403 results about "Shielded cable" patented technology

The utility model relates to the technical field of acceleration sensors, in particular to a piezoelectric acceleration sensor, which comprises a shell, a mounting cavity is arranged in the shell, a shielding shell is fixedly connected in the mounting cavity, a crystal base is fixedly connected at the bottom end in the shielding shell, a PCB (printed circuit board) is arranged at the upper part in the shielding shell, and the crystal base is fixedly connected with the crystal base. An external force is applied along the polarization direction of the ceramic wafer to deform the ceramic wafer, the inside of the ceramic wafer is polarized, charges with opposite polarities appear on the two stressed end faces, and the ceramic wafer is recovered to an initial state if the external force is removed, so that mechanical energy is converted into electric energy by utilizing the direct piezoelectric effect of the ceramic wafer, and then the electric energy is subjected to signal processing; the sensor outputs 100mv / g alternating current voltage, so that vibration acceleration signals are measured, triangular shearing is adopted by a measuring element, a two-core shielding cable is adopted by a cable, and the sensor is small in size, light in weight and high in applicability.

The invention relates to a method for manufacturing a server shielding cable in the technical field of information, which comprises the following steps of: after a cable structure is determined, manufacturing by adopting a precise extrusion and weaving process, strictly controlling the temperature in a range of 1150-2100 DEG C and the pressure parameter in a range of 0.5-1.5 MPa in the production process, and manufacturing the server shielding cable by adopting the precise extrusion and weaving process. The size precision and consistency of the cable are ensured, the manufacturing defects are found and eliminated in time by using the on-line detection and quality control technology, and the qualified rate and reliability of the cable are improved; after manufacturing is completed, cable wiring design is carried out, a three-dimensional wiring simulation technology is adopted, the wiring path and the bending radius of the cable in a narrow space are optimized, a pulley guide device and an elastic fixing clamp which can adjust tension are designed, stress concentration of the cable in the wiring process is reduced, the service life of the cable is prolonged, and according to the wiring design result, the cable is manufactured. And the overall structure of the cable is further optimized so as to meet the requirements of an actual wiring environment.

The invention discloses an anti-interference resistance detection circuit board and system based on four-wire system measurement, and relates to the technical field of industrial automatic detection. Aiming at the problems of low measurement precision, weak interference resistance and limited channel expansion of a traditional two-wire system, a current loop and a voltage sampling loop which are independently and electrically isolated are adopted, and a lead resistance error is eliminated through Kelvin connection; an EMI filter, a photoelectric coupler and a double-layer shielding cable are integrated, so that the influence of electromagnetic interference and a ground loop is inhibited; a single circuit board supports the parallel connection of at least two measuring units, realizes the cascade connection of multiple boards by combining an EtherCAT bus, and supports 384 channels at most. The measuring error is smaller than or equal to + / -0.1%, the single-channel detection time is smaller than or equal to 10 ms, the requirements of high-density and high-beat scenes such as perovskite photovoltaic glass are met, the method is suitable for 100-100 Momega wide-range resistance measurement, the signal transmission error rate in the industrial strong electromagnetic environment is extremely low, and the detection precision and the system reliability are remarkably improved.

The invention relates to the technical field of cables, and discloses a power shielding cable stranding device for a top drive of an oil platform and a production process, the power shielding cable stranding device comprises a supporting assembly, the upper part of the supporting assembly is provided with a wire feeding assembly, a stranding assembly, a guide assembly and a traction assembly, and the wire feeding assembly is located at the side part of the upper part of the supporting assembly; the stranding assembly, the guiding assembly and the traction assembly are transversely arranged on the upper portion of the supporting assembly along the supporting assembly, the supporting assembly comprises a bottom plate, and a first driving motor is installed on the upper portion of the bottom plate. By arranging an adjusting plate, the problem that a stranded wire is locally bent due to improper storage and carrying or material rigidity difference can be solved. Precise correction is achieved by sensing local deformation of the stranded wire and applying extrusion and drawing force, the situation that the cross section structure of the cable is not uniform due to deflection of a bent part after stranding is avoided, the structural strength of the cable is guaranteed, electric energy loss is reduced, the power transmission efficiency is improved, and the structural stability and transmission performance of the stranded cable are guaranteed.

