WO2010046711A2 - Callibration coefficients for sensor based measurements - Google Patents

Callibration coefficients for sensor based measurements Download PDF

Info

Publication number
WO2010046711A2
WO2010046711A2 PCT/GB2009/051433 GB2009051433W WO2010046711A2 WO 2010046711 A2 WO2010046711 A2 WO 2010046711A2 GB 2009051433 W GB2009051433 W GB 2009051433W WO 2010046711 A2 WO2010046711 A2 WO 2010046711A2
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
sensor device
calibration data
data
group
Prior art date
Application number
PCT/GB2009/051433
Other languages
French (fr)
Other versions
WO2010046711A3 (en
Inventor
Paul Edward Vickery
John Peter Beckley
Original Assignee
Transense Technologies Plc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Transense Technologies Plc filed Critical Transense Technologies Plc
Priority to CN2009801421503A priority Critical patent/CN102203558A/en
Priority to JP2011532724A priority patent/JP2012506554A/en
Priority to EP09774916A priority patent/EP2370788A2/en
Publication of WO2010046711A2 publication Critical patent/WO2010046711A2/en
Publication of WO2010046711A3 publication Critical patent/WO2010046711A3/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • B60C23/0415—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
    • G01D18/008—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00 with calibration coefficients stored in memory
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/02—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation
    • G01D3/022—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation having an ideal characteristic, map or correction data stored in a digital memory
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L17/00—Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
    • G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
    • G01L9/0008—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using vibrations
    • G01L9/0022—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using vibrations of a piezoelectric element
    • G01L9/0025—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using vibrations of a piezoelectric element with acoustic surface waves

