KR101510184B1 - Impact tester of car-door and computer-readable recording medium having impact testing program - Google Patents

Impact tester of car-door and computer-readable recording medium having impact testing program Download PDF

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Publication number
KR101510184B1
KR101510184B1 KR20140002590A KR20140002590A KR101510184B1 KR 101510184 B1 KR101510184 B1 KR 101510184B1 KR 20140002590 A KR20140002590 A KR 20140002590A KR 20140002590 A KR20140002590 A KR 20140002590A KR 101510184 B1 KR101510184 B1 KR 101510184B1
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KR
South Korea
Prior art keywords
impactor
clamp
electric signal
impact force
impact
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KR20140002590A
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Korean (ko)
Inventor
김재열
곽남수
박대광
김재수
김익태
이민석
오중석
Original Assignee
조선대학교산학협력단
주식회사 호원
주식회사 에이취 케이
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Application filed by 조선대학교산학협력단, 주식회사 호원, 주식회사 에이취 케이 filed Critical 조선대학교산학협력단
Priority to KR20140002590A priority Critical patent/KR101510184B1/en
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Publication of KR101510184B1 publication Critical patent/KR101510184B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • G01M17/007—Wheeled or endless-tracked vehicles
    • G01M17/0078—Shock-testing of vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/08—Shock-testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
    • G01N3/303—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight
    • G01N2033/0083—
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/022—Environment of the test
    • G01N2203/0244—Tests performed "in situ" or after "in situ" use

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The present invention relates to a computer-readable recording medium in which a collision tester and a collision test control program are stored. More specifically, it is possible to perform a local collision test of a vehicle side door by freely dropping an impactor and to confirm test results at a glance A collision tester and a collision tester control program capable of displaying the collision tester control program and the collision tester control program.

Description

Field of the Invention [0002] The present invention relates to a collision tester for a collision test of a vehicle side door,

The present invention relates to a computer-readable recording medium in which a collision tester and a collision test control program are stored. More specifically, it is possible to perform a local collision test of a vehicle side door by freely dropping an impactor and to confirm test results at a glance A collision tester and a collision tester control program capable of displaying the collision tester control program and the collision tester control program.

In general, a collision tester of a vehicle is an experimental device for ensuring the safety of a passenger in the event of a vehicle collision, and a pile of a human shape is carried on the actual vehicle.

In addition, the collision test of the vehicle must be performed variously in the front, rear, side, and upper direction.

In order to solve these problems, a simulated crash tester has been developed. Korean Patent Laid-Open Publication No. 2009-0051570 (a vehicle simulated crash test apparatus) can change the speed of a simulated vehicle to perform a crash test, There is a disadvantage in that it can be performed only.

Korean Patent Laid-Open Publication No. 2006-0067640 (a simulated crash-tester of a vehicle) discloses a test apparatus capable of adjusting a collision angle at the time of a vehicle collision using a simulated vehicle and a plate under the simulated vehicle. However, There is a limitation that only the forward mock collision test can be performed.

Also, since the above-described techniques are not a crash test of an actual vehicle but a crash test of a simulated vehicle, there is a problem that they can be different from the crash test result of an actual vehicle.

The object of the present invention is to provide a computer-readable recording medium having a crash tester and a crash test control program capable of performing a local crash test of an actual vehicle door will be.

It is another object of the present invention to provide a collision tester capable of simultaneously testing impact force, deformation amount, and acceleration (vibration) of a vehicle door and outputting test results at a glance, And a recording medium.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention provides a winch crane capable of lifting a heavy object through a wire; An impactor clam connected to the wire and moving up and down; And an impactor detachably coupled to the impactor clamp and outputting an electric signal that falls freely in the impactor clamp and collides with a local portion of the inspected object to change an impact force.

In a preferred embodiment, the impactor comprises: a lower cover having an upper surface and a lower surface at a central portion thereof penetrating each other and having a hollow therein; A load cell cylinder inserted into the hollow interior of the lower cover, the lower end protruding from the lower surface of the lower cover and being thrown upward when collided with the subject; An upper cover which is defective to the lower cover and has a groove formed at a central portion thereof so that the load cell cylinder can bounce up; A load cell attached to an inner surface of the groove of the upper cover and outputting an electric signal according to a degree of impact when the load cell silencer hits and collides with the load cell; And a load cell plate for attaching the load cell to the inner surface of the groove of the upper cover.

