TWI401112B - Filter leak inspection apparatus and filter leak inspection method - Google Patents

Description

Filter material leakage detecting device and filter material leakage detecting method

The present invention relates to a filter material leakage detecting device and a filter material leakage detecting method, and more particularly to a filter material leakage detecting device and a filter material leakage detecting method capable of improving the detecting speed and the recognition rate.

With the evolution of human industrial technology, many new-type experiments and factory manufacturing procedures require more and more cleanliness. Others, even for residential environments or safety considerations, hope to be as much as possible. Contaminants in the indoor air. In order to meet the needs of various environments, many air filtration materials have been developed to provide clean air of High Efficiency Particulate Air (HEPA) or ultra-fine dust particles of higher purity (Ultra- Low Particulate Air, ULPA).

Since the quality of the filter material will have a great impact on production or safety, in order to improve the reliability of the filter material, it is necessary to detect whether the filter material leaks. However, in the conventional detection method, the detecting personnel mostly perform scanning operations in the vicinity of the surface of the filter material by means of a hand-held particle counter to detect the leak position in the filter medium. However, this detection method is extremely time consuming, and the identification of the detection leak is gradually reduced to about 60% by the inspector under long-term operation. Therefore, how to develop a filter leakage detection device and detection method with high recognition and shorter detection time is one of the goals that the developer has achieved.

In addition, US Patent Nos. 6,177,678, US 7,334,490 B2, US 4,494,403, US 7,201,039 B2, US 7,210,363 B2, US 7,669,490 B2, US 7,649,174 B2, US 4,772,789, US 4,612,797, US 5,001,346, US 6,177,678 B1, US Patent Publication No. US 2006/027301 A1 and the research report on the design of the Okin-type hoods commissioned by the Institute of Labor Safety and Health of the Executive Yuan Labor Committee also proposed a variety of filter leakage detection devices and methods.

The invention provides a filter material leakage detecting device, which can save time required for detecting the filter material, and has high recognition degree.

The invention provides a filter material leakage detecting device, which can save time required for detecting the filter material and has high recognition.

The invention proposes another filter material leakage detecting device, which can also save time required for detecting the filter material and has high recognition degree.

The invention provides a filter material leakage detecting device, which comprises a gas glue supply unit, a filter material fixing unit and a leak detecting unit. The gas glue supply unit has a gas glue output unit, and the gas glue supply unit is adapted to supply the gas glue to the gas glue output end. The filter fixing unit fixes the filter material to the gas gel output end. The leak detection unit includes a scan module, an image capture unit, and a determination unit. The scanning module provides scanning light and moves the scanning light in a plane parallel to the filter material. When the filter material has a broken hole, the gas glue leaks from the broken hole and the scanning light is scattered at a position corresponding to the broken hole. The image capturing unit captures an image of the filter material. The determining unit is connected to the image capturing unit, wherein the determining unit receives the image and receives the image from the image The position at which the scanning ray is scattered is judged.

The present invention provides a filter material leak detection method that includes providing a gas gel to one side of a filter material. The leak detecting unit detects whether the filter material leaks on the other side of the filter material, and the leak detecting unit includes a scanning module, an image capturing unit, and a judging unit. The scanning module provides scanning light and moves the scanning light in a plane parallel to the filter material. When the filter material has a broken hole, the gas glue leaks from the broken hole and the scanning light is scattered at a position corresponding to the broken hole. The image capturing unit captures an image of the filter material. The judging unit is connected to the image capturing unit, wherein the judging unit receives the image and determines a position where the scanning light is scattered from the image.

The present invention provides another filter leakage detecting device that includes providing a side of the gas gel to the filter material. Scanning light is provided on the other side of the filter material and the scanning light is moved in a plane parallel to the filter material. When the filter material has a broken hole, the gas glue leaks from the broken hole and the scanning light is scattered at a position corresponding to the broken hole. The image of the filter material is taken from the other side of the filter material. The position where the scanning light is scattered is judged from the image.

