Self-power generation type transmitter

• US 20030139155A1
• Filed: 10/29/2002
• Published: 07/24/2003
• Est. Priority Date: 10/29/2001
• Status: Abandoned Application

• Current Assignee: U.S.C. Corporation
• Original Assignee: U.S.C. Corporation
• Inventors: Sakai, Yasuhiro
• Application Number:
  US10/282,241
• Publication Number:
  US 20030139155A1
• Time in Patent Office: Days
• US Class Current: 455/127.1
• CPC Class Codes: B60R 25/24 using electronic identifiers containing a code not memorised by the user
• CPC Class Codes: B60R 25/406 Power supply in the remote key
• CPC Class Codes: E05B 2047/0062 by generator
• CPC Class Codes: G07C 2009/00587 by battery
• CPC Class Codes: G07C 9/00182 operated with unidirectional data transmission between data carrier and locks
• CPC Class Codes: H02N 2/18 producing electrical output from mechanical input, e.g. generators for measurement devices G01
• CPC Class Codes: H04B 1/04 Circuits

Abstract

In a self-power generation type transmitter, piezoelectric elements are used as a power source for transmission and generated power is efficiently utilized so that the transmission of a signal requiring a relatively high electric power can be performed. The self-power generation type transmitter includes a power generating part 2 for generating electric power by applying distortion to piezoelectric elements 21, a charging part 3 for repeatedly charging generated power, and a transmitting part 4 for transmitting a signal by the charged power. When an amount of charged power reaches a level at which the signal can be transmitted, the electric power is supplied to the transmitting part from the charging part.

Claims

1. A self-power generation type transmitter comprising:

a power generating part for generating power by applying distortion to piezoelectric elements, a charging part for repeatedly charging generated power and a transmitting part for transmitting a signal by the charged power, wherein when an amount of charged power reaches a level at which the signal can be transmitted, the electric power is supplied to the transmitting part from the charging part.

2. The self-power generation type transmitter according to claim 1, wherein the charging part is provided with deciding means for deciding whether or not the amount of charged power reaches the level at which the signal can be transmitted.

3. The self-power generation type transmitter according to claim 2, wherein the deciding means of the charging part decides the amount of charged electric in accordance with a timing of the power generation of the piezoelectric elements.

4. The self-power generation type transmitter according to claim 2 or 3, wherein the charging part includes discharge switching means for starting a discharging operation when it is decided that the amount of charged power is located at the level where the signal can be transmitted, and stopping a discharging operation when the transmitting part completes the transmission of the signal.

5. The self-power generation type transmitter according to claim 2 or 3, wherein the power generating part includes the piezoelectric elements and a colliding member which collides with the piezoelectric elements, and the deciding means decides the amount of charged power in accordance with a timing at which the colliding member collides with the piezoelectric elements to generate the power.

6. The self-power generation type transmitter according to any one of claims 1 to 3, wherein the transmitting part does not transmit a signal until the transmitting part receives an instruction for transmitting a signal after the electric power is supplied to the transmitting part from the charging part.

7. The self-power generation type transmitter according to claim 4, wherein the power generating part includes the piezoelectric elements and a colliding member which collides with the piezoelectric elements, and the deciding means decides the amount of charged power in accordance with a timing at which the colliding member collides with the piezoelectric elements to generate the power.

8. The self-power generation type transmitter according to claim 4, wherein the transmitting part does not transmit a signal until the transmitting part receives an instruction for transmitting a signal after the electric power is supplied to the transmitting part from the charging part.

9. The self-power generation type transmitter according to claim 5, wherein the transmitting part does not transmit a signal until the transmitting part receives an instruction for transmitting a signal after the electric power is supplied to the transmitting part from the charging part.

10. The self-power generation type transmitter according to claim 6, wherein the transmitting part does not transmit a signal until the transmitting part receives an instruction for transmitting a signal after the electric power is supplied to the transmitting part from the charging part.