43results about How to "With redundant function" patented technology

The invention provides a high-accuracy multipath data synchronous acquisition device and relates to a high-accuracy multipath data synchronous acquisition technology. In the high-accuracy multipath data synchronous acquisition device, the GPS pulse-per-second signal output end of the a GNSS device is connected with the GPS pulse-per-second signal input end of a high-accuracy multipath time service module, the high-accuracy multipath time service module comprises multiple level pulse-per-second signal output ends, one level pulse-per-second signal output end is connected with a standard device, and other level pulse-per-second signal output ends are connected with tested devices. The high-accuracy multipath time service module further simultaneously sends a TTL level pulse-per-second signal to an industrial control mainframe through a high-speed optical fiber serial bus. The standard device and the test signal output ends of the tested devices are respectively connected to one test signal input end of an interface module. The synchronous performance of the high-accuracy multipath data synchronous acquisition device can be remarkably improved, hardware integration can be further improved, the size is greatly decreased, the information transmission rate and reliability are improved, a memory device has a shake-proof function, and the high-accuracy multipath data synchronous acquisition device is suitable for testing of a ship system.

The invention discloses a lifting device gravitational potential energy pressure-volume storage system. According to the system, an electro-hydraulic compound energy recovery system is additionally arranged based on a lifting mechanism hydraulic cylinder inlet and outlet oil port system and is further composed of a hydraulic motor / pump, a motor / electric generator, a super-capacitor module and an energy accumulator. An inlet / outlet oil port of the hydraulic motor / pump communicates with a lifting hydraulic cylinder through a control valve, and the other oil port of the hydraulic motor / motor communicates with the energy accumulator. An output shaft of the hydraulic motor / pump is connected with an output shaft of the motor / electric generator. The super-capacitor module is connected to a rotary speed controller DC bus of the motor / electric generator. According to the lifting device gravitational potential energy pressure-volume storage system, the gravitational potential energy in the dropping process of the lifting mechanism is stored into the energy accumulator and a super-capacitor without throttling losses through the hydraulic motor / pump and the motor / electric generator, the part of energy stored can be recycled without throttling losses, machine working efficiency is improved, operating cost is reduced and emission pollution of an engine is reduced.

The invention discloses a nested ball lead screw pair, and relates to the field of electromechanical servo. The nested ball lead screw pair comprises an outer lead screw nut, an outer lead-screw screwrod, an inner lead screw nut, an inner lead-screw screw rod, a transmission gear, a flat key, a brake rotor, a brake stator and a shell; the outer lead-screw screw rod is mounted on the outer wall ofthe inner lead screw nut in a sleeving mode, the outer lead screw nut is mounted on the outer wall of outer lead-screw screw rod in a sleeving mode; the transmission gear and the outer lead screw nutare connected through the flat key; the inner lead-screw screw rod extends into the inner wall of the inner lead screw nut in the axial direction; the outer wall of one end of the axial direction ofthe inner lead-screw screw rod is wrapped with the brake rotor, and the outer wall of the brake rotor is wrapped with the brake stator; the shell is fixedly mounted on the outer wall of the inner leadscrew nut in a sleeving mode; and the shell and the inner lead screw nut are connected through a second guiding key. According to the nested ball lead screw pair, the lead screw pair has the characteristics of double redundancy, an outer lead screw is a main working transmission pair, an inner lead screw serves as a backup, and the fact that the lead screw pair can continue to work in the case offirst-stage breakdown is ensured.

A single-probe three-coil maglev train gap sensor with a fault location function, including a controllable high-frequency switch connected to a high-frequency signal source on the car body, a probe coil connected to the controllable high-frequency switch, and a signal signal connected to the probe coil A detection circuit, a self-diagnosis unit connected with the signal detection circuit. The input terminals of the three detection coils in the sensor and the probe are respectively connected with three high-frequency signal sources through three controllable high-frequency switches; the output terminals of the three detection coils are respectively connected with mutually independent signal detection circuits; The frequency switch and the signal detection circuit are also connected with the timing controller (T); the three signal detection circuits output three independent air gap detection values. When a single-channel detection fault occurs, the fault diagnosis unit outputs fault location information, indicating the location of the faulty detection channel. It can still provide effective real gap value when a single path failure occurs, and has a redundant function.

The invention relates to a safety brake and redundancy control system of a mine hoist. Detection signals of a roller rotation speed sensor and a motor rotation speed sensor are input into a speed redundancy detector, the processed detection signals are input into a speed signal comparer, compared with a command signal, and then input into a speed closed-loop controller, the speed closed-loop controller transmits the signals to a pressure signal comparer and a pressure feed-forward controller, the pressure signal comparer compares a signal of a pressure sensor and an output signal of the speed closed-loop controller, a comparison result is input into the pressure speed closed-loop controller, and a signal of the speed closed-loop controller is input into an adder through a switch to form a control signal of a tee proportional depressurization valve; and when the pressure sensor is cut off, the output signal of the speed closed-loop controller is input into the adder after being processed by the pressure feed-forward controller, and an output signal of the adder controls the tee proportional depressurization valve, so that the braking torque is controlled. The safety brake and redundancy control system is high in control precision and response speed, and the mine hoist can brake at constant retarded velocity.

This application provides an electric vehicle charging circuit and an electric vehicle. The electric vehicle charging circuit can realize the normal power supply of the low-voltage battery after the first DC / DC converter for charging the low-voltage battery unit fails by adding a second secondary side circuit of a backup transformer and a second secondary side winding of the transformer , so that the battery charging circuit has a redundant function, and the cost is low and the size is small.