Abstract: The present invention provides a method and an apparatus for activating a tire pressure sensor, a storage medium and a front-end server. The method includes: obtaining a first identification number of the tire pressure sensor; determining a parameter of an activation signal according to the first identification number, the activation signal being used to activate the tire pressure sensor; and sending the activation signal to the tire pressure sensor according to the parameter.

Abstract: The present invention relates to the technical field of automobile maintenance and discloses a calibration device for a lane keeping assist (LKA) system. The calibration device includes a support apparatus, a laser and a pattern board. The support apparatus includes a horizontal graduated scale. The laser is configured to be mounted on the body of an automobile and to emit a laser beam to the horizontal graduated scale. The pattern board is mounted on the support apparatus and is configured to attach an alignment pattern. By means of the calibration device, two lasers are mounted on wheels on two sides of the automobile. Two laser beams that are emitted from equal distances with the wheels being reference points are irradiated to the horizontal graduated scale. Based on marks on the horizontal graduated scale, the support apparatus may be moved to an appropriate position to calibrate the centerline of the automobile.

Abstract: The present invention relates to an online diagnostic platform, and a permission management method and a permission management system thereof. The permission management method includes: when user information of a registered user is received, assigning a role in a role set to the registered user; determining a permission corresponding to the role; and generating a menu corresponding to the registered user, where the menu includes one or more function portals, the function portal being used for requesting execution of a diagnostic service function. The method uses security control policies such as the registered user, the role and the permission, and is flexible in management and relationship configuration. In addition, the permission management system is separated from a service system, has good expansibility, and can ensure stable running and data security of the system.

Abstract: The disclosure relates to the field of computer technologies, and in particular, to a timer-based task processing method and apparatus and an electronic device. The method includes: acquiring a countdown time of a timer object according to a first timer; and controlling a second timer to perform countdown according to the countdown time and processing a task corresponding to the timer object when the countdown is completed. According to this implementation, the timer object is controlled by using two timers, which improves operating efficiency of the timer object, reduces an error accumulation effect and improves timing accuracy.

Abstract: Embodiments of the present invention relate to the technical field of oscilloscopes and disclose a method and an apparatus for processing an oscilloscope signal and an oscilloscope. The method for processing the oscilloscope signal includes: obtaining a voltage signal; determining high and low level signals in the voltage signal according to a reference voltage; determining a valid digital signal from the high and low level signals; and displaying a waveform image of the digital signal. According to the embodiments of the present invention, the voltage signal may be converted into the digital signal without digital processing on the voltage signal via a hardware device such as an analog converter, thereby reducing costs of the oscilloscope and facilitating user operation and carrying.

Abstract: The present invention relates to the fields of automobile maintenance and device calibration technologies and discloses an automobile calibration device. The automobile calibration device includes: a stand apparatus; a supporting assembly, mounted at the stand apparatus and movable in a vertical direction with respect to the stand apparatus; and a drive assembly, configured to drive the supporting assembly to move in the vertical direction with respect to the stand apparatus. In the foregoing manner, the supporting assembly can automatically ascend or descend and manual adjustment of the supporting assembly is avoided.

Abstract: The present application provides a hub holding apparatus, including: a base on which a mounting hole and a receiving cavity are disposed, a center line of the mounting hole being perpendicular to a center line of the receiving cavity, and the mounting hole being in communication with the receiving cavity; a screw rotatable relative to the base; a first nut sleeved on the first threaded portion and received in the receiving cavity; and a second nut sleeved on the second threaded portion and received in the receiving cavity.

Abstract: The disclosure provides an automobile diagnosis method, apparatus and system. The method is applicable to a terminal device. The terminal device is communicatively connected to an automobile and includes virtual machine software and pieces of original instrument software. The virtual machine software runs virtual machines. The method includes: determining a piece of original instrument software for automobile diagnosis from the pieces of original instrument software; determining a virtual machine for running the piece of original instrument software from the virtual machines; acquiring fault data of the automobile; and controlling the virtual machine to run the piece of original instrument software, so that the piece of original instrument software analyzes the fault data to perform diagnosis for the automobile. The implementation is applicable to diagnosis of automobiles of many types, has an enhanced universality and improves stability of automobile diagnosis.

Abstract: A calibration device is provided. The calibration device includes a laser assembly, a calibration bracket and a magnetic element. The calibration bracket includes a loading platform which is configured to support the laser assembly. The magnetic element is mounted on one of the laser assembly and the loading platform, and is configured to attract the other of the laser assembly and the loading platform. By means of arranging the magnetic element on one of the loading platform and the laser assembly, the magnetic element can attract the other of the loading platform and the laser assembly, so that when the laser assembly needs to be mounted on the loading platform, the laser assembly only needs to approach the loading platform and the laser assembly will be attracted to the loading platform due to the magnetic force provided by the magnetic element.