Understand the Principles and Application Scope of Infrared Thermometers
Infrared thermometers are widely used in power systems, primarily for remote temperature measurement of transmission and substation line connections and electrical equipment joints in substations. They are also used in other industries for non-contact temperature measurement of various object surfaces.
Principle of Infrared Thermometers
The temperature measurement principle of infrared thermometers involves converting the radiant energy of infrared rays emitted by an object (such as molten steel) into an electrical signal. The magnitude of the infrared radiant energy corresponds to the object's temperature (e.g., molten steel). By measuring the strength of the electrical signal, the object's temperature can be determined.
Types of Infrared Thermometers
Infrared thermometers are divided into two categories: handheld infrared thermometers and online infrared thermometers. Remote infrared thermometers are specialized instruments designed to measure the temperature of small targets from a distance.
1. Handheld Infrared Thermometers
Working Principle:
Handheld infrared thermometers operate by converting the radiant energy of infrared rays emitted by an object into an electrical signal, with the energy level directly corresponding to the object's temperature. The electrical signal is then processed to determine the object's temperature (e.g., molten steel).
Components:
They consist of an optical system, photoelectric detector, signal amplifier, signal processing unit, and display/output module.
Advantages and Applications:
Handheld infrared thermometers are portable, fast, and versatile, widely used in healthcare and equipment fault diagnosis.
Key Considerations for Purchase:
When selecting a handheld infrared thermometer, focus on performance indicators (e.g., temperature range, spot size, operating wavelength, measurement accuracy, response time), ease of use, maintenance and calibration capabilities, and cost.
2. Online Infrared Thermometers
Function:
Online infrared thermometers are effective tools for detecting and diagnosing faults in electronic equipment.
Varieties and Industrial Applications:
Fixed-type infrared thermometers come in multiple models, each playing a critical role in specific industries. Their main performance indicators include spectral response, response time, repeatability, and emissivity.
Industrial Applications:
They are used in industries such as glass and ceramics, paper and packaging, kiln temperature monitoring, and chemical engineering to measure the temperature of instruments and equipment, monitor operational status, and ensure normal equipment operation.
