39results about How to "Detection data is stable" patented technology

The invention relates to a device for using ultrasonic wave to detect the manufacture defect of objects, in particular to a steel cylinder ultrasonic flaw-detecting machine which can also be used for the flaw detection of a steel tube; the device of the invention comprises an electrical control device, a front feeding device, a rear material-moving device, a steel cylinder conveying mechanism, a flaw detection host, a flaw detector, a mark printing mechanism and a water circulation system, wherein, at least three flaw detection hosts are arranged on the steel cylinder conveying mechanism, a driving device of the flaw detection host drives the detected steel cylinder to forward in a screw mode and coupling agents are filled between a probe and the detected steel cylinder. As the flaw detection is carried out by a mode of immerging the ultrasonic probe and the detected steel cylinder into the coupling agent, the flaw-detecting machine of the invention saves the procedures of plugging the mouth of the cylinder and pulling out the stopper, can carry out detection to the steel cylinder continuously and stably, improve the detection efficiency effectively and realize the automatic ultrasonic detection.

The invention discloses a reverse torque detecting device of a one-way bearing. The reverse torque detecting device comprises a left clamp body, a right clamp body and a mandrel. The left clamp body and the right clamp body are the same in structure and are respectively provided with a plurality of threaded holes. Inner holes of the left clamp body and inner holes of the right clamp body are in clearance fit with the outer circle face of the one-way bearing. The left clamp body and the right clamp body are combined through fastening of bolts in the threaded holes of the left clamp body and the threaded holes of the right clamp body, and the outer ring end face of the one-way bearing is fixed. The mandrel is in clearance fit with an inner hole of the one-way bearing, the mandrel is a step shaft, one end of the mandrel is provided with a boss which can fix the inner ring end face on one side of the one-way bearing, and the other end of the mandrel is connected with a gasket for fixing the inner ring end face of the other side of the one-way bearing. The boss and the gasket are fixed to the inner ring end faces on the two sides of the one-way bearing respectively through the bolts. By means of the method, related defects of loading of an ordinary detecting device outer circle can be effectively avoided, and the detected data can be more true, stable and reliable.

The invention discloses a method for detecting N-dimethyl nitrosamine in ranitidine. The method is carried out by adopting a high performance liquid chromatography and comprises the following steps: taking concentrated hydrochloric acid diluted to 42.5% of the original concentration as a diluent; mixing a methanol solution of an NDMA reference substance with the concentration of 3.2 * 10 <-4> mg/mL with a diluent and dichloromethane with the volume being 10 times that of the NDMA reference substance, standing for layering, and taking an organic layer as a reference substance solution; dissolving an NDMA test sample into an isopyknic mixed solution of a diluent and dichloromethane at the concentration of 100mg/mL, then standing for layering, and taking an organic layer as a test sample solution; injecting the reference substance solution and the test solution into a high performance liquid chromatograph, carrying out gradient elution by using the mobile phase A and the mobile phase B asmobile phases, and recording chromatograms; wherein the chromatographic column is ODS-3V C18, 250 mm * 4.6 mm, 5 [mu]m; wherein the mobile phase A is water-methanol in a volume ratio of 65: 35, and the mobile phase B is water-methanol in a volume ratio of 25: 75. Compared with a method published by FDA, the method is more stable in detection data.

The invention belongs to the technical field of robots, and particularly relates to a land-air dual-purpose robot reconnaissance system. Motion detection is carried out by controlling a land-air dual-purpose robot through a background upper computer, a land motion unit and an air motion unit which are designed reasonably to enable to detect enemy targets at a long distance in multiple ways and fora long time, and the collected data can be transmitted back to the upper computer wirelessly. At the same time, a ground motion unit and an air motion unit as well as a ground vibration measurement device and an image acquisition device are reasonably deployed and used, so that the land-air dual-purpose robot has the advantages of diverse functions, high over-obstacle capacity, wide detection range, stable detection data and long endurance.

The invention discloses a micro pressure sensor, comprising an upper conductive electrode, a sensing medium layer and a lower conductive electrode, wherein the upper conductive electrode and the lowerconductive electrode are respectively connected with the upper surface and the lower surface of the sensing medium layer through a first conductive adhesive layer and a second conductive adhesive layer, the sensing medium layer comprises a foamed polyurethane body and an inductive coating layer filled in the surface and pores of the foamed polyurethane body, and the inductive coating layer is composed of the following components: 100 parts of silver nano-conductor aqueous dispersion, 3-5 parts of water-based acrylic resin, alcohol solvent, ketone solvent, 0.4-0.6 parts of polyvinylpyrrolidone, 0.2-0.5 parts of alkylphenol ethoxylate, polyethylene glycol p-isooctyl phenyl ether, bismuth octylate, and toluene diisocyanate. The micro pressure sensor provided by the invention can be bent to be resistant to bend, can sense small pressure, and still has high sensitivity under high pressure. Furthermore, the detection data is stable, and the detection precision is reproducible.