Definitions

  • the present invention relates to systems and methods for associating calibration information with sensor devices.
  • WO2007/005020 discloses a system in which all calibration data is stored on an RFID tag that is kept with the sensor. Prior to interrogating the sensor, the tag is first read to retrieve the calibration coefficients. This system has the drawback, however, that it can take a significant amount of time to read all the required data. When a RFID tag is placed within an environment such as the wheel of a passenger car the read range can be severely effected. Particularly when the vehicle is moving at speed it can become difficult to have a long enough opportunity to read all the required data from the tag.
  • Another method is to group the sensors so that for a particular application only sensors that fall within a given range will be used and then an ' average' set of calibration coefficients could be used.
  • a problem of this approach is that for some applications that require a high accuracy specification the groups can become very narrow thus making it logistically problematic with a large number of groups or suffer a very poor sensor yield.
  • a third approach, disclosed in EP1659374, is to provide again a RFID with the sensor but storing therein only a serial number/identification number which uniquely identifies the sensor with which it is associated. All applicable sensor coefficients are then stored in a database which may be stored locally to the interrogation electronics or may be stored remotely, being accessed from another onboard system or from an even remoter source such as via the internet. In use, the serial/identification number of the sensor is read and used to look up the calibration information in the database.
  • a problem with this approach is the size of the database and achieving access to it.
  • a method of providing device specific calibration data for a sensor device comprising the steps of providing a sensor device in a region whose environment is to be monitored, the sensor device comprising at least a portion which is responsive to a selected condition of the region, a transmitter portion and a memory portion; storing generic calibration data associated with a group of sensors into which the sensor device falls in a database remote from the sensor device; storing in the memory portion of the sensor device at least correction data for use in modifying the generic calibration data to more accurately fit the actuation calibration data of the sensor device; interrogating the sensor device with an interrogator device to obtain the correction data; retrieving the generic calibration data relating to the sensor device from the database; and modifying the generic calibration data using the correction data to produce sensor device specific calibration data.
  • the present invention further provides a sensor device comprising a portion which is response to a selected environmental variable of a region to be monitored, a transmitter portion and a memory portion, the memory portion storing at least correction data for modifying generic calibration data relating to a group of sensors into which the sensor device falls to produce sensor specific calibration data.
  • a method and sensor device in accordance with the invention has the advantage that it enables accurate calibration data for a sensor to be used in a manner which requires much less data to be stored both locally on the sensor and also in a database accessible by an interrogator than the prior art systems. This reduces the time required for extracting data from the sensor device and also enables the database to be stored more locally to the interrogator, avoiding the access problems associated with the prior art. More particularly, since the generic calibration data is calculate for the or each group and then each sensor is assigned to a group based on its actual calibration data, the data for the group or groups does not change when new sensors are manufactured, and hence does not have the same requirements for constant updating as in the prior art. Accordingly, the calibration coefficients for a particular class of sensor may be hard encoded into an interrogator, making look-up thereby particularly simple and quick.
  • the number of groups used to classify the sensor devices dependents on the accuracy required for the particular sensor application. In some embodiments, it may be acceptable to provide just a single set of generic calibration data which applies for all sensor devices, in which case no separate sensor identification system is required.
  • a plurality of sensor groups are defined, generic calibration data for each group being defined, and each sensor device being classified into a particular group based on the deviation of its actual calibration data from the generic calibration data from the groups, correction data then being calculated based on the difference between the generic calibration data for the group into which the sensor is classified and the actual calibration data for the sensor.
  • Identification means if them also provided on the sensor by means of which the group into which the sensor device has been classified may be read by the interrogator.
  • the method of the invention includes the further steps of storing in a database remote from the sensor device calibration data relating to a plurality of sensor device groups, storing in the memory portion of the sensor device sensor identification data indicative of the sensor group into which the sensor device has been classified, interrogating the sensor device to obtain the identification data, using the identification system to identify the sensor group of the sensor device and retrieving the group specific generic calibration data from the database for the sensor device.
  • the present invention still further provides a method of monitoring at least one condition in an environment, comprising the steps of: providing a sensor for producing an output signal responsive to the at least one condition; locating said sensor in said environment; associating a memory device with the sensor; deriving correction data unique to the sensor for mapping generic calibration data associated with the sensor to fit the specific calibration data of the sensor; storing said correction data in the memory device; reading the correction data using an interrogation device; using the interrogation device to modify the generic calibration data; and using the modified calibration data to process the output signal of the sensor in order to obtain a reading of said condition in the environment.
  • the method further comprises classifying the sensor into a sensor group having associated generic calibration data based on the actual calibration data of the sensor; storing in a database remote from the sensor generic calibration data for each sensor group; storing in the memory device sensor identification data identifying the sensor group into which the sensor has been classified; reading the sensor identification data using the interrogation device; and reading from the database the generic calibration data for the sensor group into which the sensor has been classified.
  • the present invention opens up markets which otherwise were impractical with prior art approaches. It also allows the system designer an additional flexibility when making trade-offs between system read time, system accuracy and system implementation logistics. Such a system would also allow the flexibility to use or not to use the correction factor, so that a system that could not afford the time could either read only some or none of the correction factors. Alternatively, if accuracy requirements were such then the correction factors could be left unused. These changes to the system could all be made through the software without any other reconfiguration.
  • a system in accordance with the invention comprises a sensor such as a SAW tyre pressure and temperature sensor.
  • the sensor has associated with it an identification system such as an RFID tag which stores an electronic indicator which identifies a group into which the particular sensor falls. All the sensors in a particular group share common generic or 'average' set of calibration coefficients, that is the particular calibration coefficients for each sensor fall within a predetermined range of the generic values defined for the particular group.
  • the number of groups will depend on the accuracy required for any particular application and may be a few as one group, in which case no identification system is required.
  • a database is established which records the generic calibration coefficients for each of the groups. This database is stored for access by the system during operation, and may be remotely located and accessible over a network such as the internet.
  • the generic calibration coefficients for the groups represents much less data than the prior art system of storing individual calibration coefficients for all sensors in a database, and hence can advantageously be stored locally to an interrogator, and in particular can be hard encoded therein. Furthermore, since each new sensor which is produced will be classified into an existing group, the database will be fixed and will not, therefore need to be updated as with the prior art system.
  • Each sensor also has a set of correction factors associated with it, which are particular to the individual sensor and are used to adjust the generic calibration coefficients for the group into which the sensor has been placed to more accurately fit the actual calibration coefficients of the particular sensor.
  • correction factors again represent a much smaller amount of data than the actual calibration coefficients and therefore require much less storage space and more importantly much less time to be read by the interrogator in use.
  • the correction data will be stored with the electronic indicator in the identification system.
  • a sensor In use, a sensor is installed in its operating location, such as in a tyre, and an interrogator is located within scanning range of the sensor, for example proximate the wheel arch of a vehicle.
  • the interrogator reads the RFID to download the electronic identifier (if one is present) as well as the correction factors for the sensor.
  • the electronic identifier will, for example, simply be a group number and is used by the interrogator to identify the generic calibration coefficients which apply to the particular sensor.
  • the interrogator looks up the generic calibration coefficients relating to the particular sensor using the electronic identifier and then applies the correction factors, also read from the RFID, using a predefined correction function in order to calculate sensor specific calibration coefficients.
  • Operating data is also read directly from the sensor.
  • this operating data is the resonant frequency of the SAW devices which make up the sensor, and the sensor specific coefficients are then used by the interrogation software in conjunction with the operating data and using pre-defined algorithms to derive the measured environmental information from the sensor, for example the temperature and pressure within the tyre.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Technology Law (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Measuring Fluid Pressure (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)

