42results about How to "Improve usage sensitivity" patented technology

The invention provides a magnetic flourescent nano material for a magnetic-photo sensor and a preparation method thereof. The material is a magnetic flourescent nano material based on nano tubes or nano-fiber micro templates and comprises a tubular or fibroid nano material template with a carboxylic acid functional group, a magnetic material, a biparental molecular material and a quantum dot material. The functional group of the template is chelated with Fe<2+>, Fe<3+>, or Co<2+>; the magnetic material such as Fe2O3, Fe3O4, or FeCo generated after reaction under the action of alkali grows on the surface of the template; the biparental molecule is gelatin, amino acid, polypeptide, or dendroid with a carboxylic end group, one end of which contains carboxyl and the other end contains amino or sulfydryl; the carboxyl of polyamide-amine which is a dendroid molecule is chelated with Fe2O3, Fe3O4, or FeCo nano grains on the template; the amino or the sulfydryl is combined with the quantum dot to obtain the megnetic flourescent nano material through assembling. The nano material has strong magnetic property, high quantum yield and good electrical property. After applied to the preparation of magnetic-photo sensors, the nano material can improve the accuracy and the sensitivity of the magnetic-photo sensors.

The invention discloses an acridine marker conjugate and a preparation method thereof and a chemiluminescent kit. The acridine marker conjugate comprises an acridine substitute, polyamino acid and to-be-marked protein; the polyamino acid contains carboxyl and amino; the to-be-marked protein is amino protein, modified protein, polypeptide or modified polypeptide. The polyamino acid of the acridine marker conjugate reacts with the acridine substitute through the amino of the polyamino acid to form chemical bond connection, the amino of the to-be-marked protein reacts with the carboxyl of the polyamino acid to form a -NH-CO- structure, and accordingly the polyamino acid and the to-be-marked protein are connected together, active sites of the to-be-marked protein are protected from being interfered by the acridine substitute due to relative determinacy of binding sites, and the acridine marker conjugate is relatively high in activity.

A magnet type plunger pump comprises a liquid inlet check valve, a tee joint device, a liquid outlet check valve, a cylinder body, a plunger, a seal ring and an eccentric wheel. An annular hollow permanent magnet of the cylinder body is arranged at a liquid access port of the cylinder body, and a hollow magnetic shield of the cylinder body is arranged between the cylinder body and the annular hollow permanent magnet of the cylinder body; an annular solid permanent magnet of the plunger is arranged at the inner end of the plunger, and a concave magnetic shield of the plunger is arranged between the plunger and the annular solid permanent magnet of the plunger; the annular solid permanent magnet of the plunger and the annular hollow permanent magnet of the cylinder body are arranged in opposite and repel mutually; the liquid inlet check valve and the liquid outlet check valve are both magnet type check valves. The magnet type plunger pump has the advantages that since reset springs in existing plunger pumps are replaced by the annular solid permanent magnet of the plunger and the annular hollow permanent magnet of the cylinder body which are arranged in opposite, service life of the plunger pump is remarkably prolonged, and flexibility of the plunger pump is evidently improved.

The invention belongs to the field of composite materials, and discloses a heat-conducting flame-retardant epoxy resin composite material and a preparation method thereof. The composite material comprises an epoxy resin matrix and molybdenum disulfide coated reduced graphene oxide-silver nanowire aerogel, wherein the molybdenum disulfide coated reduced graphene oxide-silver nanowire aerogel is dispersed in the epoxy resin matrix; and the volume ratio of the epoxy resin matrix material to the molybdenum disulfide coated reduced graphene oxide-silver nanowire aerogel is 100: 1-100: 5. Accordingto the heat-conducting flame-retardant epoxy resin composite material, the molybdenum disulfide coated reduced graphene oxide-silver nanowire aerogel is added into the epoxy resin to serve as a filler, the adding ratio of the filler is controlled, and meanwhile, the overall process flow design and the like of the preparation method of the composite material are improved, so that the technical problems that the thermal conductivity and the flame retardance of an existing electronic packaging material are poor, and the processing performance and the mechanical performance of the epoxy resin matrix are influenced when too much filler is added can be solved.

