CN113295366A

CN113295366A - Drop test equipment and drop test method

Info

Publication number: CN113295366A
Application number: CN202110655792.6A
Authority: CN
Inventors: 周益君; 诸渊臻; 孙晓松; 赵峰; 陈扬
Original assignee: Suzhou Yunzhong Electronic Technology Co ltd
Current assignee: Suzhou Yunzhong Electronic Technology Co ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2021-08-24

Abstract

The application discloses drop test equipment and a drop test method, and the equipment comprises: the holding mechanism is used for picking up and releasing the object to be detected, can fall from the initial position to the target position along with the object to be detected, and then releases the object to be detected at the target position to enable the object to be detected to continue to fall; the resetting mechanism is used for picking up the holding mechanism and driving the holding mechanism to lift; and the alignment device is used for enabling the holding mechanism and the object to be detected to move to the specified position in the alignment direction, and the alignment direction is crossed with the falling direction of the object to be detected. Through the reset mechanism and the aligning device which are arranged on the drop test equipment, the position of the object to be tested can be automatically reset without manual intervention, and the high efficiency and the accuracy of the drop test of the same object to be tested are ensured.

Description

Drop test equipment and drop test method

Technical Field

The application relates to the technical field of reliability test equipment of products, in particular to a drop test equipment and a drop test method.

Background

At present, in the production process of products, various performances of the products need to be tested, and whether the products are qualified or not is judged by testing whether the various performances of the products reach the standards or not. The drop test of the product is one of important contents of product performance test, and the drop test performed by a drop test device is a key test item in the technical field of product reliability test.

In the patent with publication number CN206378265U, the electromagnetic falling device can freely fall along with the product, and the electromagnetic falling device is not affected by the friction between the releasing mechanism and the sliding rail during the falling process, so that the acceleration of the electromagnetic falling device during the falling process is not damaged. But above-mentioned scheme can't carry out position adjustment to the article that awaits measuring is automatic when the repetition test, can't ensure that the article that awaits measuring can both be in same initial position when the repetition test, causes the influence to experimental efficiency and accuracy.

Disclosure of Invention

The application provides a drop test device and a drop test method, which aim to solve the problems that the position of an object to be tested cannot be automatically adjusted when the drop test device in the prior art is repeatedly tested, the drop test efficiency is low, and the accuracy is affected.

In a first aspect, an embodiment of the present application provides a drop test apparatus, including:

the holding mechanism is used for picking up and releasing the object to be detected, can fall from the initial position to the target position along with the object to be detected, and then releases the object to be detected at the target position to enable the object to be detected to continue to fall;

the resetting mechanism is used for picking up the holding mechanism and driving the holding mechanism to lift;

and the alignment device is used for enabling the holding mechanism and the object to be detected to move to the specified position in the alignment direction, and the alignment direction is crossed with the falling direction of the object to be detected.

Further, the alignment direction is perpendicular to the falling direction of the object to be tested.

Further, the aligning device comprises a first aligning mechanism and a second aligning mechanism, the first aligning mechanism is used for enabling the holding mechanism to move to the designated position in the aligning direction, and the second aligning mechanism is used for enabling the object to be detected to move to the designated position in the aligning direction.

Furthermore, the first alignment mechanism comprises at least two first air cylinders, and the telescopic shafts of the first air cylinders extend out to drive the holding mechanism to move;

the second aligning mechanism comprises at least two second cylinders, and the telescopic shafts of the second cylinders extend out to drive the object to be detected to move.

Further, when the holding mechanism is reset to the height of the designated position, the two first air cylinders are respectively located on two opposite sides of the holding mechanism, and the two second air cylinders are respectively located on two opposite sides of the object to be measured.

Further, the alignment device further comprises a sensing component for sensing whether the holding mechanism is at the designated position height.

Furthermore, the reset mechanism is provided with a first driving unit, the holding mechanism is provided with a second driving unit, and the first driving unit is used for driving the second driving unit of the holding mechanism and driving the holding mechanism to lift;

the holding mechanism is further provided with a pick-up unit for picking up and releasing the item to be tested.

Further, the object to be tested comprises a weight part and a test sample, and the weight part and the test sample are combined and move synchronously.

Further, the acting force of the reset mechanism for picking up the holding mechanism is magnetic acting force, or vacuum suction force, or clamping force; and/or the presence of a gas in the gas,

the acting force of the holding mechanism for picking up the object to be detected is a magnetic acting force, or a vacuum suction force, or a clamping force; or the holding mechanism picks up and releases the object to be detected through the counterweight, and the acting force of the holding mechanism for picking up the counterweight is a magnetic acting force, or a vacuum suction force, or a clamping force.

Furthermore, the resetting mechanism further comprises a third driving unit, and the third driving unit is used for driving the resetting mechanism to lift.