Abstract

A method of providing device specific calibration data for a sensor device, comprises providing a sensor device is a region whose environment is to be monitored, the sensor device comprising at least a portion which is responsive to a selected condition of the region, a transmitter portion and a memory portion. Generic calibration data associated with a group of sensors into which the sensor device falls is then stored in a database remote from the sensor device, and at least correction data for use in modifying the generic calibration data to more accurately fit the actuation calibration data of the sensor device is stored in the memory portion of the sensor device. The sensor device is interrogated with an interrogator device to obtain the correction data, and the generic calibration data relating to the sensor device is retrieved from the database and modified using the correction data to produce sensor device specific calibration data.

Description

CALLIBRATION COEFFICIENTS FOR SENSOR BASED
MEASUREMENTS
The present invention relates to systems and methods for associating calibration information with sensor devices.
For certain types of sensor such as SAW tyre pressure sensors it is necessary to provide individual calibration data for every sensor manufactured. When the sensor is measured/interrogated frequency information is obtained and using the calibration data and pre-defined algorithm temperature and pressure information can be derived.
Currently there are several methods for handling this data and the procedure for its use. WO2007/005020 discloses a system in which all calibration data is stored on an RFID tag that is kept with the sensor. Prior to interrogating the sensor, the tag is first read to retrieve the calibration coefficients. This system has the drawback, however, that it can take a significant amount of time to read all the required data. When a RFID tag is placed within an environment such as the wheel of a passenger car the read range can be severely effected. Particularly when the vehicle is moving at speed it can become difficult to have a long enough opportunity to read all the required data from the tag.
Another method is to group the sensors so that for a particular application only sensors that fall within a given range will be used and then an ' average' set of calibration coefficients could be used. A problem of this approach is that for some applications that require a high accuracy specification the groups can become very narrow thus making it logistically problematic with a large number of groups or suffer a very poor sensor yield. A third approach, disclosed in EP1659374, is to provide again a RFID with the sensor but storing therein only a serial number/identification number which uniquely identifies the sensor with which it is associated. All applicable sensor coefficients are then stored in a database which may be stored locally to the interrogation electronics or may be stored remotely, being accessed from another onboard system or from an even remoter source such as via the internet. In use, the serial/identification number of the sensor is read and used to look up the calibration information in the database. A problem with this approach, however, is the size of the database and achieving access to it.
According to the present invention there is provided a method of providing device specific calibration data for a sensor device, comprising the steps of providing a sensor device in a region whose environment is to be monitored, the sensor device comprising at least a portion which is responsive to a selected condition of the region, a transmitter portion and a memory portion; storing generic calibration data associated with a group of sensors into which the sensor device falls in a database remote from the sensor device; storing in the memory portion of the sensor device at least correction data for use in modifying the generic calibration data to more accurately fit the actuation calibration data of the sensor device; interrogating the sensor device with an interrogator device to obtain the correction data; retrieving the generic calibration data relating to the sensor device from the database; and modifying the generic calibration data using the correction data to produce sensor device specific calibration data.
The present invention further provides a sensor device comprising a portion which is response to a selected environmental variable of a region to be monitored, a transmitter portion and a memory portion, the memory portion storing at least correction data for modifying generic calibration data relating to a group of sensors into which the sensor device falls to produce sensor specific calibration data.
A method and sensor device in accordance with the invention has the advantage that it enables accurate calibration data for a sensor to be used in a manner which requires much less data to be stored both locally on the sensor and also in a database accessible by an interrogator than the prior art systems. This reduces the time required for extracting data from the sensor device and also enables the database to be stored more locally to the interrogator, avoiding the access problems associated with the prior art. More particularly, since the generic calibration data is calculate for the or each group and then each sensor is assigned to a group based on its actual calibration data, the data for the group or groups does not change when new sensors are manufactured, and hence does not have the same requirements for constant updating as in the prior art. Accordingly, the calibration coefficients for a particular class of sensor may be hard encoded into an interrogator, making look-up thereby particularly simple and quick.
The number of groups used to classify the sensor devices dependents on the accuracy required for the particular sensor application. In some embodiments, it may be acceptable to provide just a single set of generic calibration data which applies for all sensor devices, in which case no separate sensor identification system is required.
In a preferred embodiment, however, a plurality of sensor groups are defined, generic calibration data for each group being defined, and each sensor device being classified into a particular group based on the deviation of its actual calibration data from the generic calibration data from the groups, correction data then being calculated based on the difference between the generic calibration data for the group into which the sensor is classified and the actual calibration data for the sensor. Identification means if them also provided on the sensor by means of which the group into which the sensor device has been classified may be read by the interrogator.
