Abstract:
A CAPACITIVE SENSOR COMPRISES OF ELECTRODES INTERDIGITATED FINGERS (16) IN MULTIPLE INSULATING LAYERS (3, 4) FOR MEASURING MOISTURE CONTENT. THE MOST ILLUSTRATIVE DRAWING:
Abstract:
AN ENERGY HARVESTING DEVICE (100) COMPRISES A HOLLOW PRISMATIC BODY (I12) FORMED OF A PLURALITY OF FACES ARE COATED WITH A PIEZOELECTRIC LAYER THEREON, A PLURALITY OF ELONGATED CANTILEVERS (14) ARE ARRANGED SPATIALLY FROM EACH OTHER AND INSERTED THROUGH THE FACES OF THE HOLLOW PRISMATIC BODY (12), THE ELONGATED CANTILEVERS (14) ARE COATED WITH A PIEZOELECTRIC LAYER THEREON, AND AT LEAST ONE INNER RESILIENT MEANS (16) OF A PARTICULAR STIFFNESS HAVING ONE END ATTACHED THE HOLLOW PRISMATIC BODY (12) AFTER DETERMINED THE CENTRE OF GRAVITY AND MASS OF THE HOLLOW PRISMATIC BODY (12) AND THE OTHER END ATTACHED TO A BASE (18) IN ORDER TO BE STABLE ON ITS AXIS, WHEREIN THE DEVICE (100) IS CAPABLE OF DETECTING SMALL AMOUNT OF ENVIRONMENTALLY AVAILABLE VIBRATION SOURCES AND PRODUCING HUGE VIBRATION TO THE HOLLOW PRISMATIC BODY (12) AND THE CANTILEVERS (14), THEREBY INDUCING THE DEVICE (100) TO GENERATE ELECTRICAL ENERGY. THE ENERGY HARVESTING DEVICE (100) IS CAPABLE OF HARVESTING ENERGY FROM AMBIENT LOW SCALE VIBRATION. THEREFORE IT IS APPLICABLE TO ANY KIND OF ENERGY HARVESTING WHERE MECHANICAL FORCE IN NEED TO CONVERTED TO ELECTRICAL ENERGY.
Abstract:
An energy harvesting device (100) comprises a hollow prismatic body (12) formed of a plurality of faces are coated with a piezoelectric layer thereon, a plurality of elongated cantilevers (14) are arranged spatially from each other and inserted through the faces of the hollow prismatic body (12), the elongated cantilevers (14) are coated with a piezoelectric layer thereon, and at least one inner resilient means (16) of a particular stiffness having one end attached the hollow prismatic body (12) after determined the centre of gravity and mass of the hollow prismatic body (12) and the other end attached to a base (18) in order to be stable on its axis, wherein the device (100) is capable of detecting small amount of environmentally available vibration sources and producing huge vibration to the hollow prismatic body (12) and the cantilevers (14), thereby inducing the device (100) to generate electrical energy. The energy harvesting device (100) is capable of harvesting energy from ambient low scale vibration. Therefore it is applicable to any kind of energy harvesting where mechanical force in need to converted to electrical energy.
Abstract:
The present invention relates to a capacitive humidity sensor (100) comprising: a semiconductor substrate (101), an insulating layer (103) resting on the semiconductor substrate (101), a sensing membrane (105), a plurality of interdigitated electrodes (107) and a plurality of electrode contacts (109). The present invention has ground plane connections (111) and the interdigitated electrodes (107) are sandwiched by the sensing membrane (105). The ground plane connections (111) and the sandwiching sensing membrane (105) are configured to eliminate stray capacitance and to provide optimal utilisation of fringing field effect respectively.
Abstract:
An energy harvesting device (100) comprises a hollow prismatic body (12) formed of a plurality of faces are coated with a piezoelectric layer thereon, a plurality of elongated cantilevers (14) are arranged spatially from each other and inserted through the faces of the hollow prismatic body (12), the elongated cantilevers (14) are coated with a piezoelectric layer thereon, and at least one inner resilient means (16) of a particular stiffness having one end attached the hollow prismatic body (12) after determined the centre of gravity and mass of the hollow prismatic body (12) and the other end attached to a base (18) in order to be stable on its axis, wherein the device (100) is capable of detecting small amount of environmentally available vibration sources and producing huge vibration to the hollow prismatic body (12) and the cantilevers (14), thereby inducing the device (100) to generate electrical energy. The energy harvesting device (100) is capable of harvesting energy from ambient low scale vibration. Therefore it is applicable to any kind of energy harvesting where mechanical force in need to converted to electrical energy.