摘要:
There is provided a high resolution circuit for converting a capacitance-to-time deviation including a capacitance deviation detecting unit generating two detection signals having a phase difference corresponding to variations of capacitance of an micro electro mechanical system (MEMS) sensor; a capacitance deviation amplifying unit dividing frequencies of the two detection signals to amplify the phase difference corresponding to the capacitance deviation; and a time signal generating unit generating a time signal having a pulse width corresponding to the amplified phase difference.
摘要:
Provided is a small piezoelectric power generator applied to a wireless sensor network system of a tire pressure monitoring system (TPMS) for monitoring an internal environment of a tire such as variation in air pressure in the tire. In particular, when the system, in which air pressure, temperature and acceleration sensors are mounted, installed in the tire is operated in the TPMS for an automobile, a small piezoelectric power generator for the TPMS can be used as a power source in place of a conventional battery. The piezoelectric power generator includes a substrate having an electrode for transmitting power to the exterior, a metal plate formed on the substrate, and a piezoelectric body disposed on the metal plate and transmitting the power generated by a piezoelectric material to the electrode.
摘要:
There is provided a high resolution circuit for converting a capacitance-to-time deviation including a capacitance deviation detecting unit generating two detection signals having a phase difference corresponding to variations of capacitance of an micro electro mechanical system (MEMS) sensor; a capacitance deviation amplifying unit dividing frequencies of the two detection signals to amplify the phase difference corresponding to the capacitance deviation; and a time signal generating unit generating a time signal having a pulse width corresponding to the amplified phase difference.
摘要:
A micro semiconductor-type pressure sensor and a manufacturing method thereof are provided. The micro semi-conductor-type pressure sensor is implemented by etching a cavity-formation region of a substrate to form a plurality of trenches, oxidizing the plurality of trenches through a thermal oxidation process to form a cavity-formation oxide layer, forming a membrane-formation material layer on upper portions of the cavity-formation oxide layer and the substrate, forming a plurality of etching holes in the membrane-formation material layer, removing the cavity-formation oxide layer through the plurality of etching holes to form a cavity buried in the substrate, forming a membrane reinforcing layer on an upper portion of the membrane-formation material layer to form a membrane for closing the cavity, and forming sensitive films made of a piezoresisive material on an upper portion of the membrane.
摘要:
A method for providing a Graphic User Interface (GUI) associated with execution of an application in a mobile terminal supporting a multi-tasking function, and an apparatus implementing the same. The method for providing (GUI) in a mobile terminal, preferably includes: displaying an application execution icon region and application execution screen region configured by one or more application execution icons; receiving selection of one from the one or more application execution icons; and displaying a reduction mode execution screen of an application corresponding to the selected application execution icon on the application execution screen region. When using a multi-tasking function of a mobile terminal, the user can view a plurality of application execution screens on one screen, and input an operating command for a plurality of applications on one screen.
摘要:
A mobile device with a touch panel and a touch-lock operating method thereof are provided. The mobile device preferably includes an RF communication unit for supporting communication services; a touch panel for sensing input touches; a display unit for displaying a screen, where the screen includes at least one of a preset image, text, and map; and a controller for setting a touch-lock in the touch panel according to a preset condition. The controller also controls the display unit to display at least one of a text and image or at least one particular icon corresponding to the information reception event that occurs, based on the RF communication unit, in the touch-lock state. A portion of the display screen can be locked, or only certain predetermined touch functions permitted.
摘要:
Provided is a small piezoelectric power generator applied to a wireless sensor network system of a tire pressure monitoring system (TPMS) for monitoring an internal environment of a tire such as variation in air pressure in the tire. In particular, when the system, in which air pressure, temperature and acceleration sensors are mounted, installed in the tire is operated in the TPMS for an automobile, a small piezoelectric power generator for the TPMS can be used as a power source in place of a conventional battery. The piezoelectric power generator includes a substrate having an electrode for transmitting power to the exterior, a metal plate formed on the substrate, and a piezoelectric body disposed on the metal plate and transmitting the power generated by a piezoelectric material to the electrode.
摘要:
There is provided a bidirectional readout circuit for detecting direction and amplitude of an oscillation sensed at a capacitive microelectromechanical system (MEMS) accelerometer, the bidirectional readout circuit converting capacitance changes of the capacitive MEMS accelerometer into a time change amount by using high resolution capacitance-to-time conversion technology and outputting the time change amount as the direction and the amplitude of the oscillation by using time-to-digital conversion (TDC) technology, thereby detecting not only the amplitude of the oscillation but also the direction thereof, which is capable of being applied to various MEMS sensors.
摘要:
A three-dimensional inclination angle calculation circuit is provided. The three-dimensional inclination angle calculation circuit includes: X-axis, Y-axis, and Z-axis vibration sensors which change X-axis, Y-axis, and Z-axis electrostatic capacitances according to three-dimensional positions of a measured plane with respect to a reference plane, respectively; X-axis, Y-axis, and Z-axis position value acquisition units which acquire X-axis, Y-axis, and Z-axis position values corresponding to the X-axis, Y-axis, and Z-axis electrostatic capacitances, respectively; and an inclination angle calculation unit which calculates an inclination angle of the measured plane with respect to the reference plane based on the X-axis, Y-axis, and Z-axis position values. Accordingly, it is possible to very easily calculate an inclination angle according to a three-dimensional position of a to-be-measured apparatus by using an existing vibration sensor.
摘要:
There is provided a micromachined sensor for measuring a vibration, based on silicone micromachining technology, in which a conductor having elasticity is connected to masses moving due to a force generated by the vibration and the vibration is measured by using induced electromotive force generated due to the conductor moving in a magnetic field.