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1. 发明专利

JPH0688924A STRUCTURE FOR COUPLING PHOTOELECTRIC CONVERSION ELEMENT AND OPTICAL FIBER 失效
公开(公告)号：JPH0688924A
公开(公告)日：1994-03-29
申请号：JP23985692
申请日：1992-09-09
申请人： HOKUYO AUTOMATIC CO , FUJI ELECTRIC CO LTD
发明人： MORI TOSHIHIRO , MAKINO SETSUO , TANIGAWA KIYOSHI , FUJIKAKE AKIO
IPC分类号： G02B6/42 , H01H35/00
摘要： PURPOSE:To improve the light transmission efficiency between a photoelectric conversion element and an optical fiber by having two pieces of lenses in such a manner that the light emitted from one of these lenses is once collimated to collimated beams of light and is focused at the other. CONSTITUTION:This photoelectric conversion element 1 is provided with a chip 11 on its pedestal 10. The first lens 13 is formed on a transparent case 12 covering the chip 11. The lens 13 is aligned in its optical axis to the chip 11 and is disposed apart the focal length therefrom. The optical fiber 4 has a transparent end 6 and the second lens 7 is formed at the transparent end 6. The lens 7 is aligned in its optical axis to the end face of the optical film 4 and is disposed apart the focal length therefrom. the lens 7 is aligned in its optical axis to the lens 13 and is disposed in tight contact with the lens 13. The light Ls projected from the chip 11 of the photoelectric conversion element 1 is collimated by the lens 13 to the collimated beams of light and is focused at the end face of the optical fiber 4 by the lens 7.

2. 发明专利

JPS61198918A INTEGRATED CIRCUIT FOR CONTACTLESS DETECTION SWITCH 失效
公开(公告)号：JPS61198918A
公开(公告)日：1986-09-03
申请号：JP3739285
申请日：1985-02-28
申请人： FUJI ELECTRIC CO LTD , HOKUYO AUTOMATIC CO
发明人： TANIGAWA KIYOSHI , HASEGAWA KIYOSHI , KOBASHI RIKIYA , MIYAUCHI TADANORI
IPC分类号： H03K17/94 , H03K17/78 , H03K17/945
摘要： PURPOSE:To select freely the current consumption and operating speed by providing a switching circuit for the operating current of a detection circuit subject to circuit integration. CONSTITUTION:The detection circuit 2 gives a pulse signal from an internal pulse generating circuit to a base of a transistor (TR) 6 via a terminal 108. The TR 6 receives a power voltage from a power terminal 103 and gives a projected light pulse current to an LED 8 in response to the pulse from the detection circuit 2. The light of the LED 8 is received by a photo TR 10, and the photodetection signal from the photo TR 10 is inputted to the detection circuit 2. The detection circuit 2 discriminates whether or not a path between the LED 8 and the photo TR 10 is shut by something. When both terminals 106 and 107 are connected to a current consumption switching circuit 11, an injector current of the TR is increased to attain high speed operation of the detection circuit 2.

3. 发明专利

JPS61198093A PHOTOELECTRIC SWITCH 失效
公开(公告)号：JPS61198093A
公开(公告)日：1986-09-02
申请号：JP3902785
申请日：1985-02-28
申请人： HOKUYO AUTOMATIC CO , FUJI ELECTRIC CO LTD
发明人： KOBASHI RIKIYA , MIYAUCHI TADANORI , TANIGAWA KIYOSHI , HASEGAWA KIYOSHI
IPC分类号： G01B11/00 , G01V8/12
摘要： PURPOSE:To manufacture a switch which can use selectively a synchronizing system and a period detecting system, by a simple parts constitution, by clearing a frequency dividing circuit by using a photodetecting pulse which has been generated by a prescribed timing. CONSTITUTION:A changeover switch 5 is turned on to a timing clock T2 side, a signal which has been generated by an oscillating circuit 1 is divided by a frequency-dividing circuit 2 and a timing clock is oscillated, and a switch of a synchronizing system is operated. Also, the switch 5 is turned on to a projecting use oscillating circuit 4 side and a projecting element 3 emits light by an oscillated output, and a period detecting system is operated. In a synchro nization detecting system, when a photodetector executes photodetection, a frequency dividing ratio of the circuit 2 is varied by an operation of a synchroni zation detecting circuit 11, the photodetecting timing is made to coincide with the projecting timing, and a photodetecting state is decided by an integration circuit 10. The switch of the respective systems is constituted of common parts except the circuits 4, 11.

