Temperature measuring device and temperature measuring method

Abstract

The present invention provides a temperature measuring device and a temperature measuring method that can easily measure the temperature of an object. [Solution] A temperature measuring device according to one embodiment measures the temperature of a measurement area on which magnetic particles are arranged. This temperature measuring device comprises a measurement unit including a magnetic field generating unit that applies an external magnetic field whose magnetic field strength changes over time to the measurement area, a receiving unit that detects a magnetic signal including a magnetization response signal that shows the magnetization response of magnetic particles to the external magnetic field, and an analysis unit that analyzes the magnetic signal to obtain the temperature of the measurement area.

Claims

1. A temperature measuring device for measuring the temperature of a measurement area in which magnetic particles are arranged, A measurement unit including a magnetic field generating unit that applies an external magnetic field whose magnetic field strength changes over time to the measurement area, and a receiving unit that detects a magnetic signal including a magnetization response signal that indicates the magnetization response of the magnetic particles to the external magnetic field, An analysis unit analyzes the magnetic signal and obtains the temperature of the measurement area, A temperature measuring device equipped with the following features.

2. The temperature measuring device according to claim 1, wherein the analysis unit generates a magnetic field strength-signal strength curve showing the relationship between a parameter related to the magnetic field strength of the external magnetic field and a parameter related to the strength of the magnetization response signal, based on the magnetic signal, and obtains the temperature of the measurement area based on the shape of the magnetic field strength-signal strength curve.

3. The system includes a storage unit that stores the magnetic field strength-signal strength curve related to a reference magnetic particle having a predetermined temperature, The temperature measuring device according to claim 2, wherein the analysis unit obtains the temperature of the measurement area based on the correlation between the magnetic field strength-signal strength curve related to the magnetic particle and the magnetic field strength-signal strength curve related to the reference magnetic particle.

4. The temperature measuring device according to claim 1, wherein the external magnetic field has a magnetic field strength of 1 kA / m to 30 kA / m and a frequency of 0.1 kHz to 300 kHz.

5. A reference unit including a magnetic field generating unit that applies the external magnetic field to a reference region where the magnetic particles are not arranged, and a receiving unit that detects a reference signal indicating the strength of the external magnetic field that has passed through the reference region, A processing unit that acquires a difference signal indicating the difference between the magnetic signal and the reference signal, Furthermore, The temperature measuring device according to claim 2, wherein the analysis unit generates the magnetic field strength-signal strength curve based on the difference signal.

6. A reference unit comprising: a magnetic field generating unit that applies the external magnetic field to a reference region on which reference magnetic particles are arranged; and a receiving unit that detects a reference signal including a magnetization response signal indicating the magnetization response of the reference magnetic particles to the external magnetic field; A processing unit that acquires a difference signal indicating the difference between the magnetic signal and the reference signal, Furthermore, The temperature measuring device according to claim 1, wherein the analysis unit obtains the temperature of the magnetic particles based on the difference signal.

7. The system further includes a temperature adjustment unit for adjusting the temperature of the reference magnetic particles, The processing unit acquires the difference signal while changing the temperature of the reference magnetic particle using the temperature adjustment unit. The temperature measuring device according to claim 6, wherein the analysis unit identifies the temperature of the reference magnetic particle at which the difference signal is minimized, and determines the identified temperature as the temperature of the measurement area.

8. A drive unit for moving the measuring unit in a two-dimensional direction relative to the measurement area, An image generation unit that generates a temperature distribution image showing the temperature distribution of the measurement area, Equipped with, The analysis unit acquires the temperature of the measurement area at each position of the measurement unit, The temperature measuring device according to claim 1, wherein the image generation unit generates the temperature distribution image based on the temperature of the measurement area at each acquired position.

9. The temperature measuring device according to claim 8, wherein the image generation unit generates a plurality of temperature distribution images showing the temperature distribution of the measurement area viewed from different angles, including the temperature distribution image, and generates a three-dimensional image showing the temperature distribution of the measurement area from the plurality of temperature distribution images.

