AMN12112

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Motion sensors are sensors that detect the changes or motions of objects within a given range. Optical motion sensors detect changes in an environment using the reflection of light or infrared radiation. Most such motion sensors operate using the optical, magnetic, microwave, and acoustic sensing principles. In this article, we focus on the AMN12112 application field and working principle of optical motion sensors.

The AMN12112 motion sensor consists of an effective 5m range PIR (passive infrared) sensor, a low-voltage terminal, an on-board LED indicator, and a Fresnel lens. It can detect an intruder at a distance of up to five meters and is suitable for applications such as home security systems, door and window detectors, and alarm systems. The device also includes an integrator and two output pins, an interpreter, and a lamp control output pin to signify an alarm.

The primary detection mechanism of the AMN12112 motion sensor is the Fresnel lens which is positioned between the PIR sensor and the target. When a movement is detected by the PIR sensor, the Fresnel lens concentrates the infrared radiation emitted by the target into the sensor. The PIR sensor then detects the change in the amount of infrared radiation and triggers an alarm if the difference in radiation is above a predetermined threshold. Computer algorithms interpret the changes to ensure accuracy and stability.

The working principle of the AMN12112 motion sensor is based on a pair of pyroelectric elements, which are positioned in conjunction with the Fresnel lens. The pyroelectric elements are designed to detect changes in infrared radiation as interpreted by the Fresnel lens. When a movement is detected, the lens focuses the infrared radiation onto the pyroelectric elements which creates a tiny electrical signal. This signal is then amplified by an integrated amplifier and sent to the interpreter where a computer algorithm determines if the signal represents a valid movement or not and then triggers an alarm if necessary.

The AMN12112 motion sensor is a reliable and accurate device ideal for implementing security measures in various environments. Its Benefits include a compact design, low power consumption, and a detection range of up to 5 meters. This makes it a suitable choice for implementing security measures in homes, offices, and other facilities.

In conclusion, the AMN12112 motion sensor is a reliable and accurate device for detecting the movements of objects within a given range. Its application field includes home security systems, door and window detectors, and alarm systems and its working principle is based on a Fresnel lens combined with a pair of pyroelectric elements. The AMN12112 motion sensor offers the advantages of a compact design, low power consumption, and a detection range of up to 5 meters, making it an ideal choice for implementing security measures in various environments.

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