33results about How to "Improve sensitivity and precision" patented technology

The invention discloses a tactile sensor based on friction power generators and a robot tactile perception system. The tactile sensor comprises at least one friction power generator. Each friction power generator comprises a first electrode layer, a first high-molecular polymer insulating layer and a second electrode layer which are laminated in turn. The two opposite surfaces of each friction power generator form friction interfaces. When external force acts on the friction power generators, the friction interfaces perform mutual friction, and the friction power generators output pressure electric signals corresponding to external force. The first electrode layer and the second electrode layer form the output ends of the friction power generators. According to the tactile sensor based on the friction power generators and the robot tactile perception system, the structure is simple, and sensitivity and accuracy are high.

A capacitive touch panel is made of transparent panel assembled by a substrate layer, a sensing layer, an insulated layer, and a surface layer. A plurality of transparent X and Y axis traces are arranged on the same plane of the sensing layer and the X and Y axis traces intersect each other as a matrix. Induction-spots formed on each X axis trace are connected one by one, while the induction-spots of each Y axis trace are formed separately with gaps. Through holes in pair are formed on the insulated layer respectively to all the abreast induction-spots of each Y axis trace. A conductive wire is arranged above and across the pair of through holes. Both ends of the conductive wire exposed to the through holes respectively are formed as electrical joints. While the insulated layer is arranged above the sensing layer.

The embodiment of the invention discloses a vehicle braking system, method and device and a fatigue driving model training method and device. The braking system of the vehicle comprises an automatic emergency braking device and a driver monitoring device, wherein when the automatic emergency braking device detects a risk area, a detection result that the risk area exists is sent to the driver monitoring device; when the driver monitoring device receives the detection result sent by the automatic emergency braking device, based on a preset fatigue driving detection model, an image containing the face area of the driver is recognized to determine the mental state of the driver, the reaction state of the driver is judged according to the mental state, and the judgment result is sent to the automatic emergency braking device; and the automatic emergency braking device is configured to receive the judgment result and adjust the braking strategy according to the judgment result. By adoptingthe above technical scheme, the triggering accuracy and safety of the automatic emergency braking device are improved.

The invention discloses a target detection method and device. The target detection method comprises the following steps that an original video of a radar device is obtained; the original video is preprocessed on the basis of an automatic threshold algorithm to obtain a first video; plotting and tracking are conducted on the first video to obtain a small target, wherein the radar cross section of the small target is not smaller than 0.1 m<2>, and the height of the small target is not smaller than 1 m. Through the target detection method and device, the problems that small target detection equipment is poor in capacity and low in detection accuracy in the correlative technology are solved, small targets on the sea surface can be found accurately in time, the accident occurrence rate is reduced, and sensitivity and accuracy of a detection system are improved.

A glass-wiping device comprises a machine body (1) and a control unit. The machine body (1) is provided with an edge detection unit (100), the edge detection unit (100) comprises a sensor switch (101, 101′) and an action element (102). The action element (102) is provided at a lower end thereof with a contact leg (1021, 1021′) that presses against the surface of a glass (200). When the contact leg (1021, 1021′) leaves the surface of the glass (200), the action element (102) correspondingly generates a displacement and triggers the sensor switch (101, 101′); the sensor switch (101, 101′) transmits a switch signal to the control unit; the control unit controls, on the basis of the switch signal, the glass-wiping device to cease running or to change the running direction. The glass-wiping device has a simple structure, reduced costs, high sensitivity and great controllability, and effectively implements the detection of the edge of a plate glass.

The invention belongs to the field of environment detection and particularly relates to a method for detecting available lead in soil. The method for detecting the available lead in the soil comprises the following steps of carrying out alkaline hydrolysis treatment on a sample, then carrying out leaching extraction in an acid condition; and finally measuring by adopting a flame atomic absorption spectrometry. The extract solution comprises chitosan oligosaccharide, potassium chloride, citric acid and water. The method for detecting the available lead in soil has the advantages of high precision, good accuracy and high repeatability, has the advantages of being simple in operation and convenient to implement and is completely suitable for detection of the available lead in soil.

A sample assembly includes a stack of a sample and a hydrophobic elastic layer located on the back side surface thereof or a filter layer. The sample may include a biological material or a chemical, and can include an absorptive material. The filter layer includes an absorptive material in which a sample material is embedded. A sealing surface sampling probe including a knife edge lands on an area of interest in the sample or the filter layer. The hydrophobic elastic layer or the substrate in conjunction with the knife edge provides a complete sealing of a confined portion of the sample or the filter layer to prevent inclusion of any other material from outside the confined volume and to enhance the precision and sensitivity of the analysis.

