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<p>The article considers the aspects of practical implementation of the non-contact temperature measurement techniques as applied to objects subjected to heating in microwave electromagnetic fields. Non-contact temperature measurements play a&#xa0;major role in ensuring the quality of the heat-treated products. The authors justify advantages of using pyrometry as opposed to thermocouples when performing the temperature measurements under the high-intensity electromagnetic field conditions. A&#xa0;technical implementation of a&#xa0;device for continuous non-contact temperature measurement of the objects subjected to heating in microwave electromagnetic fields is proposed. The device represents a&#xa0;below-cutoff waveguide provided with fasteners and an enclosed portable single-zone infrared sensor of the MLX90614 family. The emissivity of the measured object can be programmed into the sensor, and the information about the object temperature can be transmitted using one of two digital protocols, which makes it possible to make such sensor a&#xa0;part of the control system responsible for operating a&#xa0;microwave processing unit. The authors demonstrate the possibility of using the proposed temperature measurement device in conveyor-type microwave heating systems by building a&#xa0;network of several dozen measuring sensors on a&#xa0;single two-wire digital data bus. The main advantages of the device for continuous non-contact measurement of temperature of the objects subjected to microwave heating include compactness, versatility (the proposed device can be used in all types of microwave heating devices), and low cost.</p>

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Compact non-contact temperature measurement device for use under the high-intensity microwave electromagnetic field conditions

  • 期刊论文

  • 发表日期：

    2025年1月1日

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  • A. V. Mamontov,
  • V. N. Nefedov,
  • S. A. Khritkin

摘要

The article considers the aspects of practical implementation of the non-contact temperature measurement techniques as applied to objects subjected to heating in microwave electromagnetic fields. Non-contact temperature measurements play a major role in ensuring the quality of the heat-treated products. The authors justify advantages of using pyrometry as opposed to thermocouples when performing the temperature measurements under the high-intensity electromagnetic field conditions. A technical implementation of a device for continuous non-contact temperature measurement of the objects subjected to heating in microwave electromagnetic fields is proposed. The device represents a below-cutoff waveguide provided with fasteners and an enclosed portable single-zone infrared sensor of the MLX90614 family. The emissivity of the measured object can be programmed into the sensor, and the information about the object temperature can be transmitted using one of two digital protocols, which makes it possible to make such sensor a part of the control system responsible for operating a microwave processing unit. The authors demonstrate the possibility of using the proposed temperature measurement device in conveyor-type microwave heating systems by building a network of several dozen measuring sensors on a single two-wire digital data bus. The main advantages of the device for continuous non-contact measurement of temperature of the objects subjected to microwave heating include compactness, versatility (the proposed device can be used in all types of microwave heating devices), and low cost.