15 results about "Circular loop" patented technology

The invention discloses a mode-locked laser based on cross-polarization feedback injection and a control method thereof, and belongs to the technical field of lasers, a light beam emitted by a VCSEL laser is divided into two beams through an optical splitter, the first beam is divided into a first TM mode light beam and a first TE mode light beam through a first polarization-maintaining beam splitter, the two beams form an annular loop on a light path, and the first TM mode light beam and the first TE mode light beam form an annular loop on the light path; and a half-wave plate is arranged on the loop. And the two beams of light are respectively and oppositely propagated along the annular loop, return to the VCSEL laser after being subjected to polarization state conversion by the half-wave plate, are reflected by a resonant cavity of the VCSEL laser again, are coupled into the resonant cavity after being subjected to secondary polarization state conversion by the half-wave plate, and finally finish the output of the mode-locked laser. The laser reaches a mode-locked state by adjusting the angle of the half-wave plate. The laser uses an orthogonal polarization feedback injection mechanism, does not need to use a saturable absorber and a polarization inverter, is simple in structure and easy to implement, greatly reduces the cost and complexity of a system, and meets the requirements of different application scenes.

The present invention proposes a method, device, storage medium and electronic device for scheduling aircraft landing at a vertical take-off and landing field. When the target aircraft is the aircraft with the highest priority in the hemispherical airspace at the current moment, it is determined whether the target aircraft meets the direct flight condition. The direct flight condition means that the longitudinal interval between the target aircraft and any aircraft in the direct flight process is greater than the first preset distance; if the direct flight condition is met, the target aircraft is controlled to fly directly to the fusion point; when the target aircraft flies to the fusion point, the target aircraft is controlled to descend to the preset take-off and landing point. By setting multiple circular loops (sorting rings) in the hemispherical airspace to accommodate more aircraft, the airspace capacity is increased and the utilization rate of the hemispherical airspace is improved. At the same time, the direct flight condition is used to manage the aircraft in the hemispherical airspace to fly to the fusion point, so that the aircraft in the hemispherical airspace can land in an orderly and safe manner, ensuring the operating efficiency of the aircraft in the hemispherical airspace.

The utility model relates to a stacked optical module packaging device, which is based on an organic substrate (2) with multiple layers of built-in wires (1), carries out system packaging design on an optical module circuit for transmitting or receiving light, and realizes stacking arrangement of devices in the optical module circuit through the internal position and the surface position of the organic substrate (2). It is guaranteed that the glazing working face of the optical working device (6) is exposed out of the external space, and the light emitting efficiency or the light receiving efficiency of the optical working device (6) to the external environment is guaranteed; a transparent material (9) is designed to cover and wrap a window (8) formed in the surface of the organic substrate (2) and an arranged device, the device is prevented from being directly exposed, the working reliability of the device is greatly improved, when the designed packaging device is started, a loop path formed by current working forms a ring, loop inductances are mutually counteracted, and the reliability of the device is improved. The loop inductance is greatly reduced, and the working performance of the packaging device can be effectively improved.

A device for door unlocking for a vehicle, having an actuating element, including an actuating portion and a flexibly unwindable band portion, which is connected to a Bowden cable. The Bowden cable and the actuating element are arranged on a base plate and / or a door, and the actuating element is connected to a rotatably arranged loop lever in such a way that, when the loop lever is rotated by the actuating element, the Bowden cable connected to the loop lever is movable. The loop lever includes a (preferably) circular loop lever portion, against which the actuating element partially abuts.

The application discloses a wave shape selection antenna, which comprises a first metal structure, a second metal structure, a wave shape selection structure and a feeding structure, the first metal structure is connected with the second metal structure, the second metal structure is connected with the wave shape selection structure, the first metal structure is realized by forming a dipole structure with a circular loop and a truncated end through a gap on a metal patch structure, and the second metal structure is realized by using a microstrip line structure; the wave shape selection antenna has the advantages that the wave shape selection planar structure is integrated with the antenna structure, the wave shape selection planar structure function and the antenna function are combined, and when the wave shape selection antenna is used in a wireless communication system, the structural complexity can be reduced.

