130results about How to "Reduce jitter amplitude" patented technology

The invention discloses a construction site ceramic tile transporting device, and relates to the technical field of ceramic tile transporting equipment. The construction site ceramic tile transportingdevice comprises a mounting groove, a buffer block is fixedly connected to the bottom of the inner wall of the mounting groove, a buffer groove is formed in the buffer block, a fixing rod is fixedlyconnected to the bottom of the inner wall of the buffer groove through a supporting plate, and connection blocks are slidably connected to the outer surfaces of the two ends of the fixing rod correspondingly. A buffer spring is fixedly connected to the position, between the two connection blocks, of the outer surface of the fixing rod, the tops of the connection blocks are movably connected with aconnection rod through pins, one end, away from the connection blocks, of the connection rod is movably connected with a top plate through a pin, and sliding blocks are slidably connected to the twosides, at the bottom of the inner wall of the buffer groove, of the fixing rod correspondingly. The construction site ceramic tile transporting device can place ceramic tiles well on a tooth plate, damping can be well conducted on the ceramic tiles, the magnitude of shaking of the ceramic tiles is reduced, the ceramic tiles can be clamped firmly, and the practicality of the equipment is improved.

The invention provides a method and device for controlling motor torque and an automobile, and relates to the field of motor control. The problem that a motor cannot determine the unique target torque when an electronic stabilization system is started or not started in the prior art can be solved. The method for controlling the motor torque in the embodiment of the invention includes the steps that current output torque of the motor and target need torque of the motor are acquired; and the current output torque of the motor can be adjusted according to the target need torque of the motor, and the motor is controlled to achieve outputting according to the adjusted torque. According to the method and device for controlling the motor torque and the automobile, the motor torque can be controlled under the condition that the motor stabilization system is started or not started, and the safety traffic of the automobile can be guaranteed; and meanwhile, the effect that the jitter amplitude of the automobile is small in the torque switching process of the motor can be ensured, the automobile smoothness is good and the comfort level is high.

The invention provides an anti-jitter moving object photographing and processing system comprising an unmanned aerial vehicle which is provided with a processor. The lower part of the unmanned aerial vehicle is provided with a machine frame of which the cross section is inverted U-shaped. The machine frame is provided with a supporting base of which the cross section is U-shaped. The side edge of the supporting base and the side edge of the machine frame are hinged. The hinge shaft of the supporting base and the machine frame is connected with an overturning motor. The overturning motor is fixedly installed on the machine frame. Two vertical rotating shafts are arranged on the supporting base in a cooperative way. The upper ends of the rotating shafts are provided with driven wheels. The lower ends of the rotating shafts are provided with camera frames at the lower part of the supporting base. The camera frames are fixedly provided with cameras. The supporting base is provided with a fixing base which is provided with a rotating motor. The output shaft of the rotating motor is installed on driving wheels. The driving wheels and the two driven wheels are connected in the cooperative way via the same driving belt. The camera frame is provided with horizontal fixing bases and a vertical fixing base. The cameras are fixedly installed on the horizontal fixing bases and the vertical fixing base. The horizontal fixing bases and the vertical fixing base are connected with the camera frames via springs.

The invention discloses a wind tunnel test tail support interference correction method and an application thereof. The wind tunnel test tail support interference correction method aims to settle a problem of incapability of performing tail support interference correction tests caused by factors secondary interference, relatively small test angle-of-attack and easy plane model vibration, wherein the factors occur because of a model belly supporting manner and relatively large dimension of a belly supporting system. According to the wind tunnel test tail support interference correction method, a stripe suspension supporting mechanism is used as an auxiliary support; and through simulating a testing state with a tail support system and a testing state without the tail support system, support interference correction amount of the tail support system to a tested sample is acquired, thereby acquiring a corrected testing result which comprises a model aerodynamic force, torque, etc. The wind tunnel test tail support interference correction method realizes the following advantages in correction: small secondary interference, large test angle-of-attack range, small tested model vibration amplitude, higher accuracy of obtained correction method, high use value and high economic benefit.

