108results about How to "Avoid cross interference" patented technology

The invention relates to an infrared photoacoustic spectroscopy detection device and method for decomposed components of sulfur hexafluoride under partial discharge, belonging to the technical field of partial discharge on-line monitoring of SF6 gas insulating electrical equipment. The device of the invention mainly comprises an induction voltage regulator, a corona free experimental transformer, a partial discharge free protective resistor, a standard capacitive voltage divider, a non-inductive resistor, a GIS analog element, a wide-frequency high-speed ultrahigh-capacity digital storage oscillograph and an infrared photoacoustic spectroscopy system. In the method of the invention, infrared photoacoustic spectroscopy detection is carried out on the decomposed gas of SF6 under partial discharge in the GIS analog element by the device of the invention. The invention has high sensitivity, little gas consumption, multiple detection components and strong anti-jamming capability, can effectively detect SF6, CF4, SO2F2, SOF2, SO2, HF and the like as low as 0.01 muL/L, and is suitable for on-line detection. The invention can be widely used for detection of partial discharge decomposed gas of SF6 in the SF6 gas insulating electrical equipment, especially the GIS equipment.

The invention in particular relates to a whole-blood labeled immunoassay method for quickly collecting a target object from whole-blood through specificity binding reaction and labeling and monitoring the target object by a labeling technology, and an instant detection system. The method comprises the following steps: 1) capturing magnetic beads; 2) eluting blood; 3) labeling a detection antibody; 4) eluting the detection antibody; 5) detecting. The system comprises a microfluidic chip, a magnetic field generation device arranged above or below the microfluidic chip and a detection device, wherein the microfluidic chip comprises a microchannel, the magnetic beads arranged in the microchannel, a waste liquid outlet and an eluent storage pond; the microchannel is separated into a first reaction region, a second reaction region and a detection region in stages by a separation mechanism. The technical scheme provided by the invention has the characteristics of high sensitivity, high repeatability, simple system structure, low cost and the like, and can detect the target object from trace blood samples quickly and quantitatively.

The invention belongs to the technical field of food quality and safety detection and particularly relates to a method for rapidly detecting pork, beef, mutton and chicken components in food at the same time through animal genomic DNA (deoxyribonucleic acid) extraction, primer design and UP-M-PCR (universal primers-multiplex-PCR). The four meat components can be distinguished rapidly at the same time according to differential sites of mitochondrial cytochrome b of the animal by using the forward primer sharing and reverse primer specificity strategy and an M-PCR system including five primers. The result shows that the method has the advantages that the detection limit can be up to the pictogram level, the components of the reaction system are free from cross interference and the meat products on market can be detected, verified and distinguished accurately by sampling 80 meat products randomly according to the specificity of the four target meat components. In a word, the invention provides a specific, sensitive and practical multiplex PCR method for rapidly screening four common meat components in food at the same time.

The invention provides a three-channel SPR (surface plasma resonance) sensor based on a seven-core optical fiber. The three-channel SPR sensor comprises a supercontinuum light source, a light injection optical fiber, a seven-core optical fiber coupling device, the seven-core optical fiber, a seven-core optical fiber SPR sensing probe, a receiving optical fiber, a spectrometer, a micro-injection pump, a microfluidic chip and a waste fluid pool, wherein source light is fed into the light injection optical fiber and is then injected into a light injection core of a pair of symmetrical cores of the seven-core optical fiber; switching between three groups of symmetrical fiber cores of the seven-core optical fiber can be realized by a precision rotator of the coupling device; light is subjected to three times of total reflection at symmetrical cone angle structures of the SPR probe at an end part of the seven-core optical fiber and subjected to SPR; reflected light of the probe enters a reflection core of the group of fiber cores, enters the receiving optical fiber through the coupling device and is fed into the spectrometer, an echo attenuation spectrum is collected, a to-be-detected solution is injected into the microfluidic chip by the micro-injection pump, and a waste fluid obtained after measurement flows into the waste fluid pool. The three-channel SPR sensor based on the seven-core optical fiber can realize multi-channel detection and can solve the problem about simultaneous detection of multiple analytes in a mixture in the same sensing area. An SPR segmented detection technology is realized by three groups of cone angle structures with different grinding angles of the seven-core optical fiber, and ultrasensitive SPR segmented optical fiber sensor can be constructed and has very good application prospect in the fields of biology, chemistry and medical treatment.

