32 results about "Test sensitivity" patented technology

The disclosure relates to formulations and methods for the in vitro testing of ocular irritants. It was discovered that adding an antioxidant formulation to in vitro ocular irritation tests, including for example, a biochemical ocular irritation test, a reconstituted human corneal epithelium (RhCE) ocular irritation test and an excised eye depth of injury (Dol) test, substantially reduces the rate of false positives without diminishing test sensitivity, resulting in more accurately predicting ocular irritancy of test substances. More particularly, the disclosed method employs relatively high physiologic concentrations of one or more antioxidants that are normally present in tears. In a variation, much higher concentrations of one or more antioxidants may provide protection against in vivo exposure to ocular irritants.

[Problem] In fields such as tumor marker test and pregnancy test kit, it is known to concentrate a target component (protein) by utilizing a superabsorbent polymer (SAP) as a method for improving test sensitivity. However, due to the powder form, SAP exhibits difficulties in handleability and formability and also causes problems such as falling off. Furthermore, the concentration effect is hardly at a sufficient level. The present invention has been made in view of such problems and on the basis of the discovery that a fiber containing an ammonium salt-type carboxyl group and a crosslinked structure serves as a material for protein concentration having excellent handleability and formability, in addition to having a high protein concentration effect. [Solution] A fiber for protein concentration is a fiber that contains an ammonium salt-type carboxyl group and a crosslinked structure, and is characterized by having a water absorption ratio of 4-300 times.

The application provides a ferrite ferromagnetic resonance line width measurement system and a test method based on accurate adjustment of a static magnetic field. The measurement system is based on a resonant cavity method for measurement, a high-Q cavity is used to improve the test sensitivity, and an n-layer Helmholtz coil device is innovatively designed. Through the combination of the n-layer Helmholtz coil device and an electromagnet, accurate adjustment of the static magnetic field loaded on the sample to be measured is realized, thereby overcoming the problem of small measurement range of a high-precision gauss meter, and improving the measurement precision.

The invention provides an ion detection module and a preparation method thereof.The single-channel ion detection module is prepared on the basis of the microfluidic technology, the ion detection module comprises a cavity and a bottom plate from top to bottom, the cavity and the bottom plate are connected in a sealed mode, and an annular counter electrode and a working electrode are arranged at the bottom of a test cavity; the surfaces of the electrodes are electroplated with gold layers, so that the test sensitivity and accuracy are improved; a reference cavity, a liquid complexing part cavity and a test cavity are vertically stacked around the same coaxial shaft, the reference cavity is filled with electrolyte, and the liquid complexing part cavity is electrically connected with test liquid, so that the process of feeding, storing and emptying a sample to be tested can be realized, and meanwhile, the test cavity, the liquid complexing part and the reference cavity are integrated in the vertical direction; the portable heavy metal detection is easy to realize.

The invention discloses a latex enhanced immunoturbidimetry detection reagent for glycosylated hemoglobin and a use method of the latex enhanced immunoturbidimetry detection reagent, and relates to the technical field of medical examination. The latex enhanced immunoturbidimetry detection reagent for glycosylated hemoglobin comprises a reagent R1 and a reagent R2, wherein the reagent R1 comprises first nano microspheres; and the reagent R2 comprises a second nano microsphere coated with a monoclonal antibody of HbA1c. According to the reagent R2, the nano microspheres are coated with the monoclonal antibody of HbA1c, the stability risk caused by the fact that balance needs to be established for immunoreaction of multiple antibodies and antigens is avoided through the monoclonal antibody, the problem that a glycosylated hemoglobin immunoturbidimetry detection reagent is insufficient in stability can be solved, the nano microspheres are arranged on the reagent R2, and therefore the stability of the glycosylated hemoglobin immunoturbidimetry detection reagent is improved, and the stability of the glycosylated hemoglobin immunoturbidimetry detection reagent is improved. By utilizing the characteristic that the volume of an antigen-antibody conjugate can be increased after the nano-microspheres are combined with the HbA1c monoclonal antibody, the turbidimetric degree of latex is effectively amplified, and the detection sensitivity can be improved.