The invention relates to a PRI interval information-based radar signal sorting method and system, and belongs to the field of radar signal processing; the method comprises the steps: carrying out the multi-stage difference calculation of an arrival time sequence of a mixed overlapping radar pulse flow, and generating a difference sequence; determining a neighborhood radius and a density threshold value of a density clustering algorithm according to distribution characteristics of the difference value sequence; according to the neighborhood radius and the density threshold value, performing density clustering on the difference value sequence by using a density clustering algorithm to obtain a plurality of clustered clusters; calculating the extraction priority of each cluster, and generating PRI interval information to be extracted for the cluster with the highest priority; extracting a radar pulse signal corresponding to the PRI interval information to be extracted by adopting an improved pulse sequence search method, wherein the improved pulse sequence search method is a pulse sequence search method with tolerance control. According to the method, the PRI estimation precision and the information dimension can be improved, so that the sorting success rate of the radar pulse signals is improved.

The invention relates to the field of soil remediation, in particular to a soil screening device for soil remediation. The device comprises a crushing cylinder, a motor, a stirring block, an elastic grinding piece, a screening and filtering assembly and a transmission shaft. The transmission shaft is vertically arranged in the crushing cylinder and is driven by the motor to rotate; the elastic grinding assembly comprises a fixed outer ring, a fixed inner ring and a plurality of elastic strips, the fixed outer ring is fixed to the crushing cylinder, and the fixed inner ring is located below the fixed outer ring and smaller than the fixed outer ring; the upper end of each elastic strip is connected with the fixed outer ring, the lower end of each elastic strip is connected with the fixed inner ring, and the projection of each elastic strip in the horizontal plane is spiral; the stirring block is installed on the transmission shaft and located in an annular space defined by the elastic strips, the stirring block interacts with the elastic strips when rotating along with the transmission shaft to crush blocky soil, the elastic strips are made to extend under extrusion of the blocky soil, then the fixed inner ring is made to rotate, and partial or complete contraction is recovered when the pressure is reduced or disappears; and the screening and filtering assembly is used for receiving and filtering the crushed blocky soil.

The invention relates to an intelligent cargo handling car with a good buffer property. The intelligent cargo handling car with the good buffer property comprises a base plate, a supporting block, a baffle, a measuring mechanism, at least two buffer mechanisms and at least four car wheels; the measuring mechanism comprises a height measuring unit, a length measuring unit and a width measuring unit; the height measuring unit comprises a supporting rod, a second motor, a screw rod, a lifting block and a lifting plate; the length measuring unit comprises a pushing plate, a driving module, a sliding block, a sliding groove, a telescoping frame, a limiting block, a limiting groove and a connecting plate; the buffer mechanisms comprise elastic blocks, telescoping shafts, second pistons, pressingpipes, sleeve pipes, oil holes, sliding pipes and springs. According to the intelligent cargo handling car with the good buffer property, the volume of packed cargo can be effectively measured by themeasuring mechanism, so that the placing position of the cargo is determined according to the residual space in a warehouse and the space usage rate of the warehouse is increased; not only that, theintelligent cargo handling car is capable of reducing the shaking amplitude during the course of cargo transportation by the buffer mechanisms and the damage of the cargo can be avoided as far as possible.

The invention discloses an optical anti-shake camera of an unmanned aerial vehicle. The camera comprises a bearing plate, a camera main body mounted on a bottom surface of the bearing plate, and an anti-shake device mounted on an upper surface of the bearing plate, wherein the anti-shake device comprises a spherical buffer cavity, a movable hole is formed in the bottom of the buffer cavity, a support ball is arranged in the center of the buffer cavity, the bottom of the supporting ball is connected with a supporting rod, the supporting rod penetrates through the movable hole and is connected with the bearing plate, a plurality of cambered-surface-shaped shock absorption plates are arranged around the supporting ball, a damping plate is connected with a spherical surface of the supporting ball, a damping spring is connected between the damping plate and an inner wall of the buffer chamber, and the damping spring is arranged radially along the buffer chamber. The camera is advantaged inthat the structure design is reasonable, the camera shaking amplitude caused during the flight process of the unmanned aerial vehicle is reduced, influence of the shaking on the shooting effect of thecamera is reduced, and the shooting effect of the unmanned aerial vehicle is improved.

