TWI569000B - Method of inspecting rotation of rollers - Google Patents

Description

Monitoring method of roller rotation

The present invention relates to a method of monitoring a roller, and more particularly to a method of monitoring whether the rotation of the roller is abnormal.

In today's production technology, Roll to Roll technology is widely used in various industries because of its advantages of continuous mass production, simple process and low cost. In roll-to-roll technology, the wheel is one of the necessary equipment and the main key to the production yield. The roller contains the shaft center, the bearing and the sleeve. When the shaft core or the bearing fails, the roller will not rotate smoothly, which may cause abnormal production and lower yield.

In the past, when detecting the axis or bearing of the roller, most of them use contact detection, which is divided into manual measurement and instrument measurement. The manual measurement is to touch the roller surface by an experienced master to judge the rotation of the roller. Whether it is smooth, but this kind of judgment is too subjective and there is no quantitative data, so it is easy to misjudge. The measurement of the instrument is measured by a vibrometer or a stethoscope. Although quantitative data can be obtained, it is necessary to consider the temperature, humidity, and corrosive gas in the environment, which may easily cause damage to the device. The accuracy of obtaining data is reduced.

In addition to the above contact detection method, the other is to prevent the shaft or bearing The method of failure is regular maintenance, such as periodic replacement of related components. However, the difficulty of this method is that the cycle setting is not easy, and replacing parts too early may result in waste of spare parts, and too late replacement may cause abnormal production.

Therefore, whether it is the aforementioned contact type measuring roller or the regular maintenance of the roller frequency, there are disadvantages. Therefore, there is still a need for a method that can effectively monitor the rotation of the roller.

In view of the above, an object of the present invention is to provide a method for monitoring the rotation of a roller, which adopts a non-contact measurement method, thereby avoiding direct exposure of the measuring device to a harsh environment and affecting the measurement result, and providing an instant And objective quantitative values.

The invention provides a monitoring method for the rotation of a roller. The roller comprises a shaft center, two bearings and a sleeve. The shaft core passes through the sleeve, and the bearing sleeves are sleeved on both ends of the shaft core and coupled to the sleeve. The monitoring method comprises the following steps: (A) providing a first marking component on one of the outer end faces of the roller shaft, and a second marking component on the bearing end surface on the same side of the first marking component, the first marking component being an axial center Any point other than the center of the circle; (B) using an imaging element to image the axis of the first indicator element and the bearing end face with the second indicator element to obtain a first image; (C) transmitting the first image to a processing element to define a relative first coordinate of the first indicator element is (X _m , Y _m ) and a relative second coordinate of the second indicator element is (X _n , Y _n ); (D) will be relative to the first coordinate (X _m , Y _m ) and the relative second coordinate (X _n , Y _n ) are transmitted to a computing component to calculate a distance value between the first first component and the second second component; (E) the roller continues During the rotation, repeat the foregoing steps (B) to (D) to obtain a plurality of distances (F) Calculating the distance value obtained in the step (E) according to the following formula, and obtaining a coefficient of determination, the formula is y(t)=a*Sin(t*) 2 π / p) + C, y is the distance value corresponding to the time series, a is the amplitude, t is the time series, p is the period, C is the distance value of the starting time point; and (G) monitoring decision coefficient, Determine if the wheel is rotating abnormally.

According to an embodiment of the present invention, in step (D) of the monitoring method of the rotation of the roller, the distance value is calculated by the following formula: [(X _n -X _m ) ² +(Y _n -Y _m ) ² ] ^{1/ 2} .

According to an embodiment of the present invention, in the monitoring method of the rotation of the roller, the bearing system comprises a first rotating ring, a second rotating ring and a plurality of rotating elements, wherein the second rotating ring is disposed on the first rotating ring. The periphery of the rotating element is disposed between the first rotating ring and the second rotating ring.

According to an embodiment of the present invention, in the monitoring method of the rotation of the roller, the second indicator element is disposed on the second rotating ring of the bearing.

According to an embodiment of the present invention, in the monitoring method of the rotation of the roller, the second indicator element is disposed on the first rotating ring of the bearing.

According to an embodiment of the present invention, in the step (G) of the monitoring method of the rotation of the roller, when the coefficient of determination is less than 0.9, it is determined that the roller is abnormally rotated.

According to an embodiment of the present invention, after the step (G) of the monitoring method of the rotation of the roller, the step (H) is further included, and when the rotation of the roller is abnormal, a warning component immediately issues an alarm.

To further illustrate the technical features of the present invention and the effects achieved, the preferred embodiments and the detailed description are as follows.

100‧‧‧Roller

110‧‧‧Axis

120‧‧‧ bearing

121‧‧‧First rotating ring

122‧‧‧Second rotating ring

123‧‧‧Rotating components

140‧‧‧ sleeve

150‧‧‧First marking element

160‧‧‧Second marking element

S21~S27‧‧‧Steps

The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;

2 is a flow chart showing a method for monitoring the rotation of a roller according to an embodiment of the present invention.

