76 results about "Measurement testing" patented technology

The invention belongs to the technical field of physiological parameter measurement and testing, and discloses a multi-mode optical non-contact health monitoring system and method. The system comprises a sensing measurement module, a data synchronous acquisition module, a micro-motion stabilization and correction module, a three-dimensional trajectory reconstruction module, a multi-modal data processing module and a physiological index calculation module. Optical imaging data are processed preferentially through a U-Net network and then fused with video micro-motion features, and the problem of multi-modal data coupling interference in a traditional method is solved. A mathematical mapping relation between blood flow parameters and physiological indexes is established through a diffusion optical spectrum mapping network, the segmented blood flow parameters are mapped to initial physiological indexes, and the time lag problem of single-modal data is solved through time sequence features extracted through a time sequence feature fusion network. And the weights of the time sequence characteristics and the preliminary physiological indexes are dynamically adjusted through a space-time attention mechanism, so that the robustness in a complex environment is enhanced, and the prediction precision and stability of a non-contact health monitoring system are improved.

Systems and methods for materials testing include mage devices employing camera based image capture (e.g., vision or video) for measurement of strain on the test specimen. Such systems and methods collect multiple images of the specimen under test (i.e. during a testing process), with the images being synchronized with other signals of interest for the test (such as specimen load, machine actuator and / or crosshead displacement, etc.). The images of the specimen are analyzed (e.g., in real-time and / or post-test) by algorithms to locate and track specific specimen characteristics as the test progresses.

The utility model provides a rapid positioning precision detection device, which comprises a calibration seat, a test board and a pointer, the center of the calibration seat is provided with a mounting hole, a horizontal mounting part and a vertical mounting part are arranged in the mounting hole, the test board is arranged on the horizontal mounting part or the vertical mounting part, and the pointer is arranged on the test board. The pointer penetrates through the center of the test plate, the pointer is perpendicular to the test plate, and two ends of the pointer respectively extend out of the test plate. The calibration device has the advantages that the calibration seat is matched with the test plate to be directly placed on the treatment head, the center of the test plate is ensured to be overlapped with the actual focus of the treatment head through processing precision, and the calibration accuracy is improved; the positioning precision result can be obtained only by measuring the distance between the center of the test board and the theoretical focus on the software treatment interface through the measurement function of the treatment software, and the operation is simple and convenient.

The invention discloses a system and a method for testing the vacuum thermal sublimation loss rate of ice-containing soil, and belongs to the technical field of vacuum thermal sublimation simulation experiments of space exploration. The test system comprises a data acquisition system, a sample preparation chamber, a first vacuum low-temperature chamber, a second vacuum chamber and an in-place detection simulation vacuum chamber, and can timely place a prepared sample in a test condition, so that the prepared sample is prevented from changing in advance when not entering the simulation vacuum chamber; therefore, the initial condition of the sample is effectively controlled, the accuracy and repeatability of measured data are ensured, meanwhile, the change process of the monitored sample from the initial state to the target condition can be implemented, and in-situ measurement is realized. The test method comprises the influence of factors such as heating temperature, star soil heap type, sample throwing, sample physical property parameters and the like on the vacuum thermally-induced sublimation loss rate of the ice-containing star soil, provides correction parameters for the real water content of the original star soil, and also provides data support for improving the extraction efficiency of lunar soil water ice.

Methods for compensating measurements of devices under test (DUTs) captured through prescription lenses (and associated imaging systems, devices, and methods) are described herein. In one embodiment, a method for characterizing focus quality of a DUT through a prescription lens includes adjusting an optical power of a measurement device to compensate for optical power provided by the prescription lens. The method further comprises imaging, using the measurement device, a test pattern through the prescription lens, wherein the test pattern is displayed by the DUT; measuring contrast of an edge in the test pattern at a point of interest within the imaging of the test pattern; and determining focus quality of the DUT based at least in part on the contrast measurement.

