524 results about "Response sensitivity" patented technology

The invention discloses a graphene/ stannic oxide nanometer compounding resistance type film gas sensor, which takes ceramics as a basal body. The surface of the ceramic basal body is photo-etched and evaporated with multiple pairs of interdigital gold electrodes, and is coated with gas-sensitive films of graphene and stannic oxide nanometer composite, and the manufactured resistance type film gas sensor has the advantages of simple manufacturing process and low cost. The gas-sensitive film is composed of a grapheme namosheet layer in a three-dimensional nano-structure and stannic oxide crystal particle composite with an orientated growth characteristic, the introduction of the graphene can favorably reduce the resistance of sensor elements, and the formation of the three-dimensional nano-structure can obviously enhance the specific surface area of the composite, thus the absorption and the diffusion of the gas can be promoted so as to greatly enhance the room temperature gas sensitive response sensitivity of elements. The graphene/stannic oxide nanometer compounding resistance type film gas sensor has the characteristics of high response sensitivity to low concentration ammonia, fast response, favorable recovering performanc, capability of carrying out the detection at the room temperature, and the like, which can be widely applied in the agricultural and industrial production process, and the room temperature detection and control of the concentration of ammonia in the atmospheric environment.

The invention discloses a polyaniline/ titanium dioxide nanometer composite impedance type thin film gas sensor and a preparation method thereof. The gas sensor comprises a ceramic base body, an interdigital gold electrode and a gas-sensitive thin film. The gas-sensitive thin film is composed of a polyaniline/ titanium self-assembly layer and a polyaniline layer, wherein the polyaniline/ titanium self-assembly layer can greatly improve response sensitivity of the sensor to gas under room temperature, accelerates response and improves stability, and the polyaniline layer can reduce impedance of elements well. The gas sensor has high response sensitivity to ammonia gas under the room temperature, has extremely good responding performance, responds quickly, is good in stability, and can be widely applied to accurate measurement and control of ammonia gas concentration in the industrial and agricultural production process and the atmospheric environment. The invention further provides the method for preparing the gas sensor. The method is simple in process, low in cost and extremely suitable for mass production.

The invention relates to a resistance-type gas sensor based on a graphene, stannic oxide and zinc oxide composite, a preparation method and application thereof, and belongs to the technical field of gas sensors. The gas sensor is composed of a monocrystalline silicon substrate, a silicon dioxide layer, a titanium adhesion layer, interdigital platinum electrodes and a gas sensitive film covering the silicon dioxide layer and the surfaces of the interdigital platinum electrodes in sequence; the structure of the titanium adhesion layer is the same as that of the interdigital platinum electrodes, and the gas sensitive film is the graphene, stannic oxide and zinc oxide ternary composite; the ternary composite is prepared by mixing graphene, stannic oxide and zinc oxide and is of a three-dimensional porous structure. Before and after the gas sensitive film makes contact with gas to be tested, the resistance of the gas sensitive film can change, and the sensitivity of the sensor can be obtained by measuring resistance changes between the interdigital platinum electrodes. The sensor has high response sensitivity, rapid response recovery rate and good response reversibility at room temperature, and the problem that the a stannic oxide and zinc oxide gas sensor can work only at high temperature is solved.

The invention provides a pulse wave array sensor acquisition system and method. The acquisition system comprises multiple piezoelectric film sensors. The piezoelectric film sensors are PVDF film sensors arranged in an array mode and are used for converting pulse pressure signals into voltage signals. Array PVDF piezoelectric films are adopted in the acquisition system, the piezoelectric constant is large, variable force response sensitivity is high, the films are light and flexible, preparation is easy, impedance coupling with human tissue is good, mechanical quality factors are low, resistance is low, density is low, and the frequency characteristics of the pulse signals can be met. In addition, the acquisition system can guarantee that information of three positions of cun, guan and chi is completely acquired, more accurate positioning can be achieved, and artificial errors are eliminated. Gradual pressurized measurement can be conducted on wrist positions, and the problems that existing pulse sensors hardly conduct positioning and calibrate floating, centering and sinking are effectively solved. Circuits are simplified, and miniaturization of the circuits can be achieved.

