780 results about "Pendulum" patented technology

The invention relates to the technical field of engineering control, in particular to a hoisting control method of a safe and portable hoisting cage, which comprises a hoisting pre-stage, data pre-acquisition and analysis before hoisting, a hoisting control stage and hoisting landing control. In the prior art, position closed-loop control mainly depends on a stroke encoder and a position sensor, dynamic swing deviation caused by wind disturbance is difficult to accurately pre-judge and counteract in real time, and the defects of control lag and insufficient response exist. According to the scheme, the motion trail and posture of the cage are predicted in advance based on simple pendulum dynamic model numerical solution and the Runge-Kutta method, high-precision deviation detection is carried out in combination with a virtual-real vision calibration technology and AR enhanced display, a cage motion state control model based on feedforward prediction is established, trail prediction errors are greatly compressed, and the accuracy of the motion state of the cage is improved. The forward-looking inhibition of the movement of the cage, especially wind-induced swinging, is realized, and the accuracy and the response speed of an active swinging inhibition measure are obviously improved.

The proposed invention relates to the furniture industry and can be used for controlling rocking devices, such as beds and chairs with pendulum mechanisms. An external control device for a device for actuating a pendulum mechanism is proposed. The technical result achieved by the claimed invention, in addition to the fulfillment of its intended purpose, is that of overcoming the disadvantages of the prior art and, in so doing, providing universality by permitting installation on both side-to-side and back and forth pendulum mechanisms, as well as providing for ease of use with both side-to-side and back and forth pendulum mechanisms, and also providing for ease of installation and allowing more precise control of a pendulum mechanism.

The proposed invention relates to the furniture industry and can be used for controlling rocking devices, such as beds and chairs with pendulum mechanisms. A pendulum mechanism is proposed. The technical result achieved by the claimed invention, in addition to the fulfillment of its intended purpose, is that of overcoming the disadvantages of the prior art and, in so doing, providing universality by permitting installation on both side-to-side and back and forth pendulum mechanisms, as well as providing for ease of use with both side-to-side and back and forth pendulum mechanisms, and also providing for ease of installation and allowing more precise control of a pendulum mechanism.

The invention relates to a marking and / or leveling device (1) comprising a light source (4) disposed on a pendulum (3) that can pivot relative to a housing (2). According to the invention, means are provided for accelerating (9) the pendulum (3) and / or a pendulum bearing (8) in a pulsing manner.

The invention discloses a linkage differential measurement system and method suitable for micro thrust calibration. The system comprises a linkage differential measurement rack, a liquid metal radio frequency coaxial cable connector arranged on the rack, and a mass center precise regulation and control device arranged on the rack. The linkage differential measurement system provides micro-Newton-level micro thrust except environment common-mode noise; the method comprises the following steps: a torsional pendulum inclination angle control module controls a torsional pendulum inclination angle # imgabs0 #; the centroid position deviation calculation module is used for calculating centroid position deviation; judging whether the offset s of the current centroid position is less than 10 [mu] m or not; the mass center position adjusting module is used for adjusting the mass center position; the gravitational wave micro-thrust calibration torsional pendulum solves the problems that the gravitational wave thruster needs to calibrate thrust noise besides calibrating thrust, high rigidity of a coaxial cable can generate interference on motion of the gravitational wave micro-thrust calibration torsional pendulum, and the gravitational wave micro-thrust calibration torsional pendulum has extremely high requirements on sensing precision of mass center regulation and control.

The invention belongs to the field of precision measurement, and particularly discloses a six-degree-of-freedom ground simulation test device and method for checking mass in-orbit release, and the device comprises a vacuum unit which is used for simulating a space vacuum environment; the second-stage pendulum unit is arranged in the vacuum unit and used for achieving six-degree-of-freedom movement of the inspection mass, the second-stage pendulum unit comprises a first-stage pendulum body connected to the interior of the vacuum unit in a suspended mode, the inspection mass is connected to one transverse end of a suspension connection point of the first-stage pendulum body in a suspended mode, and the other transverse end of the suspension connection point of the first-stage pendulum body is connected with a balancing mass; the locking and releasing unit is arranged in the vacuum unit and is used for locking and releasing the inspection mass; and the detection unit is used for detecting displacement and deflection of the inspection mass. According to the testing device, the six-degree-of-freedom ground simulation test of in-orbit release of the inspection mass can be carried out.

