Patent
SYSTEM AND METHOD FOR SENSOR THERMAL DRIFT OFFSET COMPENSATION
| العنوان: | SYSTEM AND METHOD FOR SENSOR THERMAL DRIFT OFFSET COMPENSATION |
|---|---|
| Document Number: | 20090212847 |
| تاريخ النشر: | August 27, 2009 |
| Appl. No: | 12/325465 |
| Application Filed: | December 01, 2008 |
| مستخلص: | A system and method for compensating for thermal drift. A temperature is measured in a meter as a temperature voltage. The temperature voltage is converted to a digital signal. The digital signal is processed to generate an offset voltage in response to the digital signal. The offset voltage is applied as an input to an amplifier. The amplifier receives as a second input a gauge voltage. An output is generated from the meter that corrects the gauge voltage using the offset voltage to compensate for thermal drift. |
| Inventors: | Schultz, Al (Center Valley, PA, US); Mazza, Chris (Harleysville, PA, US); Conner, Gary (Harleysville, PA, US) |
| Claim: | 1. A method for compensating for thermal drift, the method comprising: measuring a temperature in a meter as a temperature voltage; converting the temperature voltage to a digital signal; processing the digital signal to generate an offset voltage in response to the digital signal; applying the offset voltage as an input to an amplifier, the amplifier receiving as a second input a gauge voltage; and generating an output from the meter that corrects the gauge voltage using the offset voltage to compensates for thermal drift. |
| Claim: | 2. The method according to claim 1, wherein the temperature is measured by a temperature sensor, and wherein the gauge voltage is measured by a gauge. |
| Claim: | 3. The method according to claim 2, wherein the gauge is any of a mass flow sensor and a pressure bridge sensor. |
| Claim: | 4. The method according to claim 1, further comprising: converting the offset signal generated utilizing the digital signal to the offset voltage. |
| Claim: | 5. The method according to claim 1, further comprising: amplifying a corrected voltage utilizing an instrumentation amplifier, wherein an amplified gauge voltage is generated by the amplifier based on the offset voltage and the gauge voltage. |
| Claim: | 6. The method according to claim 1, further comprising: converting the amplified gauge voltage that has been amplified to a digital output; and processing the digital output to generate the output for the meter. |
| Claim: | 7. The method according to claim 1, wherein an entire range of the gauge is processed due to the offset voltage. |
| Claim: | 8. The method according to claim 1, wherein the processing further comprises: performing polynomial conversion or utilizing a look-up table utilizing the digital signal to generate the offset voltage. |
| Claim: | 9. The method according to claim 8, further comprising: determining an equation to utilize while performing the polynomial conversion. |
| Claim: | 10. The method according to claim 9, wherein the equation is determined based on the characteristics of the meter at a plurality of temperatures. |
| Claim: | 11. A meter comprising: a gauge outputting a gauge voltage; a temperature sensor configured to measure a temperature in the gauge; an analog-to-digital converter (ADC) in communication with the temperature sensor, the ADC configured to convert a temperature voltage measured by the temperature sensor to a digital signal; a processor in communication with the ADC, the processor configured to generate a offset signal based on the digital signal; a digital to analog converter (DAC) in communication with the processor, the DAC configured to convert the offset signal to a offset voltage; an instrumentation amplifier in communication with the gauge, the instrumentation amplifier configured to receive the gauge voltage and the offset voltage and output an amplified gauge voltage; and a second ADC in communication with the instrumentation amplifier and the processor, the second ADC configured to convert the amplified gauge voltage to a digital output, wherein the digital output is processed by the processor for output from the meter. |
| Claim: | 12. The meter according to claim 11, wherein the processor utilizes polynomial conversion to generate the offset signal based on the digital signal. |
| Claim: | 13. The meter according to claim 11, wherein the processor is pre-configured to utilize polynomial conversion based on the temperature characteristics of. |
| Claim: | 14. The meter according to claim 11, wherein the gauge is any of a strain gauge pressure sensor and mass flow sensor. |
| Claim: | 15. The meter according to claim 11, wherein the instrumentation amplifier receives an entire signal span of the gauge voltage from the gauge for amplification and conversion by the ADC. |
| Claim: | 16. The meter according to claim 11, wherein the processor utilizes a look-up table to generate the offset signal, and wherein the processor further processes the digital output removing noise and performing signals corrections to generate a meter output that is communicated from the meter to an external device. |
