17 results about "Sinusoidal oscillation" patented technology

An apparatus for mixing and / or conditioning powdery materials through fluid-free fluidization comprises a movably supported container that defines a first processing chamber for receiving powdery material; an oscillation generator by which a powdery material located in the processing chamber can be subjected to an oscillation, in particular a sinusoidal oscillation, during operation; and a control unit that controls the oscillation generator.

Resolver (1) with a resolver rotor (2) fixed to a rotating shaft (4) and a resolver stator (3) arranged around the resolver rotor (2), wherein the resolver stator (3) has a plurality of projecting poles (31) provided on an annular stator core (30) projecting inward in the radial direction and arranged at equal distances in the circumferential direction, wherein the resolver rotor (2) has an outer peripheral surface (11) defined by an outer diameter obtained by combining a second function, in which the inverse of an air gap between the resolver rotor (2) and the salient poles (31) is proportional to a sinusoidal oscillation with respect to the angle (ϕ) of the resolver rotor (2), with a first function, in which the air gap is proportional to the sinusoidal oscillation, in a certain ratio, wherein the ratio is set to be greater than 0 and is set to a value which is greater the smaller a modulation is which represents a varying amplitude of an output signal of the resolver (1) with respect to the mean value of the output signal, and characterized in that the outer diameter is calculated based on the angle (ϕ), a stator inner diameter representing the length from the rotation center of the shaft (4) to the end face of the salient poles (31) on the radially inner side, the ratio, and a predetermined maximum (Gmax) and minimum (Gmin) air gap according to the following equation (A): Rm ( ∅ ) = Rs − { α × Gip ( ∅ ) + ( 1 − α ) × Gp ( ∅ )} where Gp ( ∅ ) = { ( Gmax − Gmin ) sin ∅} / 2 + ( Gmin + Gmax ) / 2 Gip ( ∅ ) = 1 [ { 1 Gmax − 1 Gmin 2} sin ∅ + 1 Gmin + 1 Gmax 2 ] Rm(ϕ): outer diameter ϕ: Angle in the coordinate system of the resolver rotor outer diameter Rs: Stator inner diameter α: ratio Gp(ϕ): first function Gip(ϕ): second function Gmax: Maximum value of the air gap Gmin: Minimum value of the air gap

The application discloses a boosting ignition circuit and belongs to the technical field of fuzes. The boosting ignition circuit comprises a main controller, a sinusoidal oscillation circuit, a shaping circuit, a boosting circuit and an ignition control circuit. The boosting ignition circuit solves the technical problem of high reliability of fuze ignition. The boosting ignition circuit is stable and reliable, and double gate control guarantees safety. The boosting ignition circuit can be applied in applications with small ignition current demand.

