FR2278076A1 - Speedometer using speed proportional pulse frequency - has gate in pulse counting system and kilometre counter - Google Patents
Speedometer using speed proportional pulse frequency - has gate in pulse counting system and kilometre counterInfo
- Publication number
- FR2278076A1 FR2278076A1 FR7521915A FR7521915A FR2278076A1 FR 2278076 A1 FR2278076 A1 FR 2278076A1 FR 7521915 A FR7521915 A FR 7521915A FR 7521915 A FR7521915 A FR 7521915A FR 2278076 A1 FR2278076 A1 FR 2278076A1
- Authority
- FR
- France
- Prior art keywords
- gate
- pulses
- frequency
- counter
- kilometre
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/489—Digital circuits therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C22/00—Measuring distance traversed on the ground by vehicles, persons, animals or other moving solid bodies, e.g. using odometers, using pedometers
- G01C22/02—Measuring distance traversed on the ground by vehicles, persons, animals or other moving solid bodies, e.g. using odometers, using pedometers by conversion into electric waveforms and subsequent integration, e.g. using tachometer generator
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
An electrical transducer (10) produces electrical pulses at a repetition frequency proportional to the speed of a vehicle on which the indicator is mounted and a frequency measurement device determines the rate of emission of these pulses. The frequency measurement device comprises a gate (14) which receives the pulses from the transducer, or pulses produced at a frequency which is proportional to the transducer pulse emission frequency, and a gate control circuit (16) which keeps the gate (14) open during successive and consecutive time intervals and closes it at the end of each interval. A counter (26) receives the pulses from the gate and counts the number passing during each time interval.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPB816974 | 1974-07-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2278076A1 true FR2278076A1 (en) | 1976-02-06 |
Family
ID=3765950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7521915A Withdrawn FR2278076A1 (en) | 1974-07-11 | 1975-07-11 | Speedometer using speed proportional pulse frequency - has gate in pulse counting system and kilometre counter |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS5131274A (en) |
AU (1) | AU8270075A (en) |
FR (1) | FR2278076A1 (en) |
ZA (1) | ZA754271B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2476877A3 (en) * | 1979-12-11 | 1981-08-28 | Cutler Hammer World Trade Inc | Correction circuit for motor vehicle instrumentation - comprises multiplier circuit which applies field percentage correction to sensor signal |
-
1974
- 1974-07-11 AU AU82700/75A patent/AU8270075A/en not_active Expired
-
1975
- 1975-07-03 ZA ZA00754271A patent/ZA754271B/en unknown
- 1975-07-11 JP JP50084557A patent/JPS5131274A/ja active Pending
- 1975-07-11 FR FR7521915A patent/FR2278076A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2476877A3 (en) * | 1979-12-11 | 1981-08-28 | Cutler Hammer World Trade Inc | Correction circuit for motor vehicle instrumentation - comprises multiplier circuit which applies field percentage correction to sensor signal |
Also Published As
Publication number | Publication date |
---|---|
ZA754271B (en) | 1976-06-30 |
AU8270075A (en) | 1977-01-06 |
JPS5131274A (en) | 1976-03-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |