Photoelectric sensor and detector terminal module therefor
First Claim
1. A detection terminal module for a photoelectric sensor, said detection terminal module comprising:
- an optical assembly including a lens and a holder which holds said lens; and
a detection circuit assembly which is integrally formed with said optical assembly and includes an integrated circuit and terminals connected to said integrated circuit;
wherein said integrated circuit includes;
a detection circuit for detecting presence or absence of a target object of detection for said photoelectric sensor from a light-reception signal obtained by converting light received through said lens into an electrical signal by a light receiving element,a self-analysis circuit for judging the signal level of said light-reception signal by comparing the signal level of said light-reception signal with a specified threshold value, anda judging circuit for judging presence or absence of light entering said light receiving element or operating condition of said photoelectric sensor inclusive of result of judging by said self-analysis circuit;
said terminals including;
a control output terminal for transmitting outputs of said detection circuit,a stability display terminal for transmitting outputs of said self-analysis circuit,an indicator terminal for transmitting outputs of said judging circuit,a sensor power source terminal for supplying power for said integrated circuit, anda GND terminal for keeping said integrated circuit at the zero voltage level;
wherein said module serves to form sensor products of different kinds by connecting electrically through said terminal to an output circuit provided external to said detection circuit assembly.
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Accused Products
Abstract
A module from which photoelectric sensors of different types with different functions can be constructed is integrally formed with an optical assembly and a detection circuit assembly. The optical includes a lens and its holder and the detection circuit assembly and includes an integrated circuit and terminals connected to it. The integrated circuits include different circuits with various functions such as a detection circuit for detecting presence or absence of a target object of detection. The terminals include input and output terminals for passing signals to and from selected ones of these circuits depending on the desired functions of the photoelectric sensor to be formed by using the module.
2 Citations
17 Claims
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1. A detection terminal module for a photoelectric sensor, said detection terminal module comprising:
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an optical assembly including a lens and a holder which holds said lens; and a detection circuit assembly which is integrally formed with said optical assembly and includes an integrated circuit and terminals connected to said integrated circuit; wherein said integrated circuit includes; a detection circuit for detecting presence or absence of a target object of detection for said photoelectric sensor from a light-reception signal obtained by converting light received through said lens into an electrical signal by a light receiving element, a self-analysis circuit for judging the signal level of said light-reception signal by comparing the signal level of said light-reception signal with a specified threshold value, and a judging circuit for judging presence or absence of light entering said light receiving element or operating condition of said photoelectric sensor inclusive of result of judging by said self-analysis circuit; said terminals including; a control output terminal for transmitting outputs of said detection circuit, a stability display terminal for transmitting outputs of said self-analysis circuit, an indicator terminal for transmitting outputs of said judging circuit, a sensor power source terminal for supplying power for said integrated circuit, and a GND terminal for keeping said integrated circuit at the zero voltage level; wherein said module serves to form sensor products of different kinds by connecting electrically through said terminal to an output circuit provided external to said detection circuit assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A photoelectric sensor comprising:
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a detection terminal module having an optical assembly including a lens and a holder which holds said lens and a detection circuit assembly which is integrally formed with said optical assembly and includes an integrated circuit and terminals connected to said integrated circuit; an output terminal module having an output circuit incorporated therein; and a case that holds said detection terminal module and said output terminal module; wherein said integrated circuit includes; a detection circuit for detecting presence or absence of a target object of detection for said photoelectric sensor from a light-reception signal obtained by converting light received through said lens into an electrical signal by a light receiving element, a self-analysis circuit for judging the signal level of said light-reception signal by comparing the signal level of said light-reception signal with a specified threshold value, and a judging circuit for judging presence or absence of light entering said light receiving element or operating condition of said photoelectric sensor inclusive of result of judging by said self-analysis circuit; said terminals including; a control output terminal for transmitting outputs of said detection circuit, a stability display terminal for transmitting outputs of said self-analysis circuit, an indicator terminal for transmitting outputs of said judging circuit, a sensor power source terminal for supplying power for said integrated circuit, and a GND terminal for keeping said integrated circuit at the zero voltage level; wherein said output terminal module includes; an output circuit for outputting an object detecting signal indicative of detection of an object to outside said photoelectric sensor based on a signal from said control output terminal, a first driver circuit for driving a stability displaying first light emitting element based on a signal from said stability display terminal, and a second driver circuit for driving an indicator second light emitting element based on a signal from said indicator terminal; wherein said detection terminal module and said output terminal module are electrically connected at least through said control output terminal, said stability display terminal, said indicator terminal, said sensor power source terminal and said GND terminal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification