KR101543383B1 - Method for detecting abnormal status of bearing applied to radar USING SENSOR - Google Patents

Abstract

A method for detecting a bearing abnormality of a radar using a sensor is disclosed. A method of detecting a bearing abnormality of a radar according to an embodiment of the present invention includes receiving vibration data of the bearing generated by rotation of the radar measured by a first sensor attached to a bearing of a radar; Comparing the received vibration data with predetermined reference vibration data; And determining that the bearing is abnormal if the received vibration data is greater than or equal to the reference vibration data.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for detecting a bearing abnormality of a radar using a sensor,

The present invention relates to a bearing abnormality detection, and more particularly, to a method for detecting a bearing abnormality of a radar which can easily detect abnormality of a bearing used in a radar using a sensor.

The bearings used in general radar are always running because they are operated without interruption.

Such continuous rotation causes continuous vibration and noise in the bearing, which may cause an abnormal condition in the bearing. Therefore, it should be possible to repair and inspect the bearing immediately when an abnormal condition or problem occurs.

Conventional radar bearing checking method was a method of directly attaching a vibration acceleration sensor and verifying the data of the vibration acceleration sensor using a data storage device near the radar and using a microphone near the radar for noise measurement It was confirmed by a person's direct measurement method.

However, the conventional vibration and noise measurement method is a method in which a person manually connects a sensor and analyzes the data with a computer or a notebook through a data storage device connected with a long sensor cable. there is a need for setting and measurement. In addition, since it is impossible to check the state of the bearings in real time, there is a limit that can not be coped with immediately when a noise and vibration problem occurs.

Therefore, there is a need for a method of immediately recognizing that the operator has an abnormality in the bearing when noise and vibration problems occur in the bearing.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide a method for detecting a bearing abnormality of a radar using a sensor capable of instantly detecting an abnormality of a bearing used in a radar .

More particularly, the present invention relates to a radar sensor for receiving output data of a vibration sensor and a noise sensor for detecting vibrations and noise generated in a bearing of a radar through wireless communication, comparing the received data with predetermined reference vibration / noise data The present invention provides a method for detecting a bearing abnormality of a radar using a sensor capable of instantly determining whether or not an abnormality exists in a bearing.

However, the objects of the present invention are not limited to those mentioned above, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to one aspect of the present invention, there is provided a method for detecting a bearing abnormality of a radar device, the method comprising: detecting a vibration of the bearing, which is generated by rotation of the radar device measured by a first sensor attached to a bearing of the radar device; Receiving data; Comparing the received vibration data with predetermined reference vibration data; And determining that the bearing is abnormal if the received vibration data is greater than or equal to the reference vibration data.

Preferably, the receiving step receives noise data measured by a second sensor attached to the bearing, and the comparing step compares the received noise data with predetermined reference noise data, And determines that the bearing is abnormal when the received noise data is greater than or equal to the reference noise data.

Preferably, the determining step determines that the bearing is abnormal when the received vibration data is equal to or greater than the reference vibration data and the received noise data is equal to or greater than the reference noise data.

Preferably, the determining step determines that there is an abnormality in the bearing when the received vibration data is greater than or equal to the reference vibration data by a predetermined number of times.

Preferably, the determining step may include calculating a similarity between the pattern of the received vibration data and the reference vibration data pattern, comparing the calculated similarity with a predetermined reference similarity, comparing the calculated similarity with a predetermined reference similarity, The controller determines that there is an abnormality in the bearing.

According to another aspect of the present invention, there is provided a method for detecting an abnormality in a bearing of a radar device, the method comprising the steps of: displaying a notification of abnormality of the bearing on a screen or outputting it through a speaker, do.

According to another aspect of the present invention, there is provided a method for detecting a bearing abnormality of a radar, comprising the steps of: detecting vibration data of the bearing generated when the radar, measured by a first sensor attached to a bearing of the radar, Receiving; Comparing the received vibration data with predetermined reference vibration data and determining whether the bearing is abnormal as a result of the comparison; And the detecting device may provide the mobile terminal with a notification of the bearing abnormality.