A meter (1) comprising a phase conductor (10) connected to a phase line of a network, a disconnecting member (12) and a detection circuit, comprising: an injection chain (15) arranged to generate a test signal (St) having a predetermined voltage level when the disconnecting member is open, and arranged to inject the test signal into the phase conductor downstream of the disconnecting member; a measurement chain (16) arranged to measure an intermediate voltage level of the test signal at a measurement point (Pm) of the injection chain, the point being located between the generator assembly and the injection assembly; a processor assembly (17) arranged to act on the intermediate voltage level in order to determine whether the circuit breaker is open or closed.

The invention discloses an accurate measurement device and method based on water tunnel flow field resistance, and relates to the technical field of flow field medium measurement. Comprising a working section and a test board. The working section is internally provided with a testing assembly for testing the flow field medium resistance of the testing plate; the test assembly comprises a fixed plate; sensor fixing seats are symmetrically and fixedly connected to the fixing plate, force sensors are fixedly connected to the sensor fixing seats, and the force sensors are used for detecting the force values of a flow field medium in the working section acting on the X-axis direction and the Y-axis direction of the testing plate; the force sensors are fixedly connected with connecting plates. An adjusting assembly used for adjusting the height of the testing plate is arranged between the testing plate and the connecting plates. The force measuring directions of the Y-axis directions of the adjacent force sensors are opposite, and the force value output by the S-shaped force sensor is the resultant force of the X-axis direction and the Y-axis direction; the horizontal resistance of a flow field medium borne by the test plate can be accurately measured, meanwhile, the pressure difference interference force in the vertical direction is effectively counteracted, and the resistance test precision and stability are improved.

The application relates to the field of measurement testing technology, and specifically discloses a self-adaptive hole-forming quality detection device and system, which comprises a main controller, a plurality of intelligent modules electrically connected with the main controller and axially rotatably connected with the main controller, any intelligent module comprises a shell, a plurality of arm joints are arranged on the side wall of the shell in a circumferential array, a collection conversion module for connecting at least one stroke sensor and a pressure sensor is arranged in the shell, a self-adaptive elongated arm mechanism is arranged on the arm joint, the free end of the arm mechanism is provided with the stroke sensor, and the stroke sensor is in abutting contact with the inner wall of a hole; and any pressure sensor is embeddedly arranged on the inner wall of the hole. According to the application, the space-time distribution relationship between deformation and stress is analyzed in cooperation, not only can the abnormal area be positioned, but also the precursors of stress release and displacement increase representing instability can be reflected, so that the scientific inference and accurate prediction of the hole collapse position, range and even direction can be realized.

The present disclosure relates to a measurement device for characterizing a device-under-test, DUT. The device includes an RF signal generator to generate test signals in parallel. The test signals each have a different frequency. A signal path connects the RF signal generator to a port of the measurement device. The port is connected to the DUT. The signal path feeds test signals to the port and receives response signals of the DUT from the port. The device includes a measurement unit; a forward coupler connected to the signal path and forwards at least a part of each of the test signals to the measurement unit; and a reverse coupler is connected to the signal path and forwards at least a part of the response signals to the measurement unit. The measurement unit simultaneously measures the forwarded parts of the test and response signals, each in amplitude and phase.

A method for software-based planning of a dimensional measurement of a measurement object includes receiving an input command for selecting at least one measurement element of the measurement object that is to be measured during the measurement. The method includes determining a selection of measurable test features of the at least one selected measurement element. Each of the test features includes a dimensionally measurable measurand of the at least one selected measurement element. The method includes determining a reduced subset of the selection of measurable test features depending on a view currently chosen on a display. The method includes visualizing the test features contained in the reduced subset by generating a graphical representation of each of the test features contained in the reduced subset on the display.

A measuring apparatus for electrodes and / or separator membranes for secondary batteries according to one embodiment of the present invention includes a container with a main body capable of housing a test piece and an electrolyte, and a measuring unit for measuring the physical properties of the test piece, wherein the test piece is at least one of an electrode and a separator membrane for secondary batteries, and the measurement is performed with the test piece impregnated in the electrolyte.

