JP2008102036A - Triaxial vibration testing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein, when a vibration device using a conventional magnetostrictor is applied to a testing device, vibration can be applied only to one-axis direction in three-axis directions, and thereby it is unsuitable to be used as a vibration testing device. <P>SOLUTION: In this triaxial vibration testing device, a vibrator of a Z-axis magnetostrictive actuator 5 is connected to the bottom surface of a material stand 1 through a slide guide 8 uninfluenced by vibration having a vibration direction different from that of the actuator, and vibrators of an X-axis magnetostrictive actuator 3 and a Y-axis magnetostrictive actuator 4 are connected to each orthogonal side face of the material stand in the same way, to thereby perform excitation with the material stand uninfluenced by vibration from another actuator. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a three-axis vibration test apparatus for testing the durability and the like of a test object by using a magnetostrictive element as a drive source and vibrating the test object in three-axis directions.

  As a conventional vibration device using a magnetostrictive element, for example, there is an invention disclosed in JP-A-2005-176121. The present invention includes a magnetostrictive rod having a magnetostrictive member, one end of which is a fixed end, a drive coil disposed so as to surround the outer periphery of the magnetostrictive rod, and applying debris in the axial direction of the magnetostrictive rod; Disclosed is a magnetostrictive vibration device using a magnetostrictive displacement direction conversion device that is disposed on the free end side of a magnetostrictive rod and has a displacement direction conversion mechanism for converting a displacement in the axial direction of the magnetostrictive rod into a displacement in a direction different from the axial direction. Has been.

In this magnetostrictive vibration device, the cone of the speaker is vibrated, and the test object placed on the data base as in the vibration test device of the present invention is vibrated in three axial directions and is durable. This is not a test for property and the like, but the cone is vibrated in one axial direction.
JP-A-2005-176121

  By the way, even if the vibration device in the above-described conventional invention is applied to a test device, it can only give vibrations in one of the three axial directions, so that it is not suitable for use as a vibration test device. It was.

  The present invention is intended to solve the above-described problems. The object of the present invention is to carry out a test in which a material table on which a test object is placed is subjected to vibration in three axial directions, for example, for a mobile phone. An object of the present invention is to provide a three-axis vibration test apparatus that can test durability and the like by testing actual usage conditions of such portable products.

  The three-axis vibration test apparatus according to the present invention achieves the above-described object, and the means of claim 1 includes a Z-axis magnetostrictive actuator vibrator on the bottom surface of the material table and an X-axis on the orthogonal side surface of the material table. The magnetostrictive actuator and the Y-axis magnetostrictive actuator are connected via a slide guide that is not affected by vibrations different from the vibration direction of each actuator. It is characterized by being vibrated without receiving.

  According to a second aspect of the present invention, in the first aspect, the slide guide absorbs vibration in one axial direction with respect to the fixed member fixed to the vibrator by the first moving member that slides through the ball. The vibration perpendicular to the one axis direction is absorbed by the second moving member that slides through the ball with respect to the first moving member, and the second moving member is fixed to the data base. It is characterized by.

  According to a third aspect of the present invention, in the first aspect, the triaxial magnetostrictive actuator is directly cooled by cooling water or cooled by cooling the inside of a storage box in which the triaxial magnetostrictive actuator is stored. It is characterized by that.

  In the present invention, a magnetostrictive actuator that applies vibration to the data base in the X, Y, and Z axis directions is connected via a slide guide that is not affected by vibration different from the vibration direction of each actuator. Since each magnetostrictive actuator is not affected by vibration caused by other magnetostrictive actuators, it is possible to accurately apply vibrations in three axial directions to the DUT placed on the data base.

  In addition, the first moving member that slides the uniaxial vibration with respect to the fixing member fixed to the vibrator by the first moving member that slides through the ball absorbs the vibration orthogonal to the first axial direction. Since the second moving member that slides with respect to the moving member is absorbed by the ball, the frictional resistance of the connecting portion between each magnetostrictive actuator and the data base is small. Therefore, each magnetostrictive actuator is the other magnetostrictive actuator. High-accuracy vibration test can be performed without being affected by.

  In addition, by directly cooling each magnetostrictive actuator or cooling the inside of the storage box in which the magnetostrictive actuator is stored, the change in vibration due to the heat generated by each magnetostrictive actuator is prevented, and vibration with a certain characteristic is always generated. It has the effect that it can be generated.

  In the present invention, magnetostrictive actuators that apply vibrations in the X, Y, and Z axis directions to the data base are connected via slide guides that are not affected by vibrations different from the vibration directions of the respective actuators.

Hereinafter, an embodiment of the triaxial vibration test apparatus of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a storage box, and a heat exchanger 11 and a cooling means 12 including two Peltier elements and an air cooling fan for cooling each Peltier element are provided on both sides of the heat exchanger. Has been. The other ends of three water inlet tubes (not shown), one end of which is connected to the water outlet of the heat exchanger 11, are input to cooling cylinders 3 ′ to 5 ′ that cover the outer periphery of triaxial magnetostrictive actuators 3 to 5 described later. The other end of a water discharge tube (not shown) connected to the outlet and connected to the output port of the cooling cylinders 3 'to 5' is connected to the heat exchanger 11 via a circulation pump (not shown). .

  With this configuration, the cooling water in the heat exchanger 11 cooled by driving the circulation pump is supplied to the cooling cylinders 3 'to 5' of the magnetostrictive actuators 3 to 5, and the magnetostrictive actuators 3 to 3 are supplied. The water having cooled 5 is cooled to the heat exchanger 11 through a pump, and is again supplied to the cooling cylinders 3 'to 5' of the magnetostrictive actuators 3 to 5, thereby constantly cooling the magnetostrictive actuators 3 to 5. Thereby, the magnetostrictive actuators 3 to 5 vibrate faithfully with respect to the input signal.

  In the above-described embodiment, the heat exchanger 11 is cooled by the Peltier element, and the cooling water is circulated from the heat exchanger 11 to the cooling cylinders 3 'to 5' of the magnetostrictive actuators 3 to 5 to directly connect the magnetostrictive actuators. Although the case of cooling 3 to 5 has been described, the air inside the storage box 1 may be cooled by a cooling means using a Peltier element or by a means such as taking in outside air by a fan.

  In the storage box 1, the material table 2 is arranged in a state exposed from a window formed on the upper surface of the storage box 1, and the material table 2 is arranged in three axial directions (X, Y, Z directions). An X-axis magnetostrictive actuator 3, a Y-axis magnetostrictive actuator 4, and a Z-axis magnetostrictive actuator 5, which are magnetostrictive elements for applying vibration, are accommodated. The material table 2 and the triaxial magnetostrictive actuators 3 to 5 constitute a substantial vibration test apparatus A. Reference numeral 6 denotes a cover that covers the upper surface of the storage box 1 to prevent noise generated when the triaxial magnetostrictive actuators 3 to 5 are driven from leaking to the outside.

Next, details of the vibration test apparatus A will be described with reference to FIGS. In each figure, the cooling cylinders 3 'to 5' are not shown in order to simplify the drawings.
An X-axis magnetostrictive actuator 3 and a Y-axis magnetostrictive actuator 4 are attached via fixtures 31 and 41 to two orthogonal side walls 71 of the actuator mounting member 7 fixed to the back surface of the top plate 13 in the storage box 1 described above. The Z-axis magnetostrictive actuator 5 is attached to the bottom plate 72 via a fixture 51. The triaxial magnetostrictive actuators 3 to 5 are attached to the attachments 31 to 51 so that the vibrators 32 to 52 protrude from the inside of the attachment member 7.

  The vibrators 32 to 52 of the triaxial magnetostrictive actuators 3 to 5 attached to the actuator attachment member 7 in the triaxial direction are vibrations of the X axis magnetostrictive actuator 3 on the orthogonal side wall surfaces of the material table 2 formed in a prismatic shape. The child 32 and the vibrator 42 of the Y-axis magnetostrictive actuator 4 and the vibrator 52 of the Z-axis magnetostrictive actuator 5 on the lower surface thereof are passed through a biaxial ball type slide guide (hereinafter simply referred to as a slide guide) 8 described in detail later. It is connected.

  A large number of screw holes 21 for fixing a test object such as a mobile phone are formed on the upper surface of the data base 2. Reference numerals 33 and 53 of the triaxial magnetostrictive actuators 3 to 5 are connection terminal portions connected to lead wires (not shown) for applying drive signals to the actuators 3 to 5. However, the connection terminal portion of the Y-axis magnetostrictive actuator 4 is not shown from the angle of the drawing.

  Next, details of the slide guide 8 will be described with reference to FIG. 5 illustrates the case where the X-axis magnetostrictive actuator 3 and the material table 2 are connected, but the Y-axis magnetostrictive actuator 4 and the slide guide 7 that connects the Z-axis magnetostrictive actuator 5 and the material table 2 have the same structure. Description is omitted.