The invention discloses an impingement plate structure of a heat exchanger. The impingement plate structure comprises an inlet joint pipe, an impingement plate and ribbed plates; the lower end of the inlet joint pipe is welded on a shell of the heat exchanger; the impingement plate is fixed right below the inlet joint pipe through the two ribbed plates at the lower end of the inlet joint pipe and is located above a heat-exchanging pipe; the impingement plate has a V-shaped cross section, and two ends of the impingement extend to form convex plates; each ribbed plate has an L-shaped cross section, and comprises a long edge and a short edge; the upper end face of each ribbed plate is welded on the inner side wall of the shell, and the long edge of each ribbed plate is vertical to the shell; and the impingement plate is located above the short edge of each ribbed plate, and the bottom face of each convex plate of the impingement plate is welded on the upper surface of the short edge of each ribbed plate. According to the impingement plate structure of the heat exchanger in the scheme disclosed by the invention, the impingement plate structure has a simple structure and can be used for effectively preventing the impingement plate from falling off in a heat exchanger operation process, and thus, the normal operation of the heat exchanger is ensured.

The invention discloses a high-speed bullet train brake disc body and a casting method and heat treatment method thereof. The brake disc body is obtained through casting and heat treatment, an upper disc surface and a lower disc surface of the disc body are parallel to each other, and the upper disc surface and the lower disc surface of the disc body are connected through a plurality of U-shaped blocks which are uniformly distributed. According to the physical design of the disc body, a good balance degree of the disc body during high-speed rotation is guaranteed, and the amplitude during high-speed braking of the brake disc is greatly reduced; according to the design of the casting technique of the disc body, the quality of the disc body is greatly improved, and a high safety coefficient and a long service life of the disc body in long-time continuous braking are guaranteed; and according to the design of the heat treatment technology, the strength and the impact to be borne by the disc body during high-speed braking under the extremely-cold environment are reduced, and the thermal warping deformation generated in the continuous braking process is also reduced.

The invention provides an electrode component of electrocardiogram monitoring equipment. The electrode component comprises a hollow shell, an electrode plate, an electrocardiogram monitoring componentand at least one conductive vibrating needle and is characterized in that the shell is provided with an opening, the electrocardiogram monitoring component is stored in the shell, and the electrode plate is stored in the shell and exposed out of the shell through the opening; the part, exposed out of the opening, of the electrode plate is a medium contact area, and the conductive vibrating needle, and the conductive vibrating needle is electrically connected with the medium contact area and the electrocardiogram monitoring component. The invention further provides the electrocardiogram monitoring equipment comprising at least one electrode component.

A buffering and damping mechanism of a walking air wheelchair comprises a frame (1), a seat (2), a damping device (3), rear wheels (4) and front wheels (6), wherein the damping device (3) is composed of a damper (12) and a damping spring (11) and disposed between the wheelchair front wheels (6) and the frame (1). The mechanism is characterized in that the upper end and the lower end of the damping spring (11) are fixed on an upper supporting plate (10) and a lower supporting plate (13) of the damper (12) respectively; a hydraulic system with a buffering function is disposed inside the damper (12); and threads (9) and threads (14) are disposed on the upper part and the lower part of the damper (12). According to the invention, the structure is simple; manufacture cost is low; jolting and shaking ranges of the wheelchair can be effectively reduced during walking; and the mechanism is characterized by high safety, high comfort and convenient carrying, etc.

