Abstract: A power tool includes a motor, an output shaft, a commutation detection device, and a controller. The commutation detection device is connected to the motor and used for obtaining commutation information of the motor. The controller is capable of outputting a control signal to control the motor to rotate. When the commutation information does not match a preset commutation condition, the control signal is adjusted based on the commutation information such that a rotational speed of the motor is maintained to be a target rotational speed.

Abstract: An impact tool includes an output shaft for outputting torque, where the tightening torque of the output shaft to a workpiece is greater than or equal to 700 foot-pounds; and an impact assembly that provides an impact force to the output shaft. A main shaft ball groove includes a first ball groove that extends spirally about a main shaft axis and is concave on an outer surface and a second ball groove that extends spirally about the main shaft axis and is concave on the outer surface. An impact ball groove includes a third ball groove that mates with the first ball groove to accommodate the rolling ball and a fourth ball groove that mates with the second ball groove to accommodate the rolling ball. The included angle ? between the first ball groove and the second ball groove is less than the included angle ? between the third ball groove and the fourth ball groove.

Abstract: A power tool includes a housing, an electric motor, a driver circuit, a speed detection device, and a control device. The driver circuit is electrically connected to the electric motor to drive the electric motor to operate. The speed detection device is configured to acquire a rotational speed of the electric motor. The control device is connected to the speed detection device and the driver circuit and outputs a control signal to the driver circuit to control rotation of the electric motor. The control device is configured to acquire the rotational speed of the electric motor when the electric motor is in a start-up stage, obtain a rotational speed variation of the electric motor within a preset time based on the rotational speed of the electric motor, and turn off the electric motor when the rotational speed variation is less than a rotational speed variation threshold.

Abstract: Example embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media of timing synchronization and anomaly detection mechanism. The method comprises: receiving, from a first device, measurement data of an object with data identification information, the first device served by the network device: determining timing information about the measurement data, the timing information indicating a transmission time of the measurement data from the first device: and transmitting the measurement data with the data identification information and the timing information to a wireless controller of the network device for anomaly detection analysis on the object. Using the timing information from the base station as a stable reference time helps to achieve timing synchronization among multiple IoT sensors or field devices. Further, by means of intelligent edge computing, anomaly events occurred or to be occurred at the field devices can be detected in a timely manner.

Abstract: An impact tool includes a controller for controlling a motor. The controller is configured to, when the direction of rotation of the motor is set to the reverse rotation direction, a drive shaft rotates at a first speed, and after an impact mechanism applies an impact force to an output shaft for a preset time, determine that a fastener is in a tightened state according to a load parameter of the output shaft and control the drive shaft to rotate at a second speed, where the second speed is greater than the first speed.

Abstract: An impact tool includes a first cover mounted at an end of a first housing facing away from an output mechanism, where a first bearing seat is formed on or connected to the inner side surface of the first cover; a display mechanism including a human-computer interaction assembly and a retaining assembly, where the retaining assembly is used for supporting the human-computer interaction assembly, the retaining assembly is disposed on the outer side of the first cover, the human-computer interaction assembly sets and displays an operation parameter, and the operation parameter includes the rotational speed of a motor and an impact time parameter; and a control mechanism driving the motor according to the set operation parameter so that an output shaft outputs the preset tightening torque.

Abstract: A surfboard leash attachment strap and a surfboard leash assembly are provided. The attachment strap includes an attachment strap body comprising a first section, a second section and a pull handle member, wherein, the first section is connected to a first end of the second section, an outer surface of the first section is provided with a first cooperating member, a second end of the second section is connected to the pull handle member, the attachment strap body is integrally molded as a one piece structure; a first fixing member fixed on the first section of the attachment strap body; and a second fixing member fixed on the second section of the attachment strap body, wherein the second fixing member is separably connected to the first fixing member. The strength of the surfboard leash attachment strap is enhanced, and the assembly process is simplified.

Abstract: An index homogenization conversion method, a method and device for homogenization conversion of same index detected by different equipment, electronic equipment, and a comparison sample determination method are provided.

Abstract: A power tool includes a housing, an electric motor, a driver circuit, a speed detection device, and a control device. The driver circuit is electrically connected to the electric motor to drive the electric motor to operate. The speed detection device is configured to acquire a rotational speed of the electric motor. The control device is connected to the speed detection device and the driver circuit and outputs a control signal to the driver circuit to control rotation of the electric motor. The control device is configured to acquire the rotational speed of the electric motor when the electric motor is in a start-up stage, obtain a rotational speed variation of the electric motor within a preset time based on the rotational speed of the electric motor, and turn off the electric motor when the rotational speed variation is less than a rotational speed variation threshold.

Abstract: Apparatuses, methods and storage media associated with a plurality of cooling devices thermally coupled to a plurality of heat-generating components of an electronic device, such as a server, a configured rack of servers, or a configured rack of server elements, are disclosed herein. Each cooling device may be associated with a unique cooling zone for the components. Logic may be coupled with the plurality of cooling devices, and the logic may be configured to cause a first cooling zone of a first cooling device to overlap a second cooling zone of a second cooling device. Other embodiments may be described and/or claimed.

Abstract: Apparatuses, methods and storage media associated with a plurality of cooling devices thermally coupled to a plurality of heat-generating components of an electronic device, such as a server, a configured rack of servers, or a configured rack of server elements, are disclosed herein. Each cooling device may be associated with a unique cooling zone for the components. Logic may be coupled with the plurality of cooling devices, and the logic may be configured to cause a first cooling zone of a first cooling device to overlap a second cooling zone of a second cooling device. Other embodiments may be described and/or claimed.