289 results about "Test sensitivity" patented technology

The invention features a method of determining whether one or more members of an analyte family are present in a sample. The method makes use of a test zone binder, e.g., a receptor that can bind one or a plurality of analytes within an analyte family, the analytes family defined by similar structural binding sites. Members of an analyte family can have different detection level requirements and, therefore, additional analyte binders can be employed to adjust test sensitivity for a subset of the analytes in the analyte family individually, so that each analyte can be detected only if it is present in the sample above a predetermined threshold.

The invention relates to impulse response analytical test apparatus and method for detecting deformation of transformer winding, belonging to the technical field of transformer winding detection. The apparatus mainly comprises an impulse generator, a broadband digital oscilloscope, a computer, a high-voltage probe, a head end signal impedance matching device, a tail end signal impedance matching device and a screened coaxial cable. In the method, site test and analysis are carried out by using the apparatus. The invention has the advantages of high test sensitivity, rapid detection, strong capacity of resisting disturbance and flexible analytical method, and can detect slight deformation of the transformer winding and judge early potential faults effectively with high judging accuracy. The invention can be widely applied to the detection of the deformation of the transformer winding and the state overhauling.

The invention provides a high-sensitivity and high-throughput kit for simultaneous quantitative detection of 30 amino acids and a preparation method thereof. According to the kit, after extraction treatment of amino acids in a complex sample by using organic solvents, precipitating by using methanol, adding stable isotope-labeled amino acid internal labels, performing derivatization treatment by using hydrochloric acid and n-butanol, drying and redissolving, carrying out reversed-phase chromatography gradient separation by adopting C18 bonded phase silica gel as a stationary phase and acetonitrile-water containing heptafluorobutyric acid and formic acid as a mobile phase, and carrying out quantitative detection by adopting a mass spectrometer. The kit of the invention has the advantages that detection sensitivity can reach 10ng/ml, and all methodological indexes can meet the requirements of quantitative detections of amino acids in clinical examinations, industrial productions and scientific researches.

A tactile sensing garment of intelligent robot consists of garment wearing on intelligent robot and tactile sensing unit set on said garment. It is featured as forming said tactile sensing unit by both top and bottom film electrode plates with each electrode contact being corresponded one by one as well as with one electrode contact being arranged in line array form and another one being arranged in column array mode, sticking a conductive rubber on each electrode contact of bottom film electrode plate and setting a backing strap with holes corresponding to said conductive rubber between two said film electrode plates.

The invention discloses a microwave source phase noise test method and device based on a microwave photon mixing technology. The device comprises a microwave source, a microwave power divider, a microwave phase shifter, a laser source, a first electro-optical modulator, an optical fiber, a second electro-optical modulator, an optical band pass filter, a photoelectric detector, an electric low pass filter and an FFT analyzer, wherein the laser source, the first electro-optical modulator, the optical fiber, the second electro-optical modulator, the optical band pass filter, the photoelectric detector, the electric low pass filter and the FFT analyzer are sequentially connected in the optical path direction. According to the method, a microwave signal to be tested generated by the microwave source is divided into two paths through the microwave power divider, one path of the signal is modulated through the first electro-optical modulator to generate an initial modulated optical signal, the other path of the signal enters the second electro-optical modulator after passing through the microwave phase shifter and conducts modulation on the initial modulated optical signal generated after the optical fiber is delayed, and the finally obtained modulated optical signal passes through the optical band pass filter, the photoelectric detector and the electric low pass filter sequentially; the signals output by the electric low pass filter are collected by the FFT analyzer, and the phase noise of the microwave signal to be tested is obtained through computing. The method and device have the advantages of being wide in operation bandwidth, high in test sensitivity, free of changing along with the frequency and the like.

The invention discloses a passive direction-finder antenna array of a phase interferometer and the phase interferometer. The passive direction-finder antenna array comprises three layers from inside to outside. The first layer is a circular antenna array composed of a plurality of dual-polarization omnidirectional antenna array elements which are arranged on a circumference, each dual-polarization omnidirectional antenna array element comprises a horizontal polarization oscillator and a perpendicular polarization oscillator and is connected with one-out-multiple antenna switch through a polarization choice output matching board, and the horizontal polarization oscillators and the perpendicular polarization oscillators on the circumference are adjacently arranged; the second layer is a horizontal polarization antenna array which comprises a horizontal polarization annular oscillator; the third layer is a perpendicular polarization antenna array which comprises a perpendicular polarization biconical antenna oscillator and two cones in the perpendicular polarization biconical antenna oscillator are respectively connected with a matching circuit; the horizontal polarization antenna array of the second layer and the perpendicular polarization antenna array of the third layer are connected with the input ends of the same one-out-two antenna switch. The passive direction-finder antenna array has the advantages of being simple in structure, low in production cost, high in testing sensitivity and high in accuracy.

