KR101090271B1 - Apparatus for detecting line position using optical detecting device - Google Patents

Abstract

 The present invention relates to a line position detection apparatus using a light detection element that can determine the position of the object using multiple photocells, such as 1 × 2 or 2 × 2. A detection apparatus comprising: a line position detector configured to install a multi-cell having a predetermined rotational angle at a point spaced at a predetermined interval in a line position detection region, and detect a position of a line displayed on an object using the multi-cell; A measurement amplifier for amplifying and outputting an analog line position detection signal input from multiple cells of the line position detection unit; An A / D converter is provided inside to convert the analog line position detection signal into a digital line position detection signal, respectively, and the digital line position detection signals converted by the A / D converter are received and compared. A microcontroller for determining the thickness of the line, calculating a difference or a sum of the digital line position detection signal according to the determined thickness of the line, and then determining the position of the line using the calculated value; A D / A converter for converting a digital line position determination signal output from the microcontroller into an analog line position determination signal; And an amplifier for amplifying and outputting the analog line position determination signal.

Position, Detection, Multicell, CCD Sensor, CDS Sensor

Description

Apparatus for detecting line position using optical detecting device

The present invention relates to a line position detection device using a light detection element.

More particularly, the present invention relates to a line position detecting apparatus using a light detecting element that can identify a position of an object using multiple photocells such as 1x2 or 2x2.

In the line position detecting apparatus according to the related art, as shown in FIG. 1, a general 1 × 2 photocell is placed vertically on a detection unit, and a method of detecting a line is located at a predetermined distance apart from each other.

The line position detection apparatus according to the prior art, as shown in FIGS. 2 to 4, vertically install a 1 × 2 photocell at a point spaced apart at a predetermined interval in the line position detection region of the line position detection apparatus, so that A line position detecting unit 10 for detecting a position, and an A / D converter 20 for converting and outputting an analog line position detecting signal input from two cells of the line position detecting unit 10 to a digital line position detecting signal, respectively. And a microcontroller 30 which receives the two digital line position detection signals, compares the values, calculates the difference, and determines the position of the line using the calculated values.

The line position detector 10 is implemented using one of a photodiode, a phototransistor, and a sensor using a CDS.

The operation of the line position detection device configured as described above will be described with reference to FIGS. 1 to 4.

First, when an object marked with a line position passes through the line position detector 10, the line position detector 10 receives light incident through a line displayed on the object as a 1 × 2 photocell and receives an analog line position detection signal A /. Output to D converter 20. In this case, the relationship between the photocell and the line provided in the line position detecting unit 10 is as shown in FIGS. 2 to 4.

Then, the A / D converter 20 converts the analog line position detection signal received from the 1 × 2 photocell into a digital line position detection signal, respectively, and outputs the digital line position detection signal to the microcontroller 30, and the micro controller 30 outputs the A line. The two digital line position detection signals inputted through the 1x2 photocell input from the / D converter 20 are compared, the difference is calculated, and the line position is detected using the difference.

However, the line position detection apparatus according to the prior art has a problem in that the position of the line, which is a sensing object, cannot be accurately detected because the output signal of the same level is output when both the line is in the center and when there is no line.

SUMMARY OF THE INVENTION An object of the present invention is to provide a line position detecting apparatus using a light detecting element that can detect a position of an object by using a photocell such as 1 × 2 or 2 × 2.

That is, in the case of a photocell such as 1 × 2, an overlapping area is generated for the sensing area, so it is more accurate to determine the presence or absence of lines. It is possible to identify the position of the line more precisely so that it can be secured.

In addition, the present invention is to provide a slight inclination angle without the cell to stand vertically, provided in a diagonal line to detect the change in the output value of the two or four cells when the line is in the sensing area under any circumstances to determine the position of the line It is an object of the present invention to provide a line position detection apparatus using a photodetecting device capable of tracking.

