JPH0450791A - Photosensor circuit - Google Patents
Photosensor circuitInfo
- Publication number
- JPH0450791A JPH0450791A JP2160159A JP16015990A JPH0450791A JP H0450791 A JPH0450791 A JP H0450791A JP 2160159 A JP2160159 A JP 2160159A JP 16015990 A JP16015990 A JP 16015990A JP H0450791 A JPH0450791 A JP H0450791A
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- voltage
- emitting element
- light
- voltage comparator
- 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 abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、発光素子と受光素子とを組合せた光センサに
よって媒体の検出を行う光センサ回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical sensor circuit that detects a medium using an optical sensor that combines a light emitting element and a light receiving element.
発光素子と受光素子とを組合せた光センサによって媒体
の検出を行う従来の光センサ回路では、1紐の光センサ
毎に、1個の光電流検出抵抗と、1個の電圧増幅器およ
び1個の電圧比較器とを有する1組のセンサ信号処理回
路とを用いる方式が採用されている。In a conventional optical sensor circuit that detects a medium using an optical sensor that combines a light-emitting element and a light-receiving element, each string of optical sensors includes one photocurrent detection resistor, one voltage amplifier, and one A method using a set of sensor signal processing circuits having a voltage comparator is adopted.
上述したような従来の光センサ回路は、光センサの組数
が多くなると、その分だけセンサ信号処理回路の数が多
くなるという欠点がある。The conventional optical sensor circuit as described above has a drawback in that as the number of optical sensors increases, the number of sensor signal processing circuits increases accordingly.
〔課題を解決するための手段〕
本発明の光センサ回路は、n個の発光素子およびそれぞ
れに対応するn個の受光素子を組合せたn個の光センサ
と、n個のダイオードと、1個の光電流検出抵抗と、1
個の電圧増幅器および1個の電圧比較器を有する1組の
センサ信号処理回路と、n個のD型フリップフロップと
、1個の制御回路と、1個の発光素子点灯回路とを有し
ている。[Means for Solving the Problems] The optical sensor circuit of the present invention includes n optical sensors that are a combination of n light emitting elements and n light receiving elements corresponding thereto, n diodes, and one optical sensor. a photocurrent detection resistor of 1
It has one set of sensor signal processing circuits having n voltage amplifiers and one voltage comparator, n D-type flip-flops, one control circuit, and one light emitting element lighting circuit. There is.
すなわち、本発明の光センサ回路は、発光素子と受光素
子とを組合せた光センサによって媒体の検出を行う光セ
ンサ回路において、n個(nは任意の自然数)の発光素
子およびそれに対応するn個の受光素子を組合せたn個
の光センサと、前記n個の受光素子と結合するn個のダ
イオードと、前記n個のダイオードの出力電流を流す1
個の光電流検出抵抗と、前記光電流検出抵抗の電圧を増
幅する1個の電圧増幅器と、前記電圧増幅器の出力信号
を入力して媒体の有無を検出する1個の電圧比較器と、
前記電圧比較器の出力信号を入力して保持するn個のD
型フリップフロップと、前記発光素子のうちの任意の1
個の発光素子を点灯させる発光素子点灯回路と、前記電
圧比較器の出力信号を保持するn個のD型フリップフロ
ップとを備え、制御回路によって前記発光素子点灯回路
を動作させて前記n個の発光素子のうちの任意の1個の
発光素子を点灯させると同時にそれに対応する1個のD
型フリップフロップを動作させて前記電圧比較器からの
出力信号を保持させるようにしたものであり、特に、n
個の発光素子を有する発光素子群と、前記n個の発光素
子のそれぞれに対応するn個の受光素子を有する受光素
子群と、前記n個の受光素子のそれぞれの出力信号を入
力するn個のダイオードを有するダイオード群と、前記
n個のダイオードの出力電流を流す1個の光電流検出抵
抗と、前記光電流検出抵抗の電圧を増幅する1個の電圧
増幅器と、前記電圧増幅器の出力信号を入力して媒体の
有無を検出する電圧比較器と、前記電圧比較器の出力信
号を入力して保持するn個のD型フリップフロップと、
前記n個の発光素子のそれぞれに対応するn個の駆動部
を有する発光素子点灯回路と、前記発光素子点灯回路中
の任意の1個の駆動部を動作させると共に前記n個のD
型フリップフロップの中の前記1個の駆動部に対応する
1個のD型フリップフロップの保持動作を駆動する1個
の制御回路とを備えたものである。That is, the optical sensor circuit of the present invention is an optical sensor circuit that detects a medium using an optical sensor that is a combination of a light emitting element and a light receiving element. n photosensors in which n light receiving elements are combined, n diodes coupled to the n light receiving elements, and 1 through which the output current of the n diodes flows.
one photocurrent detection resistor, one voltage amplifier that amplifies the voltage of the photocurrent detection resistor, and one voltage comparator that inputs the output signal of the voltage amplifier to detect the presence or absence of a medium;
n Ds that input and hold the output signal of the voltage comparator.
type flip-flop, and any one of the light emitting elements.
