Sensing device, a method of preparing a sensing device and a personal mobile sensing system

A method for preparing a sensing device comprising:

• providing an electromagnetic wave emitter for emitting electromagnetic waves to a surface;
• providing an electromagnetic wave detector for detecting the emitted electromagnetic waves that are reflected from the surface;
• positioning a force transmitting member relative to the electromagnetic wave emitter and electromagnetic wave detector to substantially prevent electromagnetic waves emitted by the electromagnetic wave emitter from travelling directly to the wave detector,
• wherein the force transmitting member is configured to transmit a force applied thereto for detection;
• coupling a force detector to the force transmitting member for detecting the force transmitted by the force transmitting member;
• and
• coupling a feedback unit to the force detector, the feedback unit being configured to correlate the quality of the detected electromagnetic wave with the amount of force applied to the force transmitting member and provide feedback related to the correlation by:
• computing an area under waveforms of detected signals corresponding to a variety of applied pressure amounts, and
• determining an optimum pressure to correspond a largest computed area, from the variety of applied pressure amount.

A personal mobile sensing (PMS) system comprising:

• a sensing device comprising:
• an electromagnetic wave emitter for emitting electromagnetic waves to a surface;
• an electromagnetic wave detector for detecting the emitted electromagnetic waves that are reflected from the surface;
• a force transmitting member configured to transmit a force applied thereto for detection, wherein the force transmitting member is positioned relative to the electromagnetic wave emitter and electromagnetic wave detector to substantially prevent electromagnetic waves emitted by the electromagnetic wave emitter from travelling directly to the wave detector;
• a force detector coupled to the force transmitting member for detecting the force transmitted by the force transmitting member;
• and
• a personal mobile processing device for coupling to the sensing device to process a signal obtained from said sensing device, the personal mobile processing device comprising:
• a feedback unit coupled to the force detector, the feedback unit being configured to correlate the quality of the detected electromagnetic wave with the amount of force applied to the force transmitting member and provide feedback related to the correlation by:
• computing an area under waveforms of detected signals corresponding to a variety of applied pressure amounts, and
• determining an optimum pressure to correspond a largest computed area, from the variety of applied pressure amount.