1309 results about "Coaxial cable" patented technology

The invention relates to the technical field of radio frequency coaxial cable manufacturing, in particular to a wrapping method and system for manufacturing a radio frequency coaxial cable, and the method comprises the steps: controlling a take-up frame to pull a to-be-wrapped body made of an inner conductor and an insulating layer to an initial wrapping position at a constant speed; starting wrapping equipment to be matched with the take-up frame to wind a metal belt in the wrapping equipment onto the to-be-wrapped body according to a preset wrapping angle from the initial wrapping position so as to carry out wrapping test on the to-be-wrapped body; collecting the diameter of the to-be-wrapped body wound with the metal belt in the wrapping test; determining the surface wrapping state of the to-be-wrapped body according to the diameter; and determining a wrapping processing mode based on the surface wrapping state, and performing actual wrapping on the to-be-wrapped body according to the wrapping processing mode to form an outer conductor layer. According to the invention, signals are prevented from leaking between the metal tape and the to-be-lapped body, and the signal transmission efficiency is improved.

The invention discloses a radio frequency electromagnetic energy explosion testing device and method. The device comprises a closed gas cavity, a testing cable, a linear driving mechanism and a processing circuit. The airtight gas cavity is filled with explosive gas. The test cable comprises an inner conductor and an outer conductor, the outer conductor is coaxially arranged around the inner conductor, the inner conductor comprises a first inner conductor and a second inner conductor which are oppositely arranged in the axial direction, the end, away from the second inner conductor, of the first inner conductor is configured to receive radio frequency electromagnetic energy, and the power of the radio frequency electromagnetic energy tends to be increased. And the linear driving mechanism is connected with one end, far away from the first inner conductor, of the second inner conductor, and is configured to drive the second inner conductor to periodically reciprocate along the axial direction, so that the second inner conductor and the first inner conductor are periodically disconnected or connected. And the processing circuit is configured to take the power of the radio frequency electromagnetic energy corresponding to gas explosion as a power safety threshold. According to the invention, data support can be provided for safe operation of the coaxial cable in practical application.

The invention relates to the technical field of cable anti-interference, and discloses a high-frequency coaxial cable anti-interference method and device.The method comprises the steps that a radial progressive impedance gradient double-layer shielding structure with an inner shielding layer and an outer shielding layer is constructed, and a triangular supporting frame structure is arranged between the inner shielding layer and the outer shielding layer; an electromagnetic induction probe is installed on the triangular supporting frame structure, and differential interference signals between the inner shielding layer and the outer shielding layer are collected; performing time-frequency domain conjoint analysis on the differential interference signal to obtain an interference source feature mapping map; and performing multi-mode interference identification and suppression according to the interference source characteristic mapping map to generate an interference offset signal, and performing real-time elimination and feedback on electromagnetic interference in the inner shielding layer and the outer shielding layer based on the interference offset signal to obtain an interference offset feedback effect. And signal reflection and crosstalk among the structures of all layers in the cable are effectively compensated.

The invention discloses a line buckling device for mobile phone line installation, and relates to the technical field of mobile phone assembly equipment, and the line buckling device comprises a support main body, and a feeding mechanism, a coaxial line carrying mechanism, a mobile phone shell conveying mechanism, a coaxial line adjusting mechanism, a coaxial line buckling mechanism and a transfer mechanism which are arranged on the support main body, the mobile phone shell with the wire clamping groove is stopped after being conveyed forwards to a corresponding position by the mobile phone shell conveying mechanism; meanwhile, the material clamping jaw clamps the coaxial line in the material hopper and puts the coaxial line into the belt conveying mechanism, then the coaxial line carrying clamping jaw clamps the coaxial line on the belt conveying mechanism and sends the coaxial line into the coaxial line adjusting mechanism, and then the coaxial line buckling mechanism clamps the two ends of the adjusted coaxial line and installs the coaxial line in a mobile phone shell with a line clamping groove. And finally, the mobile phone shell provided with the coaxial line is transferred to the next machining step through the transferring mechanism. Compared with the mode that the two ends of the coaxial line are manually buckled into the line clamping grooves in the mobile phone shell, the working efficiency can be improved.