An apparatus for cutting a previously flared shield conductor of a shielded electrical cable includes a two-piece clamping die having an aperture in which the shielded electrical cable is secured and a cutting surface. The clamping die is opened and closed around the shielded electrical cable. The apparatus further includes a cutting tube configured to be pressed against the cutting surface while the flared shield conductor is between the cutting tube and the cutting surface, thereby cutting a portion of a free end of the flared shield conductor. Alternatively, the apparatus may include a die comprising a cutting surface and an aperture in which the end of the shielded electrical cable is received. The cutting tube has two parts that are closed about the shielded electrical cable and pressed against the cutting surface while the flared shield conductor is disposed between the cutting tube and the cutting surface.

The invention relates to the technical field of shielding type cables, in particular to a shielding type data transmission cable and a preparation method thereof, and the method comprises the steps: drawing a wire core through a wire drawing machine, carrying out the extrusion molding of an insulating material in a molten state, and wrapping the outer layer of the wire core, thereby obtaining an insulated wire core; the method comprises the following steps of: gathering a plurality of insulated wire cores to form a wire harness, twisting and forming the plurality of wire harnesses to obtain a cable core, acquiring stress data of each wire harness and the cable core, calculating an order change interference degree of each stress data in a stress sequence, acquiring a sudden deviation degree of each stress data in the stress sequence, extracting stress abnormal data, and correcting each stress abnormal data. And obtaining the pointing degree of each pointing wire harness and the folding degree of the cable core, and adjusting the wrapping tape tension of a wrapping machine in the preparation process of the shielding type data transmission cable through the deviation between the pointing degree and the folding degree, thereby completing the preparation of the shielding type data transmission cable. According to the invention, the accuracy of adjusting and compensating the belting tension can be improved.

An aspect of the present disclosure is directed to a connector. The connector is suited to connectorizing exactly two conductors. The connector includes a forward connector body, a rear connector body, a metal frame and exactly two electrical contacts. The rear connector body interfaces with the forward connector body. Further, the metal frame, which includes a shielding interface, surrounds at least a portion of both the forward and rear connector bodies. The electrical contacts extend from the rear connector body into the forward connector body. A first of the electrical contacts is electrically coupled to a first conductor of a shielded cable and the second of the electrical contacts is electrically coupled to a second conductor of the shielded cable. The shield interface of the metal frame is electrically coupled to the shield of the shielded cable.

The invention discloses a broadband electromagnetic radiation interference characteristic modeling method for a shielding cable network. The method comprises the following steps: 1) obtaining a scattering parameter matrix of a shielding connector and a transmission parameter matrix of a bent shielding cable; 2) constructing an equivalent N port model of the shielding connector by using the scattering parameter matrix, and deducing a transmission parameter matrix of the shielding connector; 3) establishing a multi-conductor transmission line equation reflecting the distribution of interference current on the shielding cable by using the shielding cable transfer impedance; 4) cascading the transmission parameter matrixes of all the bent shielding cables and the shielding connectors to obtain an overall transmission parameter matrix of the shielding cable network; and 5) solving the multi-conductor transmission line equation in combination with the boundary constraint condition to obtain the common-mode interference current of the shielding layer of the shielding cable, and calculating the electric field radiation of the shielding cable network through the dipole array theory. The method is suitable for uniform and non-uniform shielding cables and shielding cable networks of single-core and multi-core wire harness shielding wire types, and has good universality.

The utility model belongs to the technical field of cables, and particularly relates to a shielded cable, which comprises a conductor, the conductor is formed by mutually twisting a plurality of wires, an insulating layer is wrapped outside the conductor, and a filling layer is wrapped outside the insulating layer. The outer side of the filling layer is wrapped with shielding layers layer by layer. According to the utility model, the shielding net is arranged in the shielding layer, the plurality of rows of magnetic beads are arranged in the magnetic bead mounting layer in a surrounding manner, and the conductive coating is coated between the shielding layer and the magnetic bead mounting layer through the conductive coating, so that the influence of a magnetic field effect generated in a cable electrifying process on peripheral cables, equipment and instruments is effectively prevented; the use efficiency and the service life of peripheral related equipment are relatively improved, particularly for high-precision instruments, the accuracy of the cable is further guaranteed, and the situation that the cable is vivid by external electromagnetic waves is also avoided; and the anti-interference capability of the cable can be improved.