The invention discloses a cutting machine for foamed concrete blocks, which comprises a rectangular frame and a cutting device. Four guide columns are vertically arranged at four corners of the rectangular frame. The cutting machine is characterized in that the cutting device comprises a transverse cutting mechanism and a vertical cutting mechanism. Compared with the prior art, the cutting machine has the advantages that the transverse cutting mechanism and the vertical cutting mechanism are separately arranged, so that cross interference can be well avoided. Further, since the transverse cutting mechanism and the vertical cutting mechanism are both obtained by basically identical structures, the integral structure is relatively simple, implementation is convenient, and implementation cost is low. Transverse cutting and longitudinal cutting are operated separately, a travelling mechanism drives a cutting wire to reciprocate for extruding cutting during reciprocated friction, and accordingly cutting resistance is greatly reduced while energy loss is reduced. More importantly, smoothness in cutting is improved, concrete blank disintegration is avoided, cutting success rate is greatly increased, and product scrappage is decreased.

Disclosed are an interference coordination method and system, and a network node, so as to avoid the cross interference of uplink and downlink. The method comprises: a first network node determining a minimum common set configured by a TDD UL/DL, a restricted cell and an unrestricted cell, and notifying the restricted cell controlled by a second network node and the unrestricted cell controlled by a third network node of the related information about the minimum common set, wherein the transmission direction of a subframe in the minimum common set remains unchanged, the restricted cell only permits using the subframe in the minimum common set to perform data transmission, and the unrestricted cell permits using all the subframes to perform data transmission; the second network node receiving the related information about the minimum common set notified by the first network node and controlling the restricted cell to only permit using the subframe in the minimum common set to perform data transmission according to the related information about the minimum common set; and the third network node receiving the related information about the minimum common set notified by the first network node and controlling the unrestricted cell to permit using all the subframes to perform data transmission according to the related information about the minimum common set.

The invention provides an urban underground pipe network gas detection device and a detection method thereof. The device comprises an air inlet valve, a gas filtering device, a gas detection chamber, a gas pump and an air exhaust valve which are sequentially connected as well as a microprocessor module, a liquid level detection sensor and a gas sensor which is arranged in the gas detection chamber; and the microprocessor module respectively controls the air inlet valve, the air exhaust valve, the gas pump, the liquid level detection sensor and the gas sensor. The method comprises the following steps of: placing the urban underground pipe network gas detection device into an urban underground pipe network; acquiring the liquid level value in the urban underground pipe network by virtue of the microprocessor module; if the liquid level value is more than a preset liquid level value, controlling the air inlet valve and the air exhaust valve to be opened and controlling the gas pump to be started by virtue of the microprocessor module; and then acquiring the gas concentration value in the urban underground pipe network. The device provided by the invention has the advantages of simple structure, control convenience and high safety and reliability, and the method provided by the invention is simple and practical, has strong applicability and is easy to realize.

The invention discloses a sensor detection device for composite gas. The sensor detection device comprises a gas chamber main body, a gas chamber connector, a sensor group, a pin PCB and a signal processing PCB. The air chamber body is provided with a plurality of independent sensor set installation cavities so that the sensor sets can be isolated from one another, and the air inlet ends of the sensor set installation cavities are communicated with a public air cavity so that the sensors can detect air. A sealing ring is arranged at the joint of the air chamber connector and the air chamber body to form a sealing structure, a containing cavity is formed in the air chamber connector to contain the two PCBs, and a connecting part is arranged at the lower end of the air chamber body. The problems that a traditional all-in-one air chamber is large in size and complex in assembly are solved. Meanwhile, each sensor can make contact with air in a public air cavity area for detection. The problem that an air path of the traditional all-in-one air chamber is redundant is solved, cross interference during measurement of the sensors is avoided, and the T90 testing time of the sensors is greatly shortened.

The invention provides a normal temperature and pressure micro-order heat stability test system and method. The test system comprises a supporting frame, a supporting platform, a CCD camera, an image processing computer, a thermal control heater, a thermal control and program control power source, a temperature measuring element, a thermal control temperature measuring collecting card and a thermal control computer. A tested object is a measuring structure. The measuring structure and the supporting frame are fixed to the supporting platform. The CCD camera is installed on the supporting frame, wherein the installation position meets the condition that the CCD camera can monitor the installation face of the measuring structure and the outer surface of a main supporting structure. The image processing computer is connected with the CCD camera. The thermal control heater and the temperature measuring element are arranged on the surface of the measuring structure, and the thermal control and program control power source is connected with the thermal control heater. The thermal control temperature measuring collecting card is connected with the temperature measuring element, and the thermal control computer is connected with the thermal control and program control power source and the thermal control temperature measuring collecting card. By means of the test system and method, the influence of test noise can be effectively eliminated, and the test precision under the normal temperature and pressure can be ensured.

