KR20150028166A - Shutter inspection apparatus and method for controlling the same - Google Patents

Abstract

The present invention relates to a shutter inspection apparatus including: a shutter driving part which drives a shutter having at least one partition; a detection part which detects a first light and a second light on the left and right received via the shutter; a control part which drives the shutter and the detection part if a shutter operation command is inputted, and judges whether the operation state of the partition prepared in the shutter is normal, by comparing a signal of the first light with a signal of the second light; and a display part which outputs the operation state of the partition prepared in the shutter. According to the present invention, the shutter inspection apparatus can judge normality or fault of the shutter easily, by being able to measure a slope of a front partition and a rear partition of the shutter quantitatively, and can adjust the slope of the front partition and the rear partition easily as to the faulty shutter by outputting the slope measurement result of the front partition and the rear partition of the shutter. Through this, the shutter inspection apparatus can improve quality of the shutter and furthermore, can improve quality reliability of a camera.

Description

[0001] Shutter inspection apparatus and method [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter inspection apparatus and a control method thereof for inspecting an operation state of a shutter to improve the quality of a shutter mounted in a camera.

Recently, a digital single lens reflex (DSLR) camera capable of taking professional-grade photographs has become popular.

Such a digital single-lens reflex camera has a mirror rotatable around an optical axis of the lens. That is, the subject light obtained from the lens is reflected from the mirror and imaged on the focus plate. At this time, the photographer can confirm the image of the subject image formed on the focus plate using the penta prism and the viewfinder.

And the mirror is raised to retract from the optical axis of the lens by rotating about the axis when the shutter-release signal is input. When the shutter is opened, an image of the subject is formed on the imaging element.

Such a single-lens reflex camera includes a shutter for passing light for a predetermined period of time in front of the image pickup device. Such a shutter is referred to as a focal plane shutter because it is in front of the image pickup device.

The Focal Plane Shutter includes a leading curtain and a trailing curtain.

Briefly explaining the operation, the imaging surface of the imaging element is opened by the running of the front curtain of the focal plane shutter, exposure of the subject incident through the lens is started, and the thick film runs with a time lag according to the shutter speed to end the subject photographing.

These focal plane shutters control the movement speed of the leading and trailing films to adjust the size of the slit formed between the leading and trailing films and determine the exposure time by adjusting the slit size. In this manner, by controlling the size of the slit, it is possible to expose an appropriate amount of light to the photosensitive member such as an imaging element.

In addition, as the performance of a camera used in a DSLR camera having a focal plane shutter or a mirrorless camera has become high performance and high performance, a shutter speed has also been required to have a super-high speed.

As the speed of the shutter is increased, the slit of the front curtain and the front curtain of the focal plane shutter becomes smaller, so that the curtain and the thick film are not mechanically horizontal. As a result, the exposure of the high shutter speed is affected. A problem arises in which the balance between the two is not matched.

The present invention provides a shutter inspection apparatus and a control method thereof for measuring a slope of an inner film and a thick film in a shutter during operation, inspecting whether or not the shutter is defective based on the measured slope, and displaying the inspection result.

A shutter inspection apparatus according to one aspect includes a shutter driving unit for driving a shutter provided with at least one film; A detector for detecting the first light and the second light on the left and right received through the shutter; A control unit for driving the shutter and the detection unit when the shutter operation command is inputted and comparing the signals of the detected first light and second light to determine whether the operation state of the film provided in the shutter is normal; And a display unit for outputting an operating state of the film provided in the shutter.

The control unit checks the time at which the detected first light signal changes and the time at which the second light signal changes, calculates the slope of the film based on the two confirmed times, and determines whether the film is normal based on the calculated slope do.

The time at which the signals of the first light and the second light are changed is a rising time or a polling time.

The shutter includes a leading film and a thick film, and the control section calculates the inclination of the leading film and the thick film, respectively.

The control unit outputs adjustment information of at least one film that is defective when it is determined that the operation state of at least one of the leading film and the thick film is defective.