To that end, the method of the invention includes the further steps of storing in a database remote from the sensor device calibration data relating to a plurality of sensor device groups, storing in the memory portion of the sensor device sensor identification data indicative of the sensor group into which the sensor device has been classified, interrogating the sensor device to obtain the identification data, using the identification system to identify the sensor group of the sensor device and retrieving the group specific generic calibration data from the database for the sensor device.
The present invention still further provides a method of monitoring at least one condition in an environment, comprising the steps of: providing a sensor for producing an output signal responsive to the at least one condition; locating said sensor in said environment; associating a memory device with the sensor; deriving correction data unique to the sensor for mapping generic calibration data associated with the sensor to fit the specific calibration data of the sensor; storing said correction data in the memory device; reading the correction data using an interrogation device; using the interrogation device to modify the generic calibration data; and using the modified calibration data to process the output signal of the sensor in order to obtain a reading of said condition in the environment.
Preferably, the method further comprises classifying the sensor into a sensor group having associated generic calibration data based on the actual calibration data of the sensor; storing in a database remote from the sensor generic calibration data for each sensor group; storing in the memory device sensor identification data identifying the sensor group into which the sensor has been classified; reading the sensor identification data using the interrogation device; and reading from the database the generic calibration data for the sensor group into which the sensor has been classified.
The present invention opens up markets which otherwise were impractical with prior art approaches. It also allows the system designer an additional flexibility when making trade-offs between system read time, system accuracy and system implementation logistics. Such a system would also allow the flexibility to use or not to use the correction factor, so that a system that could not afford the time could either read only some or none of the correction factors. Alternatively, if accuracy requirements were such then the correction factors could be left unused. These changes to the system could all be made through the software without any other reconfiguration.
In order that the invention may be well understood, there will now be described an embodiment thereof, given by way of example.
A system in accordance with the invention comprises a sensor such as a SAW tyre pressure and temperature sensor. The sensor has associated with it an identification system such as an RFID tag which stores an electronic indicator which identifies a group into which the particular sensor falls. All the sensors in a particular group share common generic or 'average' set of calibration coefficients, that is the particular calibration coefficients for each sensor fall within a predetermined range of the generic values defined for the particular group. The number of groups will depend on the accuracy required for any particular application and may be a few as one group, in which case no identification system is required. A database is established which records the generic calibration coefficients for each of the groups. This database is stored for access by the system during operation, and may be remotely located and accessible over a network such as the internet. However, the generic calibration coefficients for the groups represents much less data than the prior art system of storing individual calibration coefficients for all sensors in a database, and hence can advantageously be stored locally to an interrogator, and in particular can be hard encoded therein. Furthermore, since each new sensor which is produced will be classified into an existing group, the database will be fixed and will not, therefore need to be updated as with the prior art system.
Each sensor also has a set of correction factors associated with it, which are particular to the individual sensor and are used to adjust the generic calibration coefficients for the group into which the sensor has been placed to more accurately fit the actual calibration coefficients of the particular sensor. These correction factors again represent a much smaller amount of data than the actual calibration coefficients and therefore require much less storage space and more importantly much less time to be read by the interrogator in use. In the preferred embodiment, the correction data will be stored with the electronic indicator in the identification system.
In use, a sensor is installed in its operating location, such as in a tyre, and an interrogator is located within scanning range of the sensor, for example proximate the wheel arch of a vehicle. The interrogator reads the RFID to download the electronic identifier (if one is present) as well as the correction factors for the sensor. The electronic identifier will, for example, simply be a group number and is used by the interrogator to identify the generic calibration coefficients which apply to the particular sensor. The interrogator then looks up the generic calibration coefficients relating to the particular sensor using the electronic identifier and then applies the correction factors, also read from the RFID, using a predefined correction function in order to calculate sensor specific calibration coefficients.
Operating data is also read directly from the sensor. In the preferred embodiment, this operating data is the resonant frequency of the SAW devices which make up the sensor, and the sensor specific coefficients are then used by the interrogation software in conjunction with the operating data and using pre-defined algorithms to derive the measured environmental information from the sensor, for example the temperature and pressure within the tyre.

