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Data carrier having indication means for indicating a change of a parameter influencing the data carrier

A technology of data carrier and parameter change, applied in the direction of using electrical devices, thermometers with physical/chemical changes, thermometers with electrical/magnetic components directly sensitive to heat, etc. question

Inactive Publication Date: 2009-06-24
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This known data carrier has a problem, that is, if the ambient temperature is higher than the threshold temperature and the passive data carrier is powered at this time, the maximum temperature measuring switch cannot be used to clearly determine whether this type of temperature change has occurred in the past, since this can only be done intermittently depending on the ambient temperature. When This is less critical when applied to vehicle tires, since vehicle tires are almost always able to cool down to their starting temperature after a run where this type of temperature change can occur
In other cases, however, the above facts can have very unfavorable consequences.

Method used

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  • Data carrier having indication means for indicating a change of a parameter influencing the data carrier
  • Data carrier having indication means for indicating a change of a parameter influencing the data carrier
  • Data carrier having indication means for indicating a change of a parameter influencing the data carrier

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Embodiment Construction

[0032] figure 1 Shown in is a passive data carrier for contactless communication, which data carrier has a circuit 2 for implementing indicating means 3 for indicating the change of an environmental parameter of the data carrier 1 relative to a threshold value of the environmental parameter , the at least one threshold separates the first environmental parameter range and the second environmental parameter range.

[0033] In this case, the data carrier is used in a vehicle tire, in which case the ambient temperature constitutes an ambient parameter and the temperature threshold constitutes an ambient threshold, which means that the indicating device is used to indicate the change in ambient temperature relative to the threshold temperature. Data carrier 1 is used in vehicle tires to detect any situation where the maximum temperature value of 120°C is exceeded. This maximum temperature value of 120°C therefore constitutes a threshold temperature. Therefore, the first temperatur...

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Abstract

In a data carrier (1) having an electric circuit (2) through which are implemented indicating means (3) which can be used to determine parameters affecting the data carrier (1) relative to Whether there is a change in at least one threshold separating the first parameter range from the second parameter range, the device is designed to permanently indicate the change after a first said change has occurred.

Description

technical field [0001] The invention relates to a data carrier having a circuit, with the help of which it is possible to implement an indicating device for indicating the change of a parameter affecting the data carrier relative to a threshold value of the parameter, which threshold value will be the first The parameter scope and the second parameter scope are separated. [0002] The invention further relates to a circuit for a data carrier, with the aid of which an indicating device can be implemented for indicating a change of a parameter affecting the data carrier relative to a threshold value of the parameter, the threshold value will be The first parameter range and the second parameter range are separated. [0003] The invention further relates to a determination method for determining whether a parameter affecting a data carrier has changed, the change of the parameter being determined relative to a threshold value of the parameter, the threshold value separating the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/06G01K5/62G01K1/02G01K1/08G01K7/36G08C19/00
CPCG01K11/06G01K5/62
Inventor M·布赫伦
Owner NXP BV
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