Sensing apparatus and material sensing method

A sensing apparatus sensing a varying status of a permittivity of a material, the sensing apparatus comprising:

• a probe;
• and
• a sensing module connected to the probe,
• wherein the sensing module comprises:
• a material sensing circuit;
• an operation unit electrically connected to the material sensing circuit;
• and
• a signal output circuit electrically connected to the operation unit,
• wherein the sensing module generates a frequency sweep signal and sends the frequency sweep signal to the probe to sense a status of the material;
• the frequency sweep signal is a plurality of signals having different frequencies from each other in a predetermined frequency range;
• when the frequency sweep signal touches the material, an equivalent capacitance of the material is utilized to generate a reflected signal;
• the material sensing circuit receives the reflected signal and sends the reflected signal to the operation unit;
• the operation unit operates the reflected signal to generate a waveform signal to determine the status of the material;
• wherein the operation unit utilizes an impedance spectrum to determine the status of the material;
• the impedance spectrum defines a plurality of status areas;
• each of the status areas comprises different an output signal respectively;
• the operation unit applies a signal intensity and a distribution frequency of the waveform signal to the impedance spectrum to determine a location of the waveform signal in the status areas, and performs a conversion accordingly to obtain a material equivalent volume and a material quality of the material and determines the status of the material;
• according to the location of the waveform signal in the status areas, the operation unit utilizes the signal output circuit to outwardly output the output signal of the status area for the location.