117results about How to "Same sensitivity" patented technology

An electroacoustic transducer comprising a magnetic circuit of a magnetically conductive material with a pair of opposed surfaces defining a gap there between, the magnetic circuit comprising one magnet. The magnet can either be positioned in the center of the magnetically conductive material so as to form two gaps. In an alternative embodiment the magnet is attached to the magnetic conductive material forming only one gap. The transducer further comprises a diaphragm and a coil system having electrically conducting paths fastened to the diaphragm. The coil system has portions of its paths situated in the gap. The transducer may be supplied with an additional diaphragm and coil system positioned on the opposite side of the magnetic circuit. In a preferred embodiment the transducer is rectangular. The transducer is suited for integration into miniature components such as mobile communication equipment and hearing aids. Embodiments of the transducer are suited for side-firing or side-shooting applications such as in mobile phones.

An electroacoustic transducer includes a magnetic circuit of a magnetically conductive material with a pair of opposed surfaces defining a gap therebetween. The magnetic circuit includes a magnet inducing a magnetic field in the gap, the magnet having a surface constituting one of the opposed surfaces. The magnetic circuit further includes a diaphragm and a coil having electrically conducting paths secured to the diaphragm. The coil has portions of its paths situated in the gap.

The invention provides an all-fiber testing device for testing the polarization crosstalk of an optical device. The all-fiber testing device comprises a wide-spectrum light source (501), a polarizer (511), a to-be-tested polarizing device (522), an optical path correlator (530), a difference detector (550) and a photoelectric signal conversion and signal recording device (560), wherein the wide-spectrum light source (501) is connected with the to-be-tested optical fiber device (522) through the polarizer (511) and a first rotary connector (521) and is connected with the optical path correlator (530) with a polarization beam splitting Michelson structure through a second rotary connector (523); and the optical path correlator (530) is connected with the polarization difference detector (550) through a third rotary connector (541) and is connected with an interference signal detecting and processing device (560). The all-fiber testing device has the advantages of small size, high measurement accuracy, high temperature and vibration stability and the like, so that the all-fiber testing device is widely applied to high-accuracy measurement and analysis of the polarization performance of the optical device.

The invention provides a device and a method for improving polarization crosstalk measurement performance of an optical device. The device comprises a wide spectrum light source (301), a polarizer (311), a polarization device to be tested (632), an optical path correlator (640) and a polarization crosstalk detection and signal recording device (150), wherein the wide spectrum light source (301) is connected with the optical device to be tested (632) by the polarizer (311) and a first rotation connector (631) and then is connected with the optical path correlator (640) by a second rotation connector (633). By the device and the method, noise amplitude can be greatly suppressed, the sensitivity of polarization crosstalk measurement is improved, the dynamic range of polarization crosstalk measurement is expanded, and the device and the method are widely used for high-precision measurement and analysis on polarization performance of the optical device.

The invention relates to a method for calibrating sensitivity of a microphone, comprising the following steps: receiving a power supply voltage signal and a sound input signal; judging whether the power supply voltage signal meets a preset condition or not, if so, entering a calibrating mode to continue, and otherwise, stopping; restoring a clock signal from a sound signal; restoring a data signal from the power supply voltage signal; and regulating the amplifier gain and / or microphone bias voltage according to the clock signal and the data signal. A microphone calibrating circuit applying the method comprises a clock restoring module, a data signal restoring module, a gain regulating and controlling and register interface module and a storage, wherein the clock restoring module is used for restoring the clock signal from an output signal of a sound / electricity switching assembly; the data signal restoring module is used for restoring the data signal from the power supply voltage signal, the gain regulating and controlling and register interface module is used for writing amplifier gain regulating data into the storage according to the output of the clock restoring module and the data signal restoring module, and the storage is used for receiving the amplifier gain regulating data from the gain regulating and controlling and register interface module and is used as the grain arrangement when an amplifier normally operates.

The invention relates to a micro-structure fiber optic Fabry-Perot cavity quasi based quasi-distributed sensor, which comprises a broadband light source (1), a fiber optic circular (2), a plurality of sensor units (3), a sensor-based optical fiber (4), an optical spectrum analyzer (5) and a data processor (6), wherein each sensor unit (3) is a micro-structure fiber optic Fabry-Perot cavity, and the sensor units are connected in series and are integrated on the sensor-based optical fiber (4); and three ports of the fiber optic ring device (2) are respectively connected with the broadband light source (1), the sensor-based optical fiber (4) integrating all sensor units, and the optical spectrum analyzer (5), and the optical spectrum analyzer (5) is connected with the data processor (6). The micro-structure fiber optic Fabry-Perot cavity quasi based quasi-distributed sensor has the advantages of large sensing capacity, simple structure, low cost, wide application prospect and the like.

