KR20150065451A - Apparatus and method for automatically testing a quality of microspeaker - Google Patents

Abstract

The present invention relates to a micro speaker quality testing device capable of; performing a rapid and accurate quality test by using a product testing device using a quality measuring device for a micro speaker which is mass-produced; classifying a product according to the quality level in case of fair quality; and separating and collecting the product according to defect type in case of a defective product, and to a method thereof. The micro speaker quality testing device comprises a test pallet, a test pallet conveyer, a product supply loader, a product measuring place unit, a product discharge loader, a fair quality carrying conveyer, and defective product collecting boxes.

Description

[0001] APPARATUS AND METHOD FOR AUTOMATICALLY TESTING A QUALITY OF MICROSPEAKER [0002]

The present invention relates to an apparatus and a method for automatically checking the quality of a micro speaker, and more particularly, to an inspection apparatus and method for automatically checking a quality state of a micro speaker manufactured through a production line.

In the case of portable electronic devices including smartphones, which are currently on the market, functions such as an MP3 player, a voice recorder, a radio, a TV, and a camcorder which have conventionally existed as individual functions are integrated into one device. One of the common elements of these functions is that all of these functions are related to the reproduction of sound. Accordingly, a small micro speaker is incorporated in the electronic device, and as the size of the electronic device is miniaturized, the micro speaker used for the electronic device needs to be further miniaturized. If the quality of the produced product is not guaranteed, Resulting in degradation of the performance and value of the system.

Therefore, it is very important from the perspective of a maker of a micro speaker that it is possible to filter defective products through quality testing of produced micro speakers and to supply only good products as parts of finished electronic devices.

However, as micro speakers become increasingly smaller and more mass-produced, the likelihood of producing a large number of defective products is increasing, and in fact, a large number of defective products are generated during the production of the product. As a result, a strict quality inspection of the produced micro speaker is indispensable, but the quality inspection is not only time consuming, but also requires a lot of inspection personnel.

In this regard, in the case of the quality inspection laboratories to be used for the quality inspection of the produced products, not only the proficiency level of the inspection laborers is different, but also in the case of individual inspection laborers, the condition of the body may change according to the situation. In the case of quality inspection, it is not always possible to guarantee uniform quality inspection.

Also, in the case of quality inspection by manpower, it is only possible to confirm whether the product to be inspected is good or defective, and it is difficult to confirm the defect type of the product. It is necessary to be able to confirm the defect type of the product so that the defect rate can be reduced by making the improvement of the production process based on the type of the defect.

Therefore, there is a need for an apparatus and method that not only can perform quick and accurate quality inspection of a mass-produced micro speaker, but also can distinguish types of defects.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a quality inspection apparatus and method that can quickly and accurately check the quality of a micro speaker manufactured in a large quantity.

It is another object of the present invention to provide a quality inspection apparatus and method capable of sorting defective products by types of defects through quality inspection of products to be produced.

The present invention also provides a quality inspection apparatus and method for classifying a product by class according to a quality level, as well as distinguishing a product into a good product and a defective product.

According to an aspect of the present invention, there is provided a computer system comprising: a computer for inputting a measurement item to a measuring instrument, inputting an inspection specification, and receiving a test result from the measuring instrument; A measuring device for measuring a sound generated through a micro speaker according to a measurement item and a specification input from a computer through a microphone and analyzing the product to determine a good product and a defective product; And a program logic controller (PLC) for receiving a signal of the determination result from the measuring device.

Further, the inspection apparatus of the present invention includes: a inspection pallet in which a product to be inspected is located; An inspection pallet conveyor for conveying inspection pallets; A product supply loader for recognizing the position of the inspection pallet and aligning the inspection target product with the product measurement seating part and performing quality inspection according to the set measurement items and specifications; A product discharge loader which picks up the product whose quality inspection has ended and selectively discharges the product according to the inspection result or defective product; And a defective product collection box for collecting defective products discharged by type of defects, and a good product discharge conveyor for carrying good products discharged from the product discharge loader.

According to another aspect of the present invention, there is provided an inspection method comprising: setting a measurement item and an inspection specification in a computer; Inputting master sample data necessary for inspection; Setting a measurement mask for each item; Executing a test start command through a computer; Outputting an inspection signal to the micro speaker; Transmitting sound generated from the micro speaker to a microphone; Analyzing a sound input to the microphone by the meter; Transferring the analysis data and a pass / fail determination result to a program logic controller (PLC); And displaying the measurement result on a computer monitor.

