Infrared Sensors

Infrared sensors are a type of motion sensor, and they are mainly used to detect intrusions. These sensors are divided into two categories; passive and active infrared sensors. As stated above, these sensors work using infrared radiation, but their functioning depends on their sensor.

Active infrared sensors use radar technology and receive and emit infrared radiation. This radiation only hits nearby objects before bouncing to the receiver device. This means this sensor detects movement in a specific place and how far the person is from the device.

On the other hand, passive infrared sensors are more prevalent. Here, the PIR sensors do not release radiation but only take the one that is being emitted by the object. The standard function of these sensors is to trigger alarms when abnormal waves occur.

Below, we discuss everything you need to know about infrared sensor arrays.

Infrared Sensor Digression

Infrared radiation functions on the electromagnetic spectrum’s lower end. The spectrum’s infrared section is found between microwaves and visible waves. Infrared radiation is characterized by objects with a high temperature, and thermal energy should use a transmission medium to reach the IR sensor.

Types of Infrared Sensors

Infrared sensors are broken down into the following categories;

Active Infrared Sensors

Active infrared sensors consist of a receiver and a transmitter. Most laser diodes or LED cases are used as sources. Active infrared sensors radiate energy, and they include reflective sensors.

Passive Infrared Sensors 

Passive infrared sensors only have detectors, meaning they lack transmitters. These sensors use objects as transmitters, and they radiate energy.

Infrared Sensor Applications

IR sensors have plenty of applications in many pieces of equipment today. The most common applications include the following;

Proximity Sensor

These are used to determine the distance of an object on smartphones. Proximity sensors use the reflective indirect incidence principle, which heads to the receiver. The received radiation intensity is then used to calculate the distance.

Burglar Alarm

This is one of the primary uses of sensors. Receivers and transmitters are put on the door frame, and radiation is maintained between both objects.

Radiation Thermometers

This is one of the most critical functions of infrared sensors. Radiation thermometers have easy pattern measurements and a faster response. These thermometers can measure easily without object contact.

Human Body Detection

 This method is used in auto light switches and intrusion detection. The intrusion alarm unit senses the human body temperature and sets alarms if it is higher than required.

This system uses an electromagnetic unit that safeguards the body from harmful radiation.

Benefits of the Infrared Sensor

The main advantages of infrared sensors include the following;

  • They do not need contact to detect motion
  • They have a solid immunity to noise
  • They detect movement in the presence or absence of light.
  • They are not affected by oxidation or corrosion.
  • They have low power requirements, making them perfect for most electronic gadgets.

Disadvantages of Infrared Sensors

The main disadvantages of these sensors include the following;

  • They have a limited range
  • They can be affected by certain environmental conditions
  • They might get blocked by particular objects
  • They have a low transmission data range.

Types of Security Sensors

Even though every home has unique features, everyone should have custom security with the best sensors. Below, we discuss the different sensor types.

Window Sensors

Door and window sensors are the backbone of your property’s security. These sensors come in different pieces; one is put on the window, while the other is placed on the frame. Both sensors are positioned close to each other to send signals after they are separated.

These sensors mainly work on traditional doors but can also be tuned to monitor different monitors in a property.

Motion Detectors

Motion sensors use infrared energy to create a map and are put in the corner of a wall. These sensors identify human temperature whenever a stranger walks in and can also be set for sensitivity.

Glass Break Sensors

These sensors aim to protect your property from intruders. These items listen for any glass breaking before sending signals to the owner.

Final Thoughts

Sensors have existed for an extended period, providing homeowners with the ultimate security feature. These items are easy to find and have tremendous benefits. The above article has discussed everything you need to know about infrared sensor arrays; more information is available online.

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