Class / Patent application number | Description | Number of patent applications / Date published |
702052000 | Capacitive sensor | 9 |
20080234951 | Gravity Flowmeter for Materials Analysis - Properties of asphalt are determined by determining an expansion of a plurality of samples of the asphalt as a function of current dimensions of the respective samples, determining a creep of the samples as a function of the current dimensions of the respective samples, repeating the determining steps over a plurality of temperatures, and determining a master creep modulus and a temperature coefficient of the asphalt as a function of the plurality of expansions and the plurality of creeps. | 09-25-2008 |
20090063060 | Methods for detecting oil deterioration and oil level - Methods for detecting oil conditions including a top oil level in an oil system which is reduced to a top level of a threshold amount of the oil, a normal oil deterioration which occurs in the absence of water having a confirmed remaining oil usage, and an abnormal oil deterioration which occurs in the presence of water. The methods comprise a first preferred embodiment which applies a reference and sensing capacitors to obtain a measured temperature compensated electrical property of an oil in use. From which a quantitatively measured remaining usage is obtained so as to a predicted one for the oil. Therefore, the respective top oil level, or the normal or the abnormal oil deterioration can be concluded according to the measured remaining usage which is respectively larger than, or similar to, or less than the predicted one for the oil. A second preferred embodiment only includes the sensing capacitor for obtaining the measured property of the oil. Variations to the embodiments lead to employment of at least two sensing capacitors to monitor an uneven distribution of the oil deterioration or a full range of the oil level of the entire oil system. | 03-05-2009 |
20090187357 | Liquid Level Determination by Capacitive Sensing - The present invention provides methods and apparatuses for determining a liquid level inside a container by using an effective capacitance associated with one or more sense electrodes that are located inside the container. Embodiments may support different types of liquids, including water, and support different electrical appliances, including electric kettles, coffee makers, and water treatment appliances having a non-transparency housing such as stainless steel and black color Lucite or glass that cannot directly indicate the water level. A value of capacitance characteristic associated with a sensing electrode is determined. The water level may be displayed to the user on any kind of electronic panel, e.g., liquid crystal display (LCD), light emitting diode (LED) display, or vacuum fluorescent display (VFD). Also, a correction factor may be applied to a determined capacitance associated with a sensing electrode to compensate for the operating temperature of the sensor electrode and the liquid. | 07-23-2009 |
20090216466 | CAPACITATIVE NODE MEASUREMENT IN A CAPACITATIVE MATRIX PRESSURE INDUCER - A method and system for measuring the distribution of pressure forces over a selected area includes a sensor having an array of pressure sensing capacitance nodes formed by intersecting rows and columns, where measured capacitance of a node is compared to a fixed value of reference capacitance placed on each row that can be measured as if it was another node. | 08-27-2009 |
20110071775 | PRESSURE MEASUREMENT USING A MEMS DEVICE - A device to measure pressure is disclosed. In one embodiment, the device includes at least one element with two layers separated by a space which changes over a variable time period in response to a voltage applied across the two layers. The time period may be measured and is indicative of the ambient pressure about the device. | 03-24-2011 |
20120197554 | SELF-HEATED MEMS BASED CAPACITANCE DIAPHRAGM GAUGE - The disclosed embodiments include a capacitance diaphragm gauge that includes a self-heated micro-electro-mechanical-system sensor for measuring pressure. The self-heated micro-electro-mechanical-system has at least one integrated heater component and at least one membrane on the self-heated micro-electro-mechanical-system. | 08-02-2012 |
20120278009 | Melt Pressure Sensor - A melt pressure sensor comprises a housing, a stem, a pressure sensing element, a time-to-digital converter, a processor, a digital-to-analog converter, and a first input. The stem comprises a pressure sensing surface fluidly coupled to a molten material. The pressure sensing surface is mechanically or fluidly coupled to the pressure sensing element, and the pressure sensing element is electrically coupled to the time-to-digital converter, which determines the melt pressure by measuring an electrical characteristic of the pressure sensing element. The processor reads the pressure from the time-to-digital converter and outputs an analog output value from the digital-to-analog converter representative of the melt pressure. When the first input is activated, the processor causes the analog output signal to have a predetermined value. | 11-01-2012 |
20130018604 | FUEL GAUGING SYSTEM UTILIZING A DIGITAL FUEL GAUGING PROBE - An apparatus includes a probe configured to be mounted in a tank for at least partial immersion in a liquid. The probe has a body disposed inside the fuel tank. A capacitance-to-digital (CDC) circuit is disposed on the probe in the tank, such that the CDC is disposed inside the fuel tank and is operably connected to the body. | 01-17-2013 |
20140088890 | METHOD FOR TEMPERATURE COMPENSATION IN SENSOR, COMPUTATION PROGRAM FOR METHOD FOR TEMPERATURE COMPENSATION, COMPUTATION PROCESSING DEVICE, AND SENSOR - Temperature compensation is performed using a computation program for temperature compensation, a computation processing, and a sensor. Deformation in a diaphragm caused by a pressure change due to the temperature of the gas in a cavity is cancelled out, and deformation of the diaphragm is minimized within the target temperature range, thereby allowing an optimum temperature compensation to be performed. The temperature compensation in a capacitance-type sensor executes calculation steps which include including a calculation step (S | 03-27-2014 |