Device and method for heating materials based on high-power laser

Abstract

The invention discloses a device and method for heating materials based on a high-power laser. The device includes a laser heating mechanism and a temperature measurement and temperature control mechanism; the laser heating mechanism includes a heating source assembly, a sample support assembly and a chiller. The sample support assembly consists of a sample It is composed of a switchable sample stage for placing samples. The switchable sample stage is composed of a sample support table and a radiation transduction plate; the heating source assembly includes a driving power supply, a laser, a beam shaper, a laser alignment platform and a chiller; the chiller The water inlet and water outlet of the laser are respectively connected with the water outlet and water inlet of the laser, and the air pump is connected with the beam shaper; the temperature measurement and temperature control mechanism includes a thermal imager, a two-color pyrometer and a thermocouple, and the thermocouple for adjusting the position of the thermocouple is fixed and rotated Mechanism and PLC controller. The invention can locally heat the material whose chemical composition is not fixed and the laser absorption rate is not fixed, or heat a small-area sample to measure and control the temperature continuously and accurately in real time.

Description

technical field [0001] The invention belongs to the technical field of material heating, and relates to a laser heating device and method, in particular to a device for locally heating or heating a small-area sample by using a high-power laser for materials whose chemical composition is not fixed and the laser absorptivity is not fixed. method. Background technique [0002] In recent years, due to the rapid development of my country's aerospace industry, there is a great demand for the testing and research of material thermophysical properties. The development of new ultra-high temperature materials is to a certain extent the prerequisite for many high-tech breakthroughs. Typical aerospace materials, such as thermal and ablation resistant composite materials, gradient functional composite materials, etc., need to be tested for thermal and physical properties of materials under ultra-high temperature conditions. [0003] To measure some thermal properties of materials at ult...

AI Technical Summary

Problems solved by technology

Using thermocouples will not be able to achieve continuous temperature measurement, and the operation is very cumbersome

In addition, the thermocouple may be disconnected due to various reasons, so that the temperature measuring instrument cannot work normally. If it cannot be found in time, the experiment will inevitably fail.

[0006] Using a high-power laser for heating, if the laser power cannot be precisely controlled, it will directly affect the heating rate, resulting in low temperature control accuracy and short power stabilization time, which will affect the accuracy of the experimental results

For example, patent CN103234804A discloses a high-power non-contact laser heating device, but it does not propose a heating method for materials with low absorption rate, and only using thermocouples cannot achieve continuous temperature measurement and temperature control in the entire temperature zone. The temperature measuring device needs to be replaced according to the required heating temperature

Using a high-power laser as a heating source, if the temperature measuring element is moved frequently, it is easy to damage the temperature measuring element, resulting in inaccurate temperature measurement results and potential safety hazards in personnel operation

For example, patent CN102540340A discloses a laser heating source with controllable temperature zone, which is not suitable for ultra-high temperature experimental environment, and lacks a device for temperature measurement and temperature control

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