Door sensor with self-diagnosing function
First Claim
1. A door sensor with a self-diagnosing function, for sensing an object approaching a door panel and actuating the door panel in response to the sensing of the object, comprising:
- a light-emitting unit emitting light into a space or onto a floor near said door panel;
a light-receiving unit receiving light emitted by said light-emitting unit and reflected from an object in said space or on said floor or from said floor; and
a control unit determining the presence of an object on the basis of the amount of light received by said light-receiving unit, said control unit being adapted to supply, to a door controller which controls the opening and closing of said door panel, a door controller enabling signal for opening said door panel when the presence of an object is determined;
wherein said control unit includes a plurality of failure detecting means for detecting failure in portions of said light-emitting unit, light-receiving unit and control unit, and develops continuously said door controller enabling signal when one of said failure detecting means detects failure in any of said portions.
1 Assignment
0 Petitions
Accused Products
Abstract
A door panel is actuated when an actuator sensor disposed near the door panel senses an object approaching the door panel. When a safety sensor mounted on the door panel senses an object while the door panel is opening, the door panel is stopped. When a safety sensor mounted on the door panel senses an object while the door panel is closing, the door panel is opened. Each of the sensors includes a light-emitting unit, a light-receiving unit and a control unit, and the sensor can detect for itself failure in any of the light-emitting unit, the light-receiving unit and the control unit.
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Citations
29 Claims
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1. A door sensor with a self-diagnosing function, for sensing an object approaching a door panel and actuating the door panel in response to the sensing of the object, comprising:
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a light-emitting unit emitting light into a space or onto a floor near said door panel; a light-receiving unit receiving light emitted by said light-emitting unit and reflected from an object in said space or on said floor or from said floor; and a control unit determining the presence of an object on the basis of the amount of light received by said light-receiving unit, said control unit being adapted to supply, to a door controller which controls the opening and closing of said door panel, a door controller enabling signal for opening said door panel when the presence of an object is determined; wherein said control unit includes a plurality of failure detecting means for detecting failure in portions of said light-emitting unit, light-receiving unit and control unit, and develops continuously said door controller enabling signal when one of said failure detecting means detects failure in any of said portions. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A door sensor with a self-diagnosing function, for sensing an object in opening and closing paths of a door panel for securing the object against colliding with or being caught in the door panel, comprising:
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a light-emitting unit emitting light to the closing path or a vicinity thereof along which said door panel moves from a fully opened position thereof to a fully closed position; a light-receiving unit receiving light emitted by said light-emitting unit and reflected from an object in said closing path or the vicinity thereof or from said closing path or the vicinity thereof; and a control unit determining the presence of an object on the basis of the amount of light received by said light-receiving unit, said control unit being adapted to supply, to a door controller which controls the opening and closing of said door panel, a door controller enabling signal for opening said door panel when the presence of an object is determined; wherein said control unit includes a plurality of failure detecting means for detecting failure in portions of said light-emitting unit, light-receiving unit and control unit, and develops continuously said door controller enabling signal when one of said failure detecting means detects failure in any of said portions. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A door sensor with a self-diagnosing function, for sensing an object in opening and closing paths of a door panel for securing the object against colliding with or being caught in the door panel, comprising:
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a light-emitting unit emitting light to the opening path or a vicinity thereof along which said door panel moves from a fully closed position thereof to a fully opened position; a light-receiving unit receiving light emitted by said light-emitting unit and reflected from an object in said opening path or the vicinity thereof or from said opening path or the vicinity thereof; and a control unit determining the presence of an object on the basis of the amount of light received by said light-receiving unit, said control unit being adapted to supply, to a door controller which control the opening and closing of said door panel, a door controller enabling signal for stopping said door panel or opening said door panel at a low speed when the presence of an object is determined; wherein said control unit includes a plurality of failure detecting means for detecting failure in portions of said light-emitting unit, light-receiving unit and control unit, and develops continuously said door controller enabling signal when one of said failure detecting means detects failure in any of said portions. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A door sensor with a self-diagnosing function comprising:
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a light-emitting unit emitting light into a space or onto a floor near a door panel; a light-receiving unit receiving light emitted by said light-emitting unit and reflected from an object in said space or on said floor or from said floor; and a control unit determining the presence of an object approaching said door panel on the basis of the amount of light received by said light-receiving unit, said control unit being adapted to supply, to a door controller which controls the opening and closing of said door panel, a door controller enabling signal when the presence of an object is determined; wherein said control unit includes a plurality of failure detecting means for detecting failure in portions of said light-emitting unit, light-receiving unit and control unit; and when one of said failure detecting means detects failure in any of said portions, said control unit develops continuously said door controller enabling signal including information relating to the detected failure. - View Dependent Claims (25, 26)
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27. A door sensor with a self-diagnosing function comprising:
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a light-emitting unit emitting light into a space or onto a floor near a door panel; a light-receiving unit receiving light emitted by said light-emitting unit and reflected from an object in said space or on said floor or from said floor; a control unit determining the presence of an object approaching said door panel on the basis of the amount of light received by said light-receiving unit, said control unit being adapted to supply, to a door controller which controls the opening and closing of said door panel, a door controller enabling signal when the presence of an object is determined; and an indicator section for indicating an operating state of said door sensor; wherein said control unit includes a plurality of failure detecting means for detecting failure in portions of said light-emitting unit, light-receiving unit and control unit; and when one of said failure detecting means detects failure in any of said portions, said control unit develops continuously said door controller enabling signal and also makes said indicator section indicate information relating to the detected failure. - View Dependent Claims (28, 29)
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Specification