The invention belongs to the field of sound pressure automatic detection of buzzers and loudspeakers in electronics industry, and particularly relates to a sound pressure automatic detection device. The sound pressure automatic detection device comprises a bottom plate, and also comprises a material feeding system, a material clamping mechanism, a material sending mechanism, a detection mechanism and a material unloading system which are arranged on the bottom plate. The material clamping mechanism comprises a material sending plate and a material clamping drive part which is connected with the material sending plate; the material sending mechanism comprises a material sending drive part and a connecting plate connected with the material sending drive part, and the material clamping drive part is fixed on the connecting plate; the detection mechanism comprises a material pressing mechanism and a detection probe, the detection probe and the material sending plate are oppositely arranged, the material pressing mechanism is arranged above the material sending plate, and the material pressing direction is perpendicular to the material sending plate; the material clamping drive part is perpendicular to the driving direction of the material sending drive part. The sound pressure automatic detection device has the advantages that through the bran-new design scheme and with adoption of the special prepared material sending plate, a slide rail and a slide block, linear guide rail positioning and linkage of the air cylinders, the device has the advantages of reasonable layout, stable product transportation, small noise, fast detection speed and stable detection data, greatly reduces the operation time and cost, and improves the work efficiency.

The invention discloses a nasal resistance testing device and method, and relates to the technical field of medical equipment. An airway connection device is connected with a respiratory flow detection device and a pressure detection device separately, the pressure detection device is connected with a data processing device, and the nasal resistance testing device is used for detecting nose ventilation conditions when people breathe. By putting a ventilation pipe C into a mouth of a patient, bilateral nasal resistance can be tested through nasal respiration; by putting the ventilation pipe C into the mouth of the patient and using a nose plug to plug one nasal cavity, the nasal resistance of the other nose cavity can be tested; and by connecting the ventilation pipe C with the nose plug and putting the nose plug into one nose cavity, the patient closes the mouth, and the nasal resistance of the other nose cavity can be tested. Pressure sensors are used for measuring a pressure difference value of anterior and posterior nasal cavities and a pressure difference value of the two sides of a respiratory flow sensor, the respiratory flow sensor is used for measuring a respiratory flow value, and the nasal resistance is calculated by utilizing related airway resistance algorithms. The nasal resistance testing device is simple in structure, convenient to use and easy to disinfect and needs few consumables.

The invention relates to the field of cell culture and detection, in particular to a detection method for inhibiting lymphocyte proliferation in vitro by mesenchymal stem cells. The detection method comprises the following steps: (1) MSC (mesenchymal stem cell) inoculation: taking an MSC suspension, centrifuging the MSC suspension for n times to remove supernate, carrying out resuspending by using a complete culture medium, and then conducting inoculated culture, wherein n is larger than or equal to 1; (2) proliferation removal treatment of the MSCs: conducting proliferation removal on the MSCs finally obtained in the step (1), and performing continuous culture; and (3) lymphocyte proliferation inhibition detection: carrying out co-culture on the MSCs finally obtained in the step (2) and the stained PBMCs (peripheral blood mononuclear cells), and recording the lymphocyte proliferation ability. The detection method for inhibiting lymphocyte proliferation in vitro by the MSCs is simple to operate, stable in detection data and high in lymphocyte proliferation inhibition rate.

The invention discloses a bilateral nasal resistance and nasal flow testing device and method. Two ends of a differential pressure sensor I are separately connected with a ventilation pressure measuring opening I and a ventilation pressure measuring opening II; two ends of a differential pressure sensor II are separately connected with a ventilation pressure measuring opening III and a ventilationpressure measuring opening IV; a data processing device is electrically connected with the differential pressure sensor I, the differential pressure sensor II and a differential pressure sensor III;a breathing flow sensor I is arranged between the ventilation pressure measuring opening I and the ventilation pressure measuring opening II; a breathing flow sensor II is arranged between the ventilation pressure measuring opening III and the ventilation pressure measuring opening IV; the breathing flow sensor I and the breathing flow sensor II separately communicate with the other end of a breather pipe I and the other end of a breather pipe II; and an air pipe valve I and an air pipe valve II are separately arranged on the rear side of the breathing flow sensor I and the rear side of the breathing flow sensor II. The device is convenient and sanitary; the operation is simple, and the influence of a traditional detection ventilation pipeline on a test result is reduced; bilateral nasal cavity resistance and nasal flow can be detected at the same time.

The invention discloses an airflow blocking-type nasal resistance detection device and a method thereof, which relates to the technical field of medical equipment. A mask is connected with a breatherpipe, the breather pipe is connected with the input end of a throttling device, and the breather pipe extends outwards from the output end of the throttling device; the two ends of a first differential pressure sensor are connected with the throttling device; one end of a differential pressure transducer II is connected with one end of the differential pressure transducer I, and the other end of the differential pressure transducer II is arranged in the atmosphere; an electromagnetic valve is arranged on the breather pipe at the output end of the throttling device; and a data processing deviceis respectively connected with a flow detection device and a pressure detection device. The lung pressure is obtained from the outside of the nose by intermittently blocking the breather pipe in thebreathing process, a nasal resistance value is calculated by combining directly measured front nasal cavity pressure and respiratory flow, the nasal resistance detection device is simple in structureand convenient to use, does not need to put a measuring probe into the oral cavity and the nasal cavity, is suitable for people of all ages to use, provides convenience for nasal cavity detection of children, consumes few materials and is easy to disinfect.