In an embodiment of the invention, the scanning module moves in a first direction, and the first direction is substantially perpendicular to a direction in which the scanning light is transmitted.

In an embodiment of the invention, the scanning module includes a linear displacement mechanism and a light source. The linear displacement mechanism moves in a first direction, and the first direction is substantially perpendicular to the direction of transmission of the scanning ray. The light source is disposed on the linear displacement mechanism to provide scanning light.

In an embodiment of the invention, the scanning light is laser light.

In an embodiment of the invention, the filter material is located in a gas supply list Between the element and the image capture unit.

In an embodiment of the invention, the filter leakage detecting device may further include a displacement mechanism, wherein the image capturing unit is disposed on the displacement mechanism to adjust a relative position between the image capturing unit and the filter medium.

In an embodiment of the invention, the plane is located between the image capturing unit and the filter material.

Based on the above, since the filter material leakage detecting device proposed by the present invention uses the scanning beam to move in a plane parallel to the filter material to detect the position where the hole is located, the filter material leakage detecting device of the present invention can save time required for the detection. And its recognition is high. In addition, the filter material leakage detecting method proposed by the present invention can also save the time required for the detection and is less prone to the problem that the recognition degree is lowered due to the decrease in the physical strength (spirit) of the detecting person.

The above described features and advantages of the present invention will be more apparent from the following description.

1 is a schematic view of a filter material leakage detecting device according to an embodiment of the present invention. Referring to FIG. 1 , the filter material leakage detecting device 1000 of the present embodiment may include a gas glue supply unit 100 , a filter material fixing unit 200 , and a leak detecting unit 300 . The gas glue supply unit 100 has a gas glue output end 100a, and the gas glue supply unit 100 is adapted to supply a gas glue (not shown in FIG. 1) to the gas glue output end 100a. In this embodiment, the gas glue may be a liquid glue or a solid glue suspended in the air.

The gas supply unit 100 of the embodiment may include a duct 110, an airflow generating unit 120, a first filtering unit 130, a second filtering unit 132, and a The third filter unit 134, the fourth filter unit 136, the first rectification unit 140, the second rectification unit 142, and the particle generation unit 150. The airflow generating unit 120 provides a clean airflow F into the air duct 110 through the first filter unit 130, the second filter unit 132, the third filter unit 134, and the fourth filter unit 136. The clean airflow F is uniformly distributed after passing through the first rectifying unit 140 and the second rectifying unit 142, and is mixed with the particles (not shown in FIG. 1) generated by the microparticle generating unit 150 to form a uniform gas gel (FIG. 1). Not shown in the middle). It is worth mentioning that, in this embodiment, the use of the second rectifying unit 142 can prevent the airflow F from generating turbulence near the gas gel output end 100a and affecting the detection result.

The filter medium fixing unit 200 of the present embodiment fixes the filter medium 210 to the gas gel output end 100a. For example, as shown in FIG. 1, the filter material fixing member 200 can be directly pressed against the frame 210a of the filter material 210, whereby the filter material 210 can be fixed to the gas gel output end 100a. However, the present invention is not limited thereto. In other embodiments, the filter medium 210 may be fixed to the gas gel output end 100a by other means.

The leak detecting unit 300 of the embodiment may include a scanning module 310, an image capturing unit 320, and a determining unit 330. Figure 2 is an enlarged schematic view of a portion of the area of Figure 1. Referring to FIG. 1 and FIG. 2 simultaneously, the scanning module 310 of the present embodiment provides the scanning light L and moves the scanning light L on a plane P parallel to the filter material 210. When the filter material 210 has the broken hole H, the gas gel X leaks from the hole H, and the scanning light L is scattered at the position K corresponding to the hole H. For example, the filter material 210 is located on the x-y plane, and the scanning light L moves on a plane P parallel to the x-y plane, when the filter material 210 is broken. At the time of the hole H, the gas gel X leaks from the hole H, and the scanning light L is scattered at the position K corresponding to the hole H.

