57 results about "Shock testing" patented technology

A shock testing machine including: a test platform upon which one or more objects to be tested are mounted; one or more rails upon which the test platform is movable in a longitudinal direction; and a braking station for retarding a relative motion between the test platform and the braking station, wherein the test platform and the braking station include at least one portion interfering with the relative motion of the test platform and the braking station such that relative movement of the test platform and the braking station past the at least one portion produces a shock lateral to the longitudinal direction.

The invention discloses a coal and gas co-mining three-dimensional physical simulation comprehensive experiment system, and belongs to the technical field of coal and gas safe co-mining. The system comprises a box, a hydraulic mining unit, a hydraulic loading unit, a ventilation roadway unit, a gas injection control unit, and a test unit. The first surface and third surface, which is opposite to the first surface, of the box are both provided with a gas testing hole. The second surface of the box is provided with an air inlet hole and an air return hole. The fourth surface of the box is provided with a wire outlet hole. The hydraulic mining unit comprises parallelly arranged hydraulic cylinders and support steel bars, and two hydraulic cylinders and the bottom of the box connect and support one steel bar. The hydraulic loading unit comprises a loading frame, which is arranged on the guide rails of the box. The guide rails are arranged on two sides of the box. The ventilation roadway comprises a roadway and a ventilating machine. A high pressure steel bottle in the gas injection control unit is communicated with a multi-way air distribution cabinet through an air distribution pipe, the air distribution pipe is communicated with a sub-pipeline; and the test unit comprises a gas testing unit, a stress testing unit, and a slight shock testing unit.

The invention discloses a shock testing machine. The shock testing machine comprises a shock device and a control system, wherein the shock device comprises a bearing table, an impact pad, a buffering pad and a lifting mechanism; the impact pad is arranged on the bearing table and faces to the buffering pad; the lifting mechanism is connected with the bearing table; the control system comprises a main controller; the main controller comprises a conversion module and a control module; the conversion module is used for calculating the numerical value of the parameter of the impact device needing to be set according to the numerical value of the impact parameter measured due to the requirement of the shock testing machine; and the lifting mechanism is controlled by the control module according to the numerical value of the parameter which needs to be set and is calculated by the conversion module, so as to drive the bearing table to move up and down by the lifting mechanism. The invention further provides a shock testing method; and the shock testing method has high work efficiency and provides the service life of the shock testing machine.

The present invention discloses a vibration and impact test method of server chassis internal and external parameters and a vibration and impact test device of the server chassis internal and external parameters. The vibration and impact test method of the server chassis internal and external parameters is characterized in that during a server vibration and impact test process, the equivalent counter weight blocks in which the acceleration sensors are arranged are arranged inside a server chassis to substitute for a real hard disk, a power supply and an expansion video card, and the built-in acceleration sensors acquire the linear stress and torsion situations of the real hard disk, the power supply and the expansion video card; the acceleration sensors are pasted on the external surface of the chassis to measure the linear acceleration of the pasting points; and the numerical values of the acceleration sensors inside and outside the chassis are utilized to quantize and describe the states of parts during the server vibration and impact test process. The method and device of the present invention help the anti-vibration and anti-impact structure design of the server chassis a lot, provide more determination bases for the reliability test result analysis, and have the characteristics of being test informatization, being high in flexibility, and being easy to operate.

An effective non-intrusive data-based monitoring method may reduce the cost of control loop performance maintenance by screening and short-listing those control loops or valves that need maintenance. The invention comprises a data-based, model-free, non-invasive method that can automatically detect and quantify stiction present in control valves. The method does not require the implementation of any additional valve travel test or, as commonly known, bump test of the control loop. The method may detect and quantify stiction using controlled variable (pv), controller output (op) and set point (sp) data. It does not require valve positioner (mv) data.

The invention relates to a shock test machine which comprises a shock device and a control system. The control system comprises a master controller, and the shock device comprises a lifting mechanism, an impact head driven by the lifting mechanism and an air cylinder arranged opposite to the impact head. The lifting mechanism under control of the master controller adjusts the falling height of the impact head automatically. The master controller further comprises a conversion module and a control module. The conversion module is used to calculate the falling height needed to be adjusted for the impact device and a value of the pressure of the air cylinder according to a predetermined value of acceleration and a predetermined time of residence. The control module is used to control the lifting mechanism to adjust the falling height of the impact head according to the value of the falling height obtained through calculation and adjust the pressure of the air cylinder according to the value of the pressure of the air cylinder. The shock test machine has higher work efficiency and a longer service life. The invention further relates to a method for carrying out the shock test by the shock test machine.

