Tracking and monitoring system
First Claim
1. A tracking and monitoring system comprisinga heat source tracker producing a data signal representative of a current position of said heat source in a field of view and three-dimensionally changing the attitude thereof in such a manner as to catch an image of said heat source at a predetermined position in said field of view for tracking said heat source in a monitoring zone, a plurality of infrared detecting elements included in said heat source tracker and located in four quadrants defined in said field of view by two virtual axes perpendicular to each other to receive infrared light radiated from said heat source and to produce detecting signals each representative of the amount of infrared light incident on associated one of said plural infrared detecting elements, a data processing system connected to said heat source tracker, checking said data signal to see whether or not said heat source enters a prohibited zone defined in said monitoring zone and producing an instruction for an alarm when said heat source enters said prohibited zone, wherein said data processing system automatically determines said prohibited zone in accordance with data representative of a position of an access way through which said heat source enters said monitoring zone, and an alarm unit connected to said data processing system and responsive to said instruction for giving said alarm.
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Accused Products
Abstract
A tracking and monitoring system directs an infrared sensor toward a heat source such as a human body, and three-dimensionally tracks the heat source, wherein the infrared sensor has four infrared detecting elements appropriately located with respect to a reference point in the field of view for producing respective detecting signals varied in magnitude depending upon the parts of the image of heat source incident on the four infrared detecting elements so that a wired logic circuit controls the attitude of the infrared sensor in such a manner as catch the image of the heat source at the reference point.
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Citations
21 Claims
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1. A tracking and monitoring system comprising
a heat source tracker producing a data signal representative of a current position of said heat source in a field of view and three-dimensionally changing the attitude thereof in such a manner as to catch an image of said heat source at a predetermined position in said field of view for tracking said heat source in a monitoring zone, a plurality of infrared detecting elements included in said heat source tracker and located in four quadrants defined in said field of view by two virtual axes perpendicular to each other to receive infrared light radiated from said heat source and to produce detecting signals each representative of the amount of infrared light incident on associated one of said plural infrared detecting elements, a data processing system connected to said heat source tracker, checking said data signal to see whether or not said heat source enters a prohibited zone defined in said monitoring zone and producing an instruction for an alarm when said heat source enters said prohibited zone, wherein said data processing system automatically determines said prohibited zone in accordance with data representative of a position of an access way through which said heat source enters said monitoring zone, and an alarm unit connected to said data processing system and responsive to said instruction for giving said alarm.
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17. A tracking and monitoring system comprising:
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a heat source tracker producing a data signal representative of a current position of said heat source in a field of view and three-dimensionally changing the attitude thereof in such a manner as to catch an image of said heat source at a predetermined position in said field of view for tracking said heat source in a monitoring zone, a data processing system connected to said heat source tracker, checking said data signal to see whether or not said heat source enters a prohibited zone defined in said monitoring zone and producing an instruction for an alarm when said heat source enters said prohibited zone, said data processing system determining a trajectory path of said heat source and producing an image-carrying signal representative of said heat source, and an alarm unit connected to said data processing system and responsive to said instruction for giving said alarm, wherein said heat source tracker has plural infrared detecting elements receiving infrared light radiated from said heat source and producing detecting signals each representative of the amount of infrared light incident on associated one of said plural infrared detecting elements, a wired logic circuit connected to said plural infrared detecting elements and producing driving signals representative of said current position of said heat source offset from said predetermined position, and an actuator connected to said plural infrared detecting elements and responsive to said driving signals for changing said attitude thereof, and wherein said plural infrared detecting elements are located in four quadrants defined in said field of view by two virtual axes perpendicular to each other, and said wired logic circuit compares the detecting signals supplied from the infrared detecting elements on one side of one of said virtual axes with the detecting signals supplied from the infrared detecting elements on the other side of said one of said virtual axes for producing one of said driving signals representative of an offset from said one of said virtual axes, and the detecting signals supplied from the infrared detecting elements on one side of the other of said virtual axes with the detecting signals supplied from the infrared detecting elements on the other side of said other of said virtual axes for producing the other of said driving signals representative of an offset from said other of said virtual axes. - View Dependent Claims (18, 19)
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20. A tracking and monitoring system comprising:
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a heat source tracker producing a data signal representative of a current position of said heat source in a field of view and three-dimensionally changing the attitude thereof in such a manner as to catch an image of said heat source at a predetermined position in said field of view for tracking said heat source in a monitoring zone, a data processing system connected to said heat source tracker, checking said data signal to see whether or not said heat source enters a prohibited zone defined in said monitoring zone and producing an instruction for an alarm when said heat source enters said prohibited zone, and an alarm unit connected to said data processing system and responsive to said instruction for giving said alarm, wherein said heat source tracker has plural infrared detecting elements receiving infrared light radiated from said heat source and producing detecting signals each representative of the amount of infrared light incident on associated one of said plural infrared detecting elements, a wired logic circuit connected to said plural infrared detecting elements and producing driving signals representative of said current position of said heat source offset from said predetermined position, and an actuator connected to said plural infrared detecting elements and responsive to said driving signals for changing said attitude thereof, and wherein said plural infrared detecting elements are located on four virtual lines extending from said predetermined position at intervals of 90 degrees, and said wired logic circuit compares the detecting signals supplied from the infrared detecting elements on the two virtual lines aligned with each other for producing one of said driving signals representative of an offset from the other virtual lines perpendicular to said two virtual lines, and the detecting signals supplied from the infrared detecting elements on said other virtual lines for producing the other of said driving signals representative of an offset from said two virtual lines. - View Dependent Claims (21)
a first comparator having a first input and a second input, said first input and said second input of said first comparator being amplified signals from a portion of said plural infrared detecting elements positioned on a vertical axis; and
a second comparator having a first input and a second input, said first input and said second input of said second comparator being amplified signals from another portion of said plural infrared detecting elements positioned on a horizontal axis.
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Specification