1316 results about "Coaxial line" patented technology

The invention discloses an induced water-guided laser generating device. A high-pressure water cavity is formed in a shell of a water-optical coupler of the induced water-guided laser generating device; a light-transmitting window is formed in the middle of a top plate of the shell and used for laser incidence. A water inlet is formed in the side wall of the shell and used for injecting water into the high-pressure water cavity. An induction channel coaxial with the light-transmitting window is formed in a bottom plate of the shell; the induction channel is in a frustum shape which is gradually reduced from top to bottom; the inner wall of the induction channel is plated with a mirror reflection film; high-pressure water in the high-pressure water cavity is jetted out from the lower end of the induction channel to form micro-jet, and the periphery of the micro-jet is surrounded by gas to form a water-gas interface. According to the induction type water-guided laser generating device, water-guided laser microjet with the outer diameter smaller than the diameter of a laser spot can be manufactured, the alignment requirement of the laser spot and an induction channel can be greatly lowered, and the water-guided laser coupling efficiency can be improved.

According to the broadband single-layer dual-polarization microstrip antenna, a radiation patch and a short-circuit metal column are combined to form an EBG structure, and the working bandwidth is greatly improved. And the two ports are connected with the circular parasitic patch through the coaxial line, so that radiation energy coupling is realized, and impedance matching is improved. And two ports are orthogonally arranged, so that the isolation is improved. The four slits suppress the coupling current between the adjacent antenna units, an additional decoupling structure is not needed, the polarization purity is ensured, and the cross polarization is less than-15dB. The antenna is compact in structure, a single-layer substrate is adopted, the profile of the antenna is 0.08 working wavelength, miniaturization, dual polarization, broadband and high isolation are achieved, processing is simple, the antenna works in the 16.7 GHz Ku frequency band, and the-10 dB impedance bandwidth is about 16%. According to the invention, a miniaturized, dual-polarized, broadband, high-isolation and monopole-like radiation mode is realized, the radiation mode is stable, and the antenna can be used as a phased array unit.

The invention discloses a UPS (Uninterrupted Power Supply) parallel operation redundancy system and a control method thereof, and relates to the field of UPS, the UPS parallel operation redundancy system comprises a plurality of groups of UPS modules, a plurality of groups of UPS module parallel links, a monitoring unit, a control unit and a switching unit; voltage sampling points of each group of UPS modules are connected with the AD conversion module of the monitoring unit through a double-shielding coaxial line, the control unit is connected with the monitoring unit through a PCIe bus, and the switching unit receives signals output by the control unit through an optical fiber channel. Through a multi-factor coupling mechanism of the dynamic redundancy capacity distribution model, the temperature correction index and the time attenuation factor are deeply fused, real-time dynamic optimization of UPS module load distribution is realized, and performance attenuation and local overload in a high-temperature environment are effectively inhibited; and through the combined criterion of the historical fault integral and the instantaneous over-threshold, the cooperative adaptive capacity of the system to the progressive fault and the sudden load fluctuation is improved.

The invention discloses a power battery thermal runaway fault detection method and system based on multi-source parameters, and belongs to the technical field of battery management, and the method comprises the steps: inputting a high-frequency signal generated by a signal generator to a positive electrode feed point of a battery cell, connecting a coaxial line to a positive electrode, and grounding a negative electrode to form a grounding loop; the collected dendritic crystal reflection signals are analyzed, a quantitative correlation model is established, the growth condition of dendritic crystals is analyzed according to the quantitative correlation model, and preliminary early warning is carried out; electrochemical parameters and auxiliary parameters of the battery cell are collected, and cross validation is carried out on the electrochemical parameters and the auxiliary parameters and preliminary early warning of dendritic crystals; and establishing a dynamic risk and grading response mechanism, dividing the risk into different grades, and setting corresponding response measures. In the implementation process of the technical scheme provided by the invention, by combining dendritic crystal growth prediction and electrochemical parameter analysis, accurate monitoring of the internal state of the power battery is realized, the timeliness and accuracy of thermal runaway early warning are effectively improved, and safe and stable operation of a battery system is ensured.

