Abstract: A nail gun includes a housing; an electric motor disposed in the housing; a firing assembly configured to be capable of moving from an initial position to a firing position to drive a nail into a workpiece and moving from the firing position to the initial position within a nailing cycle; a parameter detection unit connected to at least the electric motor and configured to detect at least the number of revolutions of the electric motor; and a controller connected to at least the parameter detection unit. The controller is configured to, when the number of revolutions is greater than or equal to a first revolution number threshold and less than a second revolution number threshold, control the electric motor to operate at a constant rotational speed.

Abstract: A nail gun includes: a housing; an electric motor disposed in the housing; a firing assembly configured to be capable of moving from an initial position to a firing position to drive a nail into a workpiece and moving from the firing position to the initial position within a nailing cycle; a trigger switch disposed on the housing and configured to be operated upon an intention to drive the firing assembly; a push rod switch configured to be turned on when the push rod switch is pressed against the workpiece along the nailing direction; and a controller that is capable of at least acquiring a startup signal and controlling the electric motor to run. The controller is configured to, when the startup signal is detected within a current nailing cycle, at least control the electric motor to continue running until a nail is driven within a next nailing cycle.

Abstract: A nail gun includes a housing; an electric motor disposed in the housing; a battery pack configured to power the electric motor; a firing assembly configured to be capable of moving from an initial position to a firing position to drive a nail into a workpiece and moving from the firing position to the initial position within a nailing cycle; a parameter detection unit connected to at least the electric motor and configured to detect at least a working parameter of the electric motor; and a controller connected to at least the parameter detection unit. The controller is configured to, if the working parameter of the electric motor in a startup process is less than or equal to a parameter threshold, restrict a maximum duty cycle of a startup control signal to being less than or equal to a duty cycle threshold.

Abstract: A display panel includes a substrate, a first electrode layer, an anti-peeping layer, a plurality of light-emitting units, a plurality of anti-peeping units and a colored photoresist layer. The first electrode layer is provided at a surface of the substrate; the anti-peeping layer is provided at a surface of the first electrode layer; the plurality of light-emitting units are provided at a surface of the anti-peeping layer at intervals and connected, and an accommodating space is defined between two adjacent light-emitting units; the anti-peeping units are arranged in the accommodating space accordingly; the color photoresist layer is provided at a side of the light-emitting unit facing away from the anti-peeping layer, and its black matrix is arranged corresponding to the anti-peeping unit.

Abstract: A fastener driver includes a first cylinder including first cylinder holes through which the external gas is replenished into the first cylinder; and a second cylinder including second cylinder holes through which the gas in the second cylinder is released to the outside. The first cylinder communicates with the second cylinder. A first piston is disposed in the first cylinder. When a striking member is at a stop position, the air pressure on one side of the first piston is different from the air pressure on the other side of the first piston.

Abstract: A fastener driver includes: a striking assembly including a striking member configured to strike a fastener; and an electric motor, where the electric motor is configured to drive a power mechanism to move and generate power. The striking member includes a striking end for striking the fastener, and the striking end is provided with a recess.

Abstract: A nail gun includes a housing; an electric motor disposed in the housing; a battery pack configured to power the electric motor; a firing assembly configured to be capable of moving from an initial position to a firing position to drive a nail into a workpiece and moving from the firing position to the initial position within a nailing cycle; a parameter detection unit connected to at least the electric motor and configured to detect at least a working parameter of the electric motor; and a controller connected to at least the parameter detection unit. The controller is configured to, if the working parameter of the electric motor in a startup process is less than or equal to a parameter threshold, restrict a maximum duty cycle of a startup control signal to being less than or equal to a duty cycle threshold.

