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 relates to a dynamometer for an automobile chassis, aiming at solving the shortages that the existing dynamometer for the chassis has unstable detection data, low accuracy and poor reliability, is difficult to correctly evaluate the power performance of the vehicle and the like, and the defects that the dynamometer can not realize the compatibility of power performance detection function and emission inspection function. The invention provides a dynamometer for the automobile chassis, comprising a stander, an anti-drag motor, an eddy current machine, a force measurement sensor and a speed sensor arranged on the eddy current machine, and a pair of driving roller and driven roller linked to each other; two ends of the driving roller and the driven roller are rotatablely connected on the stander by a bearing respectively; the driving roller is connected with the eddy current machine and the anti-drag motor; and the force measurement sensor adopts a dual-range sensor. The invention provides a measurement and control method for the dynamometer used for the automobile chassis. The dynamometer for automobile chassis and the measurement and control method thereof have stable detection data, high accuracy and good reliability and can realize the compatibility of the power performance detection function and emission inspection function.

The invention discloses a breather valve positive-negative opening pressure online detecting device. The device comprises a vacuum pressure cover, a pressure stabilizing tank, an adjusting valve, a gas flow meter, a vacuum pump or an air compressor and the like. The vacuum pressure cover can directly cover the outer side or the inner side of a breather valve to be measured so as to enable the breather valve to be measured to form closed space under positive-pressure or negative-pressure condition; the adjusting valve and the gas flow meter are arranged between the vacuum pressure cover and the pressure stabilizing tank; the pressure change in the vacuum pressure cover is controlled by the adjusting valve; the gas flow meter records the leakage in pressure opening; the pressure stabilizing tank is connected with the vacuum pump or the air compressor; and the vacuum pump or the air compressor enables the pressure in the pressure stabilizing tank to reach a certain vacuum pressure value before testing. The device realizes detection of performances of the oil tank breather valve under online condition, prevents disassembly of the breather valve and adjustment of the pressure in a tank, can realize detection of positive-negative pressure opening pressure of the breather valve by single vacuum pump or air compressor, greatly improves the detecting efficiency and safety, and is simple in structure, convenient for operation method, wide in adaptation range and stable and accurate in detecting data.

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 a flexible pressure-sensitive sensor, which comprises an upper conductive electrode, a sensing medium layer and a lower conductive electrode, wherein the upper conductive electrode and the lower conductive 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 includes a polyurethane foam body and an inductive coating filled in the surface and pores of the polyurethane foam body, the inductive coating is composed by the following components: 100 parts of a silver nanowire aqueous dispersion, 3-5 parts of waterborne acrylic resin, 20-30 parts of ethyl alcohol, 0.4-0.6 part of polyvinylpyrrolidone, 0.2-0.5 part of alkylphenol polyoxyethylene ether, polyethylene glycol p-isooctyl phenyl ether, bismuth isocaprylate and toluene diisocyanate. The flexible pressure-sensitive sensor is flexible, bending-resistant and capable of sensing micro-pressure. Meanwhile, the flexible pressure-sensitive sensor has high sensitivity under high pressure, good in detection accuracy repeatability, and is also convenient for designing devices with various sensitivities and ranges.

The invention discloses a breather valve positive-negative opening pressure online detecting device. The device comprises a vacuum pressure cover, a pressure stabilizing tank, an adjusting valve, a gas flow meter, a vacuum pump or an air compressor and the like. The vacuum pressure cover can directly cover the outer side or the inner side of a breather valve to be measured so as to enable the breather valve to be measured to form closed space under positive-pressure or negative-pressure condition; the adjusting valve and the gas flow meter are arranged between the vacuum pressure cover and the pressure stabilizing tank; the pressure change in the vacuum pressure cover is controlled by the adjusting valve; the gas flow meter records the leakage in pressure opening; the pressure stabilizing tank is connected with the vacuum pump or the air compressor; and the vacuum pump or the air compressor enables the pressure in the pressure stabilizing tank to reach a certain vacuum pressure value before testing. The device realizes detection of performances of the oil tank breather valve under online condition, prevents disassembly of the breather valve and adjustment of the pressure in a tank, can realize detection of positive-negative pressure opening pressure of the breather valve by single vacuum pump or air compressor, greatly improves the detecting efficiency and safety, and is simple in structure, convenient for operation method, wide in adaptation range and stable and accurate in detecting data.

