US 12,253,418 B2
Method for in-situ measurement of temperature at microwave-induced microscopic hot spots, temperature measuring particles and the device used
Xin Gao, Tianjin (CN); Zhenyu Zhao, Tianjin (CN); and Hong Li, Tianjin (CN)
Assigned to Tianjin University, Tianjin (CN)
Filed by Tianjin University, Tianjin (CN)
Filed on Jul. 26, 2022, as Appl. No. 17/874,201.
Application 17/874,201 is a continuation of application No. PCT/CN2022/098046, filed on Jun. 10, 2022.
Prior Publication US 2023/0125349 A1, Apr. 27, 2023
Int. Cl. G01K 11/20 (2006.01); G01K 11/32 (2021.01)
CPC G01K 11/20 (2013.01) [G01K 11/32 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An in-situ measuring device for temperature at microscopic hot spot induced by microwave, comprising a microwave generator and a supporting rectangular waveguide, a transition waveguide, a cylindrical microwave interception structure, an optical fiber thermometer, a single-mode microwave cavity, an ultraviolet lamp, a fluorescence spectrometer, a quartz sample tank and an adjustable short-circuit piston; the single-mode microwave cavity is arranged along a horizontal direction, and the single-mode microwave cavity is hollow with openings at both ends, one horizontal end of the single-mode microwave cavity is closely communicated with the microwave generator and the supporting rectangular waveguide through the transition waveguide, and the other horizontal end of the single-mode microwave cavity is connected with the adjustable short-circuit piston through the transition waveguide, wherein the adjustable short-circuit piston is capable of adjusting the stagnation point position in the microwave cavity;
a top side and a longitudinal side of the single-mode microwave cavity are provided with openings, an opening on the top side of the single-mode microwave cavity is connected with the ultraviolet lamp, the cylindrical microwave interception structure is closely arranged between the opening on the top side of the single-mode microwave cavity and the ultraviolet lamp, and the fluorescence spectrometer is connected with an opening on the longitudinal side of the single-mode microwave cavity, and the cylindrical microwave interception structure is closely arranged between the opening on the longitudinal side of the single-mode microwave cavity and the fluorescence spectrometer;
the quartz sample tank is arranged at a center of the single-mode microwave cavity, a side of the quartz sample tank is arranged facing a microwave front opening of the microwave generator, and the quartz sample tank is configured to hold liquid materials; and
the optical fiber thermometer is configured to be inserted into the quartz sample tank and monitor a sample body temperature in a liquid sample in the quartz sample tank in real time.