1513results about How to "Sensitive" patented technology

The invention relates to a multiturn absolute rotary encoder based on a rotary transformer, which is characterized in that: a sensor is displaced by taking the rotary transformer as a shaft angle; a shaft angle decoding circuit can be formed by adopting DSP as a core processor; a sine wave which can be controlled by frequency and phase in the method that the circuit is synthesized by direct digital frequency for the numerical control of an oscillator; and the sine wave is directly taken as an excitation rotary transformer signal via a power amplifier and a filter circuit; the rotary transformer signal is transferred to A / D converter after being run through a matching circuit of electronic transformer; after sampling, digital filtering and digital signal processing, the sine and cosine value for the actual angle of two channels is generated; the angle error change is tracked dynamically by the PI algorithm; the mechanical displacement of the rotating object is converted into digital shaft angle position and speed. The multiturn absolute rotary encoder based on a rotary transformer has the advantages of high tracking speed, high conversion accuracy, high reliability, simple structure, sensitive movement, low environmental condition, strong anti-interference capability, high measuring accuracy and speed voltage output.

The invention discloses a humidity detection device for an electric pressure cooker and a use method. The device comprises a cooker body and a top cover which covers the cooker body, wherein a base isarranged on the bottom of the cooker body, a heating plate is arranged on the bottom of the inside of the cooker body, a temperature sensor is arranged on the top of the heating plate, a heat conduction layer is arranged inside the cooker body, a clamping bulge is arranged at the top of the heat conduction layer, a liner is arranged inside the heat conduction layer, a sealing ring is arranged between the cooker body and the top cover, handles are arranged on the outer sides of the top of the cooker body, a controller is arranged on one side of the outer side of the cooker body, a water collecting box is arranged at the other side of the outer side of the cooker body, a hand shank is arranged at the top of the top cover, and a humidity digital meter is arranged on one side of the hand shank. The humidity detection device and the use method have the beneficial effects that 1, a humidity detector is used for detecting the humidity in the electric pressure cooker, so that the dry-burningcondition of the electric pressure cooker can be prevented; and 2, a humidity sensor made of the material such as ceramic is used, so that the sensing is sensitive, and the device can continuously work under the high-temperature and high-humidity environments.

The invention discloses a children cognitive system based on augment reality technology and a cognitive method. The children cognitive system based on the augment reality technology comprises an image information input module, an image information matching module, a drawing model module and a voice recognition module. A set of recognition identifications are developed through interfaces of an ARToolkit augment reality development kit, a Microsoft Speech SDK voice recognition engine, a 3D max modeling tool and the like, and a children cognitive platform performs simple interaction with a virtual scene in a computer through voice recognition. Operations like moving, amplifying and contracting a model are achieved through OpenGL image processing technology and 3D modeling technology. The children cognitive system based on augment reality technology and the cognitive method have the advantages of being short in development cycle, good in maintenance, good in portability and easy to modify. In addition, a user can use the cognitive system based on augment reality technology and the cognitive method to write a literary handbook, good learning effect is achieved, and the cognitive platform which is strong in interaction is provided for a child to use an augment reality application system.

The invention relates to the technical field of satellite fault diagnosis and fault-tolerant control, and proposes a fault diagnosis method, which has very good robustness to external interference, isfree of influence of external interference in a fault diagnosis process, prevents generation of misinformation and missing report, and can effectively estimate fault severity. According to the satellite fault diagnosis and fault-tolerant control method based on a self-adaptive observer, first a satellite kinematics and dynamics model under an actuator fault and external interference influence isestablished to analyze influence of fault effective factors on a system; secondly, an observer is designed for a satellite fault system, a residual error evaluation function is established based on observer output and system actual output, an evaluation threshold value is obtained, and the purpose of fault detection is achieved; then, when occurrence of a fault is detected, a self-adaptive observer is designed to complete a fault diagnosis task; and finally, based on an estimated value of the fault, a finite time self-adaptive fault-tolerant controller is designed. The satellite fault diagnosis and fault-tolerant control method based on a self-adaptive observer is mainly applied to fault diagnosis and fault-tolerant control occasions.

