JP2003207533A - Article inspection method and inspection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a manufacturing cost of an article by heightening work efficiency of inspection, while keeping consistency between measurement data and the article, concerning the article requiring a plurality of inspection processes. <P>SOLUTION: In this inspection method of the article A requiring the plurality of inspection processes, data D for specifying the article A and data E for showing an inspection result in a former inspection process are printed on the article A or an object C integrated with the article A, and printed data D, E are read in a latter inspection process, and the data E for showing the inspection result in the former inspection process is compared with the data for showing the inspection result in the latter inspection process. An electrical double layer capacitor or the like requiring an overload test between the former inspection process and the latter inspection process can be inspected by the inspection method. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection method and an inspection apparatus for an article, and more particularly to an inspection method and an inspection apparatus for an article such as an electric double layer capacitor which requires a plurality of inspection steps.

[0002]

2. Description of the Related Art Conventionally, for example, before shipping an electric double layer capacitor (hereinafter, abbreviated as “capacitor” as appropriate), an inspection as shown in FIG. .

Since this capacitor is vulnerable to temperature changes,
After the previous step of step S1, in step S2, a high temperature storage test is performed as an overload test to reduce initial defects. This overload test is performed at a temperature of 60 ° C, for example, 4
Carry out about 0 hours. Then, in step S3, the characteristics of the capacitor are measured, and in step S4, it is determined whether the product is a good product or a defective product. If the product is a good product, the process proceeds to the next step in step S5. Was.

According to the above-described inspection method, when the product is defective, it cannot be determined whether the product is defective in the overload test or defective in the previous process. It was necessary to compare the measured data.

In order to make such a comparison, it is premised that the object to be measured and the measurement data match. Therefore, the objects to be measured are arranged in a tray in order and stored, various measurements are performed without changing this order, the measurement data is stored in a storage medium, and the measurement after the overload test is performed from the same tray. Items were taken out in order and measured, and the measurement data were compared.

[0006]

However, in the above-mentioned inspection method, there is a possibility that the consistency between the object to be measured and the measurement data becomes unclear. For example, if the operator mistakes the tray number, drops the tray on the floor and changes the arrangement of the DUT, or loses the data in the storage medium, the measured data and the DUT are The consistency was broken, which was a cause of erroneous judgment.

Therefore, the present invention has been made in view of the above problems in the conventional inspection method, and maintains the consistency between the measurement data and the object to be measured even when there are a plurality of inspection steps. An object of the present invention is to provide an inspection method capable of clearly ascertaining in which inspection process a defect has occurred, and at the same time increasing the inspection work efficiency and reducing the manufacturing cost.

[0008]

In order to achieve the above object, the invention according to claim 1 is a method of inspecting an article which requires a plurality of inspection steps, and comprises data for specifying the article,
Data indicating an inspection result in the pre-inspection step is printed on the article or an article integrated with the article, the printed data is read in the post-inspection step, and data indicating an inspection result in the pre-inspection step It is characterized by comparing with data showing an inspection result in the post-inspection step.

According to a second aspect of the present invention, as one form of the article inspection method according to the first aspect, the article is an electric double-layer capacitor, and is provided between the pre-inspection step and the post-inspection step. It is characterized by performing a load test.

The invention according to claim 3 is an inspection apparatus for an article which requires a plurality of inspection steps, wherein the data for specifying the article and the data showing the inspection result in the pre-inspection step are provided for the article or It is characterized in that it is provided with means for printing on an article integrated with the article and means for reading the printed data in the post-inspection step.

According to a fourth aspect of the invention, as an embodiment of the article inspection apparatus according to the third aspect, the article is an electric double layer capacitor, and the electric double layer capacitor before the overload test is performed by the printing means. The characteristic measurement data and the identification number of the electric double layer capacitor are printed on the electric double layer capacitor, and after the overload test, by the reading means,
The characteristic measurement data and the identification number of the electric double layer capacitor are read.