According to a preferred embodiment of the present invention, the impact clamp includes a cover insert groove into which a top end of the upper cover can be inserted, a rod defect groove penetrating toward the cover insertion groove at a predetermined side portion thereof, And an actuator having a rod that can linearly move by hydraulic or pneumatic pressure, wherein the actuator is attached to a side surface of the clamp body, and is attached to a position where the rod can move forward or backward into the rod engagement groove A load engaging groove is formed in a predetermined upper portion of the upper cover so that the upper cover is coupled to the clamp body by being hooked on the advanced rod when the upper end of the upper cover is inserted into the cover insertion groove, The impactor is detached from the impactor clamp and drops freely when the rod is reversed.

In a preferred embodiment, the apparatus further comprises a clamping jig for connecting the wire and the impactor clamp to each other.

In a preferred embodiment, the apparatus further comprises a body fixing frame for fixing the subject to the floor, the body fixing frame comprising: a lower frame placed on the lower floor of the impactor; a plurality A frame including a column frame and an upper frame interconnecting the upper portions of the column frame; A body fixing jig connected to the lower frame and capable of fixing the body to be inspected; And an impactor separation prevention wire that connects the frame and the impactor to each other and prevents the impactor from bouncing to the outside of the frame after colliding with the inspected object.

In a preferred embodiment, the first acceleration sensor is attached to a certain portion of the impactor clamp and senses the acceleration when the impactor is separated from the impactor clamp and outputs an electric signal. And a second acceleration sensor attached to a certain portion of the fixture frame for sensing an acceleration when the impactor impacts the subject and outputting an electric signal.

In a preferred embodiment, the apparatus further includes a strain gauge attached to the subject to output an electrical signal according to a degree of deformation of the subject.

In a preferred embodiment, the operation of the winch crane and the actuator is controlled by connecting the winch crane, the actuator, the impactor, the acceleration sensors, and the strain gauge to control an operation of the winch crane and the actuator, and a controller for converting the electric signal inputted from the strain gauge into a deformation amount or displaying the input time of the electric signal input from the acceleration sensors by time zone.

The collision tester control program may cause the controller to operate the winch crane so that the collision tester can be operated in accordance with the collision tester control program. Winch crane control means for controlling the height of the impactor; An impactor position display means for simulating the height of the impactor and outputting it to a screen; An impact force display means for receiving an electric signal from the impactor and converting the impact into an impact force, and displaying the magnitude of the electric signal input from the impactor or the impact force; And strain amount display means for receiving an electrical signal from the strain gauges and converting the strain into an amount of strain and displaying a magnitude of the electrical signal inputted from the strain gages or a converted strain amount. And further provides a computer-readable recording medium on which the collision test control program is stored.

In a preferred embodiment, the collision tester control program comprises: input signal simulation means for simulating an electric signal input from the impactor, the strain gauge or the acceleration sensors over time and displaying the waveform as a waveform; An impact force simulation means for simulating the impact force converted by the impact force display means according to the passage of time and displaying the impact force waveform as an impact force waveform; Deformation amount simulation means for simulating the deformation amount converted by the deformation amount display means over time and displaying the deformation amount waveform in a deformation amount waveform; And acceleration simulation means for simulating a signal inputted from the acceleration sensor according to the passage of time and displaying the acceleration waveform as an acceleration waveform.

The present invention has the following excellent effects.

First, according to the computer-readable recording medium in which the collision tester and the collision test control program of the present invention are stored, a local collision test of an actual vehicle door can be performed. Therefore, the collision test can be performed at a very low cost There is an effect that a collision test can be performed.

Further, according to the computer-readable recording medium in which the collision tester and the collision test control program of the present invention are stored, it is possible to perform position control and drop control of the impactor through a simple operation, simultaneously measure impact force, deformation amount and acceleration of the vehicle door It can be displayed on the screen, so you can see the test results at a glance.