The invention discloses a no-load state monitoring method and system for an aircraft power supply system, and relates to the technical field of electrical parameter measurement and aircraft power supply system monitoring. Initializing a monitoring system, calibrating a voltage sensor, a current sensor, a frequency sensor and an impedance sensor, setting a no-load state judgment threshold system, and importing historical no-load data as a comparison reference; no-load voltage, current, frequency and impedance signals are synchronously acquired through sampling frequency of the sensor group, and the signals are transmitted to the data processing unit through the shielding cable; median filtering and low-pass filtering are adopted to remove noise interference, normalization processing is carried out on the signals, and basic electrical parameters are calculated; calculating core characteristic values of the voltage stability, the frequency fluctuation coefficient, the impedance stability and the harmonic distortion rate; comparing the characteristic value with a preset threshold value, judging whether the state is normal or not by combining historical data, and identifying an abnormal type; and outputting a judgment result in real time, and starting acousto-optic early warning in case of abnormality. Abnormal traceability and trend prediction are realized, and safe and stable operation of an aircraft power supply system is guaranteed.

According to the intelligent operation and maintenance and health monitoring system for the water conservancy and hydropower radial gate, a physical quantity detection module, a data acquisition and processing module, a gate opening and closing control module, a data transmission module, an interface display module and a system management module of the monitoring system are constructed; on-line monitoring parameters of the system are established and analyzed, and the control requirements of the hoist are determined to be opening control and synchronous control; a distributed system overall structure and a communication mode combining an Ethernet bus and optical fiber communication are established; a hardware structure of a monitoring system is constructed, and anti-interference measures of a twisted-pair shielding cable, a filter circuit, single-point grounding, floating ground shielding and a UPS power supply are adopted; a software structure of the monitoring system is constructed, and detailed analysis and program design are carried out on each functional module of software. The system can accurately monitor various state parameters such as stress strain and vibration when the radial gate operates, intelligent operation and maintenance of the radial gate and long-term stable detection of the health state are achieved, and safe and efficient operation of the hydraulic and hydroelectric gate is promoted.

The invention discloses an electromagnetic shielding cable for a radio altimeter and a preparation method thereof, and relates to the technical field of cables. The preparation method comprises the following steps: treating ethylene-tetrafluoroethylene copolymer particles, a mixed compatilizer, a chemical foaming agent and a nano nucleating agent by using mixed gas low-temperature plasma containing acrylic acid, performing melt blending by using a double-screw extruder, injecting supercritical carbon dioxide, and performing slow cooling and shock cooling to obtain a three-dimensional porous matrix containing micro-nano cells; the preparation method comprises the following steps: synthesizing ferroferric oxide particles by a solvothermal method, coating a silicon dioxide dielectric layer, and then chemically silvering to prepare ternary core-shell composite particles; modifying the particles with aminopropyltriethoxysilane and a block copolymer to obtain modified composite particles; melting, mixing and granulating the porous matrix and the modified composite particles to obtain the electromagnetic shielding composite material. And performing extrusion molding on a conductor to form an insulation shielding layer, thereby obtaining the cable. The cable has an excellent electromagnetic shielding effect.

The utility model relates to the technical field of photovoltaic junction boxes, in particular to a self-cleaning arc-proof photovoltaic junction box circuit structure, which comprises an arc detection module, an energy conversion module, a control module, a self-cleaning execution module and a communication module. The arc detection module monitors an arc signal in the junction box in real time and generates a trigger signal, the energy conversion module converts arc energy into direct current and stores the direct current, and the control module monitors the voltage of the capacitor bank and generates an energy release instruction or a restart charging instruction when the voltage reaches a threshold value. The self-cleaning execution module generates shock waves through high-voltage pulses to remove accumulated dust, and the communication module is responsible for uploading data to an external monitoring system. And arc protection is realized by using the shielding cable and the filter circuit. According to the scheme, closed-loop control of energy recovery and self-cleaning is realized, self-cleaning is carried out by utilizing recovered arc energy, the energy utilization efficiency is improved, the safety and self-maintenance capability of the junction box are remarkably improved, the manual intervention frequency is reduced, and the junction box conforms to the green and energy-saving trend.