The detecting unit includes: a light emitting unit having a plurality of light sources arranged left and right and outputting light toward the shutter; And a light receiving section having a plurality of light receiving elements disposed laterally and receiving light passing through the shutter.

A plurality of left and right light sources and a plurality of right and left light receiving elements are arranged at the same height with each other, and a plurality of right and left light sources face a plurality of right and left light receiving elements.

The control unit confirms the number of clock pulses between the time at which the detected first light signal changes and the time at which the second light signal changes, and calculates the slope of the film based on the number of clock pulses that have been confirmed and based on the calculated slope It is determined whether or not the film is normal.

The control unit may control the time difference between the time at which the detected first light signal changes and the time at which the second light signal changes, the predetermined time for moving the at least one film, Calculates the slope of at least one film based on the length, and determines whether the film is normal based on the calculated slope.

The control section calculates an angle of inclination of at least one of the membranes.

According to another aspect of the present invention, there is provided a method of controlling a shutter inspecting apparatus for inspecting an operation state of a front curtain and a thick curtain in a shutter operation, the method comprising the steps of: And detects the first light and the second light which are received during the shutter operation, and detects a time when the detected first light signal changes and a second light when the signal of the second light And determines whether the operation state of the front curtain and the back curtain is normal, and outputs the operation states of the curtain and the front curtain.

The operation states of the leading and trailing films are respectively determined by calculating the time difference by comparing the time when the signal of the first light changes and the time when the signal of the second light is changed and calculating the slope of the leading film and the thick film based on the calculated time difference, And the direction of the wind.

The operation states of the leading and trailing films are each determined by checking the number of clock pulses between the time at which the detected first light signal changes and the time at which the signal of the second light changes, And determining the inclination and the augmentation direction of the thick film, respectively.

The determination of the operating state of the prefilm is performed by calculating the moving speed of the shutter based on the moving time of the prefiltered film and the length of the moving area of the pregiven film in advance, A difference in length between the left and right sides of the line film is calculated based on a time difference between a time when the optical signal changes and a time when the signal of the second light changes, And calculating the angles of the curves.

The determination of the operating state of the thick film is made by calculating the moving speed of the shutter based on the predetermined moving time of the thick film and the predetermined length of the moving region of the thick film, The difference between the left and right lengths of the thick film is calculated based on the time difference between the time when the optical signal changes and the time when the signal of the second light changes, And calculating the aeration angle.

Judging the operating conditions of the leading and the thick film includes judging the inclination of the leading and the thick film, respectively, when the leading film and the thick film are located at the upper, middle, and lower portions, respectively.

According to the aspect, it is possible to quantitatively measure the inclination of the front curtain and the thick curtain of the shutter, so that it is possible to easily judge whether the shutter is normal or defective.

The slope of the leading film and the thick film can be easily adjusted with respect to the defective shutter by outputting the result of measuring the inclination of the leading film and the thick film of the shutter.

It is also possible to measure the angle accurately with respect to the inclination of the curtain when the curtain of the curtain of the shutter is inclined, thus ensuring the performance of the shutter. (Resolution 0.01 deg level is possible)

Also, by measuring the tilt, the quality of the thick film can be ensured when the electron beam film is applied.

This makes it possible to improve the quality of the shutter and further improve the quality reliability of the camera.

1 is an exemplary view of a shutter inspection apparatus according to an embodiment.
2 is a diagram illustrating an example of a layout between a shutter and a detector that is seated in the shutter inspection apparatus according to the embodiment.
3 is a front view and a rear view of a shutter to be inspected using the shutter inspection apparatus according to the embodiment.
4 is an exploded perspective view of the shutter shown in Fig.
5 is a control block diagram of the shutter inspection apparatus according to the embodiment.
6 is a control flowchart of the shutter inspection apparatus according to the embodiment.
7 is a diagram showing an example of the operating state of the shutter.
8 is a voltage waveform diagram corresponding to an optical signal received by each light receiving element during a shutter inspection using the shutter inspection apparatus according to the embodiment.
9 is a voltage waveform diagram corresponding to an optical signal received by each light receiving element during a shutter inspection using the shutter inspection apparatus according to the embodiment.
10 is a diagram illustrating an example of calculating a slope of a line film during a shutter inspection using the shutter inspection apparatus according to the embodiment.
11 is an exemplary view of shutter information output from the shutter inspection apparatus according to the embodiment.

