KR101980654B1 - Acceleration Test Apparatus - Google Patents

Abstract

According to the present invention, proposed is an acceleration testing device comprising: a first rotating shaft which can be rotated; a rotating arm provided on the rotating shaft; a test object mounting base provided on one side of the rotating arm, and on which a test object is mounted; and a rotation removing part provided so as to be connected to the rotating shaft and the test object mounting base to remove a rotation of the test object on the mounting base. Therefore, an objective of the present invention is to provide the acceleration testing device capable of being installed in a small space.

Description

[0001] ACCELERATION TEST APPARATUS [0002]

The present invention relates to an acceleration tester, and more particularly to a centrifugal acceleration tester having a function of preventing rotation of a test object.

Equipment mounted on a moving object such as a vehicle or an aircraft should operate normally in a situation where an acceleration load due to the starting of the moving object is applied, and the structure should be safe. Therefore, in the development process, the equipment mounted on the moving object is verified by using the acceleration test device. In particular, equipment mounted on an aircraft should be tested for the level of operating acceleration required to maintain its function and performance and the level of durability acceleration that the equipment must withstand without damage, provided the acceleration is applied by the aircraft. That is, the equipment mounted on the moving object is designed in consideration of not only the acceleration but also the vibration, impact and the like, and the test is performed to verify it. Here, the acceleration refers to an acceleration applied for a sufficiently long time as compared with the operation characteristics of the equipment. Therefore, the acceleration test tests the suitability of the equipment for operation, performance, durability, etc., by the acceleration applied to the equipment for a sufficiently long period of time.

Acceleration testing devices include centrifugal acceleration testing devices, linear acceleration testing devices, and curved acceleration testing devices. The centrifugal acceleration test apparatus is equipped with a mounting base on a rotary arm mounted on a rotary shaft, and a slip ring and a rotary joint are mounted on the rotary shaft so that the test object can be connected to the power supply and the signal line. do. This centrifugal acceleration testing device can be used to test signal processing inside the equipment and non-directional external interlocking.

The linear acceleration test system installs a vehicle equipped with an accelerating device and a decelerating device on a straight rail, tests the equipment in the required acceleration section and deceleration section by mounting the test object on the vehicle. However, since the linear acceleration test apparatus requires a very long travel distance of about 10 km, a rail of several kilometers should be installed. Also, careful attention should be paid to the arrangement and management of test support devices (observation targets, etc.) for testing the function and performance of the EUT.

The curved acceleration test apparatus is a device which generates a centrifugal acceleration by providing a curved portion in the middle of the straight rail and by the radius of rotation of the curved portion. However, curved acceleration test equipment also requires a long rail for accelerating and decelerating and a radius of the accelerating test zone.

Therefore, a centrifugal acceleration testing apparatus is widely used because of a relatively small test space. However, in the centrifugal acceleration testing apparatus, the object to be tested is fixed on the rotating shaft, and the rotating shaft and the object to be tested are rotated (revolving) together, so that the object under test rotates (revolves + rotates) together with the rotation of the rotating shaft. That is, the centrifugal acceleration testing apparatus can not implement a directivity function in the case of a directional device because the test object rotates, that is, rotates at a rotation speed of the center axis on the mounting table, that is, a revolution speed. Therefore, it is impossible to test the directional equipment such as the optical camera and the directional antenna. In other words, the directional DUT should be aimed at a target in one direction. Because the DUT is fixed on the mounting table, the DUT is rotated in the direction of rotation of the rotating shaft and the direction of the DUT is continuously changed do. For example, the electro-optic tracking device (EOTS) must use a gyro sensor and position sensors inside to realize eye stabilization and steering and steering functions. However, the mounting bracket rotates (rotates) And the rotational speed is out of the range, the test can not be performed. Therefore, the durability test mainly focuses on the abbreviated test.

Korean Patent No. 10-0574598 Korean Patent No. 10-1868897

The present invention provides an acceleration testing apparatus that can be installed in a small space.

The present invention provides an acceleration testing apparatus capable of fixing a direction in which a test object is oriented without rotating (rotating).

The present invention provides an acceleration tester capable of repeatedly applying acceleration.

According to an aspect of the present invention, there is provided an acceleration testing apparatus comprising: a rotatable first rotating shaft; A rotating arm provided on the rotating shaft; A test object mounting table provided on one side of the rotating arm and on which a test object is mounted; And a second rotating shaft provided below the DUT mount and rotatable; First and second pulleys provided on the first and second rotary shafts, respectively; And a restraint belt restrained by the first and second pulleys, a safety device provided in a fence shape at a predetermined distance from the rotating arm, and a target disposed outside the safety device through a predetermined region of the safety device And the object to be tested includes directional equipment including an optical camera and a directional camera mounted on a moving object including an aircraft, and the object to be tested is directed to the target by rotation of the first rotary shaft, do.

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And first and second slip rings provided respectively on the first and second rotation shafts and a cable installed in the rotating arm and connected to the first and second slip rings to transmit power and signals to the DUT do.

And a counterweight mounting bracket that is provided on the other side of the rotating arm so as to face the test object mounting bracket and additionally mounted on a counterweight.

The second rotation axis is rotatable in the rotation arm through the rotation arm.

The first and second pulleys have the same effective diameter.

The amount of unwinding of the restraint belt from the first pulley is equal to the amount of winding of the restraint belt of the second pulley.

The first and second pulleys are attached pulleys, and the restraining belt is fastened thereto.

The direction of the test object is also fixed to the rotation of the rotating arm.

The acceleration intensity is adjusted according to the rotation radius and the rotation period of the rotary arm.

And a direction adjusting unit connected to the first pulley to adjust the direction of the test object.

The acceleration test apparatus according to the embodiments of the present invention can prevent rotation of the test subject by providing a second rotation axis on the test subject mount and allowing the test subject mount to keep the current direction even though the first rotation axis rotates . That is, the first and second pulleys are provided on the first and second rotary shafts, respectively, and the first and second pulleys are connected by a restraining belt so that the first rotary shaft rotates, have.

Therefore, the EUT mounted on the acceleration testing apparatus according to the present invention undergoes acceleration and rotation without rotation. In addition, since the orientation of the EUT does not change during the test, the directionality can be maintained, observation performance during acceleration can be maintained, and all states of the apparatus can be observed. Also, the direction of the test object can be adjusted at an arbitrary angle during the test.

Also, the acceleration test apparatus of the present invention can be used to perform an acceleration test such as an electronic optical tracking device (EOTS) or the like, as well as a direction control function and precision aiming and precision detection devices.

Meanwhile, the concept of the present invention can be expanded to provide a structure capable of performing a test of a larger apparatus, and the acceleration intensity can be solved by a combination of a rotation radius and a rotation speed, conditions and regulations necessary for the test.

1 is a schematic diagram of an acceleration testing apparatus according to an embodiment of the present invention;
2 is a schematic diagram of an acceleration test apparatus according to another embodiment of the present invention.
3 and 4 are schematic views for explaining a driving method of an acceleration testing apparatus according to embodiments of the present invention;
5 is a schematic diagram of two-axis acceleration generation of an acceleration test apparatus according to embodiments of the present invention.
6 is a diagram illustrating acceleration strength, rotation radius, and rotation period of an acceleration test apparatus according to embodiments of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of other various forms of implementation, and that these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know completely.

1 is a schematic diagram of an acceleration testing apparatus according to an embodiment of the present invention, which is a schematic view of a centrifugal acceleration testing apparatus.

Referring to FIG. 1, an acceleration testing apparatus according to an embodiment of the present invention includes a rotatable first rotating shaft 100, a rotating arm 100 provided on the first rotating shaft 100 and rotatable together with a first rotating shaft 100 A mounting base 300 and 310 mounted on one end and the other end of the rotary arm 200 to which a unit under test 10 and a counterweight 20 are mounted respectively, A second rotary shaft 400 mounted on one end of the mounting table 300 and connected to the lower side of the mounting table 300 and first and second slip rings 510 and 510 provided on the first and second rotary shafts 100 and 400, A cable 600 installed on the rotary arm 200 and connected between the first and second slip rings 510 and 520 and a cable 600 provided on the first and second rotary shafts 100 and 400, A restraining belt 800 provided to connect the first and second pulleys 710 and 720 and the first and second pulleys 710 and 720 and a driver 900 for rotating the first rotation shaft 100 can do. Here, the first and second pulleys 710 and 720 and the restraining belt 800 may be used as a revolving damper for removing the rotation of the DUT 10. The test object 10 may further include a counterweight 910 provided at the other end of the rotating arm 200 facing the test object mounting stand 300. The target and the test object 10 And a remote measurement instrument capable of measuring the test result of the test apparatus.