Preferably, the receiving step receives noise data measured by a second sensor attached to the bearing, and the determining step comprises comparing the received noise data with predetermined reference noise data, If the received noise data is greater than or equal to the reference noise data, it is determined that the bearing is abnormal.

Preferably, the determining step determines that the bearing is abnormal when the received vibration data is equal to or greater than the reference vibration data and the received noise data is equal to or greater than the reference noise data.

Preferably, the determining step determines that there is an abnormality in the bearing when the received vibration data is greater than or equal to the reference vibration data by a predetermined number of times.

Preferably, the determining step may include calculating a similarity between the pattern of the received vibration data and the reference vibration data pattern, comparing the calculated similarity with a predetermined reference similarity, comparing the calculated similarity with a predetermined reference similarity, The controller determines that there is an abnormality in the bearing.

According to the present invention, a vibration sensor and a noise sensor for detecting vibrations and noise generated in a bearing of a radar are attached to a bearing, and output data of the sensors are received through wireless communication. In addition, it can avoid the hassle of attaching complicated measuring instruments and sensors, and can analyze and confirm the vibration / noise data of the bearings in real time.

In other words, the present invention can confirm the vibration / noise problem of the bearing in real time, so that the bearing can be checked and the vibration / noise problem can be solved before the vibration / noise problem of the bearing accumulates, You can prevent large accidents in advance.

Further, in the present invention, when it is determined that a problem has occurred in the bearing of the radar, the operator can be notified of the abnormal state of the bearing to the portable terminal of the operator so that the operator can immediately recognize the abnormal state of the bearing.

Furthermore, since the present invention can confirm the state of the bearings in real time on the portable terminal of the operator, it is possible to thoroughly contrast the places without limit.

1 shows a system configuration of an embodiment for explaining the present invention.
2 shows a configuration of a radar bearing abnormality detecting apparatus according to an embodiment of the present invention.
3 is a flowchart illustrating a method of detecting a bearing abnormality in a radar according to an embodiment of the present invention.
FIG. 4 shows an operational flow diagram of an embodiment of step S330 shown in FIG.
FIG. 5 shows an operational flow diagram of another embodiment of step S330 shown in FIG.
6 shows an example of an attachment position of the acceleration sensor and the noise sensor.
FIG. 7 shows an example graph of acceleration data over time.

Hereinafter, a method for detecting a bearing abnormality of a radar using a sensor according to an embodiment of the present invention will be described with reference to the accompanying drawings. The present invention will be described in detail with reference to the portions necessary for understanding the operation and operation according to the present invention.

In describing the constituent elements of the present invention, the same reference numerals may be given to constituent elements having the same name, and the same reference numerals may be given thereto even though they are different from each other. However, even in such a case, it does not mean that the corresponding component has different functions according to the embodiment, or does not mean that the different components have the same function. It should be judged based on the description of each component in the example.

Particularly, the present invention relates to a radar apparatus and a radar apparatus, in which a sensor for sensing the vibration and noise of a bearing is attached to a bearing used in a radar, and a portable terminal such as a smart phone or a radar operation room It is necessary to confirm the noise and vibration condition of the bearing or to check the abnormal condition of the bearing.

Therefore, the present invention has the advantage that the mechanic always needs to check the noise and vibration generated by the inside of the bearing due to the operation of the radar, and it can cope with the problem immediately when an abnormality occurs in the bearing.

1 shows a system configuration of an embodiment for explaining the present invention.

As shown in FIG. 1, the system includes a radar 100, a bearing abnormality detecting device 200, and a portable terminal 300.

The radar 100 includes a bearing. The bearing includes a first sensor that measures or senses vibration data and noise data of the bearing, and transmits the vibration data to the bearing abnormality detecting device 200 via Bluetooth, for example, A second sensor is attached. Of course, the sensor attached to the bearing is not limited to the first sensor and the second sensor, and may include at least two or more sensors as required.

The vibration data and the noise data of the bearing measured by the first sensor and the second sensor are transmitted to the bearing abnormality detecting device 200 in real time.

Here, the first sensor may be a vibration sensor for sensing the vibration of the bearing, for example, may include an acceleration sensor, and the second sensor may be a noise measurement sensor for sensing the noise of the bearing. For example, And an acoustic microphone sensor.