Further, still include the base, be provided with motor and plummer on the base, the plummer is used for bearing the article that awaits measuring that falls, the motor drives the plummer is at the reciprocating swing of horizontal direction.

The device comprises a frame, a falling maintaining mechanism, a positioning device, a hovering mechanism, a frame and a control device, wherein the hovering mechanism is close to a target position and used for enabling the falling maintaining mechanism to hover at the target position, the resetting mechanism and the positioning device are installed on the frame, and the control device is in communication connection with the maintaining mechanism, the resetting mechanism and the positioning device.

Further, still including enclosing the fender, it locates to enclose the fender the periphery of plummer.

In a second aspect, the present application provides a drop test method applied to a drop test apparatus according to any one of the present applications, including the following steps:

s1: controlling the holding mechanism and the object to be detected to fall from the initial position to the target position, and controlling the holding mechanism to release the object to be detected at the target position and then enabling the object to be detected to continuously fall;

s2: controlling the holding mechanism to pick up an article to be detected, controlling the resetting mechanism to pick up the holding mechanism, and driving the holding mechanism to lift;

s3: and controlling the alignment device to enable the holding mechanism and the object to be detected to move to the designated position in the alignment direction.

Further, the aligning device includes a first aligning mechanism and a second aligning mechanism, and step S3 includes: and controlling the first aligning mechanism to enable the holding mechanism to move to a specified position in the aligning direction, and controlling the second aligning mechanism to enable the article to be detected to move to the specified position in the aligning direction.

Further, step S3 includes:

s31: the acting force of the reset mechanism for picking up the holding mechanism is controlled to disappear;

s32: controlling the second aligning mechanism to enable the article to be detected to move to a specified position in the aligning direction;

s33: controlling the acting force of the holding mechanism for picking up the object to be detected to disappear;

s34: controlling the first aligning mechanism to enable the holding mechanism to move to a specified position in the aligning direction;

s35: and controlling the acting force of the reset mechanism for picking up the holding mechanism and the acting force of the holding mechanism for picking up the object to be tested to recover.

Further, the drop test apparatus further includes a base on which a motor and a plummer are disposed, and the drop test method further includes, before step S1, step S0: controlling the motor to drive the bearing table to swing back and forth in the horizontal direction;

step S1 further includes: after the holding mechanism releases the object to be detected at the target position, the object to be detected falls onto the bearing platform, and the motor is controlled to stop driving the bearing platform to swing back and forth.

Compared with the prior art, the beneficial effects of this application include at least:

according to the drop test equipment and the drop test method, the to-be-tested object falling freely can not turn over through the retaining mechanism arranged on the drop test equipment. Through setting up canceling release mechanical system and the aligning device on drop test equipment, can carry out automatic re-setting to the position of the article that awaits measuring, need not artificial intervention, ensure same article that awaits measuring and fall high efficiency and the accuracy of experiment to and ensure that different article that await measuring fall high efficiency and the accuracy of experiment.

Drawings

The present application is further described below with reference to the drawings and examples.

Fig. 1 is a front view of a drop test apparatus provided in example 1;

fig. 2 is a schematic structural diagram of a drop test apparatus provided in embodiment 1;

FIG. 3 is a flow chart of a drop test method provided in example 2;

fig. 4 is a flowchart of a preferred step S3 of a drop test method provided in example 2;

fig. 5 is a flowchart of a preferred step S0 of a drop test method provided in example 2;

fig. 6 is a schematic view of the drop test device provided in example 1 in a state 1 during a drop test;

fig. 7 is a schematic view of the drop test device provided in example 1 in a state 2 during a drop test;

fig. 8 is a schematic view of the drop test device provided in example 1 in a state 3 during a drop test;

fig. 9 is a schematic view of the drop test device provided in example 1 in a 4 th state during a drop test;

fig. 10 is a schematic view of the drop test device provided in example 1 in a state of 5 th during a drop test;

fig. 11 is a schematic diagram of the drop test device provided in example 1 in the 6 th state during a drop test;

fig. 12 is a schematic view of the drop test device provided in example 1 in a state of 7 in a drop test;

fig. 13 is a schematic view of the drop test apparatus provided in example 1 in a state of 8 during a drop test;

fig. 14 is a schematic view of the drop test device provided in example 1 in a 9 th state during a drop test;

fig. 15 is a schematic view of the drop test device provided in example 1 in a state of 10 during a drop test;

in the figure:

1. a holding mechanism; 11. a pickup unit; 12. a second driving unit;

2. a reset mechanism; 21. a first drive unit; 22. a third driving unit;

3. an alignment device; 31. a first alignment mechanism; 32. a second alignment mechanism; 311. a first cylinder; 321. a second cylinder;

4. an article to be tested; 41. a counterweight; 42. a test sample;

5. a lifting mechanism; 6. a base; 61. a bearing table; 62. fencing;

7. a hovering mechanism; 8. and a frame.

