Thermal-image proximity gesture recognition module, device having thermal-image proximity gesture recognition function, and thermal-image proximity gesture recognition

A thermal-image proximity gesture recognition method, applied to use a thermal-image proximity gesture recognition module to detect a motion of an object and output a gesture command, wherein the thermal-image proximity gesture recognition module is disposed on a device having a non-lens infrared window, the thermal-image proximity gesture recognition module comprises a thermal sensor array, and the thermal-image proximity gesture recognition method comprises:

• capturing a thermal image array of a frame, and obtaining a digital thermally induced voltage array corresponding to the frame;
• determining whether the digital thermally induced voltage array has a thermal object block matching a hand feature;
• and
• when the digital thermally induced voltage array has a thermal object block matching a hand feature, generating a gesture command based on a change of the thermal object block in the frames, and transmitting the gesture command to a main microcontroller of the device.

A device having a thermal-image proximity gesture recognition function, comprising:

• an outer shell;
• a non-lens infrared window, disposed on the outer shell;
• a main microcontroller;
• and
• a thermal-image proximity gesture recognition module, comprising:
• a thermal sensor array, facing the non-lens infrared window and formed by at least 64 thermal sensor units arranged in 8 rows and 8 columns, wherein the at least 64 thermal sensor units are configured to sense infrared irradiated from an object which is 5˜35 cm distant from the non-lens infrared window, and generate a thermal image array and output a thermally induced voltage array;
• an analog-to-digital converter, connected to the thermal sensor array, and configured to receive the thermally induced voltage array and convert the thermally inducted voltage array into a digital thermally inducted voltage array;
• and
• a microcontroller, connected to the thermal sensor array and the analog-to-digital converter, and configured to control the thermal sensor array and the analog-to-digital converter to perform thermal image sensing and signal conversion for the object, receive the digital thermally induced voltage arrays of frames in a detection sequence, and determine whether there is a thermal object block matching a hand feature presents, wherein when the thermal object block matching the hand feature is determined, the microcontroller generates a gesture command based on a change of the thermal object block in at least two of the frames and transmits the gesture command to the main microcontroller.