32results about How to "Avoid detection interference" patented technology

The invention relates to the technical field of microfluidic chip chemiluminescent immunoassay, in particular to a chemiluminescent detection microfluidic chip and a chemiluminescent detection microfluidic chip system and application thereof. The chemiluminescent detection microfluidic chip comprises a sample feeding unit (1), a liquid storage unit (2), a reaction unit (3) and a waste liquid unit(4), and further comprises a quantifying unit (5) for quantifying a sample to be detected, wherein the quantifying unit (5) comprises a liquid inlet (51) connected with the sample feeding unit, a liquid outlet (52) connected with the waste liquid unit, a quantifying structure (53) for quantifying, and a temporary storage structure (54) for temporarily storing excess liquid, which is connected withthe reaction unit. The chemiluminescent detection microfluidic chip system consists of three layers, namely an upper layer, a middle layer and a lower layer; the middle layer is the chip; the upper layer and the lower layer are used for closing the middle layer; the upper layer is provided with a sample feeding hole connected with the sample feeding unit and a yielding hole corresponding to the liquid storage unit. The chemiluminescent detection microfluidic chip is simple in detection process, can quantify the reaction sample and has high sensitivity and strong repeatability.

The invention relates to the field of micro-fluidic chip molecular diagnosis, and in particular to a molecular diagnosis micro-fluidic chip, a molecular diagnosis micro-fluidic chip system and applications of the molecular diagnosis micro-fluidic chip and the molecular diagnosis micro-fluidic chip system. The chip comprises a sample injection unit (1) which is used for receiving to-be-detected samples, at least one liquid storage unit (2) for storing reaction reagents, a cell lysis unit (3) for conducting cell lysis and a nucleic acid amplification unit (4) for conducting nucleic acid amplification, wherein the cell lysis unit comprises a slit (31) as well as a first compartment (32) and a second compartment (33) which are separated by virtue of the slit; at least one compartment is configured with grinding micro-beads; the first compartment communicates with the sample injection unit; and the second compartment communicates with the at least one liquid storage unit, so as to receive acell lysis solution. The chip system is composed of three layers, namely an upper layer, a middle layer and a lower layer, wherein the chip is arranged on the middle layer; the upper and lower layersare used for covering and sealing the middle layer; the upper layer is provided with a sample injection hole which is connected to the sample injection unit, and the sample injection hole correspondsto an avoiding hole of the liquid storage unit. The chip is simple in detection process, high in sensitivity and strong in repeatability, and reaction samples can be quantified.

The invention relates to the technical field of biochemical detection of micro-fluidic chips and in particular relates to a biochemical detection micro-fluidic chip, a biochemical detection micro-fluidic chip system and applications thereof. The chip comprises a sampling unit (1), a reaction unit (3) and a waste liquid unit (4) and a first quantifying unit (5); the first quantifying unit (5) is used for quantifying a to-be-detected sample and is composed of a first slit (51) as well as a first sample chamber (52) and a second sample chamber (53) which are separated by the first slit (51); thefirst sample chamber communicates with the sampling unit, and the second sample chamber communicates with the waste liquid unit; and a third error reporting unit (14) is arranged between the reactionunit and the waste liquid unit and is provided with a chamber for receiving the to-be-detected sample from the reaction unit. The chip system is composed of three layers including an upper layer, a middle layer and a lower layer; the middle layer is the chip; the upper layer and the lower layer are used for covering and sealing the middle layer; and a sampling hole connected with the sampling unitand a demising hole corresponding to a liquid storage unit are formed in the upper layer. The chip is simple in detection process, capable of quantifying a reaction sample, high in sensitivity and strong in repeatability.

The present invention discloses an automotive door assembly checking fixture which comprises positioning pins (10) which are fixed on the automotive door assembly checking fixture. Each positioning pin (10) comprises a shaft sleeve (11) and a pin (12) which is movably mounted in the shaft sleeve (11). When the automotive door assembly checking fixture detects the edge of the automotive door assembly, the pin (12) is accommodated in the shaft sleeve (11). When the automotive door assembly checking fixture detects an automotive door inner board of the automotive door assembly, the pin (12) extends out of the shaft sleeve (11). Furthermore, the invention also discloses a detection method for detecting the automotive door assembly with the automotive door assembly checking fixture. Because each positioning pin on the automotive door assembly checking fixture according to the invention has a telescopic structure, the detection method for detecting the automotive door assembly through the automotive door assembly checking fixture can prevent detection interference in the detection process for the edge of the automotive door assembly and optimizes detection process of the integral body of the automotive door assembly.