Detailed Description

The present application is further described with reference to the accompanying drawings and the detailed description, and it should be noted that, in the present application, the embodiments or technical features described below may be arbitrarily combined to form a new embodiment without conflict.

The words used in this application to describe positions and orientations, such as "up" and "down", are used in the description of the figures, but may be changed as needed and still be within the scope of the present application. The drawings of the present application are only for illustrating the relative positional relationship, and the dimensions of some parts are exaggerated in the drawing for easy understanding, and the dimensions in the drawings do not represent the proportional relationship of the actual dimensions.

Fig. 1 and fig. 2 are schematic structural diagrams of a drop test device provided in embodiment 1 of the present application, and the drop test device provided in this embodiment specifically includes a holding mechanism 1, a resetting mechanism 2, and a positioning device 3. The drop test equipment can further comprise a base 6, wherein a bearing table 61 is arranged on the base 6, the bearing table 61 is used for bearing or receiving the dropped object 4 to be tested, and the object 4 to be tested comprises a test sample 42 for example.

The holding mechanism 1 is used for picking up and releasing the object 4 to be tested, and can fall from an initial position to a target position along with the object 4 to be tested, wherein the height of the initial position is larger than that of the target position, for example, the holding mechanism 1 enables the object 4 to be tested to continue falling after the object 4 to be tested is released from the target position, and the object 4 to be tested released from the initial position can be prevented from deviating from a preset falling route and falling out of the bearing platform 61. Specifically, when article 4 that awaits measuring in the needs test falls the condition under the specific angle condition, can utilize retaining mechanism 1 is fixed article 4 that awaits measuring and is fallen along the specific angle that awaits measuring, retaining mechanism 1 falls to the target location from initial position along article 4 that awaits measuring, retaining mechanism 1 makes article 4 that awaits measuring continue to fall behind target location release article 4 that awaits measuring, article 4 that awaits measuring can keep the angle that awaits measuring to fall plummer 61, and article 4 that awaits measuring can not turn on one's side.

The resetting mechanism 2 is used for picking up the holding mechanism 1 and driving the holding mechanism 1 to lift. The resetting mechanism 2 can further comprise a third driving unit 22, and the third driving unit 22 is used for driving the resetting mechanism 2 to ascend and descend so as to adjust the height of the starting position of the drop test.

The alignment device 3 is used for moving the holding mechanism 1 and the object 4 to be tested to the designated position in the alignment direction, the alignment direction is crossed with the falling direction of the object 4 to be tested, and the alignment direction is preferably perpendicular to the falling direction of the object 4 to be tested. Taking the falling direction as a vertical direction perpendicular to the horizontal plane as an example, the alignment direction may be a horizontal direction, in other words, the alignment device 3 moves the holding mechanism 1 and the object 4 to be measured to a specified position along the horizontal direction; alternatively, the alignment direction may be an inclined direction other than the horizontal direction, the inclined direction intersects with the falling direction of the object 4 to be measured, and the alignment device 3 moves the holding mechanism 1 and the object 4 to be measured to the specified position along the inclined direction. The designated position may be a starting point position of the drop designated by the holding mechanism 1 and the item 4 to be tested. When the object 4 to be tested is subjected to repeated drop tests, the specified position is the respective initial positions of the holding mechanism 1 and the object 4 to be tested. When repeated drop test is carried out, the aligning device 3 can align the holding mechanism 1 and the object to be tested 4 after dropping in the aligning direction, so that the holding mechanism 1 and the object to be tested 4 are reset to the designated positions, manual intervention is not needed, and the drop test efficiency is improved.

For example, taking the holding mechanism 1 of fig. 6 in the starting position and the holding mechanism 1 of fig. 7 in the target position as an example, the drop test process may include: the reset mechanism 2 can release the retaining mechanism 1 fixed with the article 4 to be measured at the initial position, the retaining mechanism 1 of the article 4 to be measured of fixed releases the article 4 to be measured when falling to the target position, and after the article 4 to be measured falls to the plummer 61, the retaining mechanism 1 picks up the article 4 to be measured, the reset mechanism 2 picks up the retaining mechanism 1, and drives the retaining mechanism 1 resets to the height of assigned position, the aligning device 3 makes the retaining mechanism 1 and the article 4 to be measured move to the assigned position in the aligning direction.

Therefore, the automatic reset of the object 4 to be tested after the drop test is realized through the arranged retaining mechanism 1, the reset mechanism 2 and the aligning device 3. In the reset process, canceling release mechanical system 2 can carry out the ascending reseing of direction of height to the article 4 that awaits measuring is automatic, aligning device 3 resets to article 4 that awaits measuring and retaining mechanism 1 are automatic on the counterpoint direction, and the process of resetting need not artificial intervention, ensures that same article 4 that awaits measuring falls the high efficiency and the accuracy of experiment.