10. A temperature measurement method for measuring the temperature of a measurement area in which magnetic particles are arranged, The steps include applying an external magnetic field to the measurement area, the magnetic field strength of which changes over time, The steps include detecting a magnetic signal that includes a magnetization response signal indicating the magnetization response of the magnetic particles to the external magnetic field, The steps include analyzing the magnetic signal to obtain the temperature of the measurement area, A method for measuring temperature, including the following.

11. The temperature measurement method according to claim 10, wherein the step of obtaining the temperature of the measurement area includes generating a magnetic field strength-signal strength curve based on the magnetic signal, which shows the relationship between a parameter related to the magnetic field strength of the external magnetic field and a parameter related to the strength of the magnetization response signal, and obtaining the temperature of the measurement area based on the shape of the magnetic field strength-signal strength curve.

12. The process further includes the step of storing the magnetic field strength-signal strength curve associated with a reference magnetic particle having a predetermined temperature, The temperature measurement method according to claim 11, wherein the step of obtaining the temperature of the measurement area includes the step of obtaining the temperature of the measurement area based on the correlation between the magnetic field strength-signal strength curve associated with the magnetic particle and the magnetic field strength-signal strength curve associated with the reference magnetic particle.

13. The temperature measurement method according to claim 10, wherein the external magnetic field has a magnetic field strength of 1 kA / m to 30 kA / m and a frequency of 0.1 kHz to 300 kHz.

14. The steps include applying the external magnetic field to a reference region where the magnetic particles are not located, The steps include detecting a reference signal indicating the strength of the external magnetic field that has passed through the reference region, A step of acquiring a difference signal that shows the difference between the magnetic signal and the reference signal, It further includes, The temperature measurement method according to claim 11, wherein the step of acquiring the temperature of the measurement area includes the step of generating the magnetic field strength-signal strength curve based on the difference signal.

15. The steps include applying the external magnetic field to a reference region where reference magnetic particles are arranged, The steps include detecting a reference signal that includes a magnetization response signal showing the magnetization response of the reference magnetic particle to the external magnetic field, A step of acquiring a difference signal that shows the difference between the magnetic signal and the reference signal, It further includes, The temperature measurement method according to claim 10, wherein the step of obtaining the temperature of the measurement area is to obtain the temperature of the magnetic particles based on the difference signal.

16. The method further includes the step of adjusting the temperature of the reference magnetic particle, The temperature measurement method according to claim 15, wherein the step of acquiring the temperature of the measurement area includes the step of identifying the temperature of the reference magnetic particle at which the difference signal is minimized, and the step of determining the identified temperature as the temperature of the measurement area.

17. The steps include moving the measuring unit, which applies the external magnetic field and detects the magnetic signal, in a two-dimensional direction relative to the measurement area, The steps include generating a temperature distribution image showing the temperature distribution of the measurement area, It further includes, The step of obtaining the temperature of the measurement area includes the step of obtaining the temperature of the measurement area at each position of the measurement unit, The temperature measurement method according to claim 16, wherein the step of generating the temperature distribution image includes the step of generating the temperature distribution image based on the temperature of the measurement area at each acquired location.

18. The temperature measurement method according to claim 17, further comprising the steps of generating a plurality of temperature distribution images showing the temperature distribution of the measurement area viewed from different angles, including the aforementioned temperature distribution image, and generating a three-dimensional image showing the temperature distribution of the measurement area from the plurality of temperature distribution images.

19. The steps include adjusting the position and angle of the measuring unit, which applies the external magnetic field and detects the magnetic signal, with respect to the measuring area, A step of obtaining the direction and distance of the magnetic particles from the measuring unit based on the intensity of the magnetic signal and the position and angle of the measuring unit relative to the measuring area, A step of obtaining positional information of the magnetic particles in three-dimensional space based on the direction and distance of the magnetic particles, The temperature measurement method according to claim 11, including the method described in claim 11.

20. The temperature measurement method according to claim 19, further comprising the step of aligning the irradiation direction of the external magnetic field with the energy rays of an external device that irradiates the target with energy rays to heat the target, and determining whether or not the energy rays are irradiating the target based on the intensity of the magnetic signal.

21. The temperature measurement method according to claim 15, further comprising the step of detecting the difference signal using an analog circuit and adjusting the temperature of the magnetic particle or the reference magnetic particle.

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