JPS5684556A - Electronic speed meter with circuit for compensating speed of vehicle - Google Patents
Electronic speed meter with circuit for compensating speed of vehicleInfo
- Publication number
- JPS5684556A JPS5684556A JP16034879A JP16034879A JPS5684556A JP S5684556 A JPS5684556 A JP S5684556A JP 16034879 A JP16034879 A JP 16034879A JP 16034879 A JP16034879 A JP 16034879A JP S5684556 A JPS5684556 A JP S5684556A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- vehicle
- counted
- pulse signal
- sampling time
- 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
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
PURPOSE: To enable constant indication of the real speed of a vehicle by compensating the increase of the speed of the vehicle due to the change of a dynamic radius of a tyre at the time of high-speed running with the control of the sampling time of a vehicle speed pulse signal.
CONSTITUTION: A pulse signal Sp having a frequency corresponding to the speed of the vehicle is counted 1 within a prescribed sampling time T decided by a timing signal Tp outputted from a timing signal generating circuit 5 and is indicated digitally 4 as an information for the speed of the vehicle. The vehicle-speed pulse signal Sp is counted also in quadranary counter 6 for the sampling time T, and when the counted value thereof does not reach 40, the frequency division ratio of a variable frequency dividing circuit 7 is set at N, while it is set at N' (N'>N) when the value exceeds 40. When the speed of the vehicle is 40km/h or more, the cycle of the timing signal Tp is made longer and thus the compensation of errors in measurement due to the change of the dynamic radius of the tyre at the time of high-speed running is performed.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16034879A JPS5684556A (en) | 1979-12-12 | 1979-12-12 | Electronic speed meter with circuit for compensating speed of vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16034879A JPS5684556A (en) | 1979-12-12 | 1979-12-12 | Electronic speed meter with circuit for compensating speed of vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5684556A true JPS5684556A (en) | 1981-07-09 |
Family
ID=15713033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16034879A Pending JPS5684556A (en) | 1979-12-12 | 1979-12-12 | Electronic speed meter with circuit for compensating speed of vehicle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5684556A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59125068A (en) * | 1982-12-30 | 1984-07-19 | Nippon Seiki Co Ltd | Frequency meter |
JPS59125069A (en) * | 1982-12-30 | 1984-07-19 | Nippon Seiki Co Ltd | Frequency meter |
JPS62189658U (en) * | 1986-05-23 | 1987-12-02 |
-
1979
- 1979-12-12 JP JP16034879A patent/JPS5684556A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59125068A (en) * | 1982-12-30 | 1984-07-19 | Nippon Seiki Co Ltd | Frequency meter |
JPS59125069A (en) * | 1982-12-30 | 1984-07-19 | Nippon Seiki Co Ltd | Frequency meter |
JPS6367143B2 (en) * | 1982-12-30 | 1988-12-23 | Japan Engine Valve Mfg | |
JPS6367142B2 (en) * | 1982-12-30 | 1988-12-23 | Japan Engine Valve Mfg | |
JPS62189658U (en) * | 1986-05-23 | 1987-12-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5761849A (en) | Speed change gear position detector | |
JPS5684556A (en) | Electronic speed meter with circuit for compensating speed of vehicle | |
JPS53143378A (en) | Speed counting system | |
JPS5425779A (en) | Torque measuring method of electric dynamometers | |
JPS5315175A (en) | Jitter measuring instrument | |
JPS5682413A (en) | Counter circuit of digital measuring instrument | |
JPS531570A (en) | Measuring system | |
JPS5213371A (en) | A device for measuring the speed of a turning gear | |
JPS52457A (en) | Fuel consumption measuring instrument | |
JPS5684555A (en) | Indicating device for vehicle | |
JPS5539055A (en) | Wheel diameter compensator for vehicle | |
JPS5596461A (en) | Speedometer for automobile | |
JPS52135774A (en) | Digital chronograph | |
JPS5576978A (en) | Temperature compensating circuit for electronic watch | |
JPS5312672A (en) | Digital detector for rotational frequency | |
JPS52115268A (en) | Mean speed measuring method | |
JPS5585257A (en) | Phase difference measuring circuit | |
JPS5338001A (en) | System for measuring operation performance | |
JPS53141555A (en) | Automatic frequency regulator of oscillator circcuit for crystal vibrator | |
JPS5326166A (en) | Measuring apparatus for clock time accuracy | |
JPS5724857A (en) | Digital indication type vehicle speedometer | |
JPS53127258A (en) | Accuracy measuring system of da-ad circuit | |
JPS53133719A (en) | Rotary speed adjuster for motor | |
JPS5394757A (en) | Quadrature detection circuit | |
JPS55119072A (en) | Test apparatus for ic |