JP2011185830A - Electrostatic testing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrostatic testing device that increases the working efficiency of an electrostatic test and improves the inspection accuracy. <P>SOLUTION: A plurality of grooves 24 for mounting a harness are arranged in a mounting member 8, and a Y-axis linear guide 13 reciprocates a discharge gun 7 in the Y direction in which the plurality of grooves 24 are arranged. A personal computer 4 controls a stepping motor driver 11 so that the discharge gun 7 stops for each groove 24, discharges static electricity from the discharge gun 7, and applies the static electricity to the harness mounted in the grooves 24. Thus, the static electricity can be continuously applied to each wire of the harness mounted in the plurality of grooves 24 by automatic control, so that the working efficiency of an electrostatic test can be increased. By abolishing a manual electrostatic test and controlling discharge of the discharge gun 7 with the personal computer 4, the inspection accuracy can be improved. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electrostatic test apparatus used for an electrostatic test of an electronic control unit (hereinafter referred to as “ECU”).

2. Description of the Related Art Conventionally, a static electricity test is known in which static electricity is applied to a harness connected to an ECU in an activated state, thereby confirming the operation and resistance of the ECU.
The free arm described in Patent Document 1 holds the discharge gun that applies static electricity to the object to be inspected at an arbitrary position, thereby reducing the work burden of holding the discharge gun at a fixed position during an electrostatic test. Yes.
Moreover, the electrostatic test apparatus described in Non-Patent Document 1 moves the discharge gun to the inspection object side at a predetermined speed and applies static electricity to the inspection object.

JP-A-6-46388

Automatic electrostatic application system, Internet <URL: http://www.noiseken.co.jp/uploads/photos0/103.pdf>

However, in Patent Document 1, there is a concern that the electrostatic test has to be performed manually, and the working efficiency is deteriorated and the inspection accuracy is lowered.
Further, in Non-Patent Document 1, when performing an electrostatic test on a plurality of objects to be inspected, there is a concern that the installation of the objects to be inspected takes man-hours and the work efficiency deteriorates. Further, when exchanging a plurality of objects to be inspected, if the position where the objects to be inspected are shifted, the inspection accuracy may be lowered.
The present invention has been made in view of the above problems, and an object of the present invention is to provide an electrostatic test apparatus capable of improving the work efficiency of the electrostatic test and improving the inspection accuracy.

  According to the first aspect of the present invention, the mounting member is provided with a plurality of grooves for mounting the object to be inspected. The first driving means supports the discharge gun at a position facing the mounting member, and can reciprocate the discharge gun in the direction in which the plurality of grooves are arranged. The control means controls the driving means so that the discharge gun stops for each groove, and applies static electricity from the discharge gun to the object to be inspected placed in the groove. Thereby, since static electricity can be continuously applied to each object to be inspected placed in a plurality of grooves by automatic control, the work efficiency of the static electricity test can be increased. In addition, since the manual electrostatic test is abolished and the movement and discharge of the discharge gun are controlled by the control means, the inspection accuracy of the electrostatic test can be improved.

  According to the second aspect of the present invention, the electrostatic test apparatus includes the support body that supports the first driving means. The mounting member and the support are attached at a position where the discharge gun faces the groove of the mounting member. By inputting the groove interval, the control means can control the driving means so that the discharge gun is surely stopped for each groove without providing a sensor for recognizing the position of the object to be inspected. Accordingly, the inspection accuracy of the electrostatic test can be improved and the manufacturing cost of the electrostatic test apparatus can be reduced.

  According to the invention which concerns on Claim 3, a mounting member and a positioning part are attached so that the reference position of the groove | channel of a mounting member and the reference position of the positioning part provided in the support body may correspond. As a result, the control means can accurately control the drive means so that the discharge gun stops for each groove, and the inspection accuracy is improved. Moreover, positioning with a mounting member and a positioning part can be performed easily.

  According to a fourth aspect of the present invention, the electrostatic test apparatus includes the second drive unit that reciprocates the discharge gun in a direction in which the discharge gun faces the groove. Thereby, static electricity can be reliably applied to a to-be-inspected object by making a discharge gun and to-be-inspected object approach or contact. Therefore, the work efficiency of the electrostatic test can be increased and the inspection accuracy can be improved.

