Abstract: The present disclosure discloses a bending angle detection method for tube bending. The detection method includes the following steps: binarizing a to-be-recognized image and extracting a region of interest (ROI) to obtain binary images of two linear segment regions, where the to-be-recognized image is an image of a bent tube; and calculating a bending angle according to the binary images of the two linear segment regions. The present disclosure provides an online method and system for measuring a bending angle based on images, which is cost-effective and has high efficiency and strong universality.

Abstract: An apparatus includes a power converter that includes a coupled inductor including a primary side terminal and a secondary side terminal, a primary switch coupled to the primary side terminal, and a rectifier switch coupled to the secondary side terminal. The apparatus also includes a primary side controller coupled to the primary switch, and a secondary side controller coupled to the rectifier switch. The primary side controller is configured to transmit a control signal to the secondary side controller via a wireless channel, the control signal indicating an operation mode of a plurality of operation modes of the power converter.

Abstract: Described embodiments include a protection circuit having a voltage attenuator circuit with an input coupled to a switch terminal. A filter circuit has a filter input coupled to the output of the attenuator. A first transistor has a first current terminal coupled to a power supply terminal, and a first control terminal coupled to the filter output. A second transistor, which is matched to the first transistor, has a third current terminal coupled to the first current terminal, a second control terminal coupled to the first control terminal, and a fourth current terminal coupled to a first voltage sense terminal. A buffer circuit has a buffer input coupled to the attenuator output. A S/H circuit has a sample input coupled to the buffer output, and a sample output providing a minimum ringing voltage of a signal from the switch terminal.

Abstract: Techniques are described herein for improving the burst operation of flyback power converters. The techniques provide a burst mode that delivers voltage pulses to a switching element with decreased power losses (e.g., greater switching efficiency). The efficiency of the power converter can be improved by capping the number of pulses to be delivered in a given burst packet and instituting a fixed delay to limit the power delivery. The pulses may be delivered during valleys of the signal at the switching terminal of the switching element to reduce switching losses. Additionally, a frequency clamp circuit is also provided to ensure the switching frequency is not above a predetermined threshold frequency. A device designed to implement the improved burst operation includes a burst control circuit, a pulse control circuit, a delay control circuit, and a latch.

Abstract: A battery cell, a battery pack, and a power consuming device are provided. The battery cell includes a housing, an electrode core, a first current collector plate, and a conductive pillar. A first tab is arranged at an end of the electrode core in a first direction. The electrode core is arranged in the housing. The first current collector plate and the conductive pillar are arranged at an end that is of the first tab and that is away from the electrode core. The first current collector plate is constructed into a flat plate shape. The first current collector plate is electrically connected to the conductive pillar and the first tab.

Abstract: A cutting tool includes a trunk assembly, an electric motor, a second housing for accommodating the electric motor, an output shaft for mounting a cutting piece, a transmission assembly connected between a motor shaft and the output shaft, and a third housing for accommodating at least part of the transmission assembly. In a process of the cutting piece cutting a workpiece, the third housing has a first contact surface and a second contact surface with the workpiece; when the first contact surface or the second contact surface is in contact with the workpiece, the cutting piece has a maximum cutting depth; and the angle between the first contact surface and the second contact surface is greater than or equal to 50° and less than or equal to 85°, and the maximum cutting depth is greater than or equal to 20 mm.

Abstract: The present disclosure discloses a bending angle detection method for tube bending. The detection method includes the following steps: binarizing a to-be-recognized image and extracting a region of interest (ROI) to obtain binary images of two linear segment regions, where the to-be-recognized image is an image of a bent tube; and calculating a bending angle according to the binary images of the two linear segment regions. The present disclosure provides an online method and system for measuring a bending angle based on images, which is cost-effective and has high efficiency and strong universality.