The invention discloses an acridine marker conjugate and a preparation method thereof and a chemiluminescence immunoassay kit. The acridine marker conjugate comprises an acridine substitute, a connecting carrier, a difunctional cross-linking agent and an object to be marked which are connected in sequence. The acridine substitute and amidogen on the connecting carrier react to form a -CO-NH- structure so as to connect the acridine substitute with the connecting carrier. By means of the connecting carrier and the difunctional cross-linking agent containing a maleimide group and a hydrazide group, the acridine substitute and the object to be marked are not subjected to chemical bond connection directly, interference is formed by the acridine substitute on an active site on the object to be marked is avoided, the activity of the acridine marker conjugate is made higher, and the sensitivity of immunoassay is improved.

The invention discloses an acridine-labeled conjugate, a preparation method thereof, and a chemiluminescence kit. The acridine-labeled conjugate includes acridine substituents connected in sequence, a carrier protein and a protein to be labeled; the carrier protein is a carboxyl- and amino-containing Protein, modified protein, polypeptide or modified polypeptide; the protein to be labeled is amino-containing protein, modified protein, polypeptide or modified polypeptide. The carrier protein of this acridine-labeled conjugate forms a chemical bond connection through the reaction of the amino group on the carrier protein with the acridine substituent, and the amino group on the protein to be labeled reacts with the carboxyl group on the carrier protein to form a ‑NH‑CO‑structure so that the carrier protein Linked with the protein to be labeled, the binding site is relatively definite, avoiding the interference of the acridine substitute on the active site on the protein to be labeled, and the activity of this acridine-labeled conjugate is relatively high.

The invention discloses an integrated pressure-sensitive fingerprint packaging structure and an integrated pressure-sensitive fingerprint module. The integrated pressure-sensitive fingerprint packaging structure integrally packages a pressure sensing module and a fingerprint biological identification module in the same structure, thus a new fingerprint packaging method is proposed, namely, the traditional pressure sensing module (a thin film pressure sensitive piece) and the fingerprint identification module (a fingerprint chip) are integrated in the same packaging structure, thus the packaging structure as a stress sensing characteristic of a pressure sensing thin film and a fingerprint biological identification characteristic of a silicon wafer, and the use flexibility and reliability of pressure and fingerprints can be effectively improved, therefore, the design space is reduced, the performances are improved, a new interactive experience is brought for various types of electronic interactive equipment, and the equipment interacting on the mobile internet is more effective and rapid.

The invention discloses a ball switcher, which comprises the following parts: base, a seal launcher and a receiver assembled in the seal container jacketed in the base to mate mutually, seal container jacketed in the base to contain ball and bearing unit, lid to cover the base, wherein the inner cylinder contains a basic wall and optical inlet hole through the basic wall to face the straight communicating path; the inner lid concludes a cap, a self-sealing moulding projection and optical outlet hole through the projection to face the straight communicating path; the ball rolls between the baffling position and the separating position of straight communicating path. The invention can prevent ball not lying at the baffling position, which can reduce the error movement generating rate.

The invention discloses an intelligent conveying pipeline capable of displaying a pipeline blockage position. The intelligent conveying pipeline capable of displaying the pipeline blockage position comprises an inner-layer pipe, a steel wire reinforcing layer, a compression-resistant layer, an optical fiber ribbon layer and an outer-layer pipe which are sequentially arranged from inside to outside, wherein the steel wire reinforcing layer and the compression-resistant layer are both single-layer or multi-layer. According to the intelligent conveying pipeline capable of displaying the pipeline blockage position provided by the invention, the optical fiber ribbon co-extrusion mode is adopted, an optical fiber ribbon prepared in advance is ingeniously combined with a gathering and transportation pipeline, and the pipeline blockage position is judged according to the temperature change of the gathering and transportation pipeline. When blockage occurs, the blockage position can be quickly positioned, operation can be recovered only through fixed-point excavation and simple repair, and the intelligent conveying pipeline capable of displaying the pipeline blockage position is simple and efficient. In addition, the optical fiber is high in reliability, can work in a severe environment, is not influenced by temperature, humidity and pH value, is durable, does not need to shield an electromagnetic field during use, is high in use sensitivity, and is convenient to detect.