The mechanical overspeed monitoring system comprises a fastening ring, the fastening ring is connected with a main shaft, an overspeed pendulum and a balancing weight are installed on the fastening ring, the overspeed pendulum and a hydraulic switching valve are installed oppositely, and the states of the overspeed pendulum and the hydraulic switching valve are monitored by a high-speed camera; the hydraulic switching valve and the high-speed camera are electrically connected with the mechanical overspeed monitoring host, and the mechanical overspeed monitoring host is electrically connected with the vibration collecting system and the rotating speed collecting system. The system has the beneficial effects of improving the monitoring accuracy, ensuring the stable operation of the system, improving the equipment safety, facilitating fault diagnosis and maintenance and the like, can effectively ensure the safe, stable and efficient operation of the water-turbine generator set, and provides powerful technical support for the long-term stable operation of the set.

The sorting friction structure comprises a driving motor, a driving shaft, a lower bottom plate, a middle floating plate, an ascending top plate, a jacking cam, a transverse moving cam, a vertical jacking plate, a horizontal follow-up plate, a balance wheel assembly and a chain plate, a plurality of first magnets are arranged on the ascending top plate, the jacking cam and the transverse moving cam are arranged on the driving shaft, the vertical jacking plate is connected with the ascending top plate, and a plurality of second magnets are arranged on the horizontal follow-up plate. The horizontal follower plate is connected with the middle floating plate, the balance wheel assembly comprises a plurality of balance wheel units, balance wheel driven components matched with the balance wheel driving components are arranged on the balance wheel units, the balance wheel units penetrate through the ascending top plate, and second magnets are arranged at the tops of the balance wheel units which ascend and descend along with ascending and descending of the ascending top plate; the multiple first magnets and the multiple balance wheel units are arranged in a one-to-one correspondence mode, the first magnets are arranged on the terminal sides of the corresponding balance wheel units in the cargo conveying direction, and the first magnets and the second magnets repel each other. Compared with the prior art, the problem that the sorting wheel and the balance wheel interfere with each other in the prior art is solved.

The invention discloses a mass center regulation and control device and method suitable for micro-thrust calibration torsional pendulum, the mass center precise regulation and control device comprises a double-bottom-plate torsional pendulum base arranged in a vacuum tank, the base is provided with a supporting frame, a pivot and a torsional pendulum, and the supporting frame supports the torsional pendulum through the pivot; the torsional pendulum inclination angle control mechanism is arranged on the driving side of the double-bottom-plate torsional pendulum base, and the mass center position adjusting mechanism is arranged on the double-bottom-plate torsional pendulum base and connected with one end of the torsional pendulum. The controller is arranged outside the vacuum tank; the method comprises the following steps: judging whether the offset s of the current centroid position is less than 10 microns or not, if so, finishing fine adjustment, and if not, continuing to control a torsional pendulum inclination angle # imgabs0 #, and then calculating the offset of the centroid position until the offset s is less than 10 microns; according to the invention, the torsional pendulum inclination angle control resolution of 5 [mu] rad level can be realized, and the centroid positioning precision of 1 [mu] m level can be synchronously reached; 1 [mu] m-level mass center position adjusting resolution can be achieved, and it is ensured that the deflection distance of the torsional pendulum mass center from a rotating shaft is not larger than 10 [mu] m.

