649 results about "Capacitive detection" patented technology

A capacitive force sensor (100) includes a substrate (101) having at least one electrode pair (102,103) defining a capacitance disposed thereon. The substrate (101) is fixed relative to a first plate (106). A drive circuit (104) is configured to apply a voltage relative to a circuit ground (105) to the electrode pair (102,103). The first plate (106) is separated from a second plate (107) that is coupled to circuit ground (105) by a compliance member (108,109). The compliance member (108,109) is configured to oppose a compression force (110) while allowing the first plate (106) to physically move relative to the second plate (107). A capacitive detection circuit (111) is then configured to detect a change the capacitance when the compliance member (108,109) is compressed. The compression force (110) is then determined from the change in capacitance and the spring constant of the compliance member (108,109).

A touch screen uses a combination of capacitive sensing and inductive sensing applied to the same sensor pattern. A capacitive sensor uses the electric field formed by the columns and rows of the sensor matrix. An inductive sensor uses the magnetic field formed by current flowing in column and row lines to induce an inductive pen. Using the same sensor lines, the magnetic field created by the oscillating inductive pen is detected. Both methods require no moving elements in the sensor and it is possible to combine both method of detections in the same sensor pattern. Using switch matrices, the sensor lines are operated in an open loop fashion for the capacitive detection mode, and are operated in a closed loop fashion for the inductive detection mode.

A capacitance detecting proximity sensor forms a proximity detection range in a spatially open region, avoids the effects resulting from peripheral objects outside the detection target, and enables proximity detection with few malfunctions. The proximity sensor includes: a first detection electrode and a second detection electrode that are disposed to have a predetermined range difference h with respect to a detection direction Y in which a detection subject comes into proximity to the proximity sensor and are independent from a ground potential; and a proximity detection circuit that outputs, as a proximity detection output, the difference between a capacitance to ground Ca formed by the first detection electrode and a capacitance to ground Cb formed by the second detection electrode.

A micromechanical resonator device and a micromechanical device utilizing same are disclosed based upon a radially or laterally vibrating disk structure and capable of vibrating at frequencies well past the GHz range. The center of the disk is a nodal point, so when the disk resonator is supported at its center, anchor dissipation to the substrate is minimized, allowing this design to retain high-Q at high frequency. In addition, this design retains high stiffness at high frequencies and so maximizes dynamic range. Furthermore, the sidewall surface area of this disk resonator is often larger than that attainable in previous flexural-mode resonator designs, allowing this disk design to achieve a smaller series motional resistance than its counterparts when using capacitive (or electrostatic) transduction at a given frequency. Capacitive detection is not required in this design, and piezoelectric, magnetostrictive, etc. detection are also possible. The frequency and dynamic range attainable by this resonator makes it applicable to high-Q RF filtering and oscillator applications in a wide variety of communication systems. Its size also makes it particularly suited for portable, wireless applications, where, if used in large numbers, such a resonator can greatly lower the power consumption, increase robustness, and extend the range of application of high performance wireless transceivers.

A capacitance detecting circuit of a capacitive sensor having a plurality of column lines and a row line intersecting the column lines detects a change in capacitance at an intersection of a column line and a row line. The circuit includes a PN code generating unit for generating a code having orthogonality in time sequence to output the generated code as a column drive signal, a column line drive unit for driving a predetermined one of the column lines which are selected in response to the code, a capacitance detecting unit, connected to the row line, for detecting a voltage by converting a total sum of changes in capacitance at intersections of the selected column lines into the voltage to output the detected voltage, and a decode processing unit for performing a predetermined calculation on the detected voltage output from the capacitance detecting unit and the code to determine a voltage value responsive to the capacitance change at the intersection.

