822 results about "Measurement test" patented technology

An analyte test sensor for use in measuring the concentration of a particular analyte in a test sample includes a non-conductive substrate, a reference electrode deposited on the substrate, a working electrode deposited on the substrate and a compensation electrode deposited on the substrate. The compensation electrode is provided with a resistive ladder and is designed to correct for test result inaccuracies which are the result of variances in the manufacturing of the test sensor. Specifically, in one embodiment, the compensation electrode corrects for test result inaccuracies in an analog manner by shunting a portion of the working current away from working electrode. In another embodiment, the compensation electrode corrects for test result inaccuracies in a digital manner by providing a calibration code which is proportional its resistance value. A batch of analyte test sensors are preferably manufactured in the following manner. An initial batch of the test sensors is constructed. Then, a limited sampling of the sensors is tested for accuracy using a control sample. Based on the test results, the resistance value of the compensation electrode for each remaining sensor in the batch is adjusted accordingly.

The present invention pertains to a portable apparatus for quantitatively measuring the concentration of specific substances in test samples of a lateral flow or microplate assay in medical, biomedical and chemical applications, and for making subsequent analysis and diagnosis. The portable apparatus includes a sample tray for carrying and aligning the test sample in the apparatus; a enclosure that may also serves as the frame of the apparatus; a digital image acquisition system that is used to obtain the digital image of the test sample on the sample tray; and a data display, processing, and analysis unit that is a general purpose or dedicated computer, such as a handheld computer (HHC), a pocket personal computer (PPC), a personal digital assistant (PDA), a palm-top computer, a laptop computer, or a dedicated microprocessor and associated hardware, for measuring the concentration of specific substances in the test sample, and making subsequent analysis and diagnosis, based on the measurement, statistical data, prior knowledge and mathematical model. The stated enclosure and frame, the digital image acquisition system, and the data display, processing and analysis unit are integrated to form the portable apparatus for various applications. The integrated apparatus of this invention, with a possible name—Portable Intelligent Multi-Diagnoser (PIMD), thus forms a portable and multiple-purpose tool for measuring the concentration of specific substances in test samples, and making subsequent analysis and diagnosis in a variety of settings, such as a mobile site, point of care or near patient care, and small laboratories.

A method is provided for analyte measurement by a user using an analyte measurement device. An analyte measurement is provided with a plurality of penetrating members and analyte sensors. Each analyte sensor is positioned in a sample chamber with a volume no greater than 1 μl. Each sample chamber has a working electrode, reference electrode and a counter electrode. The working electrode has a conductor, an enzyme and a mediator. A penetrating member and an unused analyte detecting member are presented into an active position. The following steps are then performed: (a) the penetrating member is fired to prick the skin and bring a fluid sample to the analyte detecting member, (b) the analyte level is measured, and (c) it takes no more than 10 seconds from the step of presenting the penetrating members and unused analyte into the active position through the step of measuring the analyte level.

A disposable biosensor test strip is provided that includes a plurality of penetrating members. Each penetrating member is associated with a capillary chamber that has a depth suitable for capillary flow of blood and holds a volume of less than about 1.0 μl of the blood sample. A working electrode and a counter or reference electrode are disposed within the capillary chamber. A reagent is proximal to or in contact with at least the working electrode. The reagent includes an enzyme and a mediator. The reagent reacts with glucose to produce an electroactive reaction product. A blood sample, containing glucose, is applied into the capillary chamber. The capillary chamber directs capillary flow of the blood sample into contact with the reagent to cause the blood sample to at least partially solubilize or hydrate the reagent. The blood sample is detected in the capillary chamber. The electroactive reaction product is electro-oxidized or electro-reduced at the working electrode. Within 10 seconds after detecting, a determination is made of glucose concentration and a readout of the measurement is provided. The glucose determination is made by correlating the electro-oxidized or electro-reduced electroactive reaction product to the concentration of glucose in the blood sample.

An instrument and method for optical testing of an eyeglass lens, including progressive addition lenses, to obtain image quality measurements includes an illumination system for presenting a beam of light to a test lens, a test lens positioning system for rotating the test lens so that different areas on the lens are illuminated, a zoom lens for focusing the beam at a constant effective focal length, a detection system for recording and measuring image quality of the test lens, and an alignment boom for conveying the zoom lens and the detection system such that the optical axis remains aligned with the beam existing the test lens. The instrument is fully automated and capable of obtaining measurements of the power, astigmatism, prism and modulation transfer function at various locations on the surface of the lens.

