Abstract: A device for detecting a slot wedge, an air gap and a broken rotor bar is provided, where a sequential circuit generates double concurrent pulses; the sequential circuit is connected to driving power modules; the driving power modules are connected to front-end interface circuits; the front-end interface circuits convert the double concurrent pulses into corresponding magnetic-field pulses; the magnetic-field pulses are transmitted to power supply terminals on adjacent phases of stator windings through impedance matching pins and coupled at a corresponding coil, air gap and squirrel cage rotor to generate single groups of cyclic rotating magnetic potentials; single rotating magnetic potentials are sequentially generated in adjacent slots on each of the phases of the stator windings; rotating electric potentials in magnetic circuits with two symmetrical phases are magnetically coupled to form distributed coupling magnetic field reflected full-cycle waves for reflecting a difference of a corresponding slot wedg

Abstract: An inspection system for inspecting optical assemblies of a LiDAR which includes a transmitting optical assembly at a transmitting end and a receiving optical assembly at a receiving end. The inspection system includes: a detection laser and a detection probe. The detection laser is configured to emit a detection laser beam that passes through the transmitting optical assembly and/or the receiving optical assembly, and exits the LiDAR or is incident to the detection probe. The detection probe is configured to receive the detection laser beam or an echo of the detection laser beam after being reflected off an object, and convert it into an electrical detection signal. The inspection system further includes a signal processing unit that communicates with the detection probe to receive the electrical detection signal, and is configured to determine an operation state of the optical assemblies based on the electrical detection signal.

Abstract: Provided are a flexible variable capacitor and method for preparation thereof. The flexible variable capacitor includes two highly conductive flexible electrode layers and an elastomer dielectric insulation layer disposed between the two highly conductive flexible electrode layers, wherein the highly conductive flexible electrode layers include first polymeric elastomer and carbon nanomaterial, and the elastomer dielectric insulation layer includes second polymeric elastomer and functional ceramic nanoparticles. The method for preparation of the flexible variable capacitor is as follows: first, preparing an elastomer composite film with different functions, and then pressing upper and lower electrode layers with the intermediate elastomer insulation layer together to obtain a stretchable strip-shaped plate capacitor.

Abstract: A device for providing audio data to a plurality of Bluetooth audio devices is provided. The device includes one or more Bluetooth transceivers for communicating with the plurality of Bluetooth audio devices, at least one network interface, one or more processors, and a memory for storing instructions executable by the one or more processors. The one or more processors may be configured to receive the audio data via the at least one network interface, decode the audio data for audio playing, and transmit the decoded audio data to the plurality of Bluetooth audio devices via the one or more Bluetooth transceivers.

Abstract: A device for providing audio data to a plurality of Bluetooth audio devices is provided. The device includes one or more Bluetooth transceivers for communicating with the plurality of Bluetooth audio devices, at least one network interface, one or more processors, and a memory for storing instructions executable by the one or more processors. The one or more processors may be configured to receive the audio data via the at least one network interface, decode the audio data for audio playing, and transmit the decoded audio data to the plurality of Bluetooth audio devices via the one or more Bluetooth transceivers.