47 results about "Twin-lead" patented technology

The invention discloses an ion migration spectrum instrument comprising an ion source electrode, a focus guiding electrode and an ion storage electrode, wherein the focus guiding electrode is arranged at one side of the ion source electrode, the ion storage electrode is arranged at one side of the focus guiding electrode, and the side of the focus guiding electrode is far away from the ion source electrode. The voltage of the focus guiding electrode and the ion storage electrode is controlled, and migration pipe work control is realized. At an ion storage phase, an ionized zone generates a lot of ions which are stored at an area between the focus guiding electrode and the ion storage electrode; at an ion lead-out phase, ions enter a migration zone in a very short time. An ion storage structure of the ion migration spectrum instrument is characterized in that stored ions can be led into the migration zone in a very short time; a net structure of the ion storage electrode guarantees that the stored ions do not overflow because excessive ions are stored; the structure can improve ion utilization rate of the migration pipe to 10% to 20%, and therefore detection sensitivity of the migration pipe is improved.

The invention provides a squeeze-type asymmetrical double-core optical fiber switch, which comprises an asymmetrical double-core optical fiber, a stackable piezoelectric ceramic squeezing device and an adjustable voltage source. Two 3dB couplers are synthesized on the asymmetrical double-core optical fiber in a fused biconical taper manner, and the two couplers form a Mach-Zehnder interferometer; a ballast direction of a piezoelectric ceramic stack is perpendicular to the axial direction of the optical fiber, a fixed angle is formed between the piezoelectric ceramic stack and the position of double cores, and the piezoelectric ceramic stack is located between the two couplers. The squeeze-type asymmetrical double-core optical fiber switch is simple in structure and easy to manufacture; light paths are ensured to be relatively steady, and influence caused by environment factors, such as vibration, temperature and the like, can be effectively avoided; insertion loss is low, performance of whole optical fiber electro-optic modulation is improved, and modulation on an optical switch in a signal optical fiber can be implemented; and a modulation length necessary for the optical fiber is very short, and the shortest length can be only a few millimeters.

The invention discloses sodium bismuth titanate-based high-strain lead-free piezoelectric ceramic and a preparation method thereof, aiming to solve the technical problem that the existing lead-based piezoelectric ceramic has low strain quantity. The technical scheme of the invention is as follows: dosing analytically pure BaCO3, Bi2O3, TiO2, Li2CO3 and Na2CO3 at a stoichiometric ratio of (Na1-xLix)0.5Bi0.5TiO3-BaTiO3, wherein 0<=x<=0.09; performing ball milling on the dosed materials in a ball mill tank, drying the ball milling mixture, briquetting, pre-calcining, taking out the calcined materials to break, performing ball milling again, and sieving; prepressing the sieved powder into sheets, and then performing isostatic pressing; and sintering the moulded sheets to obtain the sodium bismuth titanate-based high strain lead-free piezoelectric ceramic. As the binary system piezoelectric ceramic has good piezoelectric property, the strain quantity is increased from 0.15% in the background art to 0.21-0.27%.

The invention discloses an electric quantity synchronous processing-based intelligent electric energy meter dual core communication method. A master SPI management core and a slave SPI metering core are connected via an SPI interface; a communication frame between the management core and the metering core consists of a frame start character, a control code, a data field length, a data field, a checking code and an ending character; the data field comprises data markers of electric energy meter data items that need to be read; the intelligent electric energy meter dual core communication method is advantageous in that an SPI communication protocol is built between the electric energy meter management core and the metering core, the communication frame is free from address redundancy, the electric energy meter data items that are needed are read according to the data markers, communication between the management core and the metering core is enabled to be simple and highly efficient, and electric quantity metering of the management core and the metering core can be synchronized.

A variable angle slant hole (VASH) collimator for providing collimation of high energy photons such as gamma rays during radiological imaging of humans. The VASH collimator includes a stack of multiple collimator leaves and a means of quickly aligning each leaf to provide various projection angles. Rather than rotate the detector around the subject, the VASH collimator enables the detector to remain stationary while the projection angle of the collimator is varied for tomographic acquisition. High collimator efficiency is achieved by maintaining the leaves in accurate alignment through the various projection angles. Individual leaves include unique angled cuts to maintain a precise target collimation angle. Matching wedge blocks driven by two actuators with twin-lead screws accurately position each leaf in the stack resulting in the precise target collimation angle. A computer interface with the actuators enables precise control of the projection angle of the collimator.