A air suction type laser image method for detecting fire accient by sensing smoke includes such stesp as pumping smoke or aerosol in smoke detecting chamber, taking the scatter image of smoke particles under the action of laser by CCD camera, A / D convertion, analyzing by image signal processor to obtain relative parameters, classifying and judging by neuro network, and driving the alarm device if it is the smoke of fire accident. Its advantages are high sensitivity, high speed, and reliability.

The invention provides a kit for measuring the thrombin generation in a sample of a patient's blood or plasma, or in a sample of clotting factors. The kit contains lyophilized tissue factor / phospholipid-complex and a lyophilized mixture containing a thrombin-substrate and CaCl2. The invention also provides processes for preparing the reagents for the kit. The kit can be used in a method for measuring the thrombin generation in a sample, wherein it is possible to detect changes in thrombin generation kinetics, for example after administration of inhibitor bypassing agents to a patient who has developed inhibitors to an exogenous clotting factor such as Factor VIII.

The invention relates to an ion chromatography-binode electrochemical hydride generation atomic fluorescence on-line combined system, which comprises a liquid chromatography pump, an admission valve, an ion chromatographic column, a three-way connecting device, a peristaltic pump, a binode electrochemical hydride generator, a four-way connecting device, a gas-liquid separator and an atomic fluorescence photometer. Element compounds of different forms in a sample are separated on the ion chromatographic column, the separated components are reduced to gaseous hydride on the binode electrochemical hydride generator, the gaseous hydride after undergoing gas liquid separation through the gas-liquid separator is led into the atomic fluorescence photometer by carrier gas for detection, and signals are recorded and processed by a self-developed work station. The ion chromatography-binode electrochemical hydride generation atomic fluorescence on-line combined system successfully realizes effectively converting the element compounds of different forms separated by the ion chromatographic column into hydride on line, and introduces an atomic fluorescence detection system on line, thereby establishing a simple, quick, sensitive, accurate, economical and reliable new technologic platform for element form analysis.

The present invention provides a device and method for sensing a touch panel, wherein any touch point of the touch panel is electrically connected with a touch capacitor. The sensing method comprises:integral amplifying the charge energy of the touch capacitor, obtaining a standard potential value in the total time cycle, wherein the total time cycle is the summation of a standard time cycle andan additional time cycle; and counting the additional time cycle in system frequency after the standard time cycle in the total time cycle, so as to determine the touch point.

A touch panel comprises a substrate, a touch sensing layer and a transparent cover plate. The touch sensing layer is disposed on the substrate. The transparent cover plate is of different thicknesses and is disposed on the touch sensing layer. The touch sensing layer comprises a plurality of touch units; each touch unit corresponds to single thickness of the transparent cover plate; according to the single thickness of the transparent cover plate, area of each touch unit and spacing between the touch unit and the adjacent one are set.

The invention discloses an interference type optical fiber distribution disturbance sensor and a disturbance location method thereof, which relate to the technical field of optical fiber distribution disturbance sensors. The sensor comprises a light source, two detectors, a first Mach-Zehnder interferometer and a second Mach-Zehnder interferometer. The first Mach-Zehnder interferometer comprises a first optical coupling device and a second optical coupling device, wherein the first coupling device divides light emitted by the light source into two beams and sends the beams into the second optical coupling device, the light beams are interfered in the second optical coupling device, and the interfered light is respectively transmitted to a first detector and the second Mach-Zehnder interferometer. The second Mach-Zehnder interferometer comprises a third optical coupling device and a fourth optical coupling device, wherein the third optical coupling device divides the interfered light into two beams and transmits the beams to the fourth coupling device, the light beams are interfered in the fourth optical coupling device, and the interfered light is transmitted to a second detector. The interference type optical fiber distribution disturbance sensor and the disturbance location method of the disturbance sensor are simple in hardware structure, low in cost, high in accuracy, easy to achieve and capable of being used for long-distance monitoring.

The invention relates to a single strand conformation polymorphism (SSCP) marker closely linked with a major wheat scab resistance quantitative trait locus (QTL). The SSCP marker is characterized in that: scab resistance candidate genes of a scab resistance QTL in a 3BS area of a wheat variety or strain resisting scab is PCR amplified by using a primer; after denaturalization, a PCR-amplified product has different single strand conformation; and the SSCP marker closely linked with the major wheat scab resistance QTL is established for detecting a genotype of the wheat variety or strain during breeding. The SSCP marker has the advantages of: overcoming the disadvantages that the wheat scab resistance screening can only be authenticated in a flowering period and is easily influenced by the environment in conventional breeding, predicting and screening wheat plants with the scab resistance by detecting a molecular marker at a seedling stage, eliminating disease plants, reducing waste of labor and materials and improving the breeding efficiency. Compared with an ABI DNA sequence analysis meter-based marker, the SSCP marker closely linked with the major wheat scab resistance QTL has the advantages of simple and convenient operation, low cost and same sensitivity.

