KR20080102870A - Position controler apparatus and method thereof - Google Patents

Abstract

A position controller apparatus and method thereof is provided to correct the position of a fabric automatically when the fabric is deviated from the predetermined position. In a position control device, a sensor unit(210) provides different outputs according to the location of the fabric, and a setting unit sets parameters including fixed information according to the environment. A variable amplifying unit variably amplifies the output of the sensor unit according to the external control signal and a driving signal controller transmits the driving signal to a cylinder unit . A gain of the variable amplifying unit is determined by comparing deviation generated from computation of output with parameter.

Description

Position control device and its control method {POSITION CONTROLER APPARATUS AND METHOD THEREOF}

1 is a perspective view of a conventional position control device.

2 is a block diagram of a control circuit constituting a conventional position control apparatus.

3 is a perspective view of a position control apparatus according to the present invention.

Figure 4 is a block diagram of a control unit constituting a position control apparatus according to the present invention.

5 is a graph of a gain determination process of the position control apparatus according to the present invention.

6 is a drive signal graph for the output of the sensor included in the position control apparatus according to the present invention.

7 is a flowchart of a position control method according to the present invention;

<Explanation of symbols for the main parts of the drawings>

200: fabric mounting base 210: sensor

220: control unit 230: work cylinder

240: base 300: sensor

310: amplification unit 320: control unit

330: memory unit 340: setting unit

350: drive signal providing unit 360: interface

The present invention relates to a fabric position control device that can accurately wind or unwind the fabric, and more specifically, the fabric is positioned without being biased to one side based on a data value output by sensing the edge of the fabric through a sensor. It relates to a position control device and a control method for controlling so that it can be accurately wound or unwound without damage.

In general, EDGE POSITION CONTROLLER (hereinafter referred to as EPC device) is an equipment that controls the edges of the fabric wound around the fabric side and gravure printing, textile, and steel companies. It is used to adjust the fabric stand by detecting the position of the edge of the fabric that is transported so as to be uniformly wound.

The EPC operates in such a way that the position of the fabric mounting stand is adjusted based on a sensor for detecting the edge of the fabric to be conveyed and the detection content of the sensor. The sensor may include various sensors, but is mainly composed of a light emitting device and a light receiving device. The sensor is used.

The EPC amplifies the electrical change of the sensor outputting a change in the amount of light collected as an electrical signal in proportion to the positional change of the distal edge of the sensor to operate the motor controller to control the movement of the work cylinder that adjusts the distal end from side to side. By controlling the left and right by the change sensed by the sensor, according to the adjustment so that the edge of the conveyed fabric always passes the set position so that the edge surface can be arranged evenly when wound in a cylindrical shape on the opposite surface.

In other words, when the edge of the fabric changes, the voltage applied to the work cylinder is adjusted to maintain the edge of the fabric evenly by moving the fabric mounting table as opposed to the inequality of the fabric.

Looking at the configuration of a conventional EPC device, as shown in Figure 1, is installed so as to move left and right on the base 140 and placed on the fabric mounting stand 100 and the fabric mounting stand 100 By comparing the sensor 110 for detecting the left and right movement of the fabric so that the edge of the fabric wound on the opposite side roller at a constant speed evenly, the signal input from the sensor 110 and a predetermined signal and adjust the amplification amount The control circuit 120 to adjust the left and right movement of the fabric mounting stage, and the work cylinder 130 to adjust the edge of the fabric conveyed in accordance with the signal applied by the control circuit 120 to be corrected to a preset position Can be configured.

In particular, the control circuit for controlling the sensitivity of the sensor and the left and right movement of the displacement stand is as shown in FIG. Referring to FIG. 2, the control circuit may include an amplifier 21 for amplifying a signal output from the sensor 10 and a signal output through the amplifier 21 in advance so that the position of the far end can be easily adjusted. The comparison unit 22 may be configured to compare the set signal, and the driving signal generator 23 may be configured to drive the work cylinder 30 based on the information of the comparison unit 22.