A test strip holder comprises a rectangular base having a concave part on its upper surface, arid a slidable moving part that is slidably fitted to the concave part of the base. When measuring the test strip, the test strip is reliably held between the base and the slidable moving part. After measurement, the test strip is ejected semiautomatically from the test strip holder by sliding of the slidable moving part with respect to the base. Therefore, the test strip after measurement, which has health problem and risk of infection, can be semiautomatically discarded without touching the test strip.

The present invention is an apparatus and method for determining the remaining service life of electrochemical energy generation and storage device including batteries, supercapacitors, DSSC solar cells and fuel cell. Measurements are performed by passing ultrasonic oscillations through the test object. The apparatus of the present invention comprises two arrays of transmitting and receiving ultrasonic probes between which the object being tested is affixed. Polyurethane tips are used for matching the acoustic resistance of the probes with the test object body. The apparatus includes means for positioning the transmitting and the receiving probe arrays relative to each other. The apparatus includes an electromagnetic means for measuring the test object thickness. The calibration characteristic for determining the remaining service life of a the test object are established from the signal values from the ultrasonic probes related to the number of charge-discharge cycles obtained at various charge values. A three-dimensional approximating dependence surface is constructed using the normalized signals from the receiving probes. The average value of this surface is determined. The remaining service life of the test object is determined using a calibration curve based on the average level of the surface

A jitter generator produces a jittery test signal for use in performing a jitter test on an integrated circuit (IC) device under test (DUT). The jitter generator includes a programmable delay circuit for delaying a non-jittery input signal with a varying delay controlled by input digital delay control data to produce the test signal. A pattern generator supplies a sequence of delay control data to the programmable delay circuit causing it to produce a desired jitter pattern in the test signal. During a calibration process, a measurement unit feeds the test signal back to the input of the programmable delay circuit, causing the test signal to oscillate with a period proportional to the delay through the delay circuit. The measurement unit then measures the period of the test signal for various values of delay control data and reports measurement results. Based on the measurement results, host equipment then determines an appropriate sequence of delay control data for producing a desired jitter pattern in the test signal and programs the pattern generator to produce that sequence of delay control data during a jitter test. The jitter generator can form a part of a built-in, self-test (BIST) circuit implemented within the DUT itself.

A sensor system having a sensor for measuring a gas parameter of a test gas via a measuring element which is accommodated in a housing and projects therefrom at least on the test gas side at a protruding section, and a test-gas line, through which the test gas flows, having a sensor insertion opening and a receiving element for the housing surrounding the insertion opening and attached to the test-gas line. For the purpose of assembly-independent, reproducible alignment of the measuring element with respect to the test-gas flow during assembly of the sensor system, the receiving element bears an internal thread, the piercing point of which is oriented with respect to the test-gas flow, and the housing bears an external thread, which is able to be screwed into the internal thread and the piercing point of which is oriented with respect to the measuring element. The housing is fixed via a predefined tightening torque in the receiving element.

A method for predicting transformer performance includes receiving information representative of a plurality of built transformers, the information comprising a design specification for each built transformer, and measured test information for each built transformer, receiving a second transformer design specification, and determining, via an intelligent system, a predicted test result for the second transformer design specification based on the second transformer design specification and the information representative of the plurality of built transformers.

The invention relates to a method for measuring the initial distortion of concrete and relative device. Wherein, it comprises the detections on the condensation of concrete and the self-dry contraction after initial condensation, while the front one uses vertical length measure, while embedding temperature sensor in the concrete, arranges detector at the top, and uses non-contact displacement sensor to measure the detector displacement generated by the concrete condensation, and uses computer to record the initial data of displacement sensor and the temperature sensor and the period data until the concrete is condensate; the second one uses transverse length measure method that embedding temperature sensor into the concrete; arranges detectors at two ends of test sample; uses non-contact displacement sensor to measure the displaces of detectors caused by the self-dry contraction after the condensation; and uses computer to record the initial data of displacement sensor and the temperature sensor and the period data. The invention can make the measure initial time of self contraction after irrigate molding, while the test result has better repeat ability and high accuracy.

A measuring apparatus is disclosed which includes an interferometer for measuring a wavefront of light transmitted through a test object by interference between light under test passed through the test object and reference light, and measures a polarization characteristic of the test object. The measuring apparatus has a measuring unit for measuring a polarization characteristic matrix in a pupil plane of the test object while the reference light is blocked or fringe scan is performed.

A heat transfer apparatus for use in measuring a rheological property of a test sample includes a receptacle for receiving the test sample and a heat conveying member in heat transfer relation to the receptacle. The heat conveying member has internal passages extending substantially equidistantly from one another through at least a portion of the heat conveying member to provide for counter-flow circulation of a fluid. The heat transfer apparatus may include heat exchanging elements in heat transfer relation to the receptacle responsive to electric current to transfer heat to or from the receptacle.

