34results about How to "Work status impact" patented technology

In a high-frequency power amplifier of the present invention, when a short circuit occurs between a gate or source or between a base and emitter in one of unit cells comprising a multi-cell, influence on the operations of the other normal unit cells is suppressed by a direct-current interrupting characteristic of a diode disposed for each of the unit cells.

The invention discloses an automatic plate rolling device for a corrugated box printing machine, which comprises a printing roller, a limit sleeve and a driving box. A shaft groove is opened on the printing roller, and a plate hanging shaft is rotatably connected in the shaft groove. The surface of the printing roller is covered with an offset plate, the printing roller is fixedly interspersed with a central shaft, and one end of the hanging shaft is fixedly interspersed with a hanging gear, and the limiting sleeve rotates on the frame of the printing machine. The box is fixed on the frame of the printing machine. A drive motor is fixedly installed in the drive box. The output end of the drive motor is fixedly connected with an output shaft, and a driving gear is fixedly interspersed on the output shaft. The inner wall of the drive box The symmetrical rotational connection has a first threaded shaft. In the present invention, the printing roller is rotated by 90 degrees through the printing machine, and the plate-hanging gear revolves around the roll-up gear. Due to the meshing effect of the two, the plate-hanging gear drives the plate-hanging shaft to rotate, thereby automatically locking the offset plate. .

The invention provides a method for measuring a Pohl resonance phase difference by using photogates and relates to the field of physical experiment parameter measurement. The method replaces a stroboscopic method for measuring the Pohl resonance phase difference. According to the technical scheme, a rocker light blocking piece is fixed to the top of a rocker of a Pohl resonance instrument, a swing wheel light blocking piece is fixed to the upper end of a swing wheel, the swing wheel light blocking piece and the rocker light blocking piece can both pass through the interval photogate in the swing process, and the interval photogate is made to start timing or stop timing. The swing wheel light blocking piece or the rocker light blocking piece passes through the cyclic photogate in the swing process. After forced vibration is stabilized, the time difference delta T of the swing wheel light blocking piece and the rocker light blocking piece arriving at the same position is measured through the interval photogate, the swing cycle T is measured through the cyclic photogate, and the phase difference is 360-degree*delta T / T. The method for measuring the Pohl resonance phase difference by using the photogates has the advantages that a flash lamp is not used, and thus the influences of large currents on the working state of an electronic circuit are avoided; the method for replacing the stroboscopic method for measuring the phase difference is proposed, and the prior art is enriched.

The invention discloses a stepless adjustable heavy current generation circuit used for driving an electromagnetic actuator, which comprises a processor, a digital-analog converter, a voltage comparator, an isolated-form power tube driver, an isolated-form operational amplifier, a current sample module and an insulated gate bipolar transistor. The processor is connected with the digital-analog converter; the digital-analog converter is connected with the voltage comparator; the voltage comparator is connected with the isolated-form power tube driver; the isolated-form power tube driver is connected with the insulated gate bipolar transistor; the isolated operational amplifier is connected with the voltage comparator; the current sample module is connected with the isolated operational amplifier, and is connected with the positive input end of the electromagnetic actuator; the collector input end of the isolated gate bipolar transistor is connected with the reverse input end of the electromagnetic actuator. The invention has the advantages of high circuit reliability to prevent industrial accident, convenient set of the driving current value and accurate and reliable stepless adjustment.

The invention relates to the technical field of monitoring systems, and provides an angle-adjustable heat dissipation dustproof monitor which comprises a monitoring camera body, a power mechanism, a supporting mechanism and a dustproof mechanism. A substrate in the power mechanism is fixedly connected with a supporting seat at the top, a driving motor is arranged in the supporting seat and an output shaft is connected with a rotating rod, and the top end of the rotating rod is fixedly connected to the bottom of the camera body; one end of the supporting mechanism is rotatably connected with the substrate, and the other end is fixedly connected with the bottom of the camera body; a dustproof cover in the dustproof mechanism is slidably connected with the camera body, sliding grooves are formed in the two sides of the dustproof cover, connecting blocks are slidably connected into the sliding grooves, and the connecting blocks are fixedly connected with a dustproof filter screen; a through hole formed in the top of the dustproof cover is fixedly connected with a connecting sleeve, a pressing rod is slidably connected in the connecting sleeve, the bottom end of the pressing rod is fixedly connected with a dustproof filter screen, the top end is fixedly connected with a pressing plate, and the pressing rod is sleeved with a compression spring. Dustproof can be achieved in the monitoring heat dissipation process, a dustproof mechanism can be simply, rapidly and stably installed, the supporting stability of the monitoring body is improved, and the monitoring angle can be adjusted.

