269 results about "Measurement testing" patented technology

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.

The invention relates to a method and apparatus for determining a chemical component from a sample, where the sample is measured on a test strip with the help of a color reaction. The method concerns finding the measurement time Tm for measuring the reflection of the test strip. The method comprises the following steps: a) Recording the R(t) function, b) Determining the T0 starting time at the detection of the wetting through of the sample, c) Generating the function R(t)+L(t), d) Monitoring and storing the ext[R(t)+L(t)] extreme value of the R(t)+L(t) function, and, at the same time, e) Generating the function R(t)+L(t)-ext[R(t)+L(t)] from the time of reaching an ext[R(t)+L(t)] extreme value, f) when the R(t)+L(t)-ext[R(t)+L(t)] function reaches a predetermined C(t) value, determining the Tm measuring time.

The system is composed of measuring devices (including transceiver, analytic unit, and com. control unit) located at two ends of route of network to be tested, and feedback device (including feedback unit and com. control unit). The transceiver and feedback unit realizes interaction of testing stream between two ends of route of network, and fills in tested data for each packet in testing procedure. Being connected to each other, com. control units at two ends control and implement interaction of test data. Test stream is a string of test packet pair. Each test packet pair is back-to-back two packets with small length. If a packet is lost, the other packet is in use for representing time delay. Thus, time delay and packet lose can be measured. Analytic unit carries out associative analysis for the said two kinds of measured data, and evaluate overall state as well as determines and distinguish different causes for packet lose and congestion fault, and shows analytic result.

A portable system and method for measuring the concentration of multiple chemical or biological substances where an onsite analysis of such substances is needed. The new and original handheld sensor system uses a disposable optical test element and a spectroscopic detector that measures the test element response to specific analytes through a change in light absorbance, luminescence, and other forms of light-based response. In this way, reflection light intensities indicative of the test element response can be used to measure the concentration of the target analytes. The sensor system is also capable of being interfaced to an information processing unit or computer so that analytical data can be manipulated or stored electronically.

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.

The invention discloses a system for measuring the normal spectral emissivity of a high-temperature material, comprising a vacuum heating unit, a water cooling sleeve unit, an optical fiber sensor measurement unit and a data acquisition and analysis unit, wherein a test sample is arranged on the upper part of the vacuum heating unit, and the vacuum heating unit performs radiant heating on the lower surface of the test sample; the water cooling sleeve unit is sleeved on the upper part of the test sample, and the upper surface of the test sample is placed in a constant-temperature cold environment; the optical fiber sensor measurement unit is arranged above the test sample to measure the normal spectral radiant intensity of the upper surface of the test sample; and the data acquisition and analysis unit is connected with the optical fiber sensor measurement unit and is used for calculating the normal spectral emissivity through a multi-spectrum inversion algorithm according to the measured normal spectral radiant intensity. The invention realizes material normal spectral emissivity measurement in a spectrum range of 0.4-1.7mum and a temperature range of 600-1,500 DEG C without on-line radiometric calibration, is accurate and reliable to realize the technology, and overcomes limitations on high price, complicated structure, high difficulty in technical implementation and other applications of the conventional spectral emissivity device.

The invention provides a measurement testing device of external characteristics and internal flow of a fused salt model pump. The measurement testing device of external characteristics and internal flow of the fused salt model pump is mainly used for measuring the external characteristics and an internal velocity field of the fused salt model pump, and carrying out shooting and research of high-speed flow inside the fused salt model pump. The measurement testing device of external characteristics and internal flow of the fused salt model pump mainly comprises a pipeline system, a power transmission system, a model pump, an external characteristic data acquisition and analysis system and an internal flow measurement system. Arrangement of the pipeline system ensures an enough operating space, high measurement accuracy and convenience of testing when tests are carried out. The power transmission system provides power for stable operation of the fused salt model pump. An impeller and a pump supporting seat of the fused salt model pump are made of stainless steel, other components of the fused salt model pump are made of organic glass, and the fused salt model pump has the advantages of being good in hydraulic performance, high in strength, wide in measurable area and the like. The external characteristic data acquisition and analysis system collects signals of pressure, revolving speed, torque, flow and the like, the signals are processed and analyzed, and the external characteristics of the fused salt model pump are obtained. The internal flow measurement system can carry out peak inverse voltage (PIV) measurement to the internal velocity field of the fused salt model pump, carries out internal peeping high-speed imaging to internal flow of the fused salt model pump, and achieves research of an internal whole flow field of fused salt model pump.

