KR20200142741A - Wireless vibration measuring system - Google Patents

Abstract

The present invention relates to a wireless measurement system for evaluating vibration of a ship cabin. The wireless measurement system comprises a sensor unit and a jig unit. The sensor unit senses vibration of a floor unit of a ship cabin, and the jig unit comprises a suction module tightly attached to the floor unit. The suction module comprises a body unit, an attachment unit, and a bellows. The sensor unit is installed inside the body unit, and a leak space for leaking air is formed inside the body unit. The attachment unit has an attachment surface having the same surface as the floor unit, and is fixated to be attached to and detached from a lower portion of the body unit. The bellows is fixated to an outer circumferential surface of the body unit and has an inner attachment space. The system can be fixated to be appropriate for a floor state of a ship cabin having various gradients.

Description

Wireless measurement system for vibration evaluation in ship accommodation area {WIRELESS VIBRATION MEASURING SYSTEM}

The present invention relates to a radio measurement system for vibration evaluation, and more particularly, as part of ship performance evaluation, by evaluating the vibration of the ship accommodation area where the crew or passengers are located, the level of vibration satisfies the proposed vibration limit. It relates to a radio measurement system for vibration evaluation in a ship accommodation area for convenient and reliable measurement of whether or not.

In order to be finally delivered to the shipowner after the ship is built, it is necessary to confirm that it satisfies various performances through a sea trial run. It should also be checked.

In particular, ships are constantly exposed to vibrations during voyage. Nevertheless, in the case of ship accommodation areas where sailors or passengers are located during sailing, relatively strict vibration tolerance standards are applied to ensure comfort of residence.

For the vibration evaluation of such a ship accommodation area, in the conventional case, a portable frequency analyzer (1) as shown in FIG. 1 was used, and in the case of the frequency analyzer (1), a general accelerometer (3) as in type a Alternatively, a rod-type accelerometer (4) as in type b was used.

However, in the case of a ship accommodation area, since the floor part 5 is generally covered with a cement-like deck covering, the surface has a non-magnetic property, and thus it is not possible to use an accelerometer fixing device such as a magnetic. While measuring the vibration of the bottom 5 using a frequency analyzer 1, to fix the accelerometer 3, 4 to the bottom 5, the accelerometer 3, 4 with one hand There was an inconvenience of fixing and operating the terminal 2 with the other hand.

In particular, in the case of the rod-type accelerometer 4, there is a problem in that the accuracy of the measurement is increased only when it is maintained in a vertical state on the bottom part 5, and thus usability is more difficult.

Accordingly, there is an increasing need for a device capable of evaluating vibration characteristics, which can improve usability, convenience, and accuracy in accordance with the characteristics of the vessel accommodation area as described above.

Korean Patent Registration No. 10-1262861

Accordingly, the technical problem of the present invention is conceived in this respect, and an object of the present invention is to improve the user's convenience and usability while having high reliability, and to reduce the vibration of the ship accommodation area, and It is to provide a radio measurement system for vibration evaluation in a ship accommodation area that can be fixed appropriately to the condition of the ship.

The wireless measurement system for vibration evaluation according to an embodiment for realizing the object of the present invention includes a sensor unit and a jig unit. The sensor unit senses the vibration of the bottom of the ship accommodation area, and the jig unit includes a suction module that is in close contact with the bottom. The suction module includes a body part, an attachment part, and a bellows. In the body part, the sensor unit is mounted, and an outlet space through which air is discharged is formed. The attachment portion has an attachment surface having the same surface as the bottom portion, and is fixed to the lower portion of the body portion so as to be detachable. The bellows is fixed to the outer circumferential surface of the body portion, thereby forming an attachment space therein.

In one embodiment, the jig unit may further include a pump unit connected to the outlet space to remove air from the attachment space to the outside of the suction module.

In one embodiment, as the pump unit removes air from the attachment space to the outside, the attachment surface is in close contact with the bottom portion, and the vibration of the bottom portion is directly transmitted to the sensor unit through the attachment portion and the body portion. Can be.

In one embodiment, the jig unit may further include a flow rate measuring unit that leaks air removed to the outside by an operation of the pump unit while the attachment surface is in close contact with the bottom.

In one embodiment, the attachment surface has a center opening to form an outlet space, and when the bottom portion is flat, has a flat shape, and when the bottom portion is curved, may have a curved shape having the same curvature as the bottom portion. .