| Claim: | 17. A method for compensating for thermal drift in a meter, the method comprising: measuring a temperature in a meter as a temperature voltage; converting the temperature voltage to a digital signal; generating an offset voltage in response to the digital signal, wherein the offset voltage is generated by performing polynomial conversion utilizing the digital signal; applying the offset voltage as an input to an amplifier, the amplifier receiving as a second input a gauge voltage to generate an amplified gauge voltage as an output; converting the amplified gauge voltage that has been amplified to a digital output; and processing the digital output to generate an output from the meter that corrects the gauge voltage using the offset voltage to compensate for thermal drift. |
| Claim: | 18. The method according to claim 17, further comprising: determining an equation to utilize while performing the polynomial conversion, the equation is determined based on the characteristics of the meter at a plurality of temperatures. |
| Claim: | 19. The method according to claim 17, wherein the gauge voltage is measured by a gauge in the meter, and wherein the gauge is any of a strain gauge pressure sensor and mass flow sensor. |
| Claim: | 20. The method according to claim 19, wherein an entire range of the gauge voltage measured by the gauge is converted to the digital output. |
| Current U.S. Class: | 327/513 |
| Current International Class: | 01 |
| رقم الانضمام: | edspap.20090212847 |
| قاعدة البيانات: | USPTO Patent Applications |
| ResultId |
1 |
|---|---|
| Header |
edspap USPTO Patent Applications edspap.20090212847 719 3 Patent patent 719.044189453125 |
| PLink |
https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=edspap&AN=edspap.20090212847&custid=s6537998&authtype=sso |
| FullText |
Array
(
[Availability] => 0
)
Array ( [0] => Array ( [Url] => https://ppubs.uspto.gov/pubwebapp/external.html?q=(%2220090212847%22).pn.&db=US-PGPUB&type=ids [Name] => EDS - USPTO Patent Applications [Category] => fullText [Text] => View record in USPTO Patent Applications [MouseOverText] => View record in USPTO Patent Applications ) ) |
| Items |
Array
(
[Name] => Title
[Label] => Title
[Group] => Ti
[Data] => SYSTEM AND METHOD FOR SENSOR THERMAL DRIFT OFFSET COMPENSATION
)
Array ( [Name] => DocumentID [Label] => Document Number [Group] => Patent [Data] => 20090212847 ) Array ( [Name] => DateEntry [Label] => Publication Date [Group] => Patent [Data] => August 27, 2009 ) Array ( [Name] => DocumentID [Label] => Appl. No [Group] => Patent [Data] => 12/325465 ) Array ( [Name] => DateFiled [Label] => Application Filed [Group] => Patent [Data] => December 01, 2008 ) Array ( [Name] => Abstract [Label] => Abstract [Group] => Ab [Data] => A system and method for compensating for thermal drift. A temperature is measured in a meter as a temperature voltage. The temperature voltage is converted to a digital signal. The digital signal is processed to generate an offset voltage in response to the digital signal. The offset voltage is applied as an input to an amplifier. The amplifier receives as a second input a gauge voltage. An output is generated from the meter that corrects the gauge voltage using the offset voltage to compensate for thermal drift. ) Array ( [Name] => Author [Label] => Inventors [Group] => Patent [Data] => <searchLink fieldCode="ZA" term="%22Schultz%2C+Al%22">Schultz, Al</searchLink> (Center Valley, PA, US); <searchLink fieldCode="ZA" term="%22Mazza%2C+Chris%22">Mazza, Chris</searchLink> (Harleysville, PA, US); <searchLink fieldCode="ZA" term="%22Conner%2C+Gary%22">Conner, Gary</searchLink> (Harleysville, PA, US) ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 1. A method for compensating for thermal drift, the method comprising: measuring a temperature in a meter as a temperature voltage; converting the temperature voltage to a digital signal; processing the digital signal to generate an offset voltage in response to the digital signal; applying the offset voltage as an input to an amplifier, the amplifier receiving as a second input a gauge voltage; and generating an output from the meter that corrects the gauge voltage using the offset voltage to compensates for thermal drift. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 2. The method according to claim 1, wherein the temperature is measured by a temperature sensor, and wherein the gauge voltage is measured by a gauge. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 3. The method according to claim 2, wherein the gauge is any of a mass flow sensor and a pressure bridge sensor. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 4. The method according to claim 1, further comprising: converting the offset signal generated utilizing the digital signal to the offset voltage. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 5. The method according to claim 1, further comprising: amplifying a corrected voltage utilizing an instrumentation amplifier, wherein an amplified gauge voltage is generated by the amplifier based on the offset voltage and the gauge voltage. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 6. The method according to claim 1, further comprising: converting the amplified gauge voltage that has been amplified to a digital output; and processing the digital output to generate the output for the meter. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 7. The method according to claim 1, wherein an entire range of the gauge is processed due to the offset voltage. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 8. The method according to claim 1, wherein the processing further comprises: performing polynomial conversion or utilizing a look-up table utilizing the digital signal to generate the offset voltage. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 9. The method according to claim 8, further comprising: determining an equation to utilize while performing the polynomial conversion. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 10. The method according to claim 9, wherein the equation is determined based on the characteristics of the meter at a plurality of temperatures. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 11. A meter comprising: a gauge outputting a gauge voltage; a temperature sensor configured to measure a temperature in the gauge; an analog-to-digital converter (ADC) in communication with the temperature sensor, the ADC configured to convert a temperature voltage measured by the temperature sensor to a digital signal; a processor in communication with the ADC, the processor configured to generate a offset signal based on the digital signal; a digital to analog converter (DAC) in communication with the processor, the DAC configured to convert the offset signal to a offset voltage; an instrumentation amplifier in communication with the gauge, the instrumentation amplifier configured to receive the gauge voltage and the offset voltage and output an amplified gauge voltage; and a second ADC in communication with the instrumentation amplifier and the processor, the second ADC configured to convert the amplified gauge voltage to a digital output, wherein the digital output is processed by the processor for output from the meter. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 12. The meter according to claim 11, wherein the processor utilizes polynomial conversion to generate the offset signal based on the digital signal. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 13. The meter according to claim 11, wherein the processor is pre-configured to utilize polynomial conversion based on the temperature characteristics of. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 14. The meter according to claim 11, wherein the gauge is any of a strain gauge pressure sensor and mass flow sensor. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 15. The meter according to claim 11, wherein the instrumentation amplifier receives an entire signal span of the gauge voltage from the gauge for amplification and conversion by the ADC. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 16. The meter according to claim 11, wherein the processor utilizes a look-up table to generate the offset signal, and wherein the processor further processes the digital output removing noise and performing signals corrections to generate a meter output that is communicated from the meter to an external device. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 17. A method for compensating for thermal drift in a meter, the method comprising: measuring a temperature in a meter as a temperature voltage; converting the temperature voltage to a digital signal; generating an offset voltage in response to the digital signal, wherein the offset voltage is generated by performing polynomial conversion utilizing the digital signal; applying the offset voltage as an input to an amplifier, the amplifier receiving as a second input a gauge voltage to generate an amplified gauge voltage as an output; converting the amplified gauge voltage that has been amplified to a digital output; and processing the digital output to generate an output from the meter that corrects the gauge voltage using the offset voltage to compensate for thermal drift. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 18. The method according to claim 17, further comprising: determining an equation to utilize while performing the polynomial conversion, the equation is determined based on the characteristics of the meter at a plurality of temperatures. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 19. The method according to claim 17, wherein the gauge voltage is measured by a gauge in the meter, and wherein the gauge is any of a strain gauge pressure sensor and mass flow sensor. ) Array ( [Name] => Comment [Label] => Claim [Group] => Patent [Data] => 20. The method according to claim 19, wherein an entire range of the gauge voltage measured by the gauge is converted to the digital output. ) Array ( [Name] => CodeClass [Label] => Current U.S. Class [Group] => Patent [Data] => 327/513 ) Array ( [Name] => CodeClass [Label] => Current International Class [Group] => Patent [Data] => 01 ) Array ( [Name] => AN [Label] => Accession Number [Group] => ID [Data] => edspap.20090212847 ) |
| RecordInfo |
Array
(
[BibEntity] => Array
(
[Languages] => Array
(
[0] => Array
(
[Text] => English
)
)
[Titles] => Array
(
[0] => Array
(
[TitleFull] => SYSTEM AND METHOD FOR SENSOR THERMAL DRIFT OFFSET COMPENSATION
[Type] => main
)
)
)
[BibRelationships] => Array
(
[HasContributorRelationships] => Array
(
[0] => Array
(
[PersonEntity] => Array
(
[Name] => Array
(
[NameFull] => Schultz, Al
)
)
)
[1] => Array
(
[PersonEntity] => Array
(
[Name] => Array
(
[NameFull] => Mazza, Chris
)
)
)
[2] => Array
(
[PersonEntity] => Array
(
[Name] => Array
(
[NameFull] => Conner, Gary
)
)
)
)
[IsPartOfRelationships] => Array
(
[0] => Array
(
[BibEntity] => Array
(
[Dates] => Array
(
[0] => Array
(
[D] => 27
[M] => 08
[Text] => August 27, 2009
[Type] => published
[Y] => 2009
)
)
)
)
)
)
)
|
| IllustrationInfo |