The invention relates to an assembly type steel structure-concrete combined bridge and a construction method thereof, and relates to the technical field of bridge construction. The assembly type steelstructure-concrete combined bridge comprises concrete piers and steel frame girders, wherein the side walls of the two sides of the concrete piers are correspondingly provided with placing grooves, the steel frame girders comprise steel girder supporting devices, steel girder bearing devices and steel girder plates, the bottoms of the placing grooves are connected with elastic blocks, and the elastic blocks are connected with the steel girder supporting devices; and male inserting plates and female inserting plates are arranged on the lower surfaces of the two steel girder plates on the sameconcrete pier correspondingly, the female inserting plates are matched with the male inserting plates in an inserted mode, the short edges of the female inserting plates and the short edges of the male inserting plates are connected with elastic parts, and the elastic parts extend to the part between the two steel girder plates and are connected with the opposite sides of the two steel girder plates. According to the assembly type steel structure-concrete combined bridge, due to arrangement of the male inserting plates, the female inserting plates, the elastic parts and the elastic blocks, theprobability of being damaged between the adjacent steel frame girders and between the steel frame girders and the concrete piers is reduced, the integral structure of the bridge is stable, and the probability of being damaged under the condition of an earthquake or large vibration is greatly reduced.

The invention discloses an anti-jitter circuit, an anti-jitter method, and a successive approximation analog-to-digital converter based on the circuit. The anti-jitter circuit comprises a parasitic inductor L1, a parasitic inductor L2, a parasitic resistor R1, a parasitic resistor R2, a switch S1, a capacitor C1, a capacitor C2, a switch S2, and a switch S3, wherein the input end of the parasitic inductor L1 is connected with a signal input end Vin, the output end of the parasitic inductor L1 is connected with a signal output end Vout through the parasitic resistor R1, the switch S1 and the capacitor C1 in sequence, the input end of the parasitic inductor L2 is connected with a signal input end VDD, the output end of the parasitic inductor L2 is connected with a fixed port a of the switch S2 through the parasitic resistor R2, a fixed port b of the switch S2 is connected with the signal output end Vout through the capacitor C1, a moving end c of the switch S2 is connected with a moving end c of the switch S3 through the capacitor C2, a fixed port b of the switch S3 is in butt joint with the ground, and a fixed port a of the switch S3 is connected with the signal input end VDD. Jitter caused by binding wires is reduced effectively, and the response speed of the integrated circuit is improved.

The invention discloses assembling equipment for an automobile tail door buffering block. The assembling equipment comprises a vibration disc, a feeding line, a fixture used for fixing a workpiece, aconveying line capable of conveying the fixture, a limiting device capable of limiting moving of the fixture on the conveying line, a mechanical arm assembly, a fracture-proof mechanism and a pressingmechanism, and the mechanical arm assembly comprises a mechanical arm capable of grabbing a plug and screwing the plug into the workpiece and an auxiliary device capable of increasing the degree of freedom of the mechanical arm. The assembling equipment is high in automation degree and production efficiency; specifically, the conveying line conveys the fixture to the limiting device, and the limiting device can limit and fix the fixture; and the vibration disc can convey the plug to the feeding line for grabbing of the clamping mechanism, and the mechanical arm can achieve multi-dimensional movement under control of the auxiliary device and finally screw the plug into a threaded hole of the workpiece.

The invention discloses a packaging method of a QFN fingerprint identification chip, belonging to the technical field of semiconductor chip packaging. The process comprises the following steps: mounting a loading film on the back of a lead frame; adhering the chip to the lead frame; curing silver paste; performing plasma cleaning; performing wire bonding; performing plastic packaging; removing theloading film; performing post curing; removing residual glue; baking; thinning a plastic cover and pasting a reinforcing film; cutting off a connecting rib to carry out a strip test; printing a marking; removing the reinforcing film; and cutting for molding. The invention provides a packaging method capable of improving the yield of QFN fingerprint identification chip packaging.