In more detail, the scanning module 310 of the present embodiment is movable along the first direction, and the first direction is substantially perpendicular to the transmission direction of the scanning light L. For example, the scanning module 310 can move along the y direction, and the y direction is substantially perpendicular to the direction of transmission of the scanning ray L (eg, the negative x direction). Further, the scanning module 310 of the embodiment may include a linear displacement mechanism 312 and a light source 314. The linear displacement mechanism 312 moves in a first direction, and the first direction is substantially perpendicular to the direction of transmission of the scanning ray L, and the light source 314 is disposed on the linear displacement mechanism 312 to provide the scanning ray L. For example, the linear displacement mechanism 312 of the present embodiment can be mounted on the track Sy extending along the y direction, and the light source 314 is disposed on the linear displacement mechanism 312 and emits the scanning light L in the negative x direction. The linear displacement mechanism 312 moves in the y direction along the track Sy, and the scanning light L transmitted in the negative x direction can sweep across the entire plane P parallel to the plane of the filter material 210 (for example, the x-y plane). In the present embodiment, the linear displacement mechanism 312 is, for example, an electric stage, the light source 314 is, for example, a laser diode, and the scanning light L is, for example, laser light.

The image capturing unit 320 of the embodiment is adapted to capture an image of the filter material 210. In the present embodiment, the filter material 210 is located between the gas supply unit 100 and the image capturing unit 320, and the plane P where the scanning light L is located is located between the filter material 210 and the image capturing unit 320. In detail, the image capturing unit 320 of the present embodiment can capture the image of the filter material 210 and the scanning light L according to the moving speed of the scanning light L, thereby determining whether the filter material 210 has The location where the hole H and the hole H are located. For example, if the width of the scanning light L in the y direction (not shown) is 2.2 cm and moves at a rate of 60 cm per second on a plane P parallel to the plane of the filter medium (for example, the xy plane), the image 撷The taking unit 320 can capture the image of the filter material 210 and the scanning light L at a rate of 30 frames per second. In other words, when the scanning light L is moved by 2 cm (less than the scanning light L width of 2.2 cm), the image capturing unit 320 captures an image of the filter material 210 and the scanning light L. In this way, the image capturing unit 320 can capture the image of the scanning light L sweeping through the entire plane P parallel to the filter material 210, thereby making the filter material leakage detecting device 1000 of the present embodiment highly recognizable. It is worth mentioning that, in general, the hole H (defect) in the filter material 210 is mostly caused by a collision and its diameter is greater than 0.4 cm, and the filter material leakage detecting device 1000 of the embodiment can detect a broken diameter of more than 0.4 cm. Hole H and its degree of recognition can be greater than 95%. .

The filter material leakage detecting device 1000 of the present embodiment may further include a displacement mechanism 400, wherein the image capturing unit 320 is disposed on the displacement mechanism 400 to adjust the relative position between the image capturing unit 320 and the filter material 210. In detail, the displacement mechanism 400 of the present embodiment may include a track Sx extending along the x direction and two tracks Sz1 and Sz2 extending parallel to each other and extending along the z direction, wherein the track Sx is mounted on the tracks Sz1 and Sz2, And the track Sx can be moved in the z direction by the tracks Sz1 and Sz2. In this embodiment, the image capturing unit 320 is mounted on the track Sx. Therefore, the image capturing unit 320 can be moved in the z direction by the tracks Sz1 and Sz2, in addition to being movable in the x direction by the track Sx. . In this way, when the size or the mounting position of the filter material 210 is changed, the image capturing unit 320 is changed. The relative position between the filter material 210 and the filter material 210 can be adjusted by the displacement mechanism 400 so that the influence of the filter material 210 and the scanning light L can be completely received by the image capturing unit 320.

