37results about How to "Amplitude adjustment" patented technology

The invention relates to an active anti-galloping device of an overhead power transmission line, and belongs to the technical field of power transmission line safety protection. According to the active anti-galloping device of the overhead power transmission line, a rack is adopted for transmitting rotation motions of a driving gear, and the design idea that one rotation motion is finally converted into two symmetrical rotation motions is realized. When galloping of the overhead power transmission line is restrained, the swing amplitude of pendulum bobs can be adjusted by combining the conductor galloping amplitude which is monitored in real time. After galloping acceleration signals caused by different wind speeds are monitored, conductor galloping acceleration signals are transmitted to a signal processing system through a conductor, the signals are processed by the signal processing system, and the processed signals are output to an anti-galloping control device through a conductor. The anti-galloping control device conducts recognition on the signals and outputs control instructions, the control instructions are transmitted into a stepping motor through a conductor and the stepping motor rotates by corresponding angles according to the control instructions so as to adjust the amplitude of the motions of the pendulum bobs.

The invention discloses an adjustable-amplitude quartz crystal microbalance self-excited oscillation circuit comprising a loop formed through an exciting signal feedback module and an amplitude regulating module. The exciting signal feedback module comprises an exciting crystal amplifier, a voltage follower, a subtracter, a low pass filter and an automatic gain control amplifier. The amplitude regulating module comprises a buffering amplifier, a voltage regulator and an amplitude amplifier. Sinusoidal signals produced by loop self-excited oscillation excite quartz crystal to oscillate, and a quartz crystal oscillation frequency signal Vf and an equivalent resistance signal VR are extracted and fed to outside for measurement. The amplitude of the exciting signals can be changed by regulating the voltage regulator in a numerical controlled manner, and the crystal oscillation amplitude regulation can be implemented.

The invention relates to a corrugated board cutting production line. The corrugated board cutting production line comprises a base and two symmetrically-arranged supporting frames perpendicularly fixed to the upper end face of the base. A cutting-off table capable of containing corrugated boards and a positioning plate capable of positioning a cutting-off assembly are fixedly connected between the two supporting frames. Each supporting frame is provided with a discharging port. The cutting-off assembly comprises two cantilever supports arranged on the lower surface of the positioning plate and a motor arranged on one cantilever support. A motor shaft of the motor is provided with a driving wheel, and the other cantilever support is provided with a driven wheel. The driving wheel and the driven wheel are in transmission connection through a belt. The belt is provided with a cutting-off tool assembly capable of cutting off the corrugated boards. A lifting moving assembly is arranged at the bottom of the base. In the daily use process, the position of the base can be adjusted through the lifting moving assembly, and the corrugated board cutting production line is convenient to use.

The invention discloses a vibrating screen with a vibrating screen surface and static screen box and aims to provide a vibrating screen which is low in energy consumption and foundation vibrating force and can be made in large size easily. The vibrating screen comprises a machine frame, a screen surface, a vibrating device and a transmission mechanism, wherein the transmission mechanism comprises a transmission rod, vibrating rods, rotating shafts, rotating shaft seats and a vibrating arm, wherein the vibrating device is connected with the transmission rods; the transmission rod is hinged with the vibrating rod, the vibrating rod is sleeved on the ends of the rotating shafts; the rotating shafts are arranged in the rotating shaft seats; at least two rotating shaft seats are arranged on each rotating shaft; the vibrating arms are arranged on the rotating shafts; the rotating shaft seats and the vibrating device are arranged on the machine frame; and the screen surface is fastened on the vibrating arms by bolts. The vibrating screen can be widely used in energy resource, metallurgical, ceramic, building material, chemical industries and other industries and mainly used for material grading and dehydration.

The invention discloses a multipath superimposed type high-frequency and high-voltage power supply based on DSP2812. The high-frequency and high-voltage power supply includes a DSP control circuit, a power conversion circuit and a power inverter circuit, wherein the power inverter circuit outputs one-path high-frequency and high-voltage alternating currents in a multipolar series connection mode, multipath level signals with same cycles are adopted to be superimposed into a group of sinusoidal waveform or square waveform voltage signals, and each path of level signals is modulated by a path of PWM waveform signals. The power supply achieves modulation on the frequency, amplitude and phase position of an output power supply, and has high intelligence and controllability.

The invention relates to a corrugated board cutting production line. The corrugated board cutting production line comprises a base and two symmetrically-arranged supporting frames vertically fixed to the upper end face of the base, a cutting-off table capable of containing a corrugated board and a positioning plate capable of positioning a cutting-off assembly are fixedly connected between the two supporting frames, and a discharging port is formed in one supporting frame. The cutting-off assembly comprises two cantilever supports arranged on the lower surface of the positioning plate and a motor arranged on one cantilever support, a driving wheel is arranged on a motor shaft of the motor, a driven wheel is arranged on the other cantilever support, and the driving wheel and the driven wheel are in transmission connection through a belt. A cutting-off tool assembly capable of cutting off the corrugated board is arranged on the belt, and a dust suction assembly used for sucking dust is arranged below the positioning plate. In the whole process, the automation degree is high, the machining efficiency is high, and harm to the body of an operator is reduced.

The invention discloses a vibrating screen, which is characterized in that a screen surface vibrates and a screen box does not vibrate. The purpose of the invention is to provide the vibrating screen which has the advantages that the power consumption is low, the vibration force to a foundation is small and the enlargement can be easily realized. The vibrating screen comprises the screen box, a frame, the screen surface, a vibration exciting device and a transmission mechanism, wherein the vibration exciting device is connected with the transmission mechanism, the vibration exciting device is arranged on the side plate of the screen box, the screen surface can be elastically connected with the vibrating arm of the transmission mechanism and can also be hinged with the vibrating arm of the transmission mechanism, the screen surface is elastically connected with the screen box, and the screen surface can be a single section or a combination of a plurality of sections. The vibrating screen can be widely used in industries such as energy, metallurgy, ceramics, building materials, chemical industry and the like, and is mainly used for the classification and the dehydration of materials.

