Non-contact temperature measuring method and device

Abstract

The invention discloses a non-contact temperature measuring method and device. A soft magnetic material is combined with a conductive solenoid to form a soft magnetic component for temperature measurement according to the change relationship (Bs-T or Ms-T curve) that the saturation magnetic induction intensity (Bs) and the saturation magnetization intensity (Ms) of the soft magnetic material monotonously decrease with increasing temperature, the change law of the magnetic induction intensity B of the soft magnetic component in a saturation magnetization state at a specific position with temperature is measured by using a Gauss meter, a correspondence between the B value of the used soft magnetic component used at the specific position and an environment temperature is calibrated, and thenthe temperature measurement of the environment in which the soft magnetic component is placed under a non-contact condition is realized. The present invention also provides the device for achieving the non-contact temperature measurement according to the above method. The invention is suitable for measuring the temperature inside a closed container, a high-pressure container and a container with inconvenient opening and inconvenient connection with a temperature measuring element, the operation is simple, and the precision of temperature measurement is high.

Description

technical field [0001] The invention relates to the technical field of temperature measurement, in particular to a non-contact temperature measurement method and device. Background technique [0002] In many fields such as industry, medical treatment, military affairs and life, temperature monitoring has become one of the important measures for safe production and loss reduction in all walks of life. There are mainly two types of temperature testing equipment: contact type and non-contact type. Generally speaking, contact temperature measuring equipment is relatively simple and has high precision, but the temperature measuring element and the measured medium need to conduct sufficient heat exchange, and there is a phenomenon of temperature measurement delay. At the same time, due to the limitation of high temperature resistant materials, it cannot be applied Measurement of temperature. Non-contact temperature measuring equipment mainly measures temperature through the prin...

AI Technical Summary

Problems solved by technology

The μ-T curve method is mainly used for temperature measurement, but its temperature measurement device is complicated, including excitation coil, temperature measurement induction coil

In the process of temperature measurement, an alternating current needs to be passed in, and the alternating current will generate an alternating magnetic field, which will affect the precision components in the measured environment. It is not suitable for precision instrument measurement and is only suitable for household appliances, such as rice cookers, induction cookers, etc. Wait

[0005] Patent CN102204780B discloses a non-contact temperature measuring rice cooker and a temperature measuring method. The magnetic temperature sensing element is ferromagnet or ferrimagnet, with low Curie temperature and small test range, and it is only suitable for household appliances such as rice cookers.

[0006] Patent CN102207411B discloses a non-contact temperature measurement method. In the temperature measurement process, multiple μ-T curves need to be preset for different frequencies or powers, and the comparison object used in temperature measurement is equal to or equal to the preset one. The closest μ-T curve is converted, resulting in inaccurate temperature measurement and potential safety hazards in industrial production

[0007] It can be seen that there is still a lack of more accurate temperature measurement technology and methods for temperature measurement in airtight containers, high-pressure containers, and containers that are inconvenient to open or connect to temperature measuring elements.

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