1. Acceleration sensor

Sensor acceleration refers to the velocity generated per unit time, measured acceleration. IC is called acceleration sensor. Information such as tilt and vibration can be measured by measuring acceleration. The unit of acceleration is m/s2 (SI). In addition, the unit G is acceleration based on standard gravity. In addition, there are units used to measure the acceleration of seismic vibrations.

Standard gravity. The acceleration of an object under the action of gravity. The rate at which an object increases per unit of time when it is in free fall. Generally speaking, the acceleration sensor is divided into low G acceleration sensor and high G acceleration sensor.

Capacitive acceleration sensor. ROM Group acceleration sensor MEMS capacitive acceleration sensor technology. The sensor component consists of a sensor with a Si fixed electrode, a movable electrode and a spring. The distance between the stationary electrode and the movable electrode is the same without acceleration. At acceleration, the movable electrode shifts. As a result, the position relationship with the fixed electrode changes, as does the capacity between the electrodes. The change in capacity is converted into voltage by ASIC and the acceleration is calculated.

2. Current sensor

The current sensor is a sensor that detects the current value in the circuit.

Current detection method and characteristics. The resistance detection type converts a voltage drop caused by a shunt resistance into a current. Simple installation, cheap price, simple operation; Magnetic field detection type has iron core. The current value is measured by measuring the magnitude of the magnetic field generated in the core based on the current flowing in the current line. This method does not require contact, has low power loss, but large core.

MI current sensor. In order to eliminate the shortcomings of the above magnetic field detection type in terms of installation difficulty and power loss, a non-contact current sensor assembly of MI magnetic field detection type was developed. MI sensor is a new generation of sensors, using a special amorphous filament, with ultra-high sensitivity magnetic detection capability, with magnetic impedance effect. Sensitivity exceeds that of Hall elements, allowing high precision detection of small changes in magnetism. As a result, non-contact current detection can be performed with high precision without the need to introduce current into the package.

3. Color sensor

In the photosensor (light sensor), the detection of R (red), G (green), B(blue)3 primary colors is called the color sensor. Color sensors detect RGB values by receiving ambient light through photodiodes.

Principle of color sensor. The color component of the reflected light will change with the color of the object. In general, the reflected light composition of red objects is red, yellow objects are red and green, and white objects are red, green and blue. The color of an object is determined by the ratio of the color reflection (R, G, B) component of the light reflected by the object. The human eye recognizes the colors of objects by obtaining the components of reflected light.

The structure of color sensor IC. Interior with color filter and infrared cut-off filter. Color sensor IC internal sensor by equipped with internal sensor R, G, B various color filters, has a higher filter. RGB has spectral characteristics, and is equipped with infrared cut-off filter, infrared removal characteristics, can identify color with high precision.