Non-invasive detecting apparatus for fruits or vegetables, and ranking method thereof

1. A ranking method of a non-invasive detecting apparatus for fruits or vegetables, comprising:

heating the fruits or the vegetables through a predetermined time period;

sensing a temperature variation level of the fruits or the vegetables after heating the fruits or the vegetables; and

ranking sweetness of the fruits or the vegetables, according to the temperature variation level, wherein the sweetness of the fruits or the vegetables is ranked according to the measured temperature variation level.

2. A non-invasive detecting apparatus for fruits or vegetables used for the ranking method of claim 1 , comprising:

a heater, configured to operably heat the fruits or the vegetables;

a temperature sensor, configured to operably sense the temperature variation level of the fruits or the vegetables, after heating the fruits or the vegetables by the heater;

a processor, electrically coupled to the heater and the temperature sensor;

a power supply, electrically coupled to the processor for supplying a power to the processor; and

a user control unit, electrically coupled to the processor, for turning on, turning off, or setting the heater.

3. The non-invasive detecting apparatus for fruits or vegetables of claim 2 , further comprising a display unit, which is electrically coupled to the processor for displaying the temperature variation level of the fruits or the vegetables.

4. The non-invasive detecting apparatus for fruits or vegetables of claim 2 , further comprising a communication unit, which is electrically coupled to the processor, for receiving a signal from a remote device, or transmitting another signal to the remote device.

5. The non-invasive detecting apparatus for fruits or vegetables of claim 2 , wherein the fruits or the vegetables are heated by leaning the heater on a surface of the fruits or the vegetables, and a leaning surface of the heater on the fruits or the vegetables includes a first dent-shaped surface corresponding to the fruits or the vegetables; or a leaning surface of the temperature sensor on the fruits or the vegetables includes a second dent-shaped surface corresponding to the fruits or the vegetables.

6. The non-invasive detecting apparatus for fruits or vegetables of claim 2 , wherein the heater is a gentle heater, which includes: a thermal resistor controlled heater, an air heater or an infrared heater, or a hot water soaking unit, for heating a part of or all over the fruits or the vegetables; wherein a temperature increase range by the gentle heater is between 5 and 20 degrees Celsius.

7. The non-invasive detecting apparatus for fruits or vegetables of claim 2 , wherein the temperature sensor is an infrared thermographer.

8. The ranking method of claim 1 , further comprising: before heating the fruits or the vegetables, obtaining a weight of each of the fruits or the vegetables, and sorting the fruits or the vegetables according to the obtained weight.

9. The ranking method of claim 1 , wherein the aforementioned step of heating the fruits or the vegetables, is a step of gently heating the fruits or the vegetables, which includes: heating a local region on the fruits or the vegetables, under control of a thermal resistor; heating a local region on the fruits or the vegetables, or heating all over the fruits or the vegetables, by warming air or infrared; or heating the fruits or the vegetables by soaking all over the fruits or the vegetables in hot water; wherein a temperature increase range in the gently heating step is between 5 and 20 degrees Celsius.

10. The ranking method of claim 1 , wherein the aforementioned step of sensing the temperature variation level of the fruits or the vegetables after heating the fruits or the vegetables, includes: sensing a temperature variation of the fruits or the vegetables by an infrared thermographer, with mapping from the sensed temperature into corresponding infrared thermographic color.

11. The ranking method of a non-invasive detecting apparatus for fruits or vegetables, comprising:

heating the fruits or the vegetables through a predetermined time period;

sensing a temperature variation level of the fruits or the vegetables after heating the fruits or the vegetables; and

ranking sweetness of the fruits or the vegetables, according to the temperature variation level, wherein the sweetness of the fruits or the vegetables is ranked according to the measured temperature variation level,

wherein the aforementioned step of ranking the sweetness of the fruits or the vegetables according to the temperature variation level, further includes: the fruits or the vegetables are ranked according to: a first grade, corresponding to a lowest temperature variation level for representing a highest sweetness; a second grade, corresponding to a temperature variation level higher than the first grade, for representing a second highest sweetness; a third grade, corresponding to a temperature variation level higher than the second grade, for representing a third highest sweetness; and a fourth grade, corresponding to a highest temperature variation level (higher than the third grade), for representing a lowest sweetness.