An acoustic borehole logging system for generation and detection of multipole modes used to determine elastic properties of earth formations characterized as inhomogeneous anisotropic solids. The system concurrently generates and senses monopole, dipole, quadrupole and any higher order pole in the borehole/formation system in order to characterize the elastic properties and stress state of material penetrated by the borehole. Multipole modes of all orders are induced simultaneously without the need for separate transmitter and receiver systems. Performance of the logging system is not compromised due to eccentering of the axis of the tool in the borehole, tool tilt with respect to the axis of the borehole, or mismatch of response sensitivity of multiple receivers within the tool. The system comprises apparatus for generating and sensing acoustic signals in a borehole in an earth formation, and further comprises a processing method by which the sensor response signals are processed and analyzed to obtain desired formation parameters of interest.

The invention discloses a polymethyl methacryate/polyaniline nanometer fiber composite resistance membrane gas sensor and a relative preparation method. The invention uses electrostatic spinning method to prepare polymethyl methacryate (PMMA) nanometer fiber, uses solution original aggregation method to compose polyaniline (PAN) to obtain the PMMA/PANI nanometer fiber composite membrane, and covers the composite film on the an Au interdigital ceramic substrate electrode. The invention has simple preparation, low cost and batch production application, while the prepared gas sensor has wide measurement range, high response sensitivity, better linearity, better resilience and room-temperature detection on triethylamine gas. The invention has wide application for online accurate measurement of triethylamine gas density under room temperature in industrial and agricultural production and atmosphere.

The invention relates to the technical field of unmanned aerial vehicles, and discloses a tandem double-duct type flight robot and a dynamics cooperative control method thereof. The invention provides a whole dynamics modeling and cooperative control strategy of an aerial vehicle and a mechanical arm based on the tandem double-duct type flight robot and the dynamics cooperative control method thereof. In a controlling process, an acting force of the mechanical arm is not considered as disturbance on the aerial vehicle, and the mechanical arm and the aerial vehicle are not controlled respectively; a whole flight robot platform is considered as a complete dynamic system; the aerial vehicle participates in adjustment of postures of a tail end of the mechanical arm through position control; the changes of a gravity center and a joint torque of the mechanical arm are caused by motions, and a corresponding moment is generated to assist the control on the postures of the aerial vehicle. The flight robot can realize automatic hovering and environment interaction, and has the advantages of small spatial size, large effective load, high passibility and accessibility, high control response sensitivity, great improvement of system stability and robustness, and the like.

The invention relates to a carbon nanotube/poly Schiff base polymer, a preparation method thereof, and an application thereof. The invention relates to a composite material of carbon nanotube and poly Schiff base, a preparation method thereof, and an application thereof. With the polymer and the methods provided by the invention, problems of existing poly Schiff base of low photoelectrochromic response sensitivity and poor thermal stability are solved. According to the invention, aminated carbon nanotubes, aromatic diamine monomers, and dialdehyde compounds are subject to an in situ polymerization reaction, such that the product is obtained. First, aminated carbon nanotubes and part of dialdehyde compounds are mixed and heated until reflux liquid is generated; then aromatic diamine monomers and rest dialdehyde compounds are mixed and injected in batches, and the reaction is continued, such that the product is obtained. The polymer provided by the invention provides electrochromic, acidichromic, and photochromic performances, and has good thermal stability. Therefore, the polymer can be used in displays and acid-base sensors. The polymer has high electrochromic, acidichromic, and photochromic sensitivity, and provides reversible acidichromic and photochromic performances.

The invention discloses a polypyrrole/polyvinylidene fluoride nano fiber composite resistance type film gas-sensitive element and a manufacturing method thereof. The method comprises the following steps of: depositing polyvinylidene fluoride nano fiber on a ceramic matrix electrode with golden interdigital by adopting an electrostatic spinning method, and then compounding polyaniline on the polyvinylidene fluoride nano fiber by gas phase in-situ polymerization to obtain a polypyrrole/polyvinylidene fluoride nano fiber composite gas-sensitive film. The preparation process is simple, has low cost, and is particularly suitable for batch production. The prepared gas-sensitive element has the advantages of high response sensitivity on ammonia gas at room temperature, good linearity and the like, has good response repeatability on high-concentration ammonia gas, and can be widely applied to room temperature on-line detection of ammonia gas concentration in an industrial and agricultural production process and an atmospheric environment.