The utility model discloses a stator receiving coil of an eddy current torque sensor, which relates to the field of torque sensors, solves the problem that the induction electromotive force is possibly generated when a rotor does not work to influence the signal receiving accuracy, and adopts the following scheme that the stator receiving coil comprises a group of complete coils and a rotor, the receiving coil is formed by connecting a wire in a positive and negative connection mode, and the positive and negative connection receiving coils are the same in structure and are symmetrical; the receiving coil is laid along a circular loop, the receiving coil is of a rhombic structure, the coverage angle of the receiving coil is a 40-degree period, and the coverage angle of the loop of the positively and negatively connected receiving coil corresponds to a rotor period; according to the stator receiving coil of the eddy current torque sensor, through the arrangement of the overall symmetrical structure of the receiving coil, it is ensured that the output induced electromotive force of a system is zero when no rotor acts, interference of the system is effectively eliminated through the design, and the accuracy of signal receiving is improved.

A tension measurement and connection system for guy wires of a guyed wind measurement tower and its assembly method belong to the infrastructure technology field of the onshore wind power industry. The tension measurement and connection system is installed at the connection point between one end of the guy wire and the foundation tie rod of the guy wire reel, realizing the connection between the structural guy wire and the foundation tie rod. Simultaneously, during installation and construction, the tension of the guy wire is measured to ensure it reaches its design value, guaranteeing the safety of the entire structural system. It connects the main rod to the foundation tie rod via a U-shaped connecting rod and a circular loop, and a limiting nut secures the connecting crossbar to the U-shaped connecting rod, forming a closed-loop series structure. The guy wire is then fixed to the series structure using a clamp sleeve, a conical clamp, and clamp tightening bolts. A sensor installed on the sensor mounting bracket and the limiting nut ensure the pre-tension of the guy wire reaches its design value. This invention can simultaneously measure the pre-tension of the guy wire and connect it to the foundation tie rod of the guy wire reel, allowing the guy wire to perform its designed function and ensuring the safety of the wind measurement tower.

The invention discloses a narrow-linewidth single-longitudinal-mode seed laser system and a generation method. The narrow-linewidth single-longitudinal-mode seed laser system comprises a VCSEL laser, a polarization-maintaining beam splitter, a reflector and a half-wave plate. A light beam emitted by a VCSEL laser is firstly divided into a TM mode light beam and a TE mode light beam through a polarization-maintaining beam splitter. A plurality of reflectors are arranged on the propagation path of the TM mode light beam and the TE mode light beam, and the design of the reflectors enables the light beams of the two modes to form an annular loop. And a half-wave plate is arranged on the annular loop so as to regulate and control the polarization state of the light beam. Through the arrangement of the system, narrow-linewidth (about 1MHZ) single-longitudinal-mode seed laser can be generated, and a high-quality light source is provided for the fields of optical communication, spectral analysis and the like; meanwhile, the structure is simple, implementation is easy, and implementation complexity and cost of the narrow-linewidth single-longitudinal-mode seed laser are reduced.

The application discloses a parameter acquisition method of a circular ring antenna array with equal-amplitude and in-phase patch feed, the antenna array comprises a metal ground plane and a plurality of equal-amplitude and in-phase excited antenna units arranged in a linear array on the metal ground plane, the antenna unit has a common mode port, each common mode port comprises two single ports, an active common mode reflection coefficient of the common mode port of the antenna unit is equal to half of the sum of common mode reflection coefficients of the two single ports, the common mode reflection coefficient of the single port is calculated first, and the active common mode reflection coefficient of the common mode port is indirectly obtained; the application has the advantages that the calculation process is simplified, the calculation amount is small, the time consumption is relatively short, and the application is beneficial to popularization and application in engineering practice.