The invention provides a radio frequency chip high-frequency performance test process and a clamp. The radio frequency chip high-frequency performance test process comprises the following steps: S1, welding a crimping shaft sleeve to one end of a radio frequency cable; by adopting the scheme of combining the coaxial cable and the PCB, the PCB part can be used for digital signal transmission and product power supply, and the coaxial cable is used for radio frequency signal transmission, so that the microwave interference caused by the use of a PCB microstrip line and the signal influence caused by 90-degree switching between the conductive part and a PCB plane microstrip can be reduced, the high-frequency test requirement of a radio frequency chip is met, and the test efficiency is improved. Through the crimping mode, the problems of long welding time, high operation requirements, unmaintainability and the like in the welding process are solved, the situation that after a radio frequency cable is heated for a long time, the high-frequency test index of the clamp is affected is avoided, the independently designed elastic conductive film serves as a transmission elastic carrier of the clamp, the influence of the conductive film on the radio frequency index is reduced to the minimum, and the reliability of the clamp is improved. The fixture is suitable for double-sided chip layout, and the top of the fixture is also provided with a test assembly, so that double-sided radio frequency chip test can be realized.

The invention discloses a method for improving fusion plasma ion cyclotron heating efficiency, and belongs to the technical field of magnetic confinement fusion. The method comprises coupling use of an ion cyclotron antenna and a helical wave antenna, the ion cyclotron antenna is installed in a Tokamak vacuum chamber, is connected with an external radio frequency power supply through a coaxial line, and is used for exciting an ion cyclotron frequency band electromagnetic wave to heat plasma; and the helical wave antenna is arranged at a Tokamak window adjacent to the ion cyclotron antenna, is connected with a radio frequency power supply through a coaxial line or a rectangular waveguide, and is used for exciting a helical wave to increase the plasma density of a scraping layer and improve the accessibility of the ion cyclotron wave. The plasma is excited through the spiral wave antenna, so that the density of the scraping layer is improved, the coupling efficiency of the ion cyclotron wave and the plasma is improved, and technical support is provided for application of ion cyclotron heating in future high-parameter Tokamak.

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.

Provided in the present invention are a device and method for monitoring the welding deformation of a base in the field of welding. The device comprises a round base assembly, adjustment rod assemblies, pointer support assemblies and dial assemblies, wherein the adjustment rod assemblies are arrayed around the round base assembly, each adjustment rod assembly is provided with a long round rod, the axes of four long round rods are adjusted until the four long round rods are horizontal and diagonally collinear, and the four long round rods can be coplanar as a whole; each pointer support assembly is positioned in a base positioning hole, and a cylindrical pointer in each pointer support assembly is coaxial with the base positioning hole; and each dial assembly is assembled on the long round rod, each dial assembly is provided with a dial, and the cylindrical pointer is perpendicular to the dial. The cylindrical pointers display the actual positions of the base positioning holes, the dials in the dial assemblies display the hole center positions of theoretical base positioning holes, and a deviation line is marked on each dial, thus facilitating the comparison between theoretical data and actual data; and by means of monitoring the relative positions of the base positioning holes in real time, data reference and position reference are provided for welding process adjustment. The present invention is suitable for being applied as a device and method for monitoring the welding deformation of a base.

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 provides a circularly polarized antenna based on an artificial magnetic conductor and electronic equipment, and relates to the technical field of wireless communication. The circularly polarized antenna is composed of a coaxial line, a first dielectric substrate, a second dielectric substrate and a grounding plate, the first dielectric substrate, the second dielectric substrate and the grounding plate are arranged from top to bottom, the first dielectric substrate, the second dielectric substrate and the grounding plate are parallel and mutually spaced, an upper-layer radiation unit is printed on the upper surface of the first dielectric substrate, and a lower-layer radiation unit is printed on the lower surface of the first dielectric substrate. An outer conductor of the coaxial line is connected with the lower-layer radiation unit, an inner conductor of the coaxial line penetrates through the first dielectric substrate and is connected with the upper-layer radiation unit, a plurality of rows and columns of metasurface units are printed on the upper surface of the second dielectric substrate, the metasurface units comprise multiple types, and the multiple types of metasurface units respectively have different shapes. Therefore, the bandwidth and the profile height of the circularly polarized antenna are well considered, and the performance of the circularly polarized antenna is better.

