91results about How to "Low motion noise" patented technology

The invention relates to an electrically-driven small bionic four-leg robot. The electrically-driven small bionic four-leg robot is a twelve-degree-of-freedom pure electrically-driven small mammalian bionic four-leg robot. The robot is of a four-leg robot mechanism structure designed based on the bionic structure and the motion feature of a four-leg mammal. The electrically-driven small bionic four-leg robot comprises a mechanical system and a power and motion control system. The simplified mechanical structure and a highly-integrated small real-time motion control system are adopted in the electrically-driven small bionic four-leg robot. Each leg of the robot is provided with three low damping moment control joints directly driven by a permanent-magnet synchronous motor (PMSM), each leg is provided with a spring energy storage mechanism, and therefore the four-leg robot has the higher energy using efficiency. Multiple motion gaits such as creeping, walking, trotting and running can be achieved through the electrically-driven small bionic four-leg robot, and the electrically-driven small bionic four-leg robot has the advantages of being simple in mechanical structure, ultra-low in noise, and low in cost, achieving dynamic self-balancing and the like.

A low-noise humanoid robotic head system, which can effectively mimic motion of human head, is presented in this invention. The system is a four-degrees-of-freedom (DOF) head that has a 3DOF neck and 1DOF lip. Because the involved mechanical components are limited to cables, cable housings, shaft, fixed pulleys, ball bearing, compression springs, rods, and static base plate, the measured a-weighted noise level of the robotic head system is no more than 30 dB.

The invention relates to a full-automatic visual spot-welding robot which comprises a bottom plate mechanism, as well as a visual identification system, an automatic spot-welding system, a motion platform system and an industrial personal computer (IPC) which are arranged on the bottom plate mechanism, wherein the visual identification system comprises an industrial camera, a light source and a light source controller; the industrial camera and the light source are connected with the bottom plate mechanism by virtue of a lifting table, and the light source is positioned under the industrial camera; the automatic spot-welding system comprises a micro-spot-welding mechanism and a micro-spot-welding controller; the micro-spot-welding mechanism is connected with the bottom plate mechanism by virtue of a lifting mechanism; the motion platform system comprises an X-axis module and a Y-axis module; the Y-axis module is slidably connected to the X-axis module; and the motion platform system is positioned below the visual identification system and the micro-spot-welding mechanism. The robot capable of realizing a full-automatic spot-welding function has the functions of automatically locating the spot-welding position of a workpiece in a visual way, guaranteeing the precise translational motion of the workpiece, welding in an automatic micro-spot-welding way, and the like.

The invention relates to a linear motor module for robot splicing. The linear motor module comprises a rotor assembly, a stator assembly, a brake and a controller, wherein the brake is connected to the rotor assembly, the rotor assembly sleeves the stator assembly, connection holes are formed in both of the rotor assembly and the stator assembly, the rotor assembly comprises a shell, a coil, a connector, a grating reading head, a first limit switch and a second limit switch, the stator assembly comprises a stator body, a permanent magnet and a grating, the brake comprises a wedge-shaped block,a braking spring, a piston, a braking block and an extrusion spring, and the grating reading head, the first limit switch, the second limit switch and the piston all are electrically connected with the controller.

The invention discloses a PPG-based non-contact non-invasive heart rate and respiration measuring method. The method comprises the following steps: step 1, image acquisition; step 2, region of interest ROI acquisition; step 3, ICA and consistency analysis; step 4, change signal acquisition; step 5, Gaussian filtering processing and multi-scale analysis; and step 6, fast Fourier transform. According to the method, a novel time domain heart rate and respiratory value signal extraction scheme based on a histogram statistics thought is used, noise information contained in obtained time domain signals is reduced, and the accuracy of heart rate detection is enhanced; a Gaussian filtering denoising method is innovatively used, so that the robustness of the system is greatly improved; Overlays isconstructed for an algorithm with a large calculation amount, and hardware acceleration is carried out at a PL end; and the PS end utilizes a time overlapping method to improve algorithm parallelism,realizes portability of hardware of the low-performance FPGA, and meets the requirements of real-time heart rate and respiratory value calculation on high frame number of a video.