  According to the invention which concerns on Claim 5, the depth of the some groove | channel provided in the mounting member is each formed corresponding to the thickness of the to-be-inspected object mounted in a groove | channel. Thereby, the distance between the discharge gun side surface of the object to be inspected and the discharge gun is constant. For this reason, the driving means can reliably apply the static electricity to all the objects to be inspected by causing the discharge gun to approach or contact the objects to be inspected placed in the plurality of grooves. Therefore, the inspection accuracy of the electrostatic test can be improved.

In the invention which concerns on Claim 6, the specific structure of a 1st drive means and a 2nd drive means is illustrated.
The first drive means is driven by the first motor driven based on the control signal output from the control means, the first guide member fixed to the support, the first guide member, and the drive amount of the first motor. And a first movable member that reciprocates in the direction in which the plurality of grooves are arranged.
The second driving means is driven by a second motor driven based on a control signal output from the control means, a second guide member fixed to the first movable member, and guided by the second guide member. The discharge gun includes a second movable member that reciprocates in a direction toward the groove in accordance with the driving amount.

1 is a side view of an electrostatic test apparatus according to a first embodiment of the present invention. 1 is a plan view of an electrostatic test apparatus according to a first embodiment of the present invention. 1 is a front view of an electrostatic test apparatus according to a first embodiment of the present invention. 1 is a block diagram of an electrostatic test apparatus according to a first embodiment of the present invention. It is a top view which shows the state which performs an electrostatic test using the electrostatic test apparatus by 1st Embodiment of this invention. It is a principal part enlarged view which shows operation | movement of the electrostatic test apparatus by 1st Embodiment of this invention. It is a principal part enlarged view of the electrostatic test apparatus by 2nd Embodiment of this invention. It is a top view which shows the state which performs an electrostatic test using the electrostatic test apparatus of the comparative example of this invention.

Hereinafter, a plurality of embodiments according to the present invention will be described with reference to the drawings. In this specification, a direction from left to right in FIG. 1 is referred to as a Y direction, a direction from top to bottom is referred to as a Z direction, and a direction perpendicular to the paper and from the front to the back is referred to as an X direction.
(First embodiment)
An electrostatic test apparatus according to a first embodiment of the present invention is shown in FIGS. The electrostatic test apparatus 1 is used for an electrostatic test in which static electricity is applied to a harness 3 connected to an ECU 2 that is in an activated state, thereby confirming the operation and resistance of the ECU 2.

As shown in FIGS. 1 to 3, the electrostatic test apparatus 1 includes a discharge gun 7, a static generator 5, a stepping motor driver 11, a Y-axis linear guide 13, a Z-axis linear guide 15, a mounting member 8, and the like. These are attached to the support 17 of the electrostatic test apparatus 1.
The support body 17 is a gantry framed in a substantially rectangular parallelepiped shape. Four wheels 18 are attached to the support 17. Each wheel 18 can change direction. Thereby, the support body 17 can move freely in the XY plane. In addition, the support 17 is provided with four legs 19 that can be expanded and contracted. The movement of the support body 17 is restricted by extending the foot 19 in the Z direction from the wheel 18.

The static electricity generator 5 outputs the static electricity generated in the machine to the discharge gun 7.
The discharge gun 7 is fixed to a discharge gun fixing jig 16. The discharge gun 7 discharges the static electricity transmitted from the static electricity generator 5 from the discharge part 71 at the end in the Z direction.

The stepping motor driver 11 generates pulse power and outputs it to a Y-axis stepping motor 12 as a first motor and a Z-axis stepping motor 14 as a second motor.
The Y-axis stepping motor 12 is driven in synchronization with the pulse power transmitted from the stepping motor driver 11 to operate the Y-axis linear guide 13.
The Y-axis linear guide 13 includes a first guide member 131 attached to the support 17 and a first movable member 132 that can reciprocate the first guide member 131 in the Y direction. The first movable member 132 reciprocates in parallel with the first guide member 131 according to the drive amount of the Y-axis stepping motor 12.

