63 results about "Free falling" patented technology

The invention discloses a tumble detection method, wearable equipment and a storage medium, relates to the technical field of tumble detection, and discloses a tumble detection method applied to the wearable equipment, the wearable equipment comprises an acceleration sensor and at least one other sensor except the acceleration sensor, the tumble detection method comprises the following steps: acquiring acceleration data acquired by an acceleration sensor based on a time sequence; if the acceleration data accord with the free falling acceleration performance in the first time period and accord with the impact rebound acceleration performance in the second time period, it is judged that a falling impact event is detected; in response to the falling impact event, obtaining a falling detection result determined based on detection data collected by other sensors; and if the tumble detection result is that the tumble event exists, triggering a tumble event response process. On the basis, when falling impact is detected, detection and identification are carried out based on other sensor parameters, so that the falling detection accuracy of impact caused by falling is improved.

The present invention relates to a foundation detection device, and in particular to a foundation strength detection device for construction. It comprises a steel drill body, a core hammer, and a handle. The core hammer is slidably mounted on the steel drill body, and a handle is provided on the outside of the core hammer. The device is characterized in that it further comprises a limit device and an automatic reversing mechanism. A groove extending along the length of the steel drill body is provided on the side thereof, and a rectangular groove is provided at an eccentric position of the core hammer, which is connected to the center hole of the core hammer. The present invention achieves the one-way lifting, locking, and automatic release functions of the core hammer through the coordinated cooperation of the limit device and the automatic reversing mechanism. When the core hammer does not reach the standard height, the wedge block can automatically fit into the gap between the inverted trapezoidal blocks to prevent it from falling prematurely. When it is lifted to the set height, the automatic reversing mechanism rotates the wedge block and disengages the limit area, ensuring that the core hammer freely falls and hits the steel drill body at the standard height, ensuring that the energy of each impact is consistent.

The invention relates to the technical field of geological drilling, and discloses a geological prospecting directional drilling device which comprises a base, a material receiving assembly, a rotary disc and a limiting frame, the rotary disc and the limiting frame are arranged on the base, the rotary disc is cylindrical, and the geological prospecting directional drilling device further comprises a plurality of containing grooves which are evenly distributed in the rotary disc with the circle center point of the rotary disc as the center; and the two sliding rods are arranged in each placement groove, and the sliding rods are elastically and slidably connected with the placement grooves. According to the invention, the sections of the bearing pieces are L-shaped, in the descending process of the drill rod due to the self-weight effect, the limiting piece and the two bearing pieces can be tightly attached to the two ends of the drill rod and limit the freedom degree of the drill rod in the falling process, the falling track of the drill rod is guided through the sliding rod and the bearing pieces, and active inclination of the drill rod in the free falling process can be limited; and the falling track of the drill rod is forced to vertically fall relative to the base by taking the preset inclination angle of the base as a reference, so that lap joint or material blockage is avoided.

The utility model discloses a series-connection tensioning type falling mechanism and a gravimeter. The series-connection tensioning type falling mechanism comprises a falling bin, a series-connection rotating mechanism, a tensioning adjusting mechanism, two balance parts and a driving device. The falling prism is located in the falling bin. The serial rotating mechanism is in transmission connection with the two ends of the falling bin in the first direction; the tensioning adjusting mechanism is arranged at one connecting end of the falling bin and the serial rotating mechanism, and the tensioning adjusting mechanism is used for adjusting the tensioning force between the falling bin and the serial rotating mechanism; the two balance parts are in transmission connection with the series-connection rotating mechanism, symmetrically arranged on the two sides of the central axis of the falling bin and used for keeping the whole mass center of the series-connection tensioning type falling mechanism unchanged when the falling bin moves in the first direction; the driving device is connected with the serial rotation mechanism and used for driving the serial rotation mechanism to drive the falling bin to move in the first direction so as to achieve free falling motion of the falling prism in the falling bin.

