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1. EP2458353 - BODY TEMPERATURE MEASURING SYSTEM AND DATA READING DEVICE AS WELL AS RELEVANT DRIVE AND CONTROL METHOD

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[ EN ]
Claims

1. A body temperature measuring system including a body temperature tag including an antenna unit and a processing unit, and a reading device for reading data from the body temperature tag, characterized in that
said processing unit of said body temperature tag comprises:

a power supply circuit connected to said antenna unit to be activated in accordance with generation of an induced electromotive force in said antenna unit;

detection means in which at least two semiconductor temperature sensors are connected parallel to each other, each of said semiconductor temperature sensors being formed by connecting two types of semiconductors including a p-type semiconductor and an n-type semiconductor and detecting a band gap voltage generated when a current is supplied to a connection portion between the two types of semiconductors; and

storage means for storing calibration data to calibrate the band gap voltage detected by said detection means, and

is configured to, upon activating said power supply circuit, send the band gap voltage detected by said detection means to said reading device via said antenna unit together with the calibration data,

said reading device comprises:

excitation means capable of exciting at a predetermined power level; and

sensing means for, when a magnetic field generated by excitation at a first power level by said excitation means has changed due to an influence of said antenna unit, sensing the change in the magnetic field, and

said excitation means is configured to, when said sensing means senses the change in the magnetic field, excite at a second power level that allows to generate, in said antenna unit, the induced electromotive force to activate said power supply circuit.


  2. A data reading device that electromagnetically couples with a body temperature tag including an antenna unit and a processing unit,
said processing unit comprising:

a power supply circuit connected to said antenna unit to be activated in accordance with generation of an induced electromotive force in said antenna unit;

detection means in which at least two semiconductor temperature sensors are connected parallel to each other, each of said semiconductor temperature sensors being formed by connecting two types of semiconductors including a p-type semiconductor and an n-type semiconductor and detecting a band gap voltage generated when a current is supplied to a connection portion between the two types of semiconductors; and

storage means for storing calibration data to calibrate the band gap voltage detected by said detection means, and

being configured to, upon activating said power supply circuit, send the band gap voltage detected by said detection means via said antenna unit together with the calibration data, the device characterized by comprising:

excitation means capable of exciting at a predetermined power level; and

sensing means for, when a magnetic field generated by excitation at a first power level by said excitation means has changed due to an influence of said antenna unit, sensing the change in the magnetic field,

wherein said excitation means is configured to, when said sensing means senses the change in the magnetic field, excite at a second power level that allows to generate, in said antenna unit, the induced electromotive force to activate said power supply circuit.


  3. The system according to claim 1, characterized in that said detection means comprises six to 10 semiconductor temperature sensors and detects an average value of band gap voltages at the connection portions of said semiconductor temperature sensors.
  4. The system according to claim 1, characterized in that said detection means comprises eight semiconductor temperature sensors and detects an average value of band gap voltages at the connection portions of said semiconductor temperature sensors.
  5. The system according to claim 1, characterized in that said detection means detects an average value of band gap voltages when the current is supplied to the connection portion of each semiconductor temperature sensor a plurality of number of times.
  6. The system according to claim 1, characterized in that
said detection means further comprises boost means for boosting the induced electromotive force generated in said antenna unit,
and the current is supplied to the connection portion of each semiconductor temperature sensor based on a voltage boosted by said boost means.
  7. The system according to claim 1, characterized in that said processing unit further comprises stop means for stopping processing performed upon activation of said power supply circuit if a temperature rises upon generation of the induced electromotive force in said antenna unit.
  8. The system according to claim 1, characterized in that said processing unit further comprises switching means for switching the detected band gap voltage to a band gap voltage in a predetermined range.
  9. A driving control method of a data reading device that electromagnetically couples with a body temperature tag including an antenna unit and a processing unit,
the processing unit comprising:

a power supply circuit connected to the antenna unit to be activated in accordance with generation of an induced electromotive force in the antenna unit;

detection means in which at least two semiconductor temperature sensors are connected parallel to each other, each of the semiconductor temperature sensors being formed by connecting two types of semiconductors including a p-type semiconductor and an n-type semiconductor and detecting a band gap voltage generated when a current is supplied to a connection portion between the two types of semiconductors; and

storage means for storing calibration data to calibrate the band gap voltage detected by the detection means, and

being configured to, upon activating the power supply circuit, send the band gap voltage detected by the detection means via the antenna unit together with the calibration data, the method characterized by comprising:

the excitation step capable of exciting at a predetermined power level; and

the sensing step of, when a magnetic field generated by excitation at a first power level in the excitation step has changed due to an influence of the antenna unit, sensing the change in the magnetic field,

wherein in the excitation step, when the change in the magnetic field is sensed in the sensing step, excitation is performed at a second power level that allows to generate, in the antenna unit, the induced electromotive force to activate the power supply circuit.