The invention discloses an error calculation method based on a pulse sequence with a time scale, and belongs to the technical field of electric power measurement testing. The standard time-frequency signal, a high-frequency standard pulse output by the standard electric energy meter and a detected pulse output by the detected electric energy meter are connected to an acquisition processor; the acquisition processor detects a jump edge of the detected pulse in real time based on a clock provided by the standard time frequency signal, and records moments corresponding to a rising edge and a falling edge of the detected pulse; counting the standard pulse in real time, and recording the current count value of the standard pulse at the corresponding moment; combining the moment information with the count value to form an original sampling sequence with a time mark; the calculation processor reads the stored original sampling sequence with the time scale, and calculates the power value, the error value, the waveform characteristic and the jitter index of the detected electric energy meter according to the edge moment of the detected pulse and the corresponding standard pulse count value; and according to the error distribution condition, the stable state of the verification system is monitored in real time, and an alarm is dynamically triggered.

The invention discloses a coupling coefficient measurement method based on an identical waveguide array, and belongs to the field of optical waveguide property measurement and test, and the method comprises the steps: building a waveguide array coupling coefficient measurement system; testing an evolution result of the waveguide array; reversely deducing a coupling coefficient through a simulation experiment; according to the invention, based on the consistency of the evolution process of photons in a waveguide array and quantum walking in continuous time, an identical single-mode waveguide array is adopted, according to a physical model of quantum walking in continuous time, output probability amplitudes under different evolution lengths are measured, and a least square method is combined to evaluate simulation and test results; and finally obtaining the coupling coefficient of the waveguide. The method is low in requirement on experimental equipment, small in workload and less in required sample width; and the evolution condition of the light in the waveguide array can be accurately predicted and analyzed.

The invention provides an oil and gas well segmented testing device and method, and relates to the technical field of oil and gas well testing, the device comprises a sleeve, a fracturing bridge plug and a testing short section device, and the testing short section device is connected to the lower portion of the fracturing bridge plug and goes down to a preset position in a well along with the bridge plug. The test short section device is of a cage type structure, a battery, a timer, a holding claw, a pull rod, a motor pulling cylinder and a plugging device are arranged in the test short section device, the timer is used for controlling the gear motor pulling cylinder to act, the pull rod pulls the holding claw to rotate, the plugging device is released, a bridge plug center hole is plugged, and a flowing channel is closed; the testing method comprises the steps of collecting drainage and production data of adjacent wells to determine plugging time; designing a test short section and setting the starting time of a timer; the device is connected with a bridge plug to descend into a well, and staged fracturing is completed; sequentially starting timers after oil-gas well liquid drainage production, blocking section by section, recording wellhead yield data, and calculating the productivity of each section; according to the method, measurement is directly performed through physical isolation, the test result is visual and reliable, the anti-interference capability is high, the cost is low, and the method is suitable for output monitoring of low-permeability and unconventional reservoir staged fractured wells.

The invention discloses a trimming test device and a trimming test method. According to the embodiment of the invention, the trimming test device comprises a resistance measurement unit, a test sub-circuit and a trimming unit, wherein the resistance measurement unit is used for measuring the resistance value of the test sub-circuit; and the laser head emits laser to the test sub-circuit so as to heat the test sub-circuit, and the trimming result is judged according to the resistance value of the test sub-circuit. According to the trimming test device and the trimming test method provided by the embodiment of the invention, the time required by the whole test is greatly shortened.

The present invention relates to a method for acoustically measuring material properties of a test piece at high temperatures, comprising the following steps: a. heating the test piece to a test temperature range; b. performing background measurements within the test temperature range by collecting vibration signals of the test piece during a calibration period, thereby obtaining a noise signal; c. performing acoustic measurements on the test piece within the test temperature range and during a test period by: c. applying a vibration excitation to the test piece; c. collecting vibration signals of the test piece during the test period, thereby obtaining a vibration response signal to the vibration excitation; and d. obtaining material properties of the test piece by analyzing the vibration response signal, thereby taking the noise signal into account. The present invention also relates to a system for acoustically measuring material properties of a test piece at high temperatures.