The invention relates to a device and method for calibrating an electromagnetic radiometer. The device comprises a calibration signal generating module, an antenna, a fixing support and a calibration error display module. The calibration signal generation module comprises a radio frequency signal generator, a signal amplifier, a directional coupler, a power detection module and a controller. The method includes the steps of adjusting the detection position, generating a zero setting calibration signal, calculating a zero setting error, carrying out zero setting processing, generating a linear adjustment calibration signal, calculating a linear adjustment error, carrying out linear adjustment processing, judging whether the zero setting error is zero or not and the like. By means of the device and method for calibrating the electromagnetic radiometer, the produced electromagnetic radiometer can be rapidly and accurately calibrated in the simple environment.

A machine roomless elevator comprises a car (5) within a hoistway (14), a counterweight (1) within a space between said car (5) and a wall of said hoistway (14) and on which a plurality of counterweight suspension wheels (2) are arranged, and a traction sheave (13). Hoist ropes (4) can be devided into a plurality of groups corresponding to the number of said counterweight suspension wheels (2) after one ends thereof round said traction sheave (13), each group being fixed on a counterweight side termination after rounding corresponding one of said counterweight suspension wheels (2).

A test method for vitamin B12 in milk and milk powder includes steps of a, mixing original samples of milk or milk powder quantitatively and uniformly to obtain a solvent; b, sterilizing the solvent to obtain a sterile solvent and then storing the sterilized solvent; c, preparing a culture base solution of vitamin B12, sterilizing the culture base solution to obtain a sterile base solution and then storing the sterile base solution; d, preparing standard substance solutions with different vitamin B12 concentrations; e, adding the sterile base solution, the solvent and the standard substance solutions into corresponding micropores of a microporous plate to obtain test fluids by means of incubating; f, enabling microorganisms to suspend in the test fluids and then reading the turbidities of the microorganisms by an ELISA reader; g, drawing standard curves of concentrations of vitamin B12 in the test fluids and the turbidities of the test fluids; and h, substituting the turbidity of the test fluid corresponding to the solvent into the standard curve to calculate and obtain the concentration of vitamin B12 in milk or milk powder. The test method is simple in operation, the microporous plate is disposable so that cross infection in test is avoided, and reproducibility of results is good.

The invention relates to a method for simultaneously, rapidly and quantitatively analyzing multiple gas pollutants in flue gas, which specifically comprises the following steps: S1, data preprocessing: acquiring an absorption spectrum of gas to be detected under an ultraviolet band, intercepting the band according to a characteristic absorption spectrum of target gas, carrying out differential treatment on the intercepted spectrum, and then carrying out Fourier transform; s2, modeling and prediction: if the intercepted characteristic wave band is a pure characteristic spectrum wave band of thetarget gas (i.e., the absorption of other gases except the target gas in the wave band or the absorption after data preprocessing can be ignored), selecting a unary correction regression model for modeling or prediction, otherwise, selecting a multivariate correction regression model for modeling or prediction. According to the method for simultaneously, rapidly and quantitatively analyzing the multiple gas pollutants in the flue gas, the problems of cross interference and spectrum overlapping among the multiple gases can be effectively solved, and simultaneous, rapid and accurate detection of the concentrations of the different gas pollutants in the flue gas is achieved.

The invention relates to a preparation and detection method of a tetracycline aptamer sensor based on a screen-printed electrode. The surface of the screen-printed electrode is modified with an ionic liquid and ferroferric oxide layer by layer and then left to stand at a normal temperature until the surface is dried, and then tetracycline aptamer is fixed on the surface of the screen-printed electrode modified with a nanometer material. The preparation and detection method of the tetracycline aptamer sensor based on the screen-printed electrode well solves the problem about complicated procedures of current electrode pre-treatment, the same batch of electrodes have good uniformity and can be produced in batch, and commercialization is realized. The sensor has better sensitivity, stability and specificity and good regeneration capacity and is very suitable for situations when on-site quick detection of antibiotic residues is required; the recovery rate of the sensor meets requirements.