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 flexible pressure sensitive sensor. The sensor comprises an upper conductive electrode, a sensing medium layer and a lower conductive electrode. The sensing medium layer is obtained through the following steps that: a silver nanowire aqueous dispersion, waterborne acrylic resin, ethanol, polyvinylpyrrolidone, alkylphenol ethoxylate, polyethylene glycol 4-isooctyl phenyl ether, bismuth octoate and toluene diisocyanate are mixed, and an obtained mixture is subjected to ultrasonic dispersion, so that a mixed liquid can be obtained; the mixed liquid is injected into a polyurethane foam body, and the polyurethane foam body injected with the mixed liquid is immersed in the mixed liquid; the polyurethane foam body which has been subjected to the treatment of the second step is repeatedly pressed; the polyurethane foam body immersed with the mixed liquid which has been subjected to the treatment of the third step is placed in a baking oven so as to be dried. The flexible pressure sensitive sensor of the invention can be bent, is bend-resistant and can sense small pressure; the flexible pressure sensitive sensor has high sensitivity under high pressure; the flexible pressure sensitive sensor can be conveniently applied to the design of devices with various sensitivities and ranges; the comprehensive precision of the flexible pressure sensitive sensor is smallerthan 0.2% FS; and the reliability of the flexible pressure sensitive sensor is high.

The invention discloses an intelligent working seat. The working seat comprises a seat body, a power source and a control system electrically connected with the power source, armrests are arranged on the two sides of the seat body, an operating system is arranged on the armrests and electrically connected with the control system, the seat body comprises a hip supporting part and a back supporting part, a body weight monitoring and adjusting mechanism is further arranged in the hip supporting part, and the body weight monitoring and adjusting mechanism comprises a gravity sensor, a hip supporting frame and a lifting assembly located in the hip supporting frame. The back supporting part comprises a waist and back monitoring and adjusting mechanism and vibration massage mechanisms, the vibration massage mechanisms are located on the two sides of the waist and back monitoring and adjusting mechanism, and the waist and back monitoring and adjusting mechanism comprises a linear motion assembly and a sitting posture monitoring assembly. According to the working seat, the fatigue degree of workers can be effectively reduced, the physical and psychological health of the workers is ensured, and the detection precision and the data stability are improved.

The invention discloses a tensile sensor based on a flexible pressure sensitive element. The tensile sensor based on the flexible pressure sensitive element comprises an upper conductive electrode, asensing medium layer and a lower conductive electrode. The sensing medium layer is obtained by the following steps that silver nano-conductor aqueous dispersion, aqueous acrylic resin, ethanol, polyvinylpyrrolidone, alkylphenol polyoxyethylene ether, polyethylene glycol p-isooctylphenyl ether, bismuth octoate and toluene diisocyanate are mixed, and ultrasonic dispersion is carried out to obtain amixed solution; and the mixed solution is injected into ethylene-vinyl acetate copolymer foam body, and the ethylene-vinyl acetate copolymer foam body injected with the mixed solution is immersed in the foam body. The pre-treated ethylene-vinyl acetate copolymer foam body is obtained by the following steps that the ethylene-vinyl acetate copolymer foam body is immersed in pretreatment liquid and stands still, and then the ethylene-vinyl acetate copolymer foam body is put into an oven for drying to obtain pretreated the ethylene-vinyl acetate copolymer foam body. The tensile sensor based on theflexible pressure sensitive element is bendable and resistant to bending and can sense slight pressure, has high sensitivity at higher pressure, devices with various sensitivities and measuring ranges can be conveniently designed, and the comprehensive accuracy is less than 0.2 % FS.

The invention discloses a method for testing the opening degree of a breather valve. A mechanical part and a circuit acquisition part are included, the two parts are connected and matched with each other and are correspondingly arranged and operated; a displacement signal of the breather valve clack is converted into an electric signal; therefore, high-speed online real-time monitoring and acquisition of the opening degree of the breather valve under multiple working conditions and multiple mechanisms are realized; in the working process of the breather valve, by detecting the opening degree of the breather valve in real time and recording the flow in the working process of the breather valve, the gas release rate can be calculated, and therefore the gas release process can be further simulated.

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.

The invention discloses duplicate gear tooth surface angle detection equipment. The equipment comprises a detection part and an installation part. The detection part comprises a guide seat and detection mechanisms respectively located at the upper portion and the lower portion of the guide seat, installation holes for installing the detection mechanisms are formed in the upper portion and the lower portion of the guide seat, the detection mechanisms comprise pin shafts, measuring heads, sliding blocks and dial indicators, the sliding blocks are located in the installation holes and can move relative to the installation holes, the measuring heads are hinged to the sliding blocks through the pin shafts, the contact ends of the measuring heads are in contact with the tooth surface of a duplicate gear, and the probes of the dial indicators abut against the outer walls of the other ends of the measuring heads. The installation part comprises an extrusion part, liquid plastic and a positioning shaft, a liquid plastic cavity used for containing the liquid plastic is formed in the positioning shaft, and the extrusion part is adjusted to extrude the liquid plastic, so that the positioning shaft deforms and tensions the duplicate gear. The equipment is high in measurement precision.