A 3D shape measuring apparatus using a shadow moire, which can measure a 3D shape of a test object by selectively switching on / off a plurality of illuminating parts irrespective of a form of the test object is provided. The 3D shape measuring apparatus using the shadow moire includes a grating 110, a grating moving part 120, a beam splitter part 130 being provided above the grating 110 to direct a first light source towards the grating 110 or pass a reflected image of a test object 102 reflected via the grating 110, a subsidiary illuminating part 140 being provided on one surface of the beam splitter part 130 to emit the first light towards the beam splitter part 130, an image sensor 150 being provided above the beam splitter part 130 to take the reflected image having passed through the beam splitter part 130, a plurality of illuminating parts 160 being inclined a predetermined angle of the viewing axis of the image sensor 140 to be positioned above the grating 110 and to be spaced apart from each other with an equivalent angle and emit a second light towards the grating 110, and a control part 170 controlling the grating moving part 120, the subsidiary illuminating part 140, the image sensor 150, and the plurality of illuminating parts 160, and thereby, transferring the image which is captured by the image sensor 150, in order to calculate a 3D shape of the test object 102, and controlling the plurality of illuminating parts 160 to be selectively switched on / off according to a shape of the test object 102.

An active load or source impedance synthesis apparatus for experimental characterization of electronic components (E) working in the range from 500 MHz to 110 GHz, includes an active loop with at least one amplifier (Am), one magnitude and phase control system (Ra, Rs, one directional coupler (Acc) and a measurement system connected to a device under test (E), where the directional coupler (Acc) is connected after the most significant losses of the measurement system.

A new adiabatic scanning calorimeter allows the thermal mass of a high-pressure reaction vessel to be dynamically compensated during a test. This allows the effective Φ factor for the experiment to be reduced to 1.0 without the use of complex pressure balancing equipment. Endothermic events can be quantified and sample specific heats can be measured. The time required for test completion is much shorter than for conventional adiabatic calorimeters, thus considerably improving apparatus productivity. The sensitivity to exotherm detection is at least as good as existing adiabatic calorimeters employing the Heat-Wait-Search strategy, but does depend on the temperature-scanning rate. In addition, the heat of reaction is obtained without reference to the heat capacity of the sample, pressure is measured continuously, reactants may be injected into the test vessel and the sample can be mixed during the test.

A computer-implemented method for color calibration and profiling of an output device includes measuring a color patch in a test pattern, which comprises a plurality of color patches, to obtain first image data; measuring the color patch in the test pattern to obtain second image data; transforming the first image data to a first estimated image data; determining a difference between the second image data and the first estimated image data to obtain a correction factor; and calculating, for each patch in the test pattern, a corrected image data by applying the correction factor to a subsequent estimated image data from the first sensor. The correction factor is used for correcting inaccuracies introduced when the first image data is transformed into the first estimated image data. The first image data and the second image data provide a measured color representation of the color patch in a device dependent color space and a device independent color space, respectively.

An instrument and method for measuring the elemental composition of a test material. The instrument has a source of penetrating radiation for irradiating an irradiated region of the test material, a detector for detecting fluorescence emission by the test material and for generating a detector signal, and a controller for converting the detector signal into a spectrum characterizing the composition of the test material. A platen of attenuating material extends outward from adjacent to, and surrounding, the irradiated surface of the test material. In certain embodiments, the thickness of the attenuating platen is tapered with increasing radial distance from the central irradiated region of the test material.

The present invention provides a blood cell analyzer, comprising: a measurement mode setting unit for setting the body fluid measurement mode; a measurement start indicating unit for receiving an instruction to start the measurement; an optical information acquisition unit for illuminating the measurement sample, from which The optical information is obtained from the cells contained in the measurement sample; the analysis unit, after the above-mentioned body fluid measurement mode is set, when the above-mentioned measurement start instruction unit receives an instruction to start the measurement, according to the above-mentioned measurement test prepared from the body fluid sample and the reagent for leukocyte measurement, The optical information obtained in the sample is used to classify the cells contained in the measurement sample into at least leukocytes and nucleated cells other than leukocytes, and count the nucleated cells other than leukocytes. The invention also provides a body fluid analysis method and a control system.