The Z-axis stepping motor 14 is driven in synchronization with the pulse power transmitted from the stepping motor driver 11 to operate the Z-axis linear guide 15.
The Z-axis linear guide 15 includes a second guide member 151 attached to one end of the first movable member 132, a second movable member 152 that can reciprocate the second guide member 151 in the Z direction, and the like. . The second movable member 152 reciprocates in parallel with the second guide member 151 according to the drive amount of the Z-axis stepping motor 14.
A discharge gun fixing jig 16 for fixing the discharge gun 7 is provided on the second movable member 152. For this reason, the discharge gun 7 reciprocates in the Y direction and the Z direction.

  The mounting member 8 is formed in a rectangular parallelepiped shape from an insulator such as a resin. A plurality of grooves 24 extending in the X direction are provided on the outer wall of the mounting member 8. The groove 24 is provided on the outer wall of the mounting member 8 so as to be parallel to the Y direction. In the groove 24, wirings constituting the harness 3 of the ECU 2 as a non-inspection body are placed.

The mounting member 8 is attached to a positioning portion 20 provided on the support body 17. The positioning part 20 has an insertion part 21 extending in the Y direction. The mounting member 8 abuts against the inner walls 22 and 221 of the insertion portion 21 and is fixed to the positioning portion 20 with bolts 23.
Thereby, the reference position S1 of the positioning part 20 and the reference position S1 of the mounting member 8 coincide. Further, the reference position S2 of the positioning unit 20 and the reference position S2 of the placement member 8 coincide. At this time, the installation member 8 is installed so that the discharge part 71 of the discharge gun 7 faces the groove 24 on the positioning part 20 side of the mounting member 8. That is, the installation member 8 is accurately positioned with respect to the Y-axis linear guide 13 and the Z-axis linear guide 15 that support and move the discharge gun 7.

As shown in FIG. 4, a personal computer (hereinafter referred to as “personal computer”) 4 as a control means centrally controls each part of the electrostatic inspection apparatus 1 such as the stepping motor driver 11 and the electrostatic generator 5.
In the personal computer 4, the distance between each groove 24 of the placement member 8 and the reference position S <b> 1 is input in advance. In addition, the distance between the discharge portion 71 of the discharge gun 7 and the reference position S2 is input to the personal computer 4 in advance. Therefore, the personal computer 4 transmits a control signal to the stepping motor driver 11 to cause the stepping motor driver 11 to generate pulse power corresponding to the driving amounts of the Y-axis stepping motor 12 and the Z-axis stepping motor 14.
The Y-axis stepping motor 12 and the Z-axis stepping motor 14 are driven according to the pulse power output from the stepping motor driver 11 to each motor. The Y-axis linear guide 13 reciprocates the discharge gun 7 in the direction in which the plurality of grooves 24 are arranged (Y direction) according to the drive amount of the Y-axis stepping motor 12. The Z-axis linear guide 15 reciprocates the discharge gun 7 in a direction (Z direction) in which the discharge gun 7 faces the groove 24 according to the drive amount of the Z-axis stepping motor 14.
On the other hand, the static electricity generator 5 outputs the static electricity generated in the machine to the discharge gun 7 based on the control signal transmitted from the personal computer 4. As a result, the discharge gun 7 discharges static electricity to each wiring constituting the harness 3 placed in the groove 24 of the placement member 8.

Next, a method of electrostatic testing using the electrostatic testing apparatus 1 will be described with reference to FIGS.
The electrostatic test is performed on a test table 25 formed from a copper plate. This is because the static electricity test is performed under the condition of having a fuselage ground, as in the case where the ECU 2 is installed in the vehicle.
First, after moving the electrostatic test apparatus 1 to a predetermined discharge position A, the four legs 19 are extended, and the electrostatic test apparatus 1 is fixed to the test table 25. At this time, the X-direction of the Y-axis linear guide 13 can be adjusted by the handle 28 provided on the support 17.
Next, each wiring 30 which comprises the harness 3 is mounted in each groove | channel 24 of the mounting member 8, and this wiring 30 is fixed to the groove | channel 24 with a tape.
For example, the ECU 2 is connected to the motor 27 of the electric power steering and the power source 26 for the ECU, which are loads of the ECU, and the ECU 2. Subsequently, the ECU 2 is set to an operating state in which the motor 27 is driven under a predetermined condition.