Health management device that features: an acquisition unit configured to obtain biological information from a measurement test subject; a unit of determination configured to determine whether the acquired biological information reaches a target value, defined in relation to the biological information, within a specified time period; and a calculation unit configured to calculate an incentive value for the measurement test subject based on a determination result obtained from the determination unit and a number of biological information objects, wherein the acquisition unit also obtains health information indicating the health status of the measurement test subject, the unit of determination determines whether the obtained biological information meets a specified condition or not, which is based on the obtained health information, wherein the specified condition includes a time of day at which blood pressure tends to be high, and The calculation unit further calculates the incentive value for the measurement test subject based on a number of biological information objects for which the determination unit has determined that they meet the condition.

The invention discloses an object surface radiation heat dissipation performance testing device which comprises a shell, a testing area is arranged on the inner wall of the shell, a heating piece is arranged in the testing area, and a to-be-tested sample can be placed at the end of the heating piece; the testing area can simulate the working environment of different samples to be tested through the temperature change of the heating piece; a first temperature sensing piece is arranged in the testing area, and the first temperature sensing piece is used for measuring the temperature value in the testing area; a second temperature sensing piece is arranged on the surface of the to-be-tested sample, and the second temperature sensing piece is used for testing the temperature of the surface of the to-be-tested sample, so that the heat dissipation performance of the metal working at high temperature is represented; by arranging the heating plate capable of accurately controlling the temperature and the built-in first temperature sensing piece, active and accurate simulation of the working temperature of a metal or coating material sample is realized, and the limitation that an existing testing device is only suitable for environment temperature or low-temperature scenes is broken through.

The invention relates to a magnetic flux modulation type high-intensity magnetic field measuring device and method based on self-reference, and relates to the field of metering and testing instruments. Comprising the steps that a motor drives a transmission shaft to control an induction coil to rotate in a strong magnet, two paths of homologous and synchronous induced electromotive force E1 are generated, the induced electromotive force E2 is output through a twisted pair in a conductive slip ring and input into a first signal conditioning module and a second signal conditioning module respectively, and the conditioned induced electromotive force E1 is input into a precise voltage division network for voltage division; the induced electromotive force after voltage division is input into a lock-in amplifier reading system through a first voltage follower to serve as a signal to be measured; the conditioned induced electromotive force E2 is synchronously input into a waveform shaping circuit to be converted into a square wave signal with a fixed amplitude value, the square wave signal after conversion is input into a phase-locked amplifier reading system through a second voltage follower to serve as a reference signal, and the phase-locked amplifier reading system carries out data reading on the induced electromotive force. According to the invention, the problem that the high-intensity magnetic field is difficult to accurately measure and trace is solved.

According to the present invention there is provided a method for determining kinetic parameters of a reaction between analyte and ligands, the method comprising the steps of, a) flowing a first volume of sample fluid (V1), which has a concentration (co) of analytes, over a test surface (3) of a flow cell (2) which has first ligands (4) attached thereto, for a first time period (tia); b) flowing a first volume of buffer solution (X / Γ) over the test surface (3) of the flow cell (2), for a first time period (tib); c) flowing at least a second volume of sample fluid (V2), over the test surface, for a second time period (t2a); wherein the second time period (t2a) is greater than the first time period (tia) and wherein the second volume of sample fluid (V2) has the same concentration (c0) of analytes as the concentration (c0) of analytes in the first volume of sample fluid (V2); d) flowing a second volume of buffer solution (V2′) over the test surface (3) of the flow cell (2), for a second time period (t2b); e) using a sensor to measure the binding on the test surface (3) during steps (a)-(d) to obtain a single measurement binding curve; f) flowing a first volume of sample fluid (V1), which has a concentration (Co) of analytes, over a test surface (3′) of a flow cell (2′) which is without first ligands, for a first time period (tia); g) flowing a first volume of buffer solution (X / Γ) over the test surface (3′) which is without first ligands, for a first time period (fib); h) flowing at least a second volume of sample fluid (V2), over the test surface (3′) which is without first ligands, for a second time period (t2a); wherein the second time period (t2a) is greater than the first time period (t1a) and wherein the second volume of sample fluid (V2) has the same concentration (c0) of analytes as the concentration (c0) of analytes in the first volume of sample fluid (V2); i) flowing a second volume of buffer solution (V2′) over the test surface (3) which is without first ligands, for a second time period (t2b); J) using a sensor to measure the binding on the test surface (3) which is without first ligands, during steps (f)-(i), to obtain a single reference binding curve; k) Using the single measurement binding curve and the single reference binding curve to determine the kinetic parameters.