The present invention relates to the field of olefin polymerization, and particularly provides a catalyst component for olefin polymerization, and a preparation method thereof, and a catalyst for olefin polymerization, and applications thereof. The catalyst component for olefin polymerization contains the product obtained by carrying out a reaction on a solid component, at least a titanium compound and an internal electron donor, wherein the internal electron donor contains a phosphate compound and a diether compound, the phosphorus content (calculated as the phosphorus element) in the catalyst component is not more than 0.06 wt% by using the total weight of the catalyst component as the reference, and the solid component contains a magnesium compound represented by a formula (1) and an alkylene oxide compound represented by a formula (2). According to the present invention, the catalyst component does not contain phthalate compounds (plasticizers), has high hydrogen response sensitivity and high stereospecificity, and can be used in olefin polymerization so as to obtain the polymer having narrow molecular weight distribution. The formulas (1) and (2) are defined in the specification.

An implantable cardiac stimulation system capable of automatic capture verification is provided with an associated method for performing automatic testing functions using programmable, or automatically determined, AV delays. Automatic threshold testing and evoked response sensitivity testing performed at a user-specified AV delay setting, rather than a preset setting, allows assessment of automatic capture verification based on an AV delay relevant to daily system function. Further features of the present invention are an adjustable frequency with which automatic threshold tests are performed and an adjustable frequency with which threshold test results are stored in memory in a threshold record for better monitoring of lead stability or impending clinical problems. The frequency of performing threshold tests and the frequency of storing threshold test results may be varied according to the threshold stability. Stored threshold test results are advantageously displayed with respect to a fixed or variable time scale.

The invention provides a miniaturized integration induction type on-line monitoring sensor for slide oil grains, and exciting coils and an induction coil are integrated through micro processing and manufacturing. The sensor consists of three planar coils in a stacking manner, wherein one induction coil is located in the middle, and two exciting coils are symmetrically arranged on two sides and connected at inner-circle ends through a through-hole lead. Besides, the three coils are centrally aligned and share a common hollow round hole to allow a pipeline for circulating the slide oil to penetrate. With the adoption of the design, the planar coils are integrated, so that the effects of highly-dense configuration and accurate symmetry of the exciting coils are achieved, and the improvement of response sensitivity of the sensor is facilitated.

The invention discloses a gear-rack displacement multiplication type drill string heave compensator for a floating drilling platform, which comprises a traveling block (1), a large hook (2), a gear-rack mechanism (4), a rigid rod (3) and a compensating cylinder system. The compensating cylinder system comprises a piston-type hydraulic cylinder (5) and a gas/liquid storage tank (6), the hydraulic cylinder (5) is fixedly connected onto the traveling block (1), the large hook (2) is connected with the traveling block (1) through a steel wire rope (7), the rigid rod (3) is arranged on the traveling block (1) and connected with the a piston rod through the gear-rack mechanism (4), and a gear shaft for a gear in the gear-rack mechanism (4) is connected with a variable frequency motor. The gear-rack displacement multiplication type drill string heave compensator has the advantages that a driving compensating system and a driven compensating system are adopted to simultaneously achieve response sensitivity, rapidness and precision of compensation of the driving system and low energy consumption and the like of the driven system, the compensator is simple in structure and fine in compensating effect, and adaptability and reliability of the compensator are enhanced.

The invention discloses a fire light-temperature composite intelligent monitoring warning device for highrise building, comprising a fire signal detector, a signal transmission device, a central processing unit, a data manager, a fire alarming controller and a warning device, wherein, one end of the data manager is connected with the fire alarming controller through a first analog-to-digital converter (ADC), while the other end is connected with the central processing unit through the signal transmission device; the central processing unit is also connected with the fire alarming controller which is connected with the warning device through a second digital-to-analog converter (DAC); the fire signal detector comprises a fire temperature detector and a fire luminosity detector which are respectively connected with the first ADC. The invention which adopts light-temperature composite fire detecting technology combines the characters of accurate measurement of heat detector and quick response of photodetector; moreover, the invention can solve the problems such as failure alarm and false alarm of a fire to a large extent and also can improve the response sensitivity of the detector.