The present invention provides a method for capacitive detection of the presence of target sample on a substrate, which comprises the steps of: binding a target sample to selective binding sites on the substrate, the target sample being directly or indirectly labeled with conductive labels, and sensing the presence of the bound conductive labels to a binding site to thereby determine the presence of the target sample. The sensing step is carried out by a capacitive detection of the presence of the conductive labels. The present invention also provides a capacitive sensor device for determining the presence of a target sample. Conductive labels are directly or indirectly couplable to the target sample. The capacitive sensor device comprises a substrate having attached thereto a binding site able to selectively bind a target sample, a capacitive sensor element, and sensing circuitry for determining the presence of a target sample bound to the binding site by application of electrical signals to a capacitive sensor element. The capacitive sensor element comprises a set of at least two electrodes with non-conductive surfaces in a region associated with the binding site.

this invention relates to power in direct-current circuits. The invention takes gallium arsenide as foundation (1). On the foundation has power divider, power synthesizer, 90deg phaser, solid beam structure. Power divider and power synthesizer composed by port one (7), port two(8), port three(8), dissymmetry coplane band line(10), nitride tantalum electric resistance. Solid beam structure includes signal input port(16), pier(5), solid beam(13), pedestal structure(6), sensing electrode(4), sensing electrode leader(12), capacitance detecting port(15), air bridge(14). There are nitriding silicon medium layer on the transmission line, pedestal structure and sensing electrode under solid beam, and sensing electrode leader under Air Bridge.

A capacitance detector, used in an area sensor having a matrix of detection lines, detects minute capacitances near intersections of a plurality of column lines and a plurality of row lines. The capacitance detector includes a column-line driver for outputting to the column lines a signal that rises in response to a first voltage and then falls in response to a second voltage; a row-voltage outputter for outputting a third voltage corresponding to a current for charging the capacitance at each of the intersections when the column lines are driven by the first voltage and for outputting a fourth voltage corresponding to a current for discharging the capacitance at each of the intersections when the column lines are driven by the second voltage; and a calculator for calculating the difference between the third voltage and the fourth voltage. The difference is calculated at each of the intersections.

Apparatus and methods are disclosed related to managing characteristics of a mobile device based upon capacitive detection of materials proximate the mobile device, a capacitive gesture system that can allow the same gestures be used in arbitrary locations within range of a mobile device. One such method includes receiving a first capacitive sensor measurement with a first capacitive sensor of the mobile device. The method further includes determining a value indicative of a material adjacent to the mobile device based on a correspondence between the first capacitive sensor measurement and stored values corresponding to different materials. The method further includes sending instructions to adjust a characteristic of the mobile device based on the determined value indicative of the material adjacent to the mobile device. In certain examples, gesture sensing can be performed using capacitive measurements from the capacitive sensors.

A capacitive sensor system for controlling operation of a device in response to a rate of change in capacitance due to motion of a proximate object includes at least two sense electrodes disposed on a surface and a phase locked loop, including a voltage controlled oscillator and a phase/frequency comparator, connected between the sense electrodes and an RC network for providing an operating frequency to the sense electrodes. A circuit loop, including a reference oscillator, provides a fixed frequency reference for the phase locked loop to follow and a phase delay circuit connected between the phase/frequency comparator and the voltage controlled oscillator causes the voltage controlled oscillator to run ahead of the reference oscillator. A trigger circuit provides a control output in response to a change in phase shift between the fixed frequency and the operating frequency.

A solid-state roller on a pointing device with enhanced features. The solid-state design described herein allows the sensor to be placed on any shape of surface, such as one that has curvature in two directions. In one embodiment, a trench or downward curve contains sensors for detecting finger movement. The user's finger can thus bend about a knuckle in a curved motion to activate the sensor, requiring little or no movement of the finger up and down. The solid-state sensors can be of one of a number of designs. In one embodiment, multiple electrodes are contacted by a finger as it moves. Each electrode is coupled to a capacitive detection circuit, for detecting the change in capacitance as the electrode is contacted by the finger.

A capacitive detection device (20) for a vehicle comprises a sensing electrode (26) for generating an oscillatory electric field in a detection space and a shielding electrode (28) arranged on a side of the sensing electrode turned away from the detection space. The capacitive detection device comprises a circuit ground and a ground connector for connecting the circuit ground to chassis ground of the vehicle. At least one shunt capacitor is connected between circuit ground and the shielding electrode. The at least one shunt capacitor has a capacitance at least 25 times higher than the capacitance between the shielding electrode and the chassis ground of the vehicle.

