China OEM Motion Sensor Factory Supplier

Motion sensor, as the name implies, refers to the detection of objects or people's motion device, including gravity, linear acceleration, rotation vector, vibration frequency and so on. Motion sensors can be used to monitor equipment movement, such as tilting, rocking, rotating or swinging.

Among them, rotation vector sensor and gravity sensor are the most commonly used sensors for motion detection and monitoring. The rotation vector sensor is particularly flexible and can be used for a variety of motion-related tasks, such as detecting gestures, monitoring Angle changes and monitoring relative azimuth changes.

Motion sensors use different technologies, some using infrared radiation, some using acoustic pulses, and some based on vibrations. Today we'll look at various types of motion sensors, including accelerometers, tilt sensors, vibration sensors, PIR (passive infrared) sensors and rotation sensors.

• PIR

In nature, all objects will radiate infrared ray, so use detector to determine the infrared difference between the target itself and the background, can get different infrared images. The passive infrared sensor can detect the infrared radiation emitted by moving people or animals, and the output switch signal can be applied to various occasions that need to detect moving human body.

A PIR is a pyroelectric device that works by sensing changes in the radiant heat, or infrared, emitted by objects around it to detect movement by generating a voltage when heated or cooled.

PIR sensors usually include field of view and/or linear distance specifications, and most have plastic lenses. Commonly used in intruder alert systems. For example, they could be installed inside car safety lights that illuminate lanes when people approach.

• Accelerometer

Accelerometer is an instrument for measuring the linear acceleration of the carrier. It measures its own motion as opposed to a remote sensing device. They can be used inside smartphones (and tablets), so accelerometer is now cheap and easy to use, given the huge scale of smartphone production.

Similar to other scientific and engineering systems, accelerometer and gyroscopes are used in inertial guidance systems. For example, airbag systems are most commonly used in modern cars to detect sudden deceleration in the event of a collision.

• Inclination sensor

Tilt sensors are somewhat similar to accelerometers, but the design complexity is much lower. A tilt sensor, also known as a motion detector or tilt switch, is a sensor that detects tilt, especially from the horizon.

As a detection tool, tilt sensor has become an indispensable measurement tool in bridge erection, railway laying, civil engineering, oil drilling, aviation and navigation, industrial automation, intelligent platform, mechanical processing and other fields.

• Vibrating sensor

There are many different methods and sensors used to measure and detect vibration. One such sensor is the aforementioned accelerometer. Many digital accelerometers have user-selectable sensitivity Settings that allow the device to detect accelerations from very large to very small.

Piezoelectric sensor is the ideal choice of vibration sensing technology. Piezoelectric sensors use piezoelectric effects to measure changes in acceleration, strain, or force by converting physical changes into electrical ones. In addition to detecting vibration, these same types of sensors are used to detect mechanical shocks.

• Rotation sensor

Perhaps the simplest rotation sensor uses a potentiometer as a voltage divider, where the voltage is proportional to the Angle of rotation.

Orthogonal encoders commonly used to measure rotational positions provide a specific number of isometric pulses per revolution. Orthogonal encoder is a kind of incremental encoder. Incremental encoders provide relative position feedback (and can also provide speed and direction) by generating a stream of binary pulses proportional to the rotation of the motor shaft. The orthogonal encoder has two channels whose phases are 90 electrical angles apart from each other.

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 China OEM Motion Sensor Factory Supplier