The invention discloses a three-dimensional sub-wavelength metal cavity structure spectrum multi-tape light perfect absorption plasmon sensor as well as a preparation method and application thereof. The sensor is composed of a flat seamless metal film, a two-dimensional metal slit micro-cavity array and a medium film in sequence from bottom to top, wherein the thickness of the metal film layer is more than 100 nanometers so that light transmission is inhibited; and the size and shape of a cross-shaped metal block and the period of the two-dimensional metal slit micro-cavity array composed of the cross-shaped metal block can be adjusted. The preparation process is simple and developed and the performances of the sensor present multi-spectrum tape narrow line-width responses; meanwhile, the sensor has high-response sensitivity for spectrum frequency shift and spectrum intensity change, and good tunability of space selective sensing detection and a detection spectrum range; and the geometric dimension of the device structure is in a sub-wavelength range and devices are easy to integrate.

The invention discloses a preparation method of a polyamide and graphene oxide combined photoelectric material, which relate to the field of preparation methods of photoelectric materials, and mainly aim at solving the problems that a polyamide photoelectric material prepared by a conventional method is poor in thermal stability, poor in conductivity and low in electrochromism response sensitivity. The polyamide and graphene oxide combined photoelectric material is prepared from acylating chlorination graphene oxide, diamine, diacid, calcium chloride, pyridine and triphenyl phosphate. The preparation method comprises the following steps of: firstly, preparing the acylating chlorination graphene oxide; secondly, preparing a primary product of the polyamide and graphene oxide combined photoelectric material; and thirdly, purifying and drying the primary product. The polyamide and graphene oxide combined photoelectric material has the advantages that electrochemical oxidation reduction reversibility is high, the response to color change in electrochromism is rapid, the color change sensitivity is high, and the state after the color change can be stably maintained for half a year. The polyamide and graphene oxide combined photoelectric material is applicable to the photoelectric field.

The invention relates to algorithms for detecting feeder line radio-frequency power and antenna standing-wave ratio in a mobile communication system through RFID. A feeder line radio-frequency power algorithm comprises that: for a certain radio-frequency power tag R, the response sensitivity is a constant Pref, and the output power of full power of a reader can be detected through the output power of the reader; and an antenna standing-wave ratio algorithm comprises that: for a certain standing-wave ratio tag V, when an antenna is normal, the reflected energy of the antenna is insufficient toexcite the tag, the tag V cannot be stored in a reader disc, and the reader sets a reasonable value for the standing-wave ratio of the tag V for representing a normal state of the standing-wave ratio. The calculation methods for the feeder line radio-frequency power and the antenna standing-wave ratio can effectively monitor the antenna and the feeder line in the mobile communication system so asnot to monitor the system through wired connection without additional cable. The engineering difficulty can be reduced, and the cost of network lines and twisted pairs in the mobile communication system is saved.

The invention provides a misfit-layered cobalt oxide pyroelectric thin-film photodetector, belongs to the technical field of thin-film photodetector equipment, and solves the technical problem of providing the photodetector which is manufactured by growing a layer of c-axially oriented misfit-layered cobalt oxide pyroelectric thin-film on a beveled oxide monocrystal substrate. The photodetector comprises a technical scheme that the photodetector consists of the beveled oxide monocrystal substrate and the c-axially oriented misfit-layered cobalt oxide pyroelectric thin-film, wherein the c-axially oriented misfit-layered cobalt oxide pyroelectric thin-film grows on the beveled oxide monocrystal substrate by adopting pulsed laser deposition technology or metal organic deposition technology; the thin-film surface is provided with two electrodes which are deposited on the thin-film surface by using thermal evaporation, magnetron sputtering or pulsed laser deposition technology; and the two electrodes are connected with an output end of a voltage signal through electrode lead wires respectively. The misfit-layered cobalt oxide pyroelectric thin-film photodetector provided by the invention has the advantages of simple preparation, low cost, wide response wave band, high response sensitivity and quick response.