Systems and methods are provided for determining pre-cognitive and / or cognitive emotional response to predetermined olfactory stimuli. Among other things, the invention may include exposing a test subject to a controlled flow of a predetermined olfactory stimulus, measuring eye data (e.g., using an eye tracking device) corresponding to when the olfactory stimulus reached the subject's nose, and analyzing and processing the eye data for determining the subject's emotional response to the olfactory stimulus. In some implementations, the invention may include measuring the test subject's respiratory parameters so as to deliver the predetermined olfactory stimulus at a certain point in the test subjects respiratory cycle.

A gas detector capable of accurately measuring particular components (odors or the like) contained in an ambient gas to be measured, being compact, and capable of being easily formed to be portable, or producing low noise and capable of being small-sized. Having zero gas cylinder (9) as a supplying unit of a zero gas and component parts disposed within its enclosure (2) and using syringe (3) as a gas intake / exhaust unit, it alternately introduces a test gas, i.e., an ambient gas taken in from outside enclosure (2) through piping (12a), and the zero gas supplied from zero gas cylinder (9) into sensor unit (7) and measures the test gas, while having operation of each unit controlled by data processor (11). Thus, accurate measurement of the test gas is achieved by relatively comparing results of measurement on the gases at each measurement. In addition, gas detector (1) can be moved to a spot where measurement is to be made to have the test gas there measured. Further, by use of a cylinder mechanism producing low noise, the detector can quantify gas intake / exhaust and can be made small in size.

An apparatus (402) and method for measuring a surface energy of a test surface (12), which includes a viscoelastic polymer layer (20), disposed on a moveable component (34), that is compressed against the test surface (12) with a compressive force. The moveable component (34) is then moved relative to the test surface (12) at a predetermined velocity, and a drive force applied to the moveable component (34) is measured. The surface energy of the test surface (12) is then determined based at least in part on the compressive force, the predetermined velocity, and the measured drive force.

The device is used for the automatic determination of characteristics on textile test material such as yarns, rovings, and slivers. A path is provided for the test material, through which path the test material is moved in its longitudinal direction. At least one measuring element for measuring a parameter of the test material is arranged along the path. In order to reduce the depositing of loose fibres, dust, or dirt particles, a plurality of suction elements, which are arranged along the path and spaced apart from one another, are provided and generate a vacuum, by means of which the undesired particles are sucked from the path.

The present invention belongs to the field of automobile detection. The failure detecting device for automobile damper features the digital frequency variator, rather than energy accumulating flywheel, used for altering the rotation speed of AC motor for excitation of different frequency; and the increased displacement sensor used for measuring the displacement of the test stage. New failure detecting method is realized with the device. The present invention evaluates automobile damper with two evaluation indexes including additional percentage A and damping ratio zeta to raise the measuring accuracy.

This invention relates to magnetic liquid surface viscosity test meter and its method, which adopts adjustable magnetic stator and rotor axis with high conductive magnetic cover matched with temperature measurement device and non-contact speed meter. The device is located with high conductive magnetic cover and adjustable permanent magnetic iron stator with liquid gap and the temperature measurement device and the stators are located with multiple heat couple through rotation axis moving in the stators and adopt direct current constant torque motor speed changes to test torque and adopts imbedded magnetic to control added magnetic field with the magnetic field direction vertical to the shearing surface to realize the magnetic flow viscosity testing.

A gas flow rate verification apparatus is provided for shared use in a multiple tool semiconductor processing platform. The gas flow rate verification apparatus is defined to measure a pressure rate of rise and temperature within a test volume for determination of a corresponding gas flow rate. The apparatus includes first and second volumes, wherein the second volume is larger than the first volume. The apparatus also includes first and second pressure measurement devices, wherein the second pressure measurement device is capable of measuring higher pressures. Based on the target gas flow rate to be measured, either the first or second volume can be selected as the test volume, and either the first or second pressure measurement device can be selected to measure the pressure in the test volume. Configurability of the apparatus enables accurate measurement of gas flow rates over a broad range and in an time efficient manner.