1 is a view showing a collision tester according to an embodiment of the present invention;
2 is a front view of an impactor of a collision tester according to an embodiment of the present invention;
3 is a side view of an impactor of a crash tester according to an embodiment of the present invention,
4 is an impactor top view of the impact tester according to one embodiment of the present invention,
5 is an impactor top view of a crash tester according to an embodiment of the present invention,
FIG. 6 is an exploded view of an impactor of a collision tester according to an embodiment of the present invention,
FIG. 7 is a diagram showing the function of the collision test control program according to an embodiment of the present invention;
8 to 9 are photographs of a collision tester installation according to an embodiment of the present invention,
FIG. 10 is a graph showing a simulation result of a load cell output signal of a collision tester according to an embodiment of the present invention,
11 is a graph showing waveforms of a load cell output signal of an impact tester according to an embodiment of the present invention,
12 is a view for explaining an attachment position of a strain gauge of a collision tester according to an embodiment of the present invention,
13 to 15 are waveforms simulating an output signal of a strain gauge of a collision tester according to an embodiment of the present invention,
16 to 18 are waveforms simulating the output signal of the strain gauge of the collision tester according to an embodiment of the present invention as a deformation amount,
19 to 21 are waveforms simulating the output signal of the acceleration sensor of the collision tester according to an embodiment of the present invention.

Although the terms used in the present invention have been selected as general terms that are widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, the meaning described or used in the detailed description part of the invention The meaning must be grasped.

Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.

However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals designate like elements throughout the specification.

Referring to FIG. 1, a collision tester 100 according to an embodiment of the present invention includes a winch crane 110, an impact clamp 120, and an impactor 130.

In addition, the collision tester 100 of the present invention may further include a body fixing frame 140 which can fix the subject 10 to the lower floor of the impactor 130.

Further, the body 10 may be a side door of the vehicle.

The winch crane 110 is a crane capable of lifting a heavy object through a wire 111. The winch crane 110 includes a crane support 112 raised on the floor and a wire 111 whose length is adjusted in the vertical direction.

Although not shown, a crane support (not shown) may be provided at the upper end of the crane support 112 with a drill (not shown) capable of guiding the wire 111 and a motor have.

The impact clamp 120 is connected to an end of the wire 111 and moves up and down when the length of the wire 111 is variable.

The impactor 130 detachably attaches to the impactor clamp 120 and separates from the impactor clamp 120 and collides with a local portion of the inspected object 10.

In addition, the impactor 120 outputs an electric signal corresponding to a change in impact force due to a collision with the inspected object 10.

A more detailed description will be given in the description of Figs. 2 to 6.

The body fixing frame 140 serves to fix the body 10 to the floor and includes a frame 141, a body fixing jig 142 and an impactor separation prevention wire 143.

The frame 141 includes a lower frame 141a spaced apart from the impactor 130 and placed on the lower floor of the impactor 130, a plurality of columnar frames 141a spaced apart from each other at the edges of the lower frame 141a, And an upper frame 141c connecting and fixing the upper ends of the column frames 141b to each other.

For example, the frame 141 may have a hexahedral shape. However, any form is possible as long as the subject 10 can be fixed to the lower end and the impactor 130 can fall into the inner space.

In addition, the test fixture jig 142 is fixed to the lower frame 141a and can fix the test body 10.

The impactor departure prevention wire 143 connects the corners of the upper frame 141c and the impactor 130 to each other. After the impactor 130 collides with the inspected object 10, 141 from being blown out.

In addition, the impactor escape prevention wire 143 may be composed of four wires, and the wires connect the different edges of the upper frame 141c to different points of the impactor 130. [

Hereinafter, the configurations of the impactor 130 and the impact clamp 120 will be described in detail with reference to FIGS. 2 to 6. FIG.

2 to 6, the impactor 130 includes a lower cover 131, a load cell cylinder 132, an upper cover 133, a load cell 134, and a load cell plate 135.

The lower cover 131 has a central upper surface and a lower surface that are penetrated to each other, and a hollow portion 131b is formed inside the upper portion of the upper cover.

A load cell support protrusion 131a is formed on the inner hollow portion 131b of the lower cover 131 so as not to protrude downward when the load cell cylinder 132 is inserted.

