Method of obtaining data relating to a driver assistance system of a vehicle
First Claim
1. A method of obtaining data relating to a driver assistance system installed on a vehicle, the driver assistance system comprising a sensor for sensing external to the vehicle, the method comprising:
- capturing sensory data external to the vehicle using the sensor of the driver assistance system;
buffering a first group of vehicle signals and storing a pre-event value for a signal of the first group in a pre-event buffer;
analyzing the sensory data to detect one or more types of probability events, and after a probability event is detected;
monitoring a second group of vehicle signals for a post-event time period after the occurrence of the detected probability event, and during the post event time period, processing a signal of the second group with a predetermined function to generate a post-event signal value, andrecording data in a memory, wherein the recorded data comprises the type of detected probability event, a pre-event signal value and a post-event signal value.
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Abstract
A method of obtaining data relating to a driver assistance system installed on a vehicle, including capturing sensory data (such as images) external to the vehicle via a sensor of the driver assistance system, buffering a first group of vehicle signals and storing a pre-event value for a signal of the first group in a pre-event buffer, and analyzing the sensory data to detect one or more types of probability events. After a probability event is detected, the method includes monitoring a second group of vehicle signals for a post-event time period after the occurrence of the detected probability event, and during the post event time period processing signals of the second group with a predetermined function to generate a post-event signal value, and recording data in a memory, with the recorded data including the type of detected probability event, a pre-event signal value and a post-event signal value.
88 Citations
20 Claims
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1. A method of obtaining data relating to a driver assistance system installed on a vehicle, the driver assistance system comprising a sensor for sensing external to the vehicle, the method comprising:
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capturing sensory data external to the vehicle using the sensor of the driver assistance system; buffering a first group of vehicle signals and storing a pre-event value for a signal of the first group in a pre-event buffer; analyzing the sensory data to detect one or more types of probability events, and after a probability event is detected; monitoring a second group of vehicle signals for a post-event time period after the occurrence of the detected probability event, and during the post event time period, processing a signal of the second group with a predetermined function to generate a post-event signal value, and recording data in a memory, wherein the recorded data comprises the type of detected probability event, a pre-event signal value and a post-event signal value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for evaluating the effectiveness of a driver assistance system, the driver assistance system comprising an image sensor for sensing external to the vehicle, the method comprising:
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capturing images external to the vehicle using the image sensor of the driver assistance system; evaluating, using an image processor, the captured images and deriving image processor signals therefrom; deriving a probability event from the image processor signals; buffering, in a predetermined time interval, an image processor signal and a vehicle signal received through a vehicle data bus; storing, after the probability event has been derived, pre-event data, event data and post-event data; retrieving pre-event data, event data, and post-event data; processing the retrieved pre-event data, the retrieved event data, and the retrieved post-event data to determine if the probability event is true or false; and wherein (i) pre-event data comprises image processor signals and vehicle signals buffered before the probability event occurs, (ii) event data comprises image processor signals and vehicle signals at the time of the probability event, and (iii) post-event data comprises image processor signals and vehicle signals received at a predetermined time or within a predetermined time period after the probability event occurs. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A driver assistance system comprising:
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an image sensor; an image processor operatively connected to the image sensor for deriving image processor signals from image data captured by the image sensor; random access memory operatively connected to the image processor; non-volatile memory operatively connected to the image processor; a processor operatively connected to the image processor and to a vehicle data bus; wherein the processor at least one of (i) periodically instructs the image processor to buffer images in random access memory, (ii) instructs the image processor to buffer images in random access memory in response to an image processor signal and (iii) instructs the image processor to buffer images in random access memory in response to a signal received on the vehicle data bus; and wherein the processor instructs the image processor to copy images from the random access memory to the non-volatile memory based on a priority determination in the processor. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification