What Is A Thermographic Survey In Construction?
What Is A Thermographic Survey In Construction?
A thermographic survey in construction is a diagnostic tool used to detect potential building problems, such as water penetration, heat or cooling loss, and blockages in plumbing systems.
It uses infrared video and still cameras to measure surface temperatures and create images (called thermograms) that show surface heat variations.
Thermographic surveys can be quantitative or qualitative, internal or external, and are often used in conjunction with a visual evaluation.
Thermographic surveys can help identify problems such as thermal defects and air leakage in building envelopes, insulation effectiveness, and the integrity of the building fabric including continuity of insulation and avoidance of thermal bridging.
They can also be used to improve energy efficiency in building design and identify problem areas that require maintenance before they cause damage to equipment.
What Is The Purpose Of A Thermograph?
The purpose of thermography is to measure temperature and detect thermal defects in a variety of applications.
It can be used to detect heat losses and air leakage in building envelopes, as well as faulty thermal insulation in order to improve the efficiency of heating and air conditioning units.
Thermography can also be used for plant maintenance procedures, collecting thermal images of relevant machine parts to detect potential faults for repair. Additionally, thermography is used in medical applications such as physiotherapy and military use.
Thermal imaging cameras are the most accurate thermographic inspection device, producing a 2-dimensional thermal picture of an area showing heat leakage.
What Is The Main Advantage Of Using Thermography In The Inspection?
The main advantage of using thermography in inspection is that it can scan large areas quickly and without the need for destructive testing. This makes it a cost-effective and time-saving alternative to other non-destructive testing techniques such as ultrasonic testing.
Additionally, thermography is risk-free as it does not emit any radiation, making it a safe option for inspecting materials.
Thermography can also be used for condition monitoring, which helps to detect heat-related problems and thermal anomalies. Furthermore, infrared thermography can be used to detect defects more precisely when the activation of the test object is done in a pulsed mode.
This makes it an effective tool for detecting faults that may not be visible with other methods. Finally, thermography can be used to assess tree health without being invasive, making it a useful tool for environmental monitoring.
What Are The Disadvantages Of Using Thermography?
The main disadvantages of using thermography are the high cost of thermo-imaging equipment, difficulty obtaining accurate data from models with less thermophysical and radiometric properties, and the influence of weather conditions on the accuracy of thermal imaging.
Additionally, basic training in the use of a thermal imaging camera is not enough to make someone a thermographer, and there is currently a lack of regulation in this field.
What Are The Types Of Thermography?
There are two types of thermography: passive thermography and active thermography. Passive thermography involves pointing a camera at the test piece and constructing a temperature map from the thermal image.
Active thermography involves heating the surface of the object rapidly using an external heat source and observing how the temperature decays with time.
Examples of external heat sources used in active thermography include halogen lamps, various techniques for active thermography, and infrared cameras or other devices for measuring the temperature of a surface.