A closed hydraulic control system with frequency-varying volumetric speed regulation for high-power and high-speed fields is composed of primary hydraulic loop and oil-supplementing loop for said primary hydraulic loop. A frequency-varying technique is used to control the rotation speed of three-phase AC asynchronous motor and in-turn the output flow of hydraulic pump or hydraulic motor. Its advantages are small volume of oil in hydraulic loop, and high energy-saving effect.

The invention discloses a control system of a telescopic boom bolt mechanism, which comprises an oil tank, a hydraulic pump, a motor and a second directional control valve which are arranged on a telescopic boom, wherein the oil tank is used for storing hydraulic oil; the hydraulic pump is used for outputting the hydraulic oil in the oil tank into a hydraulic circuit; the motor is used for driving the hydraulic pump; and the second directional control valve is used for controlling the route between the hydraulic circuit and the hydraulic pump or the oil tank to be turned on. Preferably, the control system also comprises a third one-way valve, an energy accumulator and a pressure relay; when a pressure value detected by the pressure relay is more than a preset maximum pressure value, the pressure relay outputs control signals to the motor, and the motor is switched off; and when a pressure value detected by the pressure relay is less than the maximum pressure value, the pressure relay outputs control signals to the motor, and motor is switched on. The system has simple and reasonable design, and can effectively avoid the problem that hydraulic volume in a large chamber influences the control response speed, so as to ensure the sensitive and reliable motions of an arm pin hydro cylinder and a cylinder pin hydro cylinder.

The invention discloses an automatic conveying device for sheets. The device comprises a fixed frame, a conveying mechanism, a positioning processing platform and an automatic lift positioning workbench, wherein the conveying mechanism is arranged above the automatic lift positioning workbench through the fixed frame; the positioning processing platform is positioned in the front of the conveying mechanism; the conveying device comprises a guiding sliding rail which can move longitudinally and transversely, a front cylinder sucker, a middle cylinder support plate, a rear cylinder sucker, a front push cylinder push plate, a feed roller driven by a drive motor and a sheet sliding rail support; the front cylinder sucker, the middle cylinder support plate, the rear cylinder sucker and the front push cylinder push plate are arranged on the guiding sliding rail; the front push cylinder push plate is positioned at the rear side of the middle cylinder support plate; the feed roller is positioned in the front of the guiding sliding rail; the sheet sliding rail support is positioned in the front of the feed roller; and the positioning processing platform is positioned below the sheet sliding rail support. The device has the advantages of high working efficiency, low labor intensity and safety in operation.

The invention discloses a stripping device for an integrated circuit (IC) chip. The device comprises a mounting plate, a position regulation mechanism, a sliding table mechanism, an ejector pin mechanism and a vacuum generator. The ejector pin mechanism comprises a sleeve, a linear motor, a linear transmission mechanism, a force sensor, an ejector pin seat, an ejector pin clamping piece and an ejector pin, wherein the sleeve is arranged on a sliding table; the linear motor is arranged in the sleeve, and the control end of the linear motor is connected with the output end of an external control center; the linear transmission mechanism is arranged in the sleeve, and the lower end of the linear transmission mechanism is connected with an output shaft of the linear motor; the force sensor is arranged between the output shaft of the linear motor and the linear transmission mechanism, and the signal output end of the force sensor is connected with the input end of the external control center; the ejector pin seat is arranged at the top of the sleeve; an air hole is formed in the surface of the ejector pin seat; the ejector pin seat is connected with an air tube of the vacuum generator through the air hole; the ejector pin clamping piece is arranged in the ejector pin seat, and is connected with the upper end of the linear transmission mechanism; and the ejector pin is clamped through the ejector pin clamping piece. A closed loop force control scheme is adopted, and the chip is stripped on the premise of no damage to the chip, so that the device has the characteristics of safety, high efficiency and high stripping reliability.

