Power generated by a vibration power generator using an electret is efficiently supplied to a power supply load. A vibration power generator includes a first substrate and a second substrate configured to be moved relative to each other by external vibration while remaining opposite each other, a group of a plurality of electrets arranged in the relative movement direction on one surface side of the first substrate, and a group of a plurality of electrodes arranged in the relative movement direction on a surface side of the second substrate opposite to the group of electrets, the group of electrodes including first current collecting electrodes and second current collecting electrodes electrically connected to respective power supply loads to which power generated by the external vibration is supplied, and ground electrodes each provided between the first current collecting electrode and the second current collecting electrode and grounded.

Power generated by a vibration power generator using an electret is efficiently supplied to a power supply load. A vibration power generator includes a first substrate and a second substrate configured to be moved relative to each other by external vibration while remaining opposite each other, a group of a plurality of electrets arranged in the relative movement direction on one surface side of the first substrate, and a group of a plurality of electrodes arranged in the relative movement direction on a surface side of the second substrate opposite to the group of electrets, the group of electrodes including first current collecting electrodes and second current collecting electrodes electrically connected to respective power supply loads to which power generated by the external vibration is supplied, and ground electrodes each provided between the first current collecting electrode and the second current collecting electrode and grounded.

An energy harvester for converting vibration energy into electrical energy and harvesting the electrical energy includes: a base; a clamping structure which is supported by the base and is spaced apart from the base; an elastic member which is disposed between the base and the clamping structure and allows the clamping structure to be elastically moved relative to the base; and a cantilever structure including a cantilever beam having one side fixed to the clamping structure and the other side which is elastically bendable, and a mass body disposed on the cantilever beam.

An energy harvester for converting vibration energy into electrical energy and harvesting the electrical energy includes: a base; a clamping structure which is supported by the base and is spaced apart from the base; an elastic member which is disposed between the base and the clamping structure and allows the clamping structure to be elastically moved relative to the base; and a cantilever structure including a cantilever beam having one side fixed to the clamping structure and the other side which is elastically bendable, and a mass body disposed on the cantilever beam.

A self-powered sensor to produce an output signal corresponding to physiologic change and methods of use.

A self-powered sensor to produce an output signal corresponding to physiologic change and methods of use.

A vibration power generator configured to generate power by displacement between an electret group having a plurality of electrets and an electrode group having a plurality of electrodes in a relative movement direction in response to an external vibration, includes a casing in which the electret group and the electrode group are disposed, a fixed member in which one of the electret group and the electrode group is disposed, the fixed member being fixed to a side of the casing, and a movable member in which the other of the electret group and the electrode group is disposed. The movable member is disposed in the casing such that the movable member is relatively movable in response to the external vibration while opposed to the fixed member.

A vibration power generator configured to generate power by displacement between an electret group having a plurality of electrets and an electrode group having a plurality of electrodes in a relative movement direction in response to an external vibration, includes a casing in which the electret group and the electrode group are disposed, a fixed member in which one of the electret group and the electrode group is disposed, the fixed member being fixed to a side of the casing, and a movable member in which the other of the electret group and the electrode group is disposed. The movable member is disposed in the casing such that the movable member is relatively movable in response to the external vibration while opposed to the fixed member.

A vibration power generator in which an electret group including a plurality of electrets and an electrode group including a plurality of electrodes are displaced in a relative movement direction by an external vibration, and vibration power generation is thereby performed, has a housing portion that accommodates the electret group and the electrode group, a fixed member that is fixed to a bottom surface side of the housing portion and has one of the electret group and the electrode group as a fixed member-side power generation element, a movable member that is accommodated in the housing portion so as to be capable of relative movement by the external vibration while opposing the fixed member, and has the other of the electret group and the electrode group as a movable member-side power generation element, and a plurality of support members.

A vibration power generator in which an electret group including a plurality of electrets and an electrode group including a plurality of electrodes are displaced in a relative movement direction by an external vibration, and vibration power generation is thereby performed, has a housing portion that accommodates the electret group and the electrode group, a fixed member that is fixed to a bottom surface side of the housing portion and has one of the electret group and the electrode group as a fixed member-side power generation element, a movable member that is accommodated in the housing portion so as to be capable of relative movement by the external vibration while opposing the fixed member, and has the other of the electret group and the electrode group as a movable member-side power generation element, and a plurality of support members.