In this case, an acceleration sensor capable of measuring the amount of vibration and a noise sensor capable of measuring noise can be used to accurately measure the noise of bearings such as irregular continuous water gun noise from the inside of the bearing noise , A total of 16 sensors can be attached to the bearing ring around the position of the loading plug. The reason for concentrating on this part is that in the case of the cross roller bearing (Slew Bearing), the part where the roller and the internal parts are inserted is the part of the loading plug, and since the roller discontinuity part inside the bearing may be formed on this surface, Larger noise / vibration can be generated, and the vibration / noise amount of noise such as irregular and continuous sound of a double gun can be analyzed precisely.

The bearing abnormality detecting device (200) receives from at least one sensor attached to the bearing. It is possible to detect or determine the presence or absence of an abnormal state of the bearing by using the vibration data of the bearing and the noise data and to provide notification of the bearing abnormality to the portable terminal 300 of the operator, You can also display notifications on the screen or output them through the speakers.

Here, at least one of the portable terminals 300 of the operator who wants to receive the notification of bearing abnormality may be at least one. That is, if there are several operators, the mobile terminal for all operators provides notification of bearing abnormality.

The bearing abnormality detecting apparatus according to the present invention will now be described with reference to FIG.

2 shows a configuration of a radar bearing abnormality detecting apparatus according to an embodiment of the present invention.

2, a bearing abnormality detecting apparatus 200 according to the present invention includes a receiving unit 210, a comparing unit 220, a determining unit 230, and a providing unit 240. The comparing unit 220, the determining unit 230, and the providing unit 240 may be implemented by a computer, for example, a receiver 210, a comparing unit 220, a determining unit 230, And may be implemented in at least one processor.

The receiving unit 210 receives the vibration data and noise data of the bearing generated by the radar measured by the first sensor attached to the bearing of the radar and the second sensor from the radar.

At this time, the receiving unit 210 can receive the vibration data and the noise data of the bearing from the radar through the wireless communication, and the vibration data and the noise data of the bearing thus received are continuously stored in the data storage device or the radar operating computer And can output a graph related to this in real time on a radar operating computer.

The comparing unit 220 compares the vibration data received through the receiving unit 210 with predetermined reference vibration data, and compares the noise data received through the receiving unit 210 with predetermined reference noise data.

Here, the reference vibration data and the reference noise data may be values determined by the operator, the vibration data may be the Grms value, and the noise data may be the decibel (dB) value.

Grms is the unit of gravity acceleration G and rms of the root mean square, which is the average value of the acceleration when the acceleration changes with time. The root mean square is the mean square of the acceleration and the square root again to be.

That is, the comparator 220 compares the vibration data with the reference vibration data and the noise data with the reference noise data to check whether the bearing is abnormal.

The vibration data of the bearing continuously stores the data at intervals of one minute and automatically selects the data of 10 seconds of the interval having the highest G peak value for the efficient result data processing as shown in the example of FIG. The G data of the section is converted into the Grms value, and it can be a value multiplied by the weight factor 1.2 so that it can be measured and measured up to the minute vibration.

At this time, the vibration data converted to the Grms value can be expressed as shown in Equation (1) below.

[Equation 1]

여기서, x는 랜덤 변수(random variable) 또는 가속도 G 값의 무작위 변수를 나타내며, p(x)는 랜덤 변수의 함수 또는 가속도 G 값의 무작위 변수의 함수를 나타낸다.

Where x represents a random variable of a random variable or an acceleration G value, and p (x) represents a function of a random variable of a random variable or an acceleration G value.

The noise data of the bearing measured in real time can be obtained by converting the sound pressure level (SPL) to the sound power level (PWL or SWL) through the following Equation (2) This is because the noise level is measured at a place including the background noise or the ambient noise of the radar operating environment, and therefore, it is determined that the noise value is slightly lower than the actual value.

&Quot; (2) "

여기서, Lw는 SWL(Sound Power Level)을 나타내고, Lp는 SPL(Sound Pressure Level)을 나타내며, Q는 지향계수를 나타내며, r은 음원으로부터 측정지점까지의 거리를 나타낸다.