The invention relates to the technical field of measurement and testing, and discloses a pulse ultrasonic sensing device and method for fluid anomaly detection, and the method comprises the steps: a programmable pulse generator in an application-specific integrated circuit generates a short pulse sequence with preset parameters, and the short pulse sequence is amplified by a power amplifier and then is transmitted to a fluid medium by an ultrasonic transducer. In a transmitting gap, the transmitting-receiving switching circuit switches the system to a receiving mode, and echo signals are conditioned through the low-noise preamplifier, the programmable band-pass filter and the automatic gain control circuit in sequence. The conditioned signals are digitalized through an analog-to-digital converter array, pulse shaping, time sequence alignment, signal accumulation and digital filtering operation are carried out in a digital processing module, then signal envelopes are extracted by an envelope detector, feature vectors are calculated, and finally abnormity judgment is carried out by a judgment logic unit. According to the invention, rapid ultrasonic detection and accurate judgment of abnormal signals are effectively realized.

The present application provides a kind of pipeline vibration test section load non-contact high-speed test method, belong to measurement testing field, including the following steps: first step: test system setup;Second step: test image acquisition;Third step: deformation field calculation;Fourth step: reflection transformation calculation;Fifth step: pipeline full circumferential surface morphology reconstruction;Sixth step: deformation field measurement;From the three-dimensional point cloud of initial state in the three-dimensional point cloud of deformation state, obtain the three-dimensional displacement field of each deformation state, further calculate three-dimensional displacement field, obtain the required strain field;Seventh step: pipeline section stiffness coefficient calibration;Eighth step: based on single system multi-view pipeline full circumferential deformation test method, the deformation information under pipeline section load is collected, and section load data is calculated according to section stiffness coefficient data and strain data, complete test.The present application solves the problem of low test reliability and measurement accuracy caused by the quality of sensor and wire itself in the prior art.

Various embodiments described herein relate to a test chamber device an associated methods and non-transitory machine-readable media including a test chamber, a system builder that is configured to build and apply an equipment load to the test chamber; a load maker that is configured to build and apply a predefined load to the test chamber; and a tester which measures action of the equipment load and the predefined load within the test chamber, producing a test state.

The application relates to a method for measuring system loss in a test system in a radio frequency chip finished product test, comprising the following steps: providing a standard chip with a standard test value; inputting a radio frequency signal to the standard chip through a test machine; measuring an output end of a test circuit board to obtain an output test value; determining a test difference value of the output test value and the standard test value, and judging to determine system output loss. The application also relates to a finished product test method, equipment, medium and product for a radio frequency chip.

The measurement apparatus includes a measurement test selection unit that selects a test item to be measured, a measurement condition analysis unit that analyzes a measurement condition of the selected test item, a wiring condition selection unit that inputs a frequency band to be measured and an antenna terminal of a mobile terminal to be used in the frequency band as a wiring condition for the selected test item, a recommended wiring calculation unit that calculates a wiring method that satisfies the wiring condition and the measurement condition and minimizes the number of times of reconnection to the cable between the port of the measurement device and the antenna terminal of the mobile terminal, and a wiring method display unit that displays the wiring method calculated by the recommended wiring calculation unit as a wiring diagram.