Provided is a high-precision intelligent writing robot. The high-precision intelligent writing robot comprises a base provided with a writing area, a control module, a Y-axis motion system, an X-axis motion system and a writing module, the control module, the Y-axis motion system, the X-axis motion system and the writing module are arranged on the base, and the Y-axis motion system and the X-axis motion system can drive the writing module to move in the writing area; the robot is characterized in that the writing module comprises a connecting plate fixed with a linear sliding block, a pen rising and falling device is installed on the connecting plate, a pen clamping rack clamping a penholder is arranged at the front end of the pen rising and falling device which can drive the pen clamping rack to move downwards or rise, and therefore pen falling or pen rising operation is completed; after a pen falls, the Y-axis motion system and the X-axis motion system are driven to write coherent lines or strokes. According to the high-precision intelligent writing robot, by means of terminals such as mobile phones and computers, the control module can be remotely controlled, the Y-axis motion system, the X-axis motion system and the writing module can be driven, and the robot can replace people to write or draw. The high-precision intelligent writing robot has the advantages of being compact in structure, reliable in performance, sensitive in action, high in motion displacement precision, long in service life and the like, and the high-precision intelligent writing robot is suitable for places of work high in repeatability.

A miniature robot simulating gecko is composed of a circuit control unit and a mechanical structure unit which consists of 4 single leg structures comprising thigh, shank and suction cup, a body module comprising two waist-driving steering gears, two air pumps, two air releasing unit, two four-way jointers and 6 plastic guide tubes, and a negative-pressure sucking and releasing unit comprising steering gear, spring, steel cable, winder and fixed spring.

The invention belongs to the technical field of touch screens, and provides a mutual capacitance touch screen and a touch sensing method thereof. Firstly, a control unit is used for identifying the types of touch objects; and secondly, the control unit is used for controlling on and off of a corresponding first switch and a corresponding second switch, the widths and the spacing of sensing passages of receiving electrodes are dynamically adjusted, the widths and the spacing of the sensing passages can be increased for large touch objects such as a finger and can be decreased for small touch objects such as a touch pen, accordingly, input of various touch objects can be accurately detected, the number of the sensing passages can be reduced when the touch objects are large, overall scanning time is shortened, system resources are saved, reporting speed is increased, system response is further more sensitive, and user experience is excellent.

The invention relates to a Schiff base compound and a method for detecting an aniline compound thereof, belonging to the technical field of chemical sensor materials. The Schiff base compound is characterized by being prepared in such a way that an aromatic aldehyde compound with ortho-position hydroxyl reacts with monoamine or polyamine and has the structural formula shown as the figure, wherein n1 is an integer from 1 to 100, and n2 is an integer from 1 to 6; R is an aliphatic hydrocarbon substituted group, an aryl substituted group, heteroatom-substituted aliphatic alkyl or heteroatom-substituted aryl alkyl; and R1 and R2 are electron-withdrawing groups or electron-donating groups. The compound has stable solid fluorescence luminous performance, the fluorescence strength of the compound is changed by the aniline compound, the aniline compound can be detected according to the change of the fluorescence strength of the compound, and the compound is a novel fluorescence sensing material for detecting aniline.

The invention discloses an optical image capture system, an image capture device and an electronic device. The optical image capture system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence from an object side to an image side. The first lens has negative refractive power, and the image-side surface is concave near the optical axis. The second lens has refractive power. The third lens has refractive power. The fourth lens has refractive power. The fifth lens has refractive power. The sixth lens has refractive power, the image-side surface is concave near the optical axis and contains at least one convex surface away from the optical axis, and both the object-side surface and the image-side surface are aspheric surfaces. The seventh lens has refractive power, the image-side surface is concave near the optical axis and contains at least one convex surface away from the optical axis, and both the object-side surface and the image-side surface are aspheric surfaces. When certain conditions are met, aberration is avoided. The invention further discloses an image capture device comprising the optical image capture system and an electronic device comprising the image capture device.