The invention relates to the technical field related to drilling machines, in particular to a mining drilling machine and a drilling rod assembling and disassembling method. Comprising a lifting frame and a drill rod box, a plurality of containing grooves are formed in the drill rod box, a clamping unit is arranged, the clamping unit comprises a transverse moving assembly, a lifting assembly and a transfer manipulator, the transverse moving assembly and the lifting assembly drive the transfer manipulator to move in the transverse direction and the vertical direction correspondingly, and the vertical projection of the transfer manipulator is located in the drill rod box; the transfer manipulator is used for clamping the drill rod and can rotate; the lifting frame comprises a lifting sleeve, and a through hole allowing a drill rod to penetrate through is formed in the lifting sleeve. An overturning mechanical arm is arranged on the side, away from the transfer mechanical arm, of the lifting frame, the clamping center of the overturning mechanical arm is opposite to the through hole, and the overturning mechanical arm is used for driving the drill rod to rotate to the coaxial line of the driving drill rod. According to the mining drilling machine, the width of the drilling machine can be reduced.

The application provides a sound amplification sound column with adjustable vertical direction. The sound column comprises multiple coaxial cylindrical wave mid-high sound boxes arranged vertically, a sound box connecting mechanism, and a sound column direction adjusting mechanism. The sound box comprises a box with a trapezoidal vertical section and a coaxial cylindrical wave mid-high module installed on the panel of the box. The coaxial cylindrical wave mid-high module comprises a midrange horn, a high-frequency module, and a midrange phase plate. The high-frequency module is embedded in the midrange phase plate, and the midrange phase plate is placed on the midrange horn. The sound column is composed of multiple coaxial cylindrical wave mid-high sound boxes arranged vertically, and the curvature of the cylindrical wave is accurately controlled through the connecting mechanism and the adjusting mechanism to realize continuous adjustment of the vertical direction.

The embodiment of the invention discloses a measuring device, a clamp and measuring equipment, relates to the field of measuring instruments, and solves the problem of inaccurate measuring results. According to the specific scheme, the measuring device comprises a host, a supporting assembly and a receiving assembly. The supporting assembly comprises a first connecting rod and a cable which are connected with each other. The receiving assembly comprises a receiver, a signal processor, a second connecting rod and a coaxial line. The host and the signal processor are electrically connected through a cable. The receiver and the signal processor are electrically connected through a coaxial line. The first connecting rod is rotationally connected with the second connecting rod; and one end, far away from the host, of the cable is electrically connected with the signal processor. The coaxial line does not span the rotating joint of the first connecting rod and the second connecting rod, and the coaxial line with the large bending radius can not be bent. The problem that the bending radius is large in the folding process is solved. The distance between the receiver and the host can be adjusted, so that the signal of the receiver is prevented from being shielded, and the anti-interference capability of the measuring device and the accuracy of the measuring result are improved.

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.

A multi-tap distribution box for connection to a main coaxial line carrying high frequency and alternating current power signals, the multi-tap distribution box comprising a make before break jumper that ensures that connection between first and second main line coaxial connectors in the box is not interrupted when a cover of the box is removed.

The invention relates to a coaxial line transformer-based power synthesis circuit and synthesizer, which comprises an impedance reducing sub-circuit and an impedance increasing conversion sub-circuit, and is characterized in that the output end of the impedance reducing sub-circuit is connected with the input end of the impedance increasing conversion sub-circuit; the input end of the impedance reducing sub-circuit is constructed as the input end of the power synthesis circuit, and the output end of the impedance increasing conversion sub-circuit is constructed as the output end of the power synthesis circuit; the impedance reducing sub-circuit and the impedance increasing conversion sub-circuit comprise coaxial line magnet ring transformers, coaxial lines penetrate through magnet rings to form the coaxial line magnet ring transformers, inner conductors of the coaxial lines serve as primary coils of the transformers, and outer conductors of the coaxial lines serve as secondary coils of the transformers. The impedance reduction sub-circuit is used for performing power synthesis and impedance reduction through the turn ratio of the coaxial line magnet ring transformer, and the impedance rising conversion sub-circuit is used for impedance matching and power transmission optimization so as to convert a medium-low impedance value back to a standard impedance value required by a load and ensure that the maximum power is transmitted to the load.