The invention belongs to the technical field of cable processing, and relates to a preparation method and application of a flexible superconducting coaxial cable outer conductor. The preparation method comprises the following steps: mixing Nb powder and Ti powder by adopting a vibrating ball mill to prepare NbTi composite powder; a substrate of laser powder bed melting equipment is preheated, the NbTi composite powder is spread on the substrate of the laser powder bed melting equipment, a melting powder layer is scanned through the laser powder bed melting technology, a three-dimensional communicated grid structure is formed through interlayer staggered scanning, finally, the NbTi net-shaped alloy pipe is placed in a strong acid solution to be soaked for a short time, redundant metal powder is removed, and the NbTi net-shaped alloy pipe is obtained. And finally, the preparation of the flexible superconducting coaxial cable outer conductor for the quantum computer is realized.

A coaxial connector device includes: a signal contact member; a signal contact member; a ground contact member to which a ground potential is applied; and a conductive member including a rear ground connection portion that is connected to the ground contact member, and a front ground connection portion that is connected to a ground contact portion of a mating connector device. When viewed in a direction of fitting to the mating connector device, the front ground connection portion overlaps at least a part of a signal line including a center conductor of a coaxial cable and the signal contact member, and at least a part of a signal line including a center conductor of a coaxial cable and the signal contact member.

The invention discloses a segmented slot design method and system of a leaky coaxial cable and a storage medium. The method comprises the following steps: constructing a performance fitting formula of the leaky coaxial cable according to segmented slot state parameters; and calculating the coupling loss of each slotted hole segmented structure on the leaky coaxial cable according to a performance fitting formula and a system loss threshold. And calculating corresponding segmented slot state parameters and transmission attenuation according to the coupling loss of each slot segmented structure. And calculating an expected size parameter of the leaky coaxial cable according to the segmented slotted hole state parameter and the transmission attenuation of each slotted hole segmented structure. According to the leaky coaxial cable, the maximum value and the minimum value of the system loss are limited in a relatively small expected value, so that the system loss curve tends to be in a uniform and horizontal state, and the system loss of the leaky coaxial cable reaches a relatively good state.

A female coaxial terminal includes an inner conductor, an insulator sleeved on the outer side of the inner conductor, and an outer conductor. The outer conductor comprises a first body and multiple elastic clamping arms. The first body is sleeved on the outer side of the insulator, spaced apart from it, and features a series of circumferentially arranged windows. Elastic clamping arms are positioned within these windows, extending in a first direction and obliquely towards the insulator. The ends of the clamping arms, opposite the insulator, are connected to the first body. Each clamping arm is equipped with a first protruding structure on the side facing the insulator, providing multi-point protrusions. This configuration enhances the mechanical and electrical connection between the terminal components, ensuring reliable performance in coaxial cable applications.

The invention provides a coaxial cable which comprises an inner conductor, an insulating layer, an outer conductor, a protective layer, a shielding layer and a sheath which are sequentially and coaxially arranged from inside to outside, the insulating layer wraps the outer surface of the inner conductor, the outer conductor wraps the outer surface of the insulating layer, the protective layer wraps the outer surface of the outer conductor, and the shielding layer wraps the outer surface of the outer conductor. The shielding layer wraps the outer surface of the protection layer, the sheath wraps the outer surface of the shielding layer, compared with the prior art, the protection layer is additionally arranged between the outer conductor and the shielding layer, friction between the shielding layer and the outer conductor can be avoided when the coaxial cable is bent, and the coaxial cable can be prevented from being damaged. In other words, friction protection is carried out on the shielding layer through the protection layer, so that the situation that the shielding performance is reduced due to the fact that surface metal of the shielding layer falls off due to friction between the shielding layer and the outer conductor is reduced or even avoided, and the service life of the coaxial cable is prolonged.

The invention provides a temperature-controlled shape memory alloy helical antenna capable of automatically unfolding and a control method, and belongs to the technical field of antennae, and the antenna comprises a helical radiation unit which is made of a shape memory alloy material and is of a multi-circle helical winding structure; the edge of the metal reflection unit is warped upwards to form an annular reflection cavity, and the metal reflection unit is used for enhancing the directivity and radiation gain of the spiral radiation unit; the supporting rod is of a multi-section coaxial nested structure, is vertically mounted in the center of the metal reflection unit and is used for providing stable axial support in the contraction and expansion process of the spiral radiation unit; the dielectric disc is mounted between the supporting rod and the spiral radiation unit; the metal via hole structure penetrates through the dielectric disc and is used for connecting a coaxial cable and the radiation structure to form a complete feed path; and the impedance matching arm structure is used for connecting the feed path and the spiral radiation unit and adjusting the impedance matching relation between the feed path and the spiral radiation unit so as to realize impedance continuity and radio frequency matching.

The embodiment of the invention discloses a signal switching device and a test system. The signal switching device comprises a coaxial cable input port, a decoupling filter circuit and a media signal output port. The input end of the decoupling filter circuit is connected with the coaxial cable input port, and the alternating current output end of the decoupling filter circuit is connected with the media signal output port; the decoupling filter circuit is used for decoupling the received coupling signal to generate an alternating current component and a direct current component, the alternating current component is a media signal, and the direct current component is a power component; and the media signal output port is used for outputting the alternating current component decoupled by the decoupling filter circuit. According to the device provided by the invention, the DC component in the transmission coupling signal in the coaxial cable can be decoupled through the decoupling filter circuit, so that the test process is simplified, and the test cost is reduced.

The invention provides a wide-axial-ratio circularly polarized antenna, and relates to the technical field of antennas, and the antenna comprises a dielectric substrate, and the edge of the dielectric substrate is uniformly provided with metalized via holes; the radiation patch covers the upper surface of the dielectric substrate, and a first circular gap is formed in the middle of the radiation patch; the feed network is located on the lower surface of the dielectric substrate; the metal cover comprises a metal back cavity, the metal cover covers the bottom of the feed network and the bottom of the dielectric substrate, and the feed network is located in the metal back cavity; the radio frequency connector passes through the dielectric substrate and the radiation patch and is welded on the upper surface of the radiation patch; one end of the coaxial cable is connected to the lower end of the radio frequency connector, and the other end of the coaxial cable penetrates through the metal back cavity and is connected with the metal cover; the invention is used for solving the technical problems of low gain, narrow axial ratio beam width, complex design and manufacture and overlarge antenna size of the existing circularly polarized antenna.

The invention discloses a leaky coaxial cable alarm trend analysis system based on multi-modal storage. The system comprises the following steps: S1, confirming a system core target; s2, a multi-mode storage core support; s3, analyzing the alarm trend of the leaky coaxial cable; and S4, outputting a trend analysis result. On the fault early warning level, a 50-meter geofence constructed by a space-time alignment engine and a GPS clock synchronization mechanism are combined with a dual-channel degradation detection model, the false alarm rate is reduced by more than 40%, and subway tunnel false alarm in a typical scene is reduced from 15 times per day to 9 times per day. In an operation and maintenance decision-making level, a fault root cause probability matrix is fused with a multi-source evidence chain to realize three-minute quick positioning, so that the response efficiency of a railway external damage accident is improved, and in a system efficiency level, a cold and hot data layering strategy and radio frequency parameter piecewise linear compression cooperate to reduce the storage requirement, original data is compressed, and the system efficiency is improved. And the edge side lightweight reasoning module realizes 200ms-level real-time detection through a pruning model and I NT8 quantization, and the alarm response delay is reduced.

