218 results about "Shielded cable" patented technology

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.

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 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 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.

A plug contact (11) is connected to one end of a core wire of a flexible shielded cable (4). An insulating plug housing (12) holds the shielded cable (4) and the plug contact (11). A plug shell (13) is fixed to the plug housing (12) and holds the shielded cable (4) together with the plug housing (12). The plug housing (12) includes: a fitting part (50a) that is to be fitted to a receptacle connector and that holds the shielded cable (4) extending in the +Z direction normal to a main surface of a substrate on which the receptacle connector is mounted; and an extension part (50b) that is formed so as to be continuous with the end of the fitting part (50a) farther from the receptacle connector and that holds the shielded cable (4) extending in a second direction (a direction between the +Z direction and the +Y direction) intersecting the +Z direction.

The invention discloses a nanosecond square wave transient impedance tower grounding defect on-line detection method and system. The method comprises the steps that distributed potential sensors are arranged on the periphery of a tower grounding body, and multi-channel synchronous acquisition is established; injecting a rectangular pulse signal into the grounding down lead, and superposing a damping sine component subjected to frequency response compensation; synchronously acquiring voltage and current responses, calculating a transient impedance differential ratio, a total harmonic distortion rate and a wavelet packet energy entropy, and judging a defect type according to a preset threshold value and a weighted fusion criterion; constructing and solving a ground potential field model, and positioning a defect position; the system is composed of a nanosecond square wave generator, a distributed potential sensor, a data acquisition and synchronization module, a signal analysis module and a ground potential tomography module, and sensor signals are subjected to differential transmission through a twisted-pair shielding cable to suppress interference. According to the invention, rapid and accurate identification and positioning of the grounding defect of the tower under the non-power-off condition are realized, the identification rate is high, and the positioning precision is excellent.

This utility model discloses a high-performance shielded cable front connector, belonging to the technical field of cable front connectors. It includes a T-shaped lower housing with a T-shaped upper housing at its upper end. The lower housing has a through groove, and the upper housing has a front connector body on one side. This utility model, through a front connector connection and fixing mechanism, ensures a secure connection between the front connector body and the upper housing. The mechanism includes a connecting ear, a locking block, a fixing component, and a sealing ring. The locking block engages with a groove on the ear plate, and the fixing component utilizes a limiting plate and a spring to quickly fix and release the front connector body. This design not only improves installation and disassembly efficiency but also enhances the sealing performance of the front connector through the cooperation of the sealing ring and the sealing groove, preventing external moisture and dust from entering and ensuring the stability and reliability of signal transmission.

The application provides a high-voltage power distribution system cooperatively controlled with a traction system test bench, comprising: a high-voltage power distribution unit, a high-voltage cable interface device, a low-voltage power supply unit, a high-voltage power supply filter device, a high-voltage cable straight-through device, a host computer and the traction system test bench; the high-voltage power distribution unit and the low-voltage power supply unit are connected by a high-voltage shielded cable assembly for power supply by the traction system test bench; a high-voltage power supply filter device and a high-voltage cable straight-through device are arranged outside the high-voltage cable interface device; the high-voltage power distribution unit is connected with the high-voltage power supply filter device and the high-voltage cable straight-through device through the high-voltage shielded cable assembly for information transmission interaction; the host computer is electrically connected with the low-voltage power supply unit, and the low-voltage power supply unit comprises a PLC intelligent controller and a data acquisition module. The application aims to connect a converter power supply system and a load system, so that the converter simulates the working condition on the vehicle to perform electromagnetic compatibility test in a semi-electromagnetic wave darkroom.

Accessories of a medical device, such as a defibrillator, are described. The accessories reduce delays in treating or monitoring a patient by increasing the efficiency of using, and the ease of use of, the medical device. An adjustable kickstand is movable between a collapsed and extended position to recline the medical device. In the reclined position, a display of the medical device can be more easily viewed by the user. Storage bags can be coupled to the medical device to efficiently store accessories for use with the medical device. The stored accessories can be coupled to the medical device while the accessories are stored within the storage bags. A port guard can protect and shield a connection between a cable and a port of the medical device to prevent the cable (e.g., an ECG cable) from being disconnected from the port of the medical device.