One embodiment of the present invention for achieving the above object, in the detection device for detecting the position of the line using the photodetecting device, provided with a predetermined rotation angle at a point spaced apart a predetermined interval in the position detection area A line position detection unit for installing a multi-cell and detecting a position of a line displayed on an object using the multi-cell; A measurement amplifier for amplifying and outputting an analog line position detection signal input from multiple cells of the line position detection unit; An A / D converter is provided inside to convert the analog line position detection signal into a digital line position detection signal, respectively, and the digital line position detection signals converted by the A / D converter are received and compared. A microcontroller for determining the thickness of the line, calculating a difference or a sum of the digital line position detection signal according to the determined thickness of the line, and then determining the position of the line using the calculated value; A D / A converter for converting a digital line position determination signal output from the microcontroller into an analog line position determination signal; And an amplifier for amplifying and outputting the analog line position determination signal.

Preferably, the rotation angle of the multiple cells of the position detection unit is 90 ° / (2n). N is the number of cells.

When arranging one cell of the line position detecting unit in an array of n × m, 90 ° / (2n) diagonal lines are formed on a grid of horizontal and vertical equal intervals, and cells are formed on an intersection of vertical lines and diagonal lines. It is preferable. N is the number of cells.

The microcontroller compares the digital line position detection signals inputted from neighboring cell blocks when the line thickness is determined to be 1 mm or less, calculates the difference, and uses the calculated value to determine the line position. When the line thickness is determined to be 1 mm or more, the digital line position detection signals inputted from neighboring cell blocks are compared, the sum is calculated, and the line positions are detected using the calculated values.

In the present invention, when the thickness of the line detected through the line position detection unit composed of 2 × 2 multicells is 50% of the detection area, if the line thickness is 50% or less, the microcontroller determines the difference between the 1-3 areas of the multicell. The position of the line is detected by calculating the position of the line by the signal, and if the line is out of the sensing area, the position of the line is detected by calculating the position of the line by the sum signal between 0-2 regions. At this time, the maximum and minimum values are output in the sensing area of the line, and the maximum and minimum values are maintained when the line is out of the sensing area.

In the present invention, when the thickness of the line detected through the line position detection unit composed of 2 × 2 multicells is 100% of the detection area, when the line thickness is 50% or more of the detection area, the microcontroller determines the line position by the comparison sum of all areas. It is characterized by calculating and determining.

In the present invention, if the thickness of the line detected through the line position detection unit consisting of 2 × 2 multicells is 150% of the detection area, the edge detection is a case where the line thickness is 100% or more, and thus, the microcontroller calculates a comparison sum of all signals. It is characterized by determining the line position.

Another embodiment of the present invention provides a detection apparatus for detecting the position of a line marked on an object by using a photodetector, comprising: a light emitting unit for emitting light on a line marked on the object; and a light emitted through the light emitting unit A line position detector comprising an image sensor that receives and detects the position of the line displayed on the object; A light emission driver for driving the light emitting unit to emit light in response to a control signal input from an outside; An image sensor driver for driving the image sensor in response to a control signal input from an outside; A first image receiver for outputting an analog signal input from the image sensor of the line position detector as an analog signal, a second image receiver for outputting an analog signal input from the image sensor of the line position detector as a digital signal, and the optical signal; While outputting a control signal to the emission driver and the image sensor driver, a reference voltage is detected from the analog signal input from the first image receiver, and the position of the line displayed on the object is determined using the digital signal input from the second image receiver. Judging microcontroller; And an output circuit unit for converting the digital line position detection signal output from the microcontroller into an analog line position detection signal.

The light emitting part may be integrally formed at one end in a state in which the light emitting part is spaced apart from the image sensor at a predetermined interval, and may be configured to emit light to an upper portion of the line marked on the object.

The light emitting part is provided to be spaced apart from the image sensor at a predetermined interval, and is provided so that light is emitted below the line displayed on the object, and the image sensor receives the light passing through the object and the position of the line of the object. It is characterized in that for detecting.

The line position detection unit may include an image sensor and a lens coupled to one end of the image sensor, and the light emitting unit may include a hole coupled to the lens, and a plurality of light source elements may be arranged around the hole. Characterized in that, the light emitted by the light source element of the light emitting unit is emitted to the linear portion of the object, the lens of the linear position detection unit receives the light reflected by the linear portion to detect the position of the line of the object It is characterized by.

The line position detection unit may emit a light to an object on which a line is displayed, and a lens provided in parallel with the object to receive the reflected light, a case in which the lens is fixedly coupled, and a lens inside the case. A total reflection prism provided to face the light source, a light emitting part provided inside the case so that light is emitted to the object through the total reflection prism, and the light emitted by the object is reflected to the lens and the total reflection prism. It is characterized by consisting of an image sensor provided inside the case to detect the incident light.