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

FIG. 1 is an illustration of a shutter inspection apparatus according to an embodiment. The shutter inspection apparatus 200 is equipped with a shutter 100 for inspection.

The shutter 100 is installed just before the focal plane of the lens in the camera. The shutter 100 moves the front curtain and the rear curtain horizontally or vertically to adjust the slit of the curtain, Not shown) is adjusted.

The shutter inspection apparatus 200 is a device for inspecting the operation state of the shutter 100 to determine whether the shutter 100 is normal or defective before the shutter 100 is mounted in the camera (not shown).

The shutter inspection apparatus 200 includes a seat 210 on which the shutter 100 is seated and a detection unit 220 and 230 for detecting the operating state of the shutter 100 seated on the seat 210. Here, the detection unit includes a light emitting unit 220 for emitting light toward an operating shutter, and a light receiving unit 230 for receiving light emitted from the light emitting unit 220.

The shutter 100 is connected to a cable (not shown) of the shutter inspecting apparatus 200 for electrical connection with the shutter inspecting apparatus after being placed on the seat 210 of the shutter inspecting apparatus 200. That is, the shutter 100 receives a driving signal from the shutter driving device through the cable.

The arrangement structure of the shutter unit 100 and the light emitting unit 220 and the light receiving unit 230 that are seated on the shutter inspection apparatus 200 will be described with reference to FIG.

2, the light emitting unit 220 includes a plurality of light sources 221, a plurality of light sources 221, and a plurality of stages (not shown) for adjusting the positions of the X, Y, and Z axes of the light sources 221, Lt; / RTI >

In addition, the light emitting unit 220 includes six light sources in three rows, i.e., left and right two rows and upward.

The light source outputs light of uniform brightness such as a semiconductor laser He-Ne laser, a halogen lamp, and an LED lamp.

The light source can maintain a uniform output, and it is also possible to have an oscillator capable of emitting light while oscillating at a high frequency of about 100 kHz to 10 MHz.

The light emitting portion may further include a lens portion for minimizing the size of light emitted from the shutter film and transmitting light to the light receiving portion.

The light receiving section 230 includes a plurality of light receiving elements 231 corresponding to a plurality of light sources and a panel 232 on which a plurality of light receiving elements are arranged. Here, the plurality of light receiving elements 231 are also divided into two rows, that is, six columns in total, three rows in the upper and lower rows.

The light receiving element of the light receiving section includes a device capable of detecting a difference in output of a light source such as a photodiode or a phototransistor.

Further, the light-receiving element of the light-receiving portion can use a high-sensitivity element, that is, an element having a response speed of 10 microseconds or less, so as to detect not only the moment of interruption of the light source having a constant output but also the moment of interruption of the light source oscillating at a high frequency.

The light receiving unit may further include a lens unit that allows light passing through the shutter film to be properly transmitted to the light receiving element.

The shutter 100 is disposed between the light emitting portion 220 provided with a plurality of light sources and the light receiving portion 230 provided with a plurality of light receiving elements.

The shutter 100 moves at least one film when an operation signal is input. Wherein at least one of the membranes includes a leading membrane 120 and a thick membrane 130. At this time, at least one light of the plurality of light sources emitted from the light emitting unit 220 is received by the light receiving unit 230 after being passed through the slit between the front curtain and the rear curtain, or is blocked by the curtain or the front curtain. That is, the light blocked by the leading film or the thick film does not reach the light receiving portion 230.

First, the shutter 100 will be described with reference to Figs. 3 to 4. Fig.

FIG. 3 is a front view of the shutter and a back surface of the base plate 111 to be inspected using the shutter inspection apparatus according to the embodiment, and FIG. 4 is an exploded perspective view of the shutter shown in FIG.

The shutter 100 includes a body 110, a curtain 120, a thick film 130, and a driving assembly 140.