Abstract: A controller integrated circuit for controlling a voltage converter. The controller IC includes a transistor control driver terminal and a power terminal. A driver has a driver input, a driver output, and a driver supply voltage input. The driver output is coupled to the transistor control driver terminal, and the driver supply voltage input is coupled to the power terminal. Logic has a first logic output and a second logic output. A first transistor has a first control input, a first current terminal, and a second current terminal. The first logic output is coupled to the first control input, and the first current terminal is coupled to the power terminal. A second transistor has a second control input, a third current terminal, and a fourth current terminal. The second logic output is coupled to the second control input, and the third current terminal couples to the transistor control driver terminal.

Abstract: A controller integrated circuit for controlling a voltage converter. The controller IC includes a transistor control driver terminal and a power terminal. A driver has a driver input, a driver output, and a driver supply voltage input. The driver output is coupled to the transistor control driver terminal, and the driver supply voltage input is coupled to the power terminal. Logic has a first logic output and a second logic output. A first transistor has a first control input, a first current terminal, and a second current terminal. The first logic output is coupled to the first control input, and the first current terminal is coupled to the power terminal. A second transistor has a second control input, a third current terminal, and a fourth current terminal. The second logic output is coupled to the second control input, and the third current terminal couples to the transistor control driver terminal.

Abstract: A speaker box is provided and includes a housing defining a receiving space; and a speaker driver received in the receiving space. The speaker driver includes a basin frame, and a diaphragm and a magnetic circuit system. The speaker driver further includes a metal cover case fixed on the basin frame and the magnetic bowl. The metal cover case includes a bottom wall connected with the magnetic bowl and a side wall bent and extended from the bottom wall, and the leakage hole communicatively couples the first rear cavity with the second rear cavity. The speaker box further includes a metal ring covered on the magnetic bowl and the metal cover case, and the magnetic bowl, the metal cover case, and the metal ring are glued and fixed to one another. In this way, it is possible to effectively avoid blockage of the leakage holes.

Abstract: An electric circular saw includes a saw blade, a drive assembly, a housing, and a base plate. The drive assembly is used for driving the saw blade to rotate around a first axis. The electric circular saw further includes a dust-blowing structure. The dust-blowing structure includes a wind-blowing assembly disposed on the drive assembly, a dust-blowing portion disposed on the base plate and a wind guide portion disposed between the dust-blowing portion and the wind-blowing assembly. The dust-blowing portion includes a flow guide hole and a flow guide groove disposed on the base plate. The flow guide hole is a through hole extending through the base plate. The flow guide groove is a groove disposed on the lower side of the base plate. The flow guide hole communicates with the flow guide groove.

Abstract: Embodiments of the present application disclose a multi-sensor trigger control method, apparatus and device, and a storage medium, and relate to the technical field of sensors. The method includes: acquiring a target output frequency and an output phase set; determining, according to the output phase set and a preset value, an initial value and an overflow value of a counter corresponding to each phase in the output phase set; calculating a reference frequency according to the overflow value and the target output frequency; detecting, according to a received input signal and an output signal corresponding to the reference frequency, whether a phase alignment condition is met; and if the phase alignment condition is met, performing multi-sensor trigger through a trigger control method according to the overflow value and the initial value. By means of the embodiments of the present application, the trigger moment can be flexibly adjusted.

Abstract: A power tool includes a tool accessory, a motor, a control module, a power supply, and an operating switch. The operating switch includes a trigger mechanism, a current switch coupled to the trigger mechanism to be actuated by the trigger mechanism for connecting and disconnecting the electrical connection between the power supply module and the motor, and a signal switch coupled to the trigger mechanism to be actuated by the trigger mechanism at least configured to output a control signal to the control module to control the start of the motor.