The line position detection unit includes a lens provided in parallel with the object to emit light to an object on which a line is displayed and to receive reflected light, a pentaprism closely coupled to the lens, and the pentaprism And a light emitting part provided at a predetermined distance from the lower end of the pentaprism so that light may be emitted to the object through the lens, and to face the light emitting part and the pentaprism in parallel. Characterized in that consisting of the image sensor.

In the present invention, the overlapping area of the sensing area is generated in the case of a photocell such as 1 × 2, so that the presence or absence of a line can be more accurately determined. By securing the area, it is effective to distinguish the position of the line more accurately.

In addition, the present invention is to provide a slight inclination angle to the vertical line rather than having the cell to stand vertically to detect the change in the output value of the two or four cells when the line is in the sensing area under any circumstances, the position of the line It can be used to track and detect whether there is a line or not.

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

Multi Cell Method

The line position detecting apparatus using the photodetector according to the present invention is provided with a multi-cell provided with a predetermined rotation angle at a point spaced at a predetermined interval in the line position detecting region, and the position of the line displayed on the object using the multi-cell The linear position detecting unit 100 for detecting, the measurement amplifier 200 for amplifying and outputting the analog linear position detecting signal inputted from the multiple cells of the linear position detecting unit 100, and the analog linear position detecting signal An internal A / D converter converts and outputs each line position detection signal, and receives the digital line position detection signals converted by the A / D converter, compares the values, and determines the thickness of the line. A microcontroller 300 that calculates a difference or a sum of the digital line position detection signal according to the thickness of the line and then determines the position of the line using the calculated value; And a D / A converter 400 for converting the digital line position determination signal output from the microcontroller 300 into an analog line position determination signal, and an amplifier 500 for amplifying and outputting the analog line position determination signal. do.

The line position detection unit 100 is implemented using one of a photodiode, a phototransistor, and a sensor using a CDS.

The rotation angle of the multiple cells (1 × 2, 1 × 12, 2 × 2, 2 × 8, etc.) of the line position detecting unit 100 is 90 ° / (2n) as shown in FIGS. N is the number of cells.

When arranging one cell of the line position detecting unit 100 in an array of n × m, 90 ° / (2n) diagonal lines are formed on a grid of horizontal and vertical equal intervals as shown in FIGS. 9 and 10. It is preferable to form a cell on the intersection of the vertical line and the diagonal line.

As shown in FIG. 11, the relationship between the cell 2 formed on the intersection of the vertical line and the diagonal line and the cell 1 formed on the vertical line at a position opposite to the vertical line is y = xtanθ, where x is a cell ( It is the vertical distance from the center of 1) to the vertical line at the lower end, y is the distance left or right from the center of the said cell 1, and (theta) is the inclination angle of an oblique line.

As shown in FIGS. 12 and 13, when the thickness of the line is determined to be 1 mm or less, the microcontroller 300 compares the digital line position detection signals input from neighboring cell blocks and compares the difference. After the calculation, the line position is detected using the calculated value. When the line thickness is determined to be 1 mm or more, the digital line position detection signals inputted from the neighboring cell blocks are compared, and the sum is calculated. To detect the position of the line.

As shown in FIG. 14, when the line thickness detected by the line position detection unit 100 composed of 2 × 2 multicells is 50% of the detection area, when the line thickness is 50% or less, the microcontroller 300 The position of the line is detected by calculating the position of the line by the difference signal between 1-3 areas of the multicell, and when the line is out of the sensing area, the position of the line is detected by calculating the position of the line by the sum signal between the 0-2 areas. At this time, the maximum and minimum values are output in the sensing area of the line, and the maximum and minimum values are maintained when the line is out of the sensing area.

As shown in FIG. 15, when the thickness of the line is 100% of the detection area, when the line thickness is 50% or more of the detection area, the microcontroller 300 calculates and detects the line position by comparing the total area and detects the line. If it is in the detection area, the detection detects the position of the line using "1-0-0-0, 1-1-0-0, 1-1-1-0".

As shown in FIG. 16, when the thickness of the line is 150% of the sensing area, the edge detection is the case where the line thickness is 100% or more, and therefore, the microcontroller 300 determines the line position by calculating a comparison sum of all signals.

