Patent ID: 11933084
Assignee: VITESCO TECHNOLOGIES GMBH
Field: Civil engineering (Other fields)
Classification: CPC E  H | IPC E  H

Claim 0:
1. A presence detection sensor for unlocking an opening panel of a motor vehicle, said sensor comprising:
a microcontroller comprising an analog-digital converter, a first input-output port, a second input-output port forming a voltage reference of said analog-digital converter, a third input-output port for supplying the microcontroller with voltage, a fourth input-output port and a fifth input-output port, called “connection ports”;
a capacitive voltage divider connected between said fourth input-output port and said fifth input-output port and comprising at least one detection capacitor and at least one storage capacitor;
a resistive module connected between the first input-output port and the second input-output port of the microcontroller; and
a capacitive module connected between the second input-output port of the microcontroller and a ground, and the microcontroller is configured to internally connect the first input-output port and the third input-output port during a predetermined charging duration of the capacitive module in order to dynamically establish the reference voltage of the analog-digital converter.