8results about How to "Simple and reliable design" patented technology

The utility model relates to the technical field of material loading and unloading, in particular to a rail material transport train material loading and unloading auxiliary device which comprises a base, sliding grooves are formed in the outer walls of the upper ends of the two sides of the base, a sliding rod is movably connected to one side of the inner wall of each sliding groove, and first tooth blocks are fixedly connected to the outer walls of the two sides of the upper end of each sliding rod. First air cylinders are fixedly connected to the outer walls of the two sides of the lower end of the base, one sides of the upper ends of the first air cylinders are fixedly connected with the outer walls of the lower ends of the sliding rods, two fixing blocks are fixedly connected to the outer walls of the two sides of the upper end of the base, connecting grooves are formed in the outer walls of one sides of the upper ends of the fixing blocks, and clamping grooves are formed in the outer walls of one sides of the fixing blocks. The outer wall of the upper end of the base is movably connected with an inclined plate, and the outer walls of the two sides of the inclined plate are each fixedly connected with two fixing columns. The problems that existing material loading and unloading depend on manual cooperation, a large amount of manpower needs to be input, operation efficiency is low, and time and labor are consumed in the loading and unloading process are solved.

The invention provides an optical fiber collimator, an MEMS optical acceleration sensor and a preparation method. The optical fiber collimator comprises a self-calibration coupling unit, a self-focusing collimation unit and a light beam steering adjusting unit. The self-calibration coupling unit is provided with an axial inner hole, and the self-focusing collimation unit and the light beam steering adjusting unit are both installed in the axial inner hole and are oppositely arranged. The first end face, facing the self-focusing collimation unit, of the light beam steering adjustment unit is not perpendicular to the axis of the axial inner hole. Light rays incident through the self-focusing collimation unit are reflected by the first end face to be turned and emitted out of the self-calibration coupling unit; the optical fiber collimator integrates the light beam steering and angle adjusting functions, after the system is installed, the direction of the emergent light beam can be optimized in real time by adjusting the light beam steering adjusting unit in the circumferential direction, and the installation difficulty is greatly reduced.

The application discloses a Sepic type power correction circuit based on a switched inductor, which comprises switching tubes S1-S3, diodes D1-D5, inductors L1-L5, capacitors C1 and C o The diodes D3-D5 and the inductors L4 and L5 form a switched inductor structure, and the voltage gain of the converter is D / (2-D). Compared with a conventional Sepic PFC converter, the Sepic type power correction circuit based on the switched inductor improves the step-down gain, ensures that the whole duty cycle range is in a step-down state, and has a larger duty cycle than the conventional Sepic PFC converter in the case of a high step-down ratio, thereby effectively avoiding the emergence of a limit duty cycle. The no-bridge structure can realize lower conduction loss. The original output diode is replaced by the switched inductor structure, so that the output current is continuous, and the output current can be filtered. All the switching tubes are common ground, and a lower-cost driving circuit can be used.

The application discloses a bipolar high-gain Cuk DC-DC converter for a direct-current microgrid, and relates to the field of voltage converters.The bipolar high-gain Cuk DC-DC converter comprises a coupled input unit, a bipolar voltage boosting unit and an output unit which are adaptively connected.The coupled input unit comprises a switching tube S and a coupled inductor.The same name end of the primary winding L1 of the coupled inductor is connected with the first electrode of the switching tube S, the third electrode of the switching tube S forms the positive input end of the coupled input unit, and the non-same name end of the primary winding L1 of the coupled inductor forms the negative input end of the coupled input unit.The first electrode of the switching tube S is connected with the neutral point of the output unit through the bipolar voltage boosting unit, the negative input end of the coupled input unit is connected with the negative output end of the output unit through the bipolar voltage boosting unit, and the output voltage amplitude of the positive output end and the negative output end of the output unit relative to the neutral point is equal.The converter has the advantages of high gain, self-voltage equalization, no need of an additional clamping circuit, high efficiency and strong reliability.

The utility model relates to the technical field of switch power supply circuits, in particular to a residual electricity rapid discharge circuit and a switch thereof. The relay RL1 is used for controlling on and off of a power supply; the bleeder circuit comprises a triode Q1, and a base electrode of the triode Q1 is connected to the control circuit and used for controlling conduction of the bleeder circuit; the control circuit comprises an MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) Q2, and a grid electrode of the MOSFET Q2 is connected with an external MCU (Microprogrammed Control Unit) and is used for controlling the conduction state of the triode Q1 during power failure; and the load circuit is connected with the power supply input end VCC-IN and the bleeder circuit, and the load circuit comprises an electrolytic capacitor U1. According to the utility model, through controlling the conduction of the triode Q1, the rapid discharge of residual electricity is realized, the abnormal reset starting problem caused by incomplete power failure when the circuit is connected with the power supply again is avoided, the circuit design is simple and reliable, the realization is easy, and the stability and reliability of the circuit are improved.

The application provides a dynamic sliding mode based attitude control method for an underactuated non-minimum phase RLV, which can realize accurate tracking control of longitudinal and lateral attitudes and stabilize the sideslip angle to zero by using only two movable flaps of the RLV, and solves the underactuated non-minimum phase control problem in the reentry process of the RLV. The control design is relatively simple, and has certain robustness to system state and parameter changes.

The application discloses a quantum sensor chip packaging structure capable of realizing wafer-level planar co-packaging, which comprises a microfabricated atomic cell, a light source chip assembly and a light detection chip assembly, the microfabricated atomic cell is integrated with a reflecting element, the reflecting element is used for adjusting the optical path of the light beam entering the microfabricated atomic cell, the microfabricated atomic cell, the light source chip assembly and the light detection chip assembly are supported on a packaging substrate through a micro-bump assembly and are directly electrically interconnected with the packaging substrate through the micro-bump assembly, the micro-bump assembly comprises a plurality of micro-bumps, the distribution mode of the micro-bumps is for the purpose of realizing the supporting function and the electrical interconnection, the size of the micro-bump supporting the microfabricated atomic cell, the light source chip assembly and / or the light detection chip assembly is adjustable, the optical path of the microfabricated atomic cell is regulated by adopting the combination of micro-bumps with different sizes, and the planar co-packaging of the microfabricated atomic cell and other key quantum sensor components can be realized.

The application discloses a sampling device for river deep water environment monitoring, which comprises a floating mechanism, a weight block and a sampling mechanism. The floating mechanism is arranged on the river surface and is provided with a solar panel at the top for power supply. A photographing module is arranged above the solar panel, and a control module is arranged in the floating mechanism. The weight block is arranged at the bottom of the river and is connected with the floating mechanism through a center pipe. A strip hole extending upward and downward is formed in the left side of the center pipe. The sampling mechanism is fixedly connected with the center pipe and is arranged between the floating mechanism and the weight block. The device and the control method are used for collecting river water samples of different water layers. The water flow is distributed through the drainage hole by using the water pump to drive the sampling box to sink, and the bottom sediments of the river are not washed up, so that the influence of the water sample is avoided. The sinking depth of the sampling mechanism is controlled by the pipe collecting and releasing. The river water of different depths is periodically sampled according to the requirement. The sampling process does not stir the bottom sediments, and the sampled river water can truly reflect the water quality data.