Claims

1. A method of providing device specific calibration data for a sensor device, comprising the steps of: providing a sensor device is a region whose environment is to be monitored, the sensor device comprising at least a portion which is responsive to a selected condition of the region, a transmitter portion and a memory portion; storing generic calibration data associated with a group of sensors into which the sensor device falls in a database remote from the sensor device; storing in the memory portion of the sensor device at least correction data for use in modifying the generic calibration data to more accurately fit the actual calibration data of the sensor device; interrogating the sensor device with an interrogator device to obtain the correction data; retrieving the generic calibration data relating to the sensor device from the database; and modifying the generic calibration data using the correction data to produce sensor device specific calibration data.
2. A method according to claim 1 , comprising the further steps of: storing in a database remote from the sensor device calibration data relating to a plurality of sensor device groups; storing in a memory portion of the sensor device sensor identification data indicative of the sensor group into which the sensor device has been classified; interrogating the sensor device to obtain the identification data; using the identification system to identify the sensor group of the sensor device; and retrieving the group specific generic calibration data from the database for the sensor device.
3. A method according to claim 2 wherein the identification data and the modification data are stored in the same memory portion.
4. A method according to any of the preceding claims, wherein the sensor device is a SAW based sensor device.
5. A method according to any of the preceding claims, wherein the database is stored locally to an interrogator for interrogating the sensor device.
6. A method according to claim 5, wherein the database is stored in the interrogator.
7. A sensor device comprising a portion which is response to a selected environmental variable of a region to be monitored, a transmitter portion and a memory portion, the memory portion storing at least correction data for modifying generic calibration data relating to a group of sensors into which the sensor device falls to produce sensor specific calibration data.
8. A sensor device according to claim 7, further including a memory portion storing sensor identification data indicative of a group into which the sensor device has been classified.
9. A sensor device according to claim 8, wherein a single memory portion is provided which stores both the correction data and the sensor identification data.
10. A sensor device according to any of claims 7 to 9, further including a receiver portion for receiving an interrogation signal from an interrogator.
11. A method of monitoring at least one condition in an environment, comprising the steps of: providing a sensor for producing an output signal responsive to the at least one condition; locating said sensor in said environment; associating a memory device with the sensor; deriving correction data unique to the sensor for mapping generic calibration data associated with the sensor to fit the specific calibration data of the sensor; storing said correction data in the memory device; reading the correction data using an interrogation device; using the interrogation device to modify the generic calibration data; and using the modified calibration data to process the output signal of the sensor in order to obtain a reading of said condition in the environment.
12. A method according to claim 10, comprising the further steps of: classifying the sensor into a sensor group having associated generic calibration data based on the actual calibration data of the sensor; storing in a database remote from the sensor generic calibration data for each sensor group; storing in the memory device sensor identification data identifying the sensor group into which the sensor has been classified; reading the sensor identification data using the interrogation device; and reading from the database the generic calibration data for the sensor group into which the sensor has been classified.
13. A method of provided device specific calibration data for a sensor device substantially as herein described.
14. A sensor device substantially as herein described.
15. A method of monitoring at least one condition in an environment substantially as herein described.
PCT/GB2009/051433 2008-10-24 2009-10-23 Callibration coefficients for sensor based measurements WO2010046711A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN2009801421503A CN102203558A (en) 2008-10-24 2009-10-23 Callibration coefficients for sensor based measurements
JP2011532724A JP2012506554A (en) 2008-10-24 2009-10-23 Calibration factor for sensor-based measurements
EP09774916A EP2370788A2 (en) 2008-10-24 2009-10-23 Callibration coefficients for sensor based measurements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0819605.7 2008-10-24
GB0819605A GB2464734A (en) 2008-10-24 2008-10-24 Providing sensor device specific calibration coefficients for sensor based measurements