4. 发明专利

JPH07212208A OPTICAL FIBER TYPE PHOTOELECTRIC SWITCH 失效
公开(公告)号：JPH07212208A
公开(公告)日：1995-08-11
申请号：JP731594
申请日：1994-01-27
申请人： HOKUYO AUTOMATIC CO , FUJI ELECTRIC CO LTD
发明人： MORI TOSHIHIRO , SHIMAJI NAOHIRO , MAKINO SETSUO , TANIGAWA KIYOSHI
IPC分类号： H03K17/78
摘要： PURPOSE:To confirm whether the optical axes of optical fibers are matched or not at a detection part by alternately projecting first and second flood pulses when the level of a photodetected pulse provided at a photodetection part exceeds a detective level. CONSTITUTION:When the optical axes of optical fibers are matched, the level of the photodetected pulse gets higher than the level to be detected by a comparator 23, and the comparator 23 outputs a pulse. This pulse output is inputted to a detection circuit 24, the pulse output of the comparator 23 at the time of outputting a pulse from an AND gate 16 is validized and when this valid pulse output is applied plural times such as continuously several times, for example, a detecting signal P1 is outputted. Since a pulse output b8 frequency- divided into eight stages is inputted from a frequency divider circuit 12 to one input terminal of an OR gate 42, the pulse output b8 is inputted to an input terminal (a) of a selector circuit 47, and the pulse output of the AND gate 16 with the narrow pulse duration and a pulse output b4 of the frequency divider circuit 12 with the wide pulse duration are alternately selected.

5. 发明专利

JPH06283992A PULSE MODULATION TYPE PHOTOELECTRIC SWITCH 失效
公开(公告)号：JPH06283992A
公开(公告)日：1994-10-07
申请号：JP7059493
申请日：1993-03-30
申请人： HOKUYO AUTOMATIC CO , FUJI ELECTRIC CO LTD
发明人： MORI TOSHIHIRO , MAKINO SETSUO , SHIMAJI NAOHIRO , TANIGAWA KIYOSHI
IPC分类号： H03K17/78
摘要： PURPOSE:To prevent the pulse modulation type photoelectric switch from malfunctioning owing to pulse light such as projection pulse light from, for example, another photoelectric switch which is arranged nearby. CONSTITUTION:This photoelectric switch is provided with an oscillation period control circuit 9 which inputs both the inverted signal (g) of the photodetection pulse signal (2nd photodetection pulse signal) from a flip-flop 7 and the projection pulse signal (a) from a pulse oscillation circuit 1, detects the photodetection phase of the photodetection pulse light for the projection pulse signal from the signals, and outputs a control signal (h) for varying the pulse period of the projection pulse signal (a) for the pulse oscillation circuit 1 according to the photodetection phase.

6. 发明专利

JPH05335924A 失效
公开(公告)号：JPH05335924A
公开(公告)日：1993-12-17
申请号：JP16071491
申请日：1991-07-02
申请人： HOKUYO AUTOMATIC CO , FUJI ELECTRIC CO LTD
发明人： MIYAUCHI TADANORI , TANIGAWA KIYOSHI
IPC分类号： G05F1/56 , H03K17/945
摘要： PURPOSE:To obtain a simple and inexpensive 2-wire contactless switch by adopting a depletion field effect transistor(TR) for a series control element for a constant voltage circuit. CONSTITUTION:A depletion field effect transistor(TR) 513 is adopted for a series control element for a constant voltage circuit 5, a collector of a TR 53 being a component of a differential amplifier circuit is connected to a source being an output of the FET 513 and a collector of a TR 54 is connected to a gate of the FET 513. At application of power, the FET 513 acts like a constant current element to suppress a charging current flowing to a capacitor 4. When the charging voltage of the capacitor 4 increases and a voltage at a voltage division point by resistors 57, 58 to which a base of the TR 54 is connected exceeds a Zener voltage of a Zener diode 52 to which a base of the TR 53 is connected, the TR 54 is turned on, a voltage is generated across a resistor 514, a gate voltage of the FET 513 is decreased, the current flowing to the FET 513 is decreased to make an output voltage of the constant voltage circuit 5 constant.

7. 发明专利

JPS61198092A PHOTOELECTRIC SWITCH 失效
公开(公告)号：JPS61198092A
公开(公告)日：1986-09-02
申请号：JP3902685
申请日：1985-02-28
申请人： HOKUYO AUTOMATIC CO , FUJI ELECTRIC CO LTD
发明人： KOBASHI RIKIYA , MIYAUCHI TADANORI , TANIGAWA KIYOSHI , HASEGAWA KIYOSHI
IPC分类号： G01B11/00 , G01V8/12
摘要： PURPOSE:To determine the timing of projection and photodetecting by not only a self-specified oscillation frequency but also a control signal from the outside by providing a simple terminal. CONSTITUTION:A frequency dividing circuit 9 divides an output which has been oscillated by an oscillating circuit as a self-specified frequency, generates repeatedly a timing clock, and determines the timing of projection and photodetecting. A clock signal from the outside is inputted from an external clock input terminal 12 without providing a special circuit, passes through the circuit 8 as a mere buffer, and it is inputted to the circuit 9 and frequency- divided. The circuit 9 is cleared by an external signal which is inputted to a clear terminal 13. In this way, plural photoelectric switches having intrinsic projection and photodetecting timings are placed in parallel, and can be used under the projection and photodetecting timing control from the specified outside.