The rotary shaft 100 may be provided in a vertical direction above the mounting table 101. Here, the mounting table 101 may be provided on the ground 102. That is, the mounting base 101 may be provided on the flat ground 102 and the rotary shaft 100 may be provided on the mounting base 101 in the vertical direction. The rotary shaft 100 can be rotated in at least one direction by the driving force of the driver 900. [ That is, the rotary shaft 100 may rotate clockwise or counterclockwise. At this time, a bearing may be provided between the rotary shaft 100 and the mounting base 101 so that the rotary shaft 100 can be rotated.

The rotary arm 200 may be provided on the upper side of the rotary shaft 100. The rotary arm 200 may be extended in one direction and in a direction opposite to the other direction. That is, the rotary arms 200 may extend in one direction and the other direction, which are opposite to each other about the rotary shaft 100. The rotating arm 200 can rotate together with the rotating shaft 100. On the other hand, the test object 10 and the counterweight 20 may be provided at the distal end of the rotating arm 200, respectively. That is, the test object 10 may be provided at one end of the rotary arm 200 and the counterweight 20 may be provided at the other end of the rotary arm 200. To this end, a mounting base 300 on which the test object 10 is mounted and a mounting base 310 on which the counterweight 20 is mounted may be provided on one end and the other end of the rotary arm 200, respectively. The mounting base 300 on which the test object 10 is mounted, that is, the mounting base 310 on which the first mounting base and the counterweight 20 are mounted, that is, the second mounting base, (20) can be seated and fixed and mounted. For example, the mounts 300 and 310 may have inwardly concave grooves formed on the upper surface thereof, and the test object 10 and the counterweight 20 may be respectively seated in the grooves. On the other hand, the test subject 10 may include directional equipment such as an optical camera and a directional antenna that can be mounted on a moving object such as an aircraft.

The first mounting table 300 on which the test object 10 is mounted may be provided at one end of the rotary arm 200. At this time, the first mounting base 300 may be rotatable. To this end, the first mounting base 300 may be spaced apart from the rotary arm 200 and spaced above the first mounting base 300, and a second rotary shaft 400 may be provided below the first mounting base 300. That is, the first mounting base 300 is provided on the upper portion of the rotary arm 200, and the second rotary shaft 400 passes through the rotary arm 200 and is disposed on the lower side of the first mounting base 300 So that the first mounting base 300 can rotate independently of the rotary arm 200 in accordance with the rotation of the second rotary shaft 400. The second mounting base 310 on which the counterweight 20 is mounted may be provided at the other end of the rotary arm 200 facing the first mounting base 300. The second mounting base 310 is not rotatable unlike the first mounting base 300. That is, the second mounting base 310 may be fixed on the other end of the rotary arm 200.

The second rotary shaft 400 may be provided to rotate the test object mount 300 on which the test object 10 is placed, that is, the first mount. The second rotary shaft 400 may be provided to penetrate one end of the rotary arm 200. That is, the second rotary shaft 400 may be provided through one end of the rotary arm 200. The second rotary shaft 400 may be rotatable within the rotary arm 200. For this purpose, a bearing or the like may be provided between the rotary arm 200 and the second rotary shaft 400. That is, a bearing or the like is provided between a portion of the second rotation shaft 400 positioned on the inner side of the rotation arm 200 through the rotation arm 200 and the rotation arm 200, 200). The second rotation shaft 400 may be connected to the second pulley 720 connected to the first pulley 710 through the restraining belt 800. The second pulley 720 is provided in a predetermined region of the second rotary shaft 400 located below the rotary arm 200 and the second pulley 720 is disposed in a predetermined position of the first pulley 720 provided on the first rotary shaft 100, 710 and the restraining belt 800. [ At this time, the first pulley 710 is fixed and may not rotate even when the first rotation shaft 100 rotates, so that the second pulley 720 is synchronized with the first pulley 710, The test subject 10 is restrained from rotating and revolves. In other words, since the first pulley 710 is fixed independently of the first rotation shaft 100, the first pulley 710 does not rotate even if the first rotation shaft 100 rotates, Even though the second pulley 720 connected to the first pulley 710 is synchronized with the first pulley 710 and the rotating arm 200 is rotated by the first rotating shaft 100, do.

