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66results about How to "Eliminate malfunctions" patented technology

Normal brake system used for airplane and having take-off line brake capability

The invention discloses a normal brake system used for an airplane and having take-off line brake capability. The normal brake system comprises a hydraulic brake valve, an electric valve, an electro-hydraulic servo valve, an anti-slip control box, a hydraulic switch and a speed sensor, wherein the hydraulic brake valve is mounted near a pedal mechanism under a bottom plate of a cockpit, controlled by operation of stepping on a brake pedal by a pilot and used for outputting a required brake pressure; the electric valve is mounted on a hydraulic pipeline at the downstream part of the hydraulic brake valve; the electro-hydraulic servo valve is mounted on a hydraulic pipeline at the downstream part of the electric valve; the anti-slip control box is mounted in a main landing gear cabin and powered by a power supply on the airplane; the hydraulic switch is mounted on a hydraulic pipeline between the hydraulic brake valve and a first oil inlet of the electric valve. The normal brake system can meet a braking demand of an existing normal brake system of the airplane on a take-off line, is reasonable in structure, simple, convenient, feasible, consistent with a man-machine engineering principle and favorable for reducing the burden of the pilot, and eliminates accident potentials caused by false operation of switching on a take-off line brake switch.
Owner:XIAN AVIATION BRAKE TECH

Novel surge control circuit

The invention relates to a novel surge control circuit and belongs to the technical field of electronic circuits. A relay rapidly works and is closed at the moment of powering-on. A power supply supplies power to a load through a thermistor NTC. Because of the characteristics of the thermistor NTC, supply current is kept in a stable and constant current state. When a capacitor in a load circuit is charged and works stably, the relay is opened, the power supply supplies power to the load through the normally-closed contact of the relay. Since the thermistor NTC and the normally-closed contact of the relay are connected in parallel, the thermistor NTC is disconnected and stops working. By detecting input voltage through an instantaneous comparison amplifier, when the power supply is turned off and is turned on again, the instantaneous comparison amplifier can output a resetting signal to reset a time-delay switching circuit, so as to ensure that the switching time of a time-delay switch is stable and the misoperation is eliminated when the time-delay switch is turned on or off at each time. Therefore, the requirement on the instantaneous power of the power supply is reduced, the damage rate of the thermistor NTC is greatly decreased, the power supply cost is reduced, the power consumption is extremely low because the novel surge control circuit is in a static state after surge control work is completed, and the common practicability and the good economic and technical efficiency are realized.
Owner:江苏普明光电科技有限公司

Synchronous rectification driving circuit

The invention discloses a synchronous rectification driving circuit. The synchronous rectification driving circuit comprises four MOS tubes connected to a power source end in parallel. The MOS tube a and the MOS tube b are connected with a power source. The four MOS tubes are connected with the primary level of a transformer, the secondary level dotted terminal of the transformer is connected with a synchronous rectification tube a and is connected with an output filter inductor in series, a secondary center tap of the transformer is connected with a set of output filter capacitors and a load in parallel, or the secondary center tap of the transformer is connected with the output filter inductor in series, and then the secondary center tap of the transformer and the synchronous rectification tube a are connected with the output filter capacitors and the load in parallel. The secondary non-dotted terminal of the transformer and a node between the synchronous rectification tube a and the output filter inductor are connected with the synchronous rectification tube b. An active pole voltage conditioning circuit is connected between the secondary non-dotted terminal of the transformer and the synchronous rectification tube a in parallel. An intelligent synchronous rectification control chip IR1167 is connected between the synchronous rectification tube b and the active pole voltage conditioning circuit in parallel. The combined circuit improves the stability of synchronous rectification driving, and the synchronous rectification tube error movement caused by parasitic oscillation is avoided.
Owner:西安唯电电气技术有限公司

Friction stir welding fixture in mechanical trigger control mode and method for controlling friction stir welding fixture

The invention discloses a friction stir welding fixture in a mechanical trigger control mode and a method for controlling the friction stir welding fixture. The friction stir welding fixture comprises a fixture base, a control unit, a trigger element, limit switches and a plurality of pressure plates; each pressure plate is connected with a pressure plate cylinder, each pressure plate cylinder corresponds to at least one limit switch and is controlled by the corresponding limit switches, and the limit switches and the pressure plate cylinders are connected with the control unit; and the trigger element and the limit switches are matched with one another and are mounted on a friction stir welding head. The pressure plate cylinders are controlled by the mechanical trigger type limit switches and the trigger element, possibility of malfunction of the pressure plate cylinders is eliminated, the pressure plates are driven by the pressure plate cylinders to be automatically opened before the welding head moves to the pressure plates during movement, and are reset to press workpieces after the welding head passes the pressure plates, the integral fixture is automatically controlled and is reliable in running, and the cost is lowered.
Owner:UNITED AUTOMOTIVE ELECTRONICS SYST

Plastic pipe mould cooling device capable of carrying out continuous circulating operation

The invention discloses a plastic pipe mould cooling device capable of carrying out continuous circulating operation. The plastic pipe mould cooling device capable of carrying out continuous circulating operation comprises at least two plastic pipe moulds, wherein each plastic pipe mould comprises at least two mould bodies which carry out circulating operation along annular rails, the mould bodies on the plastic pipe moulds are correspondingly arranged in a one-to-one mode, a cooling water cavity is arranged inside each mould body, and each cooling water cavity is communicated with a cooling water movement pipeline. Due to the fact that water inlets and water outlets of the plastic pipe moulds are connected with cooling water circulating pipelines in a one-to-one mode through water feeding pipelines and water discharging pipelines, a cooling water circulating channel is a totally-closed pipeline, leakage cannot easily happen, and the fault rate is low; due to the fact that operation of the cooling water feeding pipelines, the cooling water discharging pipelines and operation of rotation pipeline converters are in continuous same-direction movement, movement impact is low, and the service life is long; due to the fact that a drive system is in gear drive and chain wheel and chain drive, the drive ratio is constant, the same power source is used by the drive system and is used for drive of the plastic pipe moulds, and elimination of malfunctions is ensured. The plastic pipe mould cooling device capable of carrying out continuous circulating operation has the advantages of being high in cooling efficiency, stable and reliable in operation, and capable of carrying out high-speed and high-efficiency operation.
Owner:青州市塑霸机械有限公司

PTC (Positive Temperature Coefficient) over-current protection component capable of eliminating accumulated heat influence

The invention discloses a PTC (Positive Temperature Coefficient) over-current protection component capable of eliminating accumulated heat influence. The PTC over-current protection component comprises a polymer-based PTC core layer, contact electrodes compounded on two sides of the core layer, and two conductive pins, wherein at least one of the two conductive pins is a thermoelectric semiconductor material; surface mount of the thermoelectric semiconductor pin has directionality; the thermoelectric semiconductor pin is mounted on one side on which current flows out; an N-type semiconductor is mounted on one side on which current flows in; one end, which is far away from the PTC chip, of the pin is radiated when the component works; and one end of the pin mounted on the chip electrode absorbs heat so as to achieve an effect of eliminating the PTC accumulated heat. Compared with the traditional PTC over-current protection component, the PTC over-current protection component disclosed by the invention has the advantages that the PTC chip is locally cooled in a low-current state by the two thermoelectric semiconductors, false operations caused by time accumulation joule heat are eliminated, and the component only performs over-current protection on transient joule heat generated by a high-current state.
Owner:上海萃励电子科技有限公司
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