The present invention relates to connecting and impedance matching a balanced electrical signal, such as that received by an antenna, with an unbalanced transmission circuit, such as that delivered to an amplifier. A planar circuit board is described that delivers signals having opposite polarization collected by different antenna arms to a location for convenient connection to a twin-lead transmission line. Circuit topologies for the circuit board are described that provide relatively low loss and low cross-coupling. A tapered microstrip balun is also described that includes two conducting microstrips on opposing faces of a dielectric separator. Stepped or tapered microstrips at the balanced input port of the balun provide an impedance transforming section electrically connecting to a mode transducing section, in which one of the microstrips tapers outward to form a substantially wider strip. Appropriate choice of parameters is shown to lead to favorable performance in a compact balun.

The invention provides a wiring device which comprises a wiring fixing portion (10) and a wiring lead (20). The wiring fixing portion (10) comprises a first moving part (11) and a second moving part (12), and the first moving part (11) and the second moving part (12) form a clamping space used for clamping an object to be wired; the first end of the wiring lead (20) is detachably connected on the wiring fixing portion (10), and the second end of the wiring lead (20) is connected to a wiring connector of testing equipment. By the arrangement, connection of a testing circuit can be completed at one step conveniently and rapidly, and loop connection can be realized; the problem about the lack of a special wiring device for error test of contact-type high-voltage current transformer is solved.

Provided is a higher density, thinner and lower cost semiconductor device by eliminating reliability failure due to concentration of internal stress in a final semiconductor device. The semiconductor device is provided with a semiconductor element; a supporting substrate, which is arranged on a surface opposite to a surface whereupon a pad of the semiconductor element is arranged, and has an area larger than that of the semiconductor element; an embedding insulating layer for embedding the semiconductor element on the supporting substrate; a fan-out wiring lead out from the pad to a region on the outer circumference side of the semiconductor element on the embedding insulating layer; and a wiring thickness reinforcing section, which is arranged in a prescribed region above the outer circumference section of the semiconductor element for reinforcing mechanical strength of the embedding insulating layer and the fan-out wiring.

The invention relates to a non-contact double-core cable current measurement method and device, computer equipment and a storage medium. The method comprises the steps of determining a position circular ring of four magnetoresistive sensor chips, obtaining the radius R of the position circular ring according to the position circular ring, measuring the distance x from any one of wires to the circle center of the position circular ring and the magnetic induction measurement values of the four magnetoresistive sensor chips, obtaining the final values B1, B2, B3 and B4 of the magnetic induction measurement values according to the magnetic induction measurement values, according to the radius R of the position circular ring, the distance x from any one of the measurement wires to the circle center of the position circular ring and the final values B1, B2, B3 and B4 of the magnetic induction measurement values, obtaining the rotation angle theta 1 of the double-core wire, and obtaining the current I of the double-core cable according to the rotation angle theta 1 of the double-core wire. By adopting the method, the current sensor based on the magnetoresistive sensor chip can measure the current of the twin-core cable at any twin-core wire rotation angle.

The invention discloses a bent sensing method based on a twin-core optical fiber. Two optical fiber cores in the twin-core optical fiber are symmetrically distributed in the twin-core optical fiber, coherent superposition is produced in a space when two beams of light identical in frequency, stable in phase difference and having mutual parallel vibration components pass through double holes according to a double-hole interference theory, so that light energy is re-distributed in the space to form a series of light and shade interlaced interference fringes, and the double cores in the twin-coreoptical fiber rightly simulate the double-hole structure. When a single-frequency laser source passes through the twin-core optical fiber, the interference fringes are produced on a receiving screen.When the twin-core optical fiber is bent, optical path difference changes compared with the optical path difference when the fiber is not bent, and accordingly the positions of the highest points ofthe interference fringes displace to form displacement quantities. Therefore, displacement quantities are read from the receiving screen, and the radius of curvature can be derived reversely. The bentsensing method has the advantages of being simple in structure, convenient to measure, low in cost, high in sensing precision and the like.

The invention discloses a method for limiting line short-circuit currents by using a phase shifter. When the system is in normal operation, the number of turns of auxiliary side windings of a shunt transformer ET of the twin-core controllable phase shifter is adjusted by an electronic power switch so that the auxiliary side windings of the shunt transformer ET can be in different link group states. When symmetrical short trouble or asymmetrical short trouble occurs to a circuit or an adjacent circuit where the twin-core controllable phase shifter is placed, a relay protection device sends a separating brake instruction to a high-voltage circuit-breaker, meanwhile, the relay protection device sends a control instruction to the twin-core controllable phase shifter, the electronic power switch rapidly opens circuits for the auxiliary side windings of the shunt transformer ET and a series transformer BT of the twin-core controllable phase shifter, and before a movable contact and a fixed contact of the high-voltage circuit-breaker are separated, the circuits of the auxiliary side windings of the shunt transformer ET and the series transformer BT of the twin-core controllable phase shifter have already been opened. In an intrinsic separating brake time of the high-voltage circuit-breaker, when the high-voltage circuit-breaker starts arcing in an arc extinguishing chamber, the line short-circuit currents has already been limited in a quite low level, and therefore the reigniting or restriking probability of the high-voltage circuit-breaker is effectively lowered.