The application discloses a novel target, and particularly relates to the technical field of targets, comprising a visible light target, a frame is fixedly arranged outside the visible light target, a moving unit is installed at the bottom of the frame, the position of the visible light target is finely adjusted by the moving unit, and an adjusting unit is additionally arranged at the bottom of the moving unit. The application realizes the movement of the visible light target test position by the moving unit, and the visible light target is driven to turn sideways in the movement through the slide guide, the tracking difficulty is improved, the test sensitivity is improved, the visible light target on the visible light target can be turned in different directions in the test with the assistance of the adjusting unit, the visible light target is more flexible and can freely move, a good adjustable range is obtained, and when the direction is adjusted, the moving unit and the visible light target are simultaneously driven to rotate by the linkage part, the adjustable range of the visible light target is further expanded, and the operation is more flexible.

The present application relates to the technical field of high temperature resistance test of foamed silicone rubber based on data recognition, and discloses a high temperature resistance test method of foamed silicone rubber based on data recognition. The steps include system parameter setting, test device building, short pulse excitation sampling, frequency domain response extraction, temperature step setting, main frequency statistical analysis, normalized frequency shift ratio and second-order difference acceleration calculation, failure determination and retest confirmation. By constructing a complete data-driven test process, the problems of low efficiency, dependence on subjective experience and difficulty in accurately determining the failure point of traditional thermal failure test are solved. The non-destructive spectral analysis method is used to improve the test sensitivity and repeatability, the data-based determination method enhances the objectivity and automation degree, the retest mechanism is introduced to ensure the reliability of the determination, and finally the structured test report is generated.

The invention relates to the technical field of material performance detection, and particularly discloses a device and a method for detecting the viscosity of a battery pole sealant. The device comprises a base, a standard test plate, a driving mechanism, a bonding test execution mechanism and a displacement sensing mechanism, the driving mechanism is arranged at the top of the base; the standard test board is transversely arranged at the top of the base, and one end is provided with a groove; the adhesion test executing mechanism comprises a sliding block and a temperature control pressure head hinged to the sliding block, the sliding block is driven by a driving mechanism, and a pressure sensor is integrated at the hinged position; the displacement sensing mechanism is arranged on the base; the method comprises the steps of sample loading and positioning, pressing temperature control, constant-speed pulling, synchronous acquisition of adhesive force and displacement, determination of separation time, recording of final displacement, and calculation of viscosity characterization value. According to the invention, a signal is amplified through a single-end bonded and lifted lever structure, and non-contact vision measurement and integrated temperature control are combined, so that the test sensitivity, precision and temperature adaptability are remarkably improved, and efficient, accurate and automatic characterization of the viscosity of the sizing material is realized.

The utility model provides a 50G error code appearance test board of high speed circuit design and PCB engineering application technical field, include: one layer auxiliary signal layer, one layer auxiliary ground layer, be located in the top of auxiliary signal layer, one layer power supply layer, be located in the top of auxiliary ground layer, be connected with auxiliary ground layer through high frequency decoupling capacitor, one layer high speed signal inner layer, be located in the top of power supply layer, one layer complete ground layer, be located in the top of high speed signal inner layer with auxiliary ground layer is connected, one layer high speed signal surface layer, be located in the top of complete ground layer with one error code appearance test chip, a plurality of differential microstrip line, a plurality of differential line, a plurality of high speed connector, one decoupling capacitor array, one terminal capacitance resistance, one ground via array, one shield GND copper skin and one power module are equipped. The utility model has the advantages of: greatly promoted the signal integrity of error code appearance, test sensitivity and measurement accuracy.

This invention discloses a signal analysis method for nondestructive testing of creep in metallic materials. The creep testing process includes: preparation of the test object and acquisition of nondestructive testing signals; projection of basis functions and calculation of parameters on the acquired test signals; comparison of the obtained parameter values ​​with a creep evaluation curve of the same material to assess the degree of creep. The basis functions and creep evaluation curve used in this process should be obtained under specified testing conditions, and the test signals of the tested object should also be obtained under these conditions. This invention patent prepares dedicated comparative test blocks for specific materials, including high-temperature aging test blocks and creep test blocks. It uses a certain amount of test data to extract test parameters and form a set of basis functions, ensuring the specificity of the test parameters to the material and creep structure, improving test sensitivity, reducing the dispersion of test results, and ensuring the repeatability of test results.

