SECURITY SYSTEM USING LADAR-BASED SENSORS
First Claim
1. A security sensor system, comprising:
- one or more laser detection and ranging (LADAR) sensors configured for accumulation of three-dimensional image data, the one or more LADAR sensors each comprising;
a LADAR device configured to transmit a plurality of laser pulses;
a microprocessor operatively coupled to the LADAR device;
one or more data storage devices operatively coupled to the microprocessor and configured to store the three-dimensional image data, and predetermined protected area boundary and fixed object definitions; and
a Global Positioning System (GPS) receiver operatively coupled to the microprocessor and a GPS antenna;
wherein the microprocessor is configured to perform a LADAR image analysis that compares the three-dimensional image data with the protected area boundary and fixed object definitions to identify one or more potential intruders.
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Accused Products
Abstract
A security sensor system comprises one or more laser detection and ranging (LADAR) sensors configured for accumulation of three-dimensional image data. In one embodiment, the one or more LADAR sensors each comprise a LADAR device, such as a MEMS device, configured to transmit a plurality of laser pulses, and a microprocessor operatively coupled to the LADAR device. One or more data storage devices is operatively coupled to the microprocessor and configured to store the three-dimensional image data, as well as predetermined protected area boundary and fixed object definitions. A GPS receiver can be operatively coupled to the microprocessor and a GPS antenna. The microprocessor is configured to perform a LADAR image analysis that compares the three-dimensional image data with the protected area boundary and fixed object definitions to identify one or more potential intruders.
35 Citations
20 Claims
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1. A security sensor system, comprising:
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one or more laser detection and ranging (LADAR) sensors configured for accumulation of three-dimensional image data, the one or more LADAR sensors each comprising; a LADAR device configured to transmit a plurality of laser pulses; a microprocessor operatively coupled to the LADAR device; one or more data storage devices operatively coupled to the microprocessor and configured to store the three-dimensional image data, and predetermined protected area boundary and fixed object definitions; and a Global Positioning System (GPS) receiver operatively coupled to the microprocessor and a GPS antenna; wherein the microprocessor is configured to perform a LADAR image analysis that compares the three-dimensional image data with the protected area boundary and fixed object definitions to identify one or more potential intruders. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A security sensor, comprising:
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at least one laser detection and ranging (LADAR) device configured for accumulation of three-dimensional image data by transmitting a plurality of laser pulses; a data processor in operative communication with the LADAR device and comprising; a plurality of quantizers configured to each respectively receive elevation values, azimuth values, or range values, based on a laser pulse transmission direction, and generate discrete coordinate values for the LADAR device; an address converter configured to convert the discrete coordinate values from the quantizers into single address values; a processing element selector configured to receive the single address values from the address converter, and to receive returned signal strength values from the LADAR device; and a plurality of processing elements each corresponding to a discrete address value and in operative communication with the processing element selector; wherein the processing element selector is configured to direct a returned signal strength value to a selected one of the plurality of processing elements such that the selected processing element is associated with a volume of space represented by the discrete coordinate values. - View Dependent Claims (10, 11)
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12. A security system, comprising:
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a plurality of security sensors positioned in a secured area, the security sensors comprising; a plurality of laser detection and ranging (LADAR) devices configured to scan portions of the secured area and to each generate a set of LADAR coordinates comprising an elevation value, an azimuth value, and a range value that are based on a laser pulse transmission direction; a three-dimensional coordinate transform component for each of the LADAR devices, configured to receive the set of LADAR coordinates from the LADAR device, and convert the LADAR coordinates into a set of earth-based coordinates; a plurality of quantizers configured to receive the earth-based coordinates from the three-dimensional coordinate transform component, and generate a set of quantized coordinates; a plurality of address converters each of which is configured to receive the quantized coordinates from the quantizers associated with one of the LADAR devices and to convert the quantized coordinates into a single address value; and a plurality of processing element selectors each of which is configured to receive the single address value from the address converter and a returned signal strength value from one of the LADAR devices; wherein the processing element selectors in each of the sensors are configured to direct a returned signal strength value from a respective LADAR device to one of a plurality of processing elements based on the single address value, such that a selected processing element is associated with a volume of space represented by the quantized coordinates of the respective LADAR device. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification