Browse Publications Technical Papers 2020-01-1209

Development of electrostatic capacity type steering sensor using conductive leather 2020-01-1209

According to the National Automotive Sampling System Crashworthiness Data System (NASS/CDS) implemented by the US Department of Transportation, there were 10,743 accidents in 2016 that involved departure from the road, and among those accidents there were 12,043 fatalities. Lane departure prevention systems are expected to make a significant contribution to reducing accidents of this kind. Progress is also being made in the development of systems that further advance automation to enable autonomous driving. However, the evolution of these kinds of advanced safety systems is also raising concerns about the possibility that when systems are providing driving assistance, drivers may take their hands off the steering wheel and stop paying attention because they place too much trust in the safety systems. In addition, the occurrence of a malfunction in any part of the safety systems will mean that the responsibility for vehicle operation has to be returned to the driver immediately, but it is possible that the driver will not be able to respond adequately. Sensors that detect steering operations by the driver are therefore taking on growing importance. We have pursued development of a steering wheel that uses conductive coating for application in Advanced Driving Assist Systems, which will continue to evolve in the future. The purpose of the developed conductive coating steering system is to heighten the functionality of driver state identification in the environment of high-level ADAS usage within the range of ordinary operation. A high-level ADAS uses a conductive coating and has added functions that detect the driver's pulse rate and whether the driver is gripping the steering wheel. This can enhance comfort within the range of ordinary operation by increasing the hardness of the steering wheel by 20% and increasing the heating performance of the steering wheel heater by 10%.


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