The invention provides an enzyme-free glucose biosensor, a preparation method thereof and application of the enzyme-free glucose biosensor in intelligent wearable electronic equipment. The non-enzyme glucose biosensor comprises a flexible material layer, a sensor layer and a perfluorosulfonic polymer layer which are sequentially stacked. The sensor layer comprises a metal sensing material substrate layer and a three-electrode modification layer which is arranged on the outer surface, far away from the perfluorosulfonic polymer layer, of the substrate layer; the three-electrode modification layer comprises a working electrode modification layer, a counter electrode modification layer and a reference electrode modification layer, and materials of the working electrode modification layer comprise copper oxide nanoparticles, calcium titanate nanoparticles and a perfluorosulfonic acid polymer. The glucose biosensor does not need the participation of glucose oxidase, is not easily influenced by external environmental factors, and can improve the stability of the device and the test sensitivity.

An apparatus and method for testing sensitivity consistency of an acoustic emission sensor are provided. The apparatus uses a cylindrical polymethyl methacrylate (PMMA) rod as a test bench. A clamping seat, a clamping block, and a mounting cylinder are mounted on one end of the test bench in cooperation. Under an action of a pressure spring, an end face of a tested sensor keeps pressure-stable coupling contact with an end face of the test bench. A bracket is mounted on another end face of the test bench, and keeps, together with a fixing seat and the clamping seat, the test bench horizontally placed on a desktop. By adjusting a width and an amplitude of a pulse excitation signal of a signal generator, and according to sensitivity distribution and aggregation between tested sensors, a consistency calculation method is used to screen out tested sensors with first, second, and third sensitivity consistency.

The utility model relates to the field of geological survey, concretely is a kind of press-in pressurized micro water test device. The device includes static pressure pipe, rigid water-permeable structure, press pipe sealing cover, water level meter, acquisition instrument and air pressure booster. Static pressure pipe bottom is connected with water-permeable structure and is pressed into target aquifer under the action of static pressure pipe equipment;Press pipe sealing cover is equipped with pressure gauge, pressure relief valve, sealing ring and pressurizing gas port;Water level meter extends into pipe and is connected with acquisition instrument, for collecting water level and pressure signal;Air pressure booster is connected with pressurizing gas port to stimulate water level. The device can complete micro water test without well completion, compact structure, easy operation, reduce construction cost and cycle, reduce disturbance to groundwater environment;Through air pressure instantaneous pressurization and pressure relief, improve test sensitivity and data accuracy;And can be selected static sounding probe collection specific resistance, realize the synchronous acquisition of hydrological parameter and formation information, have strong adaptability, test efficient and the like advantages.

The utility model provides an ion detection module, a single channel ion detection module is prepared based on the microfluidic technology, the ion detection module comprises a cavity and a bottom plate from top to bottom, the cavity and the bottom plate are connected in a sealed mode, an annular counter electrode and a working electrode are arranged at the bottom of a test cavity, and the working electrode is arranged at the bottom of the test cavity. The surfaces of the electrodes are electroplated with gold layers, so that the test sensitivity and accuracy are improved; a reference cavity, a liquid complexing part cavity and a test cavity are vertically stacked around the same coaxial shaft, the reference cavity is filled with electrolyte, and the liquid complexing part cavity is electrically connected with test liquid, so that the process of feeding, storing and emptying a sample to be tested can be realized, and meanwhile, the test cavity, the liquid complexing part and the reference cavity are integrated along the vertical direction; the portable heavy metal detection is easy to realize.

The invention provides a device and a method for synchronously testing sensitivity and orientation of reconnaissance equipment. The device comprises a rotary table, the reconnaissance equipment, a test antenna, a signal generator, a rotary table control box, a switch, a test computer and a reconnaissance equipment console, the test computer is provided with automatic test software, and the automatic test software reads the parameter configuration table, and is used for sending a control command, receiving, processing and analyzing data fed back by the turntable control box, the signal generator and the reconnaissance equipment console, and storing the data generated in the test process; the switch is connected with the test computer, the signal generator, the turntable control box and the reconnaissance equipment console through a TCP network; the signal generator is used for sending a specified radio frequency signal to the test antenna according to a command after receiving the command of the test computer, and feeding back a state to the test computer; after receiving a command of the test computer, the turntable control box controls the turntable to rotate to a specified direction and feeds back an angle to the test computer in real time; and after receiving the command of the test computer, the reconnaissance equipment console issues a specified working command to the reconnaissance equipment and transmits reconnaissance result information of the reconnaissance equipment to the test computer in real time. The direction and the sensitivity of the reconnaissance equipment are tested synchronously, and the testing efficiency is further improved.