The load cell cylinder 132 is inserted such that the inner hollow of the lower cover 131 is inserted and the lower end thereof protrudes from the lower surface of the lower cover 131. When the free fall occurs, .

When the load cell cylinder 132 collides with the inspected object 10, the load cell cylinder 132 is guided along the hollow of the lower cover 131 and is thrown upward.

In addition, the load cell cylinder 132 may have a cylindrical outer shape in a transverse direction so as to be supported by the load cell support protrusion 131a.

The upper cover 133 is engaged with the lower cover 131 and a groove 133a is formed at the center of the lower surface so that the load cell 132 can be pulled up when the load cell 132 is bounced.

The load cell 134 is attached to the inner surface of the groove 133a of the upper cover 133. When the load cell 132 is bounced and collides with the load cell 134, an electric signal corresponding to the degree of impact is output.

The load cell 134 is also referred to as a load sensor or a force sensor, and outputs a physical quantity due to an impact as an electrical signal.

The load cell 134 can be classified into a displacement type and a deformable type. If the electric signal can be outputted by an impact, any type of load cell such as a capacitance change type, a resistance change type, a magnetostrictive type, and a piezoelectric type can be used Do.

The load cell plate 135 attaches the load cell 134 to the inner surface of the groove 133a of the upper cover 133.

In addition, the impact clamp 120 includes a clamp body 121 and an actuator 122.

The clamp body 121 has a cover insertion groove 121 through which the upper end of the upper cover 133 can be inserted. The load cell 130 is guided by the cover insertion groove 121, Direction.

The actuator 122 has a rod 122b that is linearly movable by hydraulic or pneumatic pressure and is attached to both opposite sides of the clamp body 121, respectively.

That is, the actuator 122 may include two actuators 122a and 122b.

In the present invention, the actuator 122 is formed of a pneumatic cylinder.

Rod engagement grooves 121b and 121c are formed in the clamp main body 121 to allow the rod 122b of the actuators 122a and 122b to move forward or backward into the cover insertion groove 121. [

In other words, the rod 122b may advance into the cover insertion groove 121 and protrude or be retracted inward of the cover insertion groove 121 to be concealed inside the rod engagement grooves 121b and 121c.

The upper cover 133 can be engaged with the clamp main body 121 by being engaged with the rod 122b advanced when the upper cover 133 is inserted into the cover insertion groove 121, And a load lock groove 133b is formed.

That is, the impactor 130 is coupled to the impactor clamp 120 by the advanced rod 122b. When the rod 122b is moved backward, the impactor 130 is separated from the impactor clamp 120, It will fall free.

The impact clamp 120 may be directly connected to the wire 111. In the present invention, however, the clamp fixture 150 is separately provided for the stability of the exchange or coupling of the impact clamp 120. [

That is, the clamp fixing jig 150 serves to connect the wire 111 and the impact clamp 120 to each other.

In addition, the present invention may include a first acceleration sensor attached to a certain portion of the impact clamp 120 and sensing an acceleration when the impactor 130 is separated from the impactor clamp 120 to output an electric signal, And a second acceleration sensor attached to a predetermined portion of the specimen fixing frame 140 to sense an acceleration when the impactor 130 impacts the inspected body 10 to output an electric signal.

In addition, the first acceleration sensor and the second acceleration sensor can measure the acceleration in the X, Y, and Z axis directions and measure the separation time of the impactor 130 and the impact time of the impactor 130 and the inspected object 10 can do.

That is, the acceleration sensors can measure the time taken for the impactor 130 to separate from the impactor clamp 120 and collide with the inspected object 10.

In addition, the present invention may further include a strain gauge attached to a certain portion of the body 10 to output an electric signal according to a degree of deformation of the body 10.

The present invention further includes a winch crane 110, the actuator 122, the load cell 134 of the impactor 130, the acceleration sensors, and a controller connected to the strain gauge to control overall operation .

 The controller may control the operation of the winch crane 110 and the actuator 122 or may display an electrical signal input from the load cell 134 in terms of an impact force, Or displays the input time of the electric signal input from the acceleration sensors by time zone.

Also, the controller may be a personal computer, a combination of hardware specially designed for the present invention, or a mobile smart device such as a smart phone or a tablet PC.

In addition, the controller is operated by the collision test control program of the present invention.