The invention discloses an expandable and reconfigurable multi-level sensing flexible robot skin. The flexible sensing light-emitting array is connected with the data reading and processing unit and the micro-control unit. The micro-control unit is connected with the flexible robot skin expansion connection interface and the flexible robot skin data output interface. The flexible sensing light-emitting array realizes a multi-level sensing function by switching an approaching sensing mode and a pressure sensing mode, and the micro-control unit realizes sensing mode switching and reconstruction of the flexible sensing light-emitting array by controlling the data reading and processing unit. The flexible robot skin has the functions of approaching sensing, pressure sensing, detection result in-situ visualization, skin structure expandability, flexible approaching sensing unit reconfiguration and the like. Compared with a traditional single-mode resistive pressure sensor and a capacitive approaching sensor, the sensor combines the advantages of the two types of sensors, and has the characteristics of high sensitivity, simple device structure, simple manufacturing process, high spatial resolution and the like.

The invention discloses a dustproof mechanical keyboard switch capable of being automatically assembled easily and an assembly method thereof. The dustproof mechanical keyboard switch comprises an upper cover, a base body, a guide core, a reset spring, a static plate and a movable spring plate, wherein the upper cover is arranged on the base body; the upper cover and the base body are enclosed to form an accommodating space; a through hole which runs through the accommodating space is formed in the upper cover; the reset spring is arranged in the accommodating space; the guide core is connected to the reset spring and can extend out of the through hole in a sliding manner; the movable spring plate is driven by the guide core to be in contact with the static plate or to be separated from the static plate; the guide core and the upper cover are in folded and staggered arrangement through a first dust-break wall and a second dust-break wall to effectively prevent external dust from entering the inside of the keyboard switch; and the static plate and the movable spring plate are tightly embedded into a first mounting groove and a second mounting groove respectively to assemble and fix the static plate and the movable spring plate on the base body. Therefore, the automated assembling capacity of a product is improved under the premise of ensuring relatively good dustproof property; the assembly efficiency and the assembly quality are improved; and the product stability is strengthened.

The invention discloses a thin keyboard, comprising a bottom plate assembly, a plurality of keys and a thin switch, wherein the bottom plate assembly comprises a circuit board and a support plate; the keys are arranged on the bottom plate, each key is provided with a key cap and a scissor pin above the key cap in sequence from top to bottom, the upper part of the scissor pin is in contact connection with the key cap, and the lower part of the scissor pin is connected with the support plate; the thin switch is connected with the circuit board, and comprises a surface cover, a press part, a base, a sounding piece and a contact spring, wherein the surface cover is provided with a press hole in the center; the press part is mounted in the press hole of the surface cover; the base is connected with the surface cover by riveting, the base is provided with a contact spring accommodating groove in the center, and the circumference of the contact spring accommodating groove is a base groove wall; the sounding piece is located on the base groove wall; the contact spring is horizontally arranged in the contact spring accommodating groove, the top of the contact spring is lower than the upper surface of the base, and the conducting part of the contact spring is located on the side of the base. The thin keyboard has the advantages of simple structure, low thickness, good user experience and the like.

The invention discloses a capacitive type light touch switch. The capacitive type light touch switch comprises an upper electrode slice, a lower electrode slice, a button and an insulation spacer, wherein the upper electrode slice and the lower electrode slice are arranged oppositely; the button is arranged on the upper electrode slice; the insulation spacer is arranged between the upper electrode slice and the lower electrode slice. After the upper electrode slice and the lower electrode slice are powered on, the button pushes the upper electrode slice to move or elastically deform towards the lower electrode slice according to the pressed situation of the button, so that the distance between the upper electrode slice and the lower electrode slice is changed, and then the capacitance between the upper electrode slice and the lower electrode slice is changed. The invention further discloses a switching circuit and a key system. A switching contact is not needed in the light touch switch, the finger touch of the light touch switch is reserved, the service life of the light touch switch is prolonged, the flexibility of the light touch switch is improved, and cost is low.