The invention provides a graded variable-damping variable-rigidity pendulum type damping device and a vibration attenuation configuration method, the device comprises a damping mounting frame, a single mass block, a vertical guide piece, a nonlinear damping unit, a rigidity adjusting unit and a linear damping unit, and a lower permanent magnet assembly or a lower conductor assembly of the linear damping unit and the single mass block are horizontally limited and vertically decoupled. The method comprises the steps that the swing arm swing length, the horizontal limit displacement and the vertical limit displacement of a single mass block and the optimal damping ratio of a linear damping unit are determined, an optimal damping coefficient determined through the optimal damping ratio is set as a basic damping coefficient, and a nonlinear damping coefficient is increased and adjusted through a nonlinear damping unit on the basis of the basic damping coefficient; and the preset horizontal displacement and the preset vertical displacement of the single mass block are configured according to the horizontal limit displacement of the single mass block. The damping device has the advantages that the damping coefficient is stable when the amplitude is small, and sufficient damping can be provided under extreme conditions.

The utility model belongs to the field of testing devices, and particularly relates to a ship balance testing device, which comprises a device main body, the inner wall of the device main body is provided with a swing structure, the swing structure comprises a rotating shaft, the surface of the rotating shaft is arranged on the inner wall of the device main body, the surface of the rotating shaft is fixedly connected with the surface of a pointer rod, and the pointer rod is fixedly connected with the device main body. The surface of the pointer rod is provided with positioning teeth, and the inner wall of the pointer rod is fixedly connected with a fluorescent strip. According to the ship balance testing device, when a swing structure needs to be adjusted according to a ship body, if the ship body is small, a handle is pulled towards two ends, so that the handle pulls a fixed block to be separated towards two ends, a reed is compressed, and the balance weight pendulum is pushed upwards, thereby reducing a force arm of a pointer rod, and enabling the swing amplitude of the pointer rod to be small; if the ship body is large, the balance weight pendulum is pulled down, so that the force arm of the pointer rod is increased, the swing amplitude of the pointer rod is large, and the detection precision of the detection device is improved.

The invention belongs to the ocean wave energy power generation technology, and particularly discloses a suspended hammer floating type wind-wave combined generator set and a cooperative control method.The combined generator set comprises a semi-submersible floating type platform, a wind power generation device is arranged on the upper portion of the semi-submersible floating type platform, and the semi-submersible floating type platform is anchored by three anchor chains; three power generation sleeves are hinged to the interior of the semi-submersible floating type platform, the lower end of each power generation sleeve is correspondingly installed at the upper end of a variable-length damping inclined supporting rod, the lower end of each damping inclined supporting rod is hinged to a suspension hammer through a universal joint, and the power generation sleeves, the damping inclined supporting rods and the suspension hammer jointly form an inverted-triangular-pyramid-shaped wave energy power generation device. The wind power generation device and the wave power generation device are both controlled by the control system. Through the action of the lower suspension hammer wave energy device, the action of flexibly adjusting the motion response of the upper semi-submersible floating platform and the lower suspension hammer wave energy device is achieved, and the motion response and the borne load of the floating wind generating set are effectively improved.

The invention provides a pendulum type vibration absorber composite loading device in a test state, which comprises a pendulum type vibration absorber 1, a transverse support frame 2, a transverse actuator 3, a transverse force column 4, a longitudinal force column 5, a longitudinal actuator 6, a longitudinal support frame 7, a bottom plate 8, a stress application rod 9, a stress application rod guide key groove 10 and a force column sliding groove 11, a main blade swing type vibration absorber is fixed at the position of a blade bushing, a rotating shaft, a rocker arm and a rocker arm mounting bolt structure adopt false parts, the mounting needs to simulate a real mounting environment, a shell bears a low-cycle load, a low-cycle fatigue test is carried out, and the direction of the rocker arm is parallel to the direction of a blade; the support frame 2 is fixed on the bottom plate 8 through a bolt, keeps the horizontal state of the transverse actuator 3, is provided with a bolt hole, and firmly connects the transverse actuator 3 through the bolt; and the transverse actuator 3 is an action execution part for the test system to carry out a loading test and receive a control command.