A longitudinal covering wrapping mold for a shielded cable, said mold comprising a tightening die head (1), a curling die head (2), and a first friction member (3). The curling die head (2) and the tightening die head (1) are spaced apart, the first friction member (3) is arranged between the curling die head (2) and the tightening die head (1), and a truncated-cone-shaped first channel (11) is penetratingly provided in the tightening die head (1). An opening at the end of the first channel (11) close to the curling die head (2) is larger than an opening at the other end of the first channel (11). A second channel (21) is penetratingly provided in the curling die head (2), and an edge of foil wrapped by the curling die head (2) is subjected to friction treatment by means of the first friction member (3), so that the foil is more tightly attached to the surface of a cable core, and the wrapping shielding effect is improved. The fit between the foil and the cable core and the foil wrapping effect are improved by means of the first friction member (3), and the present invention has good application prospects.

The invention relates to the technical field of cables, in particular to a torsion-resistant shielding cable and a manufacturing method thereof.The torsion-resistant shielding cable comprises a cable core, a filling layer, a wrapping shielding layer, an isolating layer, a braided shielding layer and an outer sheath, the braided shielding layer is coated with a bonding layer capable of filling the gap between the first braided unit and the second braided unit, under the action of the bonding layer, the broken monofilament is still attached to the adjacent monofilament, the broken position of the monofilament cannot tilt, and a cable sheath is prevented from being punctured by friction. The braided shielding layer is formed by braiding copper wires and graphene composite fibers, and the graphene composite fibers can enable the braided shielding layer to form a heat conduction channel which diffuses heat in the axial direction of the cable, so that the heat at the torsion part of the cable is diffused to the two ends of the cable, a cooling effect is achieved, and the fracture probability of the copper wires is reduced. And the torsion resistance of the cable can be improved.

A paddle card includes a printed circuit board (PCB), a shielded cable, and an electromagnetic interference (EM) shield. The PCB includes a first metal layer on a top surface of the PCB, a second metal layer within the PCB, and a cavity in the top surface of the PC. The cavity exposes the second metal layer. The first metal layer includes a first ground pad. The second metal layer includes a signal pad located within the cavity. The shielded cable includes a signal conductor coupled to the first signal pad. The EMI shield is coupled to the ground pad and covers the cavity.

The invention relates to the field of high polymer materials, and particularly discloses a power shielding cable insulation protection layer material for a top drive and a preparation method of the power shielding cable insulation protection layer material. The insulating protective layer material comprises the following raw materials in parts by weight: 100 parts of polyether type thermoplastic polyurethane elastomer; 12 to 15 parts of an ethylene-vinyl acetate copolymer; 5-8 parts of a compatilizer; 2-4 parts of an antioxidant; 0.3 to 0.7 part of a lubricant; 14 parts of a halogen-free flame retardant; 1-2 parts of an anti-hydrolysis agent; 4 to 6 parts of basalt fiber; and 6-9 parts of a filler. The preparation method comprises the following steps: preparing the raw materials according to the ratio, and pretreating the raw materials; the raw materials are mixed, extruded and granulated to obtain the insulating protective layer material. The insulating protective layer material has the advantage of being excellent in low temperature resistance.

The invention relates to the technical field of cables, in particular to a computer shielding cable which comprises a main cable core and a plurality of auxiliary cable cores, the auxiliary cable cores are evenly distributed around the main cable core, each auxiliary cable core is sleeved with a first split-screen layer, the main cable core is sleeved with a second split-screen layer, and the first split-screen layers and the second split-screen layers are used for shielding signals. The first split screen layer and the second split screen layer are both of a polygonal corrugated pipe structure, a gap is reserved between the edge of the first split screen layer and the surface of the corresponding auxiliary cable core, a gap is reserved between each edge of the second split screen layer and the surface of the main cable core, and the gaps are used for allowing a cooling medium to pass through. The first split-screen layer of the tubular structure can improve the shielding effect of the auxiliary cable core, the second split-screen layer of the tubular structure can improve the shielding effect of the main cable core, and meanwhile, the polygonal first split-screen layer and the polygonal second split-screen layer enable a cooling medium to pass through the surfaces of the main cable core and the auxiliary cable core, so that the main cable core and the auxiliary cable core can better dissipate heat.