A device for relieving the right shoulder muscles of a right-handed player when playing a stringed instrument, while simultaneously utilizing the resulting free fall force of the right arm to stabilize the instrument. The device consists of a body support that connects the upper bout of the instrument to the player's torso and an armrest that attaches to the rib of the upward-facing lower bout of the instrument, allowing the right upper arm to rest comfortably. When playing a stringed instrument, the right arm must be constantly held in a forward-raised and laterally abducted position due to the instrument's size, using muscle strength to prevent its weight from altering the instrument's playing position. The armrest allows the upper arm to rest comfortably, thus completely relieving the right shoulder muscles. The body support prevents the upper bow of the instrument from being levered forward and upward when the right arm, with its falling force, acts backward and downward on the lower bow. The device causes the force of fall released by the relaxation of the right shoulder muscles to clamp and fix the instrument between the arm, the leg on which it stands, the body support and the contact point between the base of the instrument and the upper body of the player.

The application discloses a climbing protection device of a power tower, relates to the field of power equipment, and can solve the problem of wasting manpower caused by repeatedly locking and unlocking the locking structure of the connecting safety belt during the process that workers climb the power tower. The power tower comprises a tower body and a climbing pole, the climbing pole comprises a supporting pole and a plurality of hand and foot poles, the climbing protection device comprises a fixing bin and a positioning piece, the fixing bin comprises an upward bin and a downward bin, the upward bin is provided with a first sliding groove, the positioning piece is embedded in the first sliding groove, one end of the positioning piece is connected with a hanging ring, the groove wall of the first sliding groove is connected with a plurality of first limiting components, the first limiting components are provided with limiting surfaces for limiting the downward sliding of the positioning piece, and the first limiting components are further provided with first guide surfaces for facilitating the upward movement of the positioning piece; the downward bin is provided with a second sliding groove, and the groove wall of the second sliding groove is connected with second limiting components for limiting the free falling of the positioning piece along the length extension direction of the second sliding groove.

The invention discloses a fractured rock mass anchor rod anchoring performance impact tensile test system and test method, and relates to the technical field of mechanical property testing. A high-strength spring energy storage mechanism, a double-drop-hammer impact mechanism and a fixed cross beam of the system are respectively mounted on a guide supporting polished rod, and the double-drop-hammer impact mechanism and an impact plate are fixedly connected or not fixed and are respectively used for an impact test of a momentum transfer method and an impact test of a drop-hammer free falling body method. The technical problem that existing test equipment cannot be compatible with two test methods is solved. The test system can be used for carrying out a tensile impact test on the axial anchoring performance of an anchor rod at a rock mass joint surface, switching and integration of an impact test of a momentum transfer method and an impact test of a drop hammer and free falling body method are realized, a tester can provide larger impact energy at a small height, and the test efficiency is improved. Meanwhile, the synchronism of drop hammer impact can be guaranteed, and the impact test system can be suitable for tensile impact performance tests of anchor rods in concrete filled steel tubes and large-size rock masses.

The present application relates to the field of sports testing equipment, and the dry snow landing buffer slope testing device based on dummy ejection impact test simulates the situation when the free-style skiing aerials athlete lands by a series of devices such as pressure gas output device, ejector, test dummy, roller slide carpet and air cushion device, the main process is to provide impact speed for the dummy by the ejector, to build 1:1 roller slide carpet air cushion buffer area at the terminal position, to simulate the impact process of the athlete landing link by the initial speed and impact angle, to accelerate the dummy to a certain speed and fly horizontally out by a set of ejection operation system to simulate the speed state when the free fall is about to contact the snow slope; the angle between the snowboard and the slope surface is simulated by adjusting the foot bottom height of the test dummy when the athlete lands each time; the inclination angle state of the real snow slope is simulated by laying the roller slide carpet with a certain inclination angle; and the mechanical properties of the snow ground are simulated by the air pressure of the air cushion device below the roller slide carpet.

This utility model discloses an adjustable drop test device for metal components, belonging to the technical field of drop test devices. The adjustable drop test device for metal components includes a support base, on the top of which are mounted a vertical drop test component, a spill drop test component, and an adjustable drop impact platform component. The vertical drop test component includes four guide rods fixed to the top of the support base. This utility model, by setting up a horizontal vertical drop test component and a spill drop test component, uses the guide rods as a base and a lifting mechanism to adjust the height of the placement base, combined with a limiting structure to achieve a vertical free fall of the component, thereby simulating drop scenarios at different heights. The spill drop component allows the metal component to be thrown in a parabolic trajectory, recreating an accidental drop. Therefore, this device can simulate both vertical and spill drop scenarios of metal components, solving the problem of the limited functionality of existing drop test devices and improving its practicality.

