Traffic monitoring based on non-imaging detection
First Claim
Patent Images
1. A traffic monitor, comprising:
- a non-imaging, single radiation detector;
a mask comprising a non-periodic arrangement of mask features including multiple radiation-transparent mask features; and
a focusing element configured to focus radiation emanating from objects moving in a traffic pattern and affected by each of the multiple radiation-transparent mask features onto the non-imaging, single pixel radiation detector, wherein the non-imaging, single pixel radiation detector is configured to sense the radiation and to generate a time varying output signal based on sensed radiation.
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Abstract
Traffic monitors based on non-imaging radiation detectors are described. A traffic monitor includes a non-imaging radiation detector that senses spatially patterned radiation emanating from objects moving in a traffic pattern. The detector generates a time varying output signal based on the sensed radiation. Signal processing circuitry is used to analyze the time varying output signal using time domain analysis to provide the traffic information.
8 Citations
24 Claims
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1. A traffic monitor, comprising:
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a non-imaging, single radiation detector; a mask comprising a non-periodic arrangement of mask features including multiple radiation-transparent mask features; and a focusing element configured to focus radiation emanating from objects moving in a traffic pattern and affected by each of the multiple radiation-transparent mask features onto the non-imaging, single pixel radiation detector, wherein the non-imaging, single pixel radiation detector is configured to sense the radiation and to generate a time varying output signal based on sensed radiation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A traffic monitor, comprising:
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a non-imaging, single radiation detector; a mask comprising arrangement of mask features including multiple radiation-transparent mask features; a focusing element configured to focus radiation emanating from objects moving in a traffic pattern and affected by each of the multiple radiation-transparent mask features onto the single pixel non-imaging radiation detector, the non-imaging, single radiation detector configured to sense the radiation and to generate a time varying output signal based on sensed radiation; and signal processing circuitry configured to analyze the time varying output signal by time domain analysis to provide traffic information. - View Dependent Claims (14, 15, 16)
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17. A traffic monitor, comprising:
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a non-imaging, single pixel radiation detector; a mask comprising a multi-dimensional array of multiple radiation-transparent mask features; and a focusing element configured to focus radiation emanating from objects moving in a traffic pattern and affected by each of the multiple radiation-transparent mask features onto the non-imaging single pixel radiation detector, wherein the non-imaging, single pixel radiation detector is configured to sense the radiation and to generate a time varying output signal based on sensed radiation. - View Dependent Claims (18)
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19. A method of monitoring traffic, comprising:
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sensing spatially patterned radiation emanating from a traffic object moving in a traffic pattern using a non-imaging, single pixel detector; generating a time varying output signal based on the spatially patterned radiation; analyzing the time-varying output signal using time domain analysis; and providing traffic information based on the time domain analysis of the time-varying output signal, wherein the spatially patterned radiation includes multiple higher intensity regions and multiple lower intensity regions. - View Dependent Claims (20, 21)
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22. A traffic monitor, comprising:
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a radiation source configured to emit spatially patterned radiation including multiple higher intensity regions and multiple lower intensity regions toward moving traffic objects, the spatially patterned radiation being reflected by the moving traffic objects; a non-imaging, single pixel radiation detector configured to sense the spatially patterned radiation which is reflected by the moving traffic objects and to generate a time varying output signal based on the reflected radiation; and signal processing circuitry configured to analyze the time varying output signal to provide traffic information.
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23. A traffic monitor, comprising:
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a non-imaging, single pixel radiation detector configured to sense spatially patterned radiation emanating from an object moving in a traffic pattern and to generate a time varying output signal based on the sensed radiation; and signal processing circuitry configured to analyze the time varying output signal using time domain analysis to provide traffic information, wherein the spatially patterned radiation includes multiple higher intensity regions and multiple lower intensity regions. - View Dependent Claims (24)
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Specification