The application discloses a kind of rock-soil body permeability test methods, specifically related to rock-soil body material permeability detection technical field, for solving the problem that the sensitivity of traditional method is insufficient when testing high-performance concrete and bedrock interface due to low permeability and micro-pore structure of material, and the applicability deviation problem of macroscopic model;It is by constructing sealed test environment under keeping in situ stress state, applying multistage incremental fluid pressure step to stimulate interface micro-pore flow response, monitoring transient seepage signal and analyzing the nonlinear growth law of the decay rate required by initial signal amplitude to reach stability, combined with waveform form and the matching identification of preset typical seepage mode and form deviation quantification, finally based on multi-parameter fusion generates the equivalent permeability of interface to realize accurate and reliable permeability evaluation.

The invention provides a method for testing leakage of an eye drop container, and the method comprises the following steps: providing the eye drop container which contains liquid; the eye drop container is placed in an environment with the temperature not higher than 0 DEG C for 3-10 h, and / or the eye drop container is placed in an environment with the temperature ranging from 40 DEG C to 60 DEG C for 3-10 h; and / or placing the eye drop container in an environment of 5 Hz to 25 Hz for 3 h to 10 h, and / or placing the eye drop container in an environment of 80 Hz to 100 Hz for 3 h to 10 h; the eye drop container is placed in a vacuum test box, the vacuum test box is vacuumized, so that the eye drop container generates internal and external pressure difference, and the leakage detection result of the eye drop container is obtained through the change of the internal and external pressure difference. According to the test method, the test difficulty of tiny leakage of the eye drop container can be reduced, the test sensitivity and accuracy are improved, and the quality of leakage test of the eye drop container is improved.

A blind cavity volume testing device and method for a phase change device can achieve blind cavity volume testing and measurement of a phase change energy storage device, and the blind cavity volume testing device comprises a vacuum dry pump, a testing valve set, an air storage tank, a sensor assembly, a testing pipeline, an air inlet pipeline, a cavity connector and an air supply connector. The gas storage tank with the standard volume can be selected according to the volume of a to-be-tested product to improve the measurement precision, the system error is eliminated by stably controlling the temperature of the to-be-tested product and the gas storage tank, and in the test process, the to-be-tested cavity is vacuumized through the vacuum pump, a low-vacuum initial state is established, the test sensitivity is improved, and the measurement error is reduced.

The present application relates to the technical field of acoustic testing, and especially relates to a kind of sensitivity testing method of optical fiber curved array hydrophone, after determining the coordinates of sound source, optical fiber curved array hydrophone and standard hydrophone on water test platform, sound source emits single-frequency pulse signal, after data acquisition system obtains the signal received by standard hydrophone and the signal received by optical fiber curved array hydrophone respectively, data analysis system generates analog sound source signal, and direct wave received by standard hydrophone and optical fiber curved array hydrophone is quickly found using correlation algorithm, and the sensitivity testing of optical fiber curved array hydrophone is realized, the present application solves the synchronization problem of different acquisition systems, is an effective supplement to the existing sensitivity testing method of optical fiber curved array hydrophone, and has wide application prospect.

The invention discloses a lithium ion battery storage performance and SEI film stability evaluation method, and relates to the technical field of lithium ion batteries. According to the evaluation method, on the basis of the instability of an SEI film in a low SOC region and the characteristic that the electrochemical reaction rate is accelerated by low current in a high-temperature environment, charging and discharging are repeatedly performed for 56 days by forming an oscillation interval between a first charge state and a second charge state by adopting second current; and observing the volume expansion trend of the battery cell to evaluate the storage performance of the lithium ion battery and the quality of the SEI film. Wherein the volume expansion rate can directly reflect the physical state of the SEI film and does not depend on indirect electrochemical parameters, so that the evaluation result is closer to the interface stability in an actual storage environment. The whole evaluation process is simple, the test sensitivity is high, and SEI film defects can be found early. In addition, the evaluation result can be output in only 56 days, the research and development period is remarkably shortened, the research and development efficiency is effectively improved, and the trial and error cost is reduced.