Abstract: A speaker box is provided and includes a housing defining a receiving space; and a speaker driver received in the receiving space. The speaker driver includes a basin frame, and a diaphragm and a magnetic circuit system. The speaker driver further includes a metal cover case fixed on the basin frame and the magnetic bowl. The metal cover case includes a bottom wall connected with the magnetic bowl and a side wall bent and extended from the bottom wall, and the leakage hole communicatively couples the first rear cavity with the second rear cavity. The speaker box further includes a metal ring covered on the magnetic bowl and the metal cover case, and the magnetic bowl, the metal cover case, and the metal ring are glued and fixed to one another. In this way, it is possible to effectively avoid blockage of the leakage holes.

Abstract: A controller integrated circuit for controlling a voltage converter. The controller IC includes a transistor control driver terminal and a power terminal. A driver has a driver input, a driver output, and a driver supply voltage input. The driver output is coupled to the transistor control driver terminal, and the driver supply voltage input is coupled to the power terminal. Logic has a first logic output and a second logic output. A first transistor has a first control input, a first current terminal, and a second current terminal. The first logic output is coupled to the first control input, and the first current terminal is coupled to the power terminal. A second transistor has a second control input, a third current terminal, and a fourth current terminal. The second logic output is coupled to the second control input, and the third current terminal couples to the transistor control driver terminal.

Abstract: A monoclonal antibody inhibiting an SMIM15 and application thereof; the antibody is secreted by a hybridoma cell strain 1M5. A preparation method includes: preparing mouse immunogen and an antigen for detection; preparing the hybridoma cell strain 1M5 against an SMIM15; screening an SMIM15 positive monoclonal antibody: identifying a subtype of the monoclonal antibody; detecting specificity of the SMIM15 positive monoclonal antibody; producing and purifying the monoclonal antibody in a BALB/c mouse; detecting purity of the antibody by SDS-PAGE; and performing function identification and application on the SMIM15 monoclonal antibody with WB, IHC and ELISA. According to the present application, the antibody secreted by the hybridoma cell strain 1M5 is an immunoglobulin, which is non-toxic, and can be used for Western blot and immunohistochemistry and used as an active ingredient to be made into a reagent or drug for diagnosis and treatment of SMIM15-related diseases.

Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed for adaptive synchronous rectifier control. An example apparatus includes an adaptive off-time control circuit to determine a first voltage and a second voltage when a drain voltage of a switch satisfies a voltage threshold, the first voltage based on a first off-time of the switch, the second voltage based on the first off-time and a first scaling factor, determine a third voltage based on a second scaling factor and a second off-time of the switch, the second off-time after the first off-time, and determine a third off-time of the switch based on at least one of the second voltage or the third voltage. The example apparatus further includes a driver to turn off the switch for at least the third off-time after the second off-time.

Abstract: An electric circular saw includes a saw blade, a drive assembly, a housing, and a base plate. The drive assembly is used for driving the saw blade to rotate around a first axis. The electric circular saw further includes a dust-blowing structure. The dust-blowing structure includes a wind-blowing assembly disposed on the drive assembly, a dust-blowing portion disposed on the base plate and a wind guide portion disposed between the dust-blowing portion and the wind-blowing assembly. The dust-blowing portion includes a flow guide hole and a flow guide groove disposed on the base plate. The flow guide hole is a through hole extending through the base plate. The flow guide groove is a groove disposed on the lower side of the base plate. The flow guide hole communicates with the flow guide groove.

Abstract: An electric tool includes a functional piece, a motor, a case and a fan. The case includes a motor case portion. An airflow inlet and an airflow outlet are formed in the case. When the fan operates, an airflow at the airflow inlet is taken out and is directed to the airflow outlet after the airflow flows through the motor. The motor case portion includes an encircling portion which encircles the motor and an end portion arranged on one end of the encircling portion. A stopping piece stops the airflow from flowing back from one side of the motor to the other side.

Abstract: A polymer composition that contains a polyaryletherketone and a plurality of reinforcing fibers is provided. The reinforcing fibers have an aspect ratio of from about 1.5 to about 10, which is defined as the cross-sectional width of the fibers divided by the cross-sectional thickness of the fibers.