The invention discloses a millimeter wave end-fire horizontal polarization broadband wide-angle scanning phased antenna array and equipment. The array comprises a lower-layer metal surface, a middle metal surface, an upper-layer metal surface, metal through holes, metal blind holes and a feed port, a radiator of the antenna array is composed of rectangular annular patches which are arranged at the front ends of an upper-layer metal surface and a lower-layer metal surface and are provided with concave U-shaped structures, and opening gaps which are etched at the central positions of the front ends of the upper-layer metal surface and the lower-layer metal surface of the substrate integrated waveguide; a plurality of antenna units in the antenna array feed independently through a plurality of feed ports and regulate and control an excitation phase; the metal blind hole is connected with the substrate integrated coaxial line; the substrate integrated coaxial line is composed of a substrate integrated waveguide and a transmission line located on a middle metal face. The substrate integrated waveguide is composed of two layers of dielectric substrates, a bonding layer, an upper-layer metal surface, a lower-layer metal surface and metal through holes. According to the invention, the broadband and wide-angle phase control scanning performance of the array beam in the plane where the array is located is realized.

The planar coaxial transmission line comprises a signal line, an upper layer metal ground, a lower layer metal ground, a plated-through hole, a dielectric substrate and a shielding cover, the upper layer metal ground and the lower layer metal ground are arranged on the upper surface and the lower surface of the dielectric substrate respectively, and the plated-through hole is connected with the upper layer metal ground and the lower layer metal ground. The signal line and the upper-layer metal ground are located on the same plane, a medium groove is arranged between the upper-layer metal ground and the signal line, and a shielding cover is arranged above the signal line and is connected with the upper-layer metal ground. The planar coaxial transmission line can be applied to implementation of a radio frequency microwave circuit module and system with low loss and high shielding performance, and can be directly interconnected and integrated with an existing planar transmission line circuit, an existing coaxial line circuit, an existing electronic component and an existing chip device, electromagnetic shielding isolation is improved, electromagnetic signal transmission is enhanced, and the transmission efficiency is improved. And the size and weight of the circuit module and the system are simplified, the reliability is higher, the design is simpler, and the cost is lower.

The invention discloses a coaxial female end connector and an assembling method, and relates to the technical field of connectors, the coaxial female end connector comprises a shell assembly and a terminal assembly, one end of the terminal assembly can be inserted into the shell assembly and is detachably connected with the shell assembly; the terminal assembly comprises a shielding metal shell structure and a signal transmission structure, the shielding metal shell structure comprises a first shielding shell and a second shielding shell, the first shielding shell is internally provided with a first cavity penetrating through the two ends of the first shielding shell, and the second shielding shell is internally provided with a second cavity penetrating through the two ends of the second shielding shell; one end of the first shielding shell is inserted into the second cavity and is fixedly connected with the second shielding shell, and the first shielding shell and the second shielding shell are metal pieces formed by stamping; the signal transmission structure comprises an insulating core, a central conductor and a coaxial cable, and solves the problems of more signal abrupt changes and unstable signal transmission when the existing coaxial female end connector is used.

The invention belongs to the technical field of imaging, and provides an imaging device and an operation method thereof, and the imaging device comprises a base which is provided with a first light-transmitting hole and a second light-transmitting hole which are coaxially arranged; the rotating disc is rotationally arranged in the base, a plurality of first sliding grooves which are distributed in the circumferential direction at intervals are formed in the rotating disc, each first sliding groove is provided with a first sliding block, the first sliding blocks can linearly move in the first sliding grooves in a reciprocating mode, and a plurality of optical filters which are linearly distributed at intervals are arranged on the first sliding blocks; wherein the first sliding groove is provided with a third light-transmitting hole, the third light-transmitting hole can be coaxial with the first light-transmitting hole and the second light-transmitting hole, and each light filter located on the first sliding block can move to the third light-transmitting hole and cover the third light-transmitting hole. By the adoption of the structure, a plurality of different optical filters can be located on the same rotating disc, the different optical filters can be switched according to experiment requirements, operation is easy and convenient, and the automation degree is high.

