JPS5523475A - Measuring instrument for indentation hardness - Google Patents

Measuring instrument for indentation hardness

Info

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
Application number
JP9695278A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Miyashita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Akashi Seisakusho KK
Original Assignee
Akashi Seisakusho KK
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 by Akashi Seisakusho KK filed Critical Akashi Seisakusho KK
Priority to JP9695278A priority Critical patent/JPS5523475A/en
Publication of JPS5523475A publication Critical patent/JPS5523475A/en
Pending legal-status Critical Current

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
JP9695278A 1978-08-09 1978-08-09 Measuring instrument for indentation hardness Pending JPS5523475A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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