The invention discloses a correction method for wind tunnel continuous variable-attack-angle force measurement testing data. A correction amount comprises balance signal delay, model self-weight, balance supporting rod elastic corners and model inertia force and centrifugal force. Under the non-wind state, a model runs periodically according to a certain angle interval, in the running process, anattack angle and a balance signal are continuously collected according to a fixed sampling rate, cross-correlation functions of all components of a balance and the attack angle are calculated separately, and precise delay of all the components of the balance relative to the attack angle can be obtained according to peak values of the cross-correlation functions. After self-weight data and testingdata are subjected to digital filtering and delay correction, angle relations between the balance supporting rod elastic corners and all systems of axes are calculated and in combination with balancefiles, and an actual attack angle of the model can be obtained; the self-weight data and the testing data are subjected to interpolation separately at a certain attack angle interval, one kind of interpolation data is subtracted from the other kind of interpolation data, and accordingly correction of self-weight, inertia force and centrifugal force of the model can be conducted at the same time.

A non-invasive device for evaluating circulatory state parameters, and specifically, a pulsewave analysis device capable of evaluation by separating blood vessel compliance and blood vessel resistance into central and peripheral components of the arterial system is provided. Microcomputer 4 detects the waveform at a test subject's radius artery via pulsewave detector 1, and uptakes the stroke volume in the test subject which is measured by a stroke-volume measurer. Next, based on the measured stroke volume, microcomputer 4 adjusts the values of each element in a lumped five parameter model made up of an electrical circuit which models the arterial system from the center to the periphery of the body, so that the response waveform obtained when an electric signal corresponding to the pressure waveform at the proximal portion of the aorta in a test subject is provided to the electric circuit coincides with the waveform at the radius artery. Microcomputer 4 then outputs the thus-obtained values of each element as circulatory state parameters. In addition, microcomputer 4 calculates the diastolic pressure value, systolic pressure value and pulse waveform at the proximal portion of the aorta from the values of each element, and outputs the calculated result to output device 6.

A semiconductor test device includes a test circuit having contacts for applying an electrical signal and measuring electrical parameters of the test circuit. The semiconductor test device also includes an integrally formed heating circuit comprising at least one circuit meander positioned adjacent the test circuit for raising a temperature within a portion of the test circuit.

The invention provides a gait analysis system aiming at small animals (such as mice, cats, chickens, and the like). The gait analysis system comprises a positioning and pressure measuring device, a three-dimensional force measuring device, a track device, a signal processing part and a data analysis and display part, wherein the positioning and pressure measuring device is used for collecting footmarks and contact pressures of a test object in real time; the three-dimensional force measuring device is used for measuring parameters of three-dimensional force, and the like of the test object in still and walking processes; the track device is used for inducing and controlling creeping actions of the test object; the signal processing part is used for carrying out amplification, filtering, analog digital conversion, and the like on caught original signals; and the data analysis and display part is used for further calculating gait parameters of step lengths, step frequencies, center-of-gravity shifts, and the like according to measured data and displaying results. The gait analysis system can quantitatively evaluate the gait of the test object, comprising the gait parameters of the step frequencies, the step lengths, distances among limbs, the pressure, the center-of-gravity shift, and the like, and can measure the gait parameters of the test object in a state of a slope or touchdown only by posterior limbs through the preset track.

A method for prognosing possible recurrence after treatment of the liver cancer, characterized by measuring GPC3 contained in a test sample by use of an anti-GPC3 antibody.

A method for predicting preliminary design load cases using an artificial neural network, the method including obtaining, with a processor, historical data corresponding to an existing structural component, the historical data including finite element modeling analysis data and measured test data for the existing structural component, designing the artificial neural network to include a plurality of neurons to form a numerical model for preliminary design load cases of a new structural component, training, with the processor and the historical data for the existing structural component, the artificial neural network to predict the preliminary design load cases for the new structural component, providing input design parameters for the new structural component to the artificial neural network, and predicting, with the artificial neural network, the preliminary design load cases for the new structural component.