The invention relates to the application of a screen printing electrode in the determination of 5-hydroxytryptamine. The invention has higher sensitivity and low cost by using the screen printing electrode for determining 5-hydroxytryptamine. The screen printing electrode comprises an electrode substrate which is printed with a carbon electrode, a counter electrode and an Ag/AgCI electrode; each electrode is correspondingly connected with an electrode lead wire. Carbon printing ink manufacturing the carbon electrode can contain aerosol granules so as to increase the response sensitivity of electroactive material.

The invention discloses a point-shaped light scattering type smoke detector without an optical labyrinth, and a signal processing method. The point-shaped light scattering type smoke detector without the optical labyrinth comprises a photoelectric smoke detection part, a detection chamber (C), a filter screen (I), a signal processing unit (E), a housing (F), an alarm horn (G) and an indication lamp (H). According to the novel idea of the point-shaped light scattering type smoke detector without the optical labyrinth disclosed by the invention, the obstructions of smoke grains entering and exiting the detector are reduced, thus the flowing of smoke entering and exiting the chamber is smooth, and high response sensitivity and real-time performance are achieved. The function of the optical labyrinth structure is preventing an external environment light from entering the detection chamber, for this, the invention discloses a analysis and processing method for a signal containing functions of an environment light, a smoke and the like by virtue of an amplitude modulation and demodulation principle, provides an theoretical basis for the point-shaped light scattering type smoke detector without the labyrinth, and also provides a novel thought and research direction for research on improvement for the response sensitivity of the detector.

The invention belongs to the technical field of automation engineering and relates to an electromagnetic driving two-degrees of freedom spherical robot wrist and a control method thereof. The electromagnetic driving two-degrees of freedom spherical robot wrist is a high-integration driving spherical wrist device, the two output ends of an internal universal joint and an external universal joint passing through the same rotating center are coaxially connected, and a radial magnetizing permanent magnet in a servo mechanism is directly driven by a coaxial servo magnetic moment in a space universal rotary magnetic field to realize side-sway and pitching two-degrees of freedom rotation. The electromagnetic driving two-degrees of freedom spherical robot wrist overcomes the defects of a complicated driving machinery wrist, the wrist driving system is simple and light in structure, high in transmission efficiency, static and dynamic performance and control and response speed, can solve the modeling problem of the existing spherical electromagnetic driving joint three-dimensional complicated magnetic field, realize precise modeling of the spherical electromagnetic driving joint magnetic field and precise decoupling of electromagnetic coupling and mechanical coupling, and remarkably improves the response sensitivity and positioning precision of electromagnetic driving spherical joint control.

In an antenna and a semiconductor device including the antenna, an object is to reduce the distance between electrodes of a capacitor as much as possible, reduce the area of the electrode of the capacitor as much as possible, and prevent the suppression of response sensitivity and a response range of the semiconductor device. The present invention relates to an antenna including an antenna coil provided over a first region of a base and a capacitor which uses a second region of the base as a dielectric body and which has electrodes provided for opposite planes of the second region of the base, wherein the second region of the base is thinner than the first region of the base, and also relates to a semiconductor device including the antenna.

The invention discloses a webmaster managed network simulation system and a webmaster managed network simulation method. The system is operated on a single PC computer. The webmaster managed network simulation system can be used for modeling network elements, the instantiation of the network elements can be realized by virtue of a human-computer interaction graphic interface, the network topological layout is carried out, corresponding network parameters are calculated and generated according to the network topological layout, and the network parameters are correlated to the real simulation topology; the network parameters are automatically mapped into a management information database of a single device to be managed and monitored by a webmaster. The webmaster managed network simulation system and the webmaster managed network simulation method have beneficial effects that the network topology can be manually adjusted in real time or can be automatically adjusted by virtue of a script algorithm, so that the response sensitivity of a webmaster system for the variation of the network topology can be tested. By utilizing the simulation system, a large-scale complicated network topology can be simulated, the network topology can be flexibly planned, the development efficiency of the webmaster system can be greatly improved, the functional stability of the webmaster can be improved, the performance of the webmaster system can be improved, and the test and training flow can be simplified.

