48 results about "Wobble frequency" patented technology

The invention relates to a jewel adornment comprising an inlaying seat, a jewel and a base seat, wherein the jewel and the base seat are inlayed on the inlaying seat; shaft rods are respectively arranged at both sides of the inlaying seat; support parts with outer edges in the shape of an arc notch is arranged on the shaft rods, and the thicknesses of the support parts are progressively reduced from root parts to outer edge positions; supporting holes are respectively arranged at both sides of the base seat, the walls of the supporting holes are inwards protruded along a radial direction to form supporting parts with outer edges in the shape of the arc notch, and the thicknesses of the supporting parts are progressively reduced from the root parts to the outer edge positions; the shaft rods penetrate through the corresponding supporting holes; the support parts are movably hung on the corresponding supporting parts positioned on the base seat; and the outer edges of the supporting parts support the outer edges of the corresponding support parts. In the invention, the shaft rods provided with the support parts in the shape of the arc notch and the supporting holes provided with the supporting parts in the shape of the arc notch are convenient to process and assemble, small contact surfaces are positioned between the supporting parts and the support parts, the inlaying seat and the jewel can together wobble for a long time due to externally slight wobble, and wobbling frequency and wobbling amplitude can be controlled within an effective observing range of a human eye through a weight balancing block, and therefore, the color flashing effect can be better showed.

An apparatus and a method for determining the type of an optical disk are provided. Firstly, an RF signal of the optical disk in an optical disk drive is read out. Next, a bandpass signal is extracted from the RF signal by a bandpass filter whose central frequency is a wobble frequency. Then, whether the bandpass signal corresponds to a wobble signal is determined. If so, the optical disk is a recordable optical disk; otherwise, the optical disk is a read-only optical disk.

A sonic toothbrush, comprising a toothbrush head and a toothbrush body double as a handle, the toothbrush head includes a brush rod and bristles planted at one end of the brush rod, a swing shaft motor and a motor drive device are arranged in the toothbrush body, the swing shaft motor includes a bracket, and a The electromagnetic coil and the pendulum shaft located in the inner cavity of the bracket, two magnets are fixed at the end of the bracket, the pendulum shaft is installed on the bracket through the rotating shaft, the power output end of the pendulum shaft is connected with the toothbrush head, and the other end of the pendulum shaft is close to the two magnets, A frequency adjustment device for adjusting the swing frequency of the pendulum shaft is arranged on one side of the shaft motor. The vibration frequency of the toothbrush head of the toothbrush is increased to 350-550 Hz compared with 250 Hz of the conventional sonic toothbrush, the intensity of the "cavitation" effect is obviously improved, and the tooth cleaning efficiency is obviously improved. It has low running noise, reliable performance, long service life and simple production process. Can be designed as a toothbrush suitable for children.

The invention proposes an apparatus for recording or reproducing information, said apparatus having means for detecting or moving the position of a scanning device on a disc having a wobble track, said apparatus being capable of recording and unrecorded information on the disc. used in the area, and thus capable of being used in rewritable and write-once recording media having wobble tracks, the device additionally makes it possible to quickly determine the scan position without decoding the scan position information included in the wobble track. According to the present invention, a scanning device (2) is used to scan a wobble signal from a wobble track on a disk (1), and the wobble frequency (Fx) included in the wobble signal (WS) detected from the disk (1) is used to detect or move Scan the position of device (2). In this respect, the oscillation frequency (Fx) is related to the number of revolutions or rotational speed (Fd) of the disk (1) or to a oscillation frequency (Fx) known for the reference position (R0) on the disk (1), This makes it possible to detect or move the position of the scanning device without decoding the scanning position information included in the wobble signal (WS). In order to generate the wobble frequency (Fx) included in the wobble signal (WS), a circuit block (6) is provided, which includes a phase comparator (PD), a band-pass filter (LF), a voltage-controlled multivibrator (VCO) and digital phase shifter (DPS), and are used to generate the swing frequency signal (WS).

The invention relates to a special live ballast machine for salt ponds, which is composed of double rows of rake bodies, and is used for live ballast operation on crystallized salt layers by tractor traction. There are two cams installed on the main shaft of the live ballast machine, and each cam drives two driven bodies, and each driven body is fixedly connected to a rake body, and the two rake bodies are arranged in parallel and side by side. Bearing support can realize reciprocating swing, and the swing frequency can be manually adjusted by the operator, which reduces the working resistance of live ballast, makes the work of live ballast on crystallized salt layer more thorough and uniform, and improves the efficiency of live ballast. At the same time, the two ends of the rake body mechanism of the live ballast machine can be folded towards the middle, which greatly reduces the volume and is convenient for driving and transportation outside the salt pond.

An optical-information reproducing system is provided, in which the tracking capability of an optical pickup can be increased, and in which the number of occurrences in which the optical pickup fails to track a groove can be reduced, by increasing a gain margin and by ensuring the gain margin. In the optical-information reproducing system, an optical-information recording medium 150 is rotated at a fixed linear velocity of about 3.49 m / s, and the optical pickup 110 is caused to track the groove 152 to irradiate the groove with laser light, whereby information recorded on the optical-information recording medium can be reproduced. A higher-order resonance frequency of the optical pickup that is generated when the optical pickup 110 is caused to track the groove 152 can be made lower than a wobble frequency that is reproduced using the groove 152 without performing rotation control on the optical-information recording medium 150.

The invention discloses a programmable logic controller with the wobble frequency function, which comprises a wobble-frequency primary reducing module, a wobble-frequency secondary reducing module, a wobble-frequency primary increasing module, a wobble-frequency secondary increasing module and a control module. The wobble-frequency primary reducing module is used for reducing the wobble-frequency maximum amplitude frequency of a frequency converter to the wobble-frequency maximum hopping frequency. The wobble-frequency secondary reducing module is used for reducing the wobble-frequency maximum hopping frequency to the wobble-frequency minimum amplitude frequency. The wobble-frequency primary increasing module is used for increasing the wobble-frequency minimum amplitude frequency to the wobble-frequency minimum hopping frequency. The wobble-frequency secondary increasing module is used for increasing the wobble-frequency minimum hopping frequency to the wobble-frequency maximum amplitude frequency. The control module is used for executing the wobble-frequency primary reducing module, the wobble-frequency secondary reducing module, the wobble-frequency primary increasing module and the wobble-frequency secondary increasing module in looping mode. The programmable logic controller can be collocated with general frequency converters to achieve the wobble frequency function required by textile industry, and special frequency converters are not needed.