After setting the electrostatic test apparatus 1 and the ECU 2, the personal computer 4 is operated to start an electrostatic test.
A control signal is transmitted from the personal computer 4 to the static electricity generator 5 and the stepping motor driver 11. The static electricity generator 5 transmits static electricity to the discharge gun 7. The stepping motor driver 11 outputs pulse power to the Y-axis stepping motor 12 and the Z-axis stepping motor 14.
The discharge gun 7 moves in the Z direction at about 5 mm / s from a position 15 mm or more away from the wiring 30. When the discharge gun 7 and the wiring 30 are at a predetermined distance, static electricity is discharged from the discharge gun 7 to the wiring 30. The discharge gun 7 moves to a position in contact with the wiring 30 in order to reliably apply static electricity to the wiring 30.
After applying static electricity to one wiring 30, the discharge gun 7 moves in the Y direction by a distance input in advance to the personal computer 4 and stops at a position facing the other wiring 30. And it moves to a Z direction and discharges static electricity to the other wiring 30. FIG.
In this way, the discharge gun 7 applies static electricity continuously to all the wires 30 constituting the harness 3.

In the electrostatic inspection, the discharge voltage is ± 5 kV, ± 10 kV, ± 15 kV, ± 20 kV, ± 25 kV, and discharge is performed 10 times at each discharge voltage. The resistance of the ECU 2 is inspected by detecting information on the operating state of the ECU 2 at this time.
After the inspection at the predetermined discharge position A is completed, the electrostatic test apparatus 1 is moved to the discharge position B where the electrostatic test is performed next using the handle 29 provided in the electrostatic test apparatus 1.
And after fixing each wiring 30 to each groove | channel 24 of the mounting member 8 in the discharge position B, the personal computer 4 is operated and the test similar to the electrostatic test performed in the discharge position A is performed.
In addition, the discharge positions A, B, and C are set, for example, at a distance of 100 ± 50 mm, 900 ± 50 mm, and 500 ± 50 mm from the ECU 2.

(Comparative example)
Next, an electrostatic test using the electrostatic test apparatus 100 of the comparative example will be described.
In the electrostatic test apparatus 100 of the comparative example, the mounting member 81 and the support body 17 are separated. For this reason, as shown by the arrow D, when the electrostatic test apparatus 100 is moved from the discharge position A to the discharge position B, the reference position of the mounting member 8 and the reference position of the support 17 may be shifted. If the electrostatic test is performed in such a state, static electricity is not reliably applied from the discharge gun 7 to each wiring 30, and the inspection accuracy may deteriorate.

(Effect of this embodiment)
In this embodiment, in the personal computer 4, the Y-axis linear guide 13 stops the discharge gun 7 for each groove 24, and then the Z-axis linear guide 15 is connected to the wiring 30 on which the discharge gun 7 is placed in the groove 24. Control to approach and touch. The personal computer 4 controls the static electricity generator 5 to apply static electricity from the discharge gun 7 to the wiring 30. Thereby, by applying static electricity continuously to each wiring 30 placed in the plurality of grooves 24 by automatic control, the static electricity test can be unmanned for a long time and work efficiency can be improved. In addition, the inspection accuracy can be improved by eliminating manual electrostatic testing and centrally controlling the movement and discharge of the discharge gun 7 by the personal computer 4.

Moreover, in this embodiment, the mounting member 8 is attached to the positioning part 20 provided in the support body 17, and the reference positions S1 and S2 of the positioning part 20 and the reference positions S1 and S2 of the mounting member 8 coincide. Thereby, the distance between each groove 24 of the mounting member 8 and the reference position S1 and the distance between the discharge portion 71 of the discharge gun 7 and the reference position S2 are input to the personal computer 4 in advance, so that each wiring 30 The discharge gun 7 can be accurately moved to the position. For this reason, the manufacturing cost of the electrostatic test apparatus 1 can be reduced without using a sensor or the like that recognizes the position of each wiring 30.
Further, regardless of the movement of the electrostatic test apparatus 1 to the discharge positions A, B, and C, the mounting member 8 is accurately positioned with respect to the Y-axis linear guide 13 and the Z-axis linear guide 15. Therefore, the inspection accuracy of the electrostatic test can be improved.

