Method of automatically adjusting determination voltage and voltage adjusting device thereof

1. A method of automatically adjusting a determination voltage used in an induction type power supply system, comprising:

detecting an output voltage of a signal analysis circuit;

adding a first threshold value to the output voltage to generate a first determination voltage and subtracting a second threshold value from the output voltage to generate a second determination voltage;

outputting the first determination voltage as a reference voltage; and

comparing a trigger signal of the signal analysis circuit and the reference voltage, in order to generate a first data code;

wherein when the step of comparing the trigger signal of the signal analysis circuit and the reference voltage in order to generate the first data code fails, the method further comprises:

outputting the second determination voltage instead of the first determination voltage as the reference voltage, and comparing the trigger signal of the signal analysis circuit and the reference voltage, in order to generate a second data code.

2. The method of claim 1 , further comprising detecting a maximum value of the trigger signal of the signal analysis circuit, in order to obtain strength of the trigger signal.

3. The method of claim 1 , wherein the step of detecting the output voltage of the signal analysis circuit is performed during a period that a power receiving device of the induction type power supply system is not transmitting signals.

4. The method of claim 1 , wherein the signal analysis circuit clamps an input signal of the signal analysis circuit to a higher voltage level, in order to increase strength of the trigger signal, which in turn increases a possibility of successfully generating the first data code.

5. A determination voltage adjustment device used in an induction type power supply system, comprising:

a detector, for detecting an output voltage of a signal analysis circuit;

an adjustment microprocessor, electrically connected to the detector, for adding a first threshold value to the output voltage to generate a first determination voltage and subtracting a second threshold value from the output voltage to generate a second determination voltage;

an output device, electrically connected to the adjustment microprocessor, for outputting the first determination voltage as a reference voltage; and

a comparator, having two input terminals electrically connected to the detector and the output device respectively and an output terminal electrically connected to the adjustment microprocessor, for comparing a trigger signal of the signal analysis circuit and the reference voltage, in order to generate a first data code;

wherein when the comparator fails to generate the first data code by comparing the trigger signal of the signal analysis circuit and the reference voltage, the output device outputs the second determination voltage instead of the first determination voltage as the reference voltage, and the comparator compares the trigger signal of the signal analysis circuit and the reference voltage, in order to generate a second data code.

6. The determination voltage adjustment device of claim 5 , wherein the detector further detects a maximum value of the trigger signal of the signal analysis circuit, in order to obtain strength of the trigger signal.

7. The determination voltage adjustment device of claim 5 , wherein the detector detects the output voltage of the signal analysis circuit during a period that a power receiving device of the induction type power supply system is not transmitting signals.

8. The determination voltage adjustment device of claim 5 , wherein the signal analysis circuit comprises a clamping circuit, for clamping an input signal of the signal analysis circuit to a higher voltage level, in order to increase strength of the trigger signal, which in turn increases a possibility of successfully generating the first data code.

9. The determination voltage adjustment device of claim 5 , wherein the detector comprises an analog-to-digital converter for converting the trigger signal into a signal in digital form, in order to be outputted to the adjustment microprocessor for follow-up interpretation and processing.

10. The determination voltage adjustment device of claim 5 , wherein the output device comprises a digital-to-analog converter for converting the first determination voltage or the second determination voltage outputted by the adjustment microprocessor into the reference voltage in analog form, in order to be outputted to the comparator for follow-up interpretation and processing.