The body 110 includes a base plate 111, a cover plate 112, and a separate plate 113.

The base plate 111 constitutes the base of the shutter 100. Each component such as a thick film, a separate plate, a lead film, and a cover plate is sequentially disposed on the base plate 111. [ An opening 114 is formed in a part of the base plate 111 and an imaging device (not shown) is arranged behind the opening 114. [

The cover plate 112 and the separate plate 113 are also formed with openings 114 and have the same size and position corresponding to the openings of the base plate 111. That is, the cover plate 112 and the opening 114 of the separate plate 113 are integral with the opening of the base plate 111.

The opening 114 is an area opened and closed by the leading film 120 and the thick film 130, and is a moving region of the leading film and the thick film. The size of the opening 114 corresponds to the size of the moving area of the front curtain and the thick curtain.

The base plate 111 is coupled to the cover plate 112 and the lead film 120 and the thick film 130 are disposed in the inner space formed by the coupling of the base plate 111 and the cover plate 112. That is, the base plate 111 and the cover plate 112 prevent the leading film 120 and the thick film 130 from separating from each other.

The cover plate 112 includes a fixing hole in which a link of the leading membrane, a hinge provided in the link of the thick film is rotatably fixed, and a fixing hole in which the driver shaft of the lever of the leading membrane and the lever of the thick film are rotatably fixed .

The cover plate 112 further includes a guide hole 115 for guiding link movement of the linkage film and the thick film.

The separate plate 113 guides the front curtain 120 and the rear curtain 130 while traveling and prevents the front curtain 120 and the rear curtain 130 from interfering with each other.

The separate plate 113 includes a through hole through which the driver shaft of the levers of the leading membrane and the lever of the thick membrane penetrates.

Further, the separate plate 113 further includes a guide hole 115 for guiding the link movement of the linkage and the thick film of the line film. The position of the guide hole 115 of the separate plate 113 corresponds to the position of the guide hole 115 of the cover plate 112.

That is, the axis of the lever 142a and the lever 142b on the base plate 111 are extended to the fixing holes of the cover plate 112 after passing through the through holes of the separate plate 113 .

The lever 142a of the linear membrane disposed on the base plate 111 is connected to the pinhole 123 of the link of the linear membrane after passing through the guide hole 115 and the lever 142b of the thick membrane is also passed through the guide hole And then connected to the pinhole 133 of the thick film link.

That is, guide holes are formed in the base plate 111, the cover plate 112 and the separate plate 113. The guide holes are moved in accordance with the driving of the lever 142a of the leading membrane and the lever 142b of the thick membrane Thereby guiding the movement path of the link 122 of the leading membrane and the link 132 of the thick membrane.

The front curtain 120 and the rear curtain 130 are each formed of a curtain or a metal film. The lead film 120 and the thick film 130 are disposed adjacent to each other to control opening and closing of the opening 114.

That is, if the leading film 120 and the thick film 130 are arranged close to each other and there is no gap between the leading film 120 and the thick film 130, the opening 114 is closed and the leading film 120 and the thick film 130 Are separated from each other, the opening 114 is opened.

The front curtain 120 and the rear curtain 130 are disposed on opposite sides of the separate plate 113.

The front curtain 120 includes a plurality of blades 121 and a plurality of links 122 connecting the plurality of blades 121. The thick film 130 also includes a plurality of blades 131 and a plurality of blades 131 (Not shown).

Wherein at least one link 122 of the plurality of links of the leading membrane includes a pinhole 123, the pinhole 123 is connected to the connecting pin of the lever of the membrane, and at least one of the plurality of links of the thick membrane is connected to a pinhole 133 and the pinhole 133 is connected to the connection pin of the lever of the thick film.

The link 122 of the leading membrane and the link 132 of the thick membrane are moved by the connecting pins of the respective levers connected through the guide holes formed in the base plate 111, the cover plate 112 and the separate plate 113 .

The driving assembly 140 includes a cam 141, a lever 142, and a gear 143 for moving the curtain 130 and the curtain 130.