  The slide guide 8 includes a Z-axis fixing member 81 screwed to the vibrator 32, and a Z-axis moving member supported so as to be slidable in the Z-axis direction with respect to the Z-axis fixing member 81 via a large number of balls 82. 83, a Y-axis fixing member 85 attached to the Z-axis moving member 83 via a fixing member 84, and slidable in the Y-axis direction via a large number of balls 86 relative to the Y-axis fixing member 85 And a Y-axis moving member 87 screwed to the side surface of the material table 2.

  The ball 82 is accommodated so as not to slip out into the grooves 81a and 83a formed in the Z-axis fixing member 81 and the Z-axis moving member 83, and the ball 86 is similarly arranged in the Y-axis fixing member 85 and the Y-axis moving member. 87 is accommodated in the grooves 86a, 87a so as not to come out.

  When the Z-axis magnetostrictive actuator 5 is driven and the document table 2 vibrates in the vertical direction, the slide guide 8 configured as described above is configured such that the Z-axis moving member 83 via the ball 82 with respect to the Z-axis fixing member 81. Therefore, the X-axis magnetostrictive actuator 3 is not affected by vibration in the Z-axis direction. Similarly, the X-axis magnetostrictive actuator 3 is not affected by the movement of the Y-axis moving member 87 with respect to the vibration in the Y-axis direction.

  On the other hand, when the vibrator 32 of the X-axis magnetostrictive actuator 3 vibrates, the side surface of the document table 2 passes through the Z-axis fixing member 81, the Z-axis moving member 83, the fixing member 84, the Y-axis fixing member 85, and the Y-axis moving member 87. Since the vibration is applied to the material table 2, the data base 2 can be vibrated in the X-axis direction regardless of the vibrations in the Z-axis direction and the Y-axis direction.

  Hereinafter, similarly, the Y-axis magnetostrictive actuator 4 is not affected by vibrations from the X-axis magnetostrictive actuator 3 and the Z-axis magnetostrictive actuator 5, and the Y-axis magnetostrictive actuator 4 and It is not affected by the vibration from the X-axis magnetostrictive actuator 3, so the X-axis, Y-axis, and Z-axis vibrations on the material table 2 are accurately given without being affected by other magnetostrictive actuators. It becomes possible to do.

  Then, only the vibrations from the Y-axis magnetostrictive actuator 4 and the Z-axis magnetostrictive actuator 5 are applied to the material table 2, and therefore the material table 2 vibrates according to the acceleration applied in the X, Y, and Z-axis directions. Therefore, the vibration of the same condition is given to the DUT that is placed and fixed on the document table 2, for example, a mobile phone, and the durability (mechanical damage or electrical condition) due to this vibration is given. ) Can be tested.

  In the above-described embodiment, the load of the sample table 2 and the DUT is applied to the Z-axis magnetostrictive actuator 5 with respect to the other X-axis magnetostrictive actuator 3 and Y-axis magnetostrictive actuator 4, but the X- and Y-axis magnetostrictive actuators 3 and 4 The influence of the load can be canceled by applying a greater vibration force (acceleration) than the load.

It is a perspective view which shows the outline of the triaxial vibration test apparatus of this invention. It is a perspective view of the state which attached the triaxial magnetostrictive actuator with respect to a data base. It is the perspective view seen from the position rotated 90 degree | times same as the above. It is a cross-sectional view of FIG. It is sectional drawing for demonstrating a slide guide.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage box 2 Reference stand 3 X-axis magnetostrictive actuator 4 Y-axis magnetostrictive actuator 5 Z-axis magnetostrictive actuator 6 Cover 7 Mounting member 8 Slide guide 81,85 Fixed member 83,87 Moving member 82,86 Ball

Claims (3)

The Z-axis magnetostrictive actuator vibrator is on the bottom of the data base, and the X-axis and Y-axis magnetostrictive actuator vibrators are affected by vibrations that are different from the vibration directions of the actuators. A three-axis vibration test apparatus characterized in that it is connected via a slide guide without any vibration and is vibrated without being affected by vibrations from other actuators on the data base. The slide guide absorbs vibrations in one axial direction with respect to a fixed member fixed to the vibrator by a first moving member that slides through a ball, and vibrates perpendicular to the one axial direction. 2. The three-axis vibration test apparatus according to claim 1, wherein the second moving member that slides with respect to the moving member is absorbed by the second moving member, and the second moving member is fixed to the data base. . The triaxial magnetostrictive actuator according to claim 1, wherein the triaxial magnetostrictive actuator is cooled directly by cooling water or by cooling the inside of a storage box in which the triaxial magnetostrictive actuator is accommodated. Vibration test equipment.

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