In addition, the EPC apparatus varies the sensitivity intensity of the sensor and the voltage corresponding to the signal outputted at the center of the variable detector according to the type and installation environment of the fabric, so that the fabric is uniformly wound. The setting process is required. Since the setting process is performed manually, the amplifying unit 21 includes an amplifying volume 24 for setting a gain which is an amplification degree of a signal, and an instrument panel 25 displaying the gain, and the comparing unit 22. ) May include a voltage volume 26 for setting the output signal by centering the far end as a reference point and an instrument panel 27 displaying the reference point.

As described above, the EPC device places the far end in the center of the sensor and goes through a process of setting a parameter corresponding to the position through the control circuit. The following problems may occur during the process.

First of all, during the initial setting of the sensor, the edge of the fabric should be in the center of the variable detector. At this time, since the setting process is not set according to the numerical value using any tool, but is set according to the numerical value of the user directly positioning and guessing the fabric, there is a problem that a product having a certain quality is difficult to come out because the center point of the sensor is individually for each user.

In addition, the work cylinder moves the work cylinder by amplifying the change amount with the amplified volume of the control circuit on the basis of the center point of the sensor, the right and left are not proportional exactly according to the setting by the user's guess. Failure often occurs. Accordingly, when the left and right movement speed of the work cylinder is changed and the fabric is out of the preset center point, the left and right movement speed of the fabric mounting stand is longer than the movement time in either direction, so that the fabric conveyed at high speed is not adjusted. Since the edge of the fabric is not uniformly arranged because of the winding, when winding a thin film or aluminum foil, eccentricity may occur on the left and right sides of the fabric to be wound, thereby causing wrinkles or printing.

In addition, there is a need for several attempts to accurately set the center point of the sensor to the end of the fabric, and the control circuit responds to the work circuit in the case of fine center point deviation that does not cause a problem in winding the fabric. By continuously driving the shake caused by frequent left and right alternating fabric mounting stage there was a problem to deviate more from the center point.

Accordingly, an object of the present invention is to provide a position control device that allows the edge of the fabric to be constantly positioned with a single setting and is automatically corrected when the fabric leaves the designated position so that the fabric is wound quickly and accurately without shaking. .

In order to achieve the above object, the present invention, in the position control device for maintaining the edge of the fabric uniformly moved to the left and right by a work cylinder including a motor winding or unwinding the mounted fabric, the position of the fabric A sensor unit for providing different outputs according to the present invention, a setting unit for setting parameters including fixed information according to an installation environment, a variable amplifier unit for amplifying the output of the sensor unit according to an external control signal, and the work cylinder unit A drive signal control unit which transmits a drive signal to the control unit; and a deviation generated by calculating an output value when the sensor unit is completely opened or cut off by the far-end, compared with the parameter, and determines the gain of the variable amplifier unit, and outputs the sensor unit. It characterized in that it comprises a control unit for generating the drive signal based on.

In addition, based on the output of the sensor for detecting the edge of the fabric on the basis of the position control method for maintaining the edge of the fabric in the installation environment in which the fabric taking band to take the fabric through the work cylinder including the motor is moved left and right, According to the first step of setting a fixed basic parameter, and a second step of calculating a deviation from the measured values when the sensor is fully opened and blocked by the far end, and the deviations and measured values and the parameters. And a third step of determining a gain for amplifying the output of the sensor, and a fourth step of generating a driving signal based on the output of the sensor.

At this time, the parameter is a setting element for operating the position control device in an optimal state according to the present invention and the position control device determines the gain of the output of the sensor so as to correspond to the parameter, Fine correction is possible in position adjustment. To this end, the parameter may be characterized in that it comprises the output change region of the sensor corresponding to the operation of the work cylinder, the limit value of the drive signal for the work cylinder control.

The control unit may further include deviation measuring means for measuring a deviation between a first output measured when the sensor is cut off to the far end and a second output measured when the sensor is opened, and half of the deviation measured by the deviation measuring means. Reference means for calculating the average output in addition to the second output of the measured value, and comparing means for comparing the output of the sensor generated according to the movement of the far end with the average output. That is, the average output corresponding to the criterion of the position of the far end of the far-end can be set, and the position deviation can be determined with respect to the output of the sensor and the average output.

