A SET FOR CONTACTLESS TEMPERATURE CONTROL, A METHOD OF GENERATING ELECTROMAGNETIC RADIATION WAVEFRONTS AND THE USE OF THE SET TO GENERATE PROFILES OF TEMPERATURE FIELDS

Abstract

A set for controlling the temperature, characterised in that it comprises a source of electromagnetic waves (1), like a laser or a diode, or an ultrasound generator connected by wires to a specialised controller (3) with a microprocessor connected by wires to a thermal radiation detector (2), like a pyroelectric detector or a thermocouple detector, the source of electromagnetic waves and the thermal radiation detector being placed at an angle a between 0 and 180 with respect to each other, and a method for generating the profiles of radiation wavefronts and the use of the set to generate the profiles of temperature fields using the profiles of wavefronts.

Claims

1. A set for controlling the temperature, characterised in that it comprises a source of electromagnetic waves (1), like a laser or a diode, or an ultrasound generator connected by wires to a specialised controller (3) with a microprocessor connected by wires to a thermal radiation detector (2), like a pyroelectric detector or a thermocouple detector, the source of electromagnetic waves and the thermal radiation detector being placed at an angle between 0 and 180 with respect to each other.

2. A method for generating the profiles of electromagnetic radiation wavefronts, characterised in that the shape of the wavefront profile is generated in accordance with the system of electromagnetic radiation sources, by placing the sources of electromagnetic radiation in superposition with respect to each other or by changing the power delivered to the source of electromagnetic radiation, not exceeding the maximum power of the source, or by placing a lens or a system of lenses before the source or sources of electromagnetic waves.

3. The use of the set defined according to claim 1 for generating profiles of temperature fields using profiles of wavefronts generated according to claim 2.

Description

EXAMPLE 1

[0017] FIG. 1. Presents a method for controlling temperature by means of a specialised controller (3) with a microprocessor, at a volume point (with coordinates of x, y, z), wherein the source of radiation (2) may be a laser, a LED diode or a piezoceramic transducer. A detector (1) according to the invention may be a pyroelectric or thermocouple sensor, absorbing radiation in the infrared range where the maximum of thermal radiation is placed.

EXAMPLE 2

[0018] FIG. 2. presents the use of a system of sources for shaping and controlling volumetric and planar temperature fields in spaces and on material surfaces as a function of time by using the superposition of various sources of radiant energy (4, 5, 6).

EXAMPLE 3

[0019] Another embodiment of the invention, presented in FIGS. 3A and 3B, presents a method for generating a field of temperatures by means of controlling the intensity of the individual sources of radiant energy (7, 8, 9) and by adjusting the number of sources. FIG. 3A presents a situation when one of the sources of electromagnetic waves radiates with a higher amplitude, while FIG. 3Bwhen the amplitude of radiation for one of the sources of electromagnetic waves is being reduced (10, 11, 12).

EXAMPLE 4

[0020] Yet another embodiment of the invention enables the use of lenses (14) in order to multiply the effective source of radiant energy (13). By using various kinds of lenses and adjusting the number of radiant energy sources, it is possible to practically form any temperature profile in a volume or on a surface and control it as a function of time (FIG. 4).

EXAMPLE 5

[0021] FIG. 5 presents the value of temperature measured for many points in a transverse cross-section of an irradiated plane as a function of current applied to the source of electromagnetic waves. On the other hand, FIG. 6 presents changes in the measured temperature at a point as a function of time depending on the current applied to the source of electromagnetic waves. FIG. 7 depicts a linear increase in the measured temperature as a function of current flowing through the source of electromagnetic waves.

EXAMPLE 6

[0022] Figures from 8A to 13B present the shapes of temperature profiles on a planar surface for various values of current powering the sources of electromagnetic waves, created as a result of using the method according to the present invention.

EXAMPLE 7

[0023] Figures from 14A to 20B present the shapes of temperature profiles on a planar surface for various values of current powering the sources of electromagnetic waves, created as a result of using the method according to the present invention in a system with a lens.

EXAMPLE 8

[0024] FIG. 21 depicts a linear increase in the measured temperature as a function of current flowing through the source of electromagnetic waves in a system with a lens. On the other hand, FIG. 22 presents changes in the measured temperature at a point as a function of time depending on the current applied to the source of electromagnetic waves in a system with a lens. FIG. 23 presents the value of temperature measured for many points in a transverse cross-section of an irradiated plane as a function of current applied to the source of electromagnetic waves upon placing a lens shaping the profile of the wavefront between the source and the irradiated surface. FIG. 24 presents a comparison of a wavefront modified by means of a lens(.square-solid.) with a wavefront without a lens(.box-tangle-solidup.).

EXAMPLE 9

[0025] FIG. 25 presents a measurement system comprising an MLX90614 detector (15), sources of electromagnetic radiationLZ1-00DB05 diodes, a maximum working current of 1200 mA (16, 17) and a plane irradiated with electromagnetic radiation (18, a plate made of copper and covered with copper oxide) for shaping planar wavefronts.

EXAMPLE 10

[0026] FIG. 26 presents a measurement system comprising an MLX90614 detector (19), a source of electromagnetic radiationa UV diode (20), a lens (21) and a plane irradiated with electromagnetic radiation (a planar plate made of polymer, 22) for shaping the wavefronts by means of a lens.