[특허]Failsafe monitoring system with input controlled switch circuits

[미국특허] Failsafe monitoring system with input controlled switch circuits 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02H-007/10
출원번호	US-0726885 (1985-04-24)
우선권정보	JP-0083529 (1984-04-25)
발명자 / 주소	Futsuhara Koichi (Omiya JPX)
출원인 / 주소	Nippon Signal Co., Ltd. (JPX 03)
인용정보	피인용 횟수 : 21 인용 특허 : 5

초록 ▼

According to the load-driving switch circuit monitoring system of the present invention, on-off control of a switch circuit connected to in a circuit in series for driving an electric load is performed according to a fail-safe input signal Si, and conduction or non-conduction of the switch circuit is detected based on a load current in the driving circuit. An input signal converter and a load current signal converter, each of which puts out two different voltage values according to the input signal and load current detection signal and a signal of a problem of the converters per se, are arranged. A monitor signal generator is disposed to monitor only the normal correspondence relation (S) between the input signal Si and load current in the normal function state of the switch circuit among said three outputs generated by each converter. This monitor signal generator generates a high voltage output only when this normal correspondence relation (S) is detected, and when the correspondence relation is not normal or when a problem takes place in the input signal converter or the load current signal converter, the monitor signal generator generates a low voltage output, whereby malfunction of the load by the problem in the switch circuit and both the converters is monitored.

대표청구항 ▼

A monitoring system, which comprises a circuit which drives an electric load, a switch circuit performing on-off control of said driving circuit on receipt of an input signal Si consisting of two different voltages, fail-safe input signal converting means for converting said input signal Si of the two voltages to a predetermined first voltage corresponding to the value of the input signal Si turning on said switch circuit, a predetermined second voltage corresponding to the value of the input signal Si turning off said switch circuit and a predetermined third voltage corresponding to a problem of said input signal converting means itself and putting out said three voltages, fail-safe load current detecting means for detecting a load current in said driving circuit and generating two different voltages corresponding to the flow state and non-flow state of said load current, respectively, fail-safe load current signal converting means for converting the two different voltage inputs from said load current detecting means to a predetermined fourth voltage corresponding to the flow state of the load current, a predetermined fifth voltage corresponding to the non-flow state of the load current and predetermined sixth voltage corresponding to a problem of said load current signal means itself and putting out said three voltages, and fail-safe monitor signal generating means, in which said three output voltages of said input signal converting means and said three output voltages of said load current signal converting means are put and which generates a voltage output corresponding to the normal state only when at least one of the condition that the first and fourth voltage signals are simultaneously put in and the condition that the second and fifth voltage signals are simultaneously put in is satisfied and generates a voltage output corresponding to the abnormal state under other conditions.

이 특허에 인용된 특허 (5) 인용/피인용 타임라인 분석

Osborne, Colin T., Apparatus for monitoring current levels in an a.c. transmission line.
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Claussen Claus-Jrgen (Leimen DEX), Driving circuit for short circuit-proof readout stages.
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Schnaibel Eberhard (Hemmingen DT), Safety interlock circuit for switching brake antilock systems in a tractor trailer vehicle combination in and out.
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Gray, Randall C.; Jarrett, Robert B., Short detection circuit and method for an electrical load.
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Ayer John B. (Ontario CAX), Voltage controlled current switch with short circuit protection.
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이 특허를 인용한 특허 (21) 인용/피인용 타임라인 분석

Anzai Hiroji (Tochigi-ken JPX) Sugiyama Takashi (Tochigi-ken JPX) Ishioroshi Tetsuya (Tochigi-ken JPX) Kato Masakazu (Saitama-ken JPX), Control circuit for a fail-safe multi-axis light beam type sensor.
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Futsuhara Koichi (Saitama-ken JPX) Sakai Masayoshi (Saitama-ken JPX), Current sensor and motor rotation sensor using such current sensor.
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Suzuki Masatoshi,JPX ; Futsuhara Koichi,JPX ; Sakai Masayoshi,JPX, Drive control apparatus for a rotating machine.
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Futsuhara Koichi,JPX ; Sakai Masayoshi,JPX, Electromagnetic relay drive circuit.
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Shirai Toshihito,JPX ; Anzai Hiroji,JPX ; Futsuhara Koichi,JPX, Fail-safe signal transmitting apparatus producing a logical product of an input signal and a carrier signal.
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Shirai Toshihito,JPX ; Futsuhara Koichi,JPX, Fail-safe timing circuit and on-delay circuit using the same.
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Sakai Masayoshi (Urawa JPX) Futsuhara Koichi (Urawa JPX), Load driving circuit.
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Jinno Yoshitaka,JPX ; Ozaki Yoshiharu,JPX ; Okada Norihiro,JPX ; Mazawa Heisaku,JPX ; Fujimoto Hidetoshi,JPX ; Toda Junya,JPX ; Futsuhara Koichi,JPX ; Asada Norihiro,JPX, Monitoring apparatus and control apparatus for traffic signal lights.
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Jinno, Yoshitaka; Ozaki, Yoshiharu; Okada, Norihiro; Mazawa, Heisaku; Fujimoto, Hidetoshi; Toda, Junya; Futsuhara, Koichi; Asada, Norihiro, Monitoring apparatus and control apparatus for traffic signal lights.
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XuYang Zhou (Saitama-ken JPX) Futsuhara Koichi (Saitama-ken JPX) Sakai Masayoshi (Saitama-ken JPX), Monitoring apparatus for an alarm device.
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Sakai Masayoshi (Saitama-ken JPX) Futsuhara Koichi (Saitama-ken JPX), Motor rotation judgement circuit and apparatus using such circuit for verifying that a motor is stopped.
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Sakai Masayoshi,JPX ; Shirai Toshihito,JPX ; Anzai Hiroji,JPX ; Futsuhara Koichi,JPX, Motor stopped verification apparatus.
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Futsuhara Koichi,JPX ; Tajima Junpei,JPX ; Shirai Toshihito,JPX, Motor stopped verification sensor.
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Shirai, Toshihito; Futsuhara, Koichi, Optical barrier device.
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Toshihito Shirai JP; Masayoshi Sakai JP; Koichi Futsuhara JP; Takayuki Yuasa JP, Power supply unit.
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Schmitz Frank,DEX ; Klees Christoph,DEX, Protective circuit.
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Ichikawa Masato (Tokyo JPX) Futsuhara Koichi (Saitama-ken JPX) Sakai Masayoshi (Saitama-ken JPX), Residual pressure sensor and residual pressure sensor monitoring apparatus.
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Sugimoto Noboru (Tokyo JPX) Suzuki Masatoshi (Yokohama JPX) Futsuhara Koichi (Urawa JPX) Sakai Masayoshi (Urawa JPX) Mihira Ritsuo (Tokyo JPX), Safety ensuring apparatus.
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Futsuhara Koichi,JPX, Safety securing device.
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Stecklein Toby James, Single event upset immune comparator.
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Pauly Jean (Lisses FRX), Testable input/output circuit for a load decoupled by a transformer.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Failsafe monitoring system with input controlled switch circuits 원문보기