The determining unit 330 of the embodiment is connected to the image capturing unit 320, wherein the determining unit 330 receives the image and determines from the image the position K at which the scanning light L is scattered. For example, the image capturing unit 320 (for example, a video camera) of the embodiment can capture all the images of the scanning light L across the plane P parallel to the filter material 210, and transmit the image to the determining unit 330 (for example, In the computer). After the image is processed by the judging unit 330 by using the image method, the brighter points of the images (ie, the position K where the scanning light L is scattered by the gas gel X) can be taken out, thereby determining the position where the gas gel X leaks (ie, the filter material). 210 is the location of the hole H). It should be noted that in the embodiment, the image capturing unit 320 is, for example, a video camera, and the focal length thereof can be appropriately designed to obtain a suitable working distance (ie, the distance between the filter material 210 and the image capturing unit 320). And reduce the probability of misjudging the position of the hole H caused by the aberration problem. For example, the focal length of the image capturing unit 320 of the embodiment may be 80 cm, but the invention is not limited thereto.

FIG. 3 is a schematic flow chart of the filter material leakage detecting method according to the embodiment. Referring to FIG. 2 and FIG. 3 simultaneously, the filter material leakage detecting method of the present embodiment may include the following steps: Referring to FIG. 2, the side of the gas material X to the filter material 210 is provided 210a (step S100). The scanning light L is provided on the other side 210b of the filter material 210 and the scanning light L is moved on a plane P parallel to the filter material 210 (step S110). When the filter material 210 has the broken hole H, the gas gel X leaks from the hole H. The scanning light L is scattered at a position K corresponding to the broken hole H. Filter The other side 210b of the material 210 captures an image of the filter material 210 (step S120). The position K at which the scanning light L is scattered is judged from the image (step S130). It is worth mentioning that the order of the foregoing steps S100 and S110 can be reversed. In detail, step S110 may be performed first, and then step 100 may be performed. Of course, step S100 may be performed first, and then step S110 is performed.

In more detail, as shown in FIGS. 2 and 4, the filter leakage detecting method of the present embodiment may include the step of providing the gas gel X to one side 210a of the filter material 210 (step S200). The filter unit 210 is detected by the leak detecting unit 300 on the other side 210b of the filter material 210 (step S210), and the leak detecting unit 300 may include a scanning module 310, an image capturing unit 320, and a determining unit 330. The scanning module 310 provides the scanning light L and moves the scanning light L on the plane P parallel to the filter material 210. When the filter material 210 has the broken hole H, the gas gel X leaks from the broken hole H and the scanning light L corresponds to the broken The position K of the hole H is scattered. The image capturing unit 320 captures an image of the filter material 210. The determining unit 330 is connected to the image capturing unit 320, wherein the determining unit 330 receives the image and determines from the image the position where the scanning light L is scattered. Through the above-described filter material leakage detecting method, the time required for detecting the filter material 210 can be saved, and the degree of recognition is high. In addition, it is not easy to cause a problem that the recognition degree is lowered due to a decrease in the physical strength (spirit) of the tester.

In summary, since the filter material leakage detecting device proposed by the present invention uses the scanning beam to move in a plane parallel to the filter material to detect the position where the hole is broken, the filter material leakage detecting device of the present invention can save the need for detection. Time, and its recognition is high. In addition, the filter material leakage detecting method proposed by the present invention can also save time required for detecting and is not easy to occur. The problem of low recognition due to a decrease in the physical strength (spirit) of the tester.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