The invention provides an antenna assembly, an antenna and a base station, the antenna assembly comprises a reflection plate, a phase shifter and at least one radiation unit, the radiation unit and the phase shifter are respectively arranged on the front and back surfaces of the reflection plate, the phase shifter comprises a cavity and a phase shift circuit arranged in the cavity, and the phase shift circuit is arranged in the cavity. The radiation unit comprises a radiation part, a feed core and a first balun structure, the first balun structure penetrates through the reflecting plate to be connected with the radiation part and the cavity, and the feed core is arranged in the first balun structure to be electrically connected with the radiation part and the phase shift circuit. The first balun structure penetrates through the reflecting plate to be connected with a cavity of the phase shifter to realize grounding, the feed core is arranged in the balun, the feed core is directly and electrically connected with the phase shifter and the radiation unit, so that the phase shifter and the radiation unit do not need to be connected through a coaxial cable, and the reflecting plate, the phase shifter and the radiation unit are arranged in a split manner, so that the radiation unit is not required to be connected through a coaxial cable. And production and manufacturing are facilitated.

The invention discloses a multi-mode sensing manipulator system based on flexible electronic skin, an integration process and a test method, and the multi-mode sensing manipulator system based on the flexible electronic skin comprises a flexible electronic skin sensor attached to a manipulator; the flexible electronic skin sensor comprises a flexible sheet and a liquid alloy network arranged in the flexible sheet, the liquid alloy network comprises an SSPP structure and a piezoresistive sensing structure located on the periphery of the SSPP structure, and the SSPP is a simulated surface plasmon; the piezoresistive sensing structure is connected with the signal processing circuit through a flexible wire bar and transmits a piezoresistive signal to the processor; the SSPP structure is connected with the SDR module through a coaxial line and is connected with the processor. According to the multi-mode sensing manipulator system based on the flexible electronic skin, the integration process and the testing method, the functions of multi-dimensional force feedback, substance penetrating type sensing and dynamic curved surface adaptation are achieved.

The invention provides a heavy oil thermal-flow coupling development experimental device and method based on microwave-assisted gravity drainage, and belongs to the field of oil-gas field development. The experimental device comprises a three-dimensional oil reservoir simulation system, a microwave-assisted heating system, a horizontal well injection-production regulation and control system and a multi-field monitoring system; the microwave auxiliary heating system comprises a microwave generation regulation and control system, a microwave transmission system and a shaft integrated microwave radiator, the microwave generation regulation and control system comprises an industrial grade microwave generator, a power regulator and a PLC, and the microwave transmission system comprises a microwave coaxial cable and a microwave waveguide tube bundle; and the microwave generator is continuously connected with the microwave waveguide tube bundle and the shaft integrated microwave radiator. According to the heavy oil thermal-flow coupling development experimental device and method based on microwave-assisted gravity oil drainage, the technical problems that an existing deep heavy oil thermal recovery experimental device cannot reproduce a'thermal-flow-force 'multi-field coupling environment, the microwave heating adaptability is poor, and the experimental scale and the field deviation is large are solved. The heavy oil thermal-flow coupling development experimental device and method based on microwave-assisted gravity oil drainage solve the technical problems that an existing deep heavy oil thermal recovery experimental device cannot reproduce the'thermal-flow-force' multi-field coupling environment.

The invention belongs to the field of satellite mobile communication, and particularly provides a three-frequency-band circularly polarized flexible microstrip antenna and wearable equipment, used radiation patches are superconducting fabrics, a dielectric substrate is made of flexible felt materials and has the overall flexibility characteristic, so that the wearing comfort is ensured, the mode that two layers of radiation patches are stacked is adopted, and the antenna is more flexible. The upper-layer patch is subjected to special treatment such as branch knot loading and slotting to obtain a dual-band right-handed circularly polarized radiation characteristic, the parasitic patch is introduced to the upper surface of the upper-layer dielectric substrate to enhance the axial ratio bandwidth of the upper-layer patch, and the lower-layer patch is subjected to corner cutting treatment to obtain a left-handed circularly polarized radiation characteristic. And the isolation degree between the two ports is enhanced by introducing the metal short-circuit through hole. And the upper-layer patch and the lower-layer patch are fed by using a coaxial cable. Finally, the section of the antenna is only 0.05 lambda0, and the antenna is simple in structure, convenient to manufacture, good in performance and more convenient to wear on a human body, and meets the performance requirements of a Beidou navigation system.