In the specific implementation mode, the object 4 to be tested can be replaced in the process of repeated drop tests to obtain the numerical values of different objects 4 to be tested under the same drop test condition, so that the high efficiency and the accuracy of the drop tests of different objects 4 to be tested are ensured,

the technical solution of the present application is further described below with reference to the accompanying drawings.

In some embodiments, the alignment device 3 includes a first alignment mechanism 31 and a second alignment mechanism 32, the first alignment mechanism 31 is configured to move the holding mechanism 1 to a specified position in the alignment direction, and the second alignment mechanism 32 is configured to move the object 4 to be measured to a specified position in the alignment direction. The first aligning mechanism 31 and the second aligning mechanism 32 may be controlled integrally or separately. When the first aligning mechanism 31 and the second aligning mechanism 32 are respectively controlled, the first aligning mechanism 31 and the second aligning mechanism 32 can align the holding mechanism 1 and the object 4 to be detected step by step to complete the resetting of the object 4 to be detected, and the aligning accuracy is higher.

Further, the first aligning mechanism 31 includes at least two first air cylinders 311, and the telescopic shafts of the first air cylinders 311 extend out to drive the holding mechanism 1 to move; the second aligning mechanism 32 comprises at least two second air cylinders 321, and the telescopic shafts of the second air cylinders 321 extend out to drive the object 4 to be detected to move. When the alignment device 3 uses the air cylinder, the extension length of the telescopic shaft of the air cylinder can be detected and controlled through detection parts such as a magnetic switch, and the like, so that the designated position of the object 4 to be detected in the alignment direction can be adjusted.

Further, when the height of holding mechanism 1 reset to the assigned position, two first cylinders 311 is located respectively the relative both sides of holding mechanism 1, two second cylinders 321 is located respectively the relative both sides of the article 4 that awaits measuring, when holding mechanism 1 resets to the height of assigned position, the telescopic shaft of two first cylinders 311 stretches out the back and can centre gripping holding mechanism 1 to remove holding mechanism 1 to the assigned position through the flexible of telescopic shaft, can centre gripping article 4 that awaits measuring after the telescopic shaft of two second cylinders 321 stretches out, and remove article 4 that awaits measuring to the assigned position through the flexible of telescopic shaft, thereby accomplish holding mechanism 1 with the counterpoint of article 4 that awaits measuring.

In some embodiments, the alignment device 3 further includes a sensing component (not shown) for sensing whether the holding mechanism 1 is at a designated position height. The sensing part can be an infrared sensing part or a photoelectric sensing part or a mechanical sensing part, vibration is generated inevitably during drop test, the photoelectric sensing part is adopted, the anti-interference capacity of the mechanical sensing part is higher than that of the mechanical sensing part, and the photoelectric sensing part is preferably adopted. The sensing component can sense whether the holding mechanism 1 is at a designated position height, and when the sensing component senses that the holding mechanism 1 is at the designated position height, the alignment operation can be carried out.

In some embodiments, the force used by the return mechanism 2 to pick up the holding mechanism 1 may be a magnetic force, or a vacuum force, or a clamping force. The reset mechanism 2 is provided with a first driving unit 21, the holding mechanism 1 is provided with a second driving unit 12, and the first driving unit 21 is used for driving the second driving unit 12 of the holding mechanism 1 and driving the holding mechanism 1 to lift. Preferably, the first driving unit 21 is a ferromagnetic material, the second driving unit 12 is a power-off electromagnet, and the force of the return mechanism 2 for holding the mechanism 1 is a magnetic force. When the second driving unit 12 uses the power-off electromagnet, the power-off electromagnet has the characteristics of power-on and power-off with magnetism, and can do work with magnetism under the condition of no power-on, so that long-time power-on is avoided, and the condition that the electromagnet is burnt out and damaged due to long-time power-on is reduced. When the second driving unit 12 is powered off, the first driving unit 21 and the second driving unit 12 generate magnetic attraction acting force, and the reset mechanism 2 can pick up the holding mechanism 1; when the second driving unit 12 is energized, the magnetic attraction of the first driving unit 21 and the second driving unit 12 disappears, and the restoring mechanism 2 can release the holding mechanism 1.

The holding mechanism 1 is further provided with a pickup unit 11, the pickup unit 11 is used for picking up and releasing the object 4 to be detected, and the acting force of the holding mechanism 1 for picking up the object 4 to be detected can be a magnetic acting force, or a vacuum suction force, or a clamping force. When the object 4 to be tested is a ferromagnetic material, the picking unit 11 may be a power-off electromagnet, and the acting force of the holding mechanism 1 for picking up the object 4 to be tested may be a magnetic acting force. When the pickup unit 11 uses the power-off electromagnet, the power-off electromagnet has the characteristics of power-on and power-off with magnetism, and can apply work with magnetism under the condition of no power-on, so that long-time power-on is avoided, and the condition that the electromagnet is burnt out and damaged due to long-time power-on is reduced. When the picking unit 11 is powered off, the object 4 to be detected and the picking unit 11 generate magnetic attraction acting force, and the holding mechanism 1 can pick up the object 4 to be detected; when the pickup unit 11 is powered on, the acting force of the magnetic attraction between the object 4 to be measured and the pickup unit 11 disappears, and the holding mechanism 1 can release the object 4 to be measured.

