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Radar sensing of vehicle occupancy

Active Publication Date: 2017-08-18
IEE INT ELECTRONICS & ENG SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Radar based in-vehicle systems are not established in the market due to high cost

Method used

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  • Radar sensing of vehicle occupancy

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Experimental program
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Embodiment Construction

[0030] Radar sensing in complex environments such as the interior of a car cockpit is very challenging and the algorithms are very different from those used for exterior radar sensing.

[0031] The advantage of a radar system is that, as opposed to a passive camera system, a radar system also operates at night because it actively illuminates the scene. Active camera systems require illumination in the spectrum visible to the human eye (compared to the shadows of infrared cameras). Radar systems operate in the microwave range, which is completely invisible to the human eye. In addition, it penetrates into materials and can be transmitted through. So integration behind plastic covers and textiles is also possible, although camera-based systems require openings to view.

[0032] In one embodiment, the radar detection system has a nearly fixed and constant antenna lobe over the entire frequency range from 24.00 GHz up to 24.25 GHz; however, the invention is not limited to this f...

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PUM

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Abstract

A method for sensing occupancy status within an automotive vehicle uses a radar sensor system comprising an antenna system, at least one sensor and processing circuitry. The method comprises illuminating, using the antenna system, at least one occupiable position within the vehicle with an outgoing radar signal; receiving, using at least one sensor, at least one sensor signal reflected as a result of the outgoing radar signal, obtaining accelerometer data value from at least one accelerometer, said accelerometer data containing information regarding vibration or motion of said automotive vehicle and supplying said accelerometer data to said processing circuitry; operating the processing circuitry for generating, based on the at least one sensor signal and on the accelerometer data, one or more occupancy status signals, the occupancy status signal indicating a property related to said at least one occupiable position.

Description

[0001] Field technology [0002] The present invention relates generally to the technical field of sensing objects within a vehicle, and more particularly to radar sensing for detecting occupants in a vehicle. Background technique [0003] The prior art systems for occupant classification and detection are foil based systems integrated in each single seat (involving high integration costs). It is also known to provide contactless sensing of (eg a person) within a vehicle, eg for occupancy detection (OD), occupancy classification (OC) or seat belt reminder (SBR) functionality. Radar based in-vehicle systems are not established in the market due to high cost. Typically, individual radar sensors are required for each single seat. [0004] Radar technology offers several advantages over other occupancy detection and classification methods. It is a contactless and invisible measuring system that can be easily integrated behind plastic covers and textiles. Radar systems can meas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/88G01S13/86G01S13/04G01S7/40G01S7/41
CPCG01S7/40G01S7/415G01S13/04G01S13/86G01S13/88B60R21/01534G01S13/931B60R21/01512B60R2021/01286
Inventor G·卡伦扎J·兰德韦尔
Owner IEE INT ELECTRONICS & ENG SA