JPH0235083U - - Google Patents
Info
- Publication number
- JPH0235083U JPH0235083U JP11431088U JP11431088U JPH0235083U JP H0235083 U JPH0235083 U JP H0235083U JP 11431088 U JP11431088 U JP 11431088U JP 11431088 U JP11431088 U JP 11431088U JP H0235083 U JPH0235083 U JP H0235083U
- Authority
- JP
- Japan
- Prior art keywords
- road surface
- received
- level
- detection device
- transmitter
- 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
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
Description
第１図は本考案の路面センサによる超音波発信
方向を示す車両の側面図、第２図は本考案の一実
施例の構成を示すブロツク図、第３図は同上の回
路図、第４図は検知信号とその処理を説明するた
めの線図、第５図は作用を説明するためのフロー
チヤートである。
３……第１発信装置、４……第１受信検波装置
、５……第２発信装置、６……第１受信検波装置
、７……減算回路、８……記憶回路、９……しき
い値処理回路、１０……制御回路。
Fig. 1 is a side view of a vehicle showing the direction of ultrasonic wave transmission by the road sensor of the present invention, Fig. 2 is a block diagram showing the configuration of an embodiment of the invention, Fig. 3 is a circuit diagram of the same, and Fig. 4 is a diagram for explaining the detection signal and its processing, and FIG. 5 is a flowchart for explaining the operation. 3...First transmitting device, 4...First receiving and detecting device, 5...Second transmitting device, 6...First receiving and detecting device, 7...Subtraction circuit, 8...Storage circuit, 9... Threshold processing circuit, 10...control circuit.
Claims (1)
信する第１発信装置と、 上記Ａ路面から反射した反射波を受信する第１
受信検波装置と、 車両進行方向前方であつて上記Ａ路面より車両
に近いＢ路面に向けて超音波を発信する第２発信
装置と、 上記Ｂ路面から反射した反射波を受信する第２
受信検波装置と、 上記第１受信検波装置が受信した受信波のレベ
ルと上記第２受信検波装置が受信した受信波のレ
ベルとを比較して両レベルの差を算出する減算回
路と、 車両の走行環境に応じて、実質的に上記第２受
信検波装置が受信した受信波のレベルに基づいて
予め設定された複数の基準路面しきい値を記憶さ
せた記憶装置と、 上記第２受信検波装置が受信した受信波のレベ
ルに基づいて上記記憶装置から呼び出された一つ
の基準路面しきい値と上記両レベルの差とを比較
するしきい値処理回路と、 上記基準路面しきい値と上記両レベルの差との
差に応じて制御信号を出力する制御回路 とを備えていることを特徴とする路面センサ。[Claims for Utility Model Registration] A first transmitter that transmits ultrasonic waves toward road surface A ahead in the direction of vehicle travel; and a first transmitter that receives reflected waves reflected from road surface A.
a second transmitting device that transmits ultrasonic waves toward a road surface B that is forward in the direction of travel of the vehicle and closer to the vehicle than the road surface A; and a second transmitter that receives reflected waves reflected from the road surface B.
a subtraction circuit that compares the level of the received wave received by the first receiving detection device and the level of the received wave received by the second receiving detection device and calculates a difference between the two levels; a storage device storing a plurality of reference road surface threshold values that are preset substantially based on the level of the received waves received by the second reception and detection device according to the driving environment; and the second reception and detection device. a threshold processing circuit that compares one reference road surface threshold value retrieved from the storage device based on the level of the received wave received by the above-mentioned two levels, and a threshold processing circuit that compares the difference between the two levels; A road surface sensor comprising: a control circuit that outputs a control signal according to a difference in level;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11431088U JPH0623983Y2 (en) | 1988-08-31 | 1988-08-31 | Road sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11431088U JPH0623983Y2 (en) | 1988-08-31 | 1988-08-31 | Road sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0235083U true JPH0235083U (en) | 1990-03-06 |
| JPH0623983Y2 JPH0623983Y2 (en) | 1994-06-22 |
Family
ID=31354938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11431088U Expired - Lifetime JPH0623983Y2 (en) | 1988-08-31 | 1988-08-31 | Road sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0623983Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03269388A (en) * | 1990-03-20 | 1991-11-29 | Japan Radio Co Ltd | Multi-purpose ultrasonic measuring instrument for mounting on vehicle |
-
1988
- 1988-08-31 JP JP11431088U patent/JPH0623983Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03269388A (en) * | 1990-03-20 | 1991-11-29 | Japan Radio Co Ltd | Multi-purpose ultrasonic measuring instrument for mounting on vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0623983Y2 (en) | 1994-06-22 |
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