8 results about "Impact time" patented technology

The utility model discloses an anti-explosion shield, and belongs to the technical field of shields. The anti-explosion shield comprises a shield back plate, the front end of the shield back plate is fixedly connected with an anti-explosion shield plate, a holding mechanism is arranged above the rear end of the shield back plate, and a fixing mechanism is arranged below the rear end of the shield back plate. The arc-shaped design of the anti-explosion shield plate enables impact force to be dispersed to the whole shield frame along the curved surface, and breakage caused by single-point stress concentration is avoided. According to the structure, impact force is evenly conducted to the shield back plate, the local damage risk is reduced, the overall shock resistance of the shield is improved, and the safety of a shield holder is effectively protected. The buffer hard rubber strip and the connecting strip are arranged in the hollow area between the anti-explosion shield plate and the shield back plate, when the shield is impacted, the buffer hard rubber strip and the connecting strip absorb energy through compression deformation, the impact action time is prolonged, and the instantaneous impact force peak value is reduced. By means of the design, vibration transmission can be greatly weakened, and arm tremor or injury caused by violent impact of a shield holder is prevented.

The application discloses an industrial vehicle vertical reduction gearbox impact test device, which comprises a main frame, a mounting assembly, a plurality of roadblocks, a roller, a roller driving part, a load lifting assembly and a detection assembly, wherein the mounting assembly comprises a fixed part and a movable part, the fixed part is installed on the main frame, the movable part is in sliding connection with the fixed part, and a sample to be measured is installed on the movable part; the roadblocks are detachably installed on the peripheral part of the roller; the roller driving part is used for driving the roller to rotate; the load lifting assembly is used for providing a load for the movable part, so that the sample to be measured is pressed on the roller, and the wheel of the sample to be measured rotates along with the roller; the detection assembly is used for acquiring the impact times, impact force values and acceleration values of the sample to be measured; and a controller is used for acquiring the detection information of the detection assembly and controlling the action of the roller driving part. The industrial vehicle vertical reduction gearbox impact test device has better accuracy, reliability and safety, and can better verify the structure and service life of the reduction gearbox.

The invention discloses an electric steering engine shock resistance control algorithm suitable for a gun shooting environment, and belongs to the technical field of steering engine control. In order to solve the problems of steering engine gear extrusion deformation and control failure caused by transient high overload in the gun shooting process, a multi-source information fusion decision module is introduced on the basis of a double-closed-loop control architecture. The core of the method is that an acceleration characteristic dominant decision is utilized, and the response delay of a sensor is dynamically adjusted by constructing an impact time delay self-adaptive compensation function, so that accurate time sequence prediction of impact moment is realized; and meanwhile, an active micro-motion clamping stagnation detection mechanism based on touch instant return logic is established, the steering engine is driven to perform high-precision micro-amplitude swing within a preset angle range, and mechanical stress is actively recognized and released by monitoring current abnormal feedback. Clamping stagnation and damage of the internal structure of the steering engine under strong impact can be avoided from the source, and the survivability and control precision of a weapon system in an extreme environment are remarkably improved.

The application relates to a floating wind turbine longitudinal and lateral swing coupling control device, which comprises a box body (1) and a magnetic floating layer (2), an electromagnetic layer (3), an impact layer (4), a motion layer (5) and a device cavity (6) installed in the box body (1). The impact block (8) is regulated by the magnetic floating layer (2), the electromagnetic layer (3) and the monitoring control mechanism (10) in the device cavity (6), and the suspension and impact collision are realized in the motion layer (5) between the impact layer (4) and the magnetic floating layer (2). Compared with the prior art, the application has the advantages of less energy demand, flexible impact time point adjustment, stable control effect, automatic device energy supply and the like, can be used for coping with complex external excitation, and better impact damping effect is achieved.

This invention discloses a one-dimensional particle chain buffer that prolongs the impact time, belonging to the field of smart materials design. The invention consists of a composite particle chain composed of three uniform particle chains, all with identical particle material parameters except for yield strength. The delay in impact time can be adjusted by changing the yield strength of the middle particle material; that is, as the yield strength of the middle particle material decreases, the shock wave propagation speed in the particle chain gradually decreases, thereby prolonging the impact time at the output end. This invention provides a novel technical approach for structural protection under low-speed and high-speed impact conditions. By placing this invention between the impact loading end and the impacted structure, the impact resistance of the structure is enhanced by prolonging the impact response time of the impacted structure.

The application discloses a method for testing the impact damage rate of a repair area of a water discharge structure, and specifically comprises the following steps: repairing the repair area of the water discharge structure and installing a flow velocity measuring instrument, opening the sluice to discharge water, obtaining the average water flow impact speed under the water flow impact time t and the recess volume V2 of the repair area, establishing a relationship curve between the water flow impact time t and the recess volume V2, preparing a plurality of repair mortar-concrete test blocks, dividing the test blocks into two groups, using a falling ball impact test device to perform a falling ball impact test on one group of the repair mortar-concrete test blocks, measuring the compressive strength of the other group of the repair mortar-concrete test blocks, calculating the average value of the compressive strength of the other group, calculating the impact damage rate, and establishing a relationship curve between the impact damage rate and the recess volume V1; obtaining the impact damage rate and the water flow impact time t when the recess volume V1 is equal to the recess volume V2, and calculating the impact damage rate. t v f a a a b The impact damage rate obtained by the method is accurate and easy to operate.​​​​​​

A portable measuring device to replace a carnival or fair-ground Hi-Striker is provided, adapted to be used in the gym or as a piece of gym equipment. The device has a target impact area with concentric, differently coloured rings (like a bullseye) that is to be hit, impacted or struck, with a sledgehammer, mace or slam ball. The device can be located horizontally, on the floor, or vertically, on a wall, and can be securely fixed to either. The device measures force, or pressure, of an impact. It can also measure the location, and so determine accuracy (of each impact or force, for example within each of the concentric rings of the target). The device has a display which can display impact parameters, and therefore act as a performance monitor. It may give the number of impacts, time of impacts, location of impacts. The device may therefore give a score or measurement of force combined with accuracy and location.

An impact tool includes a first cover mounted at an end of a first housing facing away from an output mechanism, where a first bearing seat is formed on or connected to the inner side surface of the first cover; a display mechanism including a human-computer interaction assembly and a retaining assembly, where the retaining assembly is used for supporting the human-computer interaction assembly, the retaining assembly is disposed on the outer side of the first cover, the human-computer interaction assembly sets and displays an operation parameter, and the operation parameter includes the rotational speed of a motor and an impact time parameter; and a control mechanism driving the motor according to the set operation parameter so that an output shaft outputs the preset tightening torque.