JPS6480810A - Road surface unevenness detector - Google Patents
Road surface unevenness detectorInfo
- Publication number
- JPS6480810A JPS6480810A JP23967287A JP23967287A JPS6480810A JP S6480810 A JPS6480810 A JP S6480810A JP 23967287 A JP23967287 A JP 23967287A JP 23967287 A JP23967287 A JP 23967287A JP S6480810 A JPS6480810 A JP S6480810A
- Authority
- JP
- Japan
- Prior art keywords
- road surface
- value
- level
- sensor
- improve
- 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.)
- Granted
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
PURPOSE:To improve the detection accuracy of a road surface step by varying a high and a low threshold value according to the means value of sensor signals corresponding to road surface reflection factors. CONSTITUTION:The road surface in front of a vehicle in its traveling direction is irradiated and its reflected light is photodetected by a sensor part 1. A signal of level corresponding to the road surface reflection factor is outputted by the sensor part 1 to an electronic controller ECU 2. The ECU 2 averages the sensor signal S to calculate the level of the mean value C and compares the value S/C with the threshold values to detect the step. In this case, the threshold values are varied according to the level of the mean value C to improve the detection accuracy of the road surface step.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62239672A JP2527336B2 (en) | 1987-09-24 | 1987-09-24 | Road surface unevenness detection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62239672A JP2527336B2 (en) | 1987-09-24 | 1987-09-24 | Road surface unevenness detection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6480810A true JPS6480810A (en) | 1989-03-27 |
JP2527336B2 JP2527336B2 (en) | 1996-08-21 |
Family
ID=17048193
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62239672A Expired - Lifetime JP2527336B2 (en) | 1987-09-24 | 1987-09-24 | Road surface unevenness detection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2527336B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107796325A (en) * | 2017-10-12 | 2018-03-13 | 南京中高知识产权股份有限公司 | A kind of measuring method and measuring system of pavement texture construction depth |
-
1987
- 1987-09-24 JP JP62239672A patent/JP2527336B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107796325A (en) * | 2017-10-12 | 2018-03-13 | 南京中高知识产权股份有限公司 | A kind of measuring method and measuring system of pavement texture construction depth |
CN107796325B (en) * | 2017-10-12 | 2019-11-26 | 南京中高知识产权股份有限公司 | A kind of measurement method and measuring system of pavement texture construction depth |
Also Published As
Publication number | Publication date |
---|---|
JP2527336B2 (en) | 1996-08-21 |
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