In addition, the control unit may further include determining means for determining a gain of the sensor output based on an output change region of the sensor for the operation of the work cylinder, and amplify the output of the sensor according to the set gain to the preset output change region. By adapting the fabric of various materials, it is possible to accurately and easily determine whether it is detached and to cope uniformly by applying the characteristics of each fabric.

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

3 is a view showing the configuration of the position control apparatus according to the present invention. Referring to FIG. 3, the position control apparatus according to the present invention includes a sensor unit 210 that detects an edge of the fabric placed on the fabric placement table 200, and the fabric based on the output of the sensor unit 210. The control unit 220 for detecting the degree of departure of the control unit and generates a driving signal accordingly, and the far end placing table on the base 240 based on the driving signal generated by the control unit 220 ( It may be configured as a work cylinder 230 to move the right and left 200 so that the fabric is correctly wound.

The sensor unit may utilize an infrared sensor including a light emitting unit for emitting light and a light receiving unit for receiving the light. The edge of the fabric is wound between the light emitting portion and the light receiving portion, and generates a signal corresponding to the degree of departure of the edge of the fabric from the measurement center point according to a change in the amount of light obtained from the light receiving portion, and transmits the signal to the control unit.

The control unit 220 determines the average output corresponding to the measurement center point of the sensor unit 210 and determines the gain which is the amplification degree of the signal coming from the sensor unit 210. Can be. Accordingly, the control unit 220 compares the output provided by the sensor unit 210 with the average output to determine the degree of departure of the far-end, and generates a drive signal corresponding to the degree of departure and generates the walk signal. Transmit to cylinder 230. The work cylinder 230 moves the fabric placing table 200 to the left and right according to the driving signal to correct the edge of the fabric to be at the measurement center point so that the fabric is uniformly wound.

At this time, the position control apparatus according to the present invention has the advantage that the calculation of the average output and the gain of the amplification degree for the output of the sensor unit 210 is automatically determined, so that the repetition of calibration is unnecessary. Detailed configuration of the control unit 220 and its role will be described in detail.

Figure 4 shows a detailed configuration of the position control device of the fabric according to the present invention. The sensor unit 210 transmits the outputs when they are completely blocked by the far end and when they are opened, to the control unit 220. Subsequently, the control unit 320 that performs a calculation for position control of the far-end and generates a signal according thereto calculates a deviation generated from the output and determines an average output based on the deviation, and the memory unit 330 Save it. Thereafter, the output generated while the edge of the fabric passes through the sensor unit 210 is compared with the average output to determine whether the fabric is out of position. The calculation process of the average output will be described in detail below.

At this time, the deviation may vary in size depending on the material, the thickness of the fabric. If the size of the deviation is insufficient, the control unit 320 may have difficulty in subdividing the dissociation degree of the distal end, and thus, the granularity of the driving signal generated corresponding thereto may be limited, thereby making it difficult to finely adjust the position of the distal end. have. Therefore, it is necessary to amplify the deviation in order to enable fine positioning of the far end.

In order to achieve the above, the control unit 320 is to match the deviation to the output range based on the information of the setting unit 340 is set the output range of the sensor that is easy to locate the edge of the fabric. do. Accordingly, a constant proportional relation is established between the deviation and the output range, and it is advantageous to calculate this. The control unit 320 calculates the gain and transfers the output of the sensor unit 210 to the amplifying unit 310 to amplify the output according to the gain, and then the sensor unit 210 sensed while passing through an edge of the fabric. The output of the amplification unit 310 is amplified to correspond to the output range (that is, the area of the output changeable value) set in the setting unit 340 through the amplification unit 310 so that the control unit 320 determines the degree of departure of the fabric. It is easy to grasp. As described above, since the degree of departure is easily understood, generation of a driving signal corresponding to the degree of departure may also be facilitated.

In this case, the setting unit 340 may be set the operation degree of the work cylinder for the amplified drive signal as well as the information, which is set by the interface unit 360 to obtain a user input or Can be edited.

Hereinafter, a detailed operation process of the present invention will be described in consideration of the above configuration.