The invention relates to the field of mechanical claws, in particular to a multi-axis numerical control mechanical claw based on a parallel mechanism. The multi-axis numerical control mechanical claw comprises a grabbing structure, a parallel rotating structure and a packaging shell, wherein the bottom of the parallel rotating structure is rotationally connected with the packaging shell, a mechanical claw angle adjusting cavity is formed in the packaging shell, an angle control structure is arranged in the mechanical claw angle adjusting cavity, and the bottom end of the angle control structure is hinged to the grabbing structure; and the grabbing structure comprises a first fixing plate, a first rotating rod, a second rotating rod, a second fixing plate, a third rotating rod, a clamping plate, fixing rods, a third fixing plate, a first motor 19 and a lead screw 191, and the top ends of the four fixing rods are in threaded connection with the bottom of the third fixing plate. The angle control structure and the rotating structure are arranged at the bottom of the parallel rotating structure, so that the rotating angle of the parallel rotating structure is increased, the mechanical claw can be applied to more working scenes, and the sensitivity of the mechanical claw is effectively improved.

The invention discloses a pure-solid-wood digital display device which comprises a solid-wood casing, an LED display screen (2) and a main control board (3), wherein the LED display screen and the main control board are arranged in the solid-wood casing. The pure-solid-wood digital display device is characterized in that a groove (6) is formed in the inner side of a front wall of the solid-wood casing, the LED display screen (2) is arranged in the groove (6) with the front side facing inwards, and the thickness of the groove bottom of the groove (6) is 0.2 to 0.5mm. The pure-solid-wood digital display device has the advantages that the solid-wood casing of the thickness has good light transmission when the LED display screen is switched on, the solid-wood casing can prevent numbers on the display screen from being presented when the LED display screen is switched off, and accordingly use attractiveness is improved.

The invention relates to a terminal printing device protection device with automatically opened and closed covers. The terminal printing device protection device comprises an integrated shell. The lower portion of the shell is in a rectangular shape. The upper portion of the shell is in a rectangular shape with the thickness smaller than that of the lower portion of the shell. A rectangular paper outlet is formed in the front side face of the lower portion of the shell. A processor is installed at the lower portion of the shell. The processor is connected with a motor drive plate located at the lower portion of the shell. A stepping motor is fixed to each of the left side and the right side of the rear end face of the upper portion of the shell. The stepping motors are connected with the motor drive plate. According to the terminal printing device protection device with the automatic opening and closing cover, the arc shell covers automatically opened and closed are additionally arranged on the integrated terminal protection shell and are automatically closed and opened according to the condition of whether people use the device or not on the field, it is ensured that a touch screen is protected when the device is not used, dust concentration is avoided, unnecessary impacts are avoided, rainwater invasion can also be prevented at ordinary times, the service life of the touch screen is prolonged, and the use sensitivity of the touch screen is improved.

The invention discloses an easy-to-install bearing seat, which comprises a mounting plate, a bearing base and a bearing casing. The two sets of bearing bases are fixed in the middle of the bearing housing, the inner wall of the bearing housing is provided with steel balls, the outer wall of the steel ball is covered with a cage, and the center of the steel ball is covered with a bearing inner wall The inner and outer walls of the inner sleeve of the bearing are coated with a layer of rubber pad, and the inner fixed sleeve of the rubber pad has a bearing, and the bearing base is fixed with the mounting plate by small-diameter bolts; the easy-to-install bearing Seat, by setting a movable bearing seat on the mounting plate, when the bearing is installed, it can be fixed according to the position of the bearing, which improves the mutual cooperation between the bearing and the bearing seat, and has strong flexibility, thus reducing both The degree of wear between them improves work efficiency and meets production needs.

The invention discloses a vehicle mechanical steering wheel assembly. The assembly comprises a steering wheel, a steering column, a connecting stud, a steering shaft, a pin and a shock-absorbing rubber sleeve, the steering column is arranged below the steering wheel, the connecting stud is arranged in the steering column, the steering shaft is arranged behind the steering column, the steering shaft is rotatably connected with the steering stud through the steering column, the steering shaft is arranged behind the pin, the shock-absorbing rubber sleeve is arranged behind the pin, and the shock-absorbing rubber sleeve is in contact connection with the steering shaft through the pin. By means of the assembly, an interior buffering spring is conveniently matched by arranging the pin with the shock-absorbing rubber sleeve to enhance the buffering capability with a shaft rod, the protective effect on the buffering spring is enhanced by arranging a lower steering shaft with a plastic sleeve to prevent the invasion of oil, and the assembly is simple in structure and easy to implement.