Referring to the line position detection device using the light detection device configured as described above are as follows.

First, when an object having a line displayed on one side passes through the line position detecting unit 100, the line position detecting unit 100 uses the multiple cells installed at a predetermined rotational angle at a point spaced apart from the line position detecting region at a predetermined interval. Detects the position of the line indicated by and outputs the analog line position detection signal to the measuring amplifier 200.

Then, the measurement amplifier 200 amplifies the analog line position detection signal and outputs it to the microcontroller 300, and the micro controller 300 converts the input analog line position detection signal into an A / D converter provided therein. By converting each signal into a digital line position detection signal, comparing the values, calculating the difference or the sum thereof, and determining the position of the line using the calculated values.

At this time, the micro-controller 300 detects the line position according to various conditions, the brief description of the various conditions are as follows.

First, as illustrated in FIG. 12, the microcontroller 300 receives a line position detection signal from adjacent cell blocks to determine whether a line to be detected is a thin line (1 mm or less) or a thick line, and is determined to be a thin line. The digital line position detection signals input from neighboring cell blocks are compared, the difference is calculated, and the line position is determined using the calculated values.

On the other hand, when it is determined that the line is a thick line (1 mm or more), the microcontroller 300 compares the digital line position detection signals inputted from neighboring cell blocks as shown in FIG. 13, calculates the sum, and calculates the sum. Line position is determined using the calculated values.

<When the line is 50% of the detection area>

As shown in FIG. 14, when the line thickness detected by the line position detection unit 100 composed of 2 × 2 multicells is 50% of the detection area, when the line thickness is 50% or less, the microcontroller 300 The position of the line is determined by calculating the position of the line by the difference signal between the 1-3 areas of the multicell, and when the line is out of the sensing area, the position of the line is determined by calculating the position of the line by the sum signal of the 0-2 areas. At this time, the maximum and minimum values are output in the sensing area of the line, and the maximum and minimum values are maintained when the line is out of the sensing area.

<Wire thickness is 100% of detection area>

As shown in FIG. 15, when the thickness of the line is 100% of the detection area, when the line thickness is 50% or more of the detection area, the microcontroller 300 calculates and determines the line position by the comparison sum of all areas. In case of being in the sensing area (cell 2, cell 1), the line position is determined using "1-0-0-0, 1-1-0-0, 1-1-1-0".

<Wire thickness is 150% of detection area>

As shown in FIG. 16, when the thickness of the line is 150% of the sensing area, the edge detection is the case where the line thickness is 100% or more, and therefore, the microcontroller 300 determines the line position by calculating a comparison sum of all signals.

In the case of detecting the position of the line under the above condition, the conventional arrangement method uses a gap between the sensor (cell) elements, so that the interval showing the peak response is constant, unlike the nonlinear output or the dead band. As can be seen in the graph shown at 16, it can be seen that the linear output is implemented.

The microcontroller 300 that detects the position of the line according to the different conditions as described above outputs the digital line position detection signal to the D / A converter 400, and the D / A converter 400 the microcontroller 300. The digital line position detection signal output from the digital signal is converted into an analog line position detection signal, and the analog line position detection signal is output to the amplifier 500 to be amplified and then output to the final output.

Transmission method

Another embodiment according to the present invention, which uses a CCD and CMOS image sensor, will be described with reference to FIG. 17. The line position detection unit 1100 including the light emitting unit 1110 and the image sensor 1120, and will be described later. The light emitting driver 1200 drives the light emitting unit 1110 to emit light in response to a control signal input from the microcontroller 1600 and the control signal input from the microcontroller 1600. An image sensor driver 1300 for driving the image sensor 1120, a first image receiver 1400 for outputting an analog signal input from the image sensor 1120 of the line position detector 1100 as an analog signal, and A second image receiver 1500 for outputting an analog signal input from the image sensor 1120 of the line position detection unit 1100 as a digital signal, and the light emission driver 1200 and the image. While outputting a control signal to the driver 1300, while detecting a reference voltage from the analog signal input from the first image receiving unit 1400, the target object using a digital signal input from the second image receiving unit 1500 The microcontroller 1600 for determining the position of the line 1810 displayed on the (1800) and the output circuit unit 1700 for converting the digital line position detection signal output from the microcontroller 1600 into an analog line position detection signal It is composed.

