JPS623069U - - Google Patents
Info
- Publication number
- JPS623069U JPS623069U JP9367485U JP9367485U JPS623069U JP S623069 U JPS623069 U JP S623069U JP 9367485 U JP9367485 U JP 9367485U JP 9367485 U JP9367485 U JP 9367485U JP S623069 U JPS623069 U JP S623069U
- Authority
- JP
- Japan
- Prior art keywords
- vehicle speed
- detection device
- reed switch
- less
- magnet
- 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
- 235000014676 Phragmites communis Nutrition 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Description
第１図は本考案の一実施例に係わる車速検出装
置を示す回路図、第２図は動作を説明するための
フローチヤートである。
１０……車速センサ、１１……磁石、１２……
リードスイツチ、１４……コンパレータ、１５…
…ＳＲ型フリツプフロツプ、１６……マイクロコ
ンピユータ。
FIG. 1 is a circuit diagram showing a vehicle speed detection device according to an embodiment of the present invention, and FIG. 2 is a flowchart for explaining the operation. 10... Vehicle speed sensor, 11... Magnet, 12...
Reed switch, 14... Comparator, 15...
...SR type flip-flop, 16...microcomputer.
Claims (1)
に応じて開成、閉成が繰返されるリードスイツチ
と、このリードスイツチから得られるパルスの周
期を計測して車速を算出して記憶するようにして
いる車速検出装置において、車速が第１の車速Ｖ
１Km／ｈ以下になつてから設定時間以内に第２の
車速２Km／ｈ（２＞１）以上になつた場合
には今回検出した車速を無視し、そののち車速が
第１の車速Ｖ１以下になると今回の車速を記憶す
るようにしたことを特徴とする車速検出装置。 A magnet rotates according to the vehicle speed, a reed switch is repeatedly opened and closed according to the rotation of the magnet, and the period of the pulse obtained from this reed switch is measured to calculate and store the vehicle speed. In the vehicle speed detection device, the vehicle speed is the first vehicle speed V.
If the second vehicle speed becomes 2 Km/h (2>1) or more within the set time after becoming 1 Km/h or less, the vehicle speed detected this time is ignored and the vehicle speed then decreases to the first vehicle speed V1 or less. This vehicle speed detection device is characterized in that it stores the current vehicle speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9367485U JPS623069U (en) | 1985-06-20 | 1985-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9367485U JPS623069U (en) | 1985-06-20 | 1985-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS623069U true JPS623069U (en) | 1987-01-09 |
Family
ID=30651564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9367485U Pending JPS623069U (en) | 1985-06-20 | 1985-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS623069U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54132915A (en) * | 1978-04-07 | 1979-10-16 | Hitachi Ltd | Speed rationality checking circuit |
-
1985
- 1985-06-20 JP JP9367485U patent/JPS623069U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54132915A (en) * | 1978-04-07 | 1979-10-16 | Hitachi Ltd | Speed rationality checking circuit |
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