In some embodiments, the object 4 to be tested comprises a weight 41 and a test sample 42, and the weight 41 and the test sample 42 are combined and move synchronously. The test sample 42 can be combined with the weight member 41 in various forms of clamping, clamped, adhering, binding, adsorbing and the like, the weight member 41 can be used for simulating different products and falling situations, and the weight of the weight member 41 can be exchanged according to different requirements of the products.

The holding mechanism 1 can pick up and release the test sample 42 through the weight member 41, and the force of the holding mechanism 1 for picking up the weight member 41 can be a magnetic force, or a vacuum suction force, or a clamping force. Preferably, the weight 41 is made of a ferromagnetic material, the pickup unit 11 is a power-off electromagnet, and the force of the holding mechanism 1 for picking up the weight 41 is a magnetic force. When the pickup unit 11 uses the power-off electromagnet, the power-off electromagnet has the characteristics of power-on and power-off with magnetism, and can apply work with magnetism under the condition of no power-on, so that long-time power-on is avoided, and the condition that the electromagnet is burnt out and damaged due to long-time power-on is reduced. When the weight 41 is made of ferromagnetic material, the pickup unit 11 selected from the power-off electromagnet can pick up the object 4 to be tested, which is composed of the weight 41 and the test sample 42 made of any material, and the pickup unit 11 has stronger applicability. When the picking unit 11 is powered off, the counterweight 41 and the picking unit 11 generate magnetic attraction acting force, and the holding mechanism 1 can pick up the object 4 to be detected containing the counterweight 41; when the pickup unit 11 is powered on, the acting force of the magnetic attraction between the weight member 41 and the pickup unit 11 disappears, and the holding mechanism 1 can release the object 4 to be measured.

In some embodiments, a motor (not shown) for moving the carrier platform 61 is disposed on the base 6 of the drop test apparatus, and the motor is converted into a linear motion by a rotational motion, for example, the motor drives the carrier platform 61 to swing back and forth in a horizontal direction by driving a connecting rod (not shown) to move back and forth in a linear motion. Different materials, such as cement surface, rubber surface, wooden face etc. can be chooseed for use according to the experimental needs to plummer 61 to the simulation difference falls the environment. By controlling the speed of the motor, the carrying platform 61 can be swung back and forth in the horizontal direction at a certain speed, for example, the swinging speed of the carrying platform 61 is set to 1.25 m/s to simulate the situation that the object 4 to be measured falls off when an adult walks, or the swinging speed of the carrying platform 61 is set to 6 m/s to simulate the situation that the object 4 to be measured falls off when a bicycle runs.

Further, the drop test device may further include a hovering mechanism 7, where the hovering mechanism 7 is close to the target position, and is configured to hover the dropped holding mechanism 1 at the target position, and after the holding mechanism 1 hovers at the target position, the object 4 to be tested may be released, so that the object 4 to be tested continues to drop. The hovering mechanism 7 may be a spring damper, a hydraulic damper or the like, preferably a hydraulic damper. When a hydraulic damper is used, the kinetic energy generated by the holding mechanism 1 can be better converted into heat energy to be released into the air. The hydraulic buffer has no rebound effect in the process of buffering and hovering the retaining mechanism 1 falling to the target position, and can reduce the vibration and noise of the retaining mechanism 1 hovering at the target position. Therefore, the retention mechanism 1 can be stably and quickly stopped in each buffering process of the hovering mechanism 7, and the process of repeated tests of the drop test equipment is accelerated.

Further, the drop test apparatus further comprises a frame 8 and a control device (not shown). The resetting mechanism 2 and the aligning device 3 can be installed on the rack 8, so that the stability of the resetting mechanism 2 and the aligning device 3 is improved, and the structure of the drop test equipment is more compact. The control device is in communication connection with the holding mechanism 1, the resetting mechanism 2 and the aligning device 3, and the control device is in communication control over the operation of the holding mechanism 1, the resetting mechanism 2 and the aligning device 3.

Further, the drop test equipment further comprises a baffle 62, and the baffle 62 is arranged on the periphery of the bearing table 61. The enclosure 62 is used for preventing the object 4 to be measured from rebounding out of the bearing table 61 during the test, so that the safety of the operation site is improved.

