Wake-up device and method for generating a control signal

Abstract

A wake-up device for generating a control signal is presented. The wake-up device comprises a sensor for detecting an input signal, that comprises at least one knock, and an electrical circuitry for processing the detected input signal and generating said control signal. Further, a method for generating a control signal from a wake-up device is also presented.

1 . A wake-up device for generating a control signal comprising 
 a sensor for detecting an input signal, that comprises at least one knock, and    an electrical circuitry for processing the detected input signal and generating said control signal.    
   
   
       2 . A wake-up device according to  claim 1 , wherein said sensor is selected from the group consisting of acoustic sensors and vibration sensors.  
   
   
       3 . A wake-up device according to  claim 2 , wherein said sensor is selected from the group consisting of microphones and accelerometers.  
   
   
       4 . A wake-up device according to  claim 1 , wherein said electrical circuitry is configured to detect at least one of the signal intensity, the number of knocks, and the frequency distribution of the input signal.  
   
   
       5 . A wake-up device according to  claim 1 , wherein said electrical circuitry comprises a filter for filtering the input signal.  
   
   
       6 . A wake-up device according to  claim 5 , wherein said filter is a band pass filter.  
   
   
       7 . A wake-up device according to  claim 1 , wherein said electrical circuitry is configured to apply a predetermined criteria to the detected input signal for deciding whether or not the control signal should be generated.  
   
   
       8 . A method for generating a control signal from a wake-up device, comprising the steps of 
 detecting at least one knock as an input signal,    processing the detected signal, and    generating said control signal.    
   
   
       9 . A method according to  claim 8 , further comprising detecting at least one of the signal intensity, the number of knocks, and the frequency distribution of the input signal.  
   
   
       10 . A method according to  claim 8 , further comprising filtering the detected input signal.  
   
   
       11 . A method according to  claim 10 , further comprising filtering the detected input signal by means of a band pass filter.  
   
   
       12 . A method according to  claim 8 , further comprising applying a predetermined criteria to the detected input signal for deciding whether or not the control signal should be generated.