Here, Lw represents the SWL (Sound Power Level), Lp represents the SPL (Sound Pressure Level), Q represents the directivity coefficient, and r represents the distance from the sound source to the measurement point.

The determination unit 230 is configured to determine whether or not the bearing is abnormal by using the comparison result by the comparison unit 220. If the vibration data of the bearing is equal to or greater than the reference vibration data or the noise data is equal to or greater than the reference noise data, .

Further, the determination unit 230 may determine that there is an abnormality in the bearing when the received vibration data is equal to or greater than the reference vibration data, or when the received noise data is equal to or greater than the reference noise data, .

Furthermore, the determination unit 230 may determine whether the bearing is abnormal by using a vibration data pattern, a noise data pattern, or the like, not only by determining whether the bearing is abnormal, by comparing vibration data or noise data values . For example, when the vibration data pattern received in real time is determined to be similar to the predetermined reference vibration data pattern or the noise data pattern received in real time is determined to be similar to the predetermined reference noise data pattern, It can be determined that there is an abnormality in the bearing when the similarity degree of the data pattern is equal to or more than a predetermined value. That is, the determination unit 230 may calculate the degree of similarity between the vibration data pattern and the reference vibration data pattern, determine that there is an abnormality in the bearing when the degree of similarity is equal to or greater than a predetermined value, And it can be judged that there is an abnormality in the bearing when the similarity degree is more than a predetermined value. Of course, the determination unit 230 may determine that there is an abnormality in the bearing only when both degrees of similarity are equal to or greater than a predetermined value. The determination of whether or not the bearing is abnormal based on the similarity may be performed when the vibration data and the noise data are equal to or greater than the reference vibration data and the reference noise data, It may be performed irrespective of the type.

Here, the reference vibration data pattern and the reference noise data pattern may be a previously stored pattern, which may be a data pattern that may be generated when an abnormality occurs in the bearing.

The similarity calculation in the present invention can use any method capable of calculating the degree of similarity between patterns, and those skilled in the art can easily use it.

If it is determined that there is an abnormality in the bearing as a result of the determination by the determination unit 230, the providing unit 240 provides a notification of the bearing abnormality. If it is determined that there is an abnormality in the bearing, Of the above.

At this time, the providing unit 240 provides the vibration data of the bearing and the noise data to the portable terminal by notifying the operator of the abnormality of the bearing provided by the operator, The vibration data and the noise data of the bearing can be checked at the terminal.

Also, if it is determined by the determination unit 230 that there is an abnormality in the bearing, the providing unit 240 displays the notification of the abnormality of the bearing on the screen or outputs it through the speaker.

As described above, the apparatus according to the present invention attaches a vibration detection sensor and a noise detection sensor for detecting vibration and noise generated in a bearing of a radar to a bearing, and receives output data of the sensors through wireless communication, It can avoid the hassle of attaching complicated measuring instruments and sensors for vibration measurement and can analyze and confirm vibration / noise data of bearings in real time.

Accordingly, the present invention can check the bearings and solve the vibration / noise problem before the vibration / noise problem of the bearings accumulates, thereby preventing a large accident that may be caused by the bearing problem.

Further, in the present invention, when it is determined that a problem has occurred in the bearing of the radar, the operator is notified of the abnormal state of the bearing to the portable terminal of the operator so that the operator can immediately recognize the abnormal state of the bearing, Since the state of the bearings can be checked in real time on the terminal, it is possible to thoroughly contrast the place without limit.

3 is a flowchart illustrating a method of detecting a bearing abnormality in a radar according to an embodiment of the present invention.

Referring to FIG. 3, the method according to the present invention receives vibration data and noise data of a bearing attached to a radar in real time while the radar rotates continuously (S310).

At this time, in step S310, vibration data and noise data of the bearing sensed by the vibration detection sensor and the noise measurement sensor attached to the bearing can be received via wireless communication, for example, Bluetooth.

The vibration data and the noise data received in step S310 may be stored in real time in the data storage device or in separate storage means.

