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How exactly do Motion Sensors work?
Monday, January 7, 2019

The first motion sensor was invented in the year 1950 by Samuel Bagno. Using the basics of radar to ultrasonic waves, he created what was essentially a sophisticated burglar alarm. The nascent device had the ability to notice hazards that a human could not, at least initially, such as a fire or thief.

The first motion sensor was based on the principle of the Doppler Effect. To this day, motion sensors are designed using the same principles. Now that we’ve taken a short trip down memory lane, we can look at the important aspects of motion sensors.

Definition

Essentially, a motion sensor is a device that can detect movements easily. This may the presence of mobile individuals, although it may include animals and objects as well. A motion sensor is frequently incorporated as a component of systems that alerts users of motion in a specific area.

These sensors are essential and are a vital component in security, energy efficiency, automated lighting control and other systems as well. In residences, motion sensors are used to warn occupants in case a burglar is able to break into their home.

A signal is immediately sent to the control panel, which alerts the monitoring center. Home owners are promptly warned about the presence of unwanted individuals in their dwelling. If such a scenario transpires during the night, then the alarm may wake up residents as well.

Types

There are a few kinds of motion sensors and we will examine a few below:

Passive Infrared Sensor

Passive infrared sensors include a thin pyro electric film material that is able to respond to infrared radiation by the emission of electricity. This is typically produced by most warm blooded animals.

Hence, in case a burglar arrives and makes their way inside your property, the sensor will activate the alarm whenever there is an influx of electricity. Also, passive infrared sensors are cost effective and particularly durable as well. They are mainly used as indoor alarms.

Ultrasonic Sensor

Another type of motion sensor is called ultrasonic sensor. These can be either active or passive. The latter includes paying close attention to specific sounds like metal or the sounds that emanates from glass when it is broken.

Ultrasonic sensors are extremely sensitive, are exorbitantly priced and are prone to fake alarms as well. Active ones generate an ultrasonic wave pulses and determine the reflection of these waves off a moving object. Domestic animals are able to hear this sound, which may prove disconcerting for them.

Tomographic Sensor

This type of sensor exhibits radio waves and is able to detect when those waves face an impediment. Additionally, they can also observe through walls and objects and are commonly placed in a way that allows the radio wave net to cover maximum area. Tomographic sensors are normally used in warehouses, storage units and other scenarios where a commercial level of security is warranted.

If you are interested in motion control sensors, then you may want to visit the Rilco Industrial Controls website.



 
 
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 What's New in Rilco  What's New:

How exactly do Motion Sensors work?
Monday, January 7, 2019

The first motion sensor was based on the principle of the Doppler Effect and sensors today are still designed using the same principles.


The Science Behind Barcode Scanners
Wednesday, December 19, 2018
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