Manufacturing process for corrosion-resistant and low-temperature-resistant continuous cast steel billets for wind power, characterized in that it comprises the following steps: S1, steel production in an electric furnace: oxygen is blown into the electric furnace for decarburization and phosphorus removal; after slag formation, slag is blocked and steel is tapped to obtain a steel melt; S2, low-temperature refining: a low-temperature refining furnace is used for homogenization by blowing argon into a ladle bath, for deoxidation, desulfurization, and removal of inclusions from the steel melt obtained in S1; S3, vacuum degassing: a vacuum degassing furnace is used for gas removal;S4, Continuous casting: the molten steel treated in S3 is continuously cast to form a continuous casting billet, this process comprising three sub-steps: S41, a ladle is transferred to a continuous casting machine for casting and the molten steel passes through a ladle nozzle into a tundish; S42, after a level of molten steel has risen to a starting position for casting, continuous casting begins, with the molten steel flowing into a mold, employing a three-stage crystallization process during crystallization: in an initial stage, i.e., in the first 15 minutes of the total casting time, the mold uses a non-sinusoidal vibration, this vibration process occurring with an amplitude of ±4.5 to 5 mm, a vibration frequency of 120 to 130 min-1 and a correction rate a of 19.6% to 20.3%;In an intermediate stage, i.e., from the completion of the initial stage until 30 minutes before the end of casting, the mold uses a sinusoidal oscillation together with electromagnetic stirring, this oscillation process occurring with an amplitude of ±4 to 4.5 mm, an oscillation frequency of 130 to 140 min-1 and an electromagnetic stirring current of 260 to 270 A; in a late stage, i.e., from the completion of the intermediate stage until the end of casting, the mold uses a non-sinusoidal oscillation, the oscillation process occurring with an amplitude of ±3 to 3.5 mm, an oscillation frequency of 140 to 150 min-1 and a correction rate a of 22.1% to 23.6%; S43, the billet is pulled from the mold and then proceeds to the next process;S5, Aging by slow cooling: a continuously cast round billet is rapidly placed in a slow cooling pit at a temperature of 900 to 950 °C, using a progressive slow cooling approach from very slow cooling to medium slow cooling to weak slow cooling, where the very slow cooling lasts 8 to 9 hours, uses a sealed slow cooling lid and is carried out at a cooling rate of 5 to 8 °C / h, where the medium slow cooling lasts 5 to 7 hours, uses a semi-sealed slow cooling lid and is carried out at a cooling rate of 20 to 30 °C / h, where the weak slow cooling lasts 10 to 20 hours, uses an open slow cooling lid and is carried out at a cooling rate of 50 to 80 °C / h, subsequently yielding a continuously cast steel billet for wind power;wherein in the continuously cast steel billet for wind power, an ACN phase in the range of 0.1 to 5.5 micrometers is formed at a grain boundary, where A in the ACN phase refers to Nb, V, and Ti; wherein within the grain boundary, a copper-rich nanophase in the range of 0.3 to 3.8 nanometers is dispersed and distributed; wherein the constituents of the continuously cast billet in mass percent are as follows: C: 0.085% to 0.096%; Si: 0.18% to 0.20%; Mn: 0.8% to 1.0%; Cr: 0.28% to 0.32%; V: 0.49% to 0.52%; Nb: 0.036% to 0.052%; Mo: 0.38% to 0.42%; Al: 0.025% to 0.035%; Ti: 0.059% to 0.087%; Ni: 0.93% to 0.97%; Cu: 0.11% to 0.17%; N: 0.015% to 0.018%; P: ≤0.007%; S: ≤0.004%; O: ≤20 ppm and the remainder is Fe.

Linear actuator comprising a first element (1) that is movable in one direction relative to a second element (2), wherein the first element (1) comprises a first magnet (6a), a second magnet (6b) and a third magnet (6c) arranged in that direction, wherein the first magnet (6a), the second magnet (6b) and the third magnet (6c) each have N-poles and S-poles in a direction perpendicular to that direction, wherein the N poles and the S poles of the second magnet (6b) are displaced relative to the N poles and the S poles of the first magnet (6a) in a direction perpendicular to that direction, wherein the N poles and the S poles of the third magnet (6c) are displaced relative to the N poles and the S poles of the second magnet (6b) in a direction perpendicular to that direction, wherein the second element (2) has at least two projecting poles (8a) arranged in the direction perpendicular to that direction and facing the first element (1), and at least two coils (4a, 4b, 4c, 4d) arranged in the direction perpendicular to that direction and each wound around the projecting poles (8a), and including at least two coils (4a, 4b, 4c, 4d): an A-phase coil (4a) and a B-phase coil (4b) that is phase-shifted by 90 degrees relative to the A-phase coil (4a), the A-phase coil (4a) and a / B-phase coil (4d) which is phase-shifted by 270 degrees to the A-phase coil (4a), an / A-phase coil (4c) and the / B-phase coil (4d) which is shifted by 90 degrees relative to the / A-phase coil (4c), the / A-phase coil (4c) and the B-phase coil (4b), which is phase-shifted by 270 degrees to the / A-phase coil (4c), or a coil (4a, 4c) that is magnetized by the sine oscillation and a coil (4b, 4d) that is magnetized by a cosine oscillation.

One example is extending the measurable distance while ensuring safety for the human body. [Solution] The measuring device (10) is a device that measures an object by scanning it with pulsed light. The measuring device (10) comprises a light-emitting element (12), a light-receiving unit (14), a movable mirror (16), and a control unit (18). The light-emitting element (12) emits pulsed light. The light-receiving unit (14) receives the reflected pulsed light. The movable mirror (16) changes the direction of emission of the pulsed light. The control unit (18) controls the light emission intensity of the light-emitting element (12). In the measuring device (10), the reflective surface of the movable mirror (16) is oscillated sinusoidally, causing the direction of emission of the pulsed light to move back and forth in the first direction (101). The control unit (18) emits pulsed light of higher intensity in the end region (112) including the end of the first direction (101) of the scanning range than in the central region (114) including the center of the first direction (101) of the scanning range.