The utility model discloses a magnetic leveling device of a pendulum bob type laser demarcation device, which comprises a hanging bracket and a pendulum body hung in the hanging bracket, a magnetic damping body consisting of a plurality of magnets is arranged on the hanging bracket according to a Halbach array, and a magnetic field which is made of non-magnetic conductive materials and can cut magnetic lines in a magnetic field generated by the magnetic damping body is arranged on the pendulum body. The utility model aims to provide a damping piece which adopts two different forms of Halbach arrays to generate magnetic damping, and compared with the existing common magnet arrangement scheme, the magnetic flux is obviously enhanced, so that a stronger magnetic damping effect is generated, and the magnetic damping effect is improved. The magnetic leveling device can effectively prevent the swinging body from swinging excessively, so that the leveling time is effectively shortened, the leveling speed and precision of the laser demarcation device are further improved, and the working efficiency is remarkably improved.

The invention relates to the technical field of automatic warehouse logistics, in particular to a stacking machine platform automatic leveling and winding drum rope winding prevention device which comprises a horizontal moving platform, a vertical frame installed on the surface of the horizontal moving platform, a lifting frame installed on the vertical frame in a sliding mode, an objective table arranged on the lifting frame, a winding drum and a steel wire rope. One end of the steel wire rope is connected with the lifting frame, and the other end is wound on a winding drum driven by a motor. According to the gravity sensing mechanism, the inclination angle of the cargo platform is converted into mechanical displacement through a pendulum bob and a sliding block structure; the gravity center adjusting mechanism transmits pressure through a hydraulic medium to drive a balancing weight to move so as to adjust the gravity center, and the cargo table recovers to be horizontal. And the cable guide mechanism is linked along with the balancing weight through the movable guide wheel group to dynamically compensate the path length difference of the steel wire ropes on the two sides, so that the cooperative control of leveling and winding prevention is synchronously realized, and the stability, safety and reliability of equipment operation are remarkably improved.

The invention relates to a multi-degree-of-freedom composite wave energy converter, and belongs to the technical field of wave power generation. Comprising a mounting frame and a power generation assembly, and the power generation assembly comprises an electromagnetic power generation unit, a nanometer friction power generation unit and a piezoelectric power generation unit; the electromagnetic power generation unit comprises a gravity pendulum and an electromagnetic generator; the gravity pendulum is rotationally mounted on the mounting frame around the gravity center axis of the wave energy converter, and one end of the gravity pendulum is connected with a rotor of the electromagnetic generator; the nanometer friction power generation unit comprises a plurality of power generation parts made of friction materials, the power generation parts are installed on the installation frame, and under the action of external force, the power generation parts move relatively to generate electric energy; the piezoelectric power generation unit comprises a piezoelectric generator and a water flow turbine; a rotor shaft of the piezoelectric generator is connected with the water flow turbine, a rotor of the piezoelectric generator is made of piezoelectric materials, and magnets are arranged on the rotor and a stator respectively. The multi-degree-of-freedom wave capturing device can comprehensively and efficiently capture waves in multiple degrees of freedom, and is high in energy conversion efficiency and wide in application range.

The invention relates to an express balance wheel sorting machine control method and device and a sorting machine, and aims to improve the cargo posture stability and transmission efficiency in the logistics sorting process. The method comprises the following steps: receiving goods sorting path information, and generating a synchronous control instruction including swing wheel disc angle deflection, goods linear speed and a four-wheel belt transmission mechanism; the deflection angle of each swing wheel disc is calculated in real time, and on the premise of ensuring stable conveying of goods and balanced stress of each roller, the optimal rotating speed of a driving wheel is dynamically solved by adopting a multi-target dynamic optimization model on the basis of transmission balance among the driving wheel, a tensioning wheel and a driven wheel, so that the vibration torque of each belt is minimum, and the transmission efficiency is maximized. The control device is composed of a path information receiving module, a control instruction generating module, a swing wheel disc angle control module, a linear speed control module and a shearing vibration control module, efficient, low-energy-consumption, cooperative and intelligent control and stable transmission of the multi-swing-wheel disc sorting mechanism in the sorting process are achieved, and the multi-swing-wheel disc sorting mechanism is suitable for a logistics automatic sorting system.