Further, according to the present invention, since the data indicating the inspection result in the pre-inspection step and the data for specifying the article are printed on the article, it is necessary to align the article on a tray or the like and shift to the post-test step. Even if the operator mistakes the tray number, drops the tray on the floor and changes the arrangement of the articles, or loses the data in the storage medium, the consistency between the inspection data and the article is maintained. be able to. Further, since the printed data is read in the post-inspection step, it is not necessary to store the inspection data in the pre-test step in a storage medium in advance or move the inspection data together with the article between the steps. As a result, it is possible to eliminate erroneous determination due to a mismatch between the article and the inspection data, and to prevent non-execution of comparison determination due to deletion of the inspection data.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, specific examples of embodiments of an article inspection method and an inspection apparatus according to the present invention will be described with reference to the drawings. In the following description, the article to be inspected is an electric double layer capacitor.

FIG. 1 shows a first electric double layer capacitor inspection apparatus according to the present invention (hereinafter abbreviated as "inspection apparatus").
FIG. 2 is a plan view showing the index table 1 provided at the center of the device.
Rotates intermittently in the direction of the arrow at constant pitch intervals.

On the upper surface of the index table 1, blocks 2 each holding a capacitor A one by one and having an insulating block 3 (see FIG. 3) as a terminal receiver are provided at the same pitch as the rotation pitch of the index table 1. ing.

Around the index table 1, a supply unit 4 for supplying the capacitor A to the block 2, charging units 5, 6 for charging the capacitor A, a voltage measuring unit 7 for measuring the residual voltage, and an equivalent series resistance. ESR measuring unit 8 for measuring
As shown in FIG. 2, the identification number D and the measurement data E are printed on the label C, and the printing / pasting section 9 for sticking the label C on the product and the discharging section 1 for discharging the defective capacitor A.
0 and a storage unit 11 for storing a capacitor A as a good product
And are arranged.

In this embodiment, the label C on which the identification number C and the measurement data E are printed is attached to the capacitor A. However, the label C is directly used without using the label C by the ink jet method or the laser method. The identification number C and the measurement data E may be printed on the capacitor A.

Charging unit 5, 6, voltage measuring unit 7, and ESR
The measuring unit 8 is provided with the probe unit shown in FIG. This probe unit includes an air cylinder unit 23 that vertically moves a probe 25 that comes into contact with a terminal B of a capacitor A, a probe fixing block 24, and a probe fixing block 24.
A holding pin or the like (not shown) for preventing the capacitor A from floating is provided. When the capacitor A is mounted on the holding unit 2 and reaches below the probe 25, the probe 25 descends and comes into contact with the terminal B of the capacitor A. The other end of the probe 25 is electrically connected to the measurement terminal of each measuring device to perform each measurement.

FIG. 4 is a plan view showing a second inspection apparatus according to the present invention. An index table 1 is provided at the center of this apparatus, and the index table 1 is
It rotates intermittently at regular intervals.

On the upper surface of the index table 1, blocks 2 each holding a capacitor A one by one and having an insulating block 3 (see FIG. 3) as a terminal receiver are provided at the same pitch as the rotation pitch of the index table 1. ing.

Around the index table 1, a supply unit 4 for supplying the capacitor A to the block 2, charging units 5, 6 for charging the capacitor A, a voltage measuring unit 7 for measuring the residual voltage, and an equivalent series resistance. ESR measuring unit 8 for measuring
A capacitance measuring unit 12 for measuring electrostatic capacitance, a reading device 13 for measuring data E and an identification number C, and a defective capacitor A.
A discharge section 10 for discharging the capacitor and a storage section 11 for storing the non-defective capacitor A are arranged.

In this embodiment, measurement data E and identification number C
Uses a two-dimensional bar code system.
Further, similar to the above-described inspection device first, the charging units 5, 6,
The measuring units 7 and 8 are provided with the probe unit shown in FIG. 3, and the probe 25 that comes into contact with the terminal B of the capacitor A is used.
Is equipped with.

