The detection technology of IR thermography camera has been widely used in the engineering field due to its advantages such as fast, non-contact, and intuitive detection results. Practice has proved that compared with traditional methods, infrared diagnosis technology is easier to find the internal and external defects of the elevator in time, greatly improving the work efficiency, avoiding blindness in the detection, and playing a positive role in ensuring the safe operation of the elevator.
Ⅰ. IR thermography camera in elevator electrical inspection
If there is a virtual connection in the electrical circuit, the contact between the local conductors is poor, and the circuit has high resistance locally. The increase in the unit current here will cause the temperature at this place to be greater than other nearby parts. These can be detected by an IR thermography camera.
Ⅱ. Elevator energy-saving detection with IR thermography camera
It is necessary and meaningful to monitor and evaluate the energy efficiency of elevators. During the operation of the elevator, a considerable part of the energy is lost in the form of thermal energy. By measuring the temperature distribution of each component of the elevator and the temperature value of the main components, the electrical energy consumption of each component of the elevator can be obtained, and then its energy consumption can be planned to achieve The purpose of energy saving.
Ⅲ. IR thermography camera in elevator control cabinet temperature detection
When the elevator is working, the control cabinet takes on the functions of power frequency conversion output and signal control, and emits a large amount of heat energy. For individual elevators that require energy consumption braking, the heat dissipation of the control cabinet is more considerable. For a large number of control chips inside the control cabinet, their lifespan is greatly affected by temperature, and the lifespan is reduced by half for every 10°C increase in temperature.
Using IR thermal imaging camera to detect the internal temperature distribution of the elevator control cabinet, measure the temperature of the modules and high-temperature components in the control cabinet, and find out the weak points, which can improve the elevator heating and heat dissipation design and improve the elevator thermal stress tolerance level. At the same time, it also helps to improve the working condition of the elevator and the thermal conditions of the working environment, and timely take heat dissipation measures to ensure the safe operation of the elevator.
Ⅳ. Detection of abnormal heating of IR thermography camera
The elevator traction machine is an important part of the elevator. The infrared method as a rapid screening method has been proved to be very effective. High resistance, abnormal current and excessive friction will all generate a lot of heat. The abnormal thermal signal detected by the infrared thermal imaging camera can point out the location and nature of the problem.
Ⅴ. IR thermography camera lubricating oil level inspection
Since lubricating oil has a large heat capacity and is susceptible to convective heat transfer, it usually takes the longest time to change temperature. Through the inspection of the liquid level, the lubricating oil level can be effectively detected. It should be pointed out that the thickness of the sludge on the inner wall using this method may have an impact on the test results, but it can also show the oil and grease on the inner wall by this method.
Ⅵ. Ambient temperature detection in the computer room of the IR thermography camera
In order to ensure the normal operation of the equipment in the equipment room, the ambient temperature in the equipment room should be kept between 5 and 40°C if the heat emitted by the equipment is considered. If the pulley room is equipped with electrical equipment, the ambient temperature is the same as the requirements of the machine room. According to the elevator heat-resistant design specifications and the temperature allowable range, infrared thermal imaging camera detection can point out the thermal temperature problems in the elevator use process, as well as the parts that cannot meet the requirements; it can be used for energy detection in the machine room, and can be checked out Insulation materials used in the computer room are missing, damaged, or ineffective, check the temperature rise caused by the opening of the computer room window facing the sun; detect abnormal temperature due to air convection (such as air leakage).
Ⅶ. Humidity detection in the computer room of the IR thermography camera
Elevator manufacturing and installation safety regulations stipulate that the machine room should be properly ventilated. At the same time, it must be considered that the hoistway is ventilated through the machine room. The stale air drawn from other parts of the building must not be directly discharged into the machine room. Protection such as motors, equipment and cables make them as safe as possible from dust, harmful gases and moisture. Due to many reasons such as design, installation, maintenance and so on, the roof has leaked within one or two years. The reasons for the leakage are more complicated and potentially the long-term cost is high. Because water has a high heat capacity, the temperature changes very slowly in the heat flow cycle. The sun heats up the roof during the day, and the roof begins to cool down after sunset. Dry insulation materials are cooler than wet materials. Positioning and replacement can greatly extend the life of the building and avoid moisture damage.