The invention relates to an air impact testing machine for detecting a fragile / fissile cover of a missile storage / transportation launcher. The testing machine comprises a cannon head, an air tank, a testing cylinder, an electromagnetic pneumatic reversing valve and a central control system. The cannon head is transversely arranged in the middle of the air tank; the back end of the cannon head is connected with the front end of the testing cylinder; the back end of the testing cylinder is used for arranging the fragile / fissile cover of the missile storage / transportation launcher for testing; the electromagnetic pneumatic reversing valve is arranged at the front end of the cannon head; and the central control system is connected with a control coil of the electromagnetic pneumatic reversing valve. The invention has the advantages that the pressure distribution on the inner wall of the fragile / fissile cover from the high-speed flowing compressed air during the test is guaranteed to be completely equal to the action force distribution on the inner wall of the fragile / fissile cover from the fuel under the actual use condition, and the stress state of the specimen under the analogue test condition guaranteed to be consistent to the actual use condition; and the air impact testing machine uses the compressed air as power and has the advantages of simple operation, low labor and low cost. The air impact testing machine is suitable to tests in large quantities.

The invention discloses an impact tester and belongs to the test device of impact performance and life estimation of materials such as hard alloy, ceramics and so on. The invention comprises a circulating load power generator, a power control device, a mechanical transmission device, a sample clamp, a heating and temperature regulating device, a support base and so on. The invention fixes the test sample on an impact test clamp and places the test sample in a heating device together with the clamp; the power generated by the circulating load power generator is converted into the impact force and acts on the test sample through the mechanical transmission device; the temperature, the load and the frequency of the impact test are changed by adjusting the temperature regulating device and the power control device. The invention has the functions of temperature regulation, load regulation and frequency regulation, and can evaluate the anti-impact performance and the service life of the sample according to the generation and extension of the cracks and failure condition of the tested sample.

A shock testing machine including: a movable impact mass upon which one or more components to test are mounted; one or more rails upon which the impact mass is movable; and a brake operatively engageable with the movable impact mass after the movable impact mass has moved a predetermined distance to retard the movement of the movable impact mass such that the components to be tested experience a deceleration profile.

The present invention relates to the technical field of vibration impact test equipment and provides a vibration impact test fixture which comprises a fixture body which comprises at least two fixture mounting surfaces and two production installation surfaces. The production installation surfaces are provided with connection pieces for fixing a product, and the two production installation surfaces are fixed to a vibration test platform through fasteners. Since the device is provided with multiple installation surfaces, the installation and test of multiple products can be carried out through replacing different connection pieces. Through arranging the multiple fixture installation surfaces, each direction of the product can be tested, and the vibration impact tests of multiple products can be carried out at the same time. The test time and cost are greatly saved, and the efficiency is improved. About 10 minutes are needed in one time of changing a direction. The vibration force transfer of the vibration fixture is reasonable, and the quality of the vibration test is improved. The removal of the test product is not needed in changing a direction, and thus the probability of the man-made damage of the product is greatly reduced.

A shock testing apparatus comprising:an impact table for supporting an object to be tested;a tank;at least one float;one or more airguns;wherein the at least one float is arranged to float upon a fluid held within the tank and is movable within the tank to impact the impact table in response to the firing of the one or more airguns.

The invention provides a large aircraft temperature shock testing device and testing method, and belongs to the technical field of aircraft testing. Comprising a climate laboratory large chamber used for simulating a low-temperature environment, an environment compartment arranged in the climate laboratory large chamber and used for simulating a high-temperature environment, a hydraulic lifting assembly arranged in the environment compartment, a low-temperature control assembly communicated with the climate laboratory large chamber and a high-temperature control assembly communicated with the environment compartment. The test airplane is converted between two environments in a vertical movement mode, temperature shock environment simulation is achieved, the high-temperature environment is simulated in the environment chamber so that test equipment can be protected, the advantages of energy conservation and emission reduction are achieved, the construction period is short, cost is low, and implementation is easy.

A shock testing machine including: a test platform upon which one or more objects to be tested are mounted; one or more rails upon which the test platform is movable in a longitudinal direction; and a braking station for retarding a relative motion between the test platform and the braking station, wherein the test platform and the braking station include at least one portion interfering with the relative motion of the test platform and the braking station such that relative movement of the test platform and the braking station past the at least one portion produces a shock lateral to the longitudinal direction.

A rotary shock testing machine including: a base; a shaft rotatable relative to the base; a test disc for holding one or more specimens to be tested, the test disc being rotatable with the shaft; an actuator for applying a rotation to the shaft and test disc; and a brake for applying a braking force to the test disc to subject the one or more specimens to a rotary shock.