The invention discloses a micro-cantilever gas sensor comprising sensing units and is characterized in that each group of sensing units comprises two micro-cantilevers, wherein the two micro-cantilevers can be a measuring cantilever and a reference cantilever, and a Wheaston bridge is formed by the measuring cantilever and the reference cantilever and two matching resistors; the measuring cantilever and the reference cantilever are connected to adjacent bridge arms of the Wheastone bridge, and the surface of the measuring cantilever is provided with a pressure-sensitive layer and an air-sensitive layer; a layer of polyelectrolyte polydiene propyl ammonium chloride film is deposited on the surface of the reference cantilever; and a photosensitive polyimide is used as a sacrifice layer material to connect an upper electrode with a lower electrode of each sensing unit through an inverse-splay window. The sensor has the advantages of simple structure, higher test sensitivity, and has wide application prospect in fields, such as environment monitoring, food safety, military and the like.

The invention relates to testing method, testing tool and testing system of terminal receiver sensitivity, the core is: the testing tool controls the signal source to generate wireless signal and transmits known data to the equipment which is to be tested, the equipment demodulates and FEC decodes the data, then it is transmitted to the spectrum analyzer; the spectrum analyzer demodulates and decodes the wireless signal, and provides data to testing tool; the testing tool calculates error code based on the data of signal source and the received data. The invention does not depend on TEST BS equipment, and the invention can make test data accurate, the efficiency is high, besides the invention can be used in development, testing, manufacture and operating attestation testing of SS, it provides a scheme of testing sensitivity of SS receiver for device supplier and operator.

The invention provides an automatic test system and test method for testing surface capillary water absorption of concrete, relates to a test system and a test method thereof, and aims to solve the problems that the existing test system is impracticable to ensure that the effective depth of a specimen immersed in water is always a small constant value, the water absorption mass of the specimen can not be automatically and continuously measured in real time, accidental errors caused by manual operation and the like exist, the test sensitivity is low and the precision is low. The system comprises a constant-pressure water supply unit, an electronic balance and a specimen water absorption unit. The test method comprises the following steps: 1, emptying liquid in a balanced air inlet pipe; 2, regulating height and water level of the specimen water absorption unit; and 3, acquiring mass data by using a computer. According to the invention, the effective depth of the specimen immersed in water can be ensured to be always a small constant value, real-time automatic continuous measurement can be realized, the accidental errors can be reduced, the test sensitivity is high, and the precision is high. The system and method are used in the fields of experimental study on pore structures and surface capillary water absorption of a concrete material, and physical engineering durability detection.

The invention discloses an automatic analyzer for an anionic surfactant in water, which comprises an automatic sampling device, a peristaltic pump, a detector and a sample processing assembly, wherein the sample processing assembly comprises a sample filling valve, knotted reactors, a three-way valve, a four-way valve, chemically inert microporous hydrophobic film on-line extraction modules, and a capillary connecting pipe; and one port of the sample filling valve is connected with a flask for carrying current, and the other port is orderly connected with a first knotted reactor, a first chemically inert microporous hydrophobic film on-line extraction module, a second knotted reactor, a second chemically inert microporous hydrophobic film on-line extraction module, the four-way valve, a flow cell, the detector and a computer processing system. The automatic analyzer can continuously and automatically test samples, has high test speed, the frequency of detecting samples of 18 samples/hour, high test sensitivity and good test accuracy, and uses the on-line double extraction modes to have strong interference resistance; and most inorganic ions such as SCN-, CN-, NO3-, Cl-, F-, Br- and the like are not interfered when the concentration is 1,000mg/L.