The invention discloses a video communication system combining virtual reality glasses, and the video communication system can be beneficial to long-distance participants to obtain participating experiences of perceptibility, sense of immediacy and immersion. The video communication system comprises a video communication server which is interconnected to an IP (internal protocol) network, a field participating personification communication terminal and a long-distance participating portable communication terminal, wherein virtual reality glasses are connected or integrated on the long-distance participating portable communication terminal. By virtue of the virtual reality glasses, long-distance participants can obtain participating experiences of perceptibility, sense of immediacy and immersion.

The invention provides an ELISA (Enzyme Linked Immunosorbent Assay) kit for detecting a porcine epidemic diarrhea virus antibody, belonging to the technical field of biology. The kit is an ELISA plate stripe using purified recombinant porcine epidemic diarrhea virus N protein as an envelope antigen. RT-PCR (Reverse Transcription-Polymerase Chain Reaction) amplification is adopted for obtaining a porcine epidemic diarrhea virus N gene, the gene is directionally inserted into a pET-28a carrier to construct pET-28a-N recombinant plasmids, BL21 (DE3) competent cells is transformed, and finally a prokaryotic expression fungus pET-28a-N / BL21 is obtained. The prokaryotic expression fungus pET-28a-N / BL21 is subjected to induced expression and purification through IPTG (Isopropyl Thiogalactoside) to obtain recombinant N protein. The kit is used for detecting the porcine epidemic diarrhea virus antibody. By testing, the kit has good specificity, sensibility and repeatability. The kit is accurate in detection, easy and convenient to operate and suitable for promotion in clinical application and provides a reliable means for rapid detection of porcine epidemic diarrhea.

The invention discloses double-antibody sandwich ELISA (enzyme linked immunosorbent assay) kit used for detecting an avian leukosis group specific antigen. The kit comprises an enzyme plate coated by a monoclonal antibody which is secreted by a hybridoma cell strain the preservation serial number of which is CGMCC (china general microbiological culture collection center) No.5961. The invention also discloses a double-antibody sandwich ELISA method which is established by utilizing the monoclonal antibody and is capable of rapidly and effectively detecting an ALV (avian leukosis virus). In the double-antibody sandwich ELISA method, the monoclonal antibody prepared by pronucleus expressive HLJ09mdj-1p27 albumen is utilized as a peridium antibody, and antibodies prepared by p27 are utilized as a detection antibody. According to the invention, the minimum detection amount of the p27 is 1.25 ng / ml, the method is not reacted with the common virus of birds, and the specificity is good. The method is utilized to detect egg white and an anus swab sample, and the coincidence rate is respectively 96.5% and 88.9% compared with a PCR (polymerase chain reaction) method; and the result proves that the method has the advantages of convenience, celerity, differentia, sensitivity and the like, and is useful for the detection and population purification of the ALV.

The invention provides a full-automatic integration machine of capping, cap-removing and tank-reversing feeding, which comprises a base and is characterized in that a rotating stage is arranged at the base and provided with a lifting frame that is provided with a clamping and embracing turnover device and a tank cover taking and placing device. Only a device is used for conveniently and rapidly realizing the full-automatic processes of cap taking, clamping and embracing, displacing, turnover unloading, displacing and cap adding, and the whole machine has high automation degree, sensitive and accurate action, compact structure, flexile and convenient control and small occupied space, and the disposed cigarette treatment can be carried out once for all without disposed cigarette detection, and the charging efficiency is high, simultaneously, a cigarette tank finishes the turnover feeding in a clamping and embracing manner, so the cigarette tank can be designed to be a structure with light weight and small size, thus reducing the total bearing load of elevated stereo storehouses, reducing the total height, increasing the safety of the elevated stereo storehouses as well as saving the cost of construction.