Provided is a detection method of an electrochemical acute leukemia gene Pax-5a based on enzyme assisted cyclic signal amplification; the efficiency advantage of transcription termination and translation is controlled based on a hairpin DNA probe (HP). The target gene Pax-5a opens HP, and the replication template function of the HP is started. Under the synergistic effect of DNA polymerase and restriction endonuclease, on one hand, auxiliary DNA promotes the target gene Pax-5a to cyclically open the HP; on the other end, a large number of G-quadruplex sequences are produced. The G-quadruplex sequences are captured by a sulfhydryl-modified probe on the surface of a gold electrode due to the complementary action of bases, then a G-quadruplex / hemin complex is formed in the presence of hematinchloride and potassium ions, and hydrogen peroxide can be catalyzed to reduce so as to generate electrochemical signals; the change of the current has linear correlation relationship with the concentration of the target gene in a certain range. Based on the mechanism of enzyme assisted cyclic signal amplification of the hairpin DNA probe and a one-key electrochemical detection platform, high-sensitivity and high-selectivity detection of the target gene can be achieved.

The invention discloses an integrated power distribution device installation frame which comprises a shell with an installation cavity, a plurality of installation plates are fixed in the installation cavity in the left-right direction, each installation plate is arranged in the front-back direction of the installation cavity, and an installation area for installing a current sensor is formed between every two adjacent installation plates or between the installation plate and a side plate of the shell. At least one installation area is internally provided with a plurality of mounting structures for mounting the current sensors, the plurality of mounting structures are arranged in the front-back direction of the mounting cavity and are different in height, the current sensors can be obliquely mounted on the mounting plate, so that the detection holes of the current sensors are obliquely upward, and the heights of the plurality of current sensors in the installation areas are different. Compared with the prior art, the device is used in multiple power distribution loops and a power distribution device which is provided with multiple current sensors to detect the current of each power distribution loop, so that space is saved, arrangement is compact, the final size of the power distribution device is small, and mutual interference among the multiple power distribution loops is avoided. The invention also discloses a corresponding integrated power distribution device.

The invention discloses a visual inspection error prevention system and a position correction method for articles transported by a conveyor belt, and belong to the field of visual inspection. The system comprise a camera, wherein the camera is erected above a conveying device through a camera bracket; and the system is characterized in that the color of a carrying platform of the conveying deviceis more than one, the various colors are arranged on the carrying platform in a staggered mode, the camera is connected to a controller, and the communication end of the controller is connected to a control system of the conveying device; and an induction device is arranged and used for detecting the advancing position of the conveying device, the signal output end of the induction device is connected to the controller, and the controller controls the camera to shoot after receiving a control signal of the induction device. According to the system, detection interference caused by corresponding consistency of the color of the detected object and the color of the detected object carrying platform is avoided, whether the object is in the center of the carrying platform or not can be detected, and object deviation data can be calculated.

The invention discloses a battery charging control method, which comprises the following steps of: charging a battery under the control of a single chip microcomputer serving as a controller, disconnecting a charging circuit after the battery is charged for a preset period time, returning the battery voltage to the actual voltage, and detecting the voltage after the battery voltage is reduced to be stable, so that the detection interference caused by the charging voltage can be avoided; compared with an existing method for charging the battery through charging equipment, the method has the advantages that the charging effect is better, the phenomenon that the battery is overcharged is avoided, when the battery is fully charged, the voltage of the battery is closer to the full-charge voltage, namely the rated voltage, of the rechargeable battery, the performance of the battery is improved, and the service life of the battery is prolonged; in addition, according to the scheme, the single-chip microcomputer is selected as a controller to control charging, and the cost is reduced.