1000‧‧‧Filter material leak detection device

100‧‧‧Gum supply unit

100a‧‧‧ gas gel output

110‧‧‧ duct

110a‧‧‧ the first half of the section

110b‧‧‧ lower half

120‧‧‧airflow generating unit 120

130, 132, 134, 136‧ ‧ filter unit

140, 142‧‧‧Rectifier unit

150‧‧‧Particle generating unit

200‧‧‧Filter material fixing unit

210‧‧‧ Filter media

210a‧‧‧The border of the filter material

300‧‧‧ leak detection unit

310‧‧‧ scan module

312‧‧‧Linear displacement mechanism

314‧‧‧Light source

320‧‧‧Image capture unit

330‧‧‧judging unit

400‧‧‧displacement mechanism

F‧‧‧Airflow

L‧‧‧ scanning light

P‧‧‧ plane

H‧‧‧Breaking

X‧‧‧ gas glue

K‧‧‧ position

Sy, Sz1, Sz2, Sx‧‧ track

S100, S110, S120, S130, S200, S210‧‧‧ steps

x, y, z‧‧ direction

1 is a schematic view of a filter material leakage detecting device according to an embodiment of the present invention.

2 is a schematic view of a portion of a filter material leakage detecting device according to an embodiment of the present invention.

3 and FIG. 4 are schematic diagrams showing the flow of a filter material leakage detecting method according to an embodiment of the present invention.

210‧‧‧ Filter media

310‧‧‧ scan module

320‧‧‧Image capture unit

330‧‧‧judging unit

L‧‧‧ scanning light

P‧‧‧ plane

H‧‧‧Breaking

X‧‧‧ gas glue

K‧‧‧ position

x, y, z‧‧ direction

Claims (9)

A filter material leakage detecting device comprises: a gas glue supply unit having a gas glue output end, wherein the gas glue supply unit is adapted to supply a gas glue to the gas glue output end; a filter material fixing unit fixes a filter material to the gas glue output unit; a leak detecting unit, comprising: a scanning module, providing a scanning light and moving the scanning light in a plane parallel to the filter material; when the filter material has a broken hole, the gas glue is from the broken hole Leaking to cause the scanning light to be scattered at a position corresponding to the broken hole; an image capturing unit capturing an image of the filter material; and a determining unit connected to the image capturing unit, wherein the determining unit receives the image The image and the position at which the scanning ray is scattered are judged from the image. The filter material leakage detecting device according to claim 1, wherein the scanning module moves along a first direction, and the first direction is substantially perpendicular to a transmission direction of the scanning light. The filter material leakage detecting device of claim 1, wherein the scanning module comprises: a linear displacement mechanism, moving along a first direction, wherein the first direction is substantially perpendicular to a transmission direction of the scanning light And a light source disposed on the linear displacement mechanism to provide the scanning light. The filter material leakage detecting device according to claim 1, wherein the scanning light is a laser light. The filter material leakage detecting device according to claim 1, wherein the filter material is located between the gas glue supply unit and the image capturing unit. The filter material leakage detecting device of claim 1, further comprising a displacement mechanism, wherein the image capturing unit is disposed on the displacement mechanism to adjust a relative position between the image capturing unit and the filter medium. The filter material leakage detecting device according to claim 1, wherein the plane is located between the image capturing unit and the filter medium. A filter material leakage detecting method includes: providing a gas glue to one side of a filter material; detecting, by a leak detecting unit, the filter material leaking on the other side of the filter material, and the leak detecting unit comprises: a scanning module, providing a Scanning the light and moving the scanning light in a plane parallel to the filter material. When the filter material has a broken hole, the gas gel leaks from the broken hole to cause the scanning light to be scattered at a position corresponding to the broken hole. An image capturing unit captures an image of the filter material; and a determining unit coupled to the image capturing unit, wherein the determining unit receives the image and determines a position at which the scanning light is scattered from the image. A filter material leakage detecting method comprises: providing a gas gel to one side of a filter material; providing a scanning light on the other side of the filter material and moving the scanning light on a plane parallel to the filter material, when the filter material has a When the hole is broken, the gas gel leaks from the hole to cause the scanning light to be scattered at a position corresponding to the hole; the other side of the filter material captures an image of the filter material; and the image is judged from the image The position at which the scanning ray is scattered.