Slip rings 510 and 520 may be provided to supply power, electrical signals, data, and the like to a rotating object. When the other object, that is, the DUT 10 is operated through the rotating object, the first and second rotary shafts 100 and 400, the object to be tested 10 is tested through the rotating first and second rotary shafts 100 and 400 Electric wires are connected to the water 10 to transmit power or signals. However, the electric wire is connected to the rotating object, and twist occurs at the time of rotation, and slip rings 510 and 520 are installed between the electric wire and the rotating object to prevent this twist. That is, the slip rings 510 and 520 are provided on the first rotary shaft 100 and the second rotary shaft 400, respectively. For example, the slip rings 510 and 520 may be manufactured by inserting a conductor ring and an interlayer insulator on a rotating shaft, constructing a rotating body so as to connect a plurality of electric wires, conducting electric conduction by using a wire brush, The fixing between the fixed body and the rotating body is fixed by the bearing smoothly. Therefore, power and signals can be transmitted to the test object 10 through the first slip ring 510 provided on the first rotating shaft 100 and the second slip ring 520 provided on the second rotating shaft 400.

The cable 600 may be provided to connect the first and second slip rings 510 and 520. That is, the cable 600 may be provided to transmit a power or a signal from the first slip ring 510 to the second slip ring 520. Of course, since the cable 600 connects the first and second slip rings 510 and 520, it can transmit a power or a signal from the second slip ring 520 to the first slip ring 510. The cable 600 transmits power or signals from an external control device to the test object 10 through the first and second slip rings 510 and 520 and the measurement result of the test object 10 is To the external remote measurement apparatus through the first and second slip rings 510 and 520. That is, the cable 600 can be connected to an external control device and a remote measurement device. To this end, the cable 600 may be pulled out onto the mounting table 101 and connected to the control device and the remote measurement device. Meanwhile, the cable 600 may be installed in the rotating arm 200. For example, a cable 600 extending from the first slip ring 510 is installed on the upper side of the rotating arm 200 in the direction of the EUT mount 300 and the side of the distal end of the rotating arm 200, Ring 520 as shown in FIG.

The first and second pulleys 710 and 720 are provided on the first and second rotary shafts 100 and 400 respectively and the restraining belt 800 is disposed between the first and second pulleys 710 and 720 As shown in FIG. The first and second pulleys 710 and 720 and the restraining belt 800 may function together with the second rotation shaft 400 as a rotation stopper for removing the rotation of the test object 10. The first and second pulleys 710 and 720 are provided on the first and second rotary shafts 100 and 400 and may be provided on the same line of the first and second rotary shafts 100 and 400. That is, the first and second pulleys 710 and 720 are arranged so that the restraining belt 800 provided to connect the first and second pulleys 710 and 720 is horizontal from the ground surface 102 or the mounting table 101 May be provided on board. Also, the first and second pulleys 710 and 720 may be provided in the same size. That is, the effective diameters of the first and second pulleys 710 and 720 may be the same, and the turning radius, the number of revolutions, and the like may be the same. The restraining belt 800 may be provided between the first and second pulleys 710 and 720 so as to surround them. That is, the restraining belt 800 may be provided over the first pulley 710 and the second pulley 720. Meanwhile, the first pulley 710 may be fixed independently of the first rotation shaft 100 and may not rotate by the first rotation shaft 100. That is, a bearing is provided between the first pulley 710 and the first rotating shaft 100, and the first pulley 710 can be fixed to the bracket extending from the mounting base 102, for example. Therefore, even if the first rotary shaft 100 rotates inside the first pulley 710, the first pulley 710 can be fixed without rotating.