The invention discloses an electromagnetic acoustic sensor with a consistent circumferential direction and single S0 mode Lamb wave and belongs to the field of nondestructive testing. The lower end of a protecting casing of the electromagnetic acoustic sensor is opened; an end part protecting casing is connected with the protecting casing at the opening of the protecting casing; an annular coil is arranged in the end part protecting casing and is provided with a gasket; a magnet is arranged right above the annular coil; a support sleeve is arranged on the magnet and is provided with an impedance matching circuit; another support sleeve is arranged between the upper top end of the protecting casing and the impedance matching circuit; the support sleeve is used for fixing the impedance matching circuit; and the impedance matching circuit is connected with the annular coil through a lead arranged in a square groove of the protecting casing and then is connected with a BNC (Bayonet Nut Connector) through two leads. The electromagnetic acoustic sensor has consistent exciting sensitivity and receiving sensitivity in a direction of 360 degrees, is a non-contact type sensor, can be used for exciting in a structure to generate the Lamb wave without a coupling agent and can be applied to unsmooth surfaces and bent and corrosive surfaces.

The invention discloses a composition for detecting a rheumatoid arthritis immune antibody by colloidal gold lateral chromatography. The composition comprises a cyclic citrullinated peptide (CCP) peptide composition, a macromoleclar polymer and a lateral chromatography detection medium, wherein the macromoleclar polymer is combined with the lateral chromatography detection medium in a covalent ornon-covalent form; the CCP peptide composition comprises CCP peptide I and CCP peptide II and is covalently or non-covalently combined with the macromoleclar polymer; and the molar ratio of the CCP peptide I to the CCP peptide composition is 0 to 1. The composition can realize rapid in-vitro detection of the rheumatoid arthritis immune antibody in 15 minutes, bring convenience to self-diagnosis of a patient and provide reference for immediately learning disease progression.

The invention discloses a PDCoV detection method based on a real-time fluorescence RT (reverse transcription) RAA (recombinase-aid amplification) technology. The method comprises experiment steps as follows: extracting RNA of PDCoV virus and designing Real-time RT-RAA primers and probes; establishing a Real-time RT-RAA reaction system, conducting a Real-time RT-RAA reaction on the RNA of the virusand obtaining real-time fluorescence detection results. The method has the advantages as follows: the PDCoV is detected simply and quickly at a low cost, the sensitivity of the Real-time RT-RAA detection method is consistent with that of a qPCR detection method, which is 102 copies / mu L, and the specificity is good.

The invention discloses a displacement sensor fault-tolerant control system and method for an active radial magnetic bearing. The displacement sensor fault-tolerant control system and method are matched with the active radial magnetic suspension bearing; the system comprises a displacement feedback part, a fault diagnosis circuit, a fault-tolerant control module and a feedback execution part, wherein the displacement feedback part is fixedly arranged on the periphery of a rotor of the active radial magnetic suspension bearing in an asymmetric mode; the output of the displacement feedback partis electrically connected with the input of the fault diagnosis circuit and the input of the fault-tolerant control module respectively; the output of the fault diagnosis circuit is electrically connected with the input of the fault-tolerant control module; the output of the fault-tolerant control module is electrically connected with the input of the feedback execution part; and the output of thefeedback execution part is electrically connected with an electromagnetic coil in the active radial magnetic suspension bearing. According to the displacement sensor fault-tolerant control system andmethod, the number of displacement sensors is greatly reduced, the fault types capable of being subjected to fault-tolerant control are increased, and it is ensured that the displacement feedback part can have the same sensitivity and measurement precision before and after the fault.