In one embodiment, the suction module may further include a fixing part fixing the attachment part to the body part.

In one embodiment, the body portion may include an upper surface on which the sensor unit is mounted in close contact, and the outlet space may be formed to face a side in parallel to the upper surface.

In one embodiment, the sensor unit includes a sensing module, the sensing module, a sensor unit for measuring vibration of the bottom portion transmitted from the attachment unit and the body unit, and distortion of the low frequency region in the measured data of the sensor unit It may include a filter unit that prevents and a conversion unit that converts the signal of the measurement data.

In one embodiment, the attachment portion may be a non-magnetic material.

According to embodiments of the present invention, in measuring the vibration of the bottom of the ship accommodation area, the sensor unit vibrates the bottom while removing the air from the attachment space to the outside without manually fixing the conventional sensor unit to the bottom. Since it can be directly delivered, the user's convenience is improved, and in particular, the sensor unit can be stably positioned on the bottom of the non-magnetic body.

In this case, the body portion on which the sensor unit is mounted and the attachment portion attached to the bottom portion form a single rigid body, so that the vibration of the bottom portion is not lost and may be provided to the sensor unit as it is. It is possible to accurately evaluate the vibration.

However, since the bottom portion can form a surface having various curvatures in addition to the plane according to the measurement position, the attachment portion is configured to be detachable to conform to the shape of the bottom portion, thereby improving adhesion to the bottom portion of various shapes. So that the loss of vibration can be minimized.

In addition, as the bellows are fixed to the outer circumferential surface of the body part, when the air inside the attachment space is removed to the outside, close contact through the bellows is possible.

On the other hand, the flow rate measurement unit leaks the air removed to the outside after the suction module is in close contact with the bottom, thereby causing unnecessary vibrations to the sensor unit as air flows inside the attachment space by the operation of the additional pump unit. It is possible to minimize what is applied.

In addition, the outflow space formed inside the body part is formed to be discharged toward the side after the air is vertically raised, so that the air is discharged so as to be adjacent to the sensor unit mounted on the upper surface of the body part. It is possible to minimize the provision of additional vibrations other than the vibration of the bottom.

In particular, by driving the suction module that is in close contact with the bottom by removing air as described above, the non-magnetic attachment portion can be easily brought into close contact with the non-magnetic bottom portion, so that the vibration of the bottom portion is more convenient and Can be accurately evaluated.

1 is a schematic diagram showing a portable frequency analyzer according to the prior art.
2 is a schematic diagram showing a wireless measurement system for vibration evaluation in a ship accommodation area according to an embodiment of the present invention.
3 is a schematic view showing the jig unit of FIG. 2.
4A is a cross-sectional view illustrating a state in which the suction module of FIGS. 2 and 3 is positioned on the bottom, and FIG. 4B is a cross-sectional view illustrating a state in which the suction module is suction-fixed to the bottom.
5A is a cross-sectional view showing a state in which a suction module is located on the bottom in a wireless measurement system for vibration evaluation in a ship accommodation area according to another embodiment of the present invention, and FIG. 5B is a suction-fixed to the bottom part It is a cross-sectional view showing the state.

The present invention will be described in detail in the text, since various modifications can be made and various forms can be obtained. However, this is not intended to limit the present invention to a specific form of disclosure, it is to be understood as including all changes, equivalents, or substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals have been used for similar elements. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms.

In the present application, terms such as "comprise" or "consist of" are intended to designate the presence of features, numbers, steps, actions, elements, parts, or a combination thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of being added.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

2 is a schematic diagram showing a radio measurement system for vibration evaluation in a ship accommodation area according to an embodiment of the present invention. 3 is a schematic view showing the jig unit of FIG. 2.

2 and 3, a wireless measurement system (hereinafter referred to as a wireless measurement system) 10 for vibration evaluation in a ship accommodation area according to this embodiment includes a sensor unit 100, a jig unit 200, and It includes a terminal 300.

The sensor unit 100 senses the vibration of the bottom part 5 of the ship accommodation area, and includes a sensing module 110, a power module 120, and a wireless communication module 130.

More specifically, the sensing module 110 includes a sensor unit 111, a filter unit 112 and a conversion unit 113, and the sensor unit 111 directly senses the vibration of the bottom unit 5 It may be, for example, a 3-axis MEMS sensor.