The invention relates to an ultrahigh-temperature-resistant radio-frequency coaxial cable and a manufacturing method thereof. The cable comprises an inner conductor, an insulating foaming layer, a first outer conductor, a glass fiber belt, a silicon dioxide aerogel coating, a second outer conductor, a flame-retardant fireproof layer and a flame-retardant sheath layer which are sequentially arranged from inside to outside, wherein the first outer conductor is provided with a first embossing structure comprising wave crests and wave troughs; the second outer conductor is provided with a second embossing structure comprising wave crests and wave troughs; the positions of wave crests and wave troughs of the first embossed structure are consistent with the positions of corresponding wave crests and wave troughs of the second embossed structure, and air layers are formed between the first embossed structure and the glass fiber belt and between the second embossed structure and the silicon dioxide aerogel coating. According to the invention, the safety and reliability of the cable in extreme environments such as fire disasters and the like are remarkably improved, and communication interruption of the radio frequency coaxial cable in high-temperature environments of fire disasters is avoided.

A wall building system includes panels for walls, floors, ceilings, roofs, eaves, and lofts that positively couple together via one or more couplers. The panels may include an insulating core. The one or more couplers incorporate features for receiving plumbing, vents, drains, electrical, coax, CAT5, HVAC, and any other utilities or technology. The panels are designed such that the utilities are concealed until an electrical outlet, drain or water is required, at which time the panel is cut to expose the one or more couplers, which are subsequently cut to reveal a hollow cavity within. The system is aesthetically pleasing and reduces construction time considerably. The system is also extremely energy efficient, fireproof, soundproof, insect proof, virus proof, resists hurricane force winds, is EMP proof, fallout proof, can support a heavy snow load, and is faster to build with and structurally stronger than other construction methods.

The invention discloses a shield tunnel ground penetrating radar one-transmitting-multi-receiving antenna array advanced detection system, which comprises a terminal processor and a one-transmitting-multi-receiving antenna array, the terminal processor is connected with the one-transmitting-multi-receiving antenna array through a coaxial cable, the one-transmitting-multi-receiving antenna array comprises a transmitting antenna and a plurality of receiving antennas, and the transmitting antenna is connected with the receiving antennas. The shield cutter heads are arranged in the radial direction of the shield cutter head, are fixed on the same radius of the shield cutter head and cover the radius of the whole shield cutter head; the shield cutterhead rotates to cut a front soil body, the terminal processor controls the one-transmitting-multiple-receiving antenna array to synchronously carry out advanced detection, the one-transmitting-multiple-receiving antenna array rotates along with the shield cutterhead to detect a circle, the transmitting antennas radiate electromagnetic waves once at fixed angle intervals, and the multiple receiving antennas record reflected electromagnetic echo signals of a front stratum once at the same time. And the one-transmitting multi-receiving antenna array follows the shield tunneling machine to gradually tunnel so as to detect obstacles in the whole tunnel excavation section. The method has the advantages of large detection range, high detection efficiency and clear detection result.

The invention relates to the technical field of cables, in particular to an ultrahigh-frequency low-loss longitudinal-hole PTFE insulated coaxial cable which comprises a composite conductive bar, a silver-plated copper flat belt, a PTFE insulating layer, a corrugated aluminum belt shielding layer and a sheath layer which are sequentially connected in a sleeved mode from inside to outside. Four identical longitudinal holes are formed in the PTFE insulating layer, and each longitudinal hole penetrates through the PTFE insulating layer along the extension direction of the PTFE insulating layer; each longitudinal hole is in a crescent shape; the longitudinal holes are distributed at equal intervals in the circumferential direction of the PTFE insulating layer; and each longitudinal hole is formed in the edge area, close to the outer ring, of the PTFE insulating layer. According to the cable, the transmission efficiency is improved by reducing signal attenuation, the service life is prolonged by improving the temperature resistance level, the inner conductor and the outer conductor are structurally adjusted to ensure that the cable has certain flexibility, and energy conservation and environmental protection are achieved by reducing the use amount of rare metal.