Apparatus for use in one of a plurality of sensors each having a respective transmitter which transmits pulses for sensing, a respective clock which controls timing of the pulses transmitted from the respective transmitter, and a respective receiver which receives echoed instances of the pulses. The apparatus comprises: sensing logic configured to sense a being or object in dependence on the echoed pulses received back by the respective receiver from the respective transmitter, and timing logic configured to compensate for a clock discrepancy between the respective clock and that of one or more others of the sensors. The timing logic does this by using the respective receiver to listen for instances of the pulses from the one or more other sensors, and adjusting the timing of the pulses from the respective transmitter based thereon.

The present invention provides a multiple microRNA detection method of a silver nano-cluster based on an entropy-driven amplification system as a template and belongs to the technical field of life analysis chemistry. An entropy-driven catalytic reaction is used as an amplification element, the silver nano-cluster prepared by using a three-chain compound in the catalytic reaction as a template isused as an optical label, and the multiple microRNA detection is simply, quickly and sensitively carried out. microRNA triggers branch migration and chain substitution of the three-chain compound forming the luminescent silver nano-cluster, so that a structure of the silver nano-cluster is changed, fluorescence is sharply reduced, a reduction degree is positively correlated with concentration of the microRNA, and meanwhile, the microRNA is released for a new round of detection to generate changes of amplified fluorescence signals. The detection method economically and efficiently realizes independent detection and simultaneous multiple detection of miRNA-141 and miRNA-155.

The invention discloses a staining method using fluorescence quenching time difference. The staining method comprises the following steps of: dewaxing a histopathological section to obtain a section to be treated, and carrying out fluorescence staining on the section to be treated at least once by using a fluorescence staining reagent with a preset antibody to obtain fluorescence staining sectionscomprising preset fluorescence labels; quenching the preset fluorescence labels generated in the previous fluorescence staining before carrying out the next fluorescence staining; and scanning each fluorescence staining section to obtain a fluorescence image; quenching the preset fluorescence labels, coloring and staining the section to be treated by using a hematoxylin eosin staining method to obtain a colored and stained section, and scanning the colored and stained section to obtain a colored image; and performing image superposition fusion processing on the at least one fluorescence imageand the colored image to obtain a cross-staining fusion image. Therefore, the staining method can meet requirements of the stained image on the observation range and the staining specificity. In addition, the invention further provides a staining device and staining equipment using the fluorescence quenching time difference, and a medium.

The invention discloses a multi-sheath atmospheric chemical laminar flow reaction system. The system comprises a reaction main body and a heat preservation tube, the reaction main body is nested in the heat preservation tube, the reaction main body comprises three layers of reaction quartz tubes, one ends of the three layers of reaction quartz tubes are fixedly connected through a reducing joint,air inlets are formed in one ends of the reaction quartz tubes at the two inner layers, hexagonal spokes are arranged at the other ends of the reaction quartz tubes, and an air outlet is formed in oneend of the reaction quartz tube at the outermost layer. According to the system, reactants have short reaction residence time, experimental conditions can be changed as needed, the reaction tubes aremade of quartz materials and inert and have no holes, the light transmission is good, experimental interference is effectively reduced, multi-stage reaction can be simultaneously performed, cross interference is prevented, practicability is improved, the reaction tubes are provided with the hexagonal spokes to increase airflow stability and prevent turbulence, the system is convenient to disassemble, and manufacturing and maintenance costs are effectively reduced.

The present invention discloses a noise-shielded capacitive touch device, which includes a first sensor region, a second sensor region and a shielding layer. Each of the first sensor region and the second sensor region includes plural sensing lines and driving lines. The sensing lines are in parallel with each other and extend along a first direction. Each sensing line has an extension portion at its end near the other sensor region. The driving lines are in parallel with each other and extend along a second direction, wherein the second direction intersects the first direction. The extension portions and the shielding layer form an electric field wall to avoid cross interferences between the two sensor regions.

A multi-color stimulated radiation exhaustion super-resolution imaging device comprises a plurality of excitation light sources, a loss light source, a photoelectric detector, a control unit and an optical system. The optical system comprises a plurality of shutters which are located on exciting light optical path output by each excitation light source respectively. The control unit makes that the plurality of shutters open by turns so that excitation light output by each excitation light source successively irradiates an imaging area. On the device, multiple paths of excitation light carries out sample excitation and a same path of STED loss light is used to carry out fluorescence quenching so that STED simultaneous multicolor super-resolution imaging is realized and a condition that image deviation is generated among channels is avoided. Besides, in the imaging device, the shutters are used to open and close excitation and detection of the different channels respectively, line scanning mode imaging is realized and a cross interference problem among the plurality of channels is solved.