The filter unit 112 may be, for example, an aliasing filter for preventing distortion of the low-frequency region in the vibration data of the bottom part 5 measured by the sensor unit 111. .

The conversion unit 113 converts the signal of the measurement data filtered by the filter unit 112, and may be, for example, an AD converter that converts an analog signal into a digital signal.

The power module 120 supplies power to the sensing module 110 while the sensing module 110 is operating, controls the operation of the sensing module 110, and is obtained from the sensing module 110. The vibration data of the bottom part 5 is stored.

The wireless communication module 130 performs wireless communication to provide necessary information including the stored vibration data, and may be, for example, a wireless communication module such as Bluetooth.

The sensor unit 100 is mounted on the jig unit 200 to be described later, and only the sensor unit 111 is separately mounted on the jig unit 200, and all other components are provided externally to the sensor unit 111 The measurement result of) may be provided through the wireless communication module 130 to perform data processing.

In contrast, only the sensing module 110 is separately mounted on the jig unit 200, and the power module 120 and the wireless communication module 130 are both externally provided to power the sensing module 110. It is also possible to supply or perform data communication.

Furthermore, the entire sensor unit 100 is mounted on the jig unit 200, and the vibration measurement and data processing by the sensor unit 111 are directly performed, and only the processed result is the wireless communication module 130. It can also be transmitted to the outside via.

However, in the configuration mounted on the jig unit 200, at least the sensor unit 111 is integrally formed to be in close contact with the jig unit 200, so that the bottom portion provided through the jig unit 200 The vibration of (5) must be transmitted without loss.

Hereinafter, for convenience of description, it will be described as an example that the sensor unit 100 is mounted on the jig unit 200.

The jig unit 200 mounts and fixes the sensor unit 100, and transmits the vibration of the bottom part 5 to the sensor unit 100 without loss of vibration, and the suction module 400, the pump It includes a unit 210, a flow rate measurement unit 220 and a battery 230.

The suction module 400 has a shape and structure as shown in FIG. 3, and a detailed configuration will be described with reference to the drawings to be described later.

The suction module 400 is adsorbed and fixed to the bottom part 5, the sensor unit 100 is mounted on the upper part, and the pump part 210 and the flow rate measuring part 220 are connected.

The pump unit 210 is connected through the suction module 400 and the pump line 211, and removes air from the attachment space formed inside the suction module 400 to the outside, thereby vacuuming the attachment space. In this state, the suction module 400 is in close contact with the bottom part 5.

In this case, as shown in FIG. 3, the air removed through the pump unit 210 is removed to the outside 212, through which the attachment space becomes a vacuum state.

The flow rate measurement unit 220 is connected to the pump line 211 and measures the pressure of air or the flow rate of air that is removed to the outside through the pump unit 210. Thus, it is possible to monitor the state of the air removed through the pump line 211.

In this embodiment, in the pump unit 210, the air in the attachment space is completely discharged to the outside, so that the inside of the suction module 400 is in a vacuum state, or the suction module 400 is in the bottom part 5 ), it must be operated to stop the operation or to remove only the minimum air for maintaining the vacuum state.

However, the actual pump unit 210 has a limitation in performing precise control, so that the air inside the suction module 400 is unnecessarily removed even in a situation in which the operation should be stopped or only the minimum operation should be performed. It can be operated to remove excess.

In this way, when the pump unit 210 is excessively operated, vibration may be additionally provided to the suction module 400 by the operation of the pump unit 210, and the generation of such vibration may be caused by the sensor unit It may be an error factor in vibration measurement for the bottom part 5 of (100).

Accordingly, the flow rate measurement unit 220 is connected to the pump line 211 to measure and monitor the pressure or flow rate of the air removed to the outside, and the inside of the suction module 400 is vacuum When the pump unit 210 is in a state or when the pump unit 210 performs an unnecessary operation even when the suction module 400 is in close contact with the bottom unit 5, this may be controlled.

That is, when an unnecessary operation of the pump unit 210 is performed as described above, and excessive air is removed to the outside, the flow rate measurement unit 220 uses the valve unit 221 connected to the pump line 211 It is opened to leak air removed to the pump line 211.

Thus, even if the pump unit 210 is continuously operated unnecessarily, in a state in which the suction module 400 is stably in close contact with the bottom portion 5, air in the attachment space is not additionally removed, and the The pressure of the pump line 211 may be controlled through the valve part 221, through which the state of removing excess air according to the operation of the pump part 210 may be controlled.

