Abstract: A circuit for automatically calculating a speed of a rotor includes: an edge generation module configured to receive Hall signals of three phases, and generate an edge response signal for the Hall signal of each phase; a counting module, which is connected to an output end of the edge generation module, configured to count the time difference between two adjacent jumps of the Hall signal of each phase on the basis of an output signal of the edge generation module to obtain a count value of each phase, output the current count value, and generate a trigger signal when the Hall signal of any phase jumps; and a division module, which is connected to an output terminal of the counting module, configured to divide an angle difference between the two adjacent jumps of the Hall signal by the current count value to obtain a rotation speed of an electric motor.

Abstract: The present disclosure provides a variable aperture, camera module, and electronic device, belonging to the field of electronic technology. The variable aperture includes: a first base member, a driving member, and at least one shading blade; The first base member includes an aperture hole, at least one shading blade is rotatably connected to the first base member, and the driving member is movably connected to at least one shading blade; The variable aperture is configured so that when the driving member moves relative to the first base member, the driving member drives at least one shading blade to rotate relative to the first base member, causing at least a portion of the shading blade to enter or exit the aperture hole, changing the effective light entrance area of the aperture hole.

Abstract: Systems and methods for an adapter for a high voltage (HV) battery system of an electrified vehicle (EV) involve an adapter housing configured to physically interface between (i) a battery module-side low voltage (LV) connector and (ii) a cell monitoring circuit (CMC) harness-side LV connector and a plurality of connector pins disposed within the adapter housing and being configured to, at their first ends, electrically connect to the module-side LV connector, at their opposing second ends, electrically connect to the harness-side LV connector, and act as a fuse such that at least one of the plurality of connector pins breaks an electrical connection therethrough in response to a current spike. In response to a blown fuse malfunction, the adapter could be replaced by a new adapter having a new adapter housing with a new plurality of connector pins disposed therein.

Abstract: A low-cost modular liquid nitrogen low-temperature multi-nuclear magnetic resonance probe includes a Dewar, a pluggable coil and a front-end gain amplifier. The Dewar includes a cylindrical sandwich chamber, the center of the cylindrical sandwich chamber constitutes a room-temperature chamber, a sandwich of the cylindrical sandwich chamber is divided into a vacuum chamber and a liquid nitrogen chamber by a liquid nitrogen vessel wall, the vacuum chamber is located between the room-temperature chamber and the liquid nitrogen chamber, the pluggable coil and the front-end gain amplifier are provided in the vacuum chamber, the pluggable coil comprises a coil portion and a pluggable base, the coil portion is in pluggable connection with the pluggable base, and the pluggable coil is connected with the front-end gain amplifier. The probe realizes the transmission of radio frequency pulses and the reception of magnetic resonance signals, and is applicable to whole-body imaging of a small animal.

Abstract: A low-cost modular liquid nitrogen low-temperature multi-nuclear magnetic resonance probe includes a Dewar, a pluggable coil and a front-end gain amplifier. The Dewar includes a cylindrical sandwich chamber, the center of the cylindrical sandwich chamber constitutes a room-temperature chamber, a sandwich of the cylindrical sandwich chamber is divided into a vacuum chamber and a liquid nitrogen chamber by a liquid nitrogen vessel wall, the vacuum chamber is located between the room-temperature chamber and the liquid nitrogen chamber, the pluggable coil and the front-end gain amplifier are provided in the vacuum chamber, the pluggable coil comprises a coil portion and a pluggable base, the coil portion is in pluggable connection with the pluggable base, and the pluggable coil is connected with the front-end gain amplifier. The probe realizes the transmission of radio frequency pulses and the reception of magnetic resonance signals, and is applicable to whole-body imaging of a small animal.

Abstract: A wire for transcranial magnetic stimulation, which is used to fabricate a transcranial magnetic stimulation coil (100), comprising: an insulating tube and metal wires (20) sleeved on the exterior of the insulating tube (10); the insulating tube (10) is a hollow structure, and the interior of the insulating tube (10) is used for liquid or gas circulation, and the metal wires (20) or multi-stranded wire are used for energizing to thereby generate a magnetic field. The present invention may not only achieve the effect of cooling the stimulation coil (100), but also avoids the danger of the wire coil and the a circulating coolant making contact and conducting electricity.