The electronic product production screening equipment with the flatness detection mechanism comprises a conveying unit and a detection unit, the detection unit is arranged on the middle section of the conveying unit, a feeding unit is arranged on one side of one end of the conveying unit, and a control unit is arranged on the other side of the feeding unit. A discharging unit is arranged on the other side of the conveying unit, the conveying unit comprises a detection table, and an electric sliding rail is arranged at the top end of the detection table. According to the screening equipment provided with the flatness detection mechanism and used for electronic product production, the moving base, the clamping air cylinder, the clamping plates and the limiting plates are arranged, when a product is pushed to the moving base, the clamping air cylinder pushes out the clamping plates, the clamping plates and the limiting plates clamp the product from the two sides, and the product moves to the detection unit along with the moving base to be subjected to surface flatness detection; according to the mechanism, through automatic clamping and whole-course conveying, the detection speed is greatly increased, and the problem of low moving stability is solved.

A control method and a control device for a PWM rectifier, the fault of the input source of the PWM rectifier can be accurately and quickly detected, thereby ensuring the reliability of fault detection. The control method of the PWM rectifier includes: detecting the DC bus voltage of the PWM rectifier; when the DC bus voltage of the PWM rectifier is lower than a set value, controlling the PWM rectifier to be in a rectification mode, and energy flows from an input source of the PWM rectifier to a load.

The invention relates to a method for detecting object-passing and a system thereof. The method includes steps of: (a) providing an object to pass through an area; (b) arranging a wireless identifier provided with a first polarization antenna on a side of the area, wherein the first polarization antenna can transmit a first polarization wave to a metal part of the object and the metal part can reflect the first polarization wave and converting the first polarization wave to a second polarization wave in the opposite polarization direction of the first polarization antenna; and (c) arranging a wireless identifying label in the reflection direction of the first polarization wave, wherein the wireless identifying label is provided with a second polarization antenna and the polarization antenna is opposite to the polarization direction fo the first polarization antenna, so that the second polarization antenna can receive the second polarization wave and lets the wireless identifying label act. Therefore, object-passing can be judged.

A shared terminal detection method and a device therefor are disclosed. The shared terminal detection server detects whether the terminal is a shared terminal by the following items: receiving web access traffic for connecting the terminal to the web server, transmitting a response message to the terminal requesting reconnection to the web page for IP detection, The web page describes the real-time web communication request and obtains the private IP address of the terminal identified by the STUN server.

The invention provides an intelligent formaldehyde detector, capable of automatically performing intelligent formaldehyde concentration classification detection according to preliminary formaldehyde concentration data detected by a formaldehyde detector. When a sensor preliminarily detects a fact that formaldehyde concentration is relatively low, specific formaldehyde concentration is identified by using a reagent method, a user is reminded of residual reserve level of a formaldehyde absorption reagent and the user is reminded to add a formaldehyde absorption reagent box; and when the sensor preliminarily detects a fact that the formaldehyde concentration is relatively high and toxicity can be produced to a human body, the formaldehyde concentration is further detected by using a gas chromatography method, the user is prompted to open an air purification channel as soon as possible, after a period of time, the formaldehyde concentration is detected by continuously using the gas chromatography method, and if the formaldehyde concentration after a period of time is continuously increased and reaches a concentration harmful to the human body, the user is prompted to be evacuated as soon as possible.

The invention discloses a visual inspection error prevention system and a method for correcting the position of articles transported by a conveyor belt, belonging to the field of visual inspection, comprising a camera, and the camera is erected above a transportation device through a camera bracket, and is characterized in that the color of the carrying platform of the transportation device is More than one, various colors are alternately arranged on the carrying platform, the camera is connected to the controller, and the communication end of the controller is connected to the control system of the transportation device; an induction device is installed, the induction device detects the traveling position of the transportation device, and the The signal output end is connected to the controller, and the controller controls the camera to shoot after receiving the control signal from the sensing device. The present invention avoids the detection interference caused by the color of the detected article corresponding to the color of the detected article carrier platform, and can detect whether the article is in the center of the carrier platform, and can calculate the data of the article deviation.

