7results about How to "Secure location" patented technology

The utility model relates to integrated hot melting tapping equipment which comprises a transverse moving assembly, a pre-trepanning assembly, a hot melting drilling assembly and a tapping assembly, the pre-trepanning assembly, the hot melting drilling assembly and the tapping assembly are all arranged on the transverse moving assembly, the pre-trepanning assembly is arranged on one side of the hot melting drilling assembly, and the tapping assembly is arranged on the other side of the hot melting drilling assembly. The pre-trepanning assembly comprises a connecting plate, a connecting box, a motor, a driving wheel, a driven wheel, a belt, a lifting driver, a rotating shaft assembly and a drill bit, the connecting plate is arranged on the transverse moving assembly, the connecting box is fixed to the connecting plate, the motor is arranged in the connecting box, the output end of the motor is connected with the driving wheel, and the driven wheel is connected with the belt. The pre-punching assembly is arranged on the transverse moving assembly, the precise size and position of a hole can be ensured through pre-punching, the tapping assembly can enter the hole more easily and form firm connection, the cutting resistance of hot melting tapping in a material can be reduced, and operation is easier and more efficient.

The cabinet door latch system comprises a main lock body, a transmission connecting rod assembly and a plurality of lock point mechanisms, each lock point mechanism comprises a lock point base and a plate-shaped rack type lock pull rod, a first installation position and a second installation position are arranged in a guide groove in each lock point base, each lock pull rod is vertically installed on the corresponding first installation position and only slides in the axial direction, and a flat plate section is installed on the corresponding second installation position. When the flat plate section is inserted into or withdrawn from the opening of the guide groove, the linkage part is hooked or separated to realize transmission connection and disconnection, and the top end of the linkage part is lower than the top end of the lock pull rod, so that the side edge of the top end of the lock pull rod is exposed at the second mounting position, and the base is internally provided with a pivotable restraining component at the lateral concave part of the position. The restraining part is moved into the second mounting position to shield the opening, meanwhile, the flat plate section is limited and matched with the side edge of the top end of the lock pull rod, during disassembly, the component can be switched to the open state, the restraining part is moved out, and the flat plate section can be pulled out. And the lock point is convenient to disassemble and operate.

This application discloses an LED display screen, relating to the field of LED display screen technology. The LED display screen includes a cabinet, LED display units, and an arc adjustment mechanism. The cabinet includes a first frame, a second frame, a first hinge structure, and a second hinge structure. The first hinge structure is rotatably connected between the first and second frames at their first ends, and the second hinge structure is rotatably connected between the second ends of the first and second frames. The LED display units are connected to the first and second hinge structures. The arc adjustment mechanism is located between the first and second frames and is used to adjust and fix the arc of the LED display units. This LED display screen solves the problem that current LED displays cannot achieve flexible angle adjustment while ensuring connection strength and angle consistency.

This invention relates to a sensorless control method for permanent magnet synchronous motors (PMSMs) with low observation error under multiple operating conditions, belonging to the field of motor control technology. The invention establishes a mathematical model of the PMSM in a stationary coordinate system and a classical back-EMF observer; based on the observed back-EMF values ​​after coordinate transformation, an adaptive gain characterizing the rotor motion direction is designed; a cosine value of the rotor position estimation error is constructed, and an adaptive gain feedforward orthogonal high-order phase-locked loop (PLL) is used, along with an ideal low-pass filter, to obtain estimates of the rotor speed and position. This invention can more effectively reduce the influence of complex operating conditions on the motor position estimation error, providing more reliable speed estimation and rotor position signals for the field-oriented control of the motor. The sensorless control strategy for PMSMs with low observation error under multiple operating conditions proposed in this invention can achieve speed control when the motor is in reverse, exhibiting good dynamic and steady-state performance.

This application relates to an apparatus and method for winding and forming the insulation layer of an LNG vehicle-mounted cylinder, belonging to the technical field of gas tanker manufacturing. It includes an inner liner rotating support frame, an aluminum foil feeding mechanism, a load-bearing component, a support frame moving component, and an aluminum foil support frame. The inner liner rotating support frame supports and drives the inner liner to rotate to wind circumferential aluminum foil. The aluminum foil feeding mechanism automatically picks up aluminum foil from the aluminum foil support frame and attaches it to the end face of the inner liner; it includes a feeding moving component, a feeding component, and a rotating component. The load-bearing component stably supports the inner liner. The support frame moving component moves the inner liner rotating support frame to avoid interference. This application automates the aluminum foil attachment to the end face of the inner liner through the aluminum foil feeding mechanism, optimizes the operating space using the support frame moving component, solves the problems of low efficiency and poor quality of manual attachment, and improves production efficiency and attachment consistency.

This invention discloses an engineering exploration and sampling device. The invention relates to the field of engineering exploration and sampling technology, and includes a platform and a control module. The platform is equipped with a centrifugal mechanism, which includes a turntable rotatably connected to the platform. A rotating arm is mounted on the turntable, and a sample tube and a drill tube are mounted on the rotating arm. One end of the sample tube is connected to one end of the drill tube, and the sample tube and drill tube rotate synchronously. A pressure limiting mechanism is installed on the platform, and a limiting mechanism is installed inside the sample tube. This invention enables the smooth transfer of complex soil and rock samples, including loose sand and gravel, soil layers, broken rock cores, and mud, from the drill tube to the sample tube by uniformly applying centrifugal force to the entire sample without opening the tube, flipping, or artificial disturbance. It features the ability to achieve overall, controllable, and synchronous transfer of complex samples with minimal or no intervention.

The invention discloses a seabed space-time base station and a data processing method, the base station comprises a base, a pressure-resistant cabin, a floating ball and a pedestal, the middle part of the base is provided with a conduction integrated transducer, and four hydrophones are uniformly distributed around the base. The data processing method comprises the following steps: the transducer sends a communication signal to a target carrier and calculates propagation time; calculating clock offset by using signal receiving and transmitting time, calibrating a clock for a reference station, and timing for a target carrier; after time service, calculating the position of the base station by using an acoustic observation equation between the sea surface carrier and the base station and a pressure-water depth observation equation of the base station, and judging the displacement of the base station by using a Bayesian framework; after position calibration, a processing strategy is selected according to the position of the target carrier, and when more than two base station signals are received, the target carrier automatically constructs an observation equation to calculate the position; and when only one base station signal is received, the base station determines a target position according to an ultra-short baseline mode and sends a result. According to the invention, the construction cost of the seabed space-time reference network is reduced, near-far fusion positioning is realized, and the service range and performance are improved.