The invention provides a preparation method of a gold nanoparticle-graphene-melamine sponge composite material. The method mainly comprises the following process steps: 1, preparing a graphene oxide solution by using an improved Hummers method; 2, soaking a piece of melamine sponge, which is cleaned and has a certain size, into mixed liquid of chloroauric acid and graphene oxide, taking out the soaked melamine sponge, and drying; 3, reducing the chloroauric acid and the graphene oxide at the same time by using ascorbic acid, and preparing the recyclable gold nanoparticle-graphene-melamine sponge composite material. The method realizes one-step reduction of the chloroauric acid and the graphene oxide, and has the advantages of simple process, good repeatability, environment friendliness andstable composite product; the prepared gold nanoparticles and graphene sheets are evenly distributed on a framework of the melamine sponge, and an obvious agglomeration phenomenon does not occur. Thegold nanoparticle-graphene-melamine sponge composite material can be repeatedly used in a recycling way as a catalyst for degrading industrial pollutants, can be also used as an electrode material for electrochemical sensors, can be used for detecting the existence of low-concentration H2O2 for a plurality of times, and achieves the aims of increasing response sensitivity and reducing a detectionlimit.

The present invention relates to the field of olefin polymerization, and particularly provides a catalyst component for olefin polymerization, and a preparation method thereof, and a catalyst for olefin polymerization, and applications thereof. The catalyst component for olefin polymerization contains the product obtained by carrying out a reaction on a magnesium source, a titanium source and an internal electron donor, wherein the internal electron donor contains a phosphate compound and a diether compound, and by using the total weight of the catalyst component as the reference, the phosphorus content (calculated as the phosphorus element) in the catalyst component is not more than 0.06 wt%. According to the present invention, the catalyst component does not contain phthalate compounds (plasticizers), has high hydrogen response sensitivity and high stereospecificity, and can be used in olefin polymerization so as to obtain the polymer having narrow molecular weight distribution.

The invention discloses a passive sensor device for measuring shock wave energy based on a combined aluminum honeycomb, which consists of a packaging shell, a driving slide block, a combined aluminumhoneycomb energy absorbing element, a fixed wall stop plate, a moving bolt and a sealing baffle ring. And the driving slide block moves in the packaging shell under the action of the shock wave to compress the combined aluminum honeycomb energy absorbing element, and the combined aluminum honeycomb energy absorbing element generates plastic unrecoverable deformation. The shock wave energy acting on the driving slide block can be obtained by measuring the plastic deformation displacement on the combined aluminum honeycomb energy absorbing element caused by the driving slide block and utilizingthe relationship between the plastic deformation displacement and the absorbed energy. The combined aluminum honeycomb energy absorbing element has the advantages of simple structure, no need of powersupply, convenient arrangement and use, low cost and reusability, and the response sensitivity of the combined aluminum honeycomb energy absorbing element to lower shock waves is high, so that the technical problem that the shock wave energy is difficult to quantitatively test under partial severe environments can be solved.

The invention relates to a coating failure monitoring probe and a rapid field coating failure monitoring method. The coating failure monitoring probe comprises a probe cavity, a probe inner core, a base plate and an outer guide line, wherein the probe inner core is located in the probe cavity, and the base plate is located at the bottom of the lower end of the probe cavity; the upper end of the probe cavity is provided with an opening; the probe inner core is composed of a working electrode, a reference electrode and an auxiliary electrode; the working electrode, the reference electrode and the auxiliary electrode are arranged on the base plate and are arranged at intervals; an insulating sealing layer is arranged between every two adjacent electrodes; and the top ends of the three electrodes form a working surface at the opening in the upper end of the cavity. The monitoring probe has the advantages of being simple in structure, high in response sensitivity, long in service life and high in reliability. The rapid field coating failure monitoring sensor has the advantages that an electrochemical impedance principle is adopted, the coating failure monitoring probe is combined with an alternating-current impedance tester, the detecting parameters are various, the response sensitivity is high, and therefore the aging state and the aging speed of coating in the service can be monitored in real time.