×

Diagnostic apparatus and method for home appliance

  • US 9,979,560 B2
  • Filed: 08/17/2012
  • Issued: 05/22/2018
  • Est. Priority Date: 08/18/2011
  • Status: Active Grant
First Claim
Patent Images

1. A diagnostic apparatus for diagnosing a home appliance in response to a signal, comprising a plurality of frequencies, received from the home appliance, the diagnostic apparatus comprising:

  • a microphone through which the signal is input, the signal having been output in the form of a sound signal having the plurality of frequencies by the home appliance and transmitted to the diagnostic apparatus via a communication network;

    a signal processor that sets a symbol time and extracts product information from the signal by converting the signal based on the symbol time defining times for determining a value associated with the signal;

    a diagnosing device that diagnoses the home appliance by analyzing the product information and outputs a status of the home appliance;

    a processor that outputs a plurality of explanations for the diagnosis of the home appliance and a diagnosis result;

    a data storage device that stores diagnosis data and the diagnosis result; and

    an output that displays a variety of information including a diagnosing status, the plurality of explanations, and the diagnosis result for the home appliance, wherein the signal processor sets the symbol time to a first symbol time as a predetermined time and determines that an error occurred due to noise or distortion of a frequency shift generated during transfer of the signal from the home appliance to the diagnostic apparatus, wherein when an error occurs with an error check result on a resultant signal generated after signal conversion at the first symbol time, the signal processor changes and sets the symbol time to a second symbol time, repeats changing the symbol time by increasing or decreasing the symbol time, until the error check result is normal, extracts the product information from the signal using the symbol time when the error check result is normal, wherein the first symbol time is set and stored as information for a signal output by the home appliance when the signal is outputted, and wherein the signal processor sets the symbol time with respect to a frame time of one frame in a plurality of frames constituting the signal, and divides the frame time by a number of symbols per frame in the signal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×