The invention discloses a method for monitoring an aging process of a working state of an optical module in real time, and aims to provide a test device that is easy to operate, high in test efficiency, not easy to make mistakes, and can monitor the working state of the optical module in real time. The method is implemented by the following technical scheme: an interface circuit is connected in parallel with two microprocessors; the microprocessors communicate with a designated optical module communication bus through an analog switching circuit to collect data of an optical module under test;the interface circuit converts I2C communication into USB communication of the microprocessors, and transmits monitored aging information of the optical module to built-in automatic monitoring software of the microprocessors; and the automatic monitoring software performs real-time on-line monitoring and diagnosis on the working states of the optical modules on all burn-in boards, tests working performance parameters of the optical module under test all the time, automatically acquires eye diagram and test sensitivity information, masters the aging degree of each optical module, carries out fault diagnosis services, inquires and traces obtained optical module parameter information, and finds out positions of faults in a link.

The invention discloses method for testing sensitivity of a wireless communication product in an ISM (Industrial, Scientific and Medical) frequency band, relating to methods for testing the sensitivity of the wireless communication products and solving the problem of low accuracy in a sensitivity test because the traditional method cannot simulate an actual condition. In a system I, signals emitted by an emitter are input into a receiver through an adjustable attenuator and a fixed attenuator. In a method I, the error rate from the adjustable attenuator to the receiver is adjusted to determine whether a preset error range is reached, and the sensitivity of the receiver is calculated. In a system II; the signals emitted by the emitter are input into the receiver after being processed by the adjustable attenuator I, a power distributor, a combiner and N adjustable attenuators II. In a method II, the reference attenuation values of the adjustable attenuators are respectively adjusted, the length of a transmission line is adjusted to make the receiver in a critical state, and a power meter is adopted to test the received signal power of the receiver and calculate the sensitivity of the receiver. The systems and methods disclosed by the invention are suitable for testing the sensitivity of the wireless communication products in the ISM frequency band.

Cervical Acid Phosphatase-Papanicolaou Test Kit (CPK) is an assembly of reagents, controls and instructions for visualization of cervical acid phosphatase on smears or monolayers of cervical specimens, and for performing the CAP-PAP Test (CPT). CPT is a single-slide, double-staining method for demonstration of cervical acid phosphatase activity inside abnormal cervical cells on Papanicolaou stained smears, and a set of criteria for using this test for cervical cancer screening. In previous clinical trials this method was found to enable Pap test screeners to improve test sensitivity (detection of abnormal cells) for more than 10% (from 0.8 to 0.9), and to reduce false negative readings (missing abnormal cells) for more than 50% (from 0.1 to 0.02). Due to better accuracy and the low cost, when approved, CPT may begin to replace current technologies for cervical cancer screening. CPK is designed to meet requirements for testing large series of specimens on regular basis-the usual practice in cytopathology laboratories performing the Pap test. CPK brings consistency for staining and interpretation, makes internal and external controls easier, and improves the test accuracy for lower cost, while increases laboratory productivity for less liability.

The invention discloses a swarm intelligence optimization fault diagnosis system based on hybrid optimized parameters. The system is used for performing fault diagnosis on a Tennessee Eastman processand comprises a data preprocessing module, a principal component analysis module, a relevance vector machine module and a swarm intelligence algorithm module. Fault diagnosis prediction of important parameter indexes of the Tennessee Eastman chemical process is performed, the defect that the fault diagnosis effect is affected due to the fact that the instrument test sensitivity of existing chemical fault diagnosis technologies is poor and optimal system parameters are difficult to find is overcome, the swarm intelligence algorithm module is introduced to optimize relevance vector machine parameters, so that the swarm intelligence optimization fault diagnosis system based on hybrid optimized parameters is obtained, and the effects that the test sensitivity of the fault diagnosis system is good and globally optimal solutions are easy to find in the Tennessee Eastman process are realized.

The invention provides a non-contact life sign monitoring signal processing system, comprising an I/Q channel signal processing module, a respiration frequency estimation module, a modulation component removing module and a heartbeat frequency estimation module, wherein the I/Q channel signal processing module is used for combining I/Q channel signals I(t) and Q(t) into a complex signal S(t); the respiration frequency estimation module is used for defining a frequency rotation operator according to the baseband signal mathematic model characteristic, multiplying S(t) by, performing Fourier transformation, performing optimizing estimation on a parameter P by the spectrum concentrated index, and estimating firstly to obtain respiration frequency fr; the modulation component removing module is used for multiplying S(t) by the frequency rotation operator estimated in the step 2 and removing the modulation component caused by respiration in S(t); and the heartbeat frequency estimation module is used for estimating the heartbeat frequency fh. According to the non-contact life sign monitoring signal processing system provided by the invention, the matched frequency rotation operators are constructed based on a radar baseband signal model to perform parameterization optimizing estimation, and high-precision fr and fh estimation values can be obtained by short sampling length data, so the test sensitivity and the noise resistance are high.