A selective counterweight for sports apparatus is composed of a plastic casing with filling hole and its plug, intalling hole, locating hole, reinforcing ribs, and locating boss and recess, and the filler which is the mixture of water, cement and sand or steel sand and can be filled in said plastic casing via said filling hole.

The invention discloses a gearing device of a hanging digital-radiography system, which comprises a cable-wire turnplate shaft, a motor, a worm gear reduction box and a primary synchronous belt, and a transition shaft and a secondary synchronous belt as well, wherein, the shaft of the motor is connected with the worm gear reduction box, the primary synchronous belt surrounds one end of the transition shaft and the shaft of the worm gear reduction box, and the secondary synchronous belt surrounds the cable-wire turnplate shaft and the other end of the transition shaft. The gearing device of the hanging digital-radiography system utilizes the synchronous belts to carry out driving, and the transmission process is smooth and precise, thereby reducing the motional noise of the gearing device to the minimum; meanwhile, the characteristics of the self-lockable worm gear reduction box are utilized to improve the safety of the gearing device, and since no motor with electromagnetic brake is needed, the cost is saved.

The invention discloses a bag bottom folding preventing device for a double-layer bag bagging machine and belongs to the field of package bag processing equipment. The bag bottom folding preventing device for the double-layer bag bagging machine comprises a bag grabbing rack mounted on the driving guide sliding mechanism of the bagging machine, a left retracting mechanism and a right retracting mechanism mounted on the left and the right of the bag grabbing rack respectively, a left mechanical claw and a right mechanical claw, wherein the left mechanical claw is connected with the left retracting mechanism through a left bag grabbing arm, the right mechanical claw is connected with the right retracting mechanism through a right bag grabbing arm, the bag grabbing rack is used for driving the left mechanical claw and the right mechanical claw to move back and forth, the left retracting mechanism and the right retracting mechanism are used for driving the left mechanical claw and the right mechanical claw to move towards the inside or the outside of the bag grabbing rack, and the left mechanical claw and the right mechanical claw are used for clamping internal bags. The bag bottom folding preventing device for the double-layer bag bagging machine solves the problem of folding of the inner bags of double-layer bags and can fully fill the bottoms of the bags with materials during application, thereby making full use of space of the double-layer bags. Meanwhile, the bag bottom folding preventing device for the double-layer bag bagging machine is simple in structure and good in use effects.

The invention relates to an apparatus and a method for vector component data acquisition. Aspects of the disclosure may reduce motion noise by mounting vector component sensors on a bottom-weighted instrument platform that is supported with a spherical bearing. An apparatus for data acquisition is provided. The apparatus includes a base assembly, a spherical bearing mounted to the base assembly, and an instrument platform having at least one vector component sensor fixed thereto. The instrument platform is mounted on and supported by the spherical bearing. The spherical bearing couples the instrument platform to the base assembly and allows free angular rotation of the instrument platform, within a tilt angle range. The instrument platform is bottom weighted in that it has a center of massdisposed below its center of rotation. The apparatus may include a controller that receives and/or stores data from the at least one sensor.

The invention discloses a moving door mechanism and an air conditioning device. The moving door mechanism comprises a motor, a gear box, a gear, a rack and a moving door, wherein the motor is fixed atthe gear box; the gear is accommodated in the gear box and is connected with an output shaft of the motor; the rack is mutually meshed with the gear; the moving door is fixed on the rack; and the gear box comprises at least one moving component, and the moving component props against the moving door and bears the weight of the moving door. According to the technical scheme, the moving door mechanism is steady to work and does not shake, noise in the motion process is reduced, and the user experience is improved.