The invention relates to a capacitance detection system which comprises a feeding inlet subsystem, a conveyer belt system, an optical chamber system and an electronic installation box system, wherein the optical chamber comprises an optical image acquisition system, an optical chamber cleaning cooling ventilation system and an air purification FFU (Fan Filter Unit) system; the conveyer belt system comprises a device conveyer belt system and a device rotation table; the electronic installation box system comprises a power supply tank, an algorithm main control subsystem and a motion control PLC (Programmable Logic Controller) subsystem; the feeding inlet subsystem comprises a feeding grasping device, a material cabin, a vibration disc and a capacitance angle adjusting device. The capacitance detection system integrates the packaging function and a detection system into one equipment system, an automatic conveying and pin correcting system at the front end of the equipment is canceled, secondary damage caused by material movement after capacitance detection is avoided, the single capacitance detection efficiency is 40-50/minute, and the capacitance detection efficiency is as high as 1.2s for each capacitor, so that manual detection can be completely replaced.

The invention discloses a capacitive sensing system, electronic equipment and a detection method of the capacitive sensing system. The capacitive sensing system comprises a sensor board and a capacitance detection circuit, wherein the sensor board is coupled with a target object in a capacitance manner to execute sensing operation; the capacitance detection circuit comprises a signal transmission end and an earthing end, and is used for providing a first excitation signal for the sensor board via the signal transmission end to drive the sensor board to execute sensing operation; the earthing end of the capacitance detection circuit is used for loading a first modulation signal; and the first excitation signal varies with the first modulation signal. With the adoption of the technical scheme, the sensing accuracy of the electronic equipment is improved.

An electric path (E) is formed by connecting a spindle (11), a tool (12), a table (4), a base (2), a column (5) and a housing (13) including a capacitor (C0) having the spindle (11) and the housing (13) as electrodes, and electric current is sent to the electric path (E) by a current generator (51). An electro-capacitance change is detected by measuring a current value in the electric path (E) by an electro-capacitance detector (52) to detect a state of a bearing gap between the spindle (11) and the housing (13). No multiple sensors are necessary and the spindle state detector (50) can be simplified.

A system and method for electronically detecting the accumulation of dust within a computer system using a capacitive dust sensor. The dust detection system may be implemented on a smaller computer, such as an individual PC, or in a more expansive system, such as a rack-based server system (“rack system”) having multiple servers and other hardware devices. In one embodiment, each server in a rack system includes a capacitive sensor responsive to the accumulation of dust. The capacitive sensor may include one or more capacitive plates integral with a heatsink. As dust collects on the capacitive plates, the capacitance increases. When a capacitance setpoint is reached, indicating the dust has reached a critical level, an alert is generated. The alerts may be received by a management console for the attention of a system administrator. Each alert may contain the identity of the server generating the alert, so that the system administrator knows which server(s) are to be removed for cleaning.

A system for capacitive detection of seat occupancy in a vehicle comprises a sensing electrode and a shielding electrode arranged in substantially parallel layers. A spacer is arranged between the sensing electrode and the shielding electrode to keep the sensing electrode and the shielding electrode at a certain distance from each other. The spacer comprises an inner textile layer and at least one of the electrodes comprises a film-based electrode.

A manufacturing method for producing a micromechanical sensor element which may be produced in a monolithically integrable design and has capacitive detection of a physical quantity is described. In addition to the manufacturing method, a micromechanical device containing such. a sensor element, e.g., a pressure sensor or an acceleration sensor, is described.

A system and method for improved accuracy in the detection of a stylus on a touch sensitive surface of an electronic device, such as a tablet. A dual method of detection is employed including electromagnetic induction detection of the stylus as it is in the vicinity of the screen of the electronic device, as well as capacitive detection of the stylus tip as it contacts the touch screen. The electronic device detects the presence of the top of the stylus and provides the general coordinates of its position. Then, as touches occur on the surface of the device, e.g., the stylus tip as well as the various parts of the user's hand, the system uses the coordinates supplied from the electromagnetic induction detection to very quickly and accurately pinpoint the actual location of the stylus input on the surface of the device.