The operation associated with the apparatus of the present invention comprises the steps of the product dispenser loading the product into the inspection pallet on the pallet conveyor with the start of operation of the inspection apparatus; Placing the product supply loader on the product measurement mount after picking up the product; Measuring a product; Transferring the measured result to a program logic controller (PLC) and a computer device; Moving the product supply loader to the inspection pallet and moving the product discharge loader to the inspection position; The product discharge loader picking up the measured product; According to the measurement result, the defective article is discharged to the defective article collection box according to the defective type, and the good article is conveyed to the good article conveyor belt.

According to the present invention, the produced product can be quickly, accurately and uniformly inspected, thereby improving not only the reliability of the inspected product but also the time and cost.

In addition, according to the present invention, the types of defects with respect to the product to be inspected are immediately grasped, so that the countermeasures and countermeasures against the cause of defects can be facilitated and the defective product rate can be lowered.

The same reference numbers are used for the same components throughout the drawings of the present invention, and similar reference numerals are used for similar components.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a measuring system of the present invention. FIG.
2A is a diagram showing an example of a product testing apparatus of the present invention.
2B is a diagram showing another example of the product inspection apparatus of the present invention.
3 is a diagram showing still another example of the product testing apparatus of the present invention.
4 is a diagram showing still another example of the product testing apparatus of the present invention.
5 is a flowchart showing the operation of the product inspection apparatus of the present invention.

Referring to Figure 1, a schematic diagram of a measurement system 100 of the present invention is shown.

The measurement system 100 comprises a computer device 110 including a monitor, a meter 120 also referred to as a signal analyzer, a micro speaker 130, a microphone 140, and a program logic controller (PLC). The measurement system 100 is a very important system as a key element of the product inspection apparatus to be described subsequently. Each of the constituent elements of the measurement system 100 will be described below.

The computer device 110 serves to input test measurement items, test specifications, and test measurement commands to the measuring device 120. The test results of the test device 120 through the monitor of the computer device 110 It is displayed to the administrator. The test items may be frequency characteristics, sound pressure level, impedance, resonance frequency (F0), total harmonic distortion, polarity, and heterogeneity. For each of these test items, In order to distinguish defective products, the inspection specification, which is a reference value for each inspection measurement item, is set. The inspection item and the inspection specification are input to the measuring device 120 through the computer device 110. The measuring device 120 inspects the product in accordance with the inspection measurement item and the inspection specification, from which a signal is input from the computer device 110, to check whether the product to be inspected is defective. The micro speaker 130 is a product to be inspected. When a measurement command is transmitted from the computer device 110 to the measuring device 120, the measuring device 120 outputs an inspection signal (one sweep) to the micro speaker 130. The sound generated through the micro speaker 130 is received through the microphone 140 connected to the measuring device 120 and the measuring device 120 analyzes the signal transmitted through the microphone 140. The analyzed result data is compared with the inspection specification set in the measuring device 120 and used to determine whether or not the product is defective. The inspection result from the measuring instrument 120 is transmitted to a program logic controller (PLC) 150 connected to the measuring instrument 120 and used to control the product testing apparatus 200 to be described later. In addition, the inspection result transmitted to the program logic controller (PLC) 150 is displayed through the monitor of the computer device 110 connected to the measuring device 120. As a result, the administrator can easily identify the status of the product being produced through the results displayed through the monitor, so that the user can immediately take necessary measures when necessary.

2A and 2B are diagrams schematically showing a product inspection apparatus 200 for inspecting whether a product is defective. The difference between FIGS. 2A and 2B is that only the number of channels of the product measurement seating part 230 for inspecting the product is different and all other components are the same. Therefore, the description will be made with reference to Fig.

The product inspection apparatus 200 shown in FIG. 2A includes an inspection pallet 210, an inspection pallet conveyor 220, a product supply loader 230, a product measurement mounting unit 240, a product discharge loader 250, (260), and a defective article storage box (270). In this regard, each component will be described as follows.

In the inspection pallet 210, a product to be inspected is placed by a product supply worker supplying a product to be inspected, and a plurality of inspection pallets 210 may exist. The inspection pallet conveyor 220 for supplying the inspection pallet 210 to the product supply loader 230 is composed of a rotary type conveyor.