The battery 230 is connected to the pump unit 210 and supplies power for the operation of the pump unit 210.

The terminal 300 is connected to the jig unit 200 and the sensor unit 100 to display the vibration measurement result of the bottom part 5 measured by the sensor unit 100, or the jig unit ( A control module for controlling 200) is provided, and status information of the jig unit 200 is displayed to the outside.

Thus, the user controls the wireless measurement system 10 through the terminal 300 and can check the required result.

Meanwhile, in the case of the present embodiment, the terminal 300 may be a terminal such as a smart phone or a tablet PC, and the wireless measurement system 10 is controlled on the terminal 300 and the result can be checked. The program may be executed in the form of an APP.

In this case, the vibration measurement result can be post-processed through the app, for example, by applying the correction coefficient for each frequency suggested in ISO 6954 (2000) to the transmitted vibration signal in the time domain, and calculating it as a final value, It can be compared with the vibration tolerance of ISO 6954 (2000) or ISO 20283-5 (2016) to indicate whether or not they are satisfied.

Thus, the user can easily control the wireless measurement system 10 or process data through the app, thereby improving convenience in use.

In particular, in the conventional measurement system, it was impossible to change or add the programmed control program, but if the control program is executed in the form of the above app, control according to the user or use environment, such as changing the control algorithm or adding a new filter. Since the program can be changed, the openness of the program can also be improved.

Hereinafter, the suction module 400 will be described in more detail.

4A is a cross-sectional view illustrating a state in which the suction module of FIGS. 2 and 3 is positioned on the bottom, and FIG. 4B is a cross-sectional view illustrating a state in which the suction module is suction-fixed to the bottom.

4A and 4B, the suction module 400 includes a body part 410, an attachment part 420, a fixing part 430, and a bellows 440.

The body portion 410 is formed to have a single block shape, and is connected to the first outlet space 411 and the first outlet space 411 extending in a vertical direction therein, and a second outlet space 411 extending in the horizontal direction. Outflow space 412 is formed.

The sensor unit 100 is mounted on the upper surface 413 of the body part 410, and the bottom surface of the sensor unit 100 is fixed to be in close contact with the upper surface 413. Thus, the vibration transmitted to the body portion 410 is not lost and may be transmitted to the sensor unit 100 as it is.

In addition, the body portion 410 may also be a block formed integrally to minimize the loss of vibration, and for fixing the bellows 440 to be described later, the side surface may be formed to form a step.

In addition, through the first outlet space 411 and the second outlet space 412, the air existing in the attachment space 441 is discharged to the outside, and the second outlet space 412 Is connected to the pump line 211.

In this case, the first outlet space 411 extends in a vertical direction so as to be formed with the shortest distance for outflowing the air from the attachment space 441, but the second outlet space 412 is the upper surface 413 In consideration of the sensor unit 100 mounted on ), it extends in the horizontal direction.

In addition, as the second outlet space 412 extends in a horizontal direction and is formed to have a predetermined distance from the upper surface 413 as shown, air flowing out along the second outlet space 412 As a result, vibration provided to the sensor unit 100 can be minimized.

The attachment portion 420 is attached to the lower surface of the body portion 410, and the attachment portion 420 is fixed to the lower surface of the body portion 410 by the fixing portion 430.

In this case, a predetermined space must be formed so that the first outlet space 411 extends, as well as the attachment portion 420, and the air in the attachment space 441 is It may leak to the outside.

The fixing part 430 may be, for example, a fixing screw.

Meanwhile, in this embodiment, the attachment portion 420 is in close contact with the bottom portion 5, and the attachment surface 425 of the attachment portion 420 is the same as the shape of the surface of the bottom portion 5 Must be formed.

In general, since the bottom part 5 of the ship accommodation area is covered with a cement-like deck covering, it has a non-magnetic property, and may generally have a flat shape.

Accordingly, as shown in the attachment surface 425 as well, when the surface of the bottom portion 5 has a planar shape, it may have a planar shape corresponding to the planar shape.

Of course, the bottom portion 5 is difficult to be formed in a completely flat state without unevenness, so the material of the attachment surface 425 must be formed of a relatively soft material for complete contact with the bottom portion 5 . However, in the case of the present embodiment, the vibration generated in the bottom part 5 between the gaps is not lost, and should be provided to the sensor unit 100 through the attachment part 420 and the body part 410, the The attachment surface 425 should not be formed of a soft material or the like.

