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Capacitive sensors can also replace mechanical buttons. A capacitive touchscreen typically consists of a capacitive touch sensor along with at least two complementary metal–oxide–semiconductor integrated circuit (IC) chips, an application-specific integrated circuit (ASIC) controller and a digital signal processor (DSP).
Each capacitor sensor consists of two metal rings mounted on the circuit board at some distance from the top of the access tube. These rings are a pair of electrodes, which form the plates of the capacitor with the soil acting as the dielectric in between. The plates are connected to an oscillator, consisting of an inductor and a capacitor. The ...
Capacitive displacement sensors can be used to measure the position of objects down to the nanometer level. This type of precise positioning is used in the semiconductor industry where silicon wafers need to be positioned for exposure. Capacitive sensors are also used to pre-focus the electron microscopes used in testing and examining the wafers.
Capacitive displacement sensor; Capacitive sensing; Displacement sensor (general article) Flex sensor; Free fall sensor; Gravimeter; Gyroscopic sensor; Impact sensor; Inclinometer; Incremental encoder; Integrated circuit piezoelectric sensor; Laser rangefinder; Laser surface velocimeter; LIDAR; Linear encoder; Linear variable differential ...
A charge-coupled device (CCD) is an integrated circuit containing an array of linked, or coupled, capacitors. Under the control of an external circuit, each capacitor can transfer its electric charge to a neighboring capacitor. CCD sensors are a major technology used in digital imaging.
Figure 2. Schematic symbol and circuit incorporating the mechanical–electrical analogy for a piezoelectric sensor. Figure 2's detailed model includes the effects of the sensor's mechanical construction and other non-idealities. [12] The inductance L m is due to the seismic mass and inertia of the sensor itself.
Electrical capacitance tomography system [1] with connected 16-electrode sensor Dynamic imaging in ECT - On the left, seven cylindrical objects moving along the probe. On the right, a series of probe cross-sectional images.
The sensor dimension is also limited by the gaps between the sensing electrodes. These are important due to fringe effects. The use of guard plates between electrodes have been shown to reduce these effects. Based on the intended application, tomographic sensors can be composed of single or more layers along the axial direction.