A light emitting element lighting circuit that lights up the n light emitting elements, and n D-type flip-flops that hold the output signal of the voltage comparator, and a control circuit operates the light emitting element lighting circuit to At the same time as lighting up any one light emitting element among the light emitting elements, one D corresponding to it lights up.
The type flip-flop is operated to hold the output signal from the voltage comparator.
a light-emitting element group having n light-emitting elements; a light-receiving element group having n light-receiving elements corresponding to each of the n light-emitting elements; a diode group having a diode, one photocurrent detection resistor through which the output current of the n diodes flows, one voltage amplifier that amplifies the voltage of the photocurrent detection resistor, and an output signal of the voltage amplifier. a voltage comparator that inputs and detects the presence or absence of a medium; n D-type flip-flops that input and hold output signals of the voltage comparators;
A light emitting element lighting circuit having n driving units corresponding to each of the n light emitting elements, and operating any one driving unit in the light emitting element lighting circuit, and operating the n D
and one control circuit that drives the holding operation of one D-type flip-flop corresponding to the one driving section in the D-type flip-flop.
次に本発明の実施例について図面を参照して説明する 第1図は本発明の一実施例を示す回路図である。 Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a circuit diagram showing an embodiment of the present invention.
第1図において、制御回路1は、発光素子点灯回路9は
、n個(nは任意の自然数で発光素子群2の発光素子の
数および受光素子群8の受光素子の数と同数)のトラン
ジスタのうちの1個のトランジスタTR工をオンとし、
発光素子群2の中の1個の発光素子(発光ダイオード)
P D tのみを点灯する。これによって受光素子群
3の中の1個の受光素子(フォトトランジスタ)PT、
に電流が発生する。この電流は、ダイオード群4の中の
1個のダイオードDiを通って光電流検出抵抗5に流れ
込んで電圧V1を発生する。この電圧V1は、電圧増幅
器6によって増幅され、さろに電圧比較器7によって媒
体の有無を検出する検出信号に変換される。この検出信
号はD型フリップフロップ群8の中の1個のD型フリッ
プフロップFF□に入力し、ここで制御回路1から出力
されるホールド信号によってラッチされる。In FIG. 1, the control circuit 1 includes a light-emitting element lighting circuit 9 having n transistors (n is any natural number and is the same number as the number of light-emitting elements in the light-emitting element group 2 and the number of light-receiving elements in the light-receiving element group 8). Turn on one of the transistors TR,
One light emitting element (light emitting diode) in light emitting element group 2
Only P D t lights up. As a result, one light receiving element (phototransistor) PT in the light receiving element group 3,
A current is generated. This current flows into the photocurrent detection resistor 5 through one diode Di in the diode group 4 and generates a voltage V1. This voltage V1 is amplified by a voltage amplifier 6 and further converted by a voltage comparator 7 into a detection signal for detecting the presence or absence of a medium. This detection signal is input to one D-type flip-flop FF□ in the D-type flip-flop group 8, and is latched there by a hold signal output from the control circuit 1.
このような動作を、発光素子群2の発光素子P D 2
からPD、まで順次に行うことにより、すべての光セン
サによる媒体の有無に関する情報がD型フリップフロッ
プ群8にラッチされる。This operation is performed by the light emitting elements P D 2 of the light emitting element group 2.
By sequentially performing from PD to PD, information regarding the presence or absence of a medium from all optical sensors is latched into the D-type flip-flop group 8.
以上説明したように、本発明の光センサ回路は、n組の
光センサとn個のダイオードとを結合し、n個の光セン
サの中の1組の光センサを動作させてその信号を1組の
センサ信号処理回路によって処理できるようにすること
により、センサ信号処理回路の数を削減することができ
るという効果がある。As explained above, the optical sensor circuit of the present invention combines n sets of optical sensors and n diodes, operates one set of optical sensors among the n optical sensors, and converts the signal into one signal. By enabling processing by a set of sensor signal processing circuits, there is an effect that the number of sensor signal processing circuits can be reduced.
第1図は本発明の一実施例を示す回路図である。
1・・・制御回路、2・・・発光素子群、3・・・受光
素子群、4・・・ダイオード群、5・・・光電流検出抵
抗、6・・・電圧増幅器、7・・・電圧比較器、8・・
・D型フリップフロップ群、9・・・発光素子点灯回路
。FIG. 1 is a circuit diagram showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Control circuit, 2... Light emitting element group, 3... Light receiving element group, 4... Diode group, 5... Photocurrent detection resistor, 6... Voltage amplifier, 7... Voltage comparator, 8...
- D-type flip-flop group, 9... light emitting element lighting circuit.
