Method and apparatus for steering wheel touch detection

An apparatus for steering wheel touch detection,

• wherein the steering wheel is partitioned into at least one touch detection region, wherein each touch detection region comprises at least one touch detection sensor,
• the apparatus comprising:
• multiple touch detection channels,
• wherein for each touch detection channel there is a corresponding touch detection sensor, and
• wherein each touch detection channel is configured for measuring a capacitance value and resistance value of the corresponding touch detection sensor;
• and
• at least one reference load,
• wherein for each touch detection channel there is a corresponding reference load,
• wherein the reference load is configured with a preset reference capacitance value and reference resistance value, and
• wherein each touch detection channel is further used for measuring a capacitance value and resistance value of the corresponding reference load;
• and
• a processor unit configured to determine whether the operation of the touch detection channel is normal for each touch detection channel,
• wherein the operation of the touch detection channel is determined based on the preset reference capacitance value and reference resistance value of the reference load, and the measured capacitance value and resistance value of the reference load, and
• perform touch detection of the steering wheel on the basis of the measured capacitance value and resistance value of the touch detection sensor if the operation of the touch detection channel is determined to be normal,
• wherein the touch detection channel is an IQ modulation-demodulation touch detection channel.