The invention discloses a device for acoustically detecting the height of a free falling body, and the device comprises a mobile control frame, the upper end of the mobile control frame is fixedly connected with an N-shaped lifting frame and a detection box, the detection box is located at the inner side of the N-shaped lifting frame, and the inner side of the N-shaped lifting frame is movably connected with a clamp. According to the device for acoustically detecting the height of the free falling body, a clamp is positioned on the inner side of an N-shaped lifting frame, a control motor drives an inner main rotating rod to drive a first bevel gear to rotate, and a second bevel gear on the outer wall of the first bevel gear can drive a vertical rotating rod and a control threaded rod to rotate; the lifting block controls the outer wall of the threaded rod to ascend and descend, meanwhile, the clamp is driven to ascend and descend on the inner side of the N-shaped lifting frame, the clamp can clamp an object to adjust different heights for falling detection, the initial falling height of the object can be accurately controlled, and personal errors caused by manual adjustment of the height of the object can be reduced.

The invention provides a repeated jettisoning test device and method. The repeated jettisoning test device comprises a rack, a jettisoning piece, a lifting assembly and a disengaging mechanism. The throwing piece is connected to the rack in a sliding mode and moves in the throwing direction, and the throwing piece is provided with a connecting end used for being connected with a hanging basket and a telescopic plunger; the lifting assembly drives the movable end of the lifting assembly to move upwards or downwards and is used for moving upwards to push the plunger to be lifted or moving downwards to push the plunger to retract. The separating mechanism is installed on the machine frame, and the separating mechanism is provided with an abutting end arranged on the lifting track of the plunger. A structure capable of repeatedly throwing the hanging basket is formed by the rack, the throwing part, the lifting assembly and the separation mechanism, the throwing part can be driven to carry out repeated actions during lifting and free falling throwing under the reciprocating action of the lifting action of the lifting assembly, a repeated throwing test of the hanging basket is carried out, separation of hoisted heavy objects below can be automatically completed, and the work efficiency is improved. Manual repeated hooking is avoided, and the circulation time is short.

The utility model discloses a simulation device for a free fall experiment. The simulation device comprises a base, a bearing mechanism is arranged above the base, a top plate is arranged above the bearing mechanism, supporting frames are detachably arranged between the top plate and the bearing mechanism, and every two adjacent supporting frames are detachably connected. Two sets of timing mechanisms are detachably arranged on the inner side of the supporting frame, the two sets of timing mechanisms are distributed up and down, an electromagnet is arranged on the top plate in a penetrating mode, the electromagnet and the timing mechanisms are connected with a control box, and the control box is arranged on the base. The detachable base, the supporting frame, the top plate, the timing mechanism and the like are arranged, the device can be detached before the device needs to be transferred, the components can be transferred by teaching personnel, or a single component can be transferred by a plurality of students, the current situation that the device cannot be detached and needs to be cooperatively moved by a plurality of personnel is changed, and the practicability is high. Teaching personnel or students can conveniently transfer the teaching aid to classrooms of different floors.

The utility model provides an auxiliary mounting device for a sound barrier, and belongs to the field of sound barrier construction. According to the technical scheme, the construction operation fence comprises a forklift and a construction operation fence body arranged on fork arms of the forklift, a telescopic bracket is arranged on the construction operation fence body, the construction operation fence body comprises a bottom plate, a pair of rectangular insertion sleeves are arranged at the bottom of the bottom plate, the fork arms of the forklift are arranged in the rectangular insertion sleeves respectively, and guardrails are arranged on the peripheral edges of the bottom plate. A pedal is arranged between the peripheral guardrails and above the bottom plate, a position adjusting assembly is arranged below the pedal and on the bottom plate, and a pair of telescopic brackets is arranged on the position adjusting assembly. The utility model has the beneficial effects that the structure is simple, the use is convenient, the situation that the screen body is damaged due to collision caused by free falling is effectively avoided, and the mounting quality and efficiency are improved.