The invention provides an intelligent soot blowing system for an air pre-heater, and relates to the field of air pre-heaters, the intelligent soot blowing system comprises a heat transfer element blockage detection module, a soot blowing module and a visual monitoring module, the heat transfer element blockage detection module is used for detecting the specific blockage position of a heat transfer element of the air pre-heater, and the soot blowing module is used for purging and cleaning blockage in the heat transfer element. The visual monitoring module is used for monitoring the blockage and loss conditions of the heat transfer element of the air pre-heater and the surface temperature of the heat transfer element in real time; the modules achieve automatic interlocking control through the main control cabinet, when the heat transfer element blocking detection module detects that a certain area of the air pre-heater is blocked, the intelligent soot blowing system can control the soot blower to directly move to the blocked area in time, a corresponding blowing mode is adopted for processing, and therefore the air pre-heater is prevented from being blocked. Compared with a manual integral purging mode at present, the method is faster in time efficiency, more intelligent and more accurate in judgment, further reduces the consumption of a purging medium, and provides reliable guarantee for energy-saving, emission-reducing and green operation of the boiler.

A power line detection method, a millimeter wave radar (200), a system and a storage medium are applied to the millimeter wave radar (200), and the millimeter wave radar (200) is arranged on an unmanned aerial vehicle (100). The method comprises scanning a to-be-detected area by using a millimeter-wave radar (200) to obtain a plurality of to-be-detected data corresponding to a power line in the to-be-detected area (S101); determining distance information between the power line and the obstacle according to the to-be-detected data (S102); sending the distance information to a ground terminal, so that the ground terminal detects the power line according to the distance information (S103); the millimeter-wave radar (200) is used as a detection device, so that the reliability is high, the influence of environments such as rain, fog and sunlight is hardly caused, and the detection data is stable; the scanned environment data can be processed in real time by means of a computing platform ofthe radar to obtain a detection result, and the routing inspection personnel can be helped to locate a threat area quickly; and the application cost of tree obstacle detection can be reduced to a great extent, the detection result can be acquired in real time around the clock, and the operation efficiency is improved.

The invention discloses an automatic pressure gauge, which includes a base, a display instrument, a socket for a measured object, an instrument transmission socket, a load-bearing device and a pressure adjustment assembly. The display instrument is connected to the instrument transmission socket through a wiring harness. The adjustment assembly includes the main adjustment valve, the first adjustment rod, the position adjustment valve, the second adjustment rod, the piston pressure regulating valve and the third adjustment rod. The second adjustment rod passes through the position adjustment valve and is connected to the socket of the measured object and the instrument Transmission socket, the two ends of the first regulating rod are respectively connected to the instrument transmission socket and the piston regulating valve, the two ends of the third pressure regulating rod are respectively connected to the piston pressure regulating valve and the load-bearing device, and the main regulating valve is linked to the first regulating rod middle part. The automatic pressure gauge has a reasonable structure and is convenient to operate and use, and the accuracy in the detection process can be well maintained through adjustment, thereby helping to better ensure the accuracy of the pressure value.

The invention discloses a nasal resistance measuring instrument controlled by double CPUs, and relates to the technical field of medical equipment. The system comprises a human nasal cavity respiration detection system and a central data processing system, wherein the human nasal cavity respiration detection system is communicated with the central data processing system in a UART mode; a data collecting and processing unit in the human nasal cavity respiration detection system is a Cortex-M3 processor and is used for detecting and collecting bilateral nasal flow data, pressure data and travel switch gear switching data during nasal cavity respiration; and a central data processing unit of the central data processing system is a Cortex-M4 processor and is used for receiving and processing data uploaded by the Cortex-M3 processor through a UART and displaying a test process and a test result to a result display unit in real time. Double-CPU control detection is adopted, the measurement result is more accurate, and a transmission system is more stable.

The invention relates to a methane gas sensor based on an optical material and a monitoring system, the methane gas sensor comprises a substrate, a nano dielectric cylinder layer and a gas sensitive layer which are sequentially arranged in a laminated structure from bottom to top, the nano dielectric cylinder layer is composed of a plurality of nano dielectric cylinders distributed in an array; the upper end and the lower end of each nano dielectric cylinder are connected with the gas sensitive layer and the substrate respectively, the gas sensitive layer is made of a material sensitive to methane gas, the nano dielectric cylinders are made of a material with the dielectric constant larger than 10 at the infrared band of 1530-1565 nm, and the substrate is made of a material with the infrared band of 1530-1565 nm and without absorption loss. According to the invention, the CH4 gas concentration is monitored by using a gas-sensitive mechanism, and the detection data is accurate, stable and reliable; and the gas sensitive layer of the methane gas sensor is in contact with CH4 gas to cause the refractive index change of the gas sensitive layer, so that the reaction in a gas pool can greatly avoid the influence of environmental factors such as temperature and humidity in a coal mine on detection.