METHOD FOR DETECTING AN ERROR IN A MEASUREMENT CYCLE

• US 20080120066A1
• Filed: 11/19/2007
• Published: 05/22/2008
• Est. Priority Date: 11/22/2006
• Status: Active Grant

• Current Assignee: Miele & CIE KG
• Original Assignee: Miele & CIE KG
• Inventors: Beier, Dominic
• Granted Patent: US 7,657,398 B2
• Time in Patent Office: Days
• US Class Current: 702/183
• CPC Class Codes: G01K 11/265 using surface acoustic wave [SAW]
• CPC Class Codes: G01K 2207/06 for preparation purposes
• CPC Class Codes: H04Q 2209/40 using a wireless architecture
• CPC Class Codes: H04Q 2209/84 Measuring functions
• CPC Class Codes: H04Q 2209/86 Performing a diagnostic of the sensing device
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

A method of detecting an error in a measurement cycle. The method includes wirelessly transmitting a sequence of electrical signals sweeping through a predetermined frequency band from a transmitter to the receiver of an electric evaluation circuit of household appliance controller. The levels of the signals are measured, and a parameter is calculated from the signal levels in the evaluation circuit. The parameter is compared to an upper and lower limit, and the quality of the measurement cycle is determined as a function of the comparison.

Claims

1. :

A method of detecting an error in a measurement cycle comprising;

wirelessly transmitting a sequence of electrical signals, sweeping through a predetermined frequency band, from a transmitter to a receiver of an electric evaluation circuit of a house hold appliance controller;

measuring levels of the signals;

calculating a parameter from the signal levels in the evaluation circuit;

comparing the parameter to an upper and a lower limit; and

determining the quality of the measurement cycle as a function of the comparison.

2. :

The method as recited in claim 1 wherein the parameter is an integrated or cumulative value of the signal levels.

3. :

The method as recited in claim 1 wherein the calculating the parameter includes;

determining a highest signal level at a resonant frequency;

determining a transmit frequency limit corresponding to a signal level that is lower than the highest signal level by a predetermined and stored signal level ratio;

determining a difference between the transmit frequency limit and the resonant frequency;

generating a pair of values from the highest signal level and said difference; and

calculating the parameter from the pair of values.

4. :

The method recited in claim 1 wherein, if the parameter is below the lower limit, further comprising;

increasing at least one of the sensitivity of the receiver and the transmit power of the transmitter in a subsequent measurement cycle, or

issuing a visual or audible error message to a user.

5. :

The method as recited in claim 4 wherein the error message is issued if at least one of the sensitivity of the receiver and the transmit power of the transmitter is at a respective maximum.

6. :

The method recited in claim 1 wherein, if the parameter is above the upper limit, further comprising;

decreasing at least one of the sensitivity of the receiver and the transmit power of the transmitter in a subsequent measurement cycle, or

issuing an error message to a user.

7. :

The method as recited in claim 6 wherein the error message is issued if at least one of the sensitivity of the receiver and the transmit power of the transmitter is at a respective maximum.

8. :

The method as recited in claim 1 further comprising, if the parameter is within a range between the lower and upper limits, using the measurement cycle for a normal operation of the household appliance.

9. :

The method recited in claim 5 wherein, if the parameter is above the upper limit, further comprising;

decreasing at least one of the sensitivity of the receiver and the transmit power of the transmitter in a subsequent measurement cycle, or

issuing another error message to the user.

10. :

The method as recited in claim 9 wherein the other error message is issued if at least one of the sensitivity of the receiver and the transmit power of the transmitter is at a respective maximum.

11. :

The method as recited in claim 10 further comprising, if the parameter is within a range between the lower and upper limits, using the measurement cycle for a normal operation of the household appliance.

12. :

The method recited in claim 3 wherein, if the parameter is below the lower limit, further comprising;

increasing at least one of the sensitivity of the receiver and the transmit power of the transmitter in a subsequent measurement cycle, or

issuing a visual or audible error message to a user.

13. :

The method as recited in claim 12 wherein the error message is issued if at least one of the sensitivity of the receiver and the transmit power of the transmitter is at a respective maximum.

14. :

The method recited in claim 3 wherein, if the parameter is above the upper limit, further comprising;

decreasing at least one of the sensitivity of the receiver and the transmit power of the transmitter in a subsequent measurement cycle, or

issuing an error message to a user.

15. :

The method as recited in claim 14 wherein the error message is issued if at least one of the sensitivity of the receiver and the transmit power of the transmitter is at a respective maximum.

16. :

The method as recited in claim 3 further comprising, if the parameter is within a range between the lower and upper limits, using the measurement cycle for a normal operation of the household appliance.

17. :

The method recited in claim 13 wherein, if the parameter is above the upper limit, further comprising;

decreasing at least one of the sensitivity of the receiver and the transmit power of the transmitter in a subsequent measurement cycle, or

issuing another error message to the user.

18. :

The method as recited in claim 17 wherein the other error message is issued if at least one of the sensitivity of the receiver and the transmit power of the transmitter is at a respective maximum.

19. :

The method as recited in claim 18 further comprising, if the parameter is within a range between the lower and upper limits, using the measurement cycle for a normal operation of the household appliance.

20. :

The method as recited in claim 19, wherein the parameter is an integrated or cumulative value of the signal levels.