The invention relates to a steel rolling heating furnace pressure detection system and a control method, and belongs to the technical field of steel rolling heating furnace energy saving in the metallurgical industry. According to the technical scheme, firstly, a furnace pressure detection hole is formed in the side wall of the soaking section of the heating furnace, the vertical height of the furnace pressure detection hole is equal to the height of the horizontal line on the side wall of the soaking section and the upper surface of a steel billet in the furnace, the distance between the horizontal direction and a steel outlet of the heating furnace ranges from 500 mm to 1500 mm, a pressure measuring pipe is installed and connected to a micro-pressure transmitter, and the micro-pressure transmitter is connected with a furnace pressure meter through a shielding cable; and then the furnace pressure is adjusted by adopting a method of combining the frequency of a heating furnace flue gas induced draft fan motor and the opening degree of a heating furnace flue gate, so that the pressure of a hearth is controlled to be 5-10 Pa. The device has the beneficial effects that the hearth pressure of the steel rolling heating furnace can be accurately controlled, steel billets at the discharging end of the heating furnace are kept to be surrounded by high-temperature furnace gas, the furnace pressure at the steel billet position at the discharging end is micro-positive pressure, and energy saving of the heating furnace is achieved.

Power electronic device (11) comprising a semiconductor switch (15) and a sensor module (1) which is in thermal contact with the semiconductor switch (15) and has at least one measuring transmitter (2), wherein the sensor module (1) has at least one interference suppression element (3) for reducing interference signals, wherein the sensor module (1) has an input contact (6) and an output contact (7), wherein the measuring transmitter (2) and the interference suppression element (3) are arranged in a parallel circuit (8), wherein the parallel circuit (8) is electrically connected on the one hand to the input contact (6) and on the other hand to the output contact (7), wherein the input contact (6) and the output contact (7) are each designed as an unshielded cable (9).

A shielded electrical cable (1) comprises an electrical cable (10) and a conductive nonwoven tape (20) wrapped around the electrical cable. The conductive nonwoven tape comprises a conductive nonwoven fabric (21) and an adhesive layer (22) located on a surface of the conductive nonwoven fabric and is wound with a winding pitch of t / 3 or more and t / 2 or less to form a wrapped section (L), where t is a width of the conductive nonwoven tape. The adhesive layer is located in a different position from the wrapped section, has an adhesive strength of 2.0 N / 19 mm or more, as measured by an adhesive strength test in accordance with JIS C 2107, a width of t / 10 or more, and a thickness of 0.01 mm or more and not greater than the thickness of the conductive nonwoven fabric.

The utility model provides a super flexible shielding cable, the cable core comprises a central cable core, a first cable core and a second cable core, the first cable core and the second cable core are sequentially arranged outside the central cable core from inside to outside, the first cable core comprises a control signal line unit and a high frequency communication signal line unit, and the control signal line unit and the high frequency communication signal line unit are alternately arranged. The second cable core comprises a plurality of control signal lines, the control signal line unit, the high-frequency communication signal line unit and the control signal lines respectively comprise a tightly-pressed tinned copper wire conductor and a fluoroplastic copolymer insulating layer arranged on the outer side of the tightly-pressed tinned copper wire conductor, and a first tinned copper wire braid layer is arranged on the outer side of the cable core; the cable can effectively transmit large current and high-frequency signals in a high-temperature environment, the ultrahigh shielding rate can effectively block interference of electromagnetic waves, the stability of transmitted signals is ensured, the flexibility of the cable is improved, the cable has good flexibility and fatigue resistance, and the service life of the cable is greatly prolonged.

The application relates to the technical field of shielded cables, in particular to a shielded data transmission cable and a preparation method thereof, which comprises the following steps: drawing a wire core through a wire drawing machine, extruding and shaping an insulating material in a molten state to wrap the outer layer of the wire core to obtain an insulating wire core; gathering multiple insulating wire cores to form a wire harness, and twisting and shaping multiple wire harnesses to obtain a cable core, obtaining stress data of each wire harness and the cable core, calculating the step change interference degree of each stress data in a stress sequence, obtaining the sudden deviation degree of each stress data in the stress sequence, extracting stress abnormal data, correcting each stress abnormal data, obtaining the pointing degree of each pointing wire harness and the gathering degree of the cable core, and adjusting the wrapping belt tension of a wrapping machine in the preparation process of the shielded data transmission cable through the deviation between the pointing degree and the gathering degree, so that the preparation of the shielded data transmission cable is completed. The application can improve the accuracy of adjusting and compensating the wrapping belt tension.

The invention discloses a stable shielding cable connector, which relates to the technical field of conductive connection, has the advantages of increasing the contact area between a shielding layer and a metal part in a shell and forming low-impedance reliable grounding, and has the key points of the technical scheme that the stable shielding cable connector comprises the shell connected with the end part of a shielding cable and a tail sleeve arranged at the tail end of the shell in a sleeving manner, external threads are arranged on the circumferential outer wall of the shell, the tail sleeve is detachably and fixedly connected with the shell through the external threads, and a connecting assembly enabling a shielding layer of the shielding cable to be reliably grounded is arranged between the shell and the tail sleeve.