The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Referring to Figure 1, there is shown a side view of a roller of an embodiment of the present invention. As shown in FIG. 1, the roller 100 to which the present invention is applied includes a shaft center 110, two bearings 120 and a sleeve 140. The shaft 110 is passed through the sleeve 140, and the two bearings 120 are respectively sleeved at two ends of the shaft 110 and coupled to the sleeve 140. In one or more preferred embodiments of the present invention, the bearing 120 includes a first rotating ring 121, a second rotating ring 122, and a plurality of rotating elements 123. The second rotating ring 122 is disposed on the first At the periphery of a rotating ring 121, a rotating member 123, such as a steel ball, is disposed between the first rotating ring 121 and the second rotating ring 122.

Referring to Figure 2, there is shown a flow chart of a method for monitoring the rotation of the wheel of the present invention. See also Figure 1 and Figure 2. The monitoring method for the rotation of the roller disclosed in the present invention comprises the following steps:

In step S21, a first indicator element 150 is disposed on an outer end surface of one of the shafts 110 of the roller 100, and a second indicator element 160 is disposed on an end surface of the bearing 120 on the same side of the first indicator element 150. The first indicator element 150 is any point other than the center of the axis 110.

In one or more embodiments of the invention, the second indicator element 160 is disposed on the second rotating ring 122 of the bearing of the roller 100.

In one or more embodiments of the present invention, the second indicator element 160 is disposed on the first rotating ring 121 of the bearing of the roller 100.

In the embodiment of the present invention, the second indicator element is not limited to being disposed on the first rotating ring or the second rotating ring, but only needs to be satisfied during the rotation of the roller, and the second indicating element is performed with the first indicating element. The condition of relative position movement.

In step S22, an imaging element is used to image the axis 110 having the first indicator element 150 and the end surface of the bearing 120 having the second indicator element 160 to obtain a first image. The imaging element may be, for example, a Charge-Coupled Device (CCD) or a Complementary Metal-Oxide-Semiconductor (CMOS) inductor, but is not limited thereto.

In step S23, the first image is transmitted to a processing element to define that the relative first coordinate of the first indicator element 150 is (X _m , Y _m ) and the relative second coordinate of the second indicator element 160 is (X _n , Y _n ). The processing element can be, for example, a computer, but is not limited thereto.

In step S24, the relative first coordinate is (X _m , Y _m ) and the second relative coordinate is (X _n , Y _n ) is transmitted to a computing component to calculate a relative first marking component 150 and a relative second marking. The distance value between elements 160. This distance value can be calculated, for example, by the following formula: [(X _n -X _m ) ² +(Y _n -Y _m ) ² ] ^1/2 , (X _m , Y _m ) is the relative first coordinate of the first indicator element, (X _n , Y _n ) is the relative second coordinate of the second indicator element being (X _n , Y _n ).

In step S25, during the continuous rotation of the roller, the above steps S22 to S24 are repeatedly performed to obtain a plurality of distance values.

In step S26, the plurality of distance values obtained in step S25 are curve-fitted according to the following formula to obtain a coefficient of determination, and the formula is y(t)=a*Sin. (t*2 π/p)+C, where y is the distance value of the corresponding time series, a is the amplitude, t is the time series, p is the period, and C is the distance value of the starting time point. In a preferred embodiment of the present invention, the time series of rotation of the roller means that each time point t=1, t=2, t=3, ... t=10 (second) when the roller rotates, The distance value of the previous step is brought into the formula, and after the curve of the sinusoidal function is fitted, a coefficient of determination is obtained. When the coefficient of decision becomes closer to 1, it means that the roller rotates normally. Conversely, when the decision coefficient approaches 0, it means that the wheel is rotating abnormally.

In step S27, the above determination coefficient is monitored to determine whether the wheel rotation is abnormal. In a preferred embodiment of the present invention, when the coefficient of determination is less than 0.9, it is determined that the roller is abnormally rotated. The setting of the determination coefficient can be set in advance or further adjusted according to the actual maintenance condition of the inspector, and is not limited to any particular method.

In another preferred embodiment of the present invention, after step S27, step S28 is further provided. When it is determined that the roller is abnormally rotated, a warning component immediately issues an alert.

The monitoring method of the roller rotation proposed by the present invention can be performed by the following monitoring system, but is not limited thereto. Please refer to Figure 1 together, which will be described in detail below.

The monitoring system of the roller rotation comprises a first marking component, a second marking component, an imaging component, a processing component, a computing component and a monitoring component.

The first indicator element is disposed at an outer end surface of the shaft 110 of the roller 100. a second indicator element disposed on a bearing end face on the same side of the first indicator element, wherein the first indicator element is any point other than the center of the axis 110. Compared with one of the inventions In a preferred embodiment, the second indicator element is disposed on the second rotating ring 122 of the bearing. In another preferred embodiment of the invention, the second indicator element is disposed on the first rotating ring 121 of the bearing.