The invention relates to the technical field of cables, in particular to a shielded cable which comprises a cable body and an electric connector installed at the head end of the cable body. The cable sequentially comprises a mounting wire, a wave-proof sleeve and an alkali-free glass fiber sleeve from inside to outside. Polyimide films are respectively wound at the head end and the tail end of the mounting wire, and a first layer of fiber wire is bound on the polyimide films; the polyimide film and the first layer of fiber line are positioned between the mounting line and the wave-proof sleeve; the head end and the tail end of the anti-wave sleeve are respectively sleeved with a first polytetrafluoroethylene tube, the anti-wave sleeve is lapped on the peripheral surfaces of the first polytetrafluoroethylene tubes after being flanged, a second layer of fiber wires is bound at the flanged position of the anti-wave sleeve, and the second layer of fiber wires are wrapped by the alkali-free glass fiber sleeve; and third layers of fiber wires are bound at the head end and the tail end of the alkali-free glass fiber sleeve respectively. And a layered binding mode is adopted, so that the installation wire, the wave-proof sleeve and the alkali-free glass fiber sleeve are effectively prevented from loosening and sliding off, and the stability of the cable is improved.

The invention discloses an elastic composite shielding cable for a ship and a preparation process thereof, and aims to solve the problems of poor environmental adaptability, low shielding effectiveness, insufficient elasticity and unstable process of an existing ship cable. The cable sequentially comprises a conductor layer, an insulating layer, a composite shielding layer and a sheath layer from inside to outside, wherein the conductor layer is formed by twisting a plurality of strands of superfine tinned oxygen-free annealed copper wires, and two 1500D aromatic polyamide fiber elastic cores are arranged in the center of the conductor layer; the insulating layer is made of ethylene propylene rubber or thermoplastic elastomer, and the dielectric constant is not more than 3.0; the composite shielding layer is of a double-layer structure of aluminum-plastic composite tape wrapping and tinned copper wire weaving, and the shielding effectiveness of the X wave band is larger than or equal to 30 dB. The sheath layer is of a chloroprene rubber or polyurethane double-layer structure, tests such as C5-M-grade salt mist are carried out, the preparation process comprises the steps of conductor twisting, insulation extrusion, composite shielding forming and the like, various parameters are accurately controlled, the bending radius of the cable is smaller than or equal to 6D, and the cable is stable in performance after being repeatedly bent for 1000 times, low in smoke, halogen-free, flame-retardant, adaptive to severe environments of ships, stable in process and high in reliability. And reliable operation of ship equipment can be ensured.

The invention provides a shielding cable and application thereof, the shielding cable comprises an insulation wire group and a composite shielding layer wrapping the insulation wire group, the composite shielding layer comprises a conductive metal belt layer and an elastic conductive composite material layer wrapping the conductive metal belt layer through a hot pressing composite technology, a nanoscale conductive layer is arranged on the surface of the conductive metal belt layer; the elastic conductive composite material layer comprises a polymer matrix and a nano conductive material dispersed in the polymer matrix; through collaborative design of the conductive metal belt layer and the elastic conductive composite material layer, high-frequency shielding performance breakthrough is realized, SE attenuation rate after damp-heat aging is reduced, mechanical reliability is improved, conductivity, shielding performance, mechanical strength and environmental adaptability of the cable are comprehensively improved, the service life of the cable is prolonged, and the service life of the cable is prolonged. And the maintenance cost is reduced.

The invention discloses an intelligent security and protection system based on Internet of Things, which comprises an intelligent comprehensive wiring subsystem, an intelligent security and protection terminal group, an intelligent central management system and an emergency guarantee module, and is characterized in that the intelligent comprehensive wiring subsystem comprises a transmission link and a distributed sensing line, the transmission link is used for two-way transmission of security and protection data, and the distributed sensing line is used for sensing the security and protection data; the distributed sensing circuit is used for monitoring a vibration signal in the weak current pipeline; the intelligent security terminal group comprises an edge computing device and a multi-mode identification device, the edge computing device is used for processing sensing data in real time, and the multi-mode identification device is used for collecting biological characteristics and environment information. Physical parameters such as cable vibration, plugging strength, temperature and humidity are monitored in real time, millimeter-level fault positioning and second-level early warning are achieved, a traditional manual inspection mode is abandoned, and a double-link redundancy design is combined with an electromagnetic pulse protection module and shielding cable common bridge deployment.