Publications (2)

Publication Number Publication Date
WO2010046711A2 true WO2010046711A2 (en) 2010-04-29
WO2010046711A3 WO2010046711A3 (en) 2011-06-16

Family

ID=40133827

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2009/051433 WO2010046711A2 (en) 2008-10-24 2009-10-23 Callibration coefficients for sensor based measurements

Country Status (6)

Country Link
EP (1) EP2370788A2 (en)
JP (1) JP2012506554A (en)
CN (1) CN102203558A (en)
GB (1) GB2464734A (en)
TW (1) TW201026526A (en)
WO (1) WO2010046711A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10054534B1 (en) 2015-07-08 2018-08-21 Airviz Inc. Group calibration of environmental sensors
US10145827B2 (en) 2013-03-13 2018-12-04 Aclima Inc. Distributed sensor system with remote sensor nodes and centralized data processing

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012052599A1 (en) 2010-10-22 2012-04-26 Upm Rfid Oy Advanced functionality of remote-access devices
EP3518202B1 (en) * 2013-03-13 2021-04-28 Aclima Inc. Distributed sensor system with remote sensor nodes and centralized data processing
EP3008501B1 (en) 2013-06-11 2019-10-16 Signify Holding B.V. A method of calibrating a sensor
DE102015001500A1 (en) * 2015-02-05 2016-08-11 Hella Kgaa Hueck & Co. Method for calibrating at least one sensor, in particular a pressure sensor, with at least one signal-conducting connection to at least one signal converter
CN105258847B (en) * 2015-10-08 2018-12-25 歌尔股份有限公司 A kind of method and apparatus of pressure sensor calibration
JP6777817B2 (en) * 2016-10-19 2020-10-28 プロセク ソシエテ アノニム Methods and devices for compensating for non-uniformity in ultrasonography
DE102019109197A1 (en) * 2019-04-08 2020-10-08 Endress+Hauser Conducta Gmbh+Co. Kg Method for correcting measurement data of an analysis sensor and analysis sensor with correction of measurement data
CN113566873B (en) * 2021-09-24 2022-01-07 湖南沪科制造有限公司 Full-automatic detection equipment for sensor performance

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1659374A1 (en) * 2004-11-12 2006-05-24 Societe de Technologie Michelin Centralized calibration coefficients for sensor based measurements.
EP1818012A1 (en) * 2006-02-09 2007-08-15 Biosense Webster, Inc. Two-stage calibration of medical probes