The disclosure relates to formulations and methods for the in vitro testing of ocular irritants. It was discovered that adding an antioxidant formulation to in vitro ocular irritation tests, including for example, a biochemical ocular irritation test, a reconstituted human corneal epithelium (RhCE) ocular irritation test and an excised eye depth of injury (DoI) test, substantially reduces the rate of false positives without diminishing test sensitivity, resulting in more accurately predicting ocular irritancy of test substances. More particularly, the disclosed method employs relatively high physiologic concentrations of one or more antioxidants that are normally present in tears. In a variation, much higher concentrations of one or more antioxidants may provide protection against in vivo exposure to ocular irritants.

According to the high-pressure-resistant sensor provided by the invention, the silicon island film structure is arranged at the cavity in the back surface of the pressure sensor, so that the pressure sensitive elements are all located at positions with relatively large stress, and the sensitivity of the sensor is improved; meanwhile, the hollow SIO film layer with the hexagonal micropore silicon net structure is manufactured on the silicon island film structure, when high-speed gas impacts the hollow SIO film layer, the impact force of the gas is buffered based on the micro-deformation of the hexagonal micropore silicon net structure, the gas cannot be influenced to penetrate through the hollow layer, the pressure sensing film layer of the pressure sensor is effectively protected, and the service life of the pressure sensor is prolonged. And the service life of the pressure sensor is prolonged. The pressure sensor is low in production cost, high in test sensitivity and long in service life.

The invention relates to the technical field of semiconductor test probes, discloses a high-sensitivity palladium-gold semiconductor test probe system, and aims to solve the problems of signal attenuation, test fluctuation, short service life and the like caused by high material resistivity, unstable contact resistance and easy oxidation of a traditional probe. The system comprises a palladium-gold alloy probe main body, a contact interface enhancement module integrated with an amorphous carbon protection layer and a noble metal transition layer, a signal transmission optimization module comprising an impedance matching and signal conditioning circuit, and a system control unit for monitoring contact resistance, pressure and temperature in real time, through material optimization, interface enhancement and closed-loop monitoring, low-resistance and high-stability contact is realized, the test sensitivity and precision are remarkably improved, and the service life of the probe is remarkably prolonged.

The application discloses a kind of for micro area in-situ analysis sample powder tabletting device, including base, fixed ring, splicing plate, pressing column, plug rod, plastic ring and polyethylene powder filling body;Splicing plate has multiple, multiple splicing plate can be slidably connected on the upper surface of base, the outer side wall of fixed ring and base can be slidably connected, each splicing plate has first limit surface;When tabletting, multiple splicing plate is slidably spliced on base and multiple first limit surface is combined to form groove, fixed ring is sleeved on the outer circumferential side of multiple splicing plate after splicing, plug rod is inserted in base through fixed ring, and pressing column is inserted in groove;Plastic ring is arranged in groove, and plastic ring is used to place rock powder, and polyethylene powder filling body is used to fill in groove to cover rock powder in plastic ring and the outside of plastic ring.The device does not need to add binder when tabletting, can press rock powder more compact, improve test sensitivity;Tabletting device can be disassembled, convenient sampling, improve efficiency.

The invention discloses a locomotive signal sensitivity rapid test method, and belongs to the field of train operation control equipment detection and maintenance. The problem that an existing method cannot improve the low test efficiency of an existing dichotomy on the premise that the test coverage rate and precision are guaranteed is solved. The method comprises the steps that a test system is initialized, a test sequence is loaded, and the test sequence comprises a plurality of test item points; executing the following operations on each test item point: judging whether the current test item point is the first item point in the sequence or not, or judging whether the carrier frequency of the current test item point is different from the carrier frequency of the previous test item point or not; if yes, executing a benchmark test process on the current test item point to determine a sensitivity value of the current test item point, and recording the sensitivity value and carrier frequency of the test item point; if not, executing a stepping voltage fine tuning test process on the current test item point to determine the sensitivity value of the test item point, and updating the recorded sensitivity value; and repeating the process until all the test item points are tested. The method is used in train operation control field.