When the vibration data and the noise data of the bearing are received in real time in step S310, the received vibration data is compared with predetermined reference vibration data to compare the vibration data with the reference vibration data or the received noise data with predetermined reference noise data It is determined whether the noise data is equal to or greater than the reference noise data (S320).

If it is determined in step S320 that the vibration data is equal to or greater than the reference vibration data or the noise data is equal to or greater than the reference noise data, it is determined that there is an abnormality in the bearing (S330).

That is, in step S330, it is determined that an abnormality has occurred in the bearing when the vibration data of the bearing is equal to or greater than the reference vibration data or when the noise data is equal to or greater than the reference noise data.

Here, the reference vibration data and the reference noise data may be values determined by the operator operating the radar, the vibration data may be the Grms value, and the noise data may be the decibel (dB) value.

Further, in step S330, it may be determined that there is an abnormality in the bearing when the received vibration data is equal to or greater than the reference vibration data or when the received noise data is equal to or greater than the reference noise data. Referring to FIG. 4, the following will be described.

FIG. 4 is a flowchart illustrating the operation of step S330 shown in FIG. 3. FIG. 4 illustrates a case in which it is determined that there is an abnormality in the bearing when the vibration data is equal to or greater than the reference vibration data.

As shown in FIG. 4, the step S330 of determining that there is an abnormality in the bearing determines whether the vibration data of the received bearing is greater than or equal to the reference vibration data (S410).

If it is determined in step S410 that the vibration data is greater than or equal to the reference vibration data, it is determined that there is an abnormality in the bearing.

Of course, even if the number of times that the vibration data is equal to or greater than the reference vibration data is less than a predetermined number of times, it is possible that the vibration data notifies the operator of the notification of the abnormality of the reference vibration data.

Step S330 may also determine that the bearing is abnormal when the received vibration data is greater than or equal to the reference vibration data and the vibration data pattern or noise data pattern is similar to the reference vibration data pattern or noise data pattern, 5 will be described as follows.

FIG. 5 shows an operational flow chart of another embodiment of step S330 shown in FIG. 3, in which it is determined that there is an abnormality in the bearing when the vibration data pattern is similar to the reference vibration data pattern.

5, it is determined whether the vibration data pattern received in real time is similar to the predetermined reference vibration data pattern (S510).

Here, the reference vibration data pattern may be a previously stored pattern, which may be a data pattern that may be generated when an abnormality occurs in the bearing.

At this time, in step S510, the similarity degree between the vibration data pattern and the reference vibration data pattern is calculated, and the calculated similarity degree is compared with the predetermined reference similarity degree to determine whether the calculated similarity degree is equal to or greater than the reference similarity degree.

If it is determined in step S510 that the vibration data pattern is similar to the reference vibration data pattern, that is, if the calculated pattern similarity is greater than or equal to the predetermined reference similarity degree, it is determined that there is an abnormality in the bearing. Otherwise, The process is suspended and the process returns to step S310 (S520).

Referring again to FIG. 3, if it is determined in step S330 that there is an abnormality in the bearing, a notice of bearing abnormality is provided to the portable terminal of the operator in advance (S340).

At this time, in step S340, the notification about the abnormality of the bearing provided to the portable terminal is provided by including the vibration data of the bearing and the noise data directly by the operator, The vibration data and the noise data of the vehicle can be confirmed.

If it is determined that there is an abnormality in the bearing, a notification about the abnormality of the bearing is displayed on the screen or outputted through the speaker (S350).

In addition, although not shown, by receiving data analyzed by a bearing abnormality detecting device, for example, a radar operating computer, or by connecting to a working computer, the operator, mechanic, and user directly monitor You may.

If it is judged that there is an abnormality in the bearing of the radar, the operator or mechanic suspects that there is a problem with the bearing, and if the time is not overcome, it is possible to judge whether the emergency operation is interrupted and whether or not the bearing is checked. It is possible to stop the rear radar and perform the bearing check to judge the abnormality.

The method according to the present invention is advantageous in that it is possible to thoroughly contrast the location of the bearings because the mechanic or the operator can check the state of the bearings in real time on the smartphone even when the maintenance mechanic or the operator is outside the military base , Real-time vibration / noise of bearings can be confirmed. Therefore, it is possible to check the bearings in advance and prevent large accidents before they accumulate due to problems.