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5929333A (en) * 1994-01-18 1999-07-27 Cambridge Accusense, Inc. Flow rate and direction measurement system
DE19713367C1 (en) * 1997-03-29 1998-06-25 Draegerwerk Ag Measuring head for gas measuring device with separate heads
US6775632B1 (en) * 1999-12-14 2004-08-10 The Goodyear Tire & Rubber Company Calibration of a transponders for a tire pressure monitoring system
JP3777169B2 (en) * 2003-05-16 2006-05-24 住友ゴム工業株式会社 Initial correction coefficient calculation device and method, and initial correction coefficient calculation program
GB2411960B8 (en) * 2004-03-11 2006-11-30 Transense Technologies Plc Method and apparatus for electronic storing of calibration/identification data for a wirelss linear passive sensor
JP2006008086A (en) * 2004-05-28 2006-01-12 Alps Electric Co Ltd Tire information detecting device
US7630848B2 (en) * 2005-05-25 2009-12-08 Foss Analytical A/B Analysis system and method implementing distributed processing
ATE450024T1 (en) * 2005-06-29 2009-12-15 Michelin Rech Tech RFID FOR STORING SAW CALIBRATION COEFFICIENTS
JP4883555B2 (en) * 2005-10-04 2012-02-22 独立行政法人産業技術総合研究所 Oscillation control device and synchronization system
US7570157B2 (en) * 2005-10-24 2009-08-04 Ford Global Technologies, Llc Method and apparatus for adjusting the pressure sensor measurement range in a tire pressure monitoring system
CN101017601A (en) * 2006-12-08 2007-08-15 天津大学 A system used for electric-controlled vehicle radio remote monitoring, marking and failure diagnosis
FR2910962B1 (en) * 2007-01-03 2009-03-06 Michelin Soc Tech CALIBRATION METHOD FOR SAW SENSORS
GB2455587A (en) * 2007-12-12 2009-06-17 Transense Technologies Plc Calibrating an individual sensor from generic sensor calibration curve and set of measurements from the individual sensor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1659374A1 (en) * 2004-11-12 2006-05-24 Societe de Technologie Michelin Centralized calibration coefficients for sensor based measurements.
EP1818012A1 (en) * 2006-02-09 2007-08-15 Biosense Webster, Inc. Two-stage calibration of medical probes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10145827B2 (en) 2013-03-13 2018-12-04 Aclima Inc. Distributed sensor system with remote sensor nodes and centralized data processing
US10054534B1 (en) 2015-07-08 2018-08-21 Airviz Inc. Group calibration of environmental sensors

Also Published As

Publication number Publication date
GB0819605D0 (en) 2008-12-03
TW201026526A (en) 2010-07-16
JP2012506554A (en) 2012-03-15
CN102203558A (en) 2011-09-28
EP2370788A2 (en) 2011-10-05
WO2010046711A3 (en) 2011-06-16
GB2464734A (en) 2010-04-28

Similar Documents

Publication Publication Date Title
EP2370788A2 (en) Callibration coefficients for sensor based measurements
US20090055120A1 (en) Calibration coefficients for sensor based measurements
US7586412B2 (en) Wireless tag, wireless tag reader/writer, wireless tag information provision method, and wireless tag system
KR100678441B1 (en) Radio ic tag reader writer, radio ic tag system, and radio ic tag data writing method
US10665039B2 (en) Distributed monitoring and control of a vehicle
EP1870788B1 (en) Remote trouble-shooting
US20070222568A1 (en) System and method for vehicle tire usage information
US6018993A (en) Method for monitoring tire pressure
US11321399B1 (en) Systems and methods for asset type fingerprinting and data message decoding
JP2006153870A (en) Central control of calibration coefficient for measurement using sensor
EP3184329A1 (en) Integrated tpms module and rfid tag data sharing system in a tire
US10611197B2 (en) Method of building vehicle data in tire pressure diagnosis tool
EP3388990A1 (en) Engine health and life cycle tracking system
US11588664B2 (en) Systems and methods for data message decoding and asset type fingerprinting
US11757676B2 (en) Systems and methods for asset type fingerprinting and data message decoding
US20220203784A1 (en) Tire temperature analysis methods and systems
EP3423295A1 (en) Wheel unit, system for transmitting data from a wheel unit, and method for transmitting data from a wheel unit
US20080117028A1 (en) Rfid assisted calibration system
US10697821B2 (en) Weight calibration for a vehicle weight load determination meter
CN114103562A (en) Tire pressure monitoring system
EP4064652A1 (en) Systems and methods for asset type fingerprinting and data message decoding
CN114923623A (en) Dynamic compensation method of silicon resonance pressure sensor
CN114407585A (en) Tire pressure sensor address writing method and device, electronic equipment and storage medium
KR102568012B1 (en) Cloud system using electronic devices installed on tires and service method thereof
US20230251283A1 (en) Dynamic multi-stage air data probe prognostics health monitoring system

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200980142150.3

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09774916

Country of ref document: EP

Kind code of ref document: A2

WWE Wipo information: entry into national phase

Ref document number: 2011532724

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2009774916

Country of ref document: EP