Infrared sensor
What is an infrared sensor?
An infrared sensor is a light sensitive device, the infrared radiation can gather. This Sensor is not detected, only bare movements, but it also measures the heat that is emitted from an object. Infrared radiation – IR radiation – consists of electromagnetic waves in the range between the for the human eye to visible light and the terahertz radiation. An infrared sensor detects and measures radiation, whose wavelength is below the visible range.
What forms of infrared sensors are there?
There are two basic forms:
- Passive infrared Sensors, the infrared beams, only receive.
- Active IR Sensors generate heat radiation
Where are infrared sensors used?
Infrared sensors are used, for example, at the outside entrances of buildings, where you have about the lighting of entrances, or Due to automatically turn on. So you can react, for example, if a Person or vehicle enters the monitored area. The infrared sensor is connected to an alarm system, it can report the unauthorized intruders. Such models are used in security systems.
How does an infrared sensor?
In most of the Sensor models, the infrared receiving radiation from the Sensor through an Opening in the front of the measuring device. In the middle of the device, the Sensor is itself. In case it is protected against electromagnetic radiation. It is also possible that in a single device, a plurality of Sensors are located. In General, the infrared are made Sensors pyroelectric materials such as, for example, Lithium Tantalate (LiTaO3). These materials respond to changes in the temperature and generate electric voltages. If a pyroelectric Material is exposed to heat, it sends out a Signal. This can enable, for example, the Alarm of an alarm system.
How are infrared sensors used in the industry?
According to a similar principle, such as the alarm system, those IR sensors, which are used in the early warning systems of industrial machines. There, you can make, for example, in the manufacture of vehicles and excellent services. Or in the quality control of production processes in other industries. There's even a special infrared sensors used in industrial image processing.