The invention discloses an anti-collision sensing type door and window opening and closing device, and relates to the technical field of vehicle structures. The device is sensitive, flexible to mount, not prone to being damaged, reliable and durable in use. The device is a non-contact type door and window opening and closing device with both corrosion preventing of external vehicle parts and sealing of internal vehicle parts considered. The device comprises a sensing base nut (1), a spring (2), a steel ball (3), a door and window sensing base (4), a door and window opening and closing sealing sleeve, a door and window opening and closing fixing fastener assembly and a door and window opening and closing sensor. All door and window opening / closing state signals of a vehicle are provided for a driver of the vehicle. The device is simple in structure, the device is improved based on an original vehicle door and window opening and closing device, an elastic contact mode is adopted, the service life of the door and window opening and closing device is greatly prolonged, the sensitivity of the door and window opening and closing device is greatly improved, and part of daily using and maintaining cost is saved for users of the vehicle.

The invention discloses a processing technology of a planar thick copper PCB. The technology comprises: S2, enabling an upper surface circuit and a lower surface circuit of a semi-finished PCB to be covered by resin in prepregs, and enabling the circuits to be filled and leveled up by the resin in the prepregs; S3, grinding off redundant resin on the surface circuit by using a ceramic grinding brush on grinding equipment so as to ensure that the conductive pattern of the surface circuit is just exposed; S4, the grinding frequency is controlled within 5-6 times, and at the moment, the exposed circuits and the resin filled between the circuits are located on the same plane; S6, performing surface treatment on the pattern of the PCB for the multi-turn precision wire-wound potentiometer; and checking the PCB after surface treatment, thereby finally obtaining the finished product of the PCB for the multi-turn precision wire-wound potentiometer. The invention has the beneficial effects thatthe pointer and the base material can be leveled into the same plane, the pointer can be ensured to smoothly rotate after being assembled by a user, and the contact sensitivity of a product is improved.

The invention discloses a multi-mode expandable interactive flexible robot skin and a preparation method thereof. The flexible sensing unit array is connected with the data reading and processing unit through the fly line connecting unit, the flexible sensing unit array is further directly connected with the data reading and processing unit, and the data reading and processing unit is further connected with the micro-control unit and the address configuration unit. The micro-control unit is further connected with the flexible sensing unit array, the flexible robot skin expansion connection interface and the flexible robot skin data output interface. The flexible sensing unit array is provided with an approaching sensing mode and a pressure sensing mode, and the micro-control unit achieves switching of the approaching sensing mode and the pressure sensing mode of the flexible sensing unit array by controlling the data reading and processing unit. According to the conduction state of the upper electrode layer and the lower electrode layer, time division multiplexing in function is achieved, free switching between approaching sensing and pressure sensing is achieved, and the skin space utilization rate of the flexible robot is greatly increased.

The invention provides a blowoff valve and a liquid chromatograph. The blowoff valve and the liquid chromatograph are used for cooperating with a conveying pump for use. The blowoff valve comprises avalve body, a valve element and a detection assembly, wherein the valve element is arranged on the valve body and can move relative to the valve body so as to adjust the working state of the valve body, the detection assembly is arranged on the valve body or the valve element, the detection assembly is used for detecting the working position of the valve element relative to the valve body, the detection assembly is used for being in communication connection with a controller, the controller is used for being in communication connection with the conveying pump, and the controller adjusts the working state of the conveying pump according to the working position. Thus, the control is convenient, fast and reliable. The liquid chromatograph comprises the blowoff valve and has all the advantagesof the blowoff valve.

The invention provides a neutron-compensating-while-drilling logging device, for real-timely measuring stratum porosity around borehole in the well drilling course, where the side surface of a drill collar is made with a U-shaped groove, in which from the top down is equipped with receiver module compressive cylinder and generator module compressive cylinder, where they are equipped with receiver installation framework and generator installation framework, respectively, the receiver installation framework is equipped from the top down with signal processing circuit module, far neutron detector, far detector screening block, near neutron detector and near detector screening block inside, and the generator installation framework is equipped from the top down with generator control circuit, radiating device and neutron generator inside. And it adopts deuterium-deuterium reaction accelerator as neutron source, reducing radioactive damage to the human and environments and has longer service life and higher sensitivity, applied to geology- oriented well drilling.