54results about How to "Good anti-electromagnetic interference" patented technology

The invention discloses a multifunctional intelligent distillation instrument. The distillation instrument comprises a shell, a support, heating devices and a cooling device, wherein the heating devices are a plurality of relatively independent heating units, and each heating unit comprises a heating jacket, a heating bar, a heating bowl and a distillation bottle; the heating bowl is arranged in a heating box, the open end of the upper part of the heating bowl is provided with a stove port, and the distillation bottle is arranged in the stove port; the heating jacket is fixed on the periphery of the heating bowl; and the distillation instrument is also provided with a measurement and control device, a temperature sensor is fixed on the top of each heating bowl and connected with a control circuit board through a signal wire and transfers heating temperature to a control chip on the control circuit board, and a liquid level sensor is fixed on a console and senses the liquid level state in a volumetric flask through an optical fiber. The instrument can be widely applied to distillation treatment of projects of volatile phenol, cyanide, ammonia nitrogen, Kjeldahl nitrogen, water in oil and the like in various chemical laboratories requiring distillation treatment in environment friendliness, disease control, water supply and drainage, colleges, research institutions, industrial enterprises and the like.

This invention discloses optical acceleration sensor based on Fresnel diffraction lens, which contains optical fiber, glass substrate, Fresnel diffraction micro lens, micro reflection film, micro quality block, micro balance spring and casing, wherein the micro reflection film parallel set with Fresnel diffraction micro lens with miniature gap, whose opposite side coated with metal reflection film, another side worked out an acceleration sensitive micro quality block, micro reflection film connected with fixed frame by four plane micro spring, optical fiber fixed the focus point of Fresnel diffraction micro lens for transmitting light, the external acceleration makes micro quality block driving micro reflection film to generate displacement, to change the light strength of focus of Fresnel diffraction micro lens, the acceleration can be tested by testing the change of light strength in optical fiber. Said invention can be used in aircraft control system and other fields demanding high precision sensing and high anti electromagnetic interference.

The invention discloses a high-temperature resistant FBG (fiber bragg grating) sheet type strain sensor and a manufacturing method thereof. The strain sensor consists of an FBG, a polyimide film, an armored cable and an optical fiber connector, wherein the FBG is connected with the polyimide film; the armored cable is connected with the FBG; the optical fiber connector is connected with the armored cable; and when the strain of a structural component is monitored, the surface of the monitored object needs to be milled by abrasive paper, and the polyimide and FBG composite sheet is stuck on the monitored object with adhesives. The method adopts a polyimide curing technology and comprises the following steps of: sealing the FBG and polyimide into a mould, and organically combining through heating, curing and cooling to form a polyimide and FBG composite sheet; leading out the armored cable from the end part of the polyimide and FBG composite sheet; and sticking the polyimide and FBG composite sheet on the surface of the structural component to be monitored by use of high-temperature resistant adhesives. The strain sensor disclosed by the invention resists high temperature, has good durability and high measurement accuracy, and is in quasi-distributed arrangement, free from electromagnetic interference and convenient to construct.

The invention discloses a Type-C anti-EMI plug connector, which comprises an upper terminal module, a lower terminal module, an insulating body and a shielding housing, wherein the upper terminal module comprises an upper terminal base and a plurality of first conductive terminals; the lower terminal module comprises a lower terminal base and a plurality of second conductive terminals; the insulating body comprises an upper shell and a lower shell; the upper shell is combined with the lower shell to form an insertion space; a plurality of through holes are arranged at the front ends of the upper shell and the lower shell at intervals; a two-way elastic contact arm is inlaid in the edge of each through hole and comprises a fixed end and a free end; each fixed end is inlaid in the edge of the corresponding through hole; each free end comprises a first contact part and a second contact part; and the shielding housing sleeves the outside of the insulating body. Therefore, a plurality of two-way elastic contact arms are inlaid into the front ends of the upper shell and the lower shell; the two-way contact design can guide noise at the shortest distance; an efficient anti-electromagnetic interference effect is obtained; furthermore, the structure is simple; and automatic integral molding and assembling are facilitated.