The invention provides a corrosion monitoring system based on radio frequency impedance change, which comprises the following steps: firstly, measuring the self impedance of a test system, then measuring the impedance of a metal pipe to be measured, and analyzing and prompting the corrosion condition according to the change condition of the monitored impedance in the later period; that is to say, the corrosion state of the metal pipeline can be recorded and analyzed by measuring the impedance, the accuracy of the test result is higher than 90%, and the repeatability is good; the testing method is simple and easy to operate on a platform, meanwhile, the corrosion condition of a pipeline system can be managed, regular testing and dynamic management are achieved, and support is provided for metal pipeline maintenance; in addition, the testing system is simple in structure and easy and convenient to operate, and portable measuring equipment can be developed. Finally, the framework of the testing system is mature, and a large-scale corrosion monitoring system can be developed.

The invention belongs to the technical field of density screening, and discloses solid sample density screening equipment, which comprises a test liquid and a container for accommodating the test liquid, and the density of the test liquid determines the floating and sinking states of a solid sample in the test liquid; the wall of the container is provided with a temperature sensor and a sensor used for measuring the liquid level of the container in the depth direction, and the temperature sensor is used for measuring the temperature of the test liquid. According to the method, density screening can be rapidly carried out on the solid samples, the detection efficiency is greatly improved, the requirement for real-time rapid detection on a large-scale production line can be met, compared with a traditional detection method, the detection time can be shortened by several times or even dozens of times, specifically, the solid samples are rapidly and accurately screened through the buoyancy law, and the detection efficiency is greatly improved. The solid sample with the density smaller than that of the testing liquid floats upwards, and the solid sample with the density larger than that of the testing liquid sinks.

The invention discloses landfill settlement measurement equipment and a measurement method, relates to the technical field of measurement and testing, and is simple to operate, high in randomness and accurate and wide in measurement result. Comprising a movable monitoring point arranged in a landfill and a plurality of measuring points randomly arranged in the landfill, the monitoring point comprises a base, and a fixed first laser range finder and a rotatable second laser range finder are arranged on the base; a first signal receiver used for receiving signals of the first laser range finders is fixedly arranged on one side of the landfill, the base can move front and back relative to the signal receiver in the landfill, the measuring points are a plurality of measuring rods arranged in the landfill, and second signal receivers used for receiving signals of the second laser range finders are arranged on the measuring rods. A signal receiving plate is arranged on the base and located below the first laser range finder and the second laser range finder, and an infrared sensor facing the signal receiving plate is fixedly arranged on the second laser range finder.

The invention relates to a leak detection system (1) for checking the tightness of an object (20) having at least one expandable flexible wall, said system comprising: – a sealed test chamber (101) configured to receive / accommodate the object (20) to be tested; – a device for pressurizing the internal volume of the test chamber (101) to a first test pressure value P1; – a device for pressurizing the internal volume of the object to be tested (20) to a second test pressure value P2, distinct from the first test pressure value P1; – a first sensor (103) for measuring a first leak level F1 in the test chamber (101), this determination being carried out by measuring a physical quantity representative of the leak level as a function of time;– a second measuring sensor (203) for a second leakage level F2 of the object to be tested (20), this determination being carried out by measuring a physical quantity representative of the leakage level as a function of time; – an electronic entity (30) configured to determine an actual leakage Freal in the object to be tested (20) as a function of the first and second test pressure values ​​P1, P2, and the first and second leakage levels F1, F2 measured synchronously over the same test time interval ttest, respectively by the first and second measuring sensors (103, 203; 103', 203'). Figure for the abstract: [Fig. 1];

This invention provides a method for measuring and evaluating stress concentration in a cage-type elastic support, belonging to the field of measurement and testing technology. The method includes the following steps: First, determining the stiffness of the elastic support through calibration tests; second, calculating the stress distribution formula of the cage bars based on their structural dimensions; third, obtaining the analytical solution for stress concentration using the multivariate function extremum method; fourth, obtaining the theoretical solution for the strain gauge measurement range using the area integral method; and fifth, measuring, evaluating, and correcting the stress concentration to obtain the measured value of the stress concentration in the cage bars. This invention solves the problem of inaccurate measurement location and data in existing technologies when measuring stress concentration at the root of the cage bars, providing accurate data support for the structural strength design and fatigue life estimation of elastic supports.