The product supply loader 230 detects the arrival of the inspection pallet 210 conveyed through the inspection pallet conveyor 220 at a predetermined position and picks up the product to be inspected contained in the inspection pallet 210, (240). As for the pick-up of the product, the target product is small, and the product must be picked up from the inspection pallet 210 and picked up until the inspection is completed. In this regard, although not shown in the present invention, it is general that pickup is performed through the following three methods. The first method is a magnet method, which is a method of picking up using a magnet mounted in a micro speaker. The second method is a chalking method, which uses soft materials such as rubber, urethane, silicone and the like instead of a hard material such as aluminum in order to prevent damage to the product by picking up the product using a forceps. The third method is an air adsorption method in which the product is picked up by suction using air pressure.

In the product measurement seating unit 240, the product is inspected according to the set inspection item and the inspection specification. At this time, the pitch between the products mounted on the inspection pallet 210 may be different from the pitch between the positions where the products in the product measurement seating part 240 are seated. Therefore, the product supply loader 230 is designed so that the product loaded on the inspection pallet 210 can be picked up and precisely fit to the product position of the product measurement seating part 240 irrespective of such different pitches . With this design, it is possible to achieve a smooth product seating despite the difference in pitch spacing.

In addition, many unforeseen circumstances may arise in the course of the inspection and, if appropriate measures are not taken, a smooth product inspection may not be performed. Therefore, sufficient measures should be taken to cope with such an unexpected situation.

First, the wire of the JIG may be disconnected during the inspection of the product. In this case, the contact becomes poor, and the inspection product is classified as defective of impedance and discharged to the defective product collection box. These emissions are discharged from the 1st to 4th time to the Impedance Defective Collection Box. From the 5th time, the audible alarm sounds and the product inspection is not carried out, and the manager can identify and cope with the problem.

Second, there may occur a case where two products are stacked on the channel of the product measurement seating part 240. [ This is the case where the inspected product 240 is not discharged due to the weak air pressure of the product discharge loader 250 or foreign matter after the product inspection is completed. In this case, due to abnormality of the height received through the sensor of the inspection jig, an error beep sounds and the inspection is stopped. After that, the administrator removes the remaining product that is not picked up through visual confirmation, and resumes the work.

Third, in the case of the equipment setting, if the inspection program of the computer device 110 is set to be not automatic but manual, the signal being under test is not received from the program logic controller (PLC) 150, Beeps and does not test.

Fourth, if the computer program stops and the program becomes visible, the test may not be performed.

Fifth, when the product discharging loader 250 picks up the measured product and there is no product or pickup in one of the channels in the inspection and measurement seating unit 240, a warning sound sounds and the process does not proceed any more. Failure to pick up the product will result in a false inspection because the channel will have two products in the next cycle.

Sixth, when the air pressure used in the product testing apparatus 200 falls below the preset air pressure, a warning sound is emitted and the inspection is not proceeded.

Seventh, if excessive defects occur more than the set defective rate, a warning sound is generated and the inspection is not proceeded.

Eighth, when there is a problem in the equipment during the product inspection, a warning tone sounds and the cause of trouble or inspection contents can be displayed on the screen so that the manager can easily take action.

After the inspection is completed, the product discharge loader 250 moves to the product measurement seating part 240 to pick up the finished product. The inspected product picked up by the product discharge loader 250 is discharged to the good product discharge conveyor 260 according to the inspection result of the product, and the defective product is discharged to the respective defective article storage box 270 according to the type of defect .

The type of defect for the defective product can be set through the processor program of the product inspection apparatus 200. [ For example, the type of defective product is classified into five types (for example, defective 1 is defective, defective 2 is frequency characteristic, sound pressure level (SPL) is defective, defective 3 is defective of resonance frequency, defective 4 is total harmonic distortion ) Defective, defective 5 is polarity, and impedance is defective), the product discharge loader 250 classifies the products according to the type of the defective product by setting the type from defective 1 to defective 5. At this time, the product discharge loader 250 can accurately discharge the defective item to the defective article storage box 270 by setting the position coordinate for each defective type in the product discharge loader 250. As such, it is possible to classify products by the type of defects, so that the process improvement can be achieved based on the type of defective data.

