AMN22112

Motion sensors are an essential component in a large number of applications today. One type of motion sensor technology is optical motion sensors. These particular types of sensors detect displacement, velocity, acceleration, deceleration, and motion magnitude by detecting changes in the light reflected off the object they are tracking. In this case, the AMN22112 model optical motion sensor is considered for application in various contexts and its underlying working principle is reviewed in detail.

Sensor Application

The AMN22112 optical motion sensor is tailored to fit various movement sensing needs. It is designed to detect horizontal and vertical movements with a detection range of up to 150mm. It is ideal for applications which require a motion sensor to trigger an alarm or to control a system, such as an automatic door. Specifically, this model is used in automatic door systems, security systems, robotic arm systems, and other industrial automation related systems. With its small size, low power requirement, and short reaction time, the AMN22112 can offer a considerable convenience to its users. It uses an environment friendly and undetectable infrared light source, making it suitable for a variety of applications.

Working Principle

The AMN22112 utilizes optical displacement sensing technology. The core of the device is made up of two components, an infrared twin photo-detector module and a heat dissipation module, both of which are housed in a single plastic package. The light projector emits an infrared beam, which is detected by the twin photo-detector module. The reflected infrared beam is split and detected by both photo-detectors on the module, creating two signal outputs. There is a diffuse component, generated the reflecting surface’s unpredictability and a specular component. The phase difference between the two generated signals is evaluated by the auto-correlation matrix processing algorithm, which allows for the estimation of the displacement value of the reflecting object.

The AMN22112 also features other innovative technologies, such as an impedance compensation circuit, a signal processing circuit, and a noise reduction circuit. The impedance compensation circuit allows for the compensation of any unbalanced line impedance, while the signal processing circuit produces a clean signal with low noise interference. The noise reduction circuit helps to reduce the signal noise further, promoting accuracy and stability of the system. The working principle of the AMN22112 is such that the light beam reflects off the moving object, the photo-detector module splits the reflected beam into two signals, and the module then evaluates the phase difference between the two signals to calculate the moving object’s displacement.

Conclusion

The AMN22112 is an optical motion sensor suitable for a variety of applications. Its small size, low power requirement, and short reaction time make it suitable for applications such as security systems, automatic door systems, and industrial automation related systems. Additionally, it utilizes optical displacement sensing technology with an auto correlation matrix processing algorithm to detect the displacement value of the reflecting object. It also employs impedance compensation, signal processing, and noise reduction technologies. This AMN22112 is shown to be an effective and reliable motion sensor for diverse applications.