The invention relates to an automatic sample feeding device for detecting a chemical oxygen demand of water quality. The automatic sample feeding device comprises a machine box, a Y-axis movement assembly, an X-axis movement assembly and a sample feeding module. The automatic sample feeding device is characterized in that a clamping groove for fixing a test tube rack is formed in a bottom plate of the machine box; a fixing bracket is arranged on the side face of the machine box; the Y-axis movement assembly is fixedly arranged at the upper end of the fixing bracket of the machine box through a screw; the X-axis movement assembly is fixedly arranged on a Y slide block of the Y-axis movement assembly; the sample feeding module is fixedly arranged at the lower end of the fixing bracket. The automatic sample feeding device adopts a quantitative tube device to realize accurate control of liquid feeding amount; a quantitative tube is matched with a liquid level sensor to be used so that an injection molding pump stops a liquid feeding process when the liquid feeding amount reaches the liquid level sensor; a reagent only exists in the quantitative tube and a pipeline and does not flow into the injection molding pump so that pollution and corrosion to the injection molding pump caused by liquid are avoided. According to the automatic sample feeding device, the liquid feeding amount is increased and the sample feeding of two types of liquid can be realized simultaneously.

The invention discloses a security patrol robot for a closed park. The security patrol robot comprises a moving module, and a detection module, a control module, an execution module and a power supply module which are assembled on the moving module, wherein the control module comprises a main control computer in communication connection with a power system, an inertial navigation device in communication connection with the main control computer and a wireless communication mechanism, the main control computer is in communication connection with a remote control end through the wireless communication mechanism, the detection module comprises a camera and a laser radar which are used for collecting pictures, a smoke sensor used for detecting smoke information and a toxic gas sensor used for detecting toxic gas. Compared with a crawler-type mobile chassis, a wheel-type mobile chassis has the advantages of high speed, high efficiency, low motion noise and high flexibility, and can normally operate in an uneven ground working environment; and the camera, the laser radar, the smoke sensor and the poison gas sensor are matched for use, so that security patrol can be effectively carried out in the closed park.

The invention discloses an integral bearing mechanism for a ball screw. The integral bearing mechanism comprises a screw, a flange-type bearing sleeve, a bearing group, a gland and a locking nut, wherein the end part of the screw is provided with a shaft shoulder, and the shaft shoulder is provided with a threaded part; a step-type through hole is formed inside the flange-type bearing sleeve, the step-type through hole consists of a large circular hole and a small circular hole, and the large circular hole and the small circular hole are coaxially arranged; the bearing group consists of at least two bearings of the same model number, and the bearing group is installed in the large circular hole; the gland is of a disc-shaped structure, a shaft through hole is formed in the circular hole, a cylindrical lug boss is arranged on one end of the gland, the lug boss is installed into the large circular hole and fit to the outer end surface of the bearing group; the locking nut is matched with the threaded part of the screw; the inner end surface of the bearing group is fit to a stepped surface formed by the large circular hole and the small circular hole, and the inner end surface of the locking nut is fit to the outer end surface of the gland. By adopting the integral bearing mechanism, the contact rigidity and high-precision stable rotation property of the bearing can be greatly improved; moreover, the positioning precision stability is good.

A bogie skirting board installation structure of a high-speed EMU is characterized by comprising a bogie skirting board, a fixed support, an anti-rotating sliding block, a fastening bolt, a lock nut and safety pins. The bogie skirting board is provided with four sleeve bases, the fixed support is provided with four fixed pins, the four sleeve bases of the bogie skirting board and the four fixed pins of the fixed support are installed in an inserted connection mode, the inner side of the bogie skirting board is provided with a sliding groove, the anti-rotating sliding block is arranged in the sliding groove, and the lock nut is placed in the anti-rotating sliding block and penetrates the fixed support to fasten the bogie skirting board and the fixed support together through the lock nut and the safety pins to form a stable anti-loosing structure. According to the bogie skirting board installation structure, it is guaranteed that the bogie skirting board is not loosened, and the safety of the bogie skirting board is improved. Nylon sleeves are arranged between the sleeve bases and the fixed pins, and motion noises of the bogie skirting board are reduced. The inner side of the bogie skirting board is provided with the sliding groove, the exposed surface is kept smooth, and an appearance effect and an air resistance reduction effect of the bogie skirting board are improved.