The invention provides a welding wire matched with a corrosion-resistant aluminum-magnesium-scandium alloy and a preparation method thereof. The welding wire comprises the following components: 3.0-5.0wt% of Mg, 0.1-0.2wt% of Zr, 0.1-0.2wt% of Sc, 0.2-0.3wt% of Mn, 0.05-0.15wt% of Ti, 0.05-0.25wt% of Cr, 0.01-0.05wt% of Ce, 0.01-0.05wt% of Y and the balance of Al. The preparation method of the welding wire matched with the corrosion-resistant aluminum-magnesium-scandium alloy comprises the following steps: (1) preparing an aluminum-based master alloy; (2) preparing alloy raw materials; (3) refining the alloy; (4) measuring hydrogen content; (5) ingot casting; and (6) extruding and drawing for molding. The invention meets the need for welding production of an aircraft fuel tank and a rocket tank, and welding seams can obtain higher comprehensive mechanical property of joints.

The invention provides a leakage monitoring and positioning early-warning system in petrochemical industry and an establishment method thereof, relating to a device for prevention, inspection and position determination of gas leakage. The system comprises a host computer system, a central node, a routing node and a terminal node, wherein the software part in the host computer system comprises a geographic information system and a virtual reality control system; all the nodes are wireless network nodes comprising a ZigBee wireless module, a sensor module and a power supply module; and the ZigBee wireless module adopts a ZigBee wireless transport protocol, the sensor module carries a small leakage gas-sensitive transducer, and the power supply module is composed of a direct current cell of 3.6 V and a voltage conversion circuit. The invention achieves the synchronization of environment parameters of all monitoring points, early-warning information of potential accidents and correct positioning information of dangerous sources when an accident occurs in a monitoring center and the whole site, and the invention solves the problems that sudden leakage events can not be monitored and early-warned in time and the site information can not be acquired and transmitted in time in the prior art.

The invention discloses a capacitor touch key system, which comprises a key panel, a vertical electrode and a sensor component, wherein the key panel comprises a touch key made of metal; a gap and an included angle are formed between the vertical electrode and the touch key; and the sensor component is used for detecting capacitance change between the touch key and the vertical electrode. The capacitance change caused by distance change of plates in an edge electric field effect capacitor formed by the metal touch key and the sheetmetal vertical electrode is more sensitive than a general parallel plate capacitor, so the capacitance change is more easily sensed by the sensor component and inputted as a key action signal to realize more sensitive sense than the touch key of the general parallel plate capacitor. A zero pressure touch key structure is realized based on the key system formed by the edge electric field effect capacitor and user experiences are improved.

The invention provides a biosensor based on a tunneling field effect transistor and a preparation method of the biosensor. The preparation method of the biosensor at least comprises the steps of firstly, preparing a tunneling field effect transistor as a converter; and then carrying out activated modification on the surface of a channel in the tunneling field effect transistor by adopting a surface modification agent, wherein the step of preparing the tunneling field effect transistor specifically comprises the procedures of providing an SOI (Silicon On Insulator) substrate, wherein the SOI substrate comprises a top layer silicon, a buried oxygen layer and a bottom layer silicon; forming a gate dielectric layer on the surface of the top layer silicon; carrying out ion injection on the top layer silicon at two sides of the gate dielectric layer by adopting an ion injection process to form a source electrode and a leak electrode, defining the top layer silicon of the gate dielectric layer, which is not subjected to the ion injection, as a channel; and forming a back gate on the surface of the bottom layer silicon. The tunneling field effect transistor provided by the invention is abrupt in sub-threshold slope, and is sensitive in change of charges on the surface of the channel, thereby enabling the biosensor to be capable of detecting a biomolecule at high sensitivity.