Next, the operation of the first and second inspection devices having the above-mentioned structure will be described with reference to FIGS. 5 and 6.

As shown in FIG. 5, the first inspection apparatus sequentially conveys the capacitor A supplied to the block 2 on the index table 1, and in steps S1 and S2,
Charging is performed by the charging units 5 and 6, and the residual voltage is measured by the voltage measuring unit 7 in step S3. If it is determined to be defective in step S3, it is collected in the discharge unit 10 in step S8.

If it is determined in step S3 that the product is non-defective, the ESR measuring unit 8 performs E in step S4.
If SR measurement is performed and it is determined to be defective, it is collected in the discharge unit 10 in step S8. If it is determined in step S4 that the product is non-defective, then in steps S5 and S6, the measurement / data E and the identification number D are printed on the label C by the printing / adhesive unit 9 and affixed to the capacitor A. Store in 11.

As shown in FIG. 6, the second inspection apparatus sequentially conveys the capacitor A supplied to the block 2 on the index table 1, and in steps S1 and S2,
Charging is performed by the charging units 5 and 6, and the residual voltage is measured by the voltage measuring unit 7 in step S3. If it is determined to be defective in step S3, it is collected in the discharge unit 10 in step S9.

If it is determined in step S3 that the product is non-defective, the ESR measuring section 8 determines E in step S4.
If SR measurement is performed and it is determined to be defective, it is collected in the discharge unit 10 in step S9. When it is determined that the product is non-defective in step S4, the capacitance is measured by the capacitance measuring unit 12 in step S5, and when it is determined that the product is defective, the capacitance is collected in the discharging unit 10 in step S9.

If it is judged as a non-defective product in step S5, the print data of the capacitor A is read in step S6, and the measured data is compared with the read data in step S7. In step S9, the product is collected in the discharge unit 10, and if it is determined as a non-defective product, it is stored in the storage unit 11 in step S8.

Next, regarding the overall operation of the inspection method according to the present invention, including the operations of the first and second inspection devices,
A description will be given with reference mainly to FIG. 7.

First, in step S1, the test in the previous process is performed, and in step S2, the inspection by the above-described first inspection apparatus is performed. Next, in step S3, it is determined whether the capacitor A is good or bad, and if it is determined as bad,
It collects in step S8. On the other hand, if it is determined in step S3 that the product is non-defective, an overload test is performed in step S4. As described above, this overload test is a high temperature storage at a temperature of 60 ° C. for about 40 hours to reduce the initial failure.

Then, after step S4, step S5
In, the inspection by the above-mentioned second inspection device is performed. Next, in step S6, it is determined whether the capacitor A is good or bad, and if it is determined to be bad, the capacitor A is collected in step S8. On the other hand, when it is determined in step S6 that the product is non-defective, the process proceeds to the next step in step S7.

As described above, according to the inspection method of the present invention, since the measurement data E and the identification number C by the first inspection device are printed on the capacitor A, the following second inspection device is used. It is not necessary to align and transfer the capacitors A to a tray or the like for the inspection by the operator, and the operator may make a mistake in the tray number or drop the tray on the floor to change the arrangement of the capacitors A, or the storage medium. Even if the data of 1 is lost, the consistency between the inspection data and the capacitor A can be maintained. Also, in the inspection by the second inspection device, the printed measurement data E
Since the identification number C is read, it is not necessary to store the measurement data E by the first inspection device in the storage medium in advance, or to move the paper or the like on which the measurement data E is written together with the capacitor A between the steps. As a result, it is possible to eliminate erroneous determination due to mismatch of the inspection data between the capacitor A and the first and second inspection devices, and it is possible to prevent non-execution of comparison determination due to deletion of the inspection data.