Abstract: A power tool includes: an electric motor including a rotor and a plurality of stator windings; a power interface having at least a positive electrode interface and a negative electrode interface and configured to be connected to a power supply; and a control circuit connected between the power interface and the electric motor and configured to control the electric motor to operate. The control circuit includes: a first power line connected to the positive electrode interface; a second power line connected to the negative electrode interface; and a plurality of noise suppression devices configured to suppress noise on a side of the electric motor. The plurality of noise suppression devices includes a first noise suppression device, a first terminal of the first noise suppression device is connected to the plurality of stator windings, and a second terminal of the first noise suppression device is connected to the first power line.

Abstract: A nail gun includes a housing; an electric motor disposed in the housing; a battery pack configured to power the electric motor; a firing assembly configured to be capable of moving from an initial position to a firing position to drive a nail into a workpiece and moving from the firing position to the initial position within a nailing cycle; a parameter detection unit connected to at least the electric motor and configured to detect at least a working parameter of the electric motor; and a controller connected to at least the parameter detection unit. The controller is configured to, if the working parameter of the electric motor in a startup process is less than or equal to a parameter threshold, restrict a maximum duty cycle of a startup control signal to being less than or equal to a duty cycle threshold.

Abstract: A nail gun includes a housing; an electric motor disposed in the housing; a firing assembly configured to be capable of moving from an initial position to a firing position to drive a nail into a workpiece and moving from the firing position to the initial position within a nailing cycle; a parameter detection unit connected to at least the electric motor and configured to detect at least the number of revolutions of the electric motor; and a controller connected to at least the parameter detection unit. The controller is configured to, when the number of revolutions is greater than or equal to a first revolution number threshold and less than a second revolution number threshold, control the electric motor to operate at a constant rotational speed.

Abstract: A power tool includes a motor, a signal switch, a signal detection circuit, a power-on control switch, a first controller, and a second controller. The signal switch is used to switch a power on/off state of the power tool. The signal detection circuit is configured to output a detection signal according to a connection state of the signal switch. The power-on control switch is connected to the second controller. The first controller is configured to control an on/off state of the power-on control switch. When the signal detection circuit outputs a power-off signal, the first controller controls the power-on control switch to be turned off so that the second controller is de-energized and the motor stops rotating. When the power-on control switch still remains on, the second controller controls the switch elements in the driver circuit to be turned off so that the motor stops rotating.

Abstract: A power tool includes a motor, a signal switch, a signal detection circuit, a power-on control switch, a first controller, and a second controller. The signal switch is used to switch a power on/off state of the power tool. The signal detection circuit is configured to output a detection signal according to a connection state of the signal switch. The power-on control switch is connected to the second controller. The first controller is configured to control an on/off state of the power-on control switch. When the signal detection circuit outputs a power-off signal, the first controller controls the power-on control switch to be turned off so that the second controller is de-energized and the motor stops rotating. When the power-on control switch still remains on, the second controller controls the switch elements in the driver circuit to be turned off so that the motor stops rotating.

Abstract: A method for extracting structured data from an image is provided. The method includes: obtaining a first information set and a second information set in the image by using an image text extraction model, where the image includes at least one piece of structured data; obtaining at least one text subimage in the image based on at least one piece of first information included in the first information set; identifying text information in the at least one text subimage; and obtaining at least one piece of structured data in the image based on the text information in the at least one text subimage and at least one piece of second information included in the second information set. By using the image text extraction model and a text identification model, structured data extraction efficiency and accuracy are improved.

Abstract: A pyrolysis-combustion dual-bed system comprises a fluidized bed, a cyclone separator, a coal ash distributor, an ash-coal mixer, a lower pyrolysis bed, a return feeder and a cleaner, wherein the cyclone separator is connected with an upper lateral side of the fluidized bed, the outlet end of the cyclone separator is connected with the inlet end of the coal ash distributor; the two outlets of the lower pyrolysis bed are respectively connected with the inlet of an external bed and the inlet of the cleaner; the outlet of the external bed is connected with the inlet of the return feeder; the return feeder close to the lower lateral side of the fluidized bed is connected with the inlet on the lower lateral side of the fluidized bed; and the outlet of the cleaner is connected with the inlet of the lower lateral side of the fluidized bed.

