Electromagnetic sensor system
First Claim
1. A electromagnetic sensor system comprising transmitting means for transmitting a radio frequency signal, receiving means for receiving reflections of said signal from remote objects, sampling means operable to sample the received reflected signal or a signal processing the sampled signal, and operable to detect said reflections in the sampled signal, and to determine information on the presence, position and/or range of said object, and filter means for preventing radio signals transmitted by other sources or noise spikes from causing interference which results in spurious detections or indications of range by the processing means, wherein the filter means has a threshold detector for preventing operation of the sampling means when a characteristic of the received reflected signal exceeds a threshold.
2 Assignments
0 Petitions
Accused Products
Abstract
A vehicle (160) such as a motor road vehicle is fitted with an electromagnetic sensor system comprising transmitting means (e.g. 4, 1) for transmitting a radio frequency signal, receiving means (e.g. 2, 6) for receiving reflections of said signal from remote objects, sampling means (20, 28) operable to sample the received reflected signal (or a signal derived therefrom), and processing means (e.g. 36) for processing the sampled signal, and operable to detect said reflections in the sampled signal, and to determine information on the presence, position and/or range of said object. The system includes filter means (e.g. 34) for preventing radio signals transmitted by other sources or noise spikes from causing interference which results in spurious detections or indications of range by the processing means.
-
Citations
8 Claims
- 1. A electromagnetic sensor system comprising transmitting means for transmitting a radio frequency signal, receiving means for receiving reflections of said signal from remote objects, sampling means operable to sample the received reflected signal or a signal processing the sampled signal, and operable to detect said reflections in the sampled signal, and to determine information on the presence, position and/or range of said object, and filter means for preventing radio signals transmitted by other sources or noise spikes from causing interference which results in spurious detections or indications of range by the processing means, wherein the filter means has a threshold detector for preventing operation of the sampling means when a characteristic of the received reflected signal exceeds a threshold.
-
8. A electromagnetic sensor system comprising transmitting means for transmitting a radio frequency signal, receiving means for receiving reflections of said signal from remote objects, sampling means operable to sample the received reflected signal processing means for processing the sampled signal, and operable to detect said reflections in the sampled signal, and to determine information on the presence, position and/or range of said object, and filter means for preventing radio signals transmitted by other sources or noise spikes from causing interference which results in spurious detections and indications of range by the processing means, wherein the filter means has a threshold detector for inhibiting operation of the sampling means when a characteristic of the received reflected signal for inhibiting exceeds a threshold.
Specification