Impulse radar security system
First Claim
1. A radar security system for a residential or commercial structure, comprising:
- a) a sensor unit electrically connected to at least one antenna for generation and transmission of at least one first signal and receipt of at least one reflected second signal, said sensor unit comprises a sample-hold circuit for sampling said at least one second signal, wherein said at least one second signal comprises a plurality of reflected signals at a sequence of points in a waveform of said at least second signal and generating at least one sampled signal having a substantially identical amplitude as said at least one second signal and a lower frequency than said at least one second signal allowing for efficient data processing;
b) a control unit comprising a read-only memory (ROM) for storage of an algorithm used in conversion of said at least one sampled signal to a third signal comprising an average waveform obtained over a specified time interval, said control unit electrically connected to said sensor unit through a linking element for comparing said at least one sampled signal to said third signal and generating a fourth signal indicative of a parameter of interest upon determination of a deviation between said at least one sampled signal and said third signal; and
c) a display device electrically connected to said control unit for receiving said fourth signal and displaying said parameter of interest.
1 Assignment
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Accused Products
Abstract
The present invention provides a security system that can provide a user with data on the directional movement, velocity and location of an object within and around the perimeter of a structure with the use of radio energy. The system comprises a sensor unit having at least one antenna for transmission of a signal into a defined area of the structure. Any intrusion in the area is detected upon a change in the waveform received by the antenna. A received signal is transmitted from the sensor unit to a control unit, comprising, in part, a preprogrammed data processing unit that can determine the movement of the intruder. Utilization of a plurality of sensor units allows the user to obtain additional information on the velocity and location of the intruder. Additionally, as with conventional security systems, the system can provide an electrical signal to activate a sound and/or light device to attract the attention of the intruder and warn others of the intruder'"'"'s presence.
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Citations
16 Claims
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1. A radar security system for a residential or commercial structure, comprising:
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a) a sensor unit electrically connected to at least one antenna for generation and transmission of at least one first signal and receipt of at least one reflected second signal, said sensor unit comprises a sample-hold circuit for sampling said at least one second signal, wherein said at least one second signal comprises a plurality of reflected signals at a sequence of points in a waveform of said at least second signal and generating at least one sampled signal having a substantially identical amplitude as said at least one second signal and a lower frequency than said at least one second signal allowing for efficient data processing;
b) a control unit comprising a read-only memory (ROM) for storage of an algorithm used in conversion of said at least one sampled signal to a third signal comprising an average waveform obtained over a specified time interval, said control unit electrically connected to said sensor unit through a linking element for comparing said at least one sampled signal to said third signal and generating a fourth signal indicative of a parameter of interest upon determination of a deviation between said at least one sampled signal and said third signal; and
c) a display device electrically connected to said control unit for receiving said fourth signal and displaying said parameter of interest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of processing a signal in a radar security system having a single sensor unit, comprising:
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(a) transmitting at least one first signal from an antenna into a predefined area;
(b) receiving at least one reflected second signal at said antenna;
(c) sampling said at least one second signal, wherein said at least one second signal comprises a plurality of reflected signals at a sequence of points in a waveform of said at least one second signal for generation of at least one low frequency signal proportional to said at least one second signal with a sample-hold circuit;
(d) amplifying said at least one low frequency signal proportional to an average signal loss with a time-variable range amplifier thereby providing nominal signal levels equal over a range of interest;
(e) comparing said at least one low frequency signal to a third signal representative of an average waveform of said at least one low frequency signal over a specified time interval stored in memory in a control unit in determining if there is any deviation between said third signal and said at least one low frequency signal thereby establishing physical movement within said predefined area and generating a fourth signal; and
(f) transmitting said fourth signal from said control unit to a display device to display a parameter of interest of (i) directional movement of an object;
(ii) velocity of said object; and
(iii) position of said object.
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16. A method of processing a signal in a radar security system having multiple sensor units, comprising:
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(a) defining an area to be monitored by the radar security system;
(b) identifying the location of each of the sensor units and storing the location into a memory of a control unit;
(c) transmitting at least one first signal from at least one antenna into a predefined area;
(d) receiving at least one reflected second signal at said at least one antenna;
(e) sampling said at least one second signal, wherein said at least one second signal comprises a plurality of reflected signals at a sequence of points in a waveform of said at least one second signal for generation of at least one low frequency signal proportional to said at least one second signal with a sample-hold circuit;
(f) amplifying said at least one low frequency signal proportional to the average signal loss with a time-variable range amplifier thereby providing nominal signal levels equal over a range of interest;
(g) comparing said at least one low frequency signal to a third signal representative of an average waveform of said at least one low frequency signal over a specified period of time stored in memory in a control unit in determining if there is any deviation between said third signal and said at least one low frequency signal thereby establishing physical movement within said predefined area and generating a fourth signal;
(h) tracking and identifying said at least one second signal; and
(i) transmitting said fourth signal from said control unit to a display device to display a parameter of interest of (i) directional movement of an object;
(ii) velocity of said object; and
(iii) position of said object.
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Specification