That is, the attachment portion 420 must be formed in an integral block shape as a whole, including the attachment surface 425, and through this, the sensor unit ( 100).

On the other hand, since the bottom part 5 has a non-magnetic property, it is sufficient that the attachment surface 425 is also a non-magnetic material.

However, even if both the bottom portion 5 and the attachment surface 425 are formed in a flat surface, a fine gap exists between the bottom portion 5 and the attachment surface 425, and in such a gap Accordingly, it is difficult to maintain the attachment space 441 in a vacuum state.

Thus, in this embodiment, the air in the attachment space 441 is removed to the outside, so that the attachment space 441 is maintained in a pressure state below a certain level, and the attachment surface 425 is placed on the bottom part 5. ), the pump unit 210 is continuously operated so that air is supplied back to the attachment space 441 through the minute gap between the bottom portion 5 and the attachment surface 425 It can be prevented in advance from falling in the adhesion state.

The bellows 440 is fixed along the outer circumferential surface of the body portion 410 and forms the attachment space 441 therein.

The bellows 440, as shown, is formed of a flexible material with a corrugated side portion.

In this case, the lower end of the bellows 440 is located on the bottom part 5, and the bellows 440 is made of a flexible material, so it is deformed to conform to the shape of the bottom part 5 and is A predetermined sealed attachment space 441 is formed.

In this embodiment, as shown in FIG. 4A, in a state in which the end of the bellows 440 is located on the bottom part 5 and the attachment space 441 is formed therein, the pump part 210 is By operating, air in the attachment space 441 is removed through the first and second outlet spaces 411 and 412.

Thus, when the air inside the attachment space 441 is removed, as shown in FIG. 4B, the bellows 440 is in close contact with the side surfaces of the body portion 410 and the attachment portion 420, and the The attachment surface 425 is positioned in close contact with the bottom part 5.

Thus, the bottom part 5 is integrally formed with the attachment part 420, the body part 410, and the sensor unit 100 to form a so-called rigid body. Vibration is minimized and is transmitted to the sensor unit 100, and the sensor unit 100 measures the vibration of the bottom part 5.

In this case, as described above, a predetermined gap may be formed in the attachment surface 425 and the bottom portion 5, but the air in the attachment space 441 is continuously supplied by the pump unit 210. Since it can be removed by suction, the attachment surface 425 and the bottom part 5 can be kept in close contact.

5A is a cross-sectional view showing a state in which a suction module is located on the bottom in a wireless measurement system for vibration evaluation in a ship accommodation area according to another embodiment of the present invention, and FIG. 5B is a suction-fixed to the bottom part of the suction module. It is a cross-sectional view showing the state.

In the wireless measurement system in this embodiment, except that the attachment surface 426 of the suction module 401 is formed in a curved surface, it is the same as the wireless measurement system 10 described with reference to FIGS. 2 to 4B. , For the same components, the same reference numerals are used, and duplicate descriptions are omitted.

Referring to FIG. 5A, in the suction module 401, the attachment surface 426 may be formed as a concave curved surface.

In order to be in close contact with the bottom portion 6, the attachment portion 421 may be detachable in consideration of the shape of the bottom portion 6, and as in this embodiment, the bottom portion 6 protrudes convexly. If formed in a curved surface, the attachment surface 426 is replaced with an attachment portion 421 having a concave-concave curved shape, and must be fixed to the body portion 410.

That is, as shown, the attachment portion 421 in which the attachment surface 426 having a concave curved shape is formed is fixed to the lower surface of the body portion 410 by the fixing portion 431, in this case, the attachment portion It has already been described that 421 and the fixing part 431 form a space in which the space is aligned with the outlet space.

In this way, while the attachment portion 421 having a curved shape so as to be in close contact with the bottom portion 6 is fixed to the body portion 410, air in the attachment space 441 is removed to the outside. 5B, the bellows 440 comes in close contact with the side surfaces of the body portion 410 and the attachment portion 421, and accordingly, the attachment surface 426 is also the bottom portion ( 6) comes in close contact.

Thus, the bottom portion 5, the attachment portion 421, the body portion 410, and the sensor unit 100 are integrally contacted like a so-called rigid body, and the vibration of the bottom portion 6 is eliminated. It can be effectively transmitted to the sensor unit 100 without.

