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1. 发明专利

JPH0887690A GAS LEAKAGE ALARM 失效
公开(公告)号：JPH0887690A
公开(公告)日：1996-04-02
申请号：JP22117894
申请日：1994-09-16
申请人： FUJI ELECTRIC CO LTD
发明人： TANIGAWA KIYOSHI
IPC分类号： G01N27/00 , G08B21/00 , G08B21/16 , G08B23/00
摘要： PURPOSE: To provide the gas leakage alarm with which alarms at the plural levels of volume can be issued and a volume operation can be easily checked. CONSTITUTION: Concerning the gas leakage alarm provided with a sensor bridge circuit 4, comparator 6 for comparing its output with a prescribed level and outputting a detecting signal, gas detecting signal processing circuit 7 for receiving its output and outputting a gas alarm, sound signal generating circuit 8 for receiving its output and generating a sound signal and sounder 10 for converting the sound signal to a sound, this alarm is equipped with an amplification factor switch amplifier circuit 9 and a one-shot signal generating circuit 11, the output of the amplifier circuit 9, where the output sound signal of the sound signal generating circuit 8 is inputted and this is amplified, is inputted to the sounder 10 and besides, the output of the one-shot signal generating circuit receiving the output of the gas detecting signal processing circuit 7 is inputted to the amplification factor switching circuit of the amplifier circuit 9. Thus, the volume of the sounder 10 are turned to two of low and high levels corresponding to the presence/absence of a one-shot signal.

2. 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.

3. 发明专利

JPH06315262A SWITCHING REGULATOR 失效
公开(公告)号：JPH06315262A
公开(公告)日：1994-11-08
申请号：JP10162493
申请日：1993-04-28
申请人： FUJI ELECTRIC CO LTD
发明人： TANIGAWA KIYOSHI , ISURUGI HIDEKI
IPC分类号： H02M3/155
摘要： PURPOSE:To prevent the turn off operations of a switching element from becoming slower due to a Miller phenomenon. CONSTITUTION:This regulator has a short-circuiting means 22 which short- circuits the emitter of an output transistor 8 which is used as a switching element at the time of turning off the transistor 8 with he emitter of the transistor 8. The means 22 is constituted of, for example, a first resistor 18 which is connected in series with the base of the transistor 8, a depletion type FET 19 in which the drain and source are respectively connected to the emitter and base of the transistor 8 and the gate of which is connected to the base of the transistor 8 through the resistor 18, and second resistor 9 connected between the emitter of the transistor 8 and gate of the FET 19.

4. 发明专利

JPH04101509A PROXIMITY SWITCH 失效
公开(公告)号：JPH04101509A
公开(公告)日：1992-04-03
申请号：JP21975290
申请日：1990-08-21
申请人： FUJI ELECTRIC CO LTD
发明人： TANIGAWA KIYOSHI , TAKAHASHI FUMITO , YAMASAKI TAKAO
IPC分类号： H03K17/945 , H03K17/95
摘要： PURPOSE:To detect the disconnection of a detected coil by comparing the voltage of a resonance circuit with a prescribed level. CONSTITUTION:When detecting coil 7 of a resonance circuit is disconnected, the resonance circuit stops oscillation, a voltage VP at point P rises by the value obtained by subtracting the emitter/collector voltage VCE of transistor 12 from a voltage VS, and when setting in advance a reference voltage VREF higher than a voltage VCE between the emitter and collector, the reference voltage VREF exceeds a voltage VB obtained by subtracting a reference voltage VREF of reference battery 36 from a power supply voltage VS, so that the compare circuit 35 outputs a failure signal. Thus, using a relatively simple failure detecting circuit can detect the disconnection of the detecting coil.

5. 发明专利

JPH01320819A PHOTOELECTRIC SWITCH 失效
公开(公告)号：JPH01320819A
公开(公告)日：1989-12-26
申请号：JP15435588
申请日：1988-06-22
申请人： FUJI ELECTRIC CO LTD
发明人： TANIGAWA KIYOSHI
IPC分类号： H03K17/78
摘要： PURPOSE:To send the result of self-diagnosis externally in addition to an output as a photoelectric switch through one output transistor(TR) by using a selection circuit so as to switch a detection circuit into a storage circuit while a voltage of a delay circuit restores to a prescribed voltage after power is interrupted tentatively and applied again. CONSTITUTION:When a control power Vcc is applied, a voltage of a capacitor 23 is still low, but one input terminal of an AND circuit 12 of a selection circuit 13 goes to a high level via an inverter 18, the result of diagnosis of a self- diagnosing circuit 8 stored in the storage circuit 12 is outputted from a TR 9 via an AND circuit 20 and an OR circuit 21. When the capacitor 23 is charged and the voltage reaches a prescribed value, an AND circuit 19 is opened and an output of a detection circuit 7 is fed to a base of the TR 9. Thus, the photoelectric switch enters the normal operation. When the control power Vcc is interrupted tentatively and applied again, while the capacitor 23 is charged, the result of diagnosis stored in the storage circuit 12 is outputted from the TR 9.