The invention relates to a preparation method and application of a Mn-doped ZnS quantum dot surface imprinted fluorescent probe, which belongs to the technical field of environmental functional material preparation; the invention utilizes a free radical polymerization method to synthesize a pseudo-template of a molecularly imprinted polymer using propionamide, Methacrylic acid (MAA) was used as functional monomer, Mn-doped ZnS quantum dot graphene oxide (Mn:ZnS@GO) was used as matrix material, ethylene glycol dimethacrylate (EGDMA) was used as cross-linking agent, azobis Isobutyronitrile (AIBN) is an initiator, and N,N-dimethylformamide (DMF) is a solvent to synthesize a surface molecularly imprinted fluorescent probe, which is used to enrich and detect acrylamide in food; the method of the present invention The prepared fluorescent probe not only embodies the advantages of surface molecular imprinting, avoids too deep embedding of molecularly imprinted polymer template molecules prepared by traditional methods, improves the recognition efficiency and binding speed, but also takes into account the high luminous efficiency and Fast fluorescence decay and other advantages improve the detection rate and sensitivity.

The invention discloses a vehicle door assembly inspection tool. The vehicle door assembly inspection tool includes a positioning pin (10) fixed on the vehicle door assembly inspection tool. The positioning pin (10) includes a shaft sleeve (11) and a movable mounting The pin shaft (12) in the shaft sleeve (11), when the door assembly inspection tool detects the edge of the door assembly, the pin shaft (12) is stored in the shaft sleeve (11); When the vehicle door assembly inspection tool detects the vehicle door inner panel of the vehicle door assembly, the pin shaft (12) protrudes from the shaft sleeve (11). In addition, the invention also discloses a detection method for detecting the vehicle door assembly by using the above-mentioned vehicle door assembly inspection tool. Since the locating pin on the vehicle door assembly inspection tool of the present invention is a retractable structure, the detection process at the edge of the vehicle door assembly can be avoided by using the vehicle door assembly inspection tool to detect the vehicle door assembly. In the detection interference, the overall detection process of the door assembly is optimized.

The invention relates to a pH value detection method and a pH value detection device based on image processing, wherein a pulse signal sent by a single-chip is sent to a stepper motor, a connection rod is driven to rotate by the stepper motor, fluid to be detected is injected to pH test paper through an injection orifice of the fluid to be detected when an external end of the pH test paper falls to the center of the injection orifice of the fluid to be detected, and the pH test paper is shot by a CCD (charge coupled device) sensor under the light condition of an illuminating lamp when the pH test paper continuously falls to the center of a through groove in an image acquisition device box, so that the image acquisition of the color change signals is finished; and the acquired images are input into the single-chip for preprocessing and then are converted into an HIS color space, three characteristic value data of the color change blocks including H, I and S in the space are extracted, three characteristic values are input into a relation model both of a pre-built color block and the pH value, and the pH value is calculated, so that the online automatic detection of the pH value is realized and the influence of the human factors in the artificial reading process is avoided.

The invention provides a method for determining desoxyquinocetone and 3-methylquinoxaline-2-carboxylic acid in seawater, and belongs to the technical field of detection of pollutants in seawater. According to the method, the MAX column is adopted to enrich and purify the desoxyquinocetone and the 3-methylquinoxaline-2-carboxylic acid in the seawater, so that the determination of the low-concentration desoxyquinocetone and the 3-methylquinoxaline-2-carboxylic acid in the seawater can be realized; and according to the method, the adsorption column is eluted with water to remove most of water-soluble impurities, and then the adsorption column eluted with water is eluted with the ethyl acetate solution of formic acid, so that the content of other substances in the to-be-detected liquid can be reduced, interference on detection of desoxyquinocetone and 3-methylquinoxaline-2-carboxylic acid is avoided, and the detection sensitivity is improved.

The invention discloses expression, purification and application of (i) E.coli ( / i) O157:H7 flagellin H7 antigen segment, relating to the field of genetic engineering technology, vaccine and diagnostic reagent. According to computer analysis, strong antigen epitope in (i) E.coli ( / i) O157:H7Flic protein is screened out, totally 131 amino acid, from 215th amino acid to 345th amino acid, codon preferred by prokaryote is selected for chemical synthesis of a brand-new gene sequence of the antigen epitope, by genetic engineering technology, the gene segment is expressed, and the strong antigen epitope segment of the (i) E.coli ( / i) O157:H7Flic protein is prepared. The expressed protein can be used for detection of (i) E.coli ( / i) O157:H7 infected antibody and preparation of monoclonal antibody and polyclonal antibody.