It is to be understood that the present invention is not limited to these embodiments, and all of the elements constituting the embodiments of the present invention described above may be combined or operated in one operation. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. In addition, although all of the components may be implemented as one independent hardware, some or all of the components may be selectively combined to perform a part or all of the functions in one or a plurality of hardware. As shown in FIG. In addition, such a computer program may be stored in a computer-readable medium such as a USB memory, a CD disk, a flash memory, etc., and read and executed by a computer to implement embodiments of the present invention. As the storage medium of the computer program, a magnetic recording medium, an optical recording medium, a carrier wave medium, or the like may be included.

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 essential characteristics thereof. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: Radar
200: Bearing abnormality detection device
300: portable terminal

Claims (12)

Receiving vibration data of the bearing generated by the rotation of the radar (100) measured by a first sensor attached to a bearing of the radar (100);
Comparing the received vibration data with predetermined reference vibration data; And
Determining that the bearing is abnormal if the received vibration data is greater than or equal to the reference vibration data;
Wherein the first sensor is attached to the periphery of a loading plug for inserting a roller and an inner part of a bearing inner ring of the radar 100,
Wherein the vibration data is a Grms value,

Wherein x represents a random variable, and p (x) represents a function of a random variable. The method according to claim 1,
Wherein the receiving comprises:
Receiving noise data measured by a second sensor attached to the bearing,
The step of comparing
Comparing the received noise data with predetermined reference noise data,
The determining step
If the received noise data is greater than or equal to the reference noise data, determining that the bearing is abnormal. 3. The method of claim 2,
Wherein the determining step comprises:
And determining that there is an abnormality in the bearing when the received vibration data is equal to or greater than the reference vibration data and the received noise data is equal to or greater than the reference noise data. The method according to claim 1,
Wherein the determining step comprises:
And determining that there is an abnormality in the bearing when the received vibration data is greater than or equal to the reference vibration data by a predetermined number of times. The method according to claim 1,
Wherein the determining step comprises:
Calculating a similarity between the pattern of the received vibration data and the reference vibration data pattern,
Comparing the calculated similarity with a predetermined reference similarity, and determining that there is an abnormality in the bearing when the calculated similarity is equal to or greater than the reference similarity. The method according to claim 1,
Displaying a notice on the abnormality of the bearing on a screen or outputting it through a speaker if it is determined that the bearing is abnormal;
Further comprising the step of: detecting a bearing of the radar. Transmitting vibration data of the bearing generated by rotation of the radar measured by a first sensor attached to a bearing of the radar;
Comparing the vibration data received from the radar device (100) with predetermined reference vibration data and determining whether the bearing is abnormal as a result of the comparison; And
The portable terminal (300) receiving a notification of the bearing abnormality from the detecting device (200);
Wherein the first sensor is attached to the periphery of a loading plug for inserting a roller and an inner part of a bearing inner ring of the radar 100,
Wherein the vibration data is a Grms value,

Wherein x represents a random variable, and p (x) represents a function of a random variable. 8. The method of claim 7,
Wherein the transmitting step transmits noise data measured by a second sensor attached to the bearing,
The determining step
Comparing the received noise data with predetermined reference noise data,
And determining that there is an abnormality in the bearing when the received noise data is equal to or greater than the reference noise data as a result of the comparison. 9. The method of claim 8,
The determining step
And determining that there is an abnormality in the bearing when the received vibration data is equal to or greater than the reference vibration data and the received noise data is equal to or greater than the reference noise data. 8. The method of claim 7,
The determining step
And determining that there is an abnormality in the bearing when the received vibration data is greater than or equal to the reference vibration data by a predetermined number of times. 8. The method of claim 7,
The determining step
Calculating a similarity between the pattern of the received vibration data and the reference vibration data pattern,
Comparing the calculated similarity with a predetermined reference similarity, and determining that there is an abnormality in the bearing when the calculated similarity is equal to or greater than the reference similarity as a result of the comparison. delete

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