-11-12 |
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