The light emitting unit 1100 is formed of an RGB light source device (LED).

The image sensor 1120 is preferably a CCD sensor or a CMOS sensor.

The line position detecting unit 1100 detects the position of the line displayed on the object by receiving the light emitted through the light emitting unit 1110 and the light emitted through the light emitting unit 1110 on the line displayed on the object. Sensor 1120.

The light emitter 1110 may be integrally formed at one end in a state in which the light emitter 1110 is spaced apart from the image sensor 1120 at predetermined intervals, and the light emitter 1110 may emit light to an upper portion of the line 1810 indicated on the object 1800. .

The light emitting unit 1110 is provided to face the image sensor 1120 and spaced apart at a predetermined interval, and is provided to emit light below the line 1810 displayed on the object 1800, and the image sensor ( 1120 receives light passing through the object 1800 and detects the position of the line 1810 of the object 1800.

The operation of the transmission position position detection device configured as described above is briefly described as follows.

An embodiment in which a transmission method is applied in a manner of detecting a line marked on an object includes a case in which a light emitting unit 1100 is provided on an upper portion of the object 1800 and a lower portion of the object 1800 as shown in FIGS. 19 and 20. It may be classified into a case in which the light emitting unit 1100 is provided. At this time, the image sensor 1120 for receiving the light emitted through the light emitting unit 1100 to determine the position of the line 1810 displayed on the object 1800, the object 1800 between the It is positioned to face the light emitting unit 1100.

The image sensor 1120 converts incident light into an electrical signal and outputs the electrical signal to the first image receiver 1400 and the second image receiver 1500. Then, the first image receiver 1400 outputs an electrical signal, which is an analog signal, as an analog signal to the microcontroller 1600, and the second image receiver 1500 converts the electrical signal, which is an analog signal, to a digital signal to convert the microcontroller ( 1600).

Then, as shown in FIG. 18, the microcontroller 1600 checks the reference voltage using the analog signal input from the first image receiver 1400 and uses the digital signal input from the second image receiver 1500. The position of the line 1810 is determined, and the determination result is output to the output circuit unit 1700.

The line position detection unit may be applied in two ways to the transmission method, and an embodiment of the two types of line position detection units will be described with reference to FIGS. 19 and 20.

(Examples 1 and 2 of the line position detection unit to which the transmission method is applied)

As shown in FIG. 19, in the first position detecting unit, the light emitting unit 1110 is provided in a state in which the light emitting unit 1110 is spaced apart from the image sensor 1120 at a predetermined interval, one end of which is one end of the image sensor 1120. It is formed integrally with the portion and emits light to the upper portion of the line 1810 indicated on the object (1800).

In the second embodiment of the line position detector, as illustrated in FIG. 20, the light emitter 1110 is provided to face the image sensor 1120 at a predetermined interval, and the line 1810 is displayed on the object 1800. Emits light at the bottom of the. In this case, the image sensor 1120 receives the light passing through the object 1800 and detects the position of the line 1810 of the object 1800.

Reflection

As described above, the line position detector 1100 may be implemented not only by a transmission method but also by a reflection method described later, and an embodiment of the line position detection unit 1100 to which the reflection method is applied will be described with reference to FIGS. As follows.

(Embodiment 1 of the line position detection unit to which the reflection method is applied)

As shown in FIGS. 21A and 21B, the line position detecting unit 1100 includes an image sensor 1120 and a lens 1121 coupled to one end of the image sensor 1120, and the light emitting unit 1110. Has a through portion 1111 coupled to the lens 1121, and a plurality of light source elements are arranged around the through portion 1111.

The light emitting unit 1100 is formed of an RGB light source device (LED).

The image sensor 1120 is preferably a CCD sensor or a CMOS sensor.

The line position detection unit 1100 configured as described above has the light emitted by the light emitting unit 1110 integrally provided with the lens 1121 being incident on the object 1800, and is reflected by the object 1800 to reflect the lens ( 1121). The lens 1121 is incident on the focused light to the image sensor 1120, and the image sensor 1120 converts the optical signal into an electrical signal and outputs the signal to the signal processor 1140. The signal processor 1140 then outputs the signal processed signal to a microcontroller, not shown, so that the microcontroller can determine the position of the line displayed on the object 1800 and output the result.