The embodiment of the invention provides a differential capacitance displacement transducer. The differential capacitance displacement transducer comprises a sinusoidal oscillation circuit, a capacitor bank, an addition amplification circuit, a differential comparison circuit and a demodulation filtering amplification circuit, the sinusoidal oscillation circuit is used for generating a differential sinusoidal oscillation signal of which the peak-to-peak value is a positive and negative first voltage value and applying the differential sinusoidal oscillation signal to a first movable pole plate and a second movable pole plate of the capacitor bank; the addition amplification circuit is used for carrying out addition calculation on the differential sinusoidal signals output by the fixed pole plate of the capacitor bank and outputting sinusoidal signals; the differential comparison circuit is used for carrying out comparison calculation on the differential sinusoidal signal and outputting a square wave signal with the same phase as the differential sinusoidal signal; and the demodulation filtering and amplifying circuit is used for rectifying the sinusoidal signal by using the square signal, filtering and amplifying the rectified sinusoidal signal, and outputting a detected vibration voltage signal. According to the differential capacitance displacement transducer, detection of tiny vibration signals can be achieved, noise interference is reduced, and the detection precision is improved.

The application discloses a kind of regularized constraint heat transfer coefficient dynamic determination method and system.The application introduces sine oscillation in jacket temperature, data is divided into sliding window;Linear model containing low-frequency term and simple harmonic term of the same frequency is constructed in window, and the energy balance equation is established by extracting the same frequency complex amplitude;Further, the least square target function with regularization term is constructed with the estimation value of the previous window as prior, and the non-negative constraint based on the interpolation of the boundary before and after reaction is applied, and the UA dynamic evaluation is realized by cyclic solution.The application effectively decouples non-steady-state drift and noise, suppresses numerical mutation, obtains smoother and more physical law heat transfer coefficient and heat release rate result, and significantly improves the robustness of complex reaction process calorimetry.

Technique and mechanism for processing polyphonic audio signals. Processing includes filtering the audio signals to generate a set of narrow band signals, estimating an instantaneous magnitude and frequency associated with the narrow band signals and driving a bank of sinusoidal oscillators based on the instantaneous magnitude and frequency to create an output audio signal.

A method implemented in an audio synthesis device for synthesizing an audio signal is provided. The method includes determining a first plurality of harmonics based on a sinusoidal oscillator, at least two of the first plurality of harmonics being calculated in parallel, scaling the first plurality of harmonics according to a scaling parameter, determining a first sum of the first plurality of scaled harmonics to generate a first sample of the plurality of samples, determining a second plurality of harmonics based on the sinusoidal oscillator, at least two of the second plurality of harmonics being calculated in parallel, scaling the second plurality of harmonics according to the scaling parameter, determining a second sum of the second plurality of scaled harmonics to generate a second sample of the plurality of samples, and causing playback, on the speaker, of at least the first sample and the second sample.

The invention relates to a method for vibration damping in a traction drive train (20), comprising the method steps: - Providing (S10) a speed signal (S) of a traction motor; - performing (S20) a bandpass filtering of the speed signal (S) in order to obtain a vibration signal (S BP ) to extract - Determine (S30) the amplitude (A(S BP )) of the bandpass filtered oscillation signal (S BP ); - Normalization (S40) of the bandpass filtered oscillation signal (S BP ) by using the bandpass filtered oscillation signal (S BP ) by its amplitude (A(S BP )) to obtain a normalized signal (S BP,norm ) whose value range is in the range [-1,+1], - Further processing (S50) of the standardized signal (S BP,norm ) to provide a damping torque signal (M D ), where the amplitude (A(M D)) of the damping torque signal (M D ) either via a feedback factor (K) or via a freely selectable amplitude (A(M D )) and the amplitude (A(M D )) of the damping torque signal (M D ) is limited so that the damping torque signal (M D ) maintains a sinusoidal oscillation form, so that by limiting the amplitude (A(M D )) of the damping torque signal (M D ) a uniform and stable vibration damping in the traction drive train (20) is achieved, thereby increasing driving comfort and reducing the stress on the mechanical components.