The invention relates to the technical field of pendulum impact testing machines, in particular to PC material impact resistance detection equipment and a detection method.The PC material impact resistance detection equipment comprises a rack, a base, a sample seat, a swing arm, a pendulum, a motor and a sample, a separation structure is arranged at the top of the rack, and the sample seat is provided with an automatic fixing structure; the separating structure is used for overcoming the counter-acting force of a motor rotor, the automatic fixing structure automatically fixes a PC material sample through rotating force generated by a motor, an electromagnetic sliding block moves outside an electromagnetic sliding rail, the motor is driven to retreat through movement of the electromagnetic sliding rail, and at the moment, an inserting rod moves in an inserting groove. After the motor moves, the first gear and the second gear are separated from the meshing state and are not affected by counter-acting force, and then the detection precision of the pendulum bob on the sample is improved.

The application discloses a pendulum motor with a flywheel (12), where the flywheel (12) is a rotary-inertial element of the pendulum motor that accumulates a torque, where further this accumulated torque through the working axis of the motor (14 or 15) can be used with the necessary force selected to drive selected load mechanisms (generators or similar energy consumption / transformation devices) at moments of time. The torque from the rotating flywheel (12) to the load can be generated through a mechanical speed reducer and / or clutch (18) at selected time periods or moments.

Disclosed in the present invention is a rolling robot, comprising: a housing, which is formed in the shape of a revolving body; two supporting hubs, which are fixed to two sides of the housing; a main supporting structural member, which extends horizontally in a left-right direction in the housing and is connected to the two supporting hubs by means of bearings at two ends of the main supporting structural member; a gravity pendulum, which is connected to the main supporting structural member and is swingable in the left-right direction; a rotating mass block, which is rotatably connected to the main supporting structural member about a rotating axis extending horizontally in a front-back direction when the rolling robot is stationary; a main driving electric motor, which is configured to drive the main supporting structural member, the gravity pendulum and the rotating mass block to rotate in the front-back direction; a gravity pendulum driving electric motor, which is configured to drive the gravity pendulum to swing in the left-right direction; and a rotating mass block driving electric motor, which is configured to drive the rotating mass block to rotate in the left-right direction. In the present invention, the control difficulty of the rolling robot is reduced, high-speed movement can be realized, and jitter of the rolling angle hardly occurs.

The invention discloses a novel pendulum bob impact device and a test method, the device adopts a motor driving rotation mode to rotate a pendulum bob to a specified height, and the repeatability and the accuracy of an experiment result are improved; in the falling process of the pendulum bob, the motor is used for driving the pendulum bob to rotate and energize; the cam structure is arranged to control the motor to be separated from the pendulum bob driving mechanism when the pendulum bob is about to impact the to-be-tested sample, so that the pendulum bob impacts the to-be-tested sample based on inertia and gravity, the control difficulty of experimental equipment can be reduced, the impact effect is closer to the actual impact condition, and the damage and fault risk of the motor can be reduced; in addition, the gel ice and snow plate is arranged around the sample to be tested, so that the actual temperature of the sample to be tested is controlled, and the impact effect at low temperature can be simulated.

The utility model discloses a torsional pendulum type rotational inertia experimental instrument for determining a mass center shaft through multi-point weighing, which comprises a rotating shaft bracket, a central rotating shaft is rotationally arranged on the rotating shaft bracket, a volute spiral spring is arranged on the central rotating shaft, the inner end of the volute spiral spring is fixed on the central rotating shaft, and the outer end of the volute spiral spring is fixed on the rotating shaft bracket. A dial coaxial with the central rotating shaft is fixed on the rotating shaft support, a pointer extending outwards in the radial direction is arranged on the central rotating shaft, and the pointer is used in cooperation with the dial. A first tray is fixed at the top of the central rotating shaft, a plurality of pressure sensors are uniformly distributed at the top of the first tray along the circumferential direction, a second tray for placing an object to be measured is fixed at the tops of the plurality of pressure sensors, and the first tray and the second tray are coaxially arranged with the central rotating shaft. Compared with the prior art, the mass distribution of the object to be measured is measured by adopting the plurality of pressure sensors, and the position of the mass center shaft of the object to be measured can be accurately determined, so that the accurate measurement of the rotational inertia of the object in a complex shape is realized.