를 구한다.5 is a graph sequentially illustrating a method of determining the gain with respect to various outputs generated according to the type of fabric by the position control apparatus according to the present invention. Referring to FIG. 5, c represents a first output when the far end opens the sensor part of the present invention, and a indicates a second output when the far end completely cuts off the sensor part of the present invention. The control unit compares the first output with the second output and based on a large value, minus the rest of the output to the reference output is a deviation.

Obtain

Subsequently, half of the deviation is added to the output other than the reference output or subtracted from the reference output to obtain the average output b. The average output is an output that is a criterion for the determination of the departure of the fabric.

의 차이가 기준치 이하일 경우 상기 워 크실린더의 미세한 조정이 어렵기 때문에, 상기 편차를 상기 설정부에 설정된 센서의 상기 출력범위에 매칭되도록 하여 이후 원단의 가장자리가 상기 센서부를 경유하면서 발생하는 출력의 구분이 용이하도록 한다. 이를 위해, 도 5에 도시된 최대 출력인 MAX에 상기 평균출력을 나누어 상기 증폭부의 이득인 G를 결정할 수 있다. 그외에 편차나 마진을 고려하여 최대출력인 MAX보다 작은 값을 상기 평균출력으로 나눈 값을 이득인 G로 결정할 수도 있다. 또한, 연산의 편의를 위해 기준값을 편차로 나눈 값을 이득인 G로 취할수도 있다.Further, the control unit is the deviation

If the difference is less than or equal to the reference value, it is difficult to finely adjust the work cylinder, so that the deviation is matched to the output range of the sensor set in the setting unit to distinguish the output generated while the edge of the fabric passes through the sensor unit To facilitate this. To this end, the average output is divided by the maximum output MAX shown in FIG. 5 to determine the gain G of the amplifier. In addition, the gain G may be determined by dividing the value smaller than the maximum output MAX by the average output in consideration of the deviation or margin. In addition, for convenience of operation, the value obtained by dividing the reference value by the deviation may be taken as a gain G.

Thereafter, the output generated while the edge of the distal end passes through the sensor unit is amplified by the gain in the amplifying unit and transferred to the control unit. 6 is a graph showing an operating range of a sensor output according to the present invention set in the setting unit, wherein the control unit is a limit between A and B set in the setting unit based on the average output obtained by determining the output of the sensor unit. The driving signal corresponding to the output is generated within the range.

In this case, the controller may prevent driving of the work cylinder for a fine deviation from the range by ignoring the change in the output corresponding to the section of the predetermined range. If the position of the fabric is corrected to the output having insufficient deviation range, the correction operation is frequently performed, which may not only damage the work cylinder that performs the physical movement, but also cause continuous shaking on the fabric mounting table. The position of may be more eccentric or out of print from the reference point of the sensor unit.

Therefore, the setting unit is set to the period α ~ β ignoring the output signal of the sensor for a minute deviation of a predetermined range, based on this the control unit generates a corresponding drive signal for the output of the S2 or S2 ' In addition, the driving signal may not be generated with respect to the output of S1 or S1 'positioned within the?-? Section. At this time, the α ~ β period may be changed by the user's setting, and can be automatically adjusted based on the gain as needed. In addition, the section may be set to a fixed value or determined as a ratio with respect to the measured value.

7 is a flowchart illustrating a position control method of a fabric according to the present invention. Referring to FIG. 7, first, parameters of an output range of a sensor, a drive signal corresponding to the output, an operation degree of the work cylinder corresponding to the drive signal, an operation sensitivity of the work cylinder, and an ignore section are set according to the installation environment. Done.

Since the output is variable according to the type of fabric, the first output when the sensor is blocked by the fabric and the second output when the sensor is opened are obtained, and the output is compared by comparing the first and second outputs. The deviation is obtained by subtracting the remaining output from the higher side. In addition, if the deviation is divided in half and added to the lower one of the first and second outputs, an average output of the first and second outputs can be obtained.

In this case, since the average output should be a reference point for the positional deviation of the far end, the average output should be set to correspond to the sensor output range in order to become a reference point in the sensor output range of the parameter. Therefore, the average output is obtained by dividing the average output from a maximum value or a set value corresponding to the maximum value among the sensor output ranges set in the parameter so as to correspond to the sensor output range. Thereafter, the average output and the output generated while passing through the sensor are amplified according to the gain to correspond to the sensor output range.