The present invention provides a ring topology network, wherein the network includes multiple terminal nodes, all of which are serially connected to form a closed-loop loop, the output end of the previous terminal node is connected to the input end of the next terminal node, and each terminal node is configured with a network card device and an optical module, wherein: the optical module is used to receive an input optical signal, convert the optical signal into an electrical signal for caching and send it to the network card device in the form of a data packet, and convert the data packet to be forwarded into an optical signal and then send it outward; the network card device is used to process the received data packet according to a pre-configured forwarding rule, wherein the pre-configured forwarding rule includes: when the destination address of the data packet is a local host, it is sent to the host where it is located for storage, when the destination address of the data packet is not a local host, it is sent to the optical module for forwarding, and when the source address of the data packet is a local host, it is discarded.

The test and measurement apparatus includes an input unit that receives a non-return-to-zero (NRZ) waveform signal from a device under test, a ramp generator that generates a ramp sweep signal using the NRZ waveform signal, a gate that generates gated X-axis and Y-axis data by gating the ramp sweep signal and the NRZ waveform signal, and a display that displays the gated X-axis and Y-axis data as a circular loop image. The circular loop image generation method receives an input waveform, generates a ramp sweep signal using the input waveform, gates the ramp sweep signal and the input waveform to generate gated X-axis and Y-axis data, and displays the gated X-axis and Y-axis data as a circular loop image.

The invention discloses a bearing ring surface defect on-line detection device and method based on machine vision, and the device comprises a base station, the top of the base station is provided with a circulating feeding mechanism for circularly conveying a to-be-detected bearing ring, and one side of the top of the base station is provided with a detection mechanism for detecting the bearing ring at a position corresponding to the circulating feeding mechanism. A limiting mechanism used for limiting the circulating feeding mechanism is installed at the position, corresponding to the circulating feeding mechanism, of the other side of the top of the base table, and the circulating feeding mechanism comprises a servo motor fixedly connected to the base table. According to the bearing ring detection device, a bearing ring to be detected can be conveniently clamped and fixed, the clamped bearing ring can be clearly shot, and the bearing ring to be detected can be conveniently and continuously fed, so that the detection efficiency of the bearing ring is improved, and various defects on the surface of the bearing ring can be accurately recognized through feature comparison.

An antenna that can be placed near a window with a depth of about 100 mm and can receive broadcasts from local TV stations is composed of a combination of well-known antenna element shapes. 【Solution means】The antenna combines a double-square loop element, a circular loop element, and a gate element, which are well-known antenna element shapes, as follows. Let λ be the wavelength of the target frequency. First, a vertical rectangle with a short side of about 0.22λ and a long side of about 0.5λ is provided with a feeding segment to form a double-square loop feeding element. For the upper segment of the double-square loop element, a gate element with a side length of about 0.167λ is placed at a distance of about 0.117λ behind the direction of radio wave arrival, such that its upper side is approximately at the same height as the upper segment of the double-square loop element. A circular loop element is placed as a reflector at a distance of about 0.117λ behind the direction of radio wave arrival, such that the center of the lower square of the double-square loop element and the center of the circular loop element are at approximately the same height.

Provided are a plasma reaction device capable of cooling a reactor body and a magnetic core by circulating cooling water, and a cooling method thereof, the plasma reaction device including an annular loop space therein, and a body cooling channel therein, a magnetic core having a primary coil to generate plasma by exciting a gas in the annular loop space, a cooling block being in thermal contact with the reactor body or the magnetic core, and having a block cooling channel therein, a connecting block having a first water inlet pipe and a first water outlet pipe at a side thereof to supply cooling water at a first temperature, and having a second water inlet pipe and a second water outlet pipe at another side thereof to collect the cooling water at a second temperature higher than the first temperature, and a cooling water circulation line mounted between the connecting block, the cooling block, and the reactor body.

Device for unlocking the door (1) of a vehicle, comprising an actuating element (2) consisting of an actuating section (27) and a flexibly unwindable band section (28) which is connected to a Bowden cable (11), wherein the Bowden cable (11) and the actuating element (2) are arranged on a base plate (9) and / or a door, and the actuating element (2) is connected to a rotatably arranged loop lever (5) such that when the loop lever (5) is rotated by the actuating element (2), the Bowden cable (11) connected to the loop lever (5) is movable, characterized in that the loop lever (5) has a preferably circular loop lever section (8) on which the actuating element (2) partially rests.