The invention relates to a hyper-hemisphere surface topography measuring device which comprises an air floatation rotary table, an air floatation pendulum shaft and an aligning tool. A clamp is arranged on a pendulum shaft of the air floating pendulum shaft, a displacement sensor is arranged on the clamp, and the axis of the air floating pendulum shaft is perpendicular to the axis of the displacement sensor. The axis of the displacement sensor and the axis of the air floating rotary table are located in the same plane. The aligning tool comprises a connecting base, a connecting plate and four screws, the connecting base is fixed to a rotary table of the air-floating rotary table, an ejector rod is arranged in the center of the top of the connecting base, an arc-shaped groove is formed in the bottom of the inner side of the supporting base, the top of the ejector rod is located in the arc-shaped groove, and a gap is formed between the bottom of the connecting plate and the top of the connecting base; threaded holes are formed in the four corners of the connecting base, through holes corresponding to the four threaded holes respectively are formed in the connecting plate, and each screw penetrates through the corresponding through hole and the corresponding threaded hole. According to the invention, precise and efficient measurement of the three-dimensional surface morphology of the hyper-hemisphere can be realized, and the processing precision of ball parts can be improved.

The present invention discloses an electrical energy generating apparatus comprising a pendulum-type structure (100), which includes an arm (101) having permanent magnets (103a, 103b) at end thereof, held in a support frame; a pair of magnetic modules (300a, 300b) disposed adjacent to each extremity of the pendulum swing and provided with pulse-based electromagnets (302a, 302b) housed within a magnetic block (301), triggered by sensors (400a, 400b) to facilitate said pendulum swing motion; said sensors (400a, 400b) associated with each of the modules (300a, 300b) configured to detect a presence of the permanent magnet (103a, 103b); a drive shaft (500) transmitting drive to a gear assembly (600), said shaft configured for rotation dependent upon motion of the pendulum-type structure (100); and a flywheel assembly (700) operatively connected to the gear assembly (600).

The invention relates to the technical field of vibration reduction, in particular to a frequency-adjustable simple pendulum type tuning liquid mass damping device which comprises a swing rod, a mass block, an open container and a damping liquid adjusting mechanism. One end of the swing rod is connected with a to-be-damped structure; the mass block is arranged at the other end of the rigid swing rod; the open container is arranged below the swing rod and used for containing damping liquid to provide damping for the mass block. The damping liquid adjusting mechanism comprises a damping liquid adjuster and a damping liquid container, the damping liquid container is used for containing damping liquid, and the damping liquid adjuster is connected with the damping liquid container and the open container through a pipeline and used for adjusting the depth of the damping liquid in the open container. The problem that an existing simple pendulum type tuned liquid mass damper cannot adapt to the frequency change control requirement, and consequently vibration cannot be effectively reduced under the specific condition can be solved.

The invention relates to the technical field of vibratory hammers, in particular to a pile driver with a self-righting function, which comprises a fixing frame, a shell, a first rotating shaft, a second rotating shaft, an adjusting assembly, a pendulum bob and a driving assembly, the shell is slidably arranged on the fixing frame, the first rotating shaft and the second rotating shaft are rotatably arranged on the shell, and the second rotating shaft rotates around the first rotating shaft on the shell; the first rotating shaft and the second rotating shaft generate resultant force perpendicular to the connecting line direction of the two rotating shafts during autorotation and drive the shell to slide on the fixing frame. The adjusting assembly is used for driving the second rotating shaft to rotate around the first rotating shaft; the pendulum bob is rotationally arranged on the fixing frame, and the gravity center of the pendulum bob is located below the rotating axis of the pendulum bob; the driving assembly is used for driving the shell to rotate when the gravity center of the pendulum bob is located on the axis of the foundation pile. The adjusting assembly is arranged to change the position of the second rotating shaft relative to the first rotating shaft, so that the direction of resultant force generated by rotation of the first rotating shaft and the second rotating shaft is changed, and the inclined foundation pile can be straightened.