The first and second pulleys 710 and 720 are provided on the first and second rotating shafts 100 and 400 and the restraining belt 800 is provided between the first and second pulleys 710 and 720 so that even when the first rotating shaft 100 rotates, The test object 10 may not rotate by canceling the rotation, i.e., the rotation, of the water 10. If the effective diameters of the first and second pulleys 710 and 720 are the same, the first mounting base 300 does not rotate in spite of the rotation of the rotating arm 200, so that the initial orientation can be maintained. That is, the amount of winding the restraint belt 800 to the first pulley 710 and the amount of the restraining belt 800 to be unwound to the second pulley 720 are the same, The test object 10 does not rotate, and the direction in which the test object 10 is initially oriented can be maintained. On the other hand, when the first and second pulleys 710 and 720 and the restraining belt 800 are in contact with each other smoothly, the restraining belt 800 may be slipped or an error may occur due to abrasion of the restraining belt 800 . Therefore, the first and second pulleys 710 and 720 can be driven without slip by using the pulley and by fastening the restraining belt 800 to the pulley. That is, the belt 800 of the first and second pulleys 710 and 720 is in contact with and has a plurality of protrusions provided at predetermined intervals on the inner side thereof. The accommodating portion is provided on the inner side of the belt 800, And can be driven without slip by fastening. In addition, by using the attaching pulley, it is possible to eliminate an error caused by abrasion of the pulley or the belt.

The driver 900 may be connected to the first rotary shaft 100 to rotate the first rotary shaft 100. For example, the actuator 900 is spaced apart from the first rotary shaft 100 and connected to the first rotary shaft 900 by a belt or the like to transmit the driving force of the actuator 900 through the belt to the first rotary shaft 100, . The driver 900 may be a rotary motor or the like.

On the other hand, since the counterweight 20 is provided in the direction opposite to the test object 10, the occurrence of vibration during the test can be reduced. Incidentally, an accident that the counterweight 20 is released during the acceleration test may occur, and the counterweight 20 may fly and cause damage to the periphery. In order to prevent this, a stabilizer 910 may be provided at a predetermined distance from the rotary arm 200. The safety device 910 may be spaced apart from the rotary arm 200 and may be higher than the height at which the counterweight 20 is seated. That is, the safety device 910 may be provided in the form of a fence surrounding the acceleration testing device and higher than the seating height of the counterweight 20.

Further, although not shown, it may further include a target and a remote measurement device, an adjustment device, and an observation device. The target may be provided on one side of the present invention apart from the fast acceleration testing device. The target may be provided in a direction in which the test object 10 is oriented so that the test object 10 can be photographed or observed while performing an acceleration test. Such a target may be provided outside the safety device 910 through a predetermined area of the safety device 910. [ That is, a predetermined area of the safety device 910 may be removed to a predetermined size in a region corresponding to the height of the test object 10, and a target may be provided at a height of the test object 10 in an area outside the safety device 910. The remote measuring device, the adjusting device and the observation device may be provided for measuring the test results of the test object 10, That is, power and signals are applied to the test object 10 through the first and second slip rings 510 and 520 and the cable 600, and the signal generated from the test object 10 is received The test results of the test object 10 can be measured.

As described above, the acceleration testing apparatus according to an embodiment of the present invention includes the first rotating shaft 400 provided on the first mounting table 300 on which the test subject 10 is mounted, It is possible to prevent rotation of the test object 10 by allowing the second rotation axis 400 to keep its current position when rotating. That is, the first and second pulleys 710 and 720 are provided on the first rotation axis 100 and the second rotation axis 400 and the first and second pulleys 710 and 720 are connected to each other by the restraining belt 800 The second rotary shaft 400 revolves and does not rotate when the first rotary shaft 100 rotates, so that the direction of the test object 10 can be maintained in the initial direction. At this time, the amount of winding of the restraining belt 800 on the first pulley 710 and the amount of unwinding from the second pulley 720 are the same, and the amount of unwinding from the first pulley 710 and the amount of unwinding from the second pulley 720 So that the direction in which the DUT 10 is oriented can be maintained even if the first rotating shaft 100 rotates. Therefore, even if the rotating arm 200 is rotated, the direction of the test object 10 is maintained, and the directional equipment such as an optical camera and a directional antenna can be tested.

