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Method and system for energy efficient measurement of sensor signals

A sensor signal and sensor technology, applied in the direction of measuring devices, instruments, special data processing applications, etc., can solve problems such as low efficiency and difficult power consumption

Active Publication Date: 2016-10-05
MICROCHIP TECH GERMANY II
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This can become even more difficult if the sensor is implemented in the mobile device and can require additional power which can make power consumption inefficient

Method used

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  • Method and system for energy efficient measurement of sensor signals
  • Method and system for energy efficient measurement of sensor signals
  • Method and system for energy efficient measurement of sensor signals

Examples

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Embodiment Construction

[0019] According to various embodiments, the average value formation process for synchronizing sampled measurements, in particular in systems receiving sensor signals, may be made adaptive. Such a system could be, for example, a touch sensing system or, in particular, a gesture detection system that uses proximity detection and does not necessarily require physical touch. For example, a low frequency electric field can be generated using electrode plates that are fed a low frequency signal (eg, a 100 kHz AC or square wave signal). Other electrode plates can be used to detect disturbances caused by objects entering the electric field. Received signals can be preprocessed and assembled into packets for further processing.

[0020] According to various embodiments, in general, packets containing a low number of desired signal periods are measured and averaged, where for each desired signal period the sampling instant is preferably set synchronously with the transmitter signal to...

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Abstract

The invention relates to a method for measuring sensor signals, having the steps of: a) receiving a signal packet with a plurality of sampled sensor signals; b) determining a signal level from said sampled sensor signals; c) determining the d) comparing said determined signal change with a predetermined noise threshold, and if said change is below said noise threshold, using said signal packet for further processing, and if said changes above the noise threshold, then sum the signal levels and repeat steps a) to c), and determine if a predetermined number of repetitions has been reached, and if so, sum the summed signal levels average value.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 61 / 635,508, filed April 19, 2012, which is hereby incorporated in its entirety. technical field [0003] The invention relates to the energy efficient measurement of sensor signals, in particular sensor signals subjected to noise and in particular capacitive sensor signals. Background technique [0004] Human device interfaces include touch sensing and gesture detection systems based on capacitive touch sensing and / or capacitive proximity detection. In many systems, these capacitive sensors and associated detection circuitry require constant power on and the corresponding power consumption is typically kept to a minimum within the normal discharge current of a rechargeable battery. Other sensor technologies face similar problems. [0005] In any sensor-based technology, the sensor signal is usually subject to environmental influences, in particula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D3/032
CPCG01D3/032G06F17/00
Inventor 安德烈亚斯·多夫纳克劳斯·卡尔特纳
Owner MICROCHIP TECH GERMANY II
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