JPS55155228A - Discriminator for road surface condition - Google Patents
Discriminator for road surface conditionInfo
- Publication number
- JPS55155228A JPS55155228A JP6323479A JP6323479A JPS55155228A JP S55155228 A JPS55155228 A JP S55155228A JP 6323479 A JP6323479 A JP 6323479A JP 6323479 A JP6323479 A JP 6323479A JP S55155228 A JPS55155228 A JP S55155228A
- Authority
- JP
- Japan
- Prior art keywords
- road surface
- speed
- vehicle
- wheel speed
- slippage
- 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
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
PURPOSE: To accomplish accurate discrimination of the condition of the road surface not depending on driver's judgment by determining slippery status of the road surface from the vehicle speed and the wheel speed using the reflected microwave from the road surface.
CONSTITUTION: The microwave is emitted to the road surface 14 through the antenna 1. The reflected wave from the road surfce is received with the antenna and processed in the Doppler processing circuit 5 to detect the Doppler frequency corresponding to the speed of the vehicle. The frequency voltage (F-V) converter 6 produces a voltage corresponding to the actual speed of the vehicle. On the other hand, the voltage corresponding to the wheel speed is generated through the rotary body 7, the wheel speed sensor 8 and the F-V converter 9. The output of these converters 6 and 9 is compared by the comparator 10 and converted into the signal correspoding to the slippage of the road surface so that the slippage is determined based thereon. The alarm 13 is actuated by the discrimination signal through AND gate 12 which is made to open by the detection signal of the water drop, ice and the like from the water drop sensor 11. Accordingly, the road surface conditions can be determined accurately without requiring driver's judgement thereby permitting proper counter actions to be taken.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6323479A JPS55155228A (en) | 1979-05-24 | 1979-05-24 | Discriminator for road surface condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6323479A JPS55155228A (en) | 1979-05-24 | 1979-05-24 | Discriminator for road surface condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55155228A true JPS55155228A (en) | 1980-12-03 |
Family
ID=13223315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6323479A Pending JPS55155228A (en) | 1979-05-24 | 1979-05-24 | Discriminator for road surface condition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55155228A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4387587A (en) * | 1981-06-17 | 1983-06-14 | Faulconer Boyd M | Motor vehicle deceleration data acquisition and processing apparatus and methodology |
| JPS58130254U (en) * | 1982-02-26 | 1983-09-02 | 株式会社東海理化電機製作所 | Freeze detection device |
| JPS58134758U (en) * | 1982-03-05 | 1983-09-10 | 株式会社東海理化電機製作所 | Freeze detection device |
-
1979
- 1979-05-24 JP JP6323479A patent/JPS55155228A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4387587A (en) * | 1981-06-17 | 1983-06-14 | Faulconer Boyd M | Motor vehicle deceleration data acquisition and processing apparatus and methodology |
| JPS58130254U (en) * | 1982-02-26 | 1983-09-02 | 株式会社東海理化電機製作所 | Freeze detection device |
| JPS58134758U (en) * | 1982-03-05 | 1983-09-10 | 株式会社東海理化電機製作所 | Freeze detection device |
| JPH0239240Y2 (en) * | 1982-03-05 | 1990-10-22 |
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