In addition, even in the case of good products, the product can be separated according to the quality level of good products. As in the case of defective products, it is possible to set the desired level of good products in a class unit through the inspection processor program. For example, if a good product is to be classified into three classes and set to a class 3, and a mask is set, the product discharge loader 250 separates the good products according to the product inspection results and discharges them. In this regard, by setting the position coordinates of the good products according to the classes classified in the product discharge loader 250, the product discharge loader 250 can place the good products in the predetermined place on the conveyor corresponding to each class. The manager can confirm the quality level of the product by confirming the quantity distribution of the class of the product currently being produced based on the data of the class of the produced product so that the process of the product can be improved.

2A and 2B show only differences in the number of channels of the product measurement seating units 240 and 240-1 where the inspection target product is placed, and all the other components are the same. In FIG. 2A, only two channels are shown as channel 1 and channel 2 of the product measurement seating unit 240, while in FIG. 2B, as many channels as the product testing apparatus 200 are extended to n channels Can be seen. That is, as the number of channels of the product measurement seating portion 240-1 increases, the inspection time for the product can be shortened.

FIG. 3 is a view showing another example of the product inspection apparatus 200 in which several units of the product inspection apparatus 200 shown in FIG. 2B are connected in series and connected to one good output discharge conveyor 260. In this regard, as can be seen from the drawing, the good products of each product inspection apparatus 200 inspected through the plurality of product inspection apparatuses 200 are discharged through one good product discharge conveyor 260. Accordingly, as the number of completed products required for each product inspection apparatus 200 is reduced to one, the effect of minimizing the number of inspectors and reducing the cost can be expected.

FIG. 4 is a sectional view of the product inspection apparatus 200 shown in FIG. 2B. The product inspection apparatus 200 includes a first good product discharge conveyor 260 and a first good product discharge conveyor 260, And a second good-material discharge conveyor 270 for conveying a good product discharged from the first and second good-quality discharge conveyors 270 and 270. As shown in FIG. The product inspection apparatus 200 shown in FIG. 4 is different from the product inspection apparatus 200 shown in FIG. 3 in that a good product discharge conveyor 260 is installed in each apparatus 200. A separate wide good-quality conveying conveyor 260-1 for collecting and conveying good-quality products discharged from the good-quality discharge conveyor 260 of each product inspection apparatus 200 separately from these individual good-quality discharge conveyors 260 Is installed. At this time, since the lengths of the good product discharge conveyor 260 installed in each product inspection apparatus 200 are different from each other, positions of good products placed on the good product delivery conveyor 260-1 are also different from each other. Although only three positions are shown in Fig. 4, positions where good products are placed may increase depending on the classification of good products. As described above with reference to FIG. 3, by arranging the product inspection apparatuses 200, the number of completed products required for each product inspection apparatus 200 is reduced to one, And the cost reduction effect can be expected.

5 is a flowchart showing the steps for product inspection performed through the product inspection apparatus 200 of the present invention.

When the measurement command is transmitted from the computer device 110 of FIG. 1 to the product inspection apparatus 200 for the product inspection, the product inspection apparatus 200 checks the inspection items set in the measuring apparatus 120 and the product inspection Process (step 510). Upon commencement of the product inspection, the product supply person loads the inspection target product on the inspection pallet 210 (step 520). The product placed on the inspection pallet 210 is transported to the product supply loader 230 through the inspection pallet conveyor 220. When the product supply loader 230 arrives at the set position, After the arrival of the product, the product on the inspection pallet 210 is picked up and placed on the product measurement seating part 240 (step 530). When the header attached to the product supply loader 230 is lowered at the same time as the seat is set, the sensor is operated and the processor in the apparatus transmits a command to start the inspection for the product to the computer device 110, (Step 540), and the result of the measured all channels is transferred to the program logic controller (PLC) 150 and the computer device 110 (step 540) Step 550). After receiving the measurement result, the product supply loader 230 moves from the product measurement mount 240 to the original position for picking up the next product loaded on the inspection pallet 210, and the product discharge loader 250 And moves to the product measurement seating portion 240 for pickup of the inspected product (Step 560). The product discharge loader 250 moved to the product measurement seating unit 240 picks up the inspected product (step 570). If all the results for the inspected product are acceptable, the product is discharged to the good discharge conveyor 260 (step 590-1). If the result of the inspected product includes both pass and fail, the process proceeds to step 590 (Step 580). In step 590, according to the inspection result of the product, in the case of defective product, the product is discharged to each defective product collection box 270 in accordance with the type of defective product, in the case of good product is discharged to the good product discharge conveyor 260, Is completed.