Further, the drop test equipment further comprises a lifting mechanism 5, and the lifting mechanism 5 can adjust the distance between the holding mechanism 1, the resetting mechanism 2, the aligning device 3 and the bearing table 61. According to the requirements of drop tests, the distances among the holding mechanism 1, the reset mechanism 2, the aligning device 3 and the bearing table 61 can be increased through the lifting mechanism 5, and the holding mechanism 1 can be set to be higher than a specified position, so that the drop tests with different height requirements are met.

Fig. 3 is a flowchart of a drop test method provided in embodiment 2 of the present application, and the drop test method provided in embodiment 2 may be applied to a drop test device provided in embodiment 1 of the present application.

The drop test method provided by the embodiment 2 of the application specifically comprises the following steps:

s1: and controlling the holding mechanism 1 and the object 4 to be detected to fall from the initial position to the target position, and controlling the holding mechanism 1 to release the object 4 to be detected at the target position and then enabling the object 4 to be detected to continuously fall.

Specifically, the holding mechanism 1 is controlled to fall from the initial position to the target position along with the object 4 to be measured, the holding mechanism 1 can hover at the target position, the object 4 to be measured continues to fall after the object 4 to be measured is released at the target position, and the released object 4 to be measured can be prevented from turning out of the bearing table 61. The holding mechanism 1 falls along with the object 4 to be tested between the starting position and the target position, and the object 4 to be tested is not easy to shift and turn on one side.

S2: and controlling the holding mechanism 1 to pick up the object 4 to be detected, controlling the resetting mechanism 2 to pick up the holding mechanism 1, and driving the holding mechanism 1 to lift.

Specifically, in the process of the drop test, the position of the article 4 to be tested in the drop direction changes, the resetting mechanism 2 can enable the retaining mechanism 1 and the article 4 to be tested to reset to the height of the specified position, the article 4 to be tested does not need manual intervention in the resetting process, and the efficiency and the accuracy of the repeated drop test are improved.

S3: and controlling the alignment device 3 to move the holding mechanism 1 and the object 4 to be tested to the specified position in the alignment direction.

The designated position may be a starting point position of the drop designated by the holding mechanism 1 and the item 4 to be tested. The position of the object 4 to be tested in the alignment direction may be changed in the process of the drop test, the alignment device 3 enables the holding mechanism 1 and the object 4 to be tested to reset to the designated position in the alignment direction, the process of resetting the holding mechanism 1 and the object 4 to be tested in the alignment direction does not need manual intervention, and the efficiency and the accuracy of the repeated drop test are improved.

In the above drop test method, steps S1-S3 can be performed in a loop. In the process of the drop test, the holding mechanism 1 and the object 4 to be tested synchronously drop between the starting position and the target position, so that the side turning of the object 4 to be tested is avoided. The reset mechanism 2 and the contraposition device 3 reset the object 4 to be detected and the holding mechanism 1 at the positions, so that the high efficiency and the accuracy of the falling experiment of the object 4 to be detected are ensured. Compared with the prior art, the positions of the article 4 to be tested in the falling direction and the alignment direction are the same during repeated tests, and the test result is more accurate.

Further, the aligning device 3 includes a first aligning mechanism 31 and a second aligning mechanism 32. Step S3 includes: and controlling the first aligning mechanism 31 to move the holding mechanism 1 to a specified position in the aligning direction, and controlling the second aligning mechanism 32 to move the object 4 to be detected to the specified position in the aligning direction. Through step S3, the holding mechanism 1 and the object 4 to be measured can be aligned respectively, and the accuracy of the aligning device 3 in resetting and aligning the object 4 to be measured and the holding mechanism 1 in the aligning direction is improved.

Further, referring to fig. 4, step S3 may include:

s31: the force controlling the reset mechanism 2 to pick up the holding mechanism 1 disappears. At this time, the second aligning mechanism 32 can clamp the object 4 to be measured, and since the restoring mechanism 2 picks up the acting force of the holding mechanism 1 disappears, when the second aligning mechanism 32 moves the object 4 to be measured, the holding mechanism 1 can move along with the object 4 to be measured.

S32: and controlling the second aligning mechanism 32 to move the object 4 to be detected to a specified position in the aligning direction, wherein the holding mechanism 1 moves along with the object 4 to be detected in the process.

S33: the acting force for controlling the holding mechanism 1 to pick up the object 4 to be measured disappears. At this time, the object 4 to be measured is held by the second aligning mechanism 32, and the holding mechanism 1 can be moved to facilitate the next alignment of the holding mechanism 1.

S34: the first aligning mechanism 31 is controlled to move the holding mechanism 1 to a predetermined position in the aligning direction.

S35: and controlling the acting force of the resetting mechanism 2 for picking up the retaining mechanism 1 and the acting force of the retaining mechanism 1 for picking up the object 4 to be tested to recover so as to facilitate the object 4 to be tested to continue to carry out the cyclic drop test.

The steps do not need manual intervention, and the alignment and the reset of the object to be detected 4 and the holding mechanism 1 in the alignment direction can be accurately finished.