The invention discloses a manufacturing method of a double-core composite sound equipment cable. The manufacturing method comprises the following steps: wrapping an insulating layer outside an electrified conductor; back-twisting and twisting the two sets of electrified conductors into a bundle to form an electrified conductor pair, wrapping the electrified conductor pair with a first middle sheath, and manufacturing a current transmission part; back twisting the two groups of optical fiber conductors to form an optical fiber conductor pair, and wrapping the bundled optical fiber conductor pair and the supporting piece with a second middle sheath to prepare an audio transmission part; and twisting the current transmission part and the audio transmission part into a bundle through back-twisting, and wrapping the bundle with an isolation layer and an outer sheath in sequence, so that the double-core composite sound equipment cable is manufactured. The independent current transmission part and the audio transmission part are arranged, electric signals and optical signals are transmitted at the same time, then the cable has the double functions of current transmission and audio transmission, excellent interlayer framework support is provided for the internal structure of the cable, and the mechanical property, the electrical property and the structural stability are improved.

The invention provides a clamp system for electrical connection among cell units. The clamp system for electrical connection among cell units has a novel structure, and a cooling fluid can effectively and efficiently cool power cell packs of electric automobiles in a uniform and well-distributed mode. The system comprises a large clamp, a small clamp and an end clamp, wherein the large clamp is used for crossing a cooling deflecting plate and providing electrical connection between two dual cores, the small clamp is used for providing electrical connection between two battery cells inside a dual core, and the end clamp is connected to an anode of a first dual core and a cathode of a last dual core and is used for being connected to a cable of a main power supply.

The invention relates to a radiation-resistant composite shielded nuclear power twin-core control cable which comprises a main conductor and an auxiliary conductor. A main composite insulating layer is coated on the outside of the main conductor, an auxiliary composite insulating layer is coated on the outside of the auxiliary conductor, an isolation layer is arranged on the outsides of the main composite insulating layer and the auxiliary insulating layer, a composite shielding layer is coated on the outside of the isolation layer, a sheath layer is coated on the outside of the composite shielding layer, and a protective layer is coated on the sheath layer. The radiation-resistant composite shielded nuclear power twin-core control cable has the advantages that the radiation-resistant composite shielded nuclear power twin-core control cable is provided with the composite shielding layer, so that high external electromagnetic interference can be effectively shielded and cannot affect the cable, normal usage of the cable can be guaranteed, and the stability of equipment can be improved.

The invention discloses a double-core multi-steel-tube all-steel buckling-restrained brace with double yield points. The buckling-restrained brace has double yield points, is high in seismic energy dissipation capacity and bearing capacity, and can meet the requirement for support bearing capacity of high-rise and long-span buildings under the earthquake action. According to the technical scheme,the buckling-restrained brace comprises an inner core tube and an outer core tube, wherein the inner core tube is made of low-yield-point steel, and the outer core tube is made of high-yield-point steel. The inner core tube is sleeved with the outer core tube, and a set gap exists between the inner core tube and the outer core tube; the two ends of the inner core tube and the two ends of the outercore tube are fixed to end connecting plates, the inner core tube sleeves an inner restraining sleeve, one end of the inner restraining sleeve is fixed to one of the two end connecting plates, and the other end of the inner restraining sleeve is suspended; an outer restraining sleeve sleeves the outer core tube, one end of the outer restraining sleeve is fixed to the other one of the two end connecting plates, and the other end of the outer restraining sleeve is suspended.

The invention relates to a connection method of a double-core coaxial line welding connector. The method comprises the following technical steps of: wiring; external covering processing; external covering processing; braiding and tin dipping; braiding and YAG laser processing; braiding processing; CO2 laser internal covering processing; internal covering processing; internal conductor tin dipping and cutting; and connector connecting. The method has the following advantages: firstly, welding copper sheets do not have to be grounded when a 40 AWG double-core coaxial line is processed, such that numerous manpower and material resources are reduced; secondly, after a connector is welded to a core wire, a mesh grid can be directly welded at the grounding position of the connector, 0 to 180-DEG adjustment can be realized according to the size of the connector and the angle of an internal space adjusting solder, especially during welding of a SATA connector, the angle of a braiding solder can be adjusted so as to guarantee the thickness of the connector; and thirdly, the connection method can conform to the development of a conventional notebook computer and is applied to various computers. Therefore, the connection method provided by the invention has the advantages of wide application scope, simple manufacture, high energy conservation and environmental protection and the like.