Apparatus and method for determining a state parameter of an object to be monitored

• US 8,942,949 B2
• Filed: 11/06/2007
• Issued: 01/27/2015
• Est. Priority Date: 03/04/2004
• Status: Active Grant

• Current Assignee: Infineon Technologies AG
• Original Assignee: Infineon Technologies AG
• Inventors: Hammerschmidt, Dirk
• Primary Examiner(s): Teixeira Moffat, Jonathan C
• Assistant Examiner(s): Casey, Liam R
• Application Number:
  US11/935,951
• Publication Number:
  US 20080062004A1
• Time in Patent Office: 2,639 Days
• Field of Search: 702/127, 702/138, 702/140, 702/141
• US Class Current: 702/140
• CPC Class Codes: B60C 23/0408 transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
• CPC Class Codes: B60C 23/0474 Measurement control, e.g. setting measurement rate or calibrating of sensors; Further processing of measured values, e.g. filtering, compensating or slope monitoring

Abstract

An apparatus for determining a state parameter of an object to be monitored includes a means for providing a plurality of measurement values, wherein the measurement values include information relating to the state parameter of the object to be monitored, a comparison means for comparing the measurement value to a predeterminable comparison parameter, wherein the comparison means is formed to output a first comparison signal when a predeterminable number of measurement values falls below the comparison parameter within a measurement interval, or to output a second comparison signal when the predeterminable number of measurement values exceeds or reaches the comparison parameter, wherein the first comparison signal or the second comparison signal indicate the state parameter.

Claims

1. An apparatus for determining a driving situation of a vehicle to be monitored, comprising:

a provider configured to provide a plurality of measurement values, wherein the measurement values comprise information relating to the driving situation of the vehicle to be monitored;

a comparator configured to compare the measurement values with a predetermined comparison parameter, wherein the comparator is further configured to output a first comparison signal when a predetermined number of measurement values within a measurement interval falls below the predetermined comparison parameter, or wherein the comparator is further configured to output a second comparison signal when the predetermined number of measurement values within the measurement interval reaches or exceeds the predetermined comparison parameter, wherein the first comparison signal or the second comparison signal indicates the driving situation of the vehicle,

wherein the driving situation of the vehicle comprises one of a parking state causing a static load condition in the tire and a motion state causing dynamic load changes in the tire,

wherein the provider comprises a tire pressure sensor,

wherein the provider comprises an evaluator configured to evaluate the plurality of measurement values and provide evaluated measurement values as measurement values in response thereto;

wherein the evaluator comprises a determiner configured to determine an average value of the plurality of measurement values, wherein the evaluated measurement values are the differences or the absolute value of the differences between the measurement values and the average value, and

wherein the average value of the evaluated measurement values is the predetermined comparison parameter.

2. The apparatus of claim 1, wherein the determiner comprises a low-pass filter configured to determine the average value by low-pass filtering.

3. The apparatus of claim 1, further comprising a determiner configured to determine and provide the predetermined comparison parameter.

4. The apparatus according to claim 3, wherein the determiner is configured to output a multiple of the average value or a fraction of the average value as the predetermined comparison parameter.

5. The apparatus of claim 3, wherein the determiner is controllable, and wherein the apparatus for determining the driving situation further comprises:

a controller configured to control the determiner, wherein the controller is configured to generate a first control signal, in response to which the determiner determines the predetermined comparison parameter, and wherein the controller is further configured to generate a second control signal, in response to which the determiner interrupts a determination of the predetermined comparison parameter.

6. The apparatus of claim 5, wherein the driving situation is a driving situation of a vehicle, wherein the driving situation comprises one of a parking state and a motion state, and wherein the controller is configured to output the first control signal when the first or the second control signal indicates the parking state, and to output the second control signal when the first or second control signal indicates the driving state.

7. The apparatus of claim 1, wherein the provider comprises a measurement sensor, and wherein the measurement sensor is a tire pressure sensor or an acceleration sensor, and wherein the driving situation is a driving situation of a vehicle, and wherein the driving situation comprises one of a parking state and a motion state, and wherein the measurement sensor has a first measurement rate in the parking state and a second measurement rate in the motion state, and wherein the first measurement rate and the second measurement rate are different.

8. The apparatus of claim 1, wherein the measurement interval comprises a time period corresponding to a number of measurement values.

9. The apparatus of claim 8, wherein the number of measurement values is set.

10. The apparatus of claim 9, further comprising a determiner configured to determine the number of measurement values.

11. The apparatus of claim 1, further comprising a determiner configured to determine the predetermined number of measurement values.

12. The apparatus of claim 1, wherein the driving situation indicates a driving situation of a vehicle, and wherein the driving situation comprises one of a parking state and a motion state, and wherein the first or second comparison signal indicates the parking state, and wherein the other of the first or second comparison signal indicates the motion state.

13. The apparatus of claim 1, wherein the provider comprises an acceleration sensor.

14. An apparatus for determining a state parameter of an object to be monitored, comprising:

a provider configured to provide a plurality of measurement values, wherein the measurement values comprise information relating to the state parameter of the object to be monitored;

a comparator configured to compare the measurement values with a predetermined comparison parameter, wherein the comparator is further configured to output a first comparison signal when a predetermined number of measurement values within a measurement interval falls below the predetermined comparison parameter, or wherein the comparator is further configured to output a second comparison signal when the predetermined number of measurement values within the measurement interval reaches or exceeds the predetermined comparison parameter, wherein the first comparison signal or the second comparison signal indicate the state parameter, and wherein the predetermined number of measurement values is at least two;

wherein the provider comprises an evaluator configured to evaluate the plurality of measurement values and provide evaluated measurement values as measurement values in response thereto;

wherein the evaluator comprises a determiner configured to determine an average value of the plurality of measurement values, and a subtracter configured to determine a difference between the measurement values and the average value, wherein the evaluated measurement values are the differences or an absolute value of the differences;

wherein the determiner is configured to determine an average value of the measurement values, and wherein the average value of the evaluated measurement values is the predetermined comparison parameter;

wherein the state parameter is a driving situation of a vehicle, and wherein the driving situation comprises one of a non-operated state and a driving state, and wherein the provider comprises a tire pressure sensor or an acceleration sensor.

15. The apparatus of claim 14, wherein the determiner comprises a low-pass filter configured to determine the average value of the measurement values by low-pass filtering.