42results about How to "Output does not affect" patented technology

This invention discloses a method and a device for aligning phases of master and standby clocks, in which, the method includes: 1, setting a first master phase-locked loop and a first sub-phase-locked loop for the master clock and setting a second master phase-locked loop and a sub-phase-locked loop for the standby clock unit, 2, the master one controls a first clock signal to follow and lock the primary clock signal by opening the first sub-phase-locked loop and closing the first master loop, 3, the standby clock unit aligns the phases of the first and second clock signals by opening the second master loop and closing the second sub-loop and 4, the standby one reads the control value of the second-sub-loop following the first clock signal and controls that the phase of signals is the same when switching the master and sub-phase-locked loops according to the control value.

The invention discloses an active power filter based on a multiphase converter structure. The active power filter comprises a multiphase converter, a multiphase filter, a controller and a multiphase transformer. By adopting a multiphase compensation current generation device and a multiphase-to-three-phase converter structure and by using the characteristic that a multiphase PWM (pulse width modulation) converter has a plurality of control freedom degrees, the active power filter realizes low-voltage high power and is easier to realize on the premise that the direct serial and parallel connection of electronic power devices is avoided; compared with the existing multilevel active power filters, the structure of the active power filter is simple, the overall control is facilitated, the goal of perfect uniform coordinated output is realized and the energy density is high; since the converter adopts low-voltage power devices, the cost is reduced, the goal of fault-tolerant control is easy to realize, the corresponding phase is only required to be cut off when one phase or several phases have a fault, the overall output of a system is not influenced and the reliability is higher; and by changing the structure of the multiphase converter, the active power filter is also suitable for independent power supply systems of ships and the like, and the application scope is wide.

The invention provides a roller-hearth type creeper tread quenching press machine. The roller-hearth type creeper tread quenching press machine comprises a rack, wherein a driving roller which can reciprocate up and down is arranged above the rack, at least two rows of guide grooves are formed in the driving roller, press quenching upper molds corresponding to the guide grooves in the terms of number and location are arranged above the driving roller and are driven by a power device to reciprocate up and down, press quenching lower molds which correspond to the press quenching upper molds and are fixed are arranged below the driving roller, and the driving roller and the press quenching lower molds are arranged at intervals; the press quenching upper molds comprise upper mold plates and upper mold pressure feet which are connected to lower planes of the upper mold plates, the number of the upper mold pressure feet is at least two, the upper mold pressure feet are sequentially arranged along the axial direction of the driving roller, the distance between the adjacent upper mold pressure feed can be adjusted, the locations of the upper mold pressure feet can be flexibly adjusted according to different types of creeper treads along the direction of the driving roller, so that the upper mold pressure feet are pressed right above teeth of the creeper tread so as to prevent the creeper tread from deforming under the pressure of the upper mold pressure feet, thus the quenching quality of the creeper tread is improved.

The invention relates to a multi-path-output low-voltage-difference over-current protector comprising an input interface, an auxiliary power supply, a fault resetting and reporting circuit, a fault reporting interface, a differential current sampling circuit, an electronic switch, an error amplifier, a differential voltage comparator, and an output interface and the like. According to the invention, a P channel power MOS tube is used as an electronic switch; a low-voltage-difference shunt is used for carrying out sampling of a small current signal and then a differential amplifier is used foramplifying the small current signal; and the amplified signal and a current reference are sent to the error amplifier to carry out error amplification to control the opening degree of the power MOS tube. A constant-current state is realized under the condition of being larger than a rated current reference; and complete opening is carried out under the condition of being lower than the rated current reference. The differential voltage comparator is used for comparison between the voltage difference of the power MOS tube and the voltage reference to determine whether a fault exits.

The invention discloses a DC-DC module power supply which comprises an enclosure and a circuit mainboard arranged in the enclosure, the circuit mainboard comprises a primary-side circuit and a secondary-side circuit, the primary-side circuit comprises a power conversion circuit, a primary-side driving circuit and a primary-side control circuit, the power conversion circuit adopts a high-frequency power switch, an input DC voltage of 185-340V DC is converted into a 9V low-voltage DC output voltage by a transformer, the secondary-side circuit comprises a synchronous rectification circuit, a secondary-side driving circuit, a secondary-side control circuit and an isolation switch, the synchronous rectification circuit adopts a synchronous rectification switch for synchronous rectification, a low-voltage power pulse is converted into a smooth 9V DC through an output filter, and the smooth 9V DC is output through an anode confluence structure and a cathode confluence structure. The mainboard is reasonable in arrangement and compact in structure, has the advantages of small volume, high reliability, good heat dissipation performance, high anti-interference capability, high isolation and the like, and is mainly applicable for the fields such communication, aeronautics and astronautics and military.