Abstract: A dual-bed system for preventing a boiler heating surface from being contaminated comprises a fluidized bed, a cyclone separator, a coal ash distributor, an ash-coal mixer, a lower pyrolysis bed, a return feeder and a cleaner, wherein the cyclone separator is connected with the upper lateral side of the fluidized bed; the inlet end of the coal ash distributor; the two outlets of the coal ash distributor are respectively connected with the inlet of the return feeder and the inlet of the ash-coal mixer; the outlet of the ash-coal mixer is connected with the inlet of the lower pyrolysis bed; the return feeder close to the lower lateral side of the fluidized bed is connected with the inlet on the lower lateral side of the fluidized bed; and the outlet of the cleaner is connected with the inlet on the lower lateral side of the fluidized bed.

Abstract: An external bed type double-fluidized bed system for preventing boiler contamination includes a fluidized bed combustion furnace, a cyclone separator, a coal ash distributor and a fluidized bed pyrolysis furnace. The fluidized bed combustion furnace is connected with the coal ash distributor, the coal ash distributor is connected with the coal ash inlet on a side wall of the fluidized bed combustion furnace through a return feeder with which the coal ash outlet of the fluidized bed pyrolysis furnace is also connected through an external bed, and the return feeder is connected with the fluidized bed combustion furnace. A fuel coal is pyrolyzed in the fluidized bed pyrolysis furnace at a temperature to volatize alkali chlorides into a pyrolysis gas, thereby reducing the content of the alkali chlorides contained in the coal in the fluidized bed combustion furnace and relieving the contamination to a convective heat-absorbing surface.

Abstract: A pyrolysis-combustion dual-bed system Comprises a fluidized bed, a cyclone separator, a coal ash distributor, an ash-coal mixer, a lower pyrolysis bed, a return feeder and a cleaner, wherein the cyclone separator is connected with an upper lateral side of the fluidized bed, the outlet end of the cyclone separator is connected with the inlet end of the coal ash distributor; the two outlets of the lower pyrolysis bed are respectively connected with the inlet of an external bed and the inlet of the cleaner; the outlet of the external bed is connected with the inlet of the return feeder; the return feeder close to the lower lateral side of the fluidized bed is connected with the inlet on the lower lateral side of the fluidized bed; and the outlet of the cleaner is connected with the inlet of the lower lateral side of the fluidized bed.

Abstract: An external bed type double-fluidized bed system for preventing boiler contamination includes a fluidized bed combustion furnace, a cyclone separator, a coal ash distributor and a fluidized bed pyrolysis furnace. The fluidized bed combustion furnace is connected with the coal ash distributor, the coal ash distributor is connected with the coal ash inlet on a side wall of the fluidized bed combustion furnace through a return feeder with which the coal ash outlet of the fluidized bed pyrolysis furnace is also connected through an external bed, and the return feeder is connected with the fluidized bed combustion furnace. A fuel coal is pyrolyzed in the fluidized bed pyrolysis furnace at a temperature to volatize alkali chlorides into a pyrolysis gas, thereby reducing the content of the alkali chlorides contained in the coal in the fluidized bed combustion furnace and relieving the contamination to a convective heat-absorbing surface.

Abstract: A dual-bed system for preventing a boiler heating surface from being contaminated comprises a fluidized bed, a cyclone separator, a coal ash distributor, an ash-coal mixer, a lower pyrolysis bed, a return feeder and a cleaner, wherein the cyclone separator is connected with the upper lateral side of the fluidized bed; the inlet end of the coal ash distributor; the two outlets of the coal ash distributor are respectively connected with the inlet of the return feeder and the inlet of the ash-coal mixer; the outlet of the ash-coal mixer is connected with the inlet of the lower pyrolysis bed; the return feeder close to the lower lateral side of the fluidized bed is connected with the inlet on the lower lateral side of the fluidized bed; and the outlet of the cleaner is connected with the inlet on the lower lateral side of the fluidized bed.