The invention discloses a miniaturized circular patch antenna loaded with four symmetrical L-shaped grooves, and relates to the technical field of wireless communication. The antenna comprises a circular patch, a dielectric substrate, a metal grounding plate and a coaxial line. The circular patch clings to the upper surface of the dielectric substrate, and the metal grounding plate is arranged on the lower surface of the dielectric substrate; four L-shaped grooves are formed in the circular patch, the geometric dimensions of the four L-shaped grooves are the same, and the four L-shaped grooves are symmetrically distributed around the circle center; the circular patch adopts a coaxial line for feeding, the inner conductor is connected to the circular patch, and the outer conductor is connected with the metal grounding plate. The symmetrical L-shaped grooves are etched in the circular patch, so that the resonant frequency of the antenna is effectively reduced, and the electrical size of the antenna is reduced; the antenna keeps relatively high gain and radiation efficiency, and has the advantages of simple structure and excellent performance.

The utility model discloses an instrument for measuring perpendicularity and ovality of a quartz tube. Comprising a workbench, a vertical hollow rotating shaft, a rotation driving mechanism, a supporting disc, a sliding frame capable of being horizontally assembled on the workbench in a sliding mode, a vertical driving mechanism, a digital display dial indicator capable of moving close to the rotating shaft, a control shaft coaxially penetrating through the rotating shaft in a sliding mode, a first air cylinder with the output end in shaft connection with the lower end of the control shaft and a positioning unit. The positioning unit comprises at least three vertical positioning arms evenly distributed in the circumferential direction of the rotating shaft and a transmission mechanism connected with the multiple positioning arms and the control shaft, and when the control shaft slides upwards, the transmission mechanism drives the multiple positioning arms to move around the rotating shaft in a scattered mode. The plurality of positioning arms can be dispersed around the rotating shaft so as to abut against the inner wall of the quartz tube, so that the quartz tube and the rotating shaft are in a coaxial state, the accuracy of a detected value is improved, and the digital display dial indicator can be connected with a control terminal through a data line so as to collect and analyze data.

The utility model provides a coaxial line automatic weaving supporting device and a connector processing production line. The device comprises a mounting platform; the chopping and pressing assembly is arranged on the mounting platform, a machining through hole is formed in the chopping and pressing assembly, the coaxial line penetrates through the machining through hole, and the chopping and pressing assembly can cut the coaxial line, so that part of the braid layer is cut off, and part of the inner core is exposed; the knitting pushing assembly is arranged on the mounting platform; the knitting pushing assembly comprises a sleeve and an air blowing unit arranged around the sleeve. The inner wall of the sleeve can drive part of the cut-off braid layer to move in the direction away from the inner core, and the air blowing unit can blow air to the braid layer while the braid layer moves. According to the device, the coaxial line can be automatically expanded, the inner core and the braid layer can be expanded, and after the braid is chopped, pressed and loosened, the braid layer can be quickly and uniformly expanded through the synergistic effect of the sleeve and the air blowing unit, so that the braid is treated in place in one step, and the product short-circuit scrapping caused by the residual braid wire is reduced.

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 belongs to the technical field of near-field imaging, and particularly relates to a microwave and millimeter wave near-field subsurface microscopic imaging device and method based on signal interference, and the device comprises a vector network analyzer, a signal separation device, a phase adjustment device, a semi-steel coaxial line, a displacement platform, and an industrial control computer. The vector network analyzer comprises a signal separation unit, a frequency synthesis source, a first receiver and a second receiver, wherein the frequency synthesis source, the first receiver and the second receiver are respectively connected with the signal separation unit and used for generating microwave and millimeter wave test signals. The signal separation device is respectively connected with the vector network analyzer, the phase adjusting device and the semi-steel coaxial line, and the displacement table is connected with the vector network analyzer through the industrial personal computer; the tail end of the semi-steel coaxial line, which is far away from the signal separation device, is provided with a conical needle tip-shaped near-field probe; and the needle tip of the near-field probe is vertical to the surface of a to-be-detected sample arranged on the displacement table.