The invention discloses a cable for nuclear magnetic resonance instruments, and belongs to the technical field of special wires and cables for medical instruments. The cable comprises a cable core, aninner braided layer, an outer braided layer, an isolation layer and a sheath layer. The inner braided layer, the outer braided layer, the isolation layer and the sheath layer are sequentially arranged outside the cable core, the cable core comprises a shielding layer, control lines and power lines, the control lines and the power lines are positioned in the shielding layer, the inner braided layer is positioned outside the shielding layer, tin-plated copper wires are braided to form the inner braided layer, tin-plated copper wires are braided to form the outer braided layer, the isolation layer is made of isolation paper, and the sheath layer is made of polyurethane and is extruded and coated outside the isolation layer by means of armor extrusion. The cable has the advantages that the cable is excellent in dielectric ability, the outer diameter of the cable core can be reduced, and the stability of dielectric constants and the excellent signal transmission capacity can be guaranteed;the cable is flexible and is excellent in electromagnetic interference resistance; the cable is high in strength and elastic modulus, is excellent in low-temperature resistance and alcohol tolerance,is excellent in resistance to chemical corrosion of ETO (ethylene oxide) and the like and is perfect in ultraviolet radiation resistance.

The invention discloses a passive temperature test system for the key point of primary equipment in a substation. The system comprises a UHF-RFID electronic tag, a reader and a background management and analysis system. The passive electronic tag is attached to an equipment temperature detection point. An operator carries the hand-held reader to conveniently read the actual temperature of the equipment temperature detection point. The hand-held reader transmits the temperature information to a background server in the serial communication manner. The temperature information analysis of the electronic tag is realized based on the background system software in combination with the network communication technology, the database management technology and the like. Meanwhile, the current state information of the equipment is automatically provided.

The invention discloses a double cladding optical fiber temperature sensor, which comprises a double cladding sensing segment with length of 2-6mm consisted of a fiber core, an inner cladding and an outer cladding on the step type optical fiber and a device for fixing the outer cladding; the inner cladding of the sensing segment with outer diameter of 11-20um is formed by partly eating off the original cladding; and the outer cladding is formed by coating polymer material on the inner cladding. Compared with the current optical fiber sensors, the invention not only has the advantages of good insulating property and electromagnetic interference prevention, but also has the advantages of simple structure, low manufacturing cost and low signal acquisition and conversion cost; moreover, under a certain condition, while the environment temperature changes for 10 degrees centigrade, the light power output by the sensor can change for -50dB; therefore, the invention is especially suitable for temperature alarm, can be widely used for remote temperature sensing and alarming in the places of petroleum producing, processing and storing, transformer station and inner part of large scale transformer.

The invention discloses a 360-degree freely rotatable data line connector and a connection method, which include a U-shaped base, the U-shaped base includes two mutually symmetrically connected bending parts, and a 360-degree free-rotatable data line connector. The connector also includes a first connection port disposed at the junction of the two bending parts, a rotating shaft penetrating through the two bending parts, and a rotating conversion head connected to the rotating shaft, the rotating conversion head includes a connection The rotary conversion head base on the rotation axis, the second connection port connected with one end of the rotary conversion head base, and the third connection port connected with the other end of the rotary conversion head base. By connecting the two connection ports on the base of the rotary conversion head by means of a rotating shaft, the 360-degree free rotation and switching of the connection ports is realized. The whole is stable, small in size and easy to carry.

This invention provides a kind of electric connector. It concludes: a plastic stand, on which is arranged with a connecting slot and many terminals. Each terminal is arranged with a pin part which extends out of the plastic stand; a metal shell which uses aluminium to machining integrative shaping by extruding. It forms an outer casing without joints, which coats the plastic stand; at least a clip component which sets a fixing part and at least a clip spring sheet. It is assembled and fixed in the plastic stand through the fixing part. The clip spring sheet is positioned in the connecting slot of plastic stand. There is a protuberant clip part close to the end. The clip part is used to clip a clamping hole of transmission line joint; at least a ground connecting component which is arranged with a locating part and at least a ground connecting spring sheet. It is located at the plastic stand through the locating part and connected with metal shell. Each ground connecting spring sheet is in the connecting slot.

The invention discloses an airplane surface pressure detection system and belongs to the airplane pressure detection technology field. The airplane surface pressure detection system comprises a sheath, a fiber, a sensitive diaphragm, a photoelectric coupler, a laser device, a wavelength division multiplexer and a demultiplexer, wherein the sheath comprises an outer sheath and an inner sheath, the sensitive diaphragm is arranged between the outer sheath and the inner sheath, a reflection chamber is arranged between a side face of the sensitive diaphragm close to the inner sheath and the inner sheath, one end of the fiber is connected with the laser device, the other end is connected with the photoelectric coupler, multiple branch fibers are arranged between two ends of the fiber, the other ends of the branch fibers correspond to the reflection chamber, end faces of the branch fibers corresponding to the reflection chamber are plated with reflection layers, the wavelength division multiplexer is arranged at an output end of the laser device, and the demultiplexer is arranged at an input end of the photoelectric coupler. The system is advantaged in that weight reduction of an aircraft can be facilitated, the space is saved, design is simplified, and stealth and anti-electromagnetic interference of an airplane are facilitated.

