Simultaneous Global Thermometry, Barometry, and Velocimetry Systems and Methods

摘要

Microbeads include small preformed microbead substrates, which may comprise, for example, silica particles having a characteristic dimension less than 2 millimeters. A plurality of luminophores are applied to an exposed surface of the microbead substrates, wherein the luminophores are selected for detecting pressure and/or temperature. A plurality of luminophores absorb light at a predetermined wavelength to transition to an excited state, and they luminesce at different wavelengths when returning to the ground state. The luminescence may be phosphorescence or fluorescence. In some embodiments the microbeads include at least one pressure-sensitive luminophore, at least one temperature-sensitive luminophore, and at least one reference luminophore that is neither pressure-sensitive nor temperature-sensitive. In some embodiments the microbeads are configured for use in digital particle image velocimetry.

主权项

1. A microbead comprising:
a preformed microbead substrate having a characteristic transverse dimension of less than two millimeters; and a first luminophore and a second luminophore, wherein the first and second luminophores are applied to an exposed surface of the preformed microbead substrate, and wherein the second luminophore is selected for detecting pressure or temperature; wherein the first and second luminophores absorb light at a predetermined wavelength, the first luminophore luminesces at a first wavelength, and the second luminophore luminesces at a second wavelength that is different from the first wavelength.