Further, please refer to fig. 1, the drop test apparatus further includes a base 6, and a motor (not shown) and a bearing platform 61 are disposed on the base 6. Referring to fig. 5, the drop test method further includes step S0 before step S1: and controlling the motor to drive the bearing table 61 to swing back and forth in the horizontal direction. Step S1 further includes: after the holding mechanism 1 releases the object 4 to be tested at the target position, the object 4 to be tested falls onto the bearing table 61, and the motor is controlled to stop driving the bearing table 61 to swing back and forth. When the carrying platform is arranged in a swinging mode, the falling test method can simulate the falling condition of the object 4 to be tested in reality and acquire more required data.

Referring to fig. 6 to 15, in some embodiments, the drop test apparatus related to the method of the present application includes a holding mechanism 1, a resetting mechanism 2, an aligning device 3 and a base 6, where the aligning device 3 includes a first aligning mechanism 31 and a second aligning mechanism 32, the resetting mechanism 2 is provided with a first driving unit 21, the holding mechanism 1 is provided with a second driving unit 12 and a picking unit 11, the resetting mechanism 2 and the aligning device 3 automatically reset the position of an object 4 to be tested, and the object 4 to be tested includes a combined weight 41 and a test sample 42. The first driving unit 21 is made of ferromagnetic material, the second driving unit 12 is a power-off electromagnet, the pickup unit 11 is a power-off electromagnet, the weight member 41 is made of ferromagnetic material, and the base 6 is provided with a bearing table 61 capable of swinging back and forth in the horizontal direction. The drop test using the drop test equipment comprises the following processes:

(1) referring to fig. 6, in the state 1, the second driving unit 12 and the picking unit 11 are powered off and have magnetism, the first driving unit 21 gives an upward magnetic force to the second driving unit 12, and the picking unit 11 picks up the object 4 to be tested by the magnetic force between the weighing member 41 and the picking unit 11. The telescopic shaft of the cylinder of the first aligning mechanism 31 and the telescopic shaft of the cylinder of the second aligning mechanism 32 of the aligning device 3 are in a retraction state, and the bearing table 61 makes reciprocating linear motion to simulate a falling scene.

(2) Referring to fig. 7, in the 2 nd state, the pickup unit 11 remains in a power-off state. The electromagnet of the second driving unit 12 is energized and loses its magnetism, and the magnetic force between the first driving unit 21 and the second driving unit 12 disappears. When the magnetic acting force between the second driving unit 12 and the first driving unit 21 disappears, the holding mechanism 1 and the object 4 to be tested picked up by the picking unit 11 fall freely together, the object 4 to be tested does not receive resistance in the falling process, and the holding mechanism 1 and the object 4 to be tested fall together to prevent the object 4 to be tested from deviating in the falling process and popping out of the bearing platform 61 after falling.

(3) Referring to fig. 8, in the state of type 3, when the holding mechanism 1 falls to the target position, the electromagnet of the pickup unit 11 is powered on and loses magnetism, the pickup unit 11 releases the object 4 to be tested, and the object 4 to be tested continues to fall freely.

(4) Referring to fig. 9, in the 4 th state, the holding mechanism 1 is limited by the hovering mechanism 7 (not shown) near the target position, and the holding mechanism 1 does not fall further. The object 4 to be measured falls on the reciprocating carrier table 61. The carrier 61 stops moving after sensing the falling of the object 4 to be measured, and then the pickup unit 11 loses power and recovers the magnetic acting force on the weight member 41. The method of directly releasing the object 4 to be measured from the initial position with respect to the holding mechanism 1, and simultaneously dropping the holding mechanism 1 and releasing the object 4 to be measured at the target position can prevent the object 4 to be measured from turning out of the carrier table 61.

(5) Referring to fig. 10, in the 5 th state, the reset mechanism 2 moves toward the holding mechanism 1, and the magnetic force is restored between the first driving unit 21 and the second driving unit 12. The second driving unit 12 of the holding mechanism 1 is de-energized and recovers the magnetic force to the first driving unit 21, and the electromagnet of the pickup unit 11 maintains the de-energized state.

(6) Referring to fig. 11, in the state of the 6 th mode, the pickup unit 11 of the holding mechanism 1 picks up the object 4 to be measured including the weight member 41 by the magnetic force, and the second driving unit 12 maintains the power-off state and maintains the magnetic force between the first driving unit 21 and the second driving unit 12.

(7) Referring to fig. 12, in the state of the 7 th mode, the reset mechanism 2 moves to the designated position, the second driving unit 12 of the holding mechanism 1 maintains the power-off state and maintains the magnetic force to the first driving unit 21, and the pickup unit 11 maintains the power-off state and maintains the magnetic force to the weight 41. The reset mechanism 2 drives the holding mechanism 1 and the object 4 to be detected to move to the height of the designated position.