The utility model discloses a motor cable, which belongs to the technical field of cables and comprises a cable body. The shielding assembly is located in the cable body, and the shielding assembly is located outside the tensile assembly; the tensile component is located in the cable body, and the tensile component is located outside the insulating component; and the insulation assembly is located in the cable body and the insulation assembly is located in the shielding assembly. When electromagnetism in the cable is interfered, enough noise protection can be realized by using the metal foil in a common electromagnetic interference environment through the metal foil and the woven mesh on the cable body. In a relatively severe noise environment, the shielding cable using the woven mesh and the metal foil has relatively strong anti-electromagnetic interference capability, so that the problem of electromagnetic interference on the cable is solved; when the cable is bent, the tension rings on the tensile frame are rotated, and when the tension rings are bent, the tension grooves between the tension rings protect the first cable and the second cable, so that the first cable and the second cable in the cable are prevented from generating cracks when the cable is bent.

A method for providing an electrically conductive layer for a plastic housing, in particular a splice housing for an electromagnetically shielded cable harness, comprises the following steps: a) providing an electrically conductive film and a mold; b) inserting the film into a mould; c) injection molding a plastic into the mold such that the injected plastic is bonded to the conductive film.

Apparatus and associated methods relate to a bond-degradation device for testing EMI susceptibility and / or emission suppression of an electrical control system that includes a shielded cable assembly. The bond-degradation device includes a resistive annulus configured to be interposed between normally-connected first and second shielded connectors of the electrical control system. The resistive annulus introduces a resistance between shields of the normally-connected first and second shielded connectors, thereby compromising integrity of the shielding of conductive wires within the shielding of the shielded cable assembly by increasing loop resistance of the shielding.

This invention discloses a high-temperature resistant pre-coated conductor thin-strip shielded cable, relating to the field of cable manufacturing technology. Several inner support rings are evenly spaced around the outer shielding strip, with three adjacent inner support rings connected by two elliptical rings. An insulating silicone is embedded between two adjacent outer shielding strips, with an inner cooling tube running through the silicone. An insulating sleeve is fitted over the outer shielding strip, and a protective pad is embedded in the gap between the insulating sleeve and the outer shielding strip. A storage bladder is embedded inside the protective pad, and the storage bladder is filled with an anti-collision body. Several aluminum foil sleeves are fitted over the outer side of the insulating sleeve. In this invention, when the cable is subjected to external impact, damage to the conductor, inner shielding strip, and outer shielding strip is avoided. During cable use, the conductor avoids overheating and hindering power transmission, resulting in good economic benefits. Furthermore, in the event of a fire, the two components work together to hinder the spread of fire from four directions, significantly reducing economic losses.

The utility model discloses a high-voltage shielding cable connector of a new energy automobile, which comprises a double-end wiring terminal and a conductor used for connecting two sections of high-voltage shielding cables, the double-end wiring terminal comprises a terminal main body and a locking mechanism, the locking mechanism comprises a locking bolt and a movable pressing block, and the cable conductor is fixedly connected with the terminal main body through the locking bolt; the insulator is arranged outside the double-end wiring terminal, and the insulator is made of a ceramic material; the shielding piece sleeves the insulator and is used for connecting a shielding layer of the cable, the shielding piece comprises a shielding ring connecting mechanism and a shielding shell, and the shielding piece and the cable shielding layer are locked through a bolt; the detachable insulating shell comprises a butt-joint terminal insulating shell and a shielding layer insulating shell, and the butt-joint terminal insulating shell and the shielding layer insulating shell are locked by adopting an embedded buckle; the inner wall of the detachable insulating shell is provided with PVC insulating flexible glue. According to the utility model, the problems of difficulty in cable alignment, poor contact, poor shielding effect and the like of the existing connector during butt joint of high-voltage shielding cables are solved.

The utility model discloses a longitudinal watertight rubber sheath composite shielding cable resistant to water pressure of 6.75 MPa. The longitudinal watertight rubber sheath composite shielding cable comprises a plurality of cable cores, and an inner shielding layer, an inner sheath layer, an outer shielding layer and an outer protection layer which are sequentially sleeved outside the cable cores from inside to outside, and a watertight layer is arranged between the cable cores and the inner shielding layer; the inner shielding layer adopts the glass fiber layer and the first aluminum foil layer to realize shielding without affecting the bending performance of the cable, the outer shielding layer adopts the copper wire layer, the reinforcing layer and the second aluminum foil layer to further realize shielding without affecting the bending performance of the cable, and the reinforcing layer is arranged and adopts silica gel, so that the bending performance of the cable is not affected. The silica gel has flexibility and does not influence the bending performance of the cable, and when the cable is bent, the pattern surface arranged on the inner wall of the reinforcing layer is attached to the copper wire layer, so that the influence of a gap on the shielding performance when the copper wire layer is bent is inhibited to a certain extent.