The invention discloses a preparation method of a self-supporting multiferroics composite film. According to the method, a plating platinum silicon chip comprising a silicon chip layer, an interface layer and a nano-scale thickness platinum thin layer is adopted, the plating platinum silicon chip is put into a hydrofluoric acid solution to make the interface layer of the plating platinum silicon chip react with the hydrofluoric acid to be etched, the platinum film disengages from the silicon chip and floats on the solution surface, the platinum film is transferred into a vessel filled with deionized water for washing, the platinum film is flatly paved on a substrate prepared by an exotic material and is dried and a ferroelectric layer film and a ferromagnetic layer film are deposited in order on the platinum film. Compared to the prior art, the preparation method of the invention is characterized by low cost, mild preparation condition and simple and controllable technology. Besides, the self-supporting multiferroics composite film obtained is more sensitive to extraneous stimulations because the film is free from the influence of a substrate fettering force and the magnetic electric coupling coefficient of the multiferroics composite film can be raised.

The invention discloses a FA<0.85>Cs<0.15>PbI<3> membrane-based broadband superspeed photodetector and a preparation method thereof. A FA<0.85>Cs<0.15>PbI<3> membrane is arranged on the upper surface of insulating glass, and a pair of gold membrane electrode in ohmic contact with the membrane is arranged on the FA<0.85>Cs<0.15>PbI<3> membrane. Due to use of the characteristic of a large specific surface area of the FA<0.85>Cs<0.15>PbI<3> membrane and full use of the super high electronic mobility of the membrane, the photodetector has superfast response speed, high light absorption performance, and high electromagnetic immunity, and can sense light ranging from ultraviolet to visible light flexibly. The invention raises new prospect for application of Perovskite materials in the photodetector.

A chemical preparation method for a CdTe quantum dot fluorescent probe for detecting a trace amount of paraquat comprises the step of modifying thioglycollic acid on the surface of the CdTe quantum dot fluorescent probe emitting a red emission spectrum band so as to enable the CdTe quantum dot fluorescent probe is provided with carboxyl functional groups on the surface. The preparation process comprises the following two specific steps: firstly, preparing a NaHTe solution; then, synthesizing CdTe quantum dots of which the surfaces are modified with thioglycollic acid, and adjusting the pH value to be 10-12 with KOH, so as to obtain the CdTe quantum dot fluorescent probe. According to the invention, carboxyl with negative charge on the surfaces of the CdTe quantum dots and target paraquat molecules with positive charge have the electrostatic interaction through the positive charge and negative charge, when the CdTe quantum dots and the paraquat approach to each other in space, the red spectrum band emitted by the CdTe quantum dot fluorescent probe can be absorbed by green target analyte paraquat modules through the fluorescence resonance energy transfer principle, and the detection of a trace amount of paraquat can be implemented through the utilization of the variation of the CdTe quantum dot fluorescence intensity.

Provided are DNA microarray techniques that allow hybridization without RNA amplification, without using cDNA, and without labeling the nucleic acid prior to hybridization. Referred to as the Double-stranded Exonuclease Protection (DEP) assay, the technique permits the sample RNA to be used directly for hybridization, without manipulation in any way. Further provided is a microarray technique for high-throughput miRNA gene expression analyses, termed the RNA-primed, Array-based, Klenow Enzyme (RAKE) assay. The RAKE assay is a sensitive and specific technique for assessing single-stranded DNA and RNA targets, and offers specific advantages over Northern blots.

The invention discloses a cable pay-off and take-up device, which comprises a pay-off and take-up coil device provided with a transmission shaft, wherein the transmission shaft is connected with a transmission motor through a transmission mechanism, and in addition, a braking device is arranged between the transmission shaft and the transmission mechanism. The cable pay-off and take-up device has the advantages that the braking device is arranged between the transmission mechanism and the transmission shaft of the pay-off and take-up coil device, when the transmission motor stops rotating, the occurrence of conditions of mechanical inertia existence, heavy load frequent starting and stopping, sudden and unexpected machine halt and the like can be avoided, the transmission mechanism can be instantaneously and reliably in the motionless state, in addition, the operation of the transmission motor under different conditions can be met, the problems that the existing cable pay-off and take-up device cannot realize the automatic braking during the machine halt, and the cables are damaged through the inertia operation can be effectively solved, the automatic control of the equipment is realized, the practical effect is good, the energy sources are saved, and the operation cost is reduced.