The steam turbine nut dismounting anti-falling device comprises a lifting rod, a first installation hole is formed in the bottom face of the lifting rod, a first hanging rod is fixedly installed on the first installation hole, and a first hook is hung on the first hanging rod; and an anti-falling disc is arranged below the lifting rod. A second mounting hole is formed in the surface of the anti-falling disc, a second hanging rod is fixedly mounted on the side wall of the second mounting hole, and a second hook is arranged on the second hanging rod. The second mounting hole is located in the center of the anti-falling disc. The length of the lifting rod is larger than the diameter of the anti-falling disc. The anti-falling device has the advantages that the chain can be hung, the anti-falling disc is connected with the chain from the bottom of the stud, the risk that the stud and a nut fall off due to free falling when the vertical high-temperature stud is disassembled can be effectively prevented, use is safer and more reliable, safety of operators is guaranteed, the height can be adjusted at will, operation is more flexible, and the anti-falling device is suitable for popularization and application. The application range is wide.

The utility model discloses a through hole crushing device for a vertical blast hole. The through hole crushing device comprises a hammer head, a balancing weight, a drop hammer sheath and a hammering rod, the hammer head is in a cross cone shape; the balancing weight is cylindrical, and the lower end of the balancing weight is detachably connected with the hammer head; the lower end of the drop hammer sheath is detachably connected with the upper end of the balancing weight; and the hammering rod is arranged in the drop hammer sheath in a sliding manner. According to the utility model, a combined type crushing principle, namely a free falling body and secondary hammering mode, is adopted, so that the crushing efficiency is obviously improved, and the energy consumption is reduced at the same time; the device is ingenious in design, easy and convenient to operate and capable of rapidly dealing with crushing operation of various hard rock stratums, and the working efficiency of a construction site is greatly improved. And in addition, the manufacturing cost is relatively low, maintenance is easy, and the application range is wide.

The utility model discloses a digital engineering investigation in-situ testing device, which relates to the technical field of geological drilling and comprises a drill tower and a hydraulic lifting device, a driving device is mounted on the hydraulic lifting device, and a striking device is connected onto the hydraulic lifting device through the driving device; the striking device comprises a guide rod, a hammering seat, a standard penetration hammer and a lifting block, and a hammer lifting device is arranged between the standard penetration hammer and the lifting block; according to the design, the stepped groove is formed in the guide rod to be matched with the hammer lifting device, it can be ensured that the standard penetrating hammer freely falls down to hammer the hammering base after rising to the designated position, the striking operation is completed, excessive manual operation is not needed, time and labor are saved, and safety and reliability are achieved; the problem that in traditional standard penetration operation, a standard penetration hammer needs to be lifted through winch lifting and manual rope hanging is solved.

The elevator landing door counter weight assembly comprises a guide assembly and a landing door counter weight, the landing door counter weight moves under the guidance of the guide assembly through traction of a steel wire rope, the guide assembly comprises a guide piece and a guide frame, and the guide piece is arranged on the guide frame in a hooping mode so as to be fixed to an elevator landing door system through the guide frame; the landing door heavy hammer comprises a heavy hammer body and a blocking piece arranged on the heavy hammer body. The blocking piece is located above the gravity direction of the guiding piece, and when a steel wire rope pulling the heavy hammer body to move is broken, the guiding piece supports the blocking piece to prevent the heavy hammer body from falling off. According to the heavy hammer, the blocking piece is arranged on the heavy hammer body and located above the gravity direction of the guide piece, and when the steel wire rope is broken and the heavy hammer body freely falls, the guide piece supports the blocking piece to prevent the heavy hammer body from continuously moving, so that the heavy hammer body is prevented from continuously falling and falling, and the service life of the heavy hammer body is prolonged. Other structural components of an elevator system are damaged; and the personal safety of elevator pit maintenance personnel is threatened.

The present application relates to a kind of multifunctional angle-changing slamming tower for ship bow free-fall slamming test, comprising top frame, left and right sides of the top frame are respectively provided with left arm frame and right arm frame, the inside of the left arm frame is provided with left rotating rotary frame, the inside of the right arm frame is provided with right rotating rotary frame, the middle part of the left arm frame is provided with linear guide rail angle drive mechanism for controlling the rotation of left rotating rotary frame, the left side surface of the left arm frame is provided with arc plate, and the arc plate is provided with rotating positioning hole for controlling the rotation of left rotating rotary frame;Electromagnet, movable module and variable heeling device are sequentially arranged below the middle part of the top frame, left and right sides of the movable module are provided with left support frame and right support frame, and the side surface of left rotating rotary frame, right rotating rotary frame, left support frame and right support frame is provided with linear guide rail.The present application can realize angle-changing and height adjustment of free-fall slamming test without changing tooling.

