JPH0437852U - - Google Patents
Info
- Publication number
- JPH0437852U JPH0437852U JP7981090U JP7981090U JPH0437852U JP H0437852 U JPH0437852 U JP H0437852U JP 7981090 U JP7981090 U JP 7981090U JP 7981090 U JP7981090 U JP 7981090U JP H0437852 U JPH0437852 U JP H0437852U
- Authority
- JP
- Japan
- Prior art keywords
- light
- light receiving
- protrusions
- angle sensor
- crank angle
- 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
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 3
Landscapes
- Optical Transform (AREA)
Description
第１図は本考案に係る光学式クランク角センサ
の一実施例を示す平面図、第２図は検出部の構成
を示す概略図、第３図はＰＳＤの構成を示す図、
第４図はＰＳＤにおけるスポツト位置とＩ１−Ｉ
２／Ｉ１＋Ｉ２との関係を示す特性図、第５図は
同上実施例における回路図、第６図は同上実施例
の作用を説明するタイムチヤート、第７図ａ，ｂ
は夫々他の実施例の正面図及び平面図、第８図は
同上実施例の回路図、第９図は同上実施例の作用
を説明するタイムチヤート、第１０図は従来の光
学式クランク角センサの一例を示す平面図、第１
１図は検出部の構成を示す概略図、第１２図は従
来の問題点を説明するフオトダイオードの出力特
性図である。
１０……回転板、１１，２６……検出部、１２
，１３，２４，２５……凸部、１４，２８……凹
部、１５，２７……発光ダイオード、１６……Ｐ
ＳＤ（ポジシヨンセンシテイブデバイス）、２９
ａ〜２９ｃ……フオトダイオード。
FIG. 1 is a plan view showing an embodiment of the optical crank angle sensor according to the present invention, FIG. 2 is a schematic diagram showing the configuration of the detection section, and FIG. 3 is a diagram showing the configuration of the PSD.
Figure 4 shows the spot position in PSD and I 1 -I
2 /I 1 + I 2 Figure 5 is a circuit diagram in the above embodiment, Figure 6 is a time chart explaining the operation of the above embodiment, Figures 7 a and b
8 is a circuit diagram of the same embodiment, FIG. 9 is a time chart explaining the operation of the above embodiment, and FIG. 10 is a conventional optical crank angle sensor. A plan view showing an example of the first
FIG. 1 is a schematic diagram showing the configuration of the detection section, and FIG. 12 is an output characteristic diagram of a photodiode illustrating conventional problems. 10... Rotating plate, 11, 26... Detection section, 12
, 13, 24, 25... Convex portion, 14, 28... Concave portion, 15, 27... Light emitting diode, 16...P
SD (position sensitive device), 29
a~29c...Photodiode.
Claims (1)
板の外周部に所定角度毎に凸部と該凸部間に位置
する凹部を設け、前記回転板の外周部の凸部の先
端面及び凹部の底面に対面する一部位から該凸部
の先端面及び凹部の底面に向けて光を照射する発
光手段と、前記凸部の先端面及び凹部の底面から
の反射光を入射する受光手段であつて、前記発光
手段と回転板の外周部の光照射・反射ポイントと
の距離によつて異なる反射光の入射ポイントによ
つて異なる信号を出力する受光手段と、を設け、
前記回転板の回転に伴う受光手段の出力信号変化
に基づいてクランク軸の回転角を検出するように
構成されたことを特徴とする光学式クランク角セ
ンサ。 Protrusions and recesses located between the protrusions are provided at predetermined angles on the outer periphery of a rotary plate that rotates in conjunction with the crankshaft of the internal combustion engine. A light emitting means for emitting light from a portion facing the bottom surface toward the tip surface of the convex portion and the bottom surface of the concave portion; and a light receiving device for receiving reflected light from the tip surface of the convex portion and the bottom surface of the concave portion. , light receiving means outputting different signals depending on the incident point of the reflected light, which varies depending on the distance between the light emitting means and the light irradiation/reflection point on the outer periphery of the rotary plate,
An optical crank angle sensor characterized in that the optical crank angle sensor is configured to detect the rotation angle of the crankshaft based on a change in the output signal of the light receiving means as the rotating plate rotates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7981090U JPH0437852U (en) | 1990-07-30 | 1990-07-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7981090U JPH0437852U (en) | 1990-07-30 | 1990-07-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0437852U true JPH0437852U (en) | 1992-03-31 |
Family
ID=31624308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7981090U Pending JPH0437852U (en) | 1990-07-30 | 1990-07-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0437852U (en) |
-
1990
- 1990-07-30 JP JP7981090U patent/JPH0437852U/ja active Pending
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