The invention relates to ribonucleic acids and oligonucleotide probes useful for detection and analysis of microRNA precursors and their targets. The invention furthermore relates to oligonucleotide probes for detection and analysis of other non-coding RNAs, mRNAs, mRNA splice variants, allelic variants of single transcripts, mutations, deletions, or duplications of particular exons in transcripts, e.g., alterations associated with human disease, such as cancer.

The invention discloses a detection device for an angular position of a rotating shaft of a speed reducer of an electric lock. The rotating shaft of the speed reducer of the electric lock is provided with a Hall switch assembly in a matching manner, a plurality of Hall switches are uniformly distributed around the rotating shaft in the Hall switch assembly, a permanent magnet and a Hall switch sensor are arranged on the rotating shaft, and which Hall switch is closer to the permanent magnet is judged by comparing output currents of the Hall switches, so as to detect a rotation angle of the rotating shaft. According to the detection device disclosed by the invention, the angle of the rotating shaft is detected by the Hall switch assembly, thereby avoiding idling of the rotating shaft, improving the accuracy and the sensitivity of manipulation of the electric lock, shortening the unlocking time and reducing the power consumption.

The invention relates to a method for detecting CYP2C9 enzyme activity in earthworms by adopting a high-performance liquid chromatography-tandem mass spectrometry and belongs to the technical field of enzyme activity detection. The method specifically comprises the following steps: (1) preparing earthworm microsome protein suspension; (2) adding the earthworm microsome protein suspension prepared in the step (1) into an incubation system containing a probe substrate; raising the temperature to start an enzymatic reaction; after the enzymatic reaction is stopped, detecting a metabolic product, which is generated after the enzymatic reaction is stopped, by adopting the high-performance liquid chromatography-tandem mass spectrometry; calculating the CYP2C9 enzyme activity. The detection method is high in accuracy, precision and sensitivity and high in stability, and can be used for analyzing and detecting the CYP2C9 enzyme activity in the earthworms under different pollution environments, so that a detection method for probing the possibility of taking CYP2C9 as a biological marker to indicate soil pollution is provided.

Provided are an element applicable to a high-precision, high-sensitivity pressure detecting sensor and switch, a manufacturing method for the element; and a sensor, an electronic circuit, and an input device that include the element. The electret element of the present invention has a semiconductor sandwiched between a pair of electrodes, and an electret film disposed at a location opposite to the semiconductor via a gap. The electret element of the present invention may be structured so that the semiconductor contacts with the electret film, or so as to have micro-sized gaps therebetween. The electret film is semi-permanently kept in a positively or negatively charged state. By having a structure in which the electret film can contact with or approach the semiconductor, an amount of electric currents flowing between the pair of electrodes can be controlled.

The invention discloses a slurry density sensor, which comprises a standard measurement bucket (1), a sensor A (2), a sensor B (3) and a foot stand (4). The lower end of the standard measurement bucket (1) is provided with a cement slurry inlet (5), and the upper end of the standard measurement bucket (1) is provided with a slurry outlet (6). A screw mounting opening A (7) and a screw mounting opening B (8) are formed at the interval of h on the sidewall of the standard measurement bucket (1). Density is calculated according to a formula. The slurry density sensor changes the selection of a reference height in the prior art and uses a fixed height so as to greatly improve the sensitivity and accuracy of the density sensor and more accurately and timely reflect a density parameter of slurry, simultaneously reduces the diameter of the standard measurement bucket so as to increase the flow velocity of the slurry, prolong the service life of the sensor and further reduce sensor replacement and disassembly times and the production cost, and has a wide application range.

The invention discloses a capacitance type sensor and a preparation method thereof. A differential positive-negative electrode pair is arranged; the differential positive-negative electrode pair comprises a first positive-negative electrode pair and a second positive-negative electrode pair; a functional material layer is arranged on the first positive-negative electrode pair to realize differential measurement; and thus the accuracy and sensitivity of the capacitance type sensor are improved.

The invention relates to the technical field of non-contact micro-area temperature detection measurement and discloses a nano probe for biological micro-area and photothermal therapy and a synthesis method and a detection method thereof. Upconversion nanoparticles adopt optical rate detection temperature and are excited by 808 nm laser, heat effect interference of water absorption is avoided, 808nm two-photon near-infrared direct excitation and two-excitation process based on dye energy resonance transfer excitation effectively improve the luminescent conversion efficiency and the temperaturemeasurement sensitivity of the nanoparticles. By applying the nano probe for biological micro-area and photothermal therapy and the synthesis method and the detection method, the non-contact measurement of the temperature of a biological cell micro-area or regional temperature can be achieved, the redundant energy during the strong laser excitation can be converted into heat by adjusting the excitation light power and utilizing the strong absorption of a dye, and the accurate thermal shock and simultaneous temperature monitoring for a tumor photothermal therapy can be achieved.

The invention belongs to the field of mechanical equipment, and relates to a machine vision shape sorting device. The machine vision shape sorting device comprises a conveying belt parallel to the ground and a Keyence camera supporting frame which is located on one side of the conveying belt and perpendicularly connected with the ground. An aperture is connected to the intelligent camera supporting frame and used for enabling an intelligent camera to conveniently achieve lighting and recognition better. A Keyence intelligent camera is fixed to the middle of the aperture and used for collectingand recognizing geometrical characteristics of target materials. Several materials which are placed on the conveying belt and are different in geometrical shape are arranged under the intelligent camera. An air cylinder supporting frame is arranged on the other side of a material stack, and an air cylinder push rod is erected on the upper portion. An image display screen is arranged in front of an air cylinder. The machine vision shape sorting device has the advantages that the problem of flexibility of feeding and discharging in current robot substitution equipment is insufficient is solved,and economical efficiency, work efficiency and the capacity of adapting to the work condition are improved.

The invention relates to a uric acid microwave biosensor based on an RFID concept. The uric acid microwave biosensor comprises a first substrate, a second substrate and a third substrate which are sequentially stacked, the first substrate is provided with a microfluid channel, the microfluid channel comprises a cavity, and the cavity is used for containing quantitative to-be-detected solution; the second substrate is provided with a metal capacitor structure, and the metal capacitor structure and the cavity are calibrated and bonded; and the third substrate is provided with a resonator module, the resonator module comprises a plurality of separation rings, and the plurality of separation rings are mutually nested to form a complementary structure. The uric acid microwave biosensor has a high quality factor, a to-be-detected solution is fixed in the cavity, so that the detection position and the solution shape are fixed, the detection sensitivity and accuracy of the uric acid microwave biosensor are remarkably improved, and a feasible scheme of close-range non-contact/wireless measurement can be provided when measurement of biosensing response is realized; and the whole detection operation is convenient and rapid, the detection time is saved, and commercialized popularization and application are facilitated.

The invention provides a method for purifying and detecting fipronil and metabolite thereof in eggs, and solves the technical problems of relatively high quantification limit, insufficient detection sensitivity and low detection accuracy of a method for purifying and detecting fipronil and metabolite thereof in eggs in the prior art. The method comprises the following steps: (1) preparing a magnetic nano material; (2) carrying out sample pretreatment; and (3) carrying out detection and analysis by adopting an ultra-high performance liquid chromatography-Q-Exactive high-resolution mass spectrum. According to the method disclosed by the invention, the detection limit and the quantification limit can reach 0.002 to 0.005 [mu] g/kg and 0.006 to 0.015 [mu] g/kg; the method has the advantages ofsimplicity, convenience and quickness in analysis, higher sensitivity and accuracy, better reproducibility, accuracy in quantification, higher recovery rate and capability of accurately analyzing thecontent of fipronil and metabolite thereof in the eggs.

The invention discloses a high-efficiency liquid phase detection method for water-soluble vitamin E derivatives, comprising the following steps: S1, preparing standards for TPGS monoester, TPGS diester, α-tocopherol, and α-tocopherol succinate with different concentrations S2, prepare sample solution; S3, inject the standard solution in S1 and the sample solution in S2 into the liquid chromatograph in sequence, the flow rate is 1.0 mL/min, the column temperature is 25-35°C, and the mobile phase is A mixture of acetonitrile and isopropanol; the high-efficiency liquid phase detection method for water-soluble vitamin E derivatives of the present invention can not only accurately analyze the content of TPGS monoester and diester, but also detect the residual VE and VES content in TPGS products, It is convenient to inspect and control product quality intuitively.

The invention relates to a microRNA marker for detecting acute mountain sickness, and application thereof to preparation of a kit for detecting acute mountain sickness. The content of microRNA-676-3p, microRNA-181b-5p and microRNA-3591-3p in the blood of a testee is detected by means of the quantitative PCR method and the like, and is compared with the normal microRNA level to diagnose acute mountain sickness. The acute mountain sickness molecular marker microRNA has high sensitivity and specificity, operation is convenient, safe and nondestructive, mass screening can be achieved easily, and the effect of combined use is better.

There is provided a mechanochemical sensor including a minute mechanical structure body having the functional membrane formed at least on one part of its surface, a supporting part for supporting the minute mechanical structure body; and a detection part for detecting the change of a mechanical property of the minute mechanical structure body. According to the invention, it is possible to provide improved adhesion between the functional membrane and the minute mechanical structure body since the functional membrane is integrally formed in advance on the minute mechanical structure body, which will contribute to the increase of detection signal, and improvement of measurement precision and sensitivity.

The invention belongs to the technical field of biology, and particularly relates to Vicia sativa ILP molecular marker primers and an application thereof in variety identification. The 41 pairs of molecular marker primers are used for identifying 30 Vicia sativa varieties, can identify a plurality of varieties, and have the advantages of accuracy, high efficiency, rapidness, low cost, conveniencein operation and the like.

The invention relates to a pressure sensor based on surface enhanced Raman scattering. The sensor comprises a substrate layer. A metal layer is arranged above the substrate layer, a cavity is formed between the metal layer and the substrate layer, holes arranged periodically are further formed in the metal layer, and micro-nano metal particle layers arranged periodically are arranged at the positions, located at the vertical projection positions of the holes, above the substrate layer. According to the pressure sensor based on surface enhanced Raman scattering, a pressure signal can be converted into an optical signal, and the pressure is detected by detecting the change of Raman scattering of the optical signal. When pressure is applied to the sensor, pressure extrudes the metal layer, and changes the height of the cavity, so an electromagnetic field generated by incident light between the metal layer and the micro-nano metal particle layer is changed. The intensity of a Raman spectrum characteristic peak is further changed. Pressure detection can be achieved by detecting the change of the Raman spectrum characteristic peak, and higher accuracy and sensitivity are achieved.

The invention provides an optical fiber sensor for monitoring the flow velocity of fluid in a pipeline, and belongs to the technical field of measurement. The optical fiber sensor for monitoring the flow velocity of the fluid in the pipeline comprises an optical fiber, an optical fiber protection armor, an optical fiber fixing hoop, a metal cushion block, a ceramic rod piece, a ceramic sheet, a spring top seat, a spring, a spring base, a reflecting mirror surface, a hollow cylinder, a ceramic shell, a ceramic ring and a bearing. The device realizes real-time monitoring of the flow velocity of the fluid in the pipeline by observing the change of the spectrum in the spectrograph and applying the Fabry-Perot optical fiber interference principle, the principle that the force generated when the fluid flows through the sensor is equivalent to the internal force generated by the spring and the relationship between the fluid resistance and the relative velocity, thereby ensuring the safety and stability of pipeline transportation. The device is low in labor cost, easy to operate and wide in coverage range, and has wide application prospects and popularization markets.

The invention discloses a detection method for bis((2-ethylhexyl)amine in leather and textiles. The detection method comprises the following steps: treating a sample, namely taking a sample to be detected, adding the sample to be detected into an organic solvent, and extracting to obtain extract liquor; and carrying out gas chromatography-mass spectrometry detection. The detection method disclosed by the invention is simple, convenient and rapid, methanol is preferably taken as an extraction agent, after extraction with methanol, bis((2-ethylhexyl)amine is subjected to chromatographic analysis once within 11min under the optimized detection condition, and a good separation effect can be obtained. The method has good linearity when the concentration range of bis((2-ethylhexyl)amine is of 0.1-10mg/L, the linearly dependent coefficient reaches 0.9998, the detection limit reaches 0.1mg/L, the repeatability relative standard deviation is less than 3%, and the sample adding standard recovery rate is 95%-110%, so that the detection method has good application prospect.

The invention relates to a high performance liquid chromatography detection method for tryptophan in fodder and belongs to the technical field of tryptophan detection. The detection method comprises the steps of specially pretreating a sample, preparing HPLC analysis and drawing a tryptophan detection standard curve. The detection method has higher flexibility and accuracy, is low in detection limit, better in repeatability, quick, accurate in qualitativeness and quantitation and higher in recovery rate, can accurately analyze tryptophan in the fodder and can be applied to large-scale sample detection and suitable for standardization.