The present disclosure relates to a joint cable, particularly a high-voltage joint cable, and to a joint connection method of a shielded cable, particularly a high-voltage shielded cable. The joint cable, particularly the high-voltage joint cable, is provided with a first shielded electric wire having at least one conductor and a first shield layer of which an outer surface is covered with a first outer sheath, a second shielded electric wire having at least one conductor and a second shield layer of which an outer surface is covered with a second outer sheath, a third shielded electric wire having at least one conductor and a third shield layer of which an outer surface is covered with a third outer sheath, the first conductor being electrically connected to the second conductor and the third conductor, and a flexible shield tube having a first portion and a second portion which is adjacent to or separated from the first portion in a length direction, the first portion of the flexible shield tube being arranged so as to substantially surround an exposed portion of the first shielded electric wire and electrically connected to the first shield layer, and the second portion of the flexible shield tube being arranged so as to substantially surround both of an exposed portion of the second shielded electric wire and an exposed portion of the third shielded electric wire and electrically connected to the second shield layer and the third shield layer.

The utility model discloses a cutting device for a flat shielding cable and a cable structure thereof, relates to the technical field of cable manufacturing, and has the advantage that after the cable is wound to a preset length, a cutter can cut off the cable without the need of designing the length, and the key points of the technical scheme are as follows: the cutting device comprises a cutting table which is positioned on one side of a winding roller and is positioned on the ground; the length of the cutting table is distributed in the length direction of the winding roller, the length of the winding roller and the length of the cutting table are distributed in the horizontal direction, the cutting table is provided with an adjusting piece enabling a cable to move in a reciprocating mode in the length direction of the winding roller, and the adjusting piece is provided with a cutting piece.

There are provided a duplex twisted shielded cable and wire harness, the duplex twisted shielded cable including; two insulated wires that are twisted together, each having a conductor and an insulator covering the conductor; a metal foil shield provided around the two insulated wires; a metal braid provided on an outer periphery of the metal foil shield; and a sheath provided on an outer periphery of the metal braid. The metal foil shield includes a PET film layer and a metal layer. The PET film layer has a thickness of 20 μm or less, an ellipticity of the PET film layer is set to 0.75 or more and 0.90 or less, and the metal foil shield is longitudinally attached to the two insulated wires.

This invention discloses a simulation-based method and system for handling electromagnetic interference in motor controllers, belonging to the field of electromagnetic compatibility testing and simulation technology. By constructing a test environment structural model including a test bench, artificial power network, shielded cables, current probes, the motor controller body, and the motor load using an electromagnetic simulation platform, electromagnetic field simulation calculations are performed to extract structural parasitic parameters and convert them into an equivalent circuit model. The equivalent circuit model is integrated into the main circuit simulation model to form a field-circuit coupled simulation model, and preliminary conducted emission simulation results are obtained. A current probe model is established, and the transfer impedance calibration factor is calculated. The preliminary simulation results are coupled and calibrated to obtain high-precision conducted emission simulation results. Based on the calibrated simulation results, the suppression effects of different interference suppression schemes are configured and evaluated, and the optimal suppression scheme is selected. The proposed scheme significantly improves the simulation accuracy of the conducted emission current method.

This invention discloses a flame-retardant high-shield cable material and its preparation method, relating to the field of cable material technology. The cable material, by weight, comprises a matrix resin, silicone oil-modified aminated multi-walled carbon nanotubes, a composite flame-retardant system, a composite shielding system, a coupling agent, a lubricant, an antioxidant, a flame-retardant and smoke-suppressing synergist, and octavinyl cage-like polysilsesquioxane, among other raw materials. The matrix resin is a compound of ethylene-octene copolymer, POE-g-MAH, and polyborosilazane. The composite flame-retardant system and the composite shielding system synergistically enhance each other's effects. The preparation method involves mixing the raw materials, then melt-blending, granulating, and drying them using a twin-screw extruder to obtain the finished product. This cable material possesses both high flame-retardant and high shielding properties, solving the problem of single cable materials being unable to simultaneously achieve both flame-retardant and shielding performance. It is suitable for various cable applications with high requirements for shielding and flame retardancy, and has strong practicality.