The invention provides a method for testing sensitivity of a digital television receiving terminal and a system thereof which is suitable for the image transmitting field. The method includes steps as follows: connecting a computer with a digital television testing transmitter and a digital television receiving terminal, transmitting a testing dictate carrying a testing parameter to the digital television testing transmitter by the computer, the digital television testing transmitter automatic adjusting the signal intension of a RF signal to the digital television receiving terminal according with the testing parameter, the computer automatic recording present signal intension when mistake code rate feedback by the digital television receiving terminal reaching to the mistake code base, accordingly, the testing person needs not adjust various parameter of the testing instrument by hand. The testing person is more convenient for testing sensitivity by using the method and the system provided by the invention which increases testing efficiency.

The invention discloses an optical fiber current sensing method used for monitoring subway stray current and a sensing device thereof. Light-transmitting parts and sensing parts in the optical fiber current sensing device adopted by the invention are connected by all-fiber. The measurement results of the existing subway stray current monitoring method which is based on polarization potential monitoring are affected by factors and evaluated in a non-directviewing way. The invention is based on faraday effect, utilizes polarization property of optical fiber and indirectly measures current by measuring faraday rotation angle in the optical fiber, thereby overcoming the disadvantages of the traditional stray current monitoring method. The method has the prominent advantages that system test sensitivity can be adjusted according to specific conditions so as to be suitable for measuring current with different ranges. In the invention, the all-fiber is used for transmitting, thereby ensuring simple light path and good insulating property; closed circuit integral of a magnetic filed generated by current is detected by the sensing device, so that the measurement results are difficult to be affected by a stray field; the measurement frequency band is wide, and the dynamic range is wide, therefore, the invention has good project application prospect.

The invention aims at providing high-sensitivity electrode type uric acid test paper. Under the condition that the content of uric acid in blood is low, the test sensitivity of the uric acid can be improved, and the uric acid can be accurately, quickly and simply detected. The high-sensitivity electrode type uric acid test paper comprises an insulating substrate, wherein three strip-shaped conductive electrodes are arranged on the insulating substrate; an insulated isolation layer is arranged at the upper part of each conductive electrode; an electrode conduction part at the front end of each conductive electrode is exposed; a reaction window is formed in each insulated isolation layer; an enzyme reaction film is adhered to the interior of each reaction window and contains a biological reagent which reacts with a detected substance and comprises enzyme reacting with the detected substance and an electron transfer carrier; an adhesion baffle is arranged on each insulated isolation layer; a rectangular siphon sample guide groove is formed in the position, corresponding to each reaction window on the corresponding insulated isolation layer, on the corresponding baffle; an air guide hole is formed in one end, close to each electrode conduction part, of the corresponding siphon sample guide groove and penetrates through the narrow end of the corresponding adhesion baffle; a sampling opening is formed in one end, far away from each electrode conduction part, of the corresponding siphon sample guide groove.

The invention discloses a high-sensitivity gas sensor based on a microchannel plate three-dimensional structure and a production method of the high-sensitivity gas sensor. The high-sensitivity gas sensor consists of a detection module and a heating module; the detection module is bonded with the heating module through an electrically-conductive sizing agent; the detection module and the heating module are respectively provided with two lead leading-out electrodes, i.e. a detection electrode and a heating electrode, the detection module and the heating module are packaged inside a packaging tube shell, and the packaging tube shell is provided with at least four electrodes; the detection module is sequentially formed by an upper electrode, a microchannel plate and a lower electrode from top to bottom; the heating module is sequentially formed by a heat insulation substrate, a heating resistance coil and an insulation film from bottom to top. The high-sensitivity gas sensor has the beneficial effects that the effective specific surface area of a gas-sensitivity film can be improved, so that the sensitivity of the gas sensor can be improved; the porous structure of the microchannel plate favors the successful passing of detected gas, so that the test sensitivity and reaction speed of a device can be improved.