(8) Referring to fig. 13, in the 8 th state, the second cylinder 321 of the aligning device 3 extends and clamps the weight 41, the second driving unit 12 of the holding mechanism 1 is powered on, the magnetic acting force between the holding mechanism 1 and the returning mechanism 2 disappears, the second cylinder 321 moves to complete the returning of the weight 41 and the test sample 42 in the aligning direction, and at this time, the second cylinder 321 maintains the extending state. The holding mechanism 1, the weight 41, and the test specimen 42 are held by the extension of the second cylinder 321.

(9) Referring to fig. 14, in the 9 th state, the pickup unit 11 of the holding mechanism 1 is powered on and loses magnetic force, so that the pickup unit 11 is in a free state in the alignment direction. The first cylinder 311 of the aligning device 3 extends to reset the holding mechanism 1 in the aligning direction, and the first cylinder 311 and the second cylinder 321 of the aligning device 3 maintain the extending state.

(10) Referring to fig. 15, in the 10 th state, the pickup unit 11 is de-energized and recovers the magnetic force with the weight member 41. The pick-up unit 11 is de-energized and recovers the magnetic force, and the holding mechanism 1 is fixed at a prescribed position by the magnetic force with the restoring mechanism 2. Then the first cylinder 311 and the second cylinder 321 are all retracted.

(11) The above test was repeated according to the number of drop tests set in advance.

Through the drop test method demonstrated by the embodiment, repeated drop test data of the object 4 to be tested can be conveniently obtained, manual intervention is not needed in the process, the conditions for dropping the object 4 to be tested are the same every time, and the drop test efficiency and accuracy can be improved through the test method.

While the present application is described in terms of various aspects, including exemplary embodiments, the principles of the invention should not be limited to the disclosed embodiments, but are also intended to cover various modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims

1. A drop test apparatus, comprising:

2. The drop test apparatus of claim 1, wherein the alignment direction is perpendicular to a drop direction of the item under test.

3. The drop test device according to claim 1 or 2, wherein the alignment device comprises a first alignment mechanism and a second alignment mechanism, the first alignment mechanism is used for enabling the holding mechanism to move to a specified position in the alignment direction, and the second alignment mechanism is used for enabling the object to be tested to move to a specified position in the alignment direction.

4. The drop test device according to claim 3, wherein the first aligning mechanism comprises not less than two first air cylinders, and the telescopic shafts of the first air cylinders extend to drive the holding mechanism to move;

5. The drop test apparatus according to claim 4, wherein when the holding mechanism is reset to the height of the designated position, the two first air cylinders are respectively located at two opposite sides of the holding mechanism, and the two second air cylinders are respectively located at two opposite sides of the object to be tested.

6. The drop test apparatus of claim 1, wherein the alignment device further comprises a sensing member for sensing whether the retention mechanism is at a specified positional height.

7. The drop test device according to claim 1, wherein the reset mechanism is provided with a first driving unit, the holding mechanism is provided with a second driving unit, and the first driving unit is used for driving the second driving unit of the holding mechanism and driving the holding mechanism to ascend and descend;

8. The drop test apparatus of claim 1, wherein the item to be tested comprises a weight and a test specimen, the weight and the test specimen being coupled for synchronous movement.

9. The drop test apparatus of claim 8, wherein the force used by the return mechanism to pick up the retention mechanism is a magnetic force, or a vacuum force, or a clamping force; and/or the presence of a gas in the gas,

10. The drop test apparatus of claim 1, wherein the reset mechanism further comprises a third drive unit for driving the reset mechanism to raise and lower.

11. The drop test equipment according to claim 1, further comprising a base, wherein a motor and a bearing platform are arranged on the base, the bearing platform is used for bearing the object to be tested, and the motor drives the bearing platform to swing back and forth in the horizontal direction.

12. The drop test apparatus of claim 11, further comprising a hover mechanism proximate the target location for hovering the drop holding mechanism at the target location, a chassis, and a control device mounted to the chassis communicatively coupling the holding mechanism, the reset mechanism, and the alignment device.

13. The drop test apparatus of claim 11, further comprising a barrier disposed about the periphery of the carrier.

14. A drop test method, characterized in that a drop test apparatus according to any of claims 1-13 is used, comprising the steps of:

15. The drop test method of claim 14, wherein the alignment device comprises a first alignment mechanism and a second alignment mechanism, and step S3 comprises: and controlling the first aligning mechanism to enable the holding mechanism to move to a specified position in the aligning direction, and controlling the second aligning mechanism to enable the article to be detected to move to the specified position in the aligning direction.

16. The drop test method of claim 15, wherein step S3 includes:

17. The drop test method of claim 14, wherein the drop test apparatus further comprises a base on which the motor and the carrier table are disposed, the drop test method further comprising, before step S1, step S0: controlling the motor to drive the bearing table to swing back and forth in the horizontal direction;