The invention provides an online identification method for adjustment of a gas sensor of a coal mine safety monitoring system. The method comprises steps as follows: a, the gas sensor is controlled to output characteristic frequency in various adjustment states; b, the characteristic frequency is subjected to real-time analysis, and the adjustment states are identified; c, sensor operation is judged according to the identified adjustment states, and the adjustment process and time are counted. According to the online identification method for adjustment of the gas sensor of the coal mine safety monitoring system, a normal output frequency range of the sensor can be avoided, the sensor is adjusted by adopting the characteristic frequency, the normal output of the sensor is not influenced, and online identification of the adjustment states is realized through the real-time analysis of the characteristic frequency.

The present invention provides a Ge-Si heterojunction bipolar transistor detector based on antenna direct matching. The detector comprises a first Ge-Si heterojunction bipolar transistor and a secondGe-Si heterojunction bipolar transistor, the bases of the first Ge-Si heterojunction bipolar transistor and the second Ge-Si heterojunction bipolar transistor are connected with an antenna, emitting electrodes of the first Ge-Si heterojunction bipolar transistor and the second Ge-Si heterojunction bipolar transistor are earthed, a collector of the first Ge-Si heterojunction bipolar transistor is connected with an output end through a first quarter-wave microstrip line, a collector of the second Ge-Si heterojunction bipolar transistor is connected with the output end through a second quarter-wave microstrip line, a capacitor is connected between the base of the first Ge-Si heterojunction bipolar transistor and the collector of the second Ge-Si heterojunction bipolar transistor, the capacitor is connected between the base of the second Ge-Si heterojunction bipolar transistor and the collector of the first Ge-Si heterojunction bipolar transistor, and the direct current offset line in theantenna is connected with a direct current bias voltage. The output response of the detector is increased.

The invention provides automatic overturning equipment for middle groove double-sided welding. The automatic overturning equipment comprises a control system, an overturning mechanism, four conveyingmechanisms, a clamping mechanism and two lifting mechanisms, one pair of the conveying mechanisms are arranged inside the overturning mechanism in an upper and lower opposite manner, the other pair ofthe conveying mechanisms are connected with two opposite ends of the bottom conveying mechanisms inside the overturning mechanism correspondingly, the middle of any one of the conveying mechanisms isan unoccupied portion and two sides of any one of the conveying mechanisms are conveying portions, one of the lifting mechanisms is arranged at the unoccupied portion of one of the conveying mechanisms outside the overturning mechanism, an upper compressing component and a lower compressing component of the clamping mechanism are arranged at the unoccupied portions of the pair of the conveying mechanisms inside the overturning mechanism correspondingly, the control system is in electric connection with power sources of the overturning mechanism, the conveying mechanisms, the clamping mechanism and the lifting mechanisms, and when a large gear ring of the overturning mechanism rotates, two of the conveying mechanisms and the clamping mechanism are driven to rotate simultaneously. By meansof the automatic overturning equipment for middle groove double-sided welding, the efficiency is improved intelligently, the safety factor is improved, the application range is wide, and the stabilityperformance is improved.

The invention discloses a charging and discharging protection circuit and a lithium battery protection system, and the circuit comprises a battery protection circuit, a battery, a charger or a load, and an RC filter circuit. The RC filter circuit comprises a first resistor and a first capacitor, one end of the first resistor is connected with one end of the first capacitor and then connected witha VDD end of the battery protection circuit, and the other end is connected with a battery positive electrode; the battery protection circuit comprises a charging voltage protection circuit or a discharging voltage protection circuit, and further comprises a basic protection circuit, an AND gate, a driving circuit and a first MOS transistor, and the charging voltage protection circuit or the discharging voltage protection circuit and the basic protection circuit are connected with the input end of the AND gate. Through the cooperation of a second time delay circuit and a counter, the output ofa latch circuit controls the output of a logic circuit, the locking of a charging and discharging loop is realized by closing the first MOS transistor, and the situation that the battery is damaged due to repeated charging and discharging is avoided.