8. 发明专利

JPS61198089A DETECTING CIRCUIT FOR PHOTOELECTRIC SWITCH 失效
公开(公告)号：JPS61198089A
公开(公告)日：1986-09-02
申请号：JP3902185
申请日：1985-02-28
申请人： HOKUYO AUTOMATIC CO , FUJI ELECTRIC CO LTD
发明人： KOBASHI RIKIYA , MIYAUCHI TADANORI , TANIGAWA KIYOSHI , HASEGAWA KIYOSHI
IPC分类号： G01B11/00 , G01V8/12
摘要： PURPOSE:To obtain a titled circuit having high accuracy by digitizing a synchronization detecting circuit for deciding a fact that a titled switch is in a prescribed photodetecting state or light shielding state. CONSTITUTION:Outputs of the first and the second storing circuits 9, 10 are received through a coincidence detecting circuit 11, and its coincidence or dissidence is detected and outputted. Subsequently, an output of the coincidence detecting output 11 is passed through the first gate circuit 13. Next, a count-up output is generated through a dissidence frequency counter 14. Thereafter, the storage contents of the first storing circuit 9 are transferred to the second storing circuit 10 by the count-up output of the dissidence frequency counter 14. In this way, a synchronization detecting circuit can be digitized, and made to have high accuracy.

9. 发明专利

JPS61198916A PHOTODETECTING LEVEL DISPLAY DEVICE OF PHOTOELECTRIC SWITCH 失效
公开(公告)号：JPS61198916A
公开(公告)日：1986-09-03
申请号：JP3739585
申请日：1985-02-28
申请人： FUJI ELECTRIC CO LTD , HOKUYO AUTOMATIC CO
发明人： TANIGAWA KIYOSHI , HASEGAWA KIYOSHI , KOBASHI RIKIYA , MIYAUCHI TADANORI
IPC分类号： G01J1/00 , G01R31/26 , H03K17/78
摘要： PURPOSE:To attain circuit integration of the titled device by using a flip-flop reset by a separate pulse from a projected pulse so as to store and display the photodetection level. CONSTITUTION:The period of a pulse generating circuit 22 is decided by a capacitor 23. Flip-flops (FFs) 25-27 are set/reset type FFs and reset periodically by an output of the pulse generating circuit 22 to store a photodetecting signal (outputs of comparators 6, 7, 8) during the period. FFs 35-37 are D FFs and store the storage content of the FFs 25-27 by using the next output of the pulse generating circuit 22 and its output is a detection output of a photoelectric switch. When the photodetection level is stable sufficiently, an LED 21 is displayed.

10. 发明专利

JPS61198094A PHOTOELECTRIC SWITCH 失效
公开(公告)号：JPS61198094A
公开(公告)日：1986-09-02
申请号：JP4009185
申请日：1985-02-28
申请人： FUJI ELECTRIC CO LTD , HOKUYO AUTOMATIC CO
发明人： TANIGAWA KIYOSHI , HASEGAWA KIYOSHI , KOBASHI RIKIYA , MIYAUCHI TADANORI
IPC分类号： G01V8/12
摘要： PURPOSE:To generate malfunction even if many switches are used simultaneously without connecting them electrically, by counting a prescribed number of continuous pulses, and thereafter, changing the generation time of the next projecting pulse. CONSTITUTION:Light of a projecting part 1, which has been emitted by an output of a pulse generating circuit 6 is made incident on a photodetecting part 2, measured by a counter circuit 9, and when the number of measurement becomes the first value which has been prescribed, the next pulse generation time is changed by a pulse controlling circuit 10, and when said number exceeds the second value which has been prescribed, a detecting signal is outputted. When the projecting part 1 and the photodetecting part 2 are cut off by a body to be detected, even if a transistor 23 photodetects a projecting pulse of the almost same period as a pulse generated by the circuit 6, from other light source, an output of an inverter 32 is inverted, a gate 34 clears a counter 35, and a switch executes no malfunction. Also, when the projecting part 1 and the photodetecting part 2 are not cut off, in case when synchronizing light has been incident from the outside, the synchronization is broken at this time, and the circuit 9 stops counting, therefore, the switch executes no malfunction.

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