The invention provides a method for indirectly measuring effective thrust of an engine. The method is used for measuring effective thrust of the engine of an aspiration-type integrated aircraft. The aircraft is a flow passage model. An engine-containing aircraft is subjected to thrust-to-drag feature measurement testing in a wind tunnel. Wind tunnel testing meets simulation rules of pneumatic and engine testing at the same time. In the test, an engine ignites to start combustion. A wind tunnel balance measures aircraft total thrust F balance total thrust, and the aircraft total thrust F(balance total thrust) is added with body drag D(external resistance) obtained by calculation or measurement so as to obtain effective thrust of the engine. Calculation of cold-state internal resistance is omitted, the effective thrust of the engine is obtained by adding the total thrust measured by thermal state testing with the body drag outside a flow channel, and the accuracy of measuring the effective thrust of the engine of the aspiration-type integrated aircraft is improved.

The invention relates to a method and a device for measuring the dynamic stiffness of a resilient element. The dynamic stiffness of a resilient element is measured using an excitation point measurement method in ISO 10846-5. First, the dynamic stiffness k11 of an excitation point is obtained. Then, the test system equivalent vibration mass inertia stiffness Omega<2>m1 and the test system equivalent support stiffness ki are measured, and the dynamic stiffness k21 of the resilient element after modification is calculated according to the formula: k21=k11+Omega<2>m1-ki. In addition to devices adopted in the excitation point measurement method in ISO 10846-5, the device comprises a single-frequency resonant signal generator (101), a power amplifier (102), an isolation spring upper positioning plate (107), an isolation spring lower positioning plate (108), a force sensor (109), an acceleration sensor (110), and a signal conditioning, collecting and processing system (112). Compared with the prior art, through second measurement carried out on the basis of first measurement, the accuracy of the dynamic stiffness measurement result and the applicable frequency range are improved effectively.

The invention provides a micro force measuring device, belongs to the technical field of micro force value calibration and measurement testing, and aims to solve the problems that the structure is complex, the action line of the force cannot be fixed easily, and the cost is high in the prior art. The micro force measuring device comprises an unequal arm balance, a force value replication device, a micro-displacement measuring device and a computer control system, wherein a tray is arranged at a long arm end part of the unequal arm balance; an edge cutter structure is arranged at a short arm end part; the edge cutter structure is connected with the micro-displacement measuring device through the force value replication device; the output end of the micro-displacement measuring device is connected with an insulating rod through a connecting sleeve; and the insulating rod is connected with a threaded hole in an upper end cover of an inner electrode of the force value replication device. According to the micro force measuring device, the force value replication device is used for replicating a micro force value, relative micro displacement of the inner electrode is measured through an improved digital display micrometer, the force value change is changed into the precision capacitance gradient change of an electricity quantity relative to the displacement, balance is formed through a lever structure and a standard weight dead weight force, the structure is simple, and the cost is lower.

A multi-functional precious stone testing apparatus includes a microcontroller, a measuring unit for measuring properties of the testing object, and a functional unit. The measuring unit is arranged to measure one of a combination of ultraviolet and infrared distributions of the testing object and a combination of thermal and electrical conductivities of the testing object. The microcontroller analyzes a result from the measuring unit to generate a test result of the testing object, wherein the microcontroller includes a communication unit for connecting with an electronic device to transmit the test result thereto. The functional unit includes a voice indicator that generates a voice indication signal of the test result.

A method is disclosed for measuring components (1) using a measurement system (20) guided by a manipulator (10). In this process, reference features (9, 9a, . . . , 9i) are decentrally located at various positions near a component (1) to be measured, the reference features each being assigned to at least one measuring object (6) located at a close distance to the particular reference feature (9, 9a, . . . , 9i) on the component (1) to be measured. Before a test object (6) is measured, the measuring system (20) is first brought into a calibration position using the manipulator (10), and the reference feature (9, 9a, . . . , 9i) assigned to the particular test object (6) is measured using the measuring system (20) to calibrate a coordinate system of the manipulator (10). Using the manipulator (10), the measuring system (20) is then moved into a measurement position, where the relevant test object (6) is measured. A corresponding device for measuring components and a component carrier (7) are also disclosed.