FIG. 8 shows an embodiment of the first and second inspection devices. Each measuring device is a personal computer S
Using one PCI expansion slot, an interface board such as a GP-IB board S9 is used to communicate with each measuring instrument. Similarly, a label printer S6, a mechanical control unit S8, a bar code reader S7.
Are communicating using, for example, the RS-232C board S10. Each interface board, measuring instrument, control unit, etc. are connected by a dedicated cable.

The supply section 4 of the first inspection device and the second inspection device may be provided with a front / back surface determination mechanism for detecting the edge of the capacitor A by a laser sensor and performing front / back surface determination. Further, as a supply mechanism of the condenser A and a take-out mechanism in the storage section 11, a vacuum suction pad and a pick & place unit can be used together. Further, at each stop position, a detection function for detecting the presence or absence of the capacitor A, for example, a photoelectric sensor or the like is arranged, whereby, for example, an operator takes out the capacitor A being measured from the holding unit 2 or the like. Even if a sudden accident occurs, the detection data is detected at each stop position, so that the mismatch between the measured data and the capacitor A can be minimized.

As a method of comparing the print data with the data measured by the second inspection device, the change rate of the measured data is calculated with respect to the print data, and the pass / fail judgment is performed with the change rate of about 10% as a boundary. be able to.

[0036]

As described above, according to the present invention,
Even if there are multiple inspection processes, it is possible to maintain consistency between the measurement data and the object to be measured, to clearly understand which inspection process caused the defect, and to increase the inspection work efficiency and manufacture. It is possible to provide an article inspection method and an inspection apparatus that can reduce costs.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing a first inspection apparatus according to the present invention.

FIG. 2 is a schematic view showing a capacitor according to the present invention, in which (a) is a plan view and (b) is a side view.

FIG. 3 is a side view showing a probe unit of the inspection device according to the present invention.

FIG. 4 is a schematic plan view showing a second inspection apparatus according to the present invention.

5 is a flowchart showing the operation of the first inspection device in FIG.

6 is a flowchart showing the operation of the second inspection device of FIG.

FIG. 7 is a flowchart showing the overall operation of the inspection method according to the present invention.

FIG. 8 is a configuration diagram showing an embodiment of a system for carrying out the inspection method according to the present invention.

FIG. 9 is a flowchart of a conventional inspection method.

[Explanation of symbols]

1 Index table 2 blocks 3 insulating blocks 4 Supply Department 5 charging section 6 charging section 7 Voltage measurement section 8 ESR measurement section 9 Printing / pasting section 10 Discharge part 11 Goods storage 12 Capacity measurement section 13 Reader 23 Air cylinder unit 24 Probe fixing block 25 probes A capacitor B terminal C label D identification number E measurement data S1 personal computer S2 power supply S3 voltage measuring instrument S4 ESR measuring instrument S5 capacity measuring instrument S6 Label printer S7 barcode reader S8 Mechanical control unit S9 GP-IB board S10 RS-232C board

Claims (4)

[Claims] 1. A method for inspecting an article which requires a plurality of inspection steps, wherein the data for specifying the article and the data showing the inspection result in the pre-inspection step are integrated with the article or the article. The method of inspecting an article, wherein the printed data is read in a post-inspection step, and the data indicating the inspection result in the pre-inspection step is compared with the data indicating the inspection result in the post-inspection step. . 2. The article inspection method according to claim 1, wherein the article is an electric double layer capacitor, and an overload test is performed between the pre-inspection step and the post-inspection step. 3. An inspection apparatus for an article requiring a plurality of inspection steps, wherein the data for specifying the article and the data showing the inspection result in the pre-inspection step are integrated with the article or the article. And a means for reading the printed data in a post-inspection step. 4. The electric double layer capacitor, wherein the printing means prints characteristic measurement data of the electric double layer capacitor before an overload test and an identification number of the electric double layer capacitor by the printing means. 4. The article inspection apparatus according to claim 3, wherein the characteristic measuring data of the electric double layer capacitor and the identification number are read by the reading means after printing on a capacitor and after an overload test.