(Second Embodiment)
FIG. 7 shows an electrostatic test apparatus according to the second embodiment of the present invention. FIG. 7 shows only the discharge gun 7, the discharge gun fixing jig 16, the second movable member 152, and the mounting member 82 of the electrostatic test apparatus.
In the present embodiment, the depths of the grooves 241, 242, and 243 provided in the mounting member 8 are formed corresponding to the diameters of the wires 31, 32, and 33 that constitute the harness 3 of the ECU 2, respectively. The surface of each wiring 31, 32, 33 on the discharge gun 7 side is aligned with the upper surface of the mounting member 8. As a result, the distance E between the surface of each wiring 31, 32, 33 on the discharge gun 7 side and the discharge gun 7 becomes constant.

Also in this embodiment, the distance between the discharge portion 71 of the discharge gun 7 and the reference position S2 is input in the personal computer 4 in advance. For this reason, the personal computer 4 transmits a control signal to the stepping motor driver 11 and supplies the stepping motor driver 11 with pulse power for moving the discharge gun 7 in the Z direction to a position where it contacts the surface of each of the wires 31, 32, 33. Can make it.
In the present embodiment, static electricity can be reliably applied to the wirings 31, 32, and 33 having different diameters. Therefore, the inspection accuracy of the electrostatic test can be improved.

(Other embodiments)
In the above-described embodiment, the electrostatic test apparatus 1 used for the electrostatic test for confirming the operation and resistance of the ECU 2 as the object to be inspected has been described. On the other hand, you may use the electrostatic test apparatus of this invention for the electrostatic test of to-be-inspected objects other than ECU.
In the embodiment described above, the discharge gun fixing jig 16 is provided on the second movable member 152. On the other hand, in the present invention, the discharge gun fixing jig 16 may be provided at the end of the first movable member of the Y-axis linear guide without providing the Z-axis linear guide.
In the embodiment described above, the discharge gun 7 is reciprocated in the Y direction and the Z direction. On the other hand, the electrostatic test apparatus of the present invention may include a driving unit that reciprocates the discharge gun in the X direction.
Thus, the present invention is not limited to the above-described embodiment, and can be implemented in various forms without departing from the spirit of the invention.

  1: electrostatic test device, 2: electronic control unit (ECU) (inspected object), 3: harness (inspected object), 4: personal computer (control means), 7: discharge gun, 8, 82: mounting member , 12: Y-axis stepping motor (first motor, first driving means), 13: Y-axis linear guide (first driving means), 14: Z-axis stepping motor (second motor, second driving means), 15: Z-axis linear guide (second drive means), 17: support, 24, 241, 242, 243: groove, 30: wiring (inspected object), 131: first guide member (first drive means), 132: First movable member (first drive means), 151: second guide member (second drive means), 152: second movable member (second drive means)

Claims (6)

An electrostatic test apparatus used in an electrostatic test for inspecting an operating state of the test object when static electricity is applied to the test object,
A discharge gun that discharges static electricity;
A mounting member in which a plurality of grooves on which the object to be inspected is mounted;
A first drive means for supporting the discharge gun at a position facing the mounting member, and capable of reciprocating the discharge gun in a direction in which the plurality of grooves are arranged;
Control means for controlling the first driving means so that the discharge gun stops for each groove and discharging static electricity from the discharge gun to the object to be inspected placed in the groove. Static electricity test equipment. A support for supporting the first drive means;
The electrostatic testing apparatus according to claim 1, wherein the mounting member and the support are attached to the groove of the mounting member at a position where the discharge gun faces.   The mounting member and the positioning portion are attached so that a reference position of the groove of the mounting member matches a reference position of a positioning portion provided on the support. 2. The static electricity test apparatus according to 2.   The electrostatic test apparatus according to any one of claims 1 to 3, further comprising second driving means that reciprocates the discharge gun in a direction in which the discharge gun faces the groove.   The depth of the said some groove | channel provided in the said mounting member is each formed corresponding to the thickness of the said to-be-inspected object mounted in the said groove | channel. The static electricity test apparatus as described in any one. The first driving means is driven based on a control signal output from the control means; and
A first guide member fixed to the support;
A first movable member guided by the first guide member and reciprocatingly moved in a direction in which the plurality of grooves are arranged according to the driving amount of the first motor;
The second driving means is driven based on a control signal output from the control means; and
A second guide member fixed to the first movable member;
5. A second movable member guided by the second guide member and configured to reciprocate in the direction in which the discharge gun faces the groove according to the driving amount of the second motor. 5. The static electricity test apparatus according to 5.

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