The invention relates to the technical field of cables, in particular to a composite shielding cable which comprises a plurality of wires used for transmitting signals. The filling layer is used for filling gaps in the cable; the composite shielding layer is used for homogenizing an electric field and isolating external electromagnetic interference; the reinforcing layer is used for improving the mechanical strength of the cable; the outer protective layer is used for enhancing the mechanical property of the cable; the composite shielding layer is of a metal and fiber multi-axial mixed braided structure; the reinforcing layer is formed by weaving ultra-high molecular weight polyethylene fibers and para-aramid fibers. According to the composite shielding cable, the composite shielding layer can reduce the weight and thickness of the cable and realize light weight, and the reinforcing layer can realize high temperature resistance and reduce the cost. Through a double-braided structure of the composite shielding layer and the reinforcing layer, a traditional shielding layer and glass fiber reinforcing structure can be replaced, on the basis of ensuring high shielding performance, the mechanical strength of the cable is effectively improved, and meanwhile, the safety of a cable production and processing environment is ensured.

The invention discloses a high-temperature-resistant double-shielding cable for electric power engineering, and the cable comprises a cable main body which is composed of an inner protection assembly, an outer protection assembly, and an assembly convenient to disassemble. According to the invention, under the arrangement of the wrapping tape, the sub-shielding net and the total shielding net, single-group conductive cores can be shielded and protected independently, multiple groups of conductive cores can be shielded and protected intensively, electromagnetic interference can be reduced, electromagnetic compatibility can be improved, signal leakage can be prevented, and cable reliability can be enhanced through double-layer shielding protection, and under the arrangement of the easy-to-tear opening, the convenient-to-tear opening and the ribs, the cable can be protected from being damaged. When the cable is used, a user can easily strip the outer sheath of the part, and then take down the annular structure formed by the four ribs layer by layer, so that the armor layer can be easily stripped, the user does not need to strip the outer sheath and the armor layer by using tools such as a cutter and the like, the damage to the internal structure of the cable main body is avoided, and the service life of the cable main body is prolonged. And meanwhile, the plurality of groups of easy-to-tear openings and convenient-to-tear openings are uniformly distributed, so that the damaged part of the cable main body can be conveniently replaced.

The invention discloses a joint active noise reduction device and an active noise reduction method, and relates to the technical field of active noise reduction, the joint active noise reduction device comprises a joint shell part, and the joint shell part is fixedly provided with a vibration monitoring module through strong glue or a strong magnetic block; a feedback adjusting module, an information processing and analyzing module and an active noise reduction executing module are arranged on a shell of the joint, and the output end of the vibration monitoring module and the output end of the feedback adjusting module are electrically connected with the input end of the information processing and analyzing module through shielding cables. The output end of the information processing and analysis module is electrically connected with the input end of the active noise reduction execution module through a shielding cable, the device is provided with the active noise reduction execution module and the vibration monitoring module to intervene vibration and noise of the joint, noise generation can be reduced from the source, and compared with a traditional passive noise reduction method, the noise reduction effect is remarkably improved.

The utility model relates to the technical field of wires and cables, in particular to a flame-retardant B1-level fire-resistant composite shielding cable, which comprises a plurality of oxygen-free copper stranded wire cores. The flame-retardant filling layer is filled among the plurality of oxygen-free copper stranded wire cores and is wrapped by the wrapping layer to form a circular cable core; the composite shielding layer coats the outer side surface of the cable core; and the outer sheath is extruded on the outer side surface of the composite shielding layer. Each oxygen-free copper stranded wire core comprises a conductor which is formed by mutually stranding a plurality of strands of wires and has a circular cross section, the conductor is coated with an insulation shielding protection layer, and a conductive filling layer is filled between the conductor and the insulation shielding protection layer and is used for filling gaps generated on the surface of the conductor and between the conductor and the insulation shielding protection layer. Through the design of the utility model, the electric field on the outer surface of the conductor can be homogenized, the partial discharge of the conductor and the insulation caused by the unsmooth surface of the conductor and the air gap generated by the twisting of the wire core can be avoided, and the voltage-resistant and torsion-resistant performance of the cable can be provided.