The invention discloses a resistivity static sounding in-situ test probe for evaluating unfrozen water content and ice content of frozen soil and a working method thereof.The test probe comprises a sounding probe body and a probe rod which are vertically distributed, the sounding probe body is located at the bottom end of the probe rod, and a coaxial cable is arranged in the probe rod in a penetrating mode; a broadband signal generator, an embedded data processor, an inclinometer, an annular electrode array, a temperature sensor, a pressure measuring assembly and a friction cylinder are sequentially arranged in the probe rod from top to bottom. According to the invention, resistivity inversion calculation and temperature compensation calculation are carried out through the embedded data processor, and end resistance, friction resistance, inclination, temperature, unfrozen water content, ice content and thaw collapse coefficient are output; according to the method, mechanical parameters and electrical parameters are synchronously obtained, multi-physical field coupling analysis is combined, the frozen soil thaw collapse deformation in-situ testing method based on broadband resistivity static sounding is constructed, and the defect that the content of unfrozen water and the content of ice in a soil body cannot be detected through an existing static sounding technology in China is overcome.

Coaxial connectors contain sensitive components that can be easily damaged. If they are damaged, there is a risk that the required high data rates or high signal quality cannot be maintained. The aim of the invention is therefore to provide an assembly for connecting a coaxial cable that is less easily damaged.The aim is achieved by a connector assembly (1) for coaxial plug connections, comprising a housing (6) having a plug opening (22) which passes through the housing (6) in a plug-in direction (4); comprising a connector (2) having a coaxial connector (24) which can be plugged together with a mating connector (56) in a plug-in direction (4), which projects through the plug opening (22) and is displaceable in the connector opening (22) transversely to the plug-in direction (4) relative to the housing (6); and comprising a clamping member (8) which can be transferred into a holding position (39) in which the connector (2) is frictionally fixed to the housing (6). This displaceability allows a force-free connection when transmitting audio and video signals and in laboratory technology, which prevents damage.

The radio frequency coaxial cable comprises a sheath and a shielding layer wrapped on the inner surface of the sheath, the shielding layer and a cable core in the center are coaxially distributed, an insulating layer used for wrapping the cable core is contained in the cable core and the shielding layer, and through grooves distributed in the axial direction are further formed in the insulating layer. Wherein the through groove is used for forming semi-air insulation in the cable, and the through groove is also used for circulating air flow for operation cooling of the cable. According to the radio frequency coaxial cable, the related structure of the insulating layer is redesigned, on the basis of guaranteeing the supporting performance, the overall weight of the cable is effectively reduced, insulation is improved, a better cooling effect is achieved at the same time, and compared with the prior art, the radio frequency coaxial cable is more suitable for a high-load operation environment and an operation environment with higher external temperature.

The invention discloses a photoelectric integrated landslide slip monitoring system and method. The system comprises a photoelectric integrated cable used for being lowered into a monitoring drill hole drilled in a landslide mass, and a heavy hammer facilitating the photoelectric integrated cable to be kept vertical in the lowering process is hung at the bottom of the photoelectric integrated cable. The photoelectric integrated cable comprises a copper inner conductor, an insulating layer, an aluminum tube and an outer protective layer which are coaxially arranged from inside to outside and form a coaxial cable, a strain optical fiber and a temperature measuring optical fiber are arranged in the insulating layer in parallel and separated from the inner conductor, the inner conductor, the strain optical fiber and the temperature measuring optical fiber are fixed through insulating filler filled in the insulating layer, the aluminum tube is wrapped outside the insulating layer, and the outer protective layer is wrapped outside the aluminum tube. The aluminum tube is wrapped by an outer protective layer, and cables respectively connected with the inner conductor, the strain optical fiber and the temperature measurement optical fiber are led out from the top of the photoelectric integrated cable and are respectively connected with a TDR channel, an optical fiber strain channel and an optical fiber temperature measurement channel of the multi-channel demodulator. According to the invention, the position and displacement angle information of slippage deformation of the landslide can be accurately obtained, and the method is rapid and accurate.