The broadband coaxial-to-microstrip line converter comprises a coaxial line, a gold strip and a substrate, the coaxial line comprises a coaxial outer conductor, a central medium and a coaxial inner conductor which are arranged from outside to inside, the coaxial inner conductor at one end of the coaxial line is shorter than the coaxial outer conductor, and a containing space for installing the gold strip and the substrate is formed. The substrate comprises a top-layer conduction band, a middle insulating layer and a bottom-layer conduction band, the top-layer conduction band comprises a top-layer gradual change area and a microstrip line which are located on the same center line with the coaxial inner conductor, and the bottom-layer conduction band is provided with a gradual change hollow area right below the top-layer gradual change area to jointly form a mode gradual change area. According to the utility model, the structure is exquisite, a TEM mode transmitted in a coaxial line can be smoothly transited to a quasi TEM mode transmitted by a microstrip line, the working bandwidth of the whole conversion circuit is effectively improved, the working frequency can reach up to 50GHz, and the return loss of each frequency point is less than-15dB.

The utility model discloses an electric energy meter data acquisition unit, which relates to the field of data acquisition, and is provided with an equipment interface, a communication interface, a communication module, an MCU (Microprogrammed Control Unit), an antenna and a first DCDC (Direct Current to Direct Current) module, the antenna is arranged near the electric energy meter through the coaxial line, the antenna is arranged near the electric energy meter through the coaxial line, the first DCDC module reduces the first voltage into the second voltage and then supplies power to the communication module, the equipment interface transmits data to the MCU through the communication interface, and after the communication module is powered on and the MCU receives the data, the MCU communicates with the electric energy meter through the communication module and the antenna. The influence of the MCU in the electric energy meter data collector on the antenna is greatly reduced, an iron plate does not need to be arranged like a sucker antenna, the appearance is low, and the possibility of being damaged is reduced.

The invention discloses a single-stage cavity type power combiner capable of adjusting output power, the single-stage cavity type power combiner is used for an accelerator high-frequency system power source, the single-stage cavity type power combiner adopts a section of coaxial line resonant cavity folded into an n shape as a main body structure of the combiner, and by increasing the number of branches synthesized at a time, the output power of the combiner can be adjusted. The number of the single-stage cavity type power combiner is equivalent to the number of branches of the multi-stage power combiner, so that the multi-stage power combiner is replaced by the single-stage cavity type power combiner; the single-stage cavity type power combiner comprises a plurality of input coupling structures, an output coupling structure and a coaxial line resonant cavity, the plurality of input coupling structures are divided into two groups and are symmetrically distributed at two ends of the coaxial line resonant cavity shaped like a Chinese character'ji ', and each input coupling structure is directly connected with an output port of each power amplifier unit; when the single-stage cavity type power combiner has a module fault, the coupling between the fault module and the system can be quickly relieved, and the output power of other power amplifier modules is adjusted, so that the overall output power is recovered to be balanced.

The present invention provides a flat-bottomed guide tube for a CZ silicon single crystal furnace, comprising a guide tube side wall portion, a guide tube transition portion and a guide tube flat bottom portion, wherein the guide tube side wall portion, the guide tube transition portion and the guide tube flat bottom portion are sequentially connected, wherein the guide tube side wall portion, the guide tube transition portion and the guide tube flat bottom portion are all annular structures, the diameter of the guide tube flat bottom portion is smaller than the diameter of the guide tube side wall portion, and the guide tube flat bottom portion and the guide tube side wall portion are coaxially arranged to reduce the gap between the silicon solution liquid surface and the guide tube. The present invention has the beneficial effect of having a guide tube flat bottom portion, reducing the gap between the guide tube and the liquid surface, accelerating the gas flow rate, and being able to quickly take away the volatilized oxygen, which can effectively reduce the oxygen content of large-sized single crystals and improve the quality of large-sized single crystals.