In the case of the inspection, although the micro speaker is described as a reference, the enclosure including the micro speaker may have some differences in the inspection target item or the inspection specification. Nevertheless, the micro speaker quality inspection apparatus and method of the present invention It is obvious to those of ordinary skill in the art that the same inspection can be performed on an enclosure and various other speaker products using the same.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the general inventive concept as defined by the appended claims. It is to be understood that modifications are possible and that such modifications are within the scope of the claims.

110: computer device 120: measuring instrument
130: Micro speaker 140: Microphone
150: program logic controller 210: inspection palette
220: Inspection pallet conveyor 230: Product supply loader
240: product measurement seating part 250: product discharge loader
260: Good product discharge conveyor 270: Defective collection box

Claims (18)

A computer device for inputting an inspection target measurement item and an inspection specification to the measuring device;
A meter for inspecting the micro speaker according to the inspection target measurement item input from the computer and the inspection specification; And
And a program logic controller (PLC) for receiving the test result data analyzed from the meter. The method according to claim 1,
Further comprising a microphone connected to the meter for receiving sound from the micro speaker. The method according to claim 1,
Wherein the computer device further comprises a monitor for displaying a test result transmitted from the measuring device. A inspection pallet on which a product to be inspected is loaded;
An inspection pallet conveyor for conveying inspection pallets;
A product supply loader for picking up a product to be inspected carried by the inspection pallet conveyor;
A product measurement seating part on which a product to be inspected picked up by the product supply loader is seated;
A product discharge loader for picking up the inspected product;
A good goods conveying conveyor for conveying good goods discharged from the product discharge loader; And
And a defective product collection box for collecting defective products discharged from the product discharge loader. 5. The method of claim 4,
Wherein the inspection pallet conveyor is a rotatable conveyor. 5. The method of claim 4,
Wherein the product supply loader further comprises a measurement head for product inspection. 5. The method of claim 4,
Wherein the product supply loader further comprises a pitch adjusting device for matching the pitches when the pitch between the picked-up products and the pitches of the channels of the product measurement seating part are different. 5. The method of claim 4,
Wherein the product measurement seating part comprises a plurality of channels. 5. The method of claim 4,
Wherein the product discharge loader is divided into a good product and a defective product according to a result of inspection. 10. The method of claim 9,
Wherein the product discharge loader classifies and outputs the good products in class. 10. The method of claim 9,
Wherein the product discharging loader discharges the defective products by type. 5. The method of claim 4,
Wherein the defective product collection box is a box distinguished by type of defects. A plurality of product inspection devices;
An inspection pallet conveyor corresponding to each product inspection apparatus; And
And a single good discharge conveyor for connecting a plurality of product inspection apparatuses. A plurality of product inspection devices;
An inspection pallet conveyor corresponding to each product inspection apparatus;
A first good article discharge conveyor corresponding to each product inspection apparatus; And
And a second good-quality discharge conveyor for conveying good products discharged through the first good-quality discharge conveyor of each of the product inspection apparatuses. 15. The method of claim 14,
And the lengths of the first good product discharge conveyors are different from each other. 15. The method of claim 14,
Wherein the width of the second good product discharge conveyor is wider than the width of the first good product discharge conveyor. Setting a measurement item and an inspection specification in a computer;
Inputting master sample data necessary for inspection;
Setting a measurement mask for each item;
Executing a test start command through a computer;
Outputting an inspection signal to the micro speaker;
Transmitting sound generated from the micro speaker to a microphone;
Analyzing a sound input to the microphone by the meter;
Transferring the analysis data and a pass / fail determination result to a program logic controller (PLC);
And displaying the measurement result on a computer monitor. Loading the product into the inspection pallet;
Placing the product supply loader on the product measurement mount after picking up the product;
Measuring a product;
Moving the product supply loader to the inspection pallet after the measurement is completed and moving the product discharge loader to the product measurement mount;
The product discharge loader picking up the measured product;
And discharging the good product to the defective product collecting box according to the defective type according to the measurement result.

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