77results about How to "Fast detection response" patented technology

The invention relates to a quick test strip used for detecting the hydrogen peroxide in food, and belongs to the biological detection technical field. The invention comprises an insulation waterproofing substrate, a reaction substrate substance membrane piece, a filtering layer, an isolation piece and a cover piece, wherein, the insulation waterproofing substrate adopts a foundation base, and round hole is arranged on the insulation waterproofing substrate, and the reaction area of the test strip is assembled on above the round hole according to the order of the reaction substrate substance membrane piece and the filtering layer and by covered in sequence, the isolation piece is covered on the two ends of the reaction area, and the cover piece is arranged above the reaction substrate substance membrane piece, the filtering layer and the isolation piece, a round hole is arranged on the cover piece, and the round hole is arrayed to the round hole on the insulation waterproofing substrate. Detecting the hydrogen peroxide by the test strip, the pre-treatment of the sample is simple, and the detection time is short, being generally less than 90 seconds; the detection limit reaches 0.5 ppm, the reproducibility is good, the effective preservation time of the test strip is one year, and the quick in-place detection of the hydrogen peroxide in the food can be realized.

The invention discloses an early warning and fire extinguishing system and method for thermal runaway of a lithium ion battery. A battery gap is formed above a battery monomer, a fire extinguishing assembly is arranged outside a battery pack, and the fire extinguishing assembly is connected with an agent nozzle located inside the battery pack through a release pipeline. One end of a fire detectionpipe is connected with the fire extinguishing assembly, the fire detection pipe is distributed in the battery pack along a gap above a battery pressure relief opening, and the tail end of the fire detection pipe is connected with a pressure gauge. A sensing assembly is located inside the battery pack and comprises a temperature sensor, a gas sensor and a smoke sensor, and a controller is electrically connected with the sensing assembly. The temperature sensor is used for acquiring the temperature inside the battery pack, the gas sensor is used for monitoring gas inside the battery pack, and the smoke sensor is used for monitoring smoke inside the battery pack. The controller is further electrically connected with the pressure gauge, and the pressure gauge monitors the pressure change inside the fire detection pipe. The early warning and fire extinguishing system and method for the thermal runaway of the lithium ion battery are not affected by the spatial position, one-dimensional infinite point temperature detection and fire detection are achieved, the response speed is high, and the fire can be extinguished rapidly.

The invention discloses a solid nitrate ion electrode based on conductive polyaniline and a preparing method thereof. The solid nitrate ion electrode comprises a metal wire, the conductive polyaniline, soluble conductive polyaniline, nitrate ion sensitive film and a heat shrink tube, wherein a layer of the conductive polyaniline is electroplated on the surface of the lower portion of the metal wire, a layer of the soluble conductive polyaniline is wrapped on the outer surface of the conductive polyaniline, the nitrate ion sensitive film is wrapped on the outer surface of the soluble conductive polyaniline, and the heat shrink tube is wrapped on a portion located in the middle of the metal wire and with a distance greater than 0.5-1cm from the end portion of the nitrate ion sensitive film. The solid nitrate ion electrode based on the conductive polyaniline has the advantages of being high in mechanical strength, large in toughness, high in sensitivity, small in size, quick in detection response, low in detection limit, long in service life and the like. When matched with a solid reference electrode for use, the solid nitrate ion electrode based on the conductive polyaniline is applicable to on line detection and long-term in situ monitoring of nitrate ion content in seawater, aquaculture water, and chemistry or chemical industry water mediums.

The invention belongs to the nano technology and biomedicine technical field, and particularly relates to a microorganism automatic cultivation system adopting a nano sensor. The system mainly comprises a specially designed culture flask, a nano sensor detector and a device for control, display and record. A separation film in the culture flask separates culture solution from pure water or air, and only CO2 can pass through the separation film. After a specimen is inoculated, the culture flask can carry out automatic temperature regulation and shake culture, and, at the same time, can monitor the generation status of CO2 in the flask through detecting the potential difference between electrodes formed by a nano film or a nano wire (rod) array, a metal oxide nano wire (rod) array and a counter electrode arranged on the side of the pure water or air. An obtained signal is transmitted into a computer for analysis and is judged as a positive result once the signal exceeds a preset threshold value, and the computer can automatically give an alarm. The system which can replace the prior automatic cultivation system in current use can improve a positive detectable rate with high sensitivity and simple operation.

The invention provides a use and method for detecting sulfate ions based on a cysteamine-modified nano-gold solution, the detection method comprising the following steps: adding a buffer solution to the cysteamine-modified nano-gold solution, and after stabilization, Then add the sulfate ion solution to be measured and react, wherein the buffer solution used is sodium acetate-acetic acid; step 2 is to measure the sulfate ion by visual colorimetry or measuring the ultraviolet-visible absorption spectrum to the reaction solution obtained in step 1. concentration. The invention changes the currently commonly used detection mode for detecting sulfate ions, does not need complicated operation process and expensive large-scale instruments, and saves cost. Moreover, the detection method of the present invention has the advantages of high specificity, high sensitivity, fast detection response, etc., and is an effective and practical detection method.

