JPS55149811A - Electronic balance - Google Patents
Electronic balanceInfo
- Publication number
- JPS55149811A JPS55149811A JP5854879A JP5854879A JPS55149811A JP S55149811 A JPS55149811 A JP S55149811A JP 5854879 A JP5854879 A JP 5854879A JP 5854879 A JP5854879 A JP 5854879A JP S55149811 A JPS55149811 A JP S55149811A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- weight
- frequency
- output
- inputted
- 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 improve the resolution while dispensing with the A-D converter by digital indication of the frequency which changes according to the displacement of the weighing base with a direct counting thereof through the conversion into weight.
CONSTITUTION: When the article 25 is placed on the weighing base 15, the mobile member 17 of the Roberval mechanism is displaced until the weight of the article balances with the force of the weighing spring 16, and the capacitance of the variable condenser 14 varies causing a change in the frequency of the oscillation circuit 13. The output and the output of a fixed frequency from the oscillation circuit 11 are inputted into the mixing circuit 18. The output of the beat frequency from the mixing circuit 18 is inputted into the count circuit 22 through the low pass filter 21. The discrete value of the count circuit 22 is converted into the weight by the conversion circuit. In addition, the digital indicator is driven by the indication drive circuit 24 to indicate the weight.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5854879A JPS55149811A (en) | 1979-05-11 | 1979-05-11 | Electronic balance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5854879A JPS55149811A (en) | 1979-05-11 | 1979-05-11 | Electronic balance |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55149811A true JPS55149811A (en) | 1980-11-21 |
Family
ID=13087504
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5854879A Pending JPS55149811A (en) | 1979-05-11 | 1979-05-11 | Electronic balance |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55149811A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS606829A (en) * | 1983-05-09 | 1985-01-14 | セトラ・システムズ・インコ−ポレイテツド | Weighing system |
JPS6433623U (en) * | 1987-08-20 | 1989-03-02 | ||
JPH0557527B2 (en) * | 1981-05-19 | 1993-08-24 | Setra Systems Inc | |
US5790107A (en) * | 1995-06-07 | 1998-08-04 | Logitech, Inc. | Touch sensing method and apparatus |
-
1979
- 1979-05-11 JP JP5854879A patent/JPS55149811A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0557527B2 (en) * | 1981-05-19 | 1993-08-24 | Setra Systems Inc | |
JPS606829A (en) * | 1983-05-09 | 1985-01-14 | セトラ・システムズ・インコ−ポレイテツド | Weighing system |
JPH07117445B2 (en) * | 1983-05-09 | 1995-12-18 | セトラ・システムズ・インコーポレイテッド | Weighing system |
JPS6433623U (en) * | 1987-08-20 | 1989-03-02 | ||
US5790107A (en) * | 1995-06-07 | 1998-08-04 | Logitech, Inc. | Touch sensing method and apparatus |
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