QUOTE (JeepRubicon2k3 @ Feb 5 2010, 08:14 PM)
HAHA LOL, wow, thats false![/b]
Actually it is true. There are many patents for this technology. I also found a website that explains it. This is not the only site talking about the system:
"Today some manufacturers are using a series of flexible sensors that are embedded in the back rest portion and cushion of the seat.
Using electric-field (e-field) technology an extremely low-level electric signal is sent to sensors embedded in the seat cushion and back rest. The human body conducts electricity; therefore when you set in the seat your body interrupts the flow of the currant, causing interference in the e-field.
This interference forms and image of the person as shown by the dotted line in (Fig 1-6-17), by measuring the body mass based on the size of the interference it causes, the sensor can identify a child or adult. The level of interference is directly related to the size of the body – larger people create larger interferences, smaller people less interference.By calculating which sensors are being interrupted the system can determine what position the person is setting in and any movement they make. It also can determine the height of a child or small adult by determining the highest point of interruption.
A double-layer flexible sensor assembly is installed in the seat cushion, the second layer being to calculate the weight of the person, classifying them with in the three or five categories we seen before. "