The invention provides a piezoelectric film bulk acoustic wave sensor with polygonal electrodes, comprising a substrate, a piezoelectric film, an upper metal electrode and a lower metal electrode which are distributed on the two surfaces of the piezoelectric film, an electrode lead and a sensitive film covering the surface of the upper electrode, wherein one or both of the upper electrode and the lower electrode on the piezoelectric film is/are polygon(s); and for the polygon, any two edges are not parallel, the inner angles are all obtuse angles, and the number of the edges is less than 10, wherein the effect of a regular pentagon is best. The piezoelectric film bulk acoustic wave sensor reduces microwave signals from generating stronger reflection at parallel edges and the acute angles or right angles, enhances vibrating efficiency of acoustic wave, improves quality factors and testing sensitivity of devices, and increases the load testing range of the sensor. Simultaneously, the sensor also has the advantages of simple structure, convenient manufacture, high reliability and capability of adopting micromachining (MEMS) process flow for manufacturing and the like, and also can be used for other acoustic wave resonators and sensors.

The invention relates to a method for determining the content of nitrogen in nitrate and/or nitrite of a water sample and a device thereof. According to the method, the water sample, deionized water and a buffer solution of which the pH value is 5.2-8.6 are mixed to prepare a mixed liquor, then the mixed liquor is heated at the temperature of 50-80 DEG C and then is irradiated under ultraviolet light, or the obtained mixed liquor is directly mixed with a sulfanilamide color-developing agent, and the content of the nitrogen in the nitrate and/or the nitrite of the water sample is detected by an ultraviolet and visible spectrophotometer. The device disclosed by the invention comprises a sample introduction device, a sampling ring, a multi-ported valve, a peristaltic pump, a heating module, an ultraviolet digestion module, a knitting reactor, a flow cell, the ultraviolet and visible spectrophotometer, a deionized water container, a buffer solution container, a color-developing agent container, a first three-way valve, a second three-way valve, a first back pressure regulator, a second back pressure regulator, a waste liquor groove and a computer. The method is nontoxic, and has no pollution on the environment; and the device is high in test sensitivity and good in accuracy.

An electrically conductive clothing with tactile sense for intelligent robot is composed of the main clothing body and the covering attached onto said main clothing body and with tactile sense. Said covering consists of an electrically conductive fabric layer with electrically conductive wires on it, an electrically conductive fabric layer with the contacts of switches in a contact region, an insulating elastic netted liner and a grounded fabric layer made of an electrically conductive film.

The invention discloses a potentiometric sensing electrode for testing an adrenergic agonist and a sensor thereof. The sensing electrode comprises an electrode cable, a platinum electrode, an insulating sleeve, an electrode cap, a molecular imprinting membrane and a potential electrode solution; the platinum electrode is arranged in the insulating sleeve, and the electrode cable is drawn out from the upper end portion of the insulating sleeve; an end cap of the electrode cap is in an annular hollow structure, and an inner circle area on the inner side of the end cap is covered with the molecular imprinting membrane provided with a molecular imprinting pore structure; the outer side on the lower end portion of the insulating sleeve is closely sleeved with the electrode cap to fix the molecular imprinting membrane between the electrode cap and the insulating sleeve; and the potential electrode solution immersing at least the lower end of the platinum electrode is poured in the insulating sleeve. According to the potentiometric sensing electrode for detecting the adrenergic agonist and the sensor thereof, the potentiometric sensing electrode uses the molecular imprinting membrane with high peculiarity as a receptor of an electrochemical sensor and has the advantages that the test sensitivity is high, the operation is simple, the sensing electrode is convenient to carry, and the like, and field tests of adrenergic agonists are achieved.

The invention belongs to the technical field of aviation tests, and especially relates to a method for testing the reception sensitivity of an airplane radio compass receiver. The method utilizes an airplane radio compass ground simulation and test system, and the system comprises an integrated tester, and a power supply module, an excitation module, a display test module and a tested object which are respectively connected with the integrated tester. The method can realize the tests of the sensitivity of the radio compass receiver by a special apparatus on a general instrument, and allows a novel compass control box adopted by a certain type airplane to be stimulated without influencing the tests of the relevant performances of the compass receiver under a matching control box lack condition. The method shields tedious setting and operating steps for a common test personnel, and a fixed test flow guarantees the repeatability of the tests. The method has the advantages of realization of the automatic completion of the test of all parameters through software, high test precision, good consistency of the test conditions, and rapid test speed.