Electromagnetic coupling sensing device, signal measurement method, and related electronic device

A method of measuring signal applied to an electromagnetic coupling sensing device, the electromagnetic coupling sensing device comprising:

• a frequency generation module, configured to generate a frequency setting signal;
• a first resonant module, configured to generate a primary resonant signal based on the frequency setting signal;
• a second resonant module, configured to couple with the first resonant module through a coupling capacitance to generate a secondary resonant signal based on the primary resonance signal;
• wherein the second resonant module comprises a coil disposed in a Z direction, a ferrite is provided in the coil and a height of the coil is higher than the ferrite;
• the coil is capable of carrying a weight to be measured to deform such that an intrinsic frequency of the electromagnetic coupling sensing device changes;
• and
• an echo acquisition and processing module, electrically connected to the second resonant module, configured to collect the secondary resonant signal;
• wherein the method comprises:
• connecting to a power supply;
• placing an object to be measured on the coil to deform the coil;
• and
• measuring a voltage signal output by the echo acquisition and processing module, wherein the voltage signal changes according to the intrinsic frequency of the electromagnetic coupling sensing device.

An electronic device, comprising:

• an electromagnetic coupling sensing device, wherein the electromagnetic coupling sensing device comprises:
• a frequency generation module, configured to generate a frequency setting signal;
• a first resonant module, configured to generate a primary resonant signal based on the frequency setting signal;
• a second resonant module, configured to couple with the first resonant module through a coupling capacitance to generate a secondary resonant signal based on the primary resonance signal;
• wherein the second resonant module comprises a coil disposed in a Z direction, a ferrite is provided in the coil and a height of the coil is higher than the ferrite;
• the coil is capable of carrying a weight to be measured to deform such that an intrinsic frequency of the electromagnetic coupling sensing device changes;
• and
• an echo acquisition and processing module, electrically connected to the second resonant module, configured to collect the secondary resonant signal and output a voltage signal changing according to the intrinsic frequency of the electromagnetic coupling sensing device.