(Example 2 of the line position detection section to which the reflection method is applied)

As shown in FIG. 22, the line position detector 1100 emits light to the object 1800 on which the line 1810 is displayed, and is provided in parallel with the object 1800 to receive the reflected light. A lens 1121, a case 1122 to which the lens 1121 is fixedly coupled, a total reflection prism 1130 provided to face the lens 1121 inside the case 1122, and the total reflection prism 1130. The light emitting unit 1100 provided inside the case 1122 and the light emitted by the object 1800 are reflected to allow the light to be emitted to the object 1800 through the lens 1121 and the total reflection. The image sensor 1120 is provided inside the case 1122 to detect light incident through the prism 1130.

As shown in FIG. 23, the line position detection unit 1100 configured as described above has the light emitted from the light emitting unit 1100 passing through the total reflection prism 1130 and the lens 1121 to the line 1810 of the object 1800. Light emitted upward and reflected from the line 1810 is focused again through the lens 1121 and is incident to the image sensor 1120 through the total reflection prism 1130.

Then, the image sensor 1120 converts the incident optical signal into an electrical signal and outputs the signal to the signal processor 1140, and the signal processor 1140 outputs the signal processed signal to a microcontroller (not shown). The position of the line indicated at 1800 may be determined and the result may be output.

(Example 3 of the Line Position Detection Part to which the Reflection Method is Applied)

As shown in FIG. 24, the line position detector 1100 emits light to the object 1800 on which the line 1810 is displayed, and is provided in parallel with the object 1800 to receive the reflected light. The light through the lens 1121, the pentaprism 1150 closely coupled to the lens 1121, and the pentaprism 1150 and the lens 1121 may be emitted to the object 1800. An image sensor provided to face in parallel with the light emitting unit 1100 provided at a lower distance from the lower end of the pentaprism 1150 and the light emitting unit 1100 and the pentaprism 1150 interposed therebetween. 1120.

The line position detector 1100 configured as described above is incident on the first surface 1 of the pentaprism 1150, and the light emitted from the light emitting unit 1110 is reflected by the fourth surface 4. The light incident on the second surface 2 is reflected by the second surface 2 and is incident on the line 1810 indicated on the object 1800 through the fifth surface 5 and the lens 1121.

The light incident on the line 1810 is reflected again and focused through the lens 1121 to be incident on the third surface 3 of the pentaprism 1150, and the first surface 1 is formed by the third surface 3. Is reflected back by the first surface 1 and enters the image sensor 1120 through the fourth surface 4.

Then, the image sensor 1120 converts the incident optical signal into an electrical signal and outputs the signal to the signal processor 1140, and the signal processor 1140 outputs the signal processed signal to a microcontroller (not shown). The position of the line indicated at 1800 may be determined and the result may be output.

As described above, the preferred embodiment according to the present invention has been described, but the present invention is not limited to the above-described embodiment, and the present invention is not limited to the scope of the present invention as claimed in the following claims. Anyone with knowledge of the present invention will have the technical spirit of the present invention to the extent that various modifications can be made.

1 is a block diagram for explaining a configuration of a line position detection apparatus using a light detection element according to the prior art.

2 to 4 are diagrams illustrating embodiments of the line position detecting unit of FIG. 1.

5 is a block diagram for explaining the configuration of the line position detection apparatus using the light detection element according to the present invention.

6 to 13 illustrate exemplary embodiments of multiple cells of the line position sensing unit of FIG. 5.

14 to 16 are diagrams for describing a sensing method of a microcontroller according to a thickness of a line.

17 is a configuration diagram illustrating another embodiment of the line position detection device according to the present invention.

FIG. 18 is a diagram for describing a signal applied to FIG. 17.

19 to 24 are diagrams illustrating embodiments of the line position detecting apparatus applied to FIG. 17.