On the other hand, although not shown, the attachment portion may have various shapes matching the shape of the bottom portion, and by assembling and fixing to the body portion 410 by selecting an attachment portion matching the shape of the bottom portion, the Regardless of the shape of the bottom portion, it is possible to closely contact the bottom portion, through which vibration provided from the bottom portion is minimized and may be transmitted to the sensor unit 100.

According to the embodiments of the present invention as described above, in measuring the vibration of the bottom of the ship accommodation area, the conventional sensor unit is not directly fixed to the bottom, but the sensor unit is removed while removing air from the attachment space to the outside. Since the vibration of the bottom portion can be directly transmitted, user convenience is improved, and in particular, the sensor unit can be stably positioned on the bottom portion, which is non-magnetic.

In this case, the body portion on which the sensor unit is mounted and the attachment portion attached to the bottom portion form a single rigid body, so that the vibration of the bottom portion is not lost and may be provided to the sensor unit as it is. It is possible to accurately evaluate the vibration.

However, since the bottom portion can form a surface having various curvatures in addition to the plane according to the measurement position, the attachment portion is configured to be detachable to conform to the shape of the bottom portion, thereby improving adhesion to the bottom portion of various shapes. So that the loss of vibration can be minimized.

Further, as the bellows are fixed to the outer circumferential surface of the body part, when the air inside the attachment space is removed to the outside, close contact through the bellows is possible.

On the other hand, the flow rate measurement unit leaks the air removed to the outside after the suction module is in close contact with the bottom, thereby causing unnecessary vibrations to the sensor unit as air flows inside the attachment space by the operation of the additional pump unit. It is possible to minimize what is applied.

In addition, the outflow space formed inside the body part is formed to be discharged toward the side after the air is vertically raised, so that the air is discharged so as to be adjacent to the sensor unit mounted on the upper surface of the body part. It is possible to minimize the provision of additional vibrations other than the vibration of the bottom.

In particular, by driving the suction module that is in close contact with the bottom by removing air as described above, the non-magnetic attachment portion can be easily brought into close contact with the non-magnetic bottom portion, so that the vibration of the bottom portion is more convenient and Can be accurately evaluated.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the present invention described in the following claims. You will understand that you can.

10: wireless measurement system 100: sensor unit
110: sensing module 200: jig unit
210: pump unit 220: flow measurement unit
300: terminal 400, 401: suction module
410: body part 420, 421: attachment part
430, 431: fixing part 440: bellows
441: attachment space

Claims (9)

A sensor unit for sensing the vibration of the bottom of the ship accommodation area; And
Including a jig unit including a suction module in close contact with the bottom,
The suction module,
A body portion on which the sensor unit is mounted, and an outlet space through which air is discharged;
An attachment portion formed with an attachment surface having the same surface as the bottom portion, and fixed detachably to a lower portion of the body portion; And
And a bellows fixed to the outer circumferential surface of the body and forming an attachment space therein. The method of claim 1, wherein the jig unit,
And a pump connected to the outlet space to remove air from the attachment space to the outside of the suction module. The method of claim 2,
As the pump unit removes air from the attachment space to the outside,
The attachment surface is in close contact with the bottom portion, and the vibration of the bottom portion is directly transmitted to the sensor unit through the attachment portion and the body portion. The method of claim 3, wherein the jig unit,
And a flow rate measurement unit for leaking air removed to the outside by an operation of the pump unit while the attachment surface is in close contact with the bottom unit. The method of claim 1, wherein the attachment surface,
The center is opened to form an outflow space,
When the bottom portion is flat, it has a flat shape,
Wireless measurement system, characterized in that the bottom portion has a curved shape having the same curvature as that of the bottom portion when the bottom portion is curved. The method of claim 5, wherein the suction module,
And a fixing part fixing the attachment part to the body part. The method of claim 1, wherein the body portion,
It includes an upper surface on which the sensor unit is closely attached and mounted,
The outflow space is a wireless measurement system, characterized in that formed to face the side parallel to the upper surface. The method of claim 1,
The sensor unit includes a sensing module,
The sensing module,
A sensor unit for measuring the vibration of the bottom unit transmitted from the attachment unit and the body unit;
A filter unit for preventing distortion of a low frequency region in the measurement data of the sensor unit; And
And a converter for converting the signal of the measurement data. The method of claim 1,
The wireless measurement system, characterized in that the attachment portion is non-magnetic.

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