6. 发明专利

JPH01311721A PHOTOELECTRIC SWITCH 失效
公开(公告)号：JPH01311721A
公开(公告)日：1989-12-15
申请号：JP14331588
申请日：1988-06-10
申请人： FUJI ELECTRIC CO LTD
发明人： TANIGAWA KIYOSHI
IPC分类号： H03K17/78
摘要： PURPOSE:To check dirt of a lens at the start of a photoelectric switch by reducing a pulse current of a light emitting element by a prescribed time only after application of a control power supply and diagnosing the propriety of the photoelectric switch depending on the output at that time. CONSTITUTION:With a control power supply VCC applied at a time t1, an oscillation circuit 3 is started and a pulse current IP flows to a resistor 4, a light emitting element 6 and a control circuit 11. Since a charging voltage Vc of a capacitor 15 rises gradually according to the CR time constant in this case, a TR 13 is not turned on till the voltage Vc reaches a prescribed value V3 at a time t2 and since the pulse current IP of the light emitting element 5 flows to only a resistor 12, the current is limited by the resistor 12 as shown in the current IP1. When the voltage amplifying a received pulse light of the photodetector 6 by an amplifier 7 does not exceed a prescribed level VL between times t1-t2, the voltage V4 of the comparator 8 is zero and the base voltage V0 of the TR 10 is zero as shown in broken lines, the TR 10 is not turned on and a defect of the photodetection switch is detected.

7. 发明专利

JPS62261221A REFLECTING TYPE PHOTOELECTRIC SWITCH 失效
公开(公告)号：JPS62261221A
公开(公告)日：1987-11-13
申请号：JP10440286
申请日：1986-05-07
申请人： FUJI ELECTRIC CO LTD
发明人： TANIGAWA KIYOSHI
IPC分类号： H03K17/14 , H03K17/78
摘要： PURPOSE:To detect an object to be detected at a prescribed position independently of the size of the object, the reflectance or a photodetecting area by providing a couple of photodetectors, two differential amplifiers and a comparator and outputting a detection signal when an output obtained by each photodetector reaches a prescribed rate to other output. CONSTITUTION:When both photo diodes 3, 4 receive a reflected light from an object 24, the result is inputted to an inverting input of the differential amplifiers 9, 10 as pulse voltages V1, V2. Further, the voltage V1 is divided by voltage division resistors 11, 12 and the result is fed to a non-inverting input of the differential amplifier 10 as a reference voltage V3. The voltage V2 is divided by voltage division resistors 13, 14, and the result is fed to a non-inverting input of the differential amplifier 9 as the reference voltage V4. Then the differential amplifier 10 amplifies the difference between the reference voltage V3 and a pulse voltage v2 to generate a voltage V5 across a resistor 19. A comparator 20, when the voltage V5 exceeds a prescribed level, generates a photodetection output voltage V6. An integration circuit 22 integrates the photodetection output voltage V6, converts it into a DC output and eliminates noise, and conducts a transistor 23 to output the detection signal of the object 24.

8. 发明专利

JPS62257076A COMPARING/MEASURING SYSTEM 失效
公开(公告)号：JPS62257076A
公开(公告)日：1987-11-09
申请号：JP9934186
申请日：1986-05-01
申请人： FUJI ELECTRIC CO LTD
发明人： NAKAJIMA SHINICHI , BIREI KENJIRO , TANIGAWA KIYOSHI
IPC分类号： G01S15/10
摘要： PURPOSE:To deal with the various alteration in specifications, by constituting the title system so that only clock frequency is altered without altering the constitution of a counter when a measuring range is altered. CONSTITUTION:The output of a transmission carrier signal oscillator 6 is supplied to an ultrasonic vibrator 1 through a pulse width modulation circuit 5, a power amplifying circuit 4, a transmission matching circuit 3 and a duplexer circuit 2 to emit an ultrasonic wave. The reflected ultrasonic wave is received by the ultrasonic vibrator 1 and inputted to CPU 21 through the duplexer circuit 2, a receiving matching circuit 8, an amplifying circuit 9 with AGC and a detection circuit 10. the max. count value of the clock counter CNT mounted in CPU 21 is predetermined and the frequency of a clock pulse is changed according to max. detection distances.

9. 发明专利

JPS5890827A DIRECT CURRENT TWO-WIRE TYPE PROXIMITY SWITCH 失效
公开(公告)号：JPS5890827A
公开(公告)日：1983-05-30
申请号：JP18836481
申请日：1981-11-26
申请人： FUJI ELECTRIC CO LTD
发明人： TANIGAWA KIYOSHI , TAKAHASHI FUMITO
IPC分类号： H01H36/00 , B29C44/12 , H03K17/06 , H03K17/945 , H03K17/95
摘要： PURPOSE:To supply sufficient current to a load, by supplying a circuit voltage of a detection circuit from a capacitor intermittently charged at detection and minimizing a terminal voltage of a proximity switch at conduction. CONSTITUTION:A DC two-wire type proximity switch 101 is constituted with a transistor (TR) 20, switching a part between terminals 1a, 1b connected to a series circuit of a power supply 2 and a load 3, a detection means controlling the TR20 energized from constant voltage circuits 21, 22, 23 together with a capacitor 24, and a comparison means which tentatively interrupts the TR20 when the voltage at the capacitor 24 is less than the lower limit and conducts the TR20 again when the voltage is more than the upper limit value after the voltage at the capacitor 24 is recovered. Thus, a voltage between terminals at switch condution is very small, and the amplitude of a current flowing to a load and the amplitude of the current flowing to the load can be made close to almost the same value as that by an ideal switch contact.

10. 发明专利

JPS5372980A SEQUENTIAL ACTION CIRCUIT 失效
公开(公告)号：JPS5372980A
公开(公告)日：1978-06-28
申请号：JP14920276
申请日：1976-12-10
申请人： FUJI ELECTRIC CO LTD
发明人： TANIGAWA KIYOSHI
IPC分类号： G05B19/02 , G05F1/70 , H02J3/18
摘要： PURPOSE:To provide a sequential action circuit which ensures that any one of plural electric machines is operated as frequently as the others, by such an arrangement that the order of stop of the machines accords to the order of start of the machines.

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