The invention provides a segmented trace hinge moment balance and belongs to the technical field of aerospace force measurement test aerodynamic force measurement. The segmented trace hinge moment balance is of an all-steel-component combined structure. The segmented trace hinge moment balance comprises a measuring device, a thermal insulation device and a limiting protection device. The measuring device comprises a simple-component balance and a six-component beam balance, wherein the central axis of the simple-component balance is perpendicular to the central axis of the six-component beam balance; the simple-component balance is fixed at the free end of the six-component beam balance and is used for measuring a trace hinge moment, and the six-component beam balance measures all the aerodynamic force borne by a control surface and thus corrects the disturbance from the rest of aerodynamic force to the trace hinge moment, so that the resolution ratio and the accuracy of measurement can be improved. The thermal insulation device is arranged on the outer side of the measuring device, so that the heat protection performance and the thermal insulation performance of the measuring device are improved, the temperature effect is reduced, and the accuracy of trace hinge moment measurement in wind tunnel tests under the condition of a high Mach number is improved.

The invention discloses a CMOS (complementary metal-oxide-semiconductor)-machine-vision-based component size measuring system and a measurement test method. The CMOS-machine-vision-based component size measuring system comprises an image acquisition module, an image processing module and a size measuring module, wherein the image acquisition module acquires images of contour edges of a shot component; the image processing module performs binaryzation and filtering processing on the acquired images, and then performs edge detection to obtain edges of the images of the component; and the size measuring module calculates a pixel value of an edge contour of a measured object through feature extraction, and the pixel value can directly reflect the size of the component through calibration. According to the CMOS-machine-vision-based component size measuring system and the measurement test method disclosed by the invention, the measurement of the contour size can be realized, and the measurement of the aperture of a small through hole can be finished; and after a special assistant tool is provided, the measurement of the bottom width of a trumpet-shaped groove can be realized.

The invention discloses a circuit board testing system and belongs to the field of electronic measurement. The circuit board testing system comprises a slot-0 controller, a PXI bus, a PXI testing module, a testing interface and a tested circuit board; the slot-0 controller is for control, signal interaction and data processing of a measurement test stand; the PXI testing module is used for testing according to function characteristic indexes of the tested circuit board; the PXI bus is used for signal transmitting between the slot-0 controller and the PXI testing module; the testing interface is used for placing the tested circuit board; the slot-0 controller controls the PXI testing module to perform fault diagnosis and performance testing on the tested circuit board which is fixed on the testing interface. The circuit board testing system can achieve automatic testing of integral functions and performance of a PCB (Printed Circuit Board), can provide a measurement report for measure workers and is short in testing period and accurate in testing result.

Battery impedance testing devices, circuits, systems, and related methods are disclosed. An impedance measurement device includes a current driver configured to generate an excitation current signal to be applied to a test battery responsive to a control signal, and a processor operably coupled with the current driver. The processor is configured to generate the control signal during an auto-ranging mode and a measuring mode. The auto-ranging mode applies the excitation current signal to the test battery over a plurality of different amplitudes to measure a response to the excitation current signal at each amplitude. The measuring mode applies the excitation current signal to the test battery for an amplitude responsive to the results of the auto-ranging mode. Improved sensitivity and resolution may be achieved for low impedance batteries with a rapid measurement time.

The invention discloses a wind tunnel dynamic force measurement test device for a canard configuration rotating missile. The device comprises a tail supporting rod, a test missile model, a steering engine driving mechanism, a force measurement balance, a fixed sleeve, an autorotation driving mechanism and a data acquisition and processing system, wherein the test missile model has a cavity and is provided with a deflectable nose control; the steering engine driving mechanism drives the nose control to deflect, and is arranged in the front of the cavity; the fixed sleeve is arranged in the back of the cavity, the rear end of the fixed sleeve is connected to the front end of the force measurement balance, and the test missile model is rotationally sleeved outside the fixed sleeve; the autorotation driving mechanism is arranged inside the fixed sleeve, and a power output shaft extends out of a front opening of the fixed sleeve and drives the test missile model to rotate; and the data acquisition and processing system is in communication connection to the force measurement balance to receive force measurement data of the force measurement balance. The device realizes autorotation of the canard configuration rotating missile and deflection of the nose control, realizes measurement of aerodynamic force and torque, and is particularly suitable for force measurement test of large length-diameter ratio test missile models in 1.2m sub-trans-supersonic wind tunnels.

A semiconductor memory device includes a reference signal generating unit for generating a reference signal; a comparing unit for comparing the reference signal with a test signal applied to a test pad to output an adjusted value after adjusting the adjusted value until the test signal is equal to the reference signal; an impedance measuring unit for measuring an impedance of the test pad based on the adjusted value to output the test signal; an impedance adjusting unit for adjusting an impedance of a data I / O pad to have an impedance value corresponding to the adjusted value outputted when the test signal is equal to the reference signal; an impedance control unit for controlling the comparing unit so that the adjusted value is outputted when the test signal is equal to the reference signal; and a reference signal control unit for adjusting a voltage level of the reference signal.