Claims (1)
媒体の検出を行う光センサ回路において、n個(nは任
意の自然数)の発光素子およびそれに対応するn個の受
光素子を組合せたn個の光センサと、前記n個の受光素
子と結合するn個のダイオードと、前記n個のダイオー
ドの出力電流を流す1個の光電流検出抵抗と、前記光電
流検出抵抗の電圧を増幅する1個の電圧増幅器と、前記
電圧増幅器の出力信号を入力して媒体の有無を検出する
1個の電圧比較器と、前記電圧比較器の出力信号を入力
して保持するn個のD型フリップフロップと、前記発光
素子のうちの任意の1個の発光素子を点灯させる発光素
子点灯回路と、前記電圧比較器の出力信号を保持するn
個のD型フリップフロップとを備え、制御回路によって
前記発光素子点灯回路を動作させて前記n個の発光素子
のうちの任意の1個の発光素子を点灯させると同時にそ
れに対応する1個のD型フリップフロップを動作させて
前記電圧比較器からの出力信号を保持させるようにした
ことを特徴とする光センサ回路。 2、n個の発光素子を有する発光素子群と、前記n個の
発光素子のそれぞれに対応するn個の受光素子を有する
受光素子群と、前記n個の受光素子のそれぞれの出力信
号を入力するn個のダイオードを有するダイオード群と
、前記n個のダイオードの出力電流を流す1個の光電流
検出抵抗と、前記光電流検出抵抗の電圧を増幅する1個
の電圧増幅器と、前記電圧増幅器の出力信号を入力して
媒体の有無を検出する電圧比較器と、前記電圧比較器の
出力信号を入力して保持するn個のD型フリップフロッ
プと、前記n個の発光素子のそれぞれに対応するn個の
駆動部を有する発光素子点灯回路と、前記発光素子点灯
回路中の任意の1個の駆動部を動作させると共に前記n
個のD型フリップフロップの中の前記1個の駆動部に対
応する1個のD型フリップフロップの保持動作を駆動す
る1個の制御回路とを備えることを特徴とする光センサ
回路。[Scope of Claims] 1. In an optical sensor circuit that detects a medium using a photosensor that is a combination of a light emitting element and a light receiving element, n light emitting elements (n is any natural number) and n light receiving elements corresponding thereto; n optical sensors combining elements, n diodes coupled to the n light receiving elements, one photocurrent detection resistor through which the output current of the n diodes flows, and the photocurrent detection resistor. one voltage amplifier that amplifies the voltage of the voltage amplifier, one voltage comparator that inputs the output signal of the voltage amplifier to detect the presence or absence of a medium, and one voltage comparator that inputs and holds the output signal of the voltage comparator. n D-type flip-flops, a light emitting element lighting circuit for lighting any one of the light emitting elements, and n for holding an output signal of the voltage comparator.
A control circuit operates the light emitting element lighting circuit to light up any one light emitting element among the n light emitting elements, and at the same time, a corresponding one D flip-flop is provided. An optical sensor circuit characterized in that the output signal from the voltage comparator is held by operating a type flip-flop. 2. Input the output signals of a light emitting element group having n light emitting elements, a light receiving element group having n light receiving elements corresponding to each of the n light emitting elements, and each of the n light receiving elements. a diode group having n diodes, one photocurrent detection resistor through which the output current of the n diodes flows, one voltage amplifier that amplifies the voltage of the photocurrent detection resistor, and the voltage amplifier a voltage comparator that inputs the output signal of the voltage comparator to detect the presence or absence of a medium, n D-type flip-flops that input and hold the output signal of the voltage comparator, and corresponds to each of the n light emitting elements. a light-emitting element lighting circuit having n driving units, and operating any one driving unit in the light-emitting element lighting circuit;
and one control circuit that drives a holding operation of one D-type flip-flop corresponding to the one driving section among the D-type flip-flops.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2160159A JPH0450791A (en) | 1990-06-19 | 1990-06-19 | Photosensor circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2160159A JPH0450791A (en) | 1990-06-19 | 1990-06-19 | Photosensor circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0450791A true JPH0450791A (en) | 1992-02-19 |
Family
ID=15709146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2160159A Pending JPH0450791A (en) | 1990-06-19 | 1990-06-19 | Photosensor circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0450791A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07198484A (en) * | 1993-12-29 | 1995-08-01 | Nec Corp | Detection circuit of photosensor signal |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5973785A (en) * | 1982-10-20 | 1984-04-26 | Hitachi Ltd | Apparatus for detecting light shielding object |
JPS6133147A (en) * | 1984-04-17 | 1986-02-17 | グラクソ、グル−プ、リミテツド | Phenethanolamine compound |
-
1990
- 1990-06-19 JP JP2160159A patent/JPH0450791A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5973785A (en) * | 1982-10-20 | 1984-04-26 | Hitachi Ltd | Apparatus for detecting light shielding object |
JPS6133147A (en) * | 1984-04-17 | 1986-02-17 | グラクソ、グル−プ、リミテツド | Phenethanolamine compound |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07198484A (en) * | 1993-12-29 | 1995-08-01 | Nec Corp | Detection circuit of photosensor signal |
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