• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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  • 引用文献
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    • 专利摘要:
    1531428 Presence or absence of moving bodies GENERAL ELECTRIC CO 19 Dec 1975 [20 Dec 1974] 52127/75 Heading G1A [Also in Division G3] A system for detecting the presence or absence of bodies 11-13 --- of known dimensions and spacing as they pass a point at a given rate.comprises a light source and a photo-cell, the path between which is periodically interrupted by the bodies so that the photo-cell generates an electrical signal having on and off intervals corresponding to the presence and absence of light respectively, means for comparing part of the electrical signal with a signal from a reference source to produce an error signal, means responsive to which modifies the light in a sense tending to stabilize the electrical signal. Light emitting diode LED sends light through type fingers 11-13 --- on a moving belt to phototransistor P1. Resistor R7 and capacitor C2 filter high frequency noise. Resistors R8, R9 and capacitor C3 supply substantially the average voltage across R7 as a reference for comparator OA2, whose output voltage is thus the deviation from the mean and drives transistors Q2, Q3 giving a squarewave output. Because the on to off time ratio may not be 45/55 which is the actual dimension spacing ratio feedback is provided on line 20 to an integrating amplifier circuit comprising amplifier OA1, capacitor Cl and resistor R3, so that the average output signal is compared with a reference from potential divider R1, R2. Thus the amplified errors signal is applied via diode CR2 to transistor Ql to alter the output of the LED and hence the instant at which the output from Q2, Q3 changes from 0 to +5V and vice versa. When the belt motor is not running, input signal MTR is logic 0 so that OR gate Gl allows reduction of power to the LED, and potential divider R8, R9 maintains the output voltage of OA2 positive. The integrating circuit integrates the squarewave output for substantially one font of type bearing fingers, the effect of the presence of one wide finger being negligible.
    公开号:SU803870A3
    申请号:SU752301654
    申请日:1975-12-18
    公开日:1981-02-07
    发明作者:Эрлен Хэнджер Уильям
    申请人:Дженерал Электрик Компани (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the field of computer technology and is intended to synchronize registration devices. It is known a device for converting an electric signaling system, containing an optical system, a photoelectric converter and logic elements l. The closest technical solution to the invention is a synchronization unit for recording devices containing a light source optically connected to the light nick, the light source input is connected to the first and an amplifier whose input is connected to the integrator's output, the first input of which is connected to the integrator's output, the first input which is connected to the output of the second amplifier and the input of the valve 2. However, the accuracy of these blocks of synchronization is insufficient. The aim of the invention is to improve the accuracy of work. The goal is achieved by the fact that the synchronization unit contains a source of reference voltage and successively connected noise filter and a comparator whose output is connected to the input (4 second amplifiers, the input of the noise filter is connected to the output of the light receiver, and the second input of the integrator is connected to the output of the reference voltage The block diagram of the device is shown in the drawing.The synchronization unit contains the source of the reference voltage 1, the integrator 2, the first amplifier E, the noise filter 4, co1 "1 actor 5, the second amplifier 6, The fan 7, the light source 8 and the light carrier 9. The synchronization unit works as follows: When the light flux from the light source 8 is interrupted by the printing pins 10 on the light receiver 9, a signal is generated. From the last output, the signal goes to the filter input 4 and then to the comparator 5. The other input of the comparator 5 receives a reference voltage generated inside the noise filter 4. The voltage output from the output of the comparator 5 to the input of the second amplifier 6 reflects the change in the luminous flux entering the input from the output of the amplifier 6, the voltage is applied to one input of the integrator 2, to the other input of which voltage is supplied from the output of the source of the reference voltage 1. In case of difference in the output voltage from the amplifier and voltage from the output source of reference voltage 1 voltage mismatch through the integrator 2 is fed to the input of the amplifier 3. The voltage from the output of the latter is fed to the input of the light source 8, carried out the regulation of its radiation.
    Thus, the error signal generated at the output of integrator 2 controls the temporal relations in the output signal from the output of amplifier 6. At the same time, the signal from the output of the latter is fed to one input of the valve 7, to the other input of which signals from the input of the synchronization unit . At the same time, at the output of the valve 7, signals are generated that go to the output of the device for controlling the hysteresis device.
    Technical and economic efficiency of the invention is to improve the accuracy of the synchronization unit
    权利要求:
    Claims (2)
    [1]
    1. Japan Patent1 No. 52-37736, Cl, G Q6 F 3/02, 1972.
    [2]
    2. USSR author's certificate
    No. 471345, cl. G About F 3/02, 1972 (prototype).
    and.,. A. ft -,. L Cf /
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE2549793A1|1976-07-01|
    DK147744B|1984-11-26|
    NL7514677A|1976-06-22|
    AU8632475A|1977-05-12|
    DK147744C|1985-05-20|
    GB1531428A|1978-11-08|
    AU503899B2|1979-09-27|
    IT1051678B|1981-05-20|
    SE7514319L|1976-06-21|
    SE402657B|1978-07-10|
    FR2295471A1|1976-07-16|
    FR2295471B1|1981-08-21|
    DK578875A|1976-06-21|
    CA1059594A|1979-07-31|
    US3956628A|1976-05-11|
    JPS5186325A|1976-07-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    NL270613A|1960-10-26|
    US3403259A|1966-02-11|1968-09-24|Hughes Aircraft Co|Quadrature voltage generator|
    US3473084A|1967-12-06|1969-10-14|Automatic Power Inc|Constant intensity lamp control with an optical feedback control|
    US3631250A|1970-02-13|1971-12-28|Us Navy|Optical positive feedback sensor circuit|
    US3588086A|1970-03-18|1971-06-28|Bell & Howell Co|Insertion machine having feedback light control system|
    US3755687A|1972-03-30|1973-08-28|Itt|Pulse generator|
    US3725665A|1972-03-31|1973-04-03|Itt|Pulse generator|
    DE2318830A1|1973-04-13|1974-10-24|Siemens Ag|LIGHT BARRIER FOR READING OPTICAL INFORMATION CARRIERS|JPS57125851A|1981-01-29|1982-08-05|Toyota Motor Corp|Detector for number of revolutions|
    DE3409818A1|1984-03-16|1985-09-26|Siemens AG, 1000 Berlin und 8000 München|Optoelectronic scanning system with automatic balancing|
    US4740686A|1986-09-09|1988-04-26|The Perkin-Elmer Corporation|Optical sensor circuitry|
    US5596477A|1993-05-03|1997-01-21|Faraday, Inc.|Contactless signaling device|
    GB2280802A|1993-07-17|1995-02-08|Sabed Ltd|An improved detector circuit|
    US5529429A|1993-10-29|1996-06-25|Pelegrin; Oscar D.|Traffic control assembly|
    CN1235178C|2001-10-16|2006-01-04|吉鸿电子股份有限公司|Automatic adjustable paper money identification system for paper money exchange machine|
    JP4723968B2|2005-09-29|2011-07-13|ハウス食品株式会社|Packaging box|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/534,597|US3956628A|1974-12-20|1974-12-20|Light sensitive detection system|
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