The invention discloses a device for safely lightening a prohibition light of a railway signaling machine after an all-electronic interlocking system fails. The device includes a red-light lighteningrelay and two safety relays; the normally open and normally closed contacts of the two safety relays keep in mutually exclusive states; the normally open contacts of the two safety relays can be output after merging to control the red-light lightening relay; the normally closed contacts of the two safety relays are independent and used for in real time detecting the output states of the safety relays; when the all-electronic interlocking system operates normally, the safety relays can output power sources, the red-light lightening relay can be sucked up through excitation, and the power supplyof the normally closed contacts can be cut off; and when the all-electronic interlocking system fails, the safety relays can cut off output, the normally closed contact of the red-light lightening relay and a red light of a signaling machine can form a loop, so that the red light can be lightened. The device can in real time detect the working states and abnormal conditions of a red-light lightening circuit so that the situations that circuits cannot be detected due to short circuit failure can be avoided; and the external red-light states cannot be influenced when a single circuit is detected, and the availability of the system can be enhanced.

The invention belongs to the avionics technology, and particularly relates to a self-detection circuit for a discrete quantity output interface. The circuit comprises a discrete quantity output channel unit, a detection point voltage acquisition unit, an optical coupling switch control unit, and a test voltage injection unit. The working states of channels are self-detected by configuring auxiliary optical coupling switches in a main channel. The self-detection circuit for the discrete quantity output interface realizes a self-detection function of rapid discovery and rapid response for the faults of the discrete quantity output interface with the low cost and the high stability.

The invention discloses a novel low-power-consumption MIPI current mode driver, and relates to the technical field of pre-emphasis current mode drive. The circuit comprises MOS tubes N1 to N6 and MOStubes P1, P2, N5 and N6, wherein the drain ends of the MOS tubes P1, P2, N5 and N6 are respectively connected with resistors R3 and R4; the resistors R3 and R4 are respectively connected with MOS tubes N7 and N8; when the MOS tube P1 outputs a current, the MOS tube P2 outputs a current, and the current is injected into the MOS tubes N7 and N8. Even if stray capacitance of outp and outn is very large, the appropriate pulse current injection can be adjusted, and the driving capacity of an MIPI output edge is improved, so the high-speed driving capacity of the MIPI is improved while low power consumption is guaranteed. According to the invention, a resistance matching scheme is added on the basis of the traditional MIPI pre-emphasis current mode drive, so the pre-emphasis pulse current can berandomly improved without generating output overshoot, and the MIPI common mode output is not influenced.

A sensing system for a computer input device. The sensing system comprises an actuator to attach to a key top or button. The actuator is moveable along an axis or hinged. The sensing system further comprises a biasing element to exert a biasing force on the actuator directed along the axis. The sensing system further comprises an actuator motion sensor associated with the actuator. The actuator motion sensor comprises a passive resonant circuit configured to be moved by the actuator and having a resonant frequency, an active resonant circuit configured to excite the passive resonant circuit atthe resonant frequency, a sensor driver to drive the active resonant circuit with an RF drive signal at the resonant frequency, and a detector to detect a level of RF signal from a driven actuator motion sensor for sensing a position and/or velocity of the actuator.

The invention belongs to an electro-hydraulic servo valve testing technology, particularly relates to a current output driver achieving deep negative feedback, wide range output and adjustable precision, and belongs to the technical field of testing. The invention provides a torque motor driver for electro-hydraulic servo valve testing. The toque motor driver comprises a box, a coil positive and negative connector assembly, an ammeter, a power switch, a power socket, a precision potentiometer and an integrated circuit plate. The torque motor driver achieves deep negative feedback, wide range output and adjustable precision and has a digital display function, so that the requirements of electro-hydraulic servo valve torque motor performance testing are met, wherein the requirements are that carrying is convenient, 220 V alternating current power supply is achieved, a dual-redundancy electro-hydraulic servo valve can be driven, the output current range ranges from -400 mA to 400 mA, and the precision is manually adjusted from -1 mA to 1 mA.