The invention relates to a sensor structure used for a Doppler flow instrument and an assembly method thereof, pertaining to the technical field of flow measurement of industrial fluids. The technical scheme is characterized in that an upper twisted pair (7) at the end part of a signal cable (5) is connected with a Doppler resonance wafer (3); the signal cable (5) and a shielding net (6) are locked into a main housing (1) through a locker (4) such that the shielding net (6) of the signal cable and the main housing (1) form an equipotential metal cavity structure; the cavity structure of the main housing (1) is filled with soft silica gel by pouring through a gluing screw opening hole (9) and filled by 2/3; and a Doppler resonance wafer of a transmitting transducer is a piezoelectric ceramic wafer P-8 series and a Doppler resonance wafer of a receiving transducer is a piezoelectric ceramic wafer P-5 series. The sensor structure used for the Doppler flow instrument and the assembly method thereof have following beneficial effects: production cost is low; promotion is easily carried out; a sensor can be used in a complex environment; and by improving sensitivity, stable operation of the sensor is ensured.

The invention discloses a wiring groove for a rail vehicle. The wiring groove comprises a bottom plate, and a plurality of ventilation holes are formed in the bottom plate. The wiring groove is characterized in that a plurality of isolation plates are connected to the bottom plate in an inserted mode, plate grooves are formed in the two opposite vertical planes of every two isolation plates, an n-shaped cover plate is arranged between every two isolation plates and is inserted into the corresponding plate groove to form a wiring groove space, and an isolation cover is arranged in each wiring groove space. The isolation plates and the cover plates can be quickly inserted through a groove body structure, and the isolation covers can be quickly closed through a shaft structure; the wiring groove is provided with the wiring groove spaces so that strong-current, weak-current and signal wiring can be carried out separately, wiring efficiency and accuracy are improved, and meanwhile, electromagnetic interference can be well prevented through the isolation plates and the isolation covers.

The invention discloses a preparation method of a perchloroethylene anticorrosion static conductive coating, which belongs to the chemical technical field. According to the invention, perchloroethylene is taken as a film former, modified phenolic resin is taken as reinforced resin, conductive graphite treated by a surface modifier is taken as a static conductive agent, the prepared anticorrosion static conductive coating possesses excellent anti-corrosive property, scalelike conductive graphite is added, the surface resistivity of the coating can be controlled at 10<6>-10<7>W, so that the thermal expansion coefficient and shrinkage of the coating are small, and the coating possesses excellent static conductive performance and anti-electromagnetic interference performance. The coating can be used for anticorrosion, flame retardation and static conduction coating on the surface of a steel structure and other metal products under scurviness environment, such as coating with anticorrosionand static conduction on the bridge, ship, train and railway facility, automobile, sea engineering facility, petroleum chemical pipeline equipment, medical health apparatus and the like.

The invention relates to a capacitive orientation detection circuit. The capacitive orientation detection circuit is characterized by comprising an emitter electrode, three receiver electrodes, a power supply module, an oscillation circuit and a detection circuit; through the capacitive orientation detection circuit, target detection and orientation identification can be realized, the capacitive orientation detection circuit is mainly applicable to conducting objects such as armored objects and airplanes; the capacitive orientation detection circuit is technically characterized in that multiple detection electrode sets are disposed in the space, distances from a target to electrodes are different, and target orientation can be derived according to difference of demodulation voltage change amount; the receiver electrodes employ a multi-receiver-electrode array mode, and independent three-path detectors are utilized for detection. The capacitive orientation detection circuit is advantaged in that a capactive proximity sensing fuse working in a quasi-electrostatic field has properties of high spacing precision, good electromagnetic interference resistance and stealth resistance, and the capacitive orientation detection circuit can be in matching with any bomb with burst height requirements about 2m, and is especially suitable for bombs in strong electromagnetic interference field operation environments.

The invention relates to a force measuring device for anti-seismic vibration testing of a building. The force measuring device comprises an acceleration sensor, a battery arranged around the acceleration sensor, and a circuit module group arranged inside the battery. At least one memory card is connected in the circuit module group detachably. The acceleration sensor is powered by the battery and is used for transmitting a measuring signal and storing the signal into the memory card of the circuit module group. According to the provided force measuring device, because the acceleration sensor, the power supply, and the memory card for storing testing data are combined into one structural component operating independently, cables like a power line and a data line that extend outwardly can be saved, the damages on structure sealing by the cable exits can be avoided, and additional weights are reduced; configuration of expensive multi-path data collection equipment and configuration of an external power adapter are not required; debugging work like impedance matching on the scene is not needed; after data collection, the memory card is removed and then a common card reader is needed, so that lots of money and time can be saved.

