Have you heard of MEMS? If not, we’re here to tell you!
MEMS (Micro-Electro-Mechanical System) is a device that is invisible to the naked eye and is employed in almost every aspect of life, either directly or indirectly. By merging silicon-based microelectronics with micromachining technology, MEMS has been designated as one of the most promising technologies for the twenty-first century, potentially changing both industrial and consumer products. Its methods and microsystem-based gadgets have the potential to have a significant impact on all of our lives and how we live.
MEMS in everyday life
MEMS are already being used in a wide range of applications, including controlling and handling equipment, managing robots, vehicles, grippers, and so on. These sensors are used in modern inkjet printers, color projectors, and other electronic devices. MEMS technology creates various sensors, including pressure, temperature, vibration, and chemical sensors. Automobiles, helicopters, planes, drones, and ships use MEMS sensors like accelerometers, gyroscopes, and e-compass.
The four types of MEMS are given below:
MEMS accelerometers are used for Electronic Stability Control and Airbag deployment when linear motion, such as movement, shock, or vibration, must be measured without a stable reference. A micro-electromechanical system (MEMS) accelerometer is a device that measures acceleration and force. There are many different types of accelerometers in the market, and they can be classified based on the energy that it records.
The piezoelectric accelerometer is one of the most often used. These MEMS sensors have various uses, including gravity sensors, digital compass, GPS tracking, and smartphone applications. Variable capacitive and piezoresistive MEMS accelerometers are the two types. Variable capacitors are extremely sensitive, and piezoresistive devices are low-range devices used to measure acceleration.
MEMS gyroscopes, also known as MEMS angular rate sensors, are small micro-electromechanical devices that use low-cost sensors to measure angular velocity, rotational motion, or displacement. The revolutions per second (RPS) or degrees per second units of angular momentum is used. It merely measures the rotational speed. Gyroscopes are mechanically spinning wheels or discs set on an axle that can freely assume directions. Vibratory Gyroscopes divides into three types: Vibrating Beam, Vibrating Disk, or Vibrating Shell. MEMS gyroscopes are utilized in various applications, including vehicle stability control, image stabilization, airbag systems, industrial robots, photography, automotive roll-over prevention, car navigation systems, and many others.
MEMS pressure sensors
Pressure sensors are piezoresistive pressure sensing devices that have undergone MEMS processing. Pressure sensors can be used for various purposes; depending on the application.
MEMS pressure sensors are used in various applications, including defense, medical, industrial, beverage machines, washing machines, aerospace applications, industrial machinery, and automotive applications to monitor and measure external pressure. The sensor is integrated into the vehicle’s tires, either internally or externally, to measure and monitor tire pressure.
Pressure sensors are divided into five categories:
- The sensor of absolute pressure
- Sensor for vacuum pressure
- A pressure sensor that is sealed
- Pressure gauge sensor
- Pressure differential sensor
MEMS magnetic field sensors
MEMS magnetic field sensors are systems that detect and measure magnetic fields on a small scale. Sensors detect changes in force, allowing for easy electrical measurement of voltage frequency. It can be placed close to the measurement site, resulting in increased spatial resolution. MEMS magnetic field sensors are used in industrial, consumer, and automotive applications to detect linear angle, speed, rotational speed, linear position, and position.