In other words, the amplified average output becomes a reference value of the output range set in the parameter, and then the output by the detection of the sensor generated while winding the far-end is also amplified and compared with the reference value. Therefore, the positional deviation of the fabric is determined.

The present invention obtains a deviation between the output obtained by passing the far-end material through the sensor part and the output obtained by opening the sensor part, thereby automatically determining the average output corresponding to the position that becomes a reference of whether the far-end is separated. The gain is automatically adjusted to a range specified in the setting unit on the basis of the control unit, so that the controller can easily determine that the far-end is separated for the next incoming output. In addition, the control unit may finely drive the work cylinder by comparing the amplified output with the average output to determine the degree of deviation, and generates a drive signal corresponding thereto.

The position control apparatus of the fabric according to the present invention has the trouble of manually specifying the reference position by calculating the average output by itself as a reference position for the departure of the fabric through the process of opening and closing the sensor with the fabric. There is a disappearing effect.

In addition, according to the present invention, the gain, which is an amplification degree of the output of the sensor, is determined by itself to be suitable for the optimum condition of the preset device based on the output of the sensor, thereby resulting in an error due to the imbalance between the setting conditions of the device and the manually set gain. There is an effect that can significantly lower the incidence rate.

In addition, according to the present invention, since the reference position for each fabric can be constantly defined as the average output generated by each fabric according to the type of fabric, there is an effect that a product of a certain quality can be obtained for each fabric type. .

Claims (10)

In the position control device for keeping the edge of the fabric to be constantly moved by the work cylinder including the motor winding or unwinding the fabric dressing table is wound, A sensor unit providing different outputs according to the position of the far end; A setting unit for setting parameters including fixed information according to an installation environment; A variable amplifier configured to variably amplify the output of the sensor according to an external control signal; A drive signal controller for transmitting a drive signal to the work cylinder; The control unit for determining the gain of the variable amplification unit by calculating the output value when the sensor unit is completely opened or cut off by the far end compared to the parameter, and the control unit for generating the drive signal based on the output of the sensor unit Position control apparatus comprising a. The method of claim 1, wherein the sensor unit The light emitting part which emits light, Position control device comprising a light receiving unit for receiving the light. The position control apparatus as claimed in claim 1, wherein the parameter includes an output possible region of a sensor corresponding to an operation of the work cylinder and a limit value of a drive signal for controlling the work cylinder. The method of claim 3, wherein the control unit Deviation measurement means for measuring a deviation between a first output measured when the sensor is cut off to a far end and a second output measured when the sensor is cut off; Reference means for calculating a reference value by adding half of the deviation measured by the deviation measuring means to a minimum value of the measured values; Comparison means for comparing the output of the sensor generated by the movement of the far end with the reference value Position control apparatus comprising a. 5. The position control apparatus according to claim 4, wherein the control unit further comprises determining means for determining a gain of the sensor output based on an output possible region of the sensor for the operation of the work cylinder. The position control apparatus as claimed in claim 1, further comprising an interface unit for inputting and editing the parameter. In the position control method for processing the output by the detection of the sensor to take the fabric through the work cylinder including the motor to move the left and right to move the left and right to keep the edge of the fabric constant, A first step of setting fixed basic parameters according to the installation environment; A second step of calculating a deviation from the measured values when the sensor is fully opened and blocked by the far end; Determining a gain for amplifying the output of the sensor based on the deviation and the measured values and the parameter; And a fourth step of generating a driving signal based on the output of the sensor. 8. The position control method according to claim 7, wherein the parameter includes an output change area of a sensor corresponding to an operation of the work cylinder and a limit value of a drive signal for the work cylinder control. 8. The method of claim 7, wherein the second step is to obtain a deviation by subtracting the other one based on one of the measured values when the sensor is opened or shut off, and obtaining the average by adding the deviation to the measured value other than the reference value. Position control method. 10. The position control method according to claim 9, wherein the fourth step generates a driving signal corresponding to the degree of departure of the far-end by comparing the output of the sensor with the average value.

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