The present application relates to the technical field of intelligent sensor testing, and in particular to a testing method, device and system for a sensing module. The present application first acquires testing data of the sensing module, further acquires a signal attenuation factor of each testing point, further acquires a signal attenuation coefficient of each interval distance according to the distribution of the signal attenuation factor of each interval distance, further acquires a testing sensitivity of each interval distance according to the difference between the signal attenuation coefficient and a standard signal attenuation coefficient and in combination with a detection success rate, and finally acquires a performance testing parameter of the sensing module. The present application quantitatively analyzes the signal attenuation and testing performance of the sensing module under different interval distances by constructing a dynamic testing scene, effectively solves the problem of long testing period and poor adaptability of the traditional static testing, improves the testing efficiency and result accuracy, and guarantees comprehensive and reliable performance evaluation of the sensing module.

The application discloses a kind of high sensitivity device and method for measuring high-temperature superconducting microwave surface resistance, belongs to electronics technical field, device includes test seat, calibration seat, calibration plate, support plate and sealed cavity, test seat includes test cavity, dielectric column, input coupling structure, output coupling structure and dielectric support device, dielectric column is different diameter coaxial cylindrical, is divided into two parts of support column and resonance column, support column is fixed with test cavity by dielectric support device, the end face of resonance column and the bottom end face of test cavity are in the same plane, the diameter of support column is less than resonance column, so that support column and test cavity jointly constitute a section relative to the cut-off waveguide of required resonance frequency, electromagnetic field is confined around dielectric column, and test sensitivity is improved.The application further proposes a double-sided cross test method for quickly testing the microwave surface resistance of the front and back surfaces of the high-temperature superconductor sample to be tested, which can significantly reduce system error and ensure the accuracy and reliability of the test.

According to the linear actuator with the nanoscale precision and the assembly method, the linear motor and piezoelectric actuator mixed direct drive technology is adopted, through double-closed-loop control, the nanoscale positioning precision and the high-voltage index requirement of the position are achieved, and the linear actuator has the advantages of being high in thrust, high in position precision, good in repeatability, high in response speed and the like. The method not only meets the requirements of high performance liquid chromatography on analysis speed, test sensitivity and test solvent amount, but also can provide technical support for development of an ultra-high performance liquid chromatograph.

To provide appropriate treatment for liver cancer patients, we offer indicators of sensitivity to multi-kinase inhibitors. [Solution] The present invention provides a testing method, testing apparatus, and testing program that use the fat content in liver cancer tissue as an indicator of sensitivity to multi-kinase inhibitors. This makes it possible to predict the therapeutic effect of multi-kinase inhibitors and provide appropriate treatment to individual liver cancer patients. The fat content can be calculated from images of liver cancer tissue or signals for image display. Images include MRI images, CT images, ultrasound images, stained images of tissue biopsies, etc. Signals for image display include MR signals, etc. Examples of multi-kinase inhibitors include lenvatinib and sorafenib.

The utility model discloses a triaxial piezoelectric acceleration sensor testing tool, belongs to the technical field of piezoelectric sensor testing, and solves the problem of low testing efficiency caused by the fact that three axes of a triaxial piezoelectric acceleration sensor need to be subjected to sensitivity testing respectively in the prior art. The tool comprises a tool main body fixed on a standard temperature vibration table, the tool main body comprises an inclined wall surface used for being connected with a triaxial piezoelectric acceleration sensor bolt, the inclined wall surface is a composite inclined surface, and the included angle between the inclined wall surface and a front projection surface and the included angle between the inclined wall surface and an overlook projection surface of the tool main body are both 30-60 degrees. According to the utility model, the triaxial piezoelectric acceleration sensor is fixed on the inclined wall surface of the tool main body, so that the standard temperature vibration table can test the sensitivity of the triaxial piezoelectric acceleration sensor in three axial directions at the same time. During a three-temperature test and a sensitivity temperature response test, three-wheel circulation is reduced to single-wheel circulation, so that the efficiency is remarkably improved.