The invention discloses a processing method and device for mixing multiple channels of audios in microphone data, and relates to the technical field of audio and video processing, and the method comprises the steps: receiving and decoding an audio mixing request of a user, and obtaining to-be-mixed audio data; superposing the audio data to be mixed; calculating the output amplitude of the mixed audio sample data; judging the output amplitude and a preset amplitude, and adjusting the output amplitude to obtain basic mixed audio data; intercepting data output by the microphone as recording data; and carrying out mixing processing on the recording data and the basic mixed audio data to obtain target mixed audio data, and sending the target mixed audio data to a process. According to the embodiment of the invention, the mixed audio data is added into the microphone data, so that calling and use are facilitated, interference of other audios on the mixed audio is avoided, the mixing effect of the recording data and the multi-channel audios is improved, and the situation that the microphone data acquired by other software on the system only has external environment sound is avoided.

The invention relates to the technical field of engineering machinery, in particular to a road roller. The road roller comprises a vibrating wheel which is internally provided with a main vibration exciter and at least one auxiliary vibration exciter, a compactness detector which is used for detecting the compactness of a compacted pavement and is arranged on one side of the vibrating wheel, a transmission mechanism which is arranged in the vibrating wheel, is connected with the main vibration exciter and the auxiliary vibration exciter and drives the main vibration exciter and the auxiliary vibration exciter to rotate, a driving mechanism which is arranged in the vibrating wheel and is connected with the transmission mechanism, and an amplitude modulation mechanism which is used for adjusting the angle between the main vibration exciter and the auxiliary vibration exciter according to the pavement compactness. After the road roller is compacted to a preset number of times, the compactness detector can detect the pavement compactness, and the frequency modulation mechanism adjusts the angle between the main vibration exciter and the auxiliary vibration exciter according to the pavement compactness obtained through detection, so that the compaction range of the road roller is widened, and the situation that the pavement is over-compacted is effectively prevented.

The invention discloses a power supply loop monitoring system. The system comprises a power acquisition module and a screening calibration module. The power acquisition module uses a power sampler J1with a model of YK-3D3 to acquire an output power signal of a power supply loop. The screening calibration module uses a triode Q1 and a triode Q2 to detect the output signal amplitude of the power acquisition module. Meanwhile, an operational amplifier AR2, a diode D2 and a diode D3 are used for forming a peak value circuit to screen peak value signals; one path of signal is subjected to phase shift by a phase shift circuit consisting of an operational amplifier AR3 and a capacitor C3; an inductor L1 and capacitors C4 to C6 are used for forming a frequency modulation circuit for stabilizing the signal frequency for the two paths of signals; and finally, the two paths of signals are input into a buffer circuit composed of an operational amplifier AR4 and a resistor R16 together, the signals are buffered and then sent into the power supply loop monitoring system terminal through a signal emitter E1, an early warning signal is conveniently triggered by the power supply loop monitoring system terminal, and the temperature of a power supply loop mainboard is prevented from being too high.

The invention discloses a reciprocating type branch variable-frequency and variable-amplitude vibration mechanism and an operation method thereof. The vibration structure comprises a frame, a motor, atransmission mechanism, a vibration frequency adjusting mechanism, an amplitude adjusting mechanism and a branch fixing mechanism, wherein the motor, the transmission mechanism, the vibration frequency adjusting mechanism, the amplitude adjusting mechanism and the branch fixing mechanism are installed on the frame. The reciprocating type branch variable-frequency and variable-amplitude vibrationmechanism provided by the invention is mainly used for researching the biomechanical properties of plant branches in agricultural engineering; and the reciprocating type branch variable-frequency andvariable-amplitude vibration mechanism, together with kinematics parameter testing equipment, explores the vibration response conditions and the vibration attenuation characteristics of various plantbranches under preset frequencies and amplitudes and different frequencies and amplitudes, so theoretical design and related data information can be provided for design of related agricultural machinery. Compared with a conventional mechanism, the reciprocating type branch variable-frequency and variable-amplitude vibration mechanism provided by the invention has the advantages of wide applicationrange, low manufacturing cost, convenient and easy operation and the like.

The invention discloses a variable excitation rolling wheel for a road roller. The wheel comprises a wheel body, a charging mechanism, buffer mechanisms, a balance mechanism and an excitation mechanism, wherein protruding blocks are arranged at the two ends of the wheel body. The charging mechanism is fixedly mounted on one side of the wheel body; the buffer mechanisms are symmetrically and fixedly installed in the wheel body. A fixed block is fixedly mounted at the output end of each buffer mechanism; a rotating shaft is fixedly mounted between the fixed blocks; one end of the rotating shaftis rotationally connected with a driving sleeve through a needle bearing; the driving sleeve is fixedly connected with the output end of a hollow shaft motor; one end of the driving sleeve is fixedlyconnected with the driving wheel; a mounting plate is fixedly mounted at one side of the driving wheel; and the excitation mechanism is fixedly mounted at the top end of the mounting plate. The variable excitation rolling wheel for the road roller has the advantages that the structure is simple, the operation is convenient and fast, the amplitude of the vibration in the equipment can be changed, the road rolling effect of the road roller is further improved, and the practicability is higher.