Title:
METHOD AND APPARATUS FOR REDUCING POWER CONSUMPTION IN BATTERY-OPERATED DEVICES
Document Type and Number:
WIPO Patent Application WO2005055017
Kind Code:
A3
Abstract:
The invention relates to an energy-saving sampling method and an electrical apparatus (1, 1'), particularly an electronic gas meter (1') or motion detector (1), for carrying out said method. The aim of the invention is to reduce power consumption (I) of the battery (105) in said method and apparatus (1, 1'). Said aim is achieved by sampling the test signal (100b, 101b) in a quasi continuous (13) manner by defining sampling time slots (14') during which sampling is done in an uninterrupted fashion while sampling gaps (14) during which no sampling is done are allowed between the sampling time slots (14'). Examples of embodiments include sampling gaps (14) at regular or random intervals, sampling gaps (14) with a variable duration and/or frequency and especially an increasing duration and/or frequency as the remaining service life of the battery decreases, and a lower sampling rate (f1, f2, f3) during the sampling time slots (14'), among others, resulting in an increased battery lifetime without substantially reducing test reliability.
Inventors:
KRAMER BEAT (CH)
Application Number:
PCT/CH2004/000717
Publication Date:
September 15, 2005
Filing Date:
November 29, 2004
Export Citation:
Assignee:
ABB RESEARCH LTD (CH)
KRAMER BEAT (CH)
KRAMER BEAT (CH)
International Classes:
G01F15/06; G06F1/32; G08B13/189; (IPC1-7): G08B13/189; G01F15/06
Domestic Patent References:
| WO2002071165A2 | 2002-09-12 |
Foreign References:
| EP0898152A1 | 1999-02-24 | |||
| EP1191310A2 | 2002-03-27 | |||
| EP1278047A2 | 2003-01-22 | |||
| EP0492427A2 | 1992-07-01 |
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