The invention relates to a bidirectional electromagnetically-driven rolling pendulum type active and passive composite tuned mass damper. The bidirectional electromagnetically-driven rolling pendulum type active and passive composite tuned mass damper comprises a sliding support and an inertia body. The sliding support is provided with a top side. A recess is formed on the top side of the sliding support. And the shape of the inner wall surface of the concave position corresponds to the whole or part of the spherical crown shape. The inertia body is at least partially contained in the concave position in a sliding mode, and the inertia body is provided with a bottom face. And the shape of the bottom surface of the inertia body corresponds to the whole or part of the spherical crown shape. And the bottom surface of the inertia body is opposite to the inner wall surface of the concave position. One of the sliding support and the inertia body is connected with a plurality of magnets, and the other one is connected with a plurality of electromagnetic windings. And when the sliding support and the inertia body slide relatively, the plurality of electromagnetic windings and the magnet form electromagnetic induction coupling. The electromagnetic control force generated by the electromagnetic winding on the magnet can increase the offset amplitude of the inertia body relative to the balance position, so that the inertia body has larger reset force relative to the sliding support, the bandwidth of the vibration reduction frequency is widened, and the vibration reduction device can adapt to the state of large load or shutdown.

An improved pendulum game apparatus includes a cuboid shaped roof assembly; a cuboid shaped foundation assembly; a frame assembly which connects the cuboid shaped roof assembly with the cuboid shaped foundation assembly, the frame assembly consisting of at least two collapsible cross brace assemblies, each cross brace assembly consisting of four frame arms and a crossmember bracket, the crossmember bracket configured to accept the four frame arms so as to create a cross brace when assembled; a target structure stand assembly, the target structure stand assembly being connectible to the upper side of the base of the cuboid shaped foundation assembly; a plurality of target structures movably attached to the said target structure stand assembly; a pendulum arm; a pendulum cable; and a pendulum bob. The improved pendulum game can include a computer system which enhances the game experience.

The utility model discloses a wear-resistant oscillating bar bearing which comprises an outer ring and an inner ring, and the inner ring is provided with a middle hole; the inner ring is provided with an end ring communicated with the middle hole, the end ring is connected with a spline, the spline is provided with an extension part, the extension part is provided with a positioning bulge, the end ring is provided with a positioning groove corresponding to the extension part, the end ring is provided with a fixed screw pin in a penetrating manner along the radial direction, and the positioning bulge is provided with a limiting screw groove corresponding to the fixed screw pin, so that the inner ring is detachably connected with the spline. The spline assembly is novel in structure, the spline and the inner ring can be detached and separated, the damaged spline can be replaced conveniently, flexibility and convenience are achieved, the connection mode that the spline and the inner ring are welded and fixed in the prior art is replaced, and maintenance cost is reduced.

The utility model provides a building inclination warning mechanism for building detection, which belongs to the technical field of building detection and comprises a mounting plate, a detection component is arranged on one side of the mounting plate, and a stabilizing component for preventing external vibration interference is arranged on one side of the detection component. According to the utility model, through the arrangement of the detection assembly, the installation plate is firmly installed on the wall body through the six fixing holes, when the wall body inclines, the pendulum bob is influenced by gravity, and the gravity center of the pendulum bob is changed, the connection rod is driven to move, so that the pointer on the rotation block rotates, and the angle sensor can monitor the rotation angle of the pointer in real time; the angle change is converted into an electric signal, and once the inclination angle of the wall body exceeds a preset value, the audible and visual alarm on the monitoring shell can be immediately started to send out a strong audible and visual signal to remind personnel that the inclination of the wall body is abnormal.