The invention discloses an intelligent blood detector based on internet of things. The tester is characterized by comprising the following parts: a molecular recognition functional module for acquiring super high sensitivity, aiming at different markers to be tested, and corresponding substrate materials and structures; a signal conversion functional module for conversing results of reactions between the markers to be tested and the substrate materials to an electrical signal; an embedded intelligent analysis module aiming at that different diseases can affect a same marker, and age and special status like pregnancy can also cause abnormality of markers; and a network communication functional module capable of transmitting detected results to a comprehensive medical service platform through a wireless or wired way, so as to facilitate comprehensive analysis. The invention adopts an advanced microfluidic chip technology, a micro spectrophotometric detection technology, wireless internet of things technology, and integration mechanism of the technologies, so that the sensor and a computer analysis system can be closely integrate, and seamlessly connected.

The invention discloses a naked eye or fluorescent Al<3+> probe and a preparation method and an application thereof, relates to an Al<3+> probe and a detection method thereof, and solves the technicalproblems that an existing Al<3+> probe is relatively few in type, easy to interfere by external environment, relatively high in detection limit and incapable of realizing naked eye detection and real-time detection. The structure of the Al<3+> probe is as shown in the description. The preparation method comprises the following steps of reacting 2-(4-amino)phenyl phenanthroimidazole and p-phthalaldehyde in an acid solvent, adjusting the pH value to separate out solid, and performing suction filtration and drying to obtain a crude product; and recrystallizing and drying the crude product to obtain the naked eye or fluorescent Al<3+> probe. Al<3+> in a solution can be qualitatively detected through naked eye observation of color change and fluorescence intensity change or is quantitatively detected by using a fluorescence intensity standard curve method. The Al<3+> probe can be used in the field of detection of the Al<3+> in water systems or beverages.

The invention discloses a gas sensor with a gas chromatographic analysis function, and relates to the field of gas detection. The gas sensor comprises a degassing device, a gas detection device and agas circuit driving device, wherein the degassing device is used for separating gas from drilling fluid; the gas detection device is connected with the degassing device, and used for performing gas chromatographic analysis; the gas circuit driving device is used for driving the gas in the degassing device into the gas detection device; the degassing device comprises a gas-liquid separation chamberformed by enclosure of a semi-permeable membrane; the gas detection device comprises a hollow optical fiber, an infrared light source positioned at the end of the hollow optical fiber, and a wavelength scanning detector; and the inside of the hollow optical fiber communicates with the gas-liquid separation chamber through a communicating pipe. Since gas-liquid separation and gas chromatographic analysis can be realized only through the semi-permeable membrane and the hollow optical fiber, compared with degassers, gas chromatographs and the like in the prior art, the sensor is compact in size,stable in efficiency, light in weight, easy and convenient to carry and install, thus lowering the cost of operation.

The invention discloses a high-detection-precision face recognition method, and the method comprises the steps: S1, image collection: employing a high-definition camera to complete the image collection; s2, portrait detection and positioning: positioning and detecting the human face in the image acquisition in the step S1 by using OpenCV, wherein in the step, fuzzy correction processing is included, feature point position marks are extracted, and the distance between the eyebrow center position and the used feature points is used as posture features for re-detection and re-positioning; and S3,feature extraction: completing feature extraction and modeling on the cloud platform by using one or more of boost, mlp, knearest, nbays, svm and rtrees machine learning algorithms, and finally performing model comparison to complete face recognition. The method has the advantages of being high in recognition speed, high in recognition accuracy, advanced in technology, good in system expansibility and the like.

The invention relates to a USB power supply interface-based intelligent power source. The USB power supply interface-based intelligent power source includes a power storage carrier, a control module, a power supply control module, a USB power supply interface and a power supply control switch; the USB power supply interface includes a positive pole power supply end, a negative pole power supply end, a data line positive end, a data line negative end and a voltage comparator; the power supply control module is connected with the control module, the power storage carrier and the positive pole power supply end of the USB power supply interface respectively; the power storage carrier is connected with the control module; the grounding end of the control module is grounded; after passing through the power supply control switch, the negative pole power supply end of the USB power supply interface is grounded; the data line positive end and the data line negative end of the USB power supply interface are respectively connected with the voltage comparator; and the voltage comparator is connected with the control module. According to the USB power supply interface-based intelligent power source of the invention, the data line positive end and the data line negative end on the USB power supply interface can be detected, so that whether a load exists on the USB power supply interface of the power source can be accurately judged.

The invention provides a method and a device for preventing a vehicle from colliding with a road edge. The method comprises the following steps: S1, collecting distance signals for reflecting the distance between the vehicle and the road edge, wherein the distance signals are generated by at least two distance sensors arranged at the same side of the vehicle; acquiring vehicle speed signals generated by a vehicle speed sensor; S2, judging whether the vehicle has a tendency of colliding with the road edge or not according to the distance signals, if yes, executing the step 3; if not, returning to the step 1; S3, calculating estimated time that the vehicle collides with the road edge according to the vehicle speed signals; S4, judging whether the estimated time is greater than a threshold value or not, and if yes, giving an alarm; if not, performing aided driving intervention while the alarm is given. The method and the device provided by the invention aim to prevent the vehicle from colliding with the road edge when the vehicle runs on a left-most or right-most lane.