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.

Belonging to the technical field of metal flaw detection, the invention provides a wall-climbing type bridge welding seam detection equipment, which comprises a body and a control box; the body is connected with the control box through bolts, the right side of the body is fixedly connected with a travel motor and a detection motor through bolts, and a wheel shaft is rotatably installed below the body and is in flat key connection with the travel motor. The travel motor is fixedly installed at the wheel shaft; a cylindrical linear guide rail is installed below the body in an interference fit mode, a ball screw is installed below the body, the body is rotationally connected with the ball screw, the ball screw is connected with the detection motor through a flat key, a motor protective coveris fixedly connected to the right side of the body through a bolt, and an electromagnet is embedded into the lowermost end of the body; an optical detection probe and an ultrasonic detection probe areconnected to the cylindrical linear guide rail in a sliding mode, the ball screw is screwed into the optical detection probe and the ultrasonic detection probe, the detection result is thorough and accurate, and misjudgment caused by limitation of a single detection means is greatly reduced.

The invention discloses an experiment operating platform special for food detection. The experiment operating platform special for food detection comprises a machine shell, a control circuit and a light path system; the control circuit and the light path system are arranged in the machine shell; the light path system in the machine shell adopts a halogen lamp as a light source and the light source is divided into a detection light path and a monitoring light path; the detection light path is divided into a plurality of detection branched light paths; the monitoring path is one path; the detection branched light paths lead to detection samples and are irradiated on a photocell of an A / D detection circuit board through light path condensation and according to the emergent light intensity of the detection sample; the detection light path comprises a chip U1, a resistor R1, a capacitor C1, double-way controllable silicon VS and a sensor PIR. According to the experiment operating platform special for food detection, the change of the light source intensity can be monitored in real time, stable detection data can be acquired when a power supply is unstable or within short boot time, and the troubles that an instrument needs to be checked at regular intervals and the instrument is warmed during starting-up are avoided.

The invention discloses an automatic pressure gauge. The automatic pressure gauge comprises a base, a display instrument, an object-under-test connection seat, an instrument transmission connection seat, a load bearing device and a pressure adjustment assembly; the display instrument is connected with the instrument transmission connection seat through an electric connection wire harness; the pressure adjustment assembly comprises a total adjustment valve, a first adjustment rod, a position adjustment valve, a second adjustment rod, a piston adjustment valve and a third adjustment rod; and the second adjustment rod passes through the position adjustment valve so as to be connected with the object-under-test connection seat and the instrument transmission connection seat; two ends of the first adjustment rod are connected with the instrument transmission connection seat and the piston adjustment valve respectively; two ends of the third adjustment rod are connected with the piston adjustment valve and the load bearing device respectively; and the total adjustment valve is in linkage with the middle of the first adjustment rod. The automatic pressure gauge has the advantages of reasonable design structure and convenient operation; and the accuracy of the automatic pressure gauge in a detection process can be well maintained through adjustment, and therefore, the accuracy of pressure quantity values can be better ensured.

The invention relates to a multifunctional tissue cell stereology quantitative analysis slide system. The slide system comprises a tissue section area analysis slide, a tissue cavity structure analysis slide, a target spot tissue cell structure analysis slide, a tissue cell quantitative analysis slide, and a body fluid cell quantization slide. On the basis of conventional magneification factor (40-400) of an inverted phase contrast optical microscope, stereology quantitative analysis function areas of corresponding slides are divided by linear grooves of different intervals (5mum and 10mum) or grooves with arc-shaped radius intervals of 5mum, and each groove is 1-2mum deep; on the basis of meeting the observation of a light source of the common optical microscope, when slides are observed in dark field, colourless phthalic ester composite fluorescent materials of different fluorescence color developing effects are arranged in depression areas, thereby forming a set of complete tissue cell stereology quantitative analysis slide system. The multifunctional tissue cell stereology quantitative analysis slide system can realize precise positioning of a two-dimensional plane in tissue cell qualitative process, semiquantitative process and quantitative evaluation process under the conditions of common field and dark field, as well as direct judgment on geometric parameters of tissue cells under the microscope.

The invention discloses a method for testing the opening degree of a breather valve. A mechanical part and a circuit acquisition part are included, the two parts are connected and matched with each other and are correspondingly arranged and operated; a displacement signal of the breather valve clack is converted into an electric signal; therefore, high-speed online real-time monitoring and acquisition of the opening degree of the breather valve under multiple working conditions and multiple mechanisms are realized; in the working process of the breather valve, by detecting the opening degree of the breather valve in real time and recording the flow in the working process of the breather valve, the gas release rate can be calculated, and therefore the gas release process can be further simulated.

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.