The invention provides a broadband circularly-polarized metasurface antenna which comprises a first dielectric plate, a second dielectric plate, a metasurface radiator, a sequential feed network, a metal reflecting plate, a coaxial cable, a feed probe and a metal short-circuit needle. The first dielectric plate is arranged above the second dielectric plate in parallel; the metal reflecting plate is printed on the lower surface of the second dielectric plate; the metasurface radiator comprises a square patch printed in the middle of the lower surface of the first dielectric plate, and an inner ring metasurface array, an outer ring metasurface array and a quarter-wavelength branch printed on the upper surface of the first dielectric plate. The broadband circularly polarized metasurface antenna provided by the invention has the working bandwidth of 37.74%, the gain of 6.36-9.28 dBi and good directional radiation performance, and has the advantages of wide broadband, high gain and small size.

The invention discloses a low-temperature safety valve leakage detection device based on electrical capacitance tomography, which comprises a liquid nitrogen storage container, a test container, a low-temperature stop valve, a detected low-temperature safety valve, a constant-temperature water bath device, a flow meter, a water tank, a leakage detection pipeline, a capacitance measurement system and a data acquisition and software system, the capacitance measuring system comprises a plurality of groups of copper electrode plates and a processing module, each group of copper electrode plates comprises two copper electrode plates arranged on two opposite side parts of the water tank, and the copper electrode plates are used for capturing bubbles formed by the low-temperature gas in the cavity and acquiring capacitance signals; and the copper electrode plate is electrically connected with the data acquisition and software system through the lead electrode plate connector and the shielding coaxial cable. Insulation supports are arranged between the water tank and the copper electrode plates, the interior of the water tank is divided into a plurality of cavities, and communication gaps are formed between the adjacent cavities. The invention further discloses a low-temperature safety valve leakage detection method based on electrical capacitance tomography. According to the method, the accuracy and comprehensiveness of calculating the leakage rate of the low-temperature gas are improved.

A coaxial cable seizure assembly includes a stamped conductor with a leaf spring receptacle portion to provide a coaxial cable connection inside an HFC network device, such as an HFC node or amplifier. The stamped conductor portion is stamped from a single piece of metal and is located in an insulator portion. The insulator portion may be located inside a housing of the HFC network device adjacent a coaxial cable port such that the leaf spring receptacle portion is aligned with and receives a coaxial cable center conductor pin of a coaxial cable connected to the port. In one embodiment, a coaxial cable seizure assembly further includes a pin portion formed from the same piece of metal as the leaf spring receptacle. In another embodiment, a PCB-mounted coaxial cable seizure assembly further includes a PCB mounting portion formed from the same piece of metal as the leaf spring receptacle.

The invention provides a temperature-controlled shape memory alloy flexible microstrip antenna capable of automatically unfolding and a working method, and relates to the technical field of communication equipment, and the antenna comprises a plurality of microstrip antenna units, a flexible dielectric substrate, a grounding layer, and a metal via hole structure. Each microstrip antenna unit comprises a radiation patch, and the radiation patch comprises a patch matching layer and a patch radiation layer; the flexible dielectric substrate is arranged between the radiation patches and the grounding layer, the radiation patches of each microstrip antenna unit are arranged on the flexible dielectric substrate at equal intervals, and the grounding layer is located at the bottommost layer and is made of a shape memory alloy material; the metal via hole structure comprises a plurality of metal via holes arranged among the microstrip antenna units, an external coaxial cable penetrates through the metal via holes to connect the flexible dielectric substrate and the grounding layer, and the shape memory alloy material of the grounding layer can be stored at a set first temperature. And the device can be automatically unfolded to recover the original shape at the set second temperature.