POWER-GENERATING VIBRATION SENSOR, AND TIRE AND ELECTRICAL DEVICE USING THE SAME

• US 20150280616A1
• Filed: 06/11/2015
• Published: 10/01/2015
• Est. Priority Date: 05/17/2013
• Status: Abandoned Application

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: NAITO, YASUYUKI, ONISHI, KEIJI
• Application Number:
  US14/736,602
• Publication Number:
  US 20150280616A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60C 23/064 comprising tyre mounted deformation sensors, e.g. to determine road contact area
• CPC Class Codes: B60T 2240/04 Tire deformation
• CPC Class Codes: B60T 8/1725 Using tyre sensors, e.g. Sidewall Torsion sensors [SWT] for tyre pressure and temperature detection B60C23/00
• CPC Class Codes: G01H 1/003 of rotating machines G01H1/10 takes precedence
• CPC Class Codes: G01H 11/06 by electric means
• CPC Class Codes: G01H 11/08 using piezoelectric devices
• CPC Class Codes: G01P 15/0922 of the bending or flexing mode type
• CPC Class Codes: G01P 2015/0814 for translational movement of the mass, e.g. shuttle type
• CPC Class Codes: G01P 2015/0828 the mass being of the paddle type being suspended at one of its longitudinal ends
• CPC Class Codes: H02N 1/08 with conductive charge carrier, i.e. capacitor machines
• CPC Class Codes: H02N 1/10 with non-conductive charge carrier
• CPC Class Codes: H02N 2/186 Vibration harvesters
• CPC Class Codes: H02N 2/188 adapted for resonant operation
• CPC Class Codes: H10N 30/306 Cantilevers

Abstract

A power-generating vibration sensor according to the present disclosure includes a power generation device that converts vibration into power and outputs vibration information, a first power system that extracts the output vibration information, and a second power system that is connected to the power generation device and supplies the power to a transmitter for transmitting the vibration information extracted by the first power system.

Claims

1. A power-generating vibration sensor comprising:

a power generation device that converts vibration into power and outputs vibration information;

a first power system that extracts the output vibration information; and

a second power system that is connected to the power generation device and supplies the power to a transmitter for transmitting the vibration information extracted by the first power system.

2. The power-generating vibration sensor according to claim 1,

wherein the power generation device comprises two or more power generation devices, and the first power system is connected to at least one of the two or more power generation devices, and

wherein the second power system is connected to at least one of remaining power generation devices of the two or more power generation devices.

3. The power-generating vibration sensor according to claim 1,

wherein the first power system and the second power system are connected to the same power generation device.

4. The power-generating vibration sensor according to claim 1,

wherein the power generation device includes:

a fixed substrate;

a movable substrate that has one main surface facing one main surface of the fixed substrate and can vibrate in a direction substantially parallel to the fixed substrate;

a plurality of electrets that are arranged, on one of the one main surface of the fixed substrate and the one main surface of the movable substrate, in parallel to a vibration direction of the movable substrate; and

first electrodes and second electrodes that are arranged, on the other of the one main surface of the fixed substrate and the one main surface of the movable substrate, in parallel to the vibration direction and in an alternating manner, and that are connected to either the first power system or the second power system.

5. The power-generating vibration sensor according to claim 1,

wherein the power generation device includes:

an elastic structure that can bend periodically and repeatedly;

a fixed substrate that is connected to one end of the elastic structure;

a movable substrate that is connected to another end of the elastic structure; and

a first stacked structure and a second stacked structure that are provided on the elastic structure and connected to either the first power system or the second power system,

wherein the first stacked structure has a first lower electrode, a first piezoelectric body formed on the first lower electrode, and a first upper electrode formed on the first piezoelectric body, and

wherein the second stacked structure has a second lower electrode, a second piezoelectric body formed on the second lower electrode, and a second upper electrode formed on the second piezoelectric body.

6. A tire comprising the power-generating vibration sensor according to claim 1 that is mounted on an inner wall of the tire,

wherein the tire estimates a condition of the tire and a condition of a road surface, from a power waveform obtained by the power-generating vibration sensor when the power-generating vibration sensor reaches ground, and a power waveform obtained when the power-generating vibration sensor moves away from the ground.

7. An electrical device comprising the power-generating vibration sensor according to claim 1.