7 results about "Vibration amplitude" patented technology

The invention discloses an unloading method based on high/low-frequency vibration load loading, and relates to the field of precise unloading of metal rods. High/low-frequency vibration loads include a high-frequency part with higher frequency and lower vibration amplitude, and a low-frequency part with lower frequency and higher vibration amplitude. One end of a rod with a V-shaped groove gap is fixed; and the high/low-frequency vibration loads are applied to the other one of the rod. The magnitudes and the speeds of the loads with two kinds of frequencies are reasonably controlled, so that the rod forms fatigue rupture at the position of the V-shaped groove gap under the effect of stress concentration. The characteristic that the high/low-frequency vibration loads can quickly enable metal materials to generate and expand cracks is adopted, and the unloading efficiency of metal rods is improved. Compared with the prior art, the technology is a green unloading technology, is high in efficiency, can largely reduce consumption of rods and cutters, and cannot generate defects such as sunk angles, rhombic distortion or horseshoe ports. Due to existence of the V-shaped groove, 45-degree chamfering angles will be formed at two ends of the unloaded rod.

The invention relates to the technical field of aerial vehicles and discloses a mounting base, a cradle head assembly and an unmanned aerial vehicle. The mounting base comprises a vibration reductiondevice and an anti-separation structure, wherein the vibration reduction device is connected with a cradle head; the vibration reduction device comprises a vibration reduction element connected with the unmanned aerial vehicle; the anti-separation structure is used for mounting the vibration reduction device and the cradle head on the unmanned aerial vehicle; and the anti-separation structure is configured to allow the movement distance between the vibration reduction device and the cradle head at least in the vibration direction of the vibration reduction device to be not less than maximum vibration amplitude of the vibration reduction element. Through adoption of the mode, the anti-separation structure of the mounting base does not interfere a vibration reduction piece so that the load mounted on a connecting piece works stably.

The present invention discloses an earphone vibrator detection device, system and method. The device of the present invention is suitable for detecting a headset vibrator, and being placed at the headband position of the headset during detection. The device comprises an acceleration sensor and a signal conversion module mutually connected; the acceleration sensor is configured to detect the acceleration information of the headband position when the headset outputs a specified audio, and convert the acceleration information into a voltage signal to be output to the signal conversion module; and the signal conversion module is configured to convert the received voltage signal into a digital signal to be output, so as to determine whether the vibration amplitude of the headset vibrator is qualified according to the output digital signal. The technical solution of the present invention solves the problem that the detection of a headset vibrator is currently conducted manually in a cumbersome and laborious manner.