FIG. 2 is a schematic diagram of an acceleration testing apparatus according to another embodiment of the present invention, which is a schematic diagram of an acceleration testing apparatus further including a direction adjusting unit 1000 for adjusting a direction of a test object 10. In other words, the direction of the test object 10 can be finely adjusted by adjusting the rotation removing portion including the first and second pulleys 710 and 720 and the restraining belt 800. By using the direction adjusting portion 1000 The rotation removing portion can be adjusted. The direction adjusting unit 1000 includes a second driving unit 1100 provided separately from the driving unit 900, a bearing 1200 provided between the first pulley 710 and the first driving shaft 100, a first pulley 710 And a gear 1300 provided between the first driving part 1100 and the second driving part 1100. The direction adjusting unit 1000 may be mounted on the first pulley 710 to finely adjust the direction of the test object 10. That is, the driving force of the second driving part 1100 is transmitted to the first pulley 710 through the gear 1300, so that the rotational angle of the first pulley 710 is partially adjusted, The first pulley 800 and the second pulley 720 to fine tune the direction of the test object 10. That is, the steering direction of the test object 10 can be adjusted by a predetermined angle to finely adjust the steering direction. Here, the fine adjustment angle of the steering direction of the test object 10 may be, for example, 1 to 5 degrees. When the direction adjusting unit 1000 is used, the first rotating shaft 100 rotates to adjust the direction of the DUT 10 during the acceleration test of the DUT 10.

As described above, the acceleration test apparatus according to the present invention implements the function of removing the rotation (rotation) of the test object mounting table. The acceleration test method of the test object using the acceleration test apparatus of the present invention will be described as follows.

The test object 10 is mounted on the first mounting table 300 at one end of the rotary arm 200 and the second mounting table 310 at the other end of the rotary arm 200 in the opposite direction is mounted on the first mounting table 300, (20). At this time, the test object 10 may be provided so as to face the target. That is, a target may be provided in a region spaced apart from the acceleration test apparatus, and the DUT 10 may be mounted such that an observer such as a camera lens of the DUT 10 faces the target. Then, the driving unit 900 is driven to rotate the rotating arm 200 in one direction. That is, the rotating force of the driving unit 900 is transmitted to the first rotating shaft 100, and the rotating arm 200 is rotated by the rotation of the first rotating shaft 100. At this time, since the counterweight 20 is provided at the other end of the rotating arm 200 facing the test object 10, the occurrence of vibration during the test can be reduced.

The second mounting table 300 is provided at the upper side of the second rotary shaft 400 and can rotate and the rotation of the rotary arm 200 is canceled by the first and second pulleys 710 and 720 and the restraining belt 800 So that the magnetic axis rotation (i.e., rotation) can be removed. That is, if the two pulleys 710 and 720 have the same effective diameter, the first mounting table 300 does not rotate (rotate) despite the rotation of the rotating arm 200, so that the initial orientation direction of the test object 10 is maintained . Fig. 3 is a schematic view for explaining the direction of the object to be tested according to the driving of the first and second pulleys 710 and 720 and the restraining belt 800. Fig. A restraining belt 800 is provided between the first pulley 710 and the second pulley 720 as shown in FIG. 3 and the test subject 10 is oriented in the direction A in the initial state, The second pulley 720 moves to the B position when the first pulley 710 rotates counterclockwise. At this time, the amount a of the restraint belt 800 from the first pulley 710 is equal to the amount a 'of the restraint belt 800 wound around the second pulley 720, and the amount of the first pulley 710 And the amount b 'of the restraint belt 800 released from the second pulley 720 are equal to each other so that the test object 10 does not rotate but moves in the direction In the A direction. 4, the test object 10 on the rotating arm 200 is rotated by the rotation of the rotating arm 200 even if the first rotating shaft 100 rotates 360 degrees, ) Can be maintained as it is. At this time, it is possible to drive without slip by using the attaching pulley and the belt. That is, if the number of teeth of two pulleys is the same, there is no direction change.

The first and second slip rings 510 and 520 are provided on the first and second rotary shafts 100 and 400 and the cable 600 is connected to the first mounting table 300, And the operation result of the test object 10 can be output.