The invention discloses an airplane surface temperature detection system and belongs to the airplane temperature detection technology field. The airplane surface temperature detection system comprises a sheath, a single-mode fiber, a multi-mode fiber, a hollow tube, a laser device and a photoelectric coupler, wherein one end of the single-mode fiber is connected with the laser device, one end of the multi-mode fiber is connected with the photoelectric coupler, the hollow tube is embedded in the sheath, the other end of the single-mode fiber and the other end of the multi-mode fiber are arranged in the hollow tube, end faces of the single-mode fiber and of the multi-mode fiber and the hollow tube form an enclosed chamber, the end faces of the single-mode fiber and of the multi-mode fiber are in parallel with each other in the enclosed chamber, the end faces are bonded with high reflection films, and light signals emitted by the laser device pass through the single-mode fiber, then pass through the enclosed chamber and pass through the multi-mode fiber to enter the photoelectric coupler. The airplane surface temperature detection system is advantaged in that weight of an aircraft can be reduced, the space is saved, design is simplified, and stealth and anti-electromagnetic interference of an airplane are facilitated.

The invention discloses an allocator which comprises a shell and a cover plate. The shell is an integral structure die-casted by a magnesium alloy material. The shell is provided with a mounting hole and at least three hollow thread rods. As the wall of the shell made by magnesium alloy is a little thinner and the specific weight of the magnesium alloy is relatively low, the weight of the allocator is reduced. Besides, the products have favorable electromagnetic shielding property and strong electromagnetic interference resistance using the shell of magnesium alloy.

The invention provides a microwave optical signal wireless laser transmission device and method, and belongs to the technical field of microwave optical signal transmission. The problem that in the prior art, microwave optical signal long-distance wireless laser transmission cannot be conducted between two platforms moving relatively is solved. The device comprises a first tracking unit, a secondtracking unit, an alignment unit, a signal transmitting optical fiber and a signal receiving optical fiber, wherein the first tracking unit is connected with the second tracking unit, the second tracking unit is connected with the alignment unit, the signal transmitting optical fiber is connected with the second tracking unit, the alignment unit is connected with the signal receiving optical fiber, and an optical antenna is arranged in the first tracking unit. The device and method are mainly used for long-distance wireless laser transmission of microwave optical signals.

The invention discloses radiation-proof rare earth modified waterborne chlorosulfonated polyethylene anticorrosive paint and a preparation method thereof. The radiation-proof rare earth modified waterborne chlorosulfonated polyethylene anticorrosive paint is characterized by being prepared from, by weight, 1-2 parts of nanosilicon dioxide, 50-60 parts of chlorosulfonated polyethylene emulsion, 1-2 parts of lead powder, 3-6 parts of sodium dodecyl sulfate, 3-5 parts of lanthanum oxide, 20-30 parts of salpeter solution, 2-4 parts of graphene oxide, 3-5 parts of talcum powder, 6-9 parts of ammonium bicarbonate solution, 3-5 parts of titanium dioxide, 5-10 parts of conductive graphite, 3-6 parts of waterborne epoxy resin, 3-6 parts of polyacrylic acid and 5-10 parts of silane coupling agent KH560. The talcum powder and a rare earth compound are combined, and the corrosion resistance, aging resistance, abrasion resistance and glossiness of the paint are improved; the static conductive graphite is added into the paint, so that the paint has excellent static conductive and electromagnetic interference resisting performance, and the obtained paint is suitable for protective coating of various kinds of equipment; by adding the lead powder and the like, the radiation-proof function of the paint is achieved.

The invention discloses a cable special for wind energy power generation, and relates to the technical field of cable manufacturing. The cable comprises four sets of cable cores; a water-blocking tape lapping layer, a shielding layer, a general isolation layer, a bearing strengthening layer and an outer protection sleeve layer are sequentially arranged on the outer sides of the four sets of cable cores; a filling layer is arranged between the four sets of cable cores and the water-blocking tape lapping layer; each able core comprises a tinned copper wire conductor; branch separated isolation layers and an insulation layer are sequentially arranged on the outer side of each tinned copper wire conductor sequentially. The cable has the good electromagnetic interference prevention, torsion prevention, environmental protection, oil resistance and ultraviolet protection under the complex occasion, meanwhile has the double functions of signal control and electric transmission and is flexible.