The present invention proposes an emergency stop device with a simple structure, low production cost, and a switch assembly that can freely switch working modes, including a housing, and the upper part of the housing is provided with a first contact piece, a second contact piece, and a housing There is a first connecting piece that can slide up and down in the body, a first elastic member is arranged between the first connecting piece and the casing, a first button is arranged on the casing that can slide up and down, and a button is arranged between the first button and the casing. There is a second elastic member that keeps the first button away from the first connecting piece. One end of the first button passes through the casing, and the casing can slide up and down. A second button is provided. The third contact piece and the fourth contact piece that are kept in contact with the second contact piece, the first button is provided with a second connecting piece that can be in contact with the third contact piece and the fourth contact piece, the second button and the housing A positioning device for switching the working position of the second button is arranged between them.

The method for measuring the phase difference of Bohr resonance with a digital oscilloscope relates to the field of physical experiment parameter measurement. The invention proposes a method for measuring Bohr resonance phase difference instead of the stroboscopic method. The technical solution is: fix a touch claw on the balance wheel and the rocker respectively, and the touch claw is in the shape of "7"; hang soft conductive wires above the balance wheel and the rocker; the balance wheel swings until the touch claw touches the soft conductive wire. Connect the circuit to the power supply, and output a pulse voltage at the open end, and connect the open circuit voltage generated by the upper end of the balance wheel and rocker to the X and Y input ports of the dual-trace digital oscilloscope respectively; the time passed by the digital oscilloscope Measurement tool, take one of the input signals, measure the period T of the vibration on the oscilloscope display, and then measure the time interval △T between the high levels of the two signals, at △T <t 2时，位相差为360o *△T / T. The beneficial effect is: the influence of the working state of the electronic circuit of the large current instrument is avoided; the prior art is expanded.< / t>

The invention discloses a dowty retarder real time monitoring system and a method based electromagnetic induction. The device comprises an electromagnetic induction module. The electromagnetic induction module is used for detecting an electromotive force generated by the sliding oil cylinder of the dowty retarder when a train passes; the voltage data output by the electromagnetic induction moduleis sequentially transmitted to a voltage amplification filter module and an analog-to-digital conversion module for processing. The analog-to-digital conversion module converts the data into a digitalsignal and then transmits the data to a monitoring platform through a wireless transmission module. A monitoring platform judges the working state of the dowty retarder according to the electromotiveforce generated by the electromagnetic induction module. The real-time and on-line monitoring of the dowty retarder in the hump speed regulation system of the railway marshalling station can be realized. The dowty retarder with problem can be found in time. The occurrence of accidents can be reduced and the efficiency is improved.

The invention discloses a ring-shaped temperature sensor for measuring the temperature of a transistor, which comprises: a ring-shaped P-type heavily doped region, a ring-shaped N-type heavily doped region sequentially arranged in the active region of the transistor from inside to outside. Region, ring anode, ring N well region and ring P well region; and ring cathode, the ring cathode is arranged in the ring N-type heavily doped region; wherein, the ring cathode is short-circuited with the source of the transistor .

The invention discloses a method and a device for diagnosing and processing faults of hydrogen in a hydrogen fuel cell. A hydrogen concentration sensor and a temperature sensor are installed at the outlet of a drainage and exhaust device of a hydrogen supply system of the fuel cell. When the drain exhaust device starts pulse discharge, the sensor data in one pulse discharge cycle is recorded, and the hydrogen concentration algorithm is used to calculate the hydrogen concentration in the hydrogen supply system. The hydrogen concentration algorithm relies on the calibration experiment, and establishes the functional relationship between the sensor data and the hydrogen concentration in the hydrogen supply system through the existing experimental data. When it is detected that the hydrogen concentration in the hydrogen supply system is lower than the threshold value, the pulse discharge is actively turned on, and the hydrogen concentration in the hydrogen supply system is restored by continuously exhausting to complete the troubleshooting. The present invention directly measures the hydrogen concentration in the hydrogen supply system, so that faults can be found in time and handled quickly.