The invention relates to a high-precision Collimator stepping motor control method capable of quickly eliminating jitter, which comprises the following steps: receiving and analyzing, by a CPU, a motion instruction sent by an upper computer to obtain an initial parameter; dividing the displacement of the stepping motor into a plurality of stages, and obtaining the displacement of each stage according to the initial parameters; and converting the displacement of each stage into the step number of motion required by the stepping motor in each stage, obtaining the acceleration and the speed of each step through initial parameters, and calculating to obtain the time length required by the stepping motor to act each step through the size, the acceleration and the speed of each step of the stepping motor by the CPU. The CPU counter controls the stepping motor to act according to the time length, the accelerated speed and the speed required by each step; and the method has the advantages that S-shaped curve acceleration is adopted in the acceleration and deceleration process, the acceleration is gradually changed from the minimum value to the maximum value in the acceleration and deceleration process, it is guaranteed that the moment is not suddenly changed, and then the jitter amplitude is reduced.

The invention discloses a practical cell cryopreservation cooling box which comprises a main body container A, a box cover, a sealing plug B, a sealing vacuum layer and a free cabin. The main body container A is of a cylindrical structure, the box cover is arranged at the upper part of the main body container A in a sleeved manner, and the sealing plug B is arranged in the box cover in a sleeved manner. The practical cell cryopreservation cooling box has the beneficial effects that the practical cell cryopreservation cooling box is extremely convenient and practical; as a 4 DEG C refrigerator,a -20 DEG C refrigerator and a -80 DEG C refrigerator are needed in conventional cell cryopreservation, the container is suspended in a liquid nitrogen tank directly, so that the demand on the threerefrigerators is cancelled and the step of transferring the container to different temperature environments is cancelled; the practical cell cryopreservation cooling box is large in capacity: in a same appearance volume, compared with a programmed cooling box circulating in the market, the cooling box can accommodate 40 2ml cell cryopreservation pipes at one time, far higher than 18, 2ml cell cryopreservation pipes accommodated in programmed cooling boxes in the market; the practical cell cryopreservation cooling box is high in cell survival rate: in cell cryopreservation in a state that the cell vitality is 100%, the survival cell proportion after revive can reach over 95% and is equal to or higher than that of the programmed cooling box in the market.

The invention discloses an anti-vibration mobile cutting machine for a self-insulating block assembly line, which comprises two slide rails arranged in parallel and a cutting machine for cutting self-insulating block blanks slidably arranged on the slide rails. The cutting machine includes a frame, a traveling mechanism for driving the cutting machine, a cross-cutting mechanism for cutting off the upper and lower end faces of the self-insulating block body, and a mechanism for cutting off the side end faces of the self-insulating block body and turning the self-insulating block body The block body is divided into equal parts and blocks; the equipment adopts wet cutting, which not only greatly improves the production efficiency, but also produces smooth and beautiful blocks, the labor cost is reduced, and the labor intensity is low. It is operated by a single person, and no dust is generated during the production process, which is consistent with the company's goal of building a green and environmentally friendly factory.

The invention discloses a parking lot speed monitoring device which comprises a groove arranged in a lane. A lifting type deceleration mechanism is arranged in the groove and includes a hydraulic cylinder fixedly arranged on the bottom surface of the groove, a support plate is arranged on the side wall of the hydraulic cylinder, a second spring is arranged on the support plate and sleeves a pistonrod from outside, a mounting table is connected to the top of the second spring, a deceleration table is arranged above the mounting table, the mounting table is connected with the deceleration tablethrough a first spring, and multiple deceleration teeth are arranged on the deceleration table side by side; the mounting table includes a shell, multiple through holes are formed in the upper surface of the shell, and the through holes are communicated inner and outer spaces of the shell. By the arrangement, the deceleration table can be lifted according to current driving speed of a vehicle andsafety situation in a parking lot, and driving safety in the parking lot is improved.