Abstract: The present disclosure provides a method for preparing resorcinol through micro-channel reaction. In the method, resorcinol is prepared through micro-channel reaction using m-aminophenol as a raw material, a diazo salt is synthesized at 0° C. or more, hydrolysis of the diazo salt is performed at 90° C. or less, and then reaction conditions are reduced; the reaction time is decreased from traditional 10 hours to less than 2 minutes, and therefore the reaction time is significantly shortened; the purity of a product is 75% or more, which is significantly improved.

Abstract: The invention discloses a non-pneumatic tire, comprising a wheel hub; an annular belt located on the periphery of the wheel hub; spokes comprising a plurality of spokes circumferentially arranged between the annular belt and the wheel hub; each spoke being V-shaped, and the spoke comprising two inclined plates arranged at an angle and an arc-shaped apex corner area formed at the joint of the two inclined plates; a resistance part for limiting the deformation amount of the apex corner area to a deformation amount corresponding to the yield strength. According to the invention, plastic permanent deformation of spokes can be effectively avoided by adding resistance parts, and further the service life of non-pneumatic tires can be prolonged.

Abstract: The present application discloses a three-steering gear direct-drive coaxial rotor system and a control strategy, and belongs to the technical field of helicopter structures. The system includes an upper rotor power module, an upper rotor assembly, an upper tilting mechanism, a driving steering gear group assembly, a lower tilting mechanism, a lower rotor assembly, a lower rotor power module, an upper fixing mast, and a lower fixing mast. According to the present application, three steering gears directly drives an upper-layer swashplate and a lower-layer swashplate, to make cyclic pitch and add-subtract collective pitch on rotors. The synchronous tilting mechanism of the present application provides a flexible design solution for the characteristic of cyclic pitch phase angle offset of the rotors gear.

Abstract: A method for building a vehicle crash dummy skull model, includes: building an original skull model according to computed tomography scan data of a human skull; inserting a new first node according to a distance between adjacent first nodes on a hole boundary contour line, to obtain a target contour line; inserting a plurality of second nodes into holes according to the target contour line to obtain an intermediate boundary contour line; forming triangular nets according to the nodes on the target contour line and the intermediate boundary contour line; and with the intermediate boundary contour line as a new target contour line, returning to the operation of inserting a plurality of second nodes until the number of nodes of a final target contour line is less than or equal to a preset value. This embodiment is conducive to building of a skull model with a smooth cranial surface.

Abstract: A charging device includes a first DC convertor and controller. The first DC convertor is configured to convert a DC signal outputted by a power battery to a DC signal required for a storage battery. The first DC convertor includes a first half-bridge logical link control (LLC) circuit and a second half-bridge LLC circuit arranged in parallel. The controller is connected with the first half-bridge LLC circuit and the second half-bridge LLC circuit and configured to acquire a total output current of the first DC convertor, and control the first half-bridge LLC circuit and the second half-bridge LLC circuit to operate alternately when the total output current is less than a current threshold.

Abstract: A rotary imaging device for wheels and an automobile are disclosed. The rotary imaging device for wheels includes a housing matched with the wheels, and a processing component, a display component and a power supply that are installed in the housing, the processing component being electrically connected with the display component and the processing component and the display component being both electrically connected with the power supply. The processing component is configured to send received or read to-be-displayed content to the display component after preset processing, and the display component is configured to display the to-be-displayed content sent by the processing component. According to the rotary imaging device for wheels and the automobile, images or videos can be formed through rotation of the wheels.

Abstract: A charging device includes a PFC circuit, a first DC conversion module, a second DC conversion module, a switch module, and a control module. The PFC circuit includes at least three-phase bridge arm and is configured to perform PFC on an input AC and output a DC signal after the PFC. The first DC conversion module and the second DC conversion module are coupled to the PFC circuit to convert the AC signal. The switch module configured to turn on the three-phase bridge arm of the PFC circuit during three-phase charging or turn on one of the three-phase bridge arm of the PFC circuit during one-way charging. The control module is connected to the PFC circuit, the first and second DC conversion modules, and the switch module to control the charging device to perform single-phase charging or three-phase charging.

Abstract: A method for charging control of a hybrid electric vehicle, includes: receiving a charging instruction; acquiring a first voltage of a power battery and a second voltage of a storage battery in response to receiving the charging instruction; in response to determining that the first voltage is less than the first voltage threshold and the second voltage is less than the second voltage threshold, disconnecting the OBC from the power battery and charging the storage battery through the OBC and the DC for a charging duration; and in response to that the charging duration of the storage battery reaches a duration threshold, connecting the OBC to the power battery and charging the power battery through the OBC.

Abstract: A display apparatus includes a display panel and a backlight module. The backlight module includes: a back plate, a micro light emitting diode light board, and a diffusing plate bracket. The micro light emitting diode light board includes a plurality of through holes, the diffusing plate bracket is arranged in the through holes and fixed on the back plate via the through holes.

Abstract: The present invention discloses a method of filling simulated muscles for a limb of an automobile crash test dummy, the simulated muscles are molded with foaming in the inner cavity of the mold; the method comprises: obtaining a filling volume of the inner cavity of the mold by using a liquid casting method, preparing an adhesive liquid film layer, preparing a filler and conducting demolding detection on the limb. Wherein step 3 is to inject the mixed filler into the inner cavity of the mold so as to be foamed in the mold to form foamed sponge, and stand until the foamed sponge is foamed to the exhaust port and does not overflow any more.