DESCRIPTION OF REFERENCE NUMERALS

100: line position detection unit

200: measuring amplifier

300: microcontroller

400: A / D Converter

500: Amplifier

Claims (11)

A detection apparatus for detecting a line position using a photodetector device, Install a multi-cell provided in a state having a predetermined rotation angle at a point spaced at a predetermined interval in the line position detection area, and receives the light incident through the line displayed on the object to the multi-cell when the object marked the line position passes A line position detector for detecting a position of a line displayed on an object through an analog line position detection signal which is a voltage signal of incident light; A measurement amplifier for amplifying and outputting an analog line position detection signal input from multiple cells of the line position detection unit; An A / D converter is provided inside to convert the analog line position detection signal into a digital line position detection signal, respectively, and the digital line position detection signals converted by the A / D converter are received and compared. A microcontroller for determining the thickness of the line, calculating a difference or a sum of the digital line position detection signal according to the determined thickness of the line, and then determining the position of the line using the calculated value; A D / A converter for converting a digital line position detection signal output from the microcontroller into an analog line position detection signal; And An amplifier for amplifying and outputting the analog line position detection signal; Line position detection apparatus using a light detection element, characterized in that made. The method of claim 1, And a rotation angle of the multiple cells of the line position detecting unit is 90 ° / (2n). N is the number of cells. The method of claim 1, When arranging one cell of the line position detecting unit in an array of n × m, 90 ° / (2n) diagonal lines are formed on a grid of horizontal and vertical equal intervals, and cells are formed on an intersection of vertical lines and diagonal lines. Line position detection apparatus using a light detection element, characterized in that. N is the number of cells. The method of claim 1, The microcontroller, As a result of determining the line thickness, when the line thickness is 1 mm or less, the digital line position detection signals inputted from neighboring cell blocks are compared, the difference is calculated, the line position is determined using the calculated value, and the line thickness is 1 mm or more. And determining the line position using the calculated value after comparing the digital line position detection signals input from neighboring cell blocks, and calculating the sum. delete A detection apparatus for detecting a position of a line displayed on an object by using a photodetector device, At least one of detecting a position of a line displayed on the object by generating a light emitting unit for emitting light on a line displayed on the object and generating an analog line position detection signal that is a voltage signal of incident light upon receiving the light emitted through the light emitting unit; A line position detector comprising an image sensor; A light emission driver for driving the light emitting unit to emit light in response to a control signal input from an outside; A line position detection driver for driving the line position detection unit in response to a control signal input from the outside; A first image receiver configured to output an analog signal input from the line position detector as an analog signal; A second image receiver configured to output an analog signal input from the line position detector as a digital signal; While outputting a control signal to the light emission driver and the line position detection driver, the position of the line is detected from the analog voltage signal input from the first image receiver, and the digital signal input from the second image reception is used to target the object. A microcontroller for determining the thickness of the displayed line; And An output circuit unit for converting the digital line position detection signal output from the microcontroller into an analog line position detection signal; Line position detection apparatus using a light detection element, characterized in that made. The method of claim 6, The light emitting device is provided to be spaced apart from the image sensor at a predetermined interval, and the line position detection device using a light detecting element, characterized in that the light is emitted to the upper portion of the line displayed on the object. The method of claim 6, The light emitting device is provided to face the image sensor spaced apart from each other, and is provided so that light is emitted to the lower portion of the line displayed on the object, And the image sensor receives light passing through the object to detect a position of the line of the object. The method of claim 6, The line position detection unit is composed of an image sensor and a lens coupled to one end of the image sensor, The light emitting portion has a through portion coupled to the lens, characterized in that a plurality of light source elements are arranged around the through portion, Light emitted by the light source element of the light emitting part is emitted to the linear part of the object, and the lens of the linear position detecting part receives the light reflected by the linear part to detect the position of the line of the object Line position detection device using output device. The method of claim 6, The line position detection unit may emit light to an object on which a line is displayed, and may be provided in parallel with the object to receive reflected light, a case in which the lens is fixedly coupled, and a lens inside the case. A total reflection prism provided to face the light source, a light emitting part provided inside the case so that light is emitted to the object through the total reflection prism, and the light emitted by the object is reflected to the lens and the total reflection prism. An image sensor provided inside the case to detect incident light; Line position detection apparatus using a light detection element, characterized in that consisting of. The method of claim 6, The line position detection unit includes a lens provided in parallel with the object to emit light to the object on which the line is displayed and to receive the reflected light, a pentaprism closely coupled to the lens, and the pentaprism And a light emitting part provided at a predetermined distance from the lower end of the pentaprism so that light may be emitted to the object through the lens, and to face the light emitting part and the pentaprism in parallel. Image sensor, Line position detection apparatus using a light detection element, characterized in that consisting of.

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