JPS5694271A - Digital display type vehicle speedometer - Google Patents
Digital display type vehicle speedometerInfo
- Publication number
- JPS5694271A JPS5694271A JP17060979A JP17060979A JPS5694271A JP S5694271 A JPS5694271 A JP S5694271A JP 17060979 A JP17060979 A JP 17060979A JP 17060979 A JP17060979 A JP 17060979A JP S5694271 A JPS5694271 A JP S5694271A
- Authority
- JP
- Japan
- Prior art keywords
- vehicle speed
- display
- display register
- content
- output
- 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
Landscapes
- Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
Abstract
PURPOSE: To eliminate extraneous feel of display by rewriting the content of a display register only when the difference between the output of a vehicle speed counter and the content of the display register exceeds a permissible range, and making the display 0 when the intervals of vehicle speed pulses are above predetermined time.
CONSTITUTION: The output 102 of a vehicle speed counter 12 and the content 103 of a display register 14 are compared in a hysteresis processing circuit 18, and only when the difference of both is not within a permissible range, a difference existence signal 104 is outputted, and a latch signal 106 is applied via an AND gate 24 to a display register 14, so that the content of the display register 14 is rewritten according to the output 102 of the vehicle speed counter 12. On the other hand, vehicle speed pulses 100 and an initial set signal 108 are being inputted as reset signals to a time counter 52, and the time counter 52 is counting clock pulses 109 only during the generation intervals of the vehicle speed pulses 100. When the count value 110 exceeds a predetermined value, the zero display output 105 of a bistable multivibrator 54 goes to 1, and the display register 14 and vehicle speed counter 12 are made forcefully 0.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17060979A JPS5694271A (en) | 1979-12-28 | 1979-12-28 | Digital display type vehicle speedometer |
CA000367068A CA1159534A (en) | 1979-12-28 | 1980-12-18 | Digital indication type speedometer |
EP80304658A EP0031703B2 (en) | 1979-12-28 | 1980-12-19 | Digital indication type speedometer |
DE8080304658T DE3067594D1 (en) | 1979-12-28 | 1980-12-19 | Digital indication type speedometer |
US06/218,500 US4368426A (en) | 1979-12-28 | 1980-12-22 | Digital indication type speedometer |
AU65851/80A AU538460B2 (en) | 1979-12-28 | 1980-12-24 | Digital speedometer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17060979A JPS5694271A (en) | 1979-12-28 | 1979-12-28 | Digital display type vehicle speedometer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5694271A true JPS5694271A (en) | 1981-07-30 |
Family
ID=15908016
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17060979A Pending JPS5694271A (en) | 1979-12-28 | 1979-12-28 | Digital display type vehicle speedometer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5694271A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63234112A (en) * | 1987-03-23 | 1988-09-29 | Japan Steel & Tube Constr Co Ltd | Flow rate measuring method for drainage channel |
-
1979
- 1979-12-28 JP JP17060979A patent/JPS5694271A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63234112A (en) * | 1987-03-23 | 1988-09-29 | Japan Steel & Tube Constr Co Ltd | Flow rate measuring method for drainage channel |
JP2509211B2 (en) * | 1987-03-23 | 1996-06-19 | 日本鋼管工事株式会社 | Drainage flow measurement method |
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