An electrical appliance comprises an electric motor, a sensor to detect whether the electrical appliance is in free fall, and a controller to receive fall data from the sensor. In the event that the e

The present application relates to a kind of safety devices for preventing the free falling of steel pipe end milling machine milling clamping body, the device is newly provided with anti-falling mechanism on steel pipe end milling machine, the mechanism is composed of piston type air cylinder β, push-pull plate, connecting seat and support bar and other components, three-way two-position direct-acting electromagnetic valve is used to adjust high-pressure air to control the extension and retraction of piston rod β, piston rod β drives two support bars to slide in guide bushing by connecting seat and push-pull plate, after the completion of steel pipe end face milling operation, drive support bar to extend outward into the inner circle of upper semicircle clamping body, stably hold upper semicircle clamping body to prevent it from falling, safe and reliable;Thus effectively avoid the phenomenon of upper semicircle clamping body falling due to accidental failure or personnel misoperation, ensure the safety of worker maintenance operation.

The utility model discloses a demonstrator for physical free fall, which belongs to the technical field of free fall demonstration devices, and is characterized in that the surface of a demonstrator shell is provided with scale marks, the side surface of the demonstrator shell is rotatably connected with an adjusting shaft through a sealing bearing, and the surface of the adjusting shaft is connected with two threaded sleeves through threads; the demonstrator comprises a demonstrator shell, two threaded sleeves are arranged in the demonstrator shell, a first baffle and a second baffle are fixedly connected to the surfaces of the two threaded sleeves respectively, an upper cover is inserted into one end of the demonstrator shell, and a first placement groove and a second placement groove are formed in the surface of the upper cover. According to the circulating demonstrator, the demonstrating objects can be rapidly and circularly demonstrated, the use convenience is greatly improved, the adjusting shaft, the guide rod and the knob are arranged, a user can conveniently and synchronously control the moving positions of the two baffles, the two demonstrating objects can synchronously fall off, and the demonstrating effect is improved.

The utility model provides an air conditioner outer box waterproof base with a drainage structure, and relates to the technical field of air conditioner outer boxes, the air conditioner outer box waterproof base comprises a V-shaped plate, the two ends of the V-shaped plate are fixedly connected with folded plates, one end of each folded plate is fixedly connected with a square plate, and the top of the V-shaped plate and the top of each folded plate are provided with water guide grooves. The top of each square plate is provided with a trapezoidal groove, the trapezoidal grooves communicate with the water guiding grooves, the bottom, close to one end, of each square plate is fixedly connected with a pipe connecting head, the pipe connecting heads communicate with the trapezoidal grooves, and vertical plates are symmetrically and fixedly connected to one side wall of the V-shaped plate. According to the utility model, through the structural design of the V-shaped plate, the water guide groove, the trapezoidal groove and the like, a perfect drainage channel is formed, accumulated water can be quickly and effectively guided to be drained, meanwhile, a pipeline can be connected to the connecting pipe head, and the drained water can be drained along the pipeline, so that the effect of preventing the water from falling to an object or a human body in a free falling state can be achieved.

The utility model relates to the technical field of candy production detection equipment, in particular to an empty candy bag screening structure which comprises a blanking bin and a fan, the blanking bin comprises an inlet cavity, an air inlet cavity, an empty bag outlet cavity, a free falling cavity and a candy outlet cavity, the top of the free falling cavity is communicated with the inlet cavity, and the top of the free falling cavity is communicated with the air inlet cavity. The bottom of the free falling cavity is communicated with the candy outlet cavity, the two sides of the free falling cavity are communicated with the air inlet cavity and the empty bag outlet cavity respectively, and an air outlet of the draught fan faces the air inlet cavity. The empty bag candy screening device has the advantages that empty bag candies are blown to the empty bag outlet cavity through the draught fan, and the effect that the empty bag candies are screened out in batches is achieved.