The imaging device is configured to image the axis 110 having the first indicator element and the bearing 120 having the second indicator element together to obtain a first image. The imaging element can be, for example, a Charge-Coupled Device (CCD) or a Complementary Metal-Oxide-Semiconductor (CMOS) inductor.

a processing component coupled to the imaging component, wherein when the first image is transmitted to the processing component, the processing component defines a first first coordinate of the first image in the first image as (X _m , Y _m ) and a second The relative second coordinate of the marker element is (X _n , Y _n ). In a preferred embodiment of the invention, the processing component can be, for example, a computer.

a computing component coupled to the processing component, wherein the processing component transmits the relative first coordinate of the first marking component to (X _m , Y _m ) and the relative second coordinate of the second marking component to (X _n , Y _n ) When calculating the component, the computing component calculates a distance value between the first indicator component and the second marker component in the first image. This distance value can be calculated, for example, by the following formula, but is not limited thereto: the distance value = [(X _n - X _m ) ² + (Y _{n -} Y _m ) ² ] ^1/2 , (X _m , Y _m ) is the first The relative first coordinate of a marker element, (X _n , Y _n ) is the relative second coordinate of the second marker component.

a curve matching component coupled to the computing component for obtaining a coefficient of determining a plurality of distance values according to the following formula, wherein the formula is y(t)=a*Sin(t*2 π/p ) + C, y is the distance value of the corresponding time series, a is the amplitude, t is the time series, p is the period, and C is the distance value of the starting time point. When the obtained decision coefficient is closer to 1, it means that the roller rotates normally. When the obtained decision coefficient is closer to 0, it means that the roller is abnormally rotated. The curve matching component can be stored in a computer program product. After the computer loads the component and executes it, a plurality of distance values can be configured to obtain a coefficient of determination.

The monitoring component is coupled to the curve matching component for monitoring the coefficient of determination to determine whether the roller rotation is abnormal. In a preferred embodiment of the present invention, when the coefficient of determination is less than 0.9, it is determined that the roller is abnormally rotated. The setting of this decision coefficient can be preset according to the experience of the tester, and is not limited to any particular method.

In another embodiment of the present invention, the monitoring system of the abnormal rotation of the roller further includes a warning component coupled to the monitoring component, and when it is determined that the roller is abnormally rotated, the warning component immediately issues an alarm.

The imaging element, the processing element, the computing component, the monitoring component and/or the warning component in the monitoring system of the abnormal rotation of the roller may be selectively disposed in a transparent box, such as an acrylic box, to prevent the measuring device from being The measurement results affected by environmental factors extend the service life of the monitoring system.

As described above, the method for monitoring the rotation of the roller according to the present invention is non-contact measurement, so that the measurement device can be directly exposed to the bad detection environment to affect the measurement result, and the instantaneous and objective quantitative value can be provided. .

While the invention has been described above in the preferred embodiments, it is not intended to limit the invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

S21~S27‧‧‧Steps

Claims (8)

A method for monitoring the rotation of a roller, the roller includes an axial center, two bearings and a sleeve, the shaft is passed through the sleeve, and the bearings are respectively sleeved at two ends of the shaft and coupled to The sleeve, wherein the monitoring method comprises the following steps: (A) providing a first marking element on one of the outer end faces of the roller shaft, and a second marking component on a bearing end surface on the same side of the first marking component, The first indicator element is any point other than a center of the axis; (B) using an imaging element to image the axis with the first indicator element and the bearing end surface with the second indicator element to obtain a a first image; (C) transmitting the first image to a processing element to define a relative first coordinate of the first sign component (X _m , Y _m ) and a second relative of the second sign component The coordinates are (X _n , Y _n ); (D) transmitting the relative first coordinate (X _m , Y _m ) and the relative second coordinate (X _n , Y _n ) to a computing component to calculate the first a distance value between the marking element and the second marking element; (E) during the continuous rotation of the roller, before repeating Step (B) to step (D) to obtain a plurality of distance values; (F) using a curve matching component to determine the distance values obtained in step (E) according to the following formula: Coefficient, the formula is y(t)=a*Sin(t*2 π/p)+C, y is the distance value of the corresponding time series, a is the amplitude, t is the time series, p is the period, C is the start The distance value at the time point; and (G) using a monitoring component to monitor the determination coefficient and determine whether the wheel rotation is abnormal. The monitoring method according to claim 1, wherein the imaging element in the step (B) is a charge-coupled device (CCD) or a complementary metal-oxide semiconductor (Complementary Metal-Oxide- Semiconductor: CMOS) sensor. The monitoring method according to claim 1, wherein the distance value of the step (D) is obtained by the following formula: distance value = [(X _n - X _m ) ² + (Y _{n -} Y _m ) ² ] ^1/2 . The monitoring method according to the first aspect of the invention, wherein the determining coefficient in the step (G) is less than 0.9, determining that the roller is abnormally rotated. The monitoring method of claim 1, wherein the bearing comprises a first rotating ring, a second rotating ring and a plurality of rotating elements, wherein the second rotating ring is disposed on the first rotating ring The rotating elements are disposed between the first rotating ring and the second rotating ring. The monitoring method of claim 5, wherein the second indicator element is disposed on the second rotating ring of the bearing. The monitoring method of claim 5, wherein the second indicator element is disposed on the first rotating ring of the bearing. The monitoring method according to the first aspect of the patent application, after the step (G), further comprises the step (H), when the roller rotates abnormally, a warning component immediately issues an alarm.