Also, the collision test control program may be embedded in the controller to function the controller, and may be stored in a storage device such as an HDD, a CD, a USB storage, an SD card, etc. and read by the controller to function the controller have.

In addition, the crash test control program may be provided to the controller in a form of being downloaded from a server system storing the crash test control program.

For example, the server system may include a storage for storing the collision test control program, a data transmission / reception device capable of transmitting / receiving data through a communication network, and a central processing unit capable of transmitting the collision test control program through the data transmission / .

Referring to FIG. 7, the collision test control program 200 includes a winch crane control unit 210, an impact position display unit 220, an impact force control unit 210, The deformation amount display means 230, the deformation amount display means 240, the input signal simulation means 250, the impact force simulation means 260, the deformation amount simulation means 270, the acceleration simulation means 280 and the body display means 290 To enable collision testing to be performed.

The crane control means 210 controls the height of the impactor by operating the winch crane 110 and moves the wire 111 of the winch crane 110 upward, To the screen.

The impact position display means 220 simulates how far the impactor 130 is away from the inspected object 10 under the control of the crane control means 210 and provides the simulated images to the screen.

The impact force display means 230 receives an electrical signal from the impactor 130, converts the electrical signal into an impact force, and displays the converted impact force.

However, the impact force display means 230 may display the electric signal input from the impactor 130 in units of voltage or current without converting the electric signal.

The strain display unit 240 receives an electrical signal from the strain gauges, converts the strain into an amount of strain, and displays a converted strain.

However, the deformation amount display means 240 may display an electric signal inputted from the strain gages in units of voltage or current.

Also, the input signal simulation unit 250 simulates an electric signal input from the impactor 130, the strain gauge, or the acceleration sensors according to the passage of time, and displays the electric signal as a waveform.

In addition, the input signal simulation unit 250 displays the magnitude of the input electrical signal in units of voltage or current, thereby allowing the user to recognize the magnitude of the input signal.

In addition, the impact force simulation unit 260 simulates the impact force converted by the impact force display unit 230 according to the time, and displays the impact force waveform.

Also, the deformation amount simulation unit 270 simulates the deformation amount converted by the deformation amount display unit 240 according to the time, and displays the deformation amount waveform in the form of a deformation amount waveform.

In addition, the acceleration simulation unit 280 simulates a signal input from the acceleration sensor according to the time, and displays the acceleration waveform.

Therefore, the user can check at a glance the change in the impact force, the change in the amount of deformation, and the collision time with the passage of time.

8 to 9 are photographs in which a collision tester is installed for an experiment according to an embodiment of the present invention. The height of a drop of the impactor 130 is 2,000 ± 4 [mm], and a steel beam door, Composite Beam Door and Aluminum Profile Beam Door were tested for collision.

A load cell having a rated capacity of 2,000 [kg], a rated output of 2.0 [mV / V] and a resistance between input and output of 700 ± 10 [Ohms] was used as the load cell 134. The resistance value of the strain gauge was 119.6 ± 0.4 [Ohms] strain gage was used.

10 is a graph simulating electric signals outputted from the load cell 134. The voltage value L_Steel (mV) of the steel beam door is the largest, and the voltage value (L_Al) of the aluminum profile beam door and the voltage value (L_Fiber) followed.

11 shows that the electric signal output from the load cell 134 is converted into an impact force. The steel beam door is 112.3054 [kgf], the aluminum profile beam door is 95.43569 [kfg], and the composite beam door is 73.10939 [kfg] It was confirmed that the maximum impact load occurred in the steel beam door.

Therefore, it can be seen that the aluminum profile beam door has improved strength characteristics by 23.4% compared with the steel beam door, and the composite beam door has a 34.8% strength characteristic as compared with the steel beam door.

12 is a view for explaining attachment positions of strain gauges attached to the test object 10 and showing two points a and b and the impact beam 11 on the outside of the impact beam 11 of the inspected object 10 (S1, S2, S3, S4) on the inner side, and strain gauges were attached to all six points.

In addition, the outer side of the impact beam 11 means the side toward the impactor 130, and the inner side means the opposite side of the outer side.

13 to 15 show the electric signals of the strain gauge measured at four points S1, S2, S3 and S4 on the inner side of the impact beam 11, as shown in Table 1 below.