The invention provides a piezoelectric six-dimensional accelerator sensor based on a 9-SPS parallel mechanism, and relates to an accelerator sensor. The piezoelectric six-dimensional accelerator sensor comprises a shell (1), a cubic mass block (2), nine pieces of piezoceramics (3) and eighteen flexible spherical hinges (4); wherein the mass block is positioned in the center of the shell, and the upper surface, the front surface and the side surface of the mass block which are opposite to the shell are respectively provided with three pieces of piezoceramics to form three groups of piezoceramics together; the nine pieces of piezocermamics are cylindrical, and are connected with the mass block and the inner wall of the shell through the flexible spherical hinges (4); under the initial condition, the three groups of piezoceramics have pairwise orthogonal relation; and two pieces of piezoceramics on the upper surface are parallelly arranged left and right, two pieces of piezoceramics on the front surface are arranged up and down, two pieces of piezocermamics on the side surface are arranged front and back, and each group of piezoceramics is arranged symmetrically with the center of the mass block. The piezoelectric six-dimensional accelerator sensor has the advantages of simple structure, small volume, light weight, small measurement error, high precision, high sensitivity, high isotropy, wide signal band and the like.

The invention discloses a distributed hydrophone based on a super-high bending-resistant multi-core optical fiber flexible optical cable and relates to the fields of optical fiber sensing and hydrophones. The distributed hydrophone comprises a distributed optical fiber hydrophone and the super-high bending-resistant multi-core optical fiber flexible optical cable which are sequentially connected,wherein the optical cable comprises a central support layer, p multi-core optical fibers and an outer protection layer; each multi-core optical fiber comprises q fiber cores and is sleeved with a close wrap casing, and the p multi-core optical fibers spirally wind around the central support layer at equal intervals in the same direction; the distributed optical fiber hydrophone comprises a pulse modulation module, a demultiplexing module and a multiplexing module, and frequency division multiplexing is performed on each time division channel during space division multiplexing of signals in themultiple multi-core optical fibers. Space division multiplexing and frequency division multiplexing are combined, the frequency response range of the system for external acoustic waves is substantially increased to meet the demand of the hydrophone; the flexible optical cable substantially improves the sensitivity to external acoustic pressure; meanwhile, the distributed hydrophone has low cost and the same sensitivity in all positions and is applicable to long-distance monitoring and large-scale networking.

The invention provides a neutral buoyancy type MEMS vector hydrophone, wherein the detection ability of a NEMS vector hydrophone for weak acoustical signals in the water is significantly improved. The neutral buoyancy type MEMS vector hydrophone comprises a stainless steel circuit shell, a necked shell, a fixed disc, and an insulated annular tray with a boss. The boss is provided thereon with a circular PCB board and a detection chip. The detection chip comprises a four-beam micro-structure, a sensitive cylinder body and a buoyancy ball. The insulated annular tray is provided with a sealed screw hole and a signal screw hole. A sound transmission cap arranged on the insulated annular tray and internally filled with the silicon oil is fixedly connected with the insulated annular tray. The sound transmission cap is made of latex and super elastic materials. A support frame is arranged in the sound transmission cap. According to the technical scheme of the neutral buoyancy type MEMS vector hydrophone, the sensitivity of the NEMS vector hydrophone and the depths of directive pits are greatly increased on the premise that the frequency band of the hydrophone is not influenced at all. Therefore, a good prospect is provided for the application and development of hydrophones.

The invention provides a collimator, a detection device with the collimator, and scanning equipment. The collimator comprises a first collimating layer and a second collimating layer, wherein the first collimating layer and the second collimating layer are arranged in a stacking way; each of the first collimating layer and the second collimating layer is provided with a plurality of collimating holes; the plurality of collimating holes formed in the first collimating layer have different hole depths; the plurality of collimating holes formed in the second collimating layer also have different hole depths; each of the first collimating layer and the second collimating layer has a butt joint surface; the plurality of collimating holes or the extending directions of the plurality of collimating holes penetrate through the corresponding butt joint surface; and the two butt joint surfaces are in opposite arrangement and can be anastomotic with each other. The effective hole depths after the stacking of the plurality of collimating holes formed in the first collimating layer and the second collimating layer can be changed through the relative movement of the first collimating layer and the second collimating layer, so that different resolutionS and sensitivity can be obtained.

The invention relates to a non-contact type high-accuracy array electromagnetic thickness gauge. The non-contact type high-accuracy array electromagnetic thickness gauge comprises an electromagnetic thickness gauge electronic short joint, an electromagnetic thickness gauge signal receiving short joint and an electromagnetic thickness gauge magnetic field exciting short joint which are sequentially connected, wherein the electromagnetic thickness gauge signal receiving short joint is a cage-free type array probe structure. The non-contact type high-accuracy array electromagnetic thickness gauge has the advantages that the layout is reasonable, the structure is simple, the surface of a tested oil casing is completely covered, the measuring accuracy is high, and the requirement of engineering measuring of high-temperature and high-pressure oil and gas wells is met.

A multipurpose micro-mass sensor of a porous cantilever structure belongs to the technical field of multipurpose detection sensors. The micro-mass sensor is characterized in that the upper surface of a porous cantilever which is connected with a fixed block is connected with a piezoelectric film, and the areas of the extension part of the cantilever are a plurality of different detection areas with the same sensitivity. The mass of a detected object is accurately calculated according to the data output of the piezoelectric film. The induction of the porous cantilever can realize the following functions: (a) the plurality of detection areas are effectively isolated; (b) the sensitivities of all the positions in the detection areas are highly consistent with each other, so that the position sensitivity of a test result is reduced; and (c) specific examples show that compared with a conventional planar type sensor structure, the multipurpose micro-mass sensor has the sensitivity which can be increased by 187% at most. The multipurpose micro-mass sensor has the characteristics of simplicity in structure, wide measurement scope, good uniformity, high sensitivity and the like, and thus can be widely applied to gas / liquid concentration measurement and the measurement of cell growth and microorganism, such as bacteria or virus and the like.

A pipeline elbow detection method based on remote field eddy current and a detection device. The invention mainly solves the technical problem that the existing eddy current detection for pipeline elbow has blind zone or poor probe traversability. The technical scheme is as below: a remote field eddy current sensor including two identical exciting units and a receiving unit is employed, and the two exciting units are located on both sides of the receiving unit; the exciting units and receiving unit are arranged along the circumferential direction of the pipeline elbow cross section; the receiving unit area is located in the remote field area for measurement of indirect coupled magnetic field signal; when the remote field eddy current sensor applies harmonic excitation, double excitation is used to zoom in the remote field area to improve the signal amplitude; the sensor scans along the circumferential direction of the pipeline elbow to measure the phase difference between the signal received by the receiving unit and the excitation signal, so as to obtain change characteristics of the phase difference, namely the corrosion and crack information of the pipeline elbow. The method and device mainly use remote field eddy current principle and can be applied to pipeline elbow defect detection.

The invention belongs to the technical field of pesticide residue determination, relates to a vegetable and fruit pesticide residue pre-treatment method and in particular relates to an extraction and purification method for determining organophosphorus pesticide residues in fruits and vegetables. The extraction and purification method comprises the following steps of: sampling, adding an acetonitrile extracting solution, purifying by virtue of a MycoSep 226 AflaZon+ small column, and then determining. According to the extraction and purification method, dosage of an organic reagent is reduced, and nitrogen blowing or rotary steaming equipment is not required; a step of detecting organic phosphorus in a conventional method is not required, manpower is reduced, and detection efficiency is improved; purification degree of an organic phosphorus extracting solution is obviously improved, the obtained sample injection solution is clear and transparent, no obvious pollution on a detection system is produced after sample injection is carried out for multiple times, sensitivities of instrument and equipment are consistent, and a detection limit is constant; and peak height is not reduced and peak shape is constant after the sample injection is carried out for multiple times even if residues of organophosphorus pesticides, such as methamidophos, acephate, moncrotophos and omethoate with strong polarity, are determined. The extraction and purification method for detecting organophosphorus pesticide residues in fruits and vegetables has a good application prospect in the technical field of pesticide residue determination.

The present invention relates to an X-ray imaging apparatus including an X-ray source, a grating that divides diverging X-rays irradiated from the X-ray source, and a detector that detects X-rays which are divided by the grating and pass through a sample. The grating includes a plurality of transparent objects which pass the diverging X-rays and a plurality of opaque objects that shield the diverging X-rays. A focused position at which a plurality of extended lines intersect each other and the X-ray source are arranged in different position. The extended lines are formed by extending center lines which connect a center of the X-ray source side of each of the plurality of opaque objects facing the X-ray source with a center of the detector side of each of the plurality of opaque objects facing the detector.

A method and system for producing an ion beam from an ion guide. In the method, ions are introduced into the ion guide, a radio frequency trapping field is generated in the ion guide to confine ions in a direction transverse to a longitudinal axis of the ion guide, a DC potential is generated along the longitudinal axis to direct ion motion along the longitudinal axis, a strength of the radio frequency trapping field is reduced toward an ion guide exit of the ion guide, and the ions are transmitted from the ion guide exit to form the ion beam. In the system, an ion guide is configured to transmit ions in a longitudinal axis of the ion guide and configured to trap ions in a direction transverse to the longitudinal axis via a radio frequency trapping field. The ion guide includes a segmented set of electrodes spaced along the longitudinal axis and an ion guide exit at the last of the segmented set of electrodes. A radio frequency device is configured to supply the radio frequency trapping field such that a strength of the radio frequency trapping field is reduced toward the ion guide exit.