The present application provides a kind of harness impact test device and test method, operate with two semicircular buckles, semicircular buckle is located in the end of operating band, left and right ends of main cover plate each has a semicircular boss, left and right symmetrically arranged protruding vertical baffle in middle part, semicircular boss is symmetrically opened with countersunk hole between vertical baffle;Side limit block, center limit block and side limit block are sequentially placed, coaxial center hole is arranged on it, force center shaft passes through center hole so that semicircular buckle is located between left and right symmetrically arranged limit block and center limit block, and force center shaft is fixed with the same two main cover plates at both ends.Semicircular buckle and impact test device relative position do not change, harness double shoulder stress is uniform;Each fastener is hidden through countersunk hole, to prevent hooking;Change test dummy structure, and increase steel wire rope as guide, so that dummy free fall, along vertical steel wire rope sliding, control dummy posture, avoid dummy roll.

This invention provides an integrated demonstration device for the isochronous propagation of projectile motion, comprising a base plate and a rotating frame. The rotating frame is rotatably connected to the base plate. A handle is provided on one side of the rotating frame, with the connection between the rotating frame and the base plate as the boundary, and a cylindrical assembly is provided on the other side. An end seat is also provided on the side of the base plate with the cylindrical assembly, and a cylinder is mounted on the end seat. A channel is provided on the base plate to allow a small ball in the cylinder to fall freely. This invention enables flexible changes in the initial velocity of the projectile, overcoming the limitation of fixed initial velocity in existing devices. It can intuitively demonstrate that "projectile motion and free fall with different initial velocities land simultaneously" and "the isochronism between projectile motion and uniform linear motion with a constant initial velocity," directly verifying that "the time of projectile motion is independent of the initial velocity," thus overcoming the limitation of existing devices that cannot compare motions simultaneously.

The invention relates to the technical field of impact energy testing, and discloses a pendulum bob device based on single impact energy calibration, which comprises a bottom plate, and a slide block guide rail is arranged on the top surface of the bottom plate; one end of the swing rod module is connected with the bottom plate, and the other end is vertically upward; the top of the swing rod is hinged to the swing rod module, and the other end of the swing rod is connected with a swing block; the impact rod fixing module is matched with the sliding block guide rail; the cement block moving module is arranged at the end, away from the swing rod module, of the sliding block guide rail. An angle encoder; during use, the swing rod is lifted to a preset angle, the swing rod is released, the test rod exerts impact force on the stress surface of the cement block moving module, the swing angle variable quantity and the instantaneous angular speed of the swing rod are collected in real time through the angle encoder, and one-time impact calibration is completed. According to the invention, by arranging the swing rod module hinged with the swing rod, the swing rod can swing, and then the swing block used for fixing the test rod is connected with the swing rod, so that an existing free falling body test is changed into a simple pendulum test, the centering difficulty is reduced, and the test precision is improved.

This invention discloses a constrained free-fall type fragile cover impact test system and method, belonging to the field of mechanical equipment performance testing. It includes: a support base to ensure the guide frame is perpendicular to the ground; an impact projectile suspended within the guide frame, with an adjustable height; the guide frame connected to the fragile cover by fasteners, simulating the constraint and guidance of the launch box / tube on the impact projectile, allowing the projectile to impact the fragile cover in free fall without jamming or eccentricity; and a sensor for measuring the impact force. This invention replaces the constraint and guidance of the launch box (tube) on the projectile with the constraint and guidance of the guide frame, utilizes the principle of free fall to represent the velocity of the projectile impacting the fragile cover, and measures the impact force that breaks the fragile cover using a sensor. The structure is simple, significantly reducing testing costs; it offers good guidance and centering accuracy, preventing projectile eccentricity and accurately simulating actual working conditions; the fragile cover is easy to assemble and disassemble, resulting in high testing efficiency.

A lift assist system for a tow bar. The system exerts a force exerted on the tow bar to generate an upward moment that counters a downward moment generated by the weight of the tow bar assembly. The greatest upward moments are generated from a lowered configuration through at least a horizontal configuration of the tow bar, thereby providing the greatest degree of lift assistance for the operator when the downward moments are the greatest. A stop assembly may be included that limits how far the tow bar can arc below the equilibrium height in normal operation to prevent the tow bar from reaching the ground during a free fall, thus providing a measure of safety against injury to operating personnel. The lift assist system may depend from flexible suspension members to protect components from excessive stresses in the event of a forced grounding of the tow bar.