Mounting position Steel beam door (mV) Composite beam door (mV) Aluminum profile beam door (mV) S1 -0.002320 -0.006599 -0.004152 S2 -0.002310 -0.007723 -0.004512 S3 -0.005940 -0.007205 -0.003524 S4 -0.001539 -0.006654 -0.003105

As shown in Table 1, the output of the strain gauge was the minimum value of the steel beam door, and the aluminum profile beam door was the maximum value of the intermediate value composite beam door.

The composite energy beam door and the aluminum profile beam door are absorbed by the impact force and the deformation energy is large. In the steel beam door, the impact energy is relatively small and the deformation energy is small .

Fig. 16 is a result of strain measurement of the outer two points (a, b) in the steel beam door, Fig. 17 is the strain measurement result of the outer two points (a, b) in the composite beam door, (A, b) in the profile beam door (the result of converting the electrical signal of the strain gauge into a deformation amount).

As can be seen from Figs. 16 to 18, it was confirmed that the strain rate was sequentially increased from the steel beam door to the aluminum profile beam door and the composite beam door.

19 is a result of simulating the output of the second acceleration sensor when the body 10 is a steel beam door, and FIG. 20 is a graph showing the output of the second acceleration sensor when the body 10 is a composite beam door. FIG. 21 is a simulation result of the output of the second acceleration sensor when the inspected object 10 is an aluminum profile beam door.

Acc_x is acceleration in the x axis, Acc_y is acceleration in the y axis, Acc_z is acceleration in the z axis, and Acc_i is acceleration vector sum in the xyz axis.

As can be seen from FIGS. 19 to 21, it is possible to accurately analyze the time of collision with the inspected object 10 and the secondary collision time after the impactor 130 has fallen.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, Various changes and modifications will be possible.

100: Collision Tester 110: Winch Crane
111: Wire 120: Impactor clamp
121: Clamp body 122: Actuator
130: Impactor 131: Lower cover
132: load cell cylinder 133: upper cover
134: load cell 135: load cell plate
140: object fixed frame 141: frame
142: object fixing jig 143: impactor separation prevention wire
150: Clamp fixing jig

Claims (10)