Technique and mechanism for processing polyphonic audio signals. Processing includes filtering the audio signals to generate a set of narrow band signals, estimating an instantaneous magnitude and frequency associated with the narrow band signals and driving a bank of sinusoidal oscillators based on the instantaneous magnitude and frequency to create an output audio signal.

A method for determining a longitudinal tire stiffness (Kx) for at least one wheel on a motor vehicle while the motor vehicle is in operation, may include generating a sinusoidal modulation of an axle drive torque or wheel drive torque necessary for maintaining the current vehicle speed (v), or a braking torque or recuperation torque necessary for maintaining the current braking power in at least one wheel for a sinusoidal excitation of a wheel rotational rate (ω), such that a sinusoidal oscillation in the wheel rotational rate is induced. The method may also include detecting the resulting sinusoidal oscillation in the wheel rotational rate, determining the amplitude (ωamp) of the oscillation in the wheel rotational rate induced, and determining longitudinal tire stiffness (Kx) from the amplitude (ωamp). A corresponding apparatus for carrying out the method may be included.

The invention discloses a vibration electrode structure for electrostatic detection and a verification method thereof, and belongs to the field of electrostatic measurement. A static detection electrode with a symmetrical structure is arranged towards the static power supply; the electrostatic detection electrode comprises a fixed electrode, a vibration electrode and a piezoelectric ceramic electrode, the fixed electrode, the vibration electrode and the piezoelectric ceramic electrode are fixedly connected into a whole; the piezoelectric ceramic electrode completely covers and is connected with the connecting end surfaces of the fixed electrode and the vibration electrode; the longitudinal axis of the static detection electrode faces the static power supply; and an electrostatic charge induction electrode is arranged on one side, facing the static power supply, of the vibration electrode. The fixed electrode is fixedly connected to the circuit board; a sinusoidal voltage is applied to the fixed electrode, and the vibration electrode is connected with a zero-volt voltage to drive the piezoelectric ceramic electrode in the middle, so that the piezoelectric ceramic electrode forms longitudinal wave type back-and-forth movement / vibration in the detection direction, and finally, a standard sinusoidal oscillation capacitor is formed between the vibration electrode and the electrostatic charge induction electrode. And a standard sinusoidal voltage signal is formed on the electrostatic charge induction electrode.

The utility model relates to the technical field of key detection circuits, and relates to a key detection circuit and electronic equipment. The circuit comprises a key circuit which comprises a plurality of key resistors and a plurality of key switches, and the plurality of key resistors are respectively connected with the plurality of key switches in series; the self-excited oscillation circuit is connected with the key circuit through a transformer; the key circuit is configured to connect the first key resistor to the self-oscillation circuit through the transformer, and the self-oscillation circuit is configured to adjust the amplitude of the sinusoidal oscillation signal based on the resistance value of the first key resistor; the detection circuit is connected with the output end of the self-excited oscillation circuit and is configured to determine a direct-current voltage signal based on the sinusoidal oscillation signal; and the detection circuit is connected with the output end of the detection circuit and is configured to determine the conduction state of the plurality of key switches based on the direct current voltage signal. According to the circuit, the influence of a high-frequency energy signal on a key detection signal is effectively eliminated, and misoperation and misjudgment of a machine are avoided.

Technique and mechanism for processing polyphonic audio signals. Processing includes filtering the audio signals to generate a set of narrow band signals, estimating an instantaneous magnitude and frequency associated with the narrow band signals and driving a bank of sinusoidal oscillators based on the instantaneous magnitude and frequency to create an output audio signal.

To provide a power supply capable of monitoring the impedance or capacitance of a load connected thereto.SOLUTION: A power supply comprises a current sensor that measures an oscillating current through a load connected to the power supply, a voltage sensor that measures an oscillating voltage across the load, and a source conductor that outputs the sinusoidal voltage generated by a sinewave oscillator. A micro-controller is coupled to the current sensor, the voltage sensor, and the source conductor. The micro-controller computes the impedance or capacitance of the load by using digital data derived from the three sensors.SELECTED DRAWING: Figure 4