The invention relates to the technical field of aero-engine high-temperature and high-pressure testing, and particularly discloses a double-working-condition high-temperature-resistant total temperature sensing part which is suitable for a cooling-free working condition and a cooling working condition and comprises a shell, a lead device, a mounting base and a supporting framework. The shell comprises a front test piece and a rear protective sleeve which are formed by integrally weaving a ceramic matrix composite material; the windward side of the front test piece is semi-cylindrical, a temperature taking cavity is formed in the front test piece, an air leakage hole is formed in the outer wall, and a thermocouple is mounted in the temperature taking cavity; the lead device comprises a ceramic tube, a lead tube and a shielding cable accessory; the front test piece and the rear protective sleeve are connected by the support framework through a stepped combined groove, and a bent water cooling pipeline is formed in the support framework; and a cavity between the supporting framework and the front test piece is filled and sealed by high-temperature cement. According to the invention, short-time high-temperature measurement can be realized under a non-cooling condition, and long-time stable total temperature acquisition capability can be obtained under a cooling condition, so that structural reliability and temperature measurement precision in an extreme gas environment are both considered.

The invention discloses a shielded cable electricity testing method based on ground loop impedance potential lifting, and relates to the technical field of measurement. The electroscope comprises an electricity testing step, an induction electrode on the cambered surface of the electroscope is used for obtaining induced electricity, a broadband direct sampling framework is formed on the physical level, and broadband direct sampling of millivolt-level power frequency displacement current characteristics is achieved. Based on a variational mode decomposition-Duffing oscillator fusion weak signal extraction algorithm, a variational mode decomposition algorithm is utilized to adaptively strip broadband noise and higher harmonics, a reconstructed signal is subjected to scale normalization and then introduced into a critical chaotic state Duffing oscillator algorithm, phase transition of a phase track from a chaotic attractor to a large-scale limit cycle is monitored, and a weak signal is extracted. A non-linear dynamic weak signal extraction algorithm is formed on the algorithm level, and weak power frequency features masked by strong noise are accurately recognized; a broadband direct acquisition framework and a weak signal extraction algorithm form a dual detection framework, and a quasi-induction electric signal is detected and judged in the live part verification process of the shielded cable.

This utility model relates to the field of novel power battery pack technology, specifically to a wireless display system for power batteries. It includes a power battery pack, a housing, and a display screen. The power battery pack contains a power distribution unit for collecting battery status data. The housing has a built-in wireless module that connects to the power distribution unit via a wiring harness to achieve wireless data transmission. The display screen communicates wirelessly with the wireless module and has a built-in independent power supply unit to ensure that key parameters can still be displayed even when power is off. This utility model solves the problems of easy breakage and signal instability in traditional wired connections in dynamic scenarios through wireless transmission technology. Simultaneously, the use of partition isolation and shielded cable design effectively reduces electromagnetic interference and improves data acquisition accuracy. It is suitable for scenarios requiring real-time battery status monitoring, such as new energy vehicles and construction machinery, and can significantly improve the safety and stability of power battery monitoring.

The invention provides a design method of a separated miniature magnetic probe of a fluxgate sensor. The design method comprises the following steps: dividing the fluxgate sensor into two independent structural units, namely a magnetic probe module and a signal processing module; the magnetic probe module adopts a #-shaped magnetic probe mounting base made of a non-magnetic material; x-axis, Y-axis and Z-axis magnetic field coils are installed on the base, and each axis is composed of two coils; the magnetic probe voltage signal adapter plate is embedded into the magnetic probe base so as to reduce the overall size; and the magnetic probe module is connected with the signal processing module through a shielding cable to realize signal transmission. According to the scheme, the magnetic probe module and the signal processing module of the fluxgate sensor are separated, the overall size is greatly reduced, and the application requirements of miniaturization and light weight are met.