Abstract: A method and apparatus for determining driving scene, and a vehicle are provided. The method includes: acquiring current driving data collected by a preset collection component; comparing the current driving data with a preset driving data threshold; and determining a current driving scene according to a comparison result between the current driving data and the threshold.

Abstract: A hub rotation imaging control system, includes a power management unit, which can output required direct current for other units; a parameter monitoring unit, which can monitor surrounding environment data of the hub and vehicle driving data; a main control management unit, which can receive the environment data and vehicle driving data monitored by the parameter monitoring unit, and generate video data and control instructions according to the environment data and vehicle driving data; and a data processing unit, which can receive the video data and control instructions generated by the main control management unit, and output drive signals to drive hub imaging.

Abstract: The present invention discloses a method of filling simulated muscles for a limb of an automobile crash test dummy, the simulated muscles are molded with foaming in the inner cavity of the mold; the method comprises: obtaining a filling volume of the inner cavity of the mold by using a liquid casting method, preparing an adhesive liquid film layer, preparing a filler and conducting demolding detection on the limb. Wherein step 3 is to inject the mixed filler into the inner cavity of the mold so as to be foamed in the mold to form foamed sponge, and stand until the foamed sponge is foamed to the exhaust port and does not overflow any more.

Abstract: The present invention relates to the field of passive safety testing of vehicles, in particular to a construction method for an impact response performance limit value of a crash dummy and an electronic device. The method includes: determining, according to response curves of the crash dummy under different impact test conditions, a standard response curve and alignment starting time and ending time of each response curve; aligning, according to differences between other response curves except the standard response curve and the standard response curve, other response curves except the standard response curve with the standard response curve; and determining, according to all the aligned response curves, an impact response performance limit value function of the crash dummy, where the differences include cumulative differences or cumulative variances. The method can truly, accurately and effectively construct a performance limit value of a dummy part under various impact tests.

Abstract: The present invention relates to the field of vehicle safety crash test dummies, and discloses an arm for a crash dummy, a control method, a device and a storage medium. The arm comprises: a first motor (1), a coupling (2), a capstan shaft (3), a first bevel gear (4), a second motor (5), a first capstan (6), a capstan bearing (7), an elbow joint base (8), a forearm (9), a first elbow joint bearing (11), drive lines (13), a second pulley (14), an elbow joint shaft (16), a first fixed sleeve (17), a second fixed sleeve (18), a second elbow joint bearing (20), an elbow joint connection block (22), a power source connection block (24), a second bevel gear (27), two sets of pulleys, a second capstan (28) and a power source bracket (29). The arm provided in this embodiment has an active function.

Abstract: The application discloses a coaxial helicopter, the cyclic pitch-changing mechanism simultaneously adjusts the pitches of the upper and the lower rotor systems, to make uniformity cyclic pitch-changing adjustment of the upper and lower rotors, and make independent collective pitch adjustment of the upper rotor system; the differential pitch-changing mechanism and the cyclic pitch-changing mechanism jointly act on the lower rotor system, to perform differential collective pitch adjustment of the upper and lower rotor systems. The synchronous rotating mechanism drives the swashplate members to synchronously rotate along with the drive shaft.

Abstract: The present application relates to a wheel with a sound absorber, the sound absorber being mounted in a wheel air chamber to reduce acoustic resonance, wherein the sound absorber is configured as a flat hexahedral box resonator and fastened to a wheel hub through a band, a first positioning mechanism is provided between the hub and the box resonator to fix the relative positions of the hub and the box resonator, and a second positioning mechanism is provided between the box resonator and the band to fix the relative positions of the box resonator and the band. According to the technical solution of the present disclosure, the resonator is positioned and fixed more reliably on the wheel, and the wheel is simple and economical in manufacturing, and convenient and controllable in installation and operation.

Abstract: A method for measuring the motion response of a dummy in a crash test comprises: acquiring images of a measurement mark by a camera during the crash test, wherein the measurement mark is fixed on a part to be measured of the dummy, and the dummy is set in association with a preset platform; determining first coordinate positions of the measurement mark in the images; determining corresponding second coordinate positions of the first coordinate positions in a static coordinate system according to a preset conversion relationship, wherein the X-axis of the static coordinate system is parallel to the motion direction of the preset platform, the Y-axis of the static coordinate system is perpendicular to the motion direction of the preset platform; and determining a motion response trajectory of the part to be measured according to an initial position of the part to be measured and the second coordinate positions.

Abstract: A device for printing two-dimensional code identifiers in an intelligent manufacturing system is composed of a clamping and positioning part and a two-dimensional code printing part. The invention can meet the demand for printing two-dimensional code identifiers in an intelligent manufacturing system, and has ideal effects and high efficiency. The operation is safe and reliable, with high degree of automation, and is especially suitable for mass production on the production line.

Abstract: A device for printing two-dimensional code identifiers in an intelligent manufacturing system is composed of a damping and positioning part and a two-dimensional code printing part. The invention can meet the demand for printing two-dimensional code identifiers in an intelligent manufacturing system, and has ideal effects and high efficiency. The operation is safe and reliable, with high degree of automation, and is especially suitable for mass production on the production line.