The direction adjusting unit 1000 is mounted on the first pulley 710 to adjust the direction of the test object 10 and the direction adjusting unit 1000 is used to adjust the direction of the test object 10 during the acceleration test. Direction can be controlled at an arbitrary angle.

Using the acceleration test apparatus according to the present invention, the test object alternately receives acceleration of two axes as shown in FIG. Therefore, in order to recognize an alternating acceleration as acceleration without not defining it as a vibration or an impact, the following conditions should be satisfied. That is, if the rotation speed of the acceleration test apparatus is Fs (CPS or Hz), the rigidity of the structure and the natural frequency Fn thereof are Fn> 10 × Fs, and BW (㎐) X Fs. In general, structural, functional stiffness, natural frequency, and BW of equipment installed in aircraft, automobile, and ship are more than several tens of Hz, so it is reasonable to test it satisfying these conditions.

FIG. 6 illustrates the acceleration intensity, rotation radius, and rotation period of the test apparatus required for the acceleration test apparatus of the present invention. That is, the horizontal axis represents the rotation radius (m), and the vertical axis represents the rotation speed per second (CPS) as the rotation speed, indicating the acceleration intensity between the rotation radius and the rotation speed. For example, if the turning radius is 7m and the rotational speed is 0.6CPS, the acceleration intensity may be 10.1. Therefore, the desired acceleration strength can be obtained by adjusting the rotation radius and the rotation speed. For example, if the rotating radius (R) is adjusted in a test apparatus with a rotational speed of 0.5 CPS, a desired acceleration can be obtained and the rotational speed is constant. If you want to reduce the turning radius of the test equipment, you can use it within 7m if the rotation speed (Fs) is 0.6CPS.

The present invention is not limited to the above-described embodiments, but may be embodied in various forms. In other words, the above-described embodiments are provided so that the disclosure of the present invention is complete, and those skilled in the art will fully understand the scope of the invention, and the scope of the present invention should be understood by the appended claims . Further, embodiments of the present invention can be combined with one another.

100: first rotating shaft 200: rotating arm
300: mounting base 400: second rotating shaft
510, 520: first and second slip rings
600: cables 710, 720: first and second pulleys
800: restraint belt 900: actuator

Claims (11)

A rotatable first rotation shaft;
A rotating arm provided on the rotating shaft;
A test object mounting table provided on one side of the rotating arm and on which a test object is mounted; And
A second rotating shaft provided below the DUT mount and rotatable;
First and second pulleys provided on the first and second rotary shafts, respectively; And
A restraining belt constrained to said first and second pulleys,
A safety device provided at a predetermined distance from the rotating arm and provided in the form of a fence; and a target disposed outside the safety device through a predetermined area of the safety device,
The object to be tested includes an optical camera mounted on a moving body including an aircraft, a directional equipment including a directional camera,
Wherein the object to be tested is kept in the directing direction so as to face the target even by rotation of the first rotating shaft.
delete [2] The apparatus according to claim 1, further comprising first and second slip rings provided respectively on the first and second rotation shafts,
And a cable installed in the rotating arm and connected to the first and second slip rings to transmit power and signals to the EUT. The acceleration test apparatus according to claim 1, further comprising a counterweight mount mounted on the other side of the rotating arm, opposite to the test object mounting table, and further mounted on a counterweight.
The apparatus according to claim 3 or 4, wherein the second rotation axis is rotatable in the rotation arm through the rotation arm.
The acceleration test apparatus according to claim 5, wherein the first and second pulleys have the same effective diameter.
7. The acceleration test apparatus according to claim 6, wherein the amount of unwinding of the restraint belt from the first pulley is equal to the amount of winding of the restraint belt of the second pulley.
The apparatus according to claim 6, wherein the first and second pulleys are attached pulleys, and the restraining belt is fastened thereto.
The apparatus according to claim 5, wherein the direction of orientation of the test subject is also fixed to the rotation of the rotating arm.
The apparatus according to claim 5, wherein the acceleration intensity is adjusted according to a rotation radius and a rotation period of the rotary arm.
The apparatus of claim 5, further comprising a direction adjusting unit coupled to the first pulley to adjust a direction of the test object.

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