delete A winch crane capable of lifting a heavy object through a wire;
An impactor clam connected to the wire and moving up and down; And
And an impactor which is detachably coupled to the impactor clamp and drops an impact from the impactor clamp and collides with a local portion of the inspected object to output an electric signal that changes according to an impact force,
The impactor:
A lower cover having an upper surface and a lower surface at a central portion thereof penetrating each other and having a hollow therein;
A load cell cylinder inserted into the hollow interior of the lower cover, the lower end protruding from the lower surface of the lower cover and being thrown upward when collided with the subject;
An upper cover which is defective to the lower cover and has a groove formed at a central portion thereof so that the load cell cylinder can bounce up;
A load cell attached to an inner surface of the groove of the upper cover and outputting an electric signal according to a degree of impact when the load cell silencer hits and collides with the load cell; And
And a load cell plate for attaching the load cell to an inner surface of the groove of the upper cover.
3. The method of claim 2,
The impact clamp
A cover inserting groove into which the upper end of the upper cover can be inserted is formed at a lower surface, a rod defect groove penetrating toward the cover inserting groove is formed at a side surface of the clamp body, And
And an actuator having a rod that can linearly move by hydraulic pressure or pneumatic pressure,
Wherein the actuator is attached to a side surface of the clamp body, the rod being attached to a position where the rod can advance or retract into the rod engagement groove,
A load engaging groove is formed at a predetermined upper end portion of the upper cover so as to be engaged with the advancing rod when the upper end of the upper cover is inserted into the cover inserting groove to couple the upper cover to the clamp body,
Wherein the impactor is detached from the impactor clamp and falls freely when the load is reversed.
The method of claim 3,
Further comprising a clamp fixture (jig) for connecting the wire and the impactor clamp to each other.
5. The method according to any one of claims 2 to 4,
Further comprising a body fixing frame for fixing the subject to the floor,
The subject fixed frame:
A frame including a lower frame placed on a lower floor of the impactor, a plurality of column frames erected on the lower frame, and an upper frame interconnecting the upper portions of the column frames;
A body fixing jig connected to the lower frame and capable of fixing the body to be inspected; And
And an impactor departure preventing wire that connects the frame and the impactor to each other and prevents the impactor from being blown out of the frame after colliding with the inspected object.
6. The method of claim 5,
A first acceleration sensor attached to a certain portion of the impactor clamp and sensing an acceleration when the impactor is separated from the impactor clamp and outputting an electric signal; And
Further comprising a second acceleration sensor attached to a certain portion of the fixture frame for sensing an acceleration when the impactor impacts the subject and outputting an electric signal.
The method according to claim 6,
Further comprising a strain gauge attached to the subject to output an electrical signal according to a degree of deformation of the subject.
8. The method of claim 7,
And controlling the operation of the winch crane and the actuator, or converting an electric signal inputted from the impactor into an impact force, connected to the winch crane, the actuator, the impactor, the acceleration sensors and the strain gauge, Further comprising a controller for displaying an electric signal input from the strain gauge in terms of a deformation amount or displaying the input time of the electric signal inputted from the acceleration sensors by time zone.
A computer-readable recording medium having stored thereon a crash test control program for performing a crash test by functioning the controller of the crash tester of claim 7,
Wherein the collision tester control program comprises:
A winch crane control means for controlling the height of the impactor by operating the winch crane;
An impactor position display means for simulating the height of the impactor and outputting it to a screen;
An impact force display means for receiving an electric signal from the impactor and converting the impact into an impact force, and displaying the magnitude of the electric signal input from the impactor or the impact force; And
And strain amount display means for receiving an electrical signal from the strain gauges and converting the strain into an amount of strain and displaying a magnitude of the electrical signal inputted from the strain gages or a converted strain amount, A computer-readable recording medium on which a test control program is stored.
10. The method of claim 9,
Wherein the collision tester control program comprises:
An input signal simulation means for simulating an electric signal inputted from the impactor, the strain gauge or the acceleration sensors according to the passage of time, and displaying the electric signal as a waveform;
An impact force simulation means for simulating the impact force converted by the impact force display means according to the passage of time and displaying the impact force waveform as an impact force waveform;
Deformation amount simulation means for simulating the deformation amount converted by the deformation amount display means over time and displaying the deformation amount waveform in a deformation amount waveform; And
Wherein the collision test control program further comprises: acceleration simulation means for simulating a signal inputted from the acceleration sensor according to the passage of time and displaying the acceleration waveform as an acceleration waveform; .
KR20140002590A 2014-01-08 2014-01-08 Impact tester of car-door and computer-readable recording medium having impact testing program KR101510184B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108507745A (en) * 2018-04-04 2018-09-07 扬州市晨辉机械有限公司 A kind of drop test device and its working method
CN111044245A (en) * 2019-11-29 2020-04-21 东风延锋汽车饰件系统有限公司 Side collision verification device for broken parts of automobile door interior trim panel
KR20210137822A (en) * 2020-05-11 2021-11-18 국방과학연구소 Three-stage hydraulic speed generator operating in dual mode for shock test and driving method thereof

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JPH10151003A (en) * 1996-11-22 1998-06-09 Midori Anzen Co Ltd Device and method for testing impact for shoes

Patent Citations (1)

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JPH10151003A (en) * 1996-11-22 1998-06-09 Midori Anzen Co Ltd Device and method for testing impact for shoes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108507745A (en) * 2018-04-04 2018-09-07 扬州市晨辉机械有限公司 A kind of drop test device and its working method
CN108507745B (en) * 2018-04-04 2024-01-19 扬州市晨辉机械有限公司 Drop test device and working method thereof
CN111044245A (en) * 2019-11-29 2020-04-21 东风延锋汽车饰件系统有限公司 Side collision verification device for broken parts of automobile door interior trim panel
KR20210137822A (en) * 2020-05-11 2021-11-18 국방과학연구소 Three-stage hydraulic speed generator operating in dual mode for shock test and driving method thereof
KR102334229B1 (en) 2020-05-11 2021-12-03 국방과학연구소 Three-stage hydraulic speed generator operating in dual mode for shock test and driving method thereof

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