The cam 141 is disposed on the base plate 111 and is rotatable about an axis.

The outer peripheral surface of the cam 141 is formed with a groove having a shape to be engaged with the gear 143b of the gear portion 143 and is rotated by the driving force provided by the motor 143a of the gear portion 143. [ (Not shown) and a thick film driving member (not shown) are formed on the rear surface of the cam 141 so that the opening and closing operations of the curtain 120 and the thick film 130 are performed in accordance with the rotation of the cam 141 Respectively.

The position of the leading film lever is changed by the leading film driving member of the cam and the position of the thick film lever is changed by the thick film driving member.

The lever portion 142 includes a fore film lever 142a and a thick film lever 142b.

The fore film lever 142a and the thick film lever 142b move along the guide hole 115 by the rotational force of the cam 141. [

More specifically, the curtain lever 142a is disposed on the base plate 111 and is formed to be rotatable about an axis. The leading film lever 142a is disposed between the cam 141 and the leading film 120 and transmits the rotational force of the cam 141 to the leading film 120 so that the leading film 120 rotates in accordance with the rotation of the cam 141 .

The thick film lever 142b is disposed on the base plate 111 and is rotatable about an axis. The thick film lever 142b is disposed between the cam 141 and the thick film 130 and transmits the rotational force of the cam 141 to the thick film 130 so that the thick film 130 rotates in accordance with the rotation of the cam 141 .

The lever portion 142 further includes a leading film magnet 142c provided on one side of the leading film lever 142a and a thick film magnet 142d provided on one side of the thick film lever 220. [

The front curtain magnet 142c and the thick curtain magnet 142d act as a magnet when they are energized.

When the leading membrane magnet 142c and the thick membrane magnet 142d serve as an electromagnet, the magnetic force provided by the leading membrane magnet 142c and the thick membrane magnet 142d causes the leading membrane lever 142a and the thick membrane lever 142b So that the leading film 120 and the thick film 130 are not lowered due to their own weight but held at their fixed positions.

The gear portion 143 includes a motor 143a and a gear 143b.

The motor 143a generates a driving force for rotating the cam 141. [

It is also possible that one or more lines of thread are formed on the outer circumferential surface of the gear 143b and grooves are repeatedly formed on the outer circumferential surface of the cam 141. [

The gear 143b is coupled to the shaft of the motor 143a and transmits the driving force generated by the motor 143a to the cam 141 to convert the driving force of the motor 143a into rotational motion of the cam 141 .

The shutter 100 operates in a state in which white light is incident on the front surface of the shutter 100. At this time, the front curtain 130 descends while the front curtain 120 descends first and maintains a predetermined shutter speed interval, Instant light comes in.

At this time, the shutter inspecting device measures the time that light enters the light receiving unit 230, measures the exposure amount corresponding to the set exposure time, measures the exposure time of the shutter, and determines the position of the upper, middle, , The intensity of the right light is measured, and the degree of horizontal deviation of the front curtain and the thick curtain of the shutter is estimated by using the optical signal with time.

In this way, it is possible to accurately evaluate the inclination of the curtain of the curtain of the shutter when the super high-speed shutter is implemented, so that the curved curtain and the thick curtain can be corrected to be horizontal when the curtain is curved.

5 is a control block diagram of the shutter inspection apparatus according to the embodiment.

The shutter inspection apparatus 200 includes a detection section D for detecting an operation state of the shutter 100 that is seated on the mount section 210. The detection unit D includes a light emitting unit 220 that emits light toward the shutter 100 in operation and a light receiving unit 230 that receives light emitted from the light emitting unit 220.

The light emitting unit 220 of the shutter inspection apparatus 200 includes a stage driving unit 223 for driving each stage 222 to adjust the positions of the plurality of light sources 221 respectively, And a driving unit 224.

The shutter inspecting apparatus 200 may further include an A / D converting unit (not shown) for converting a light receiving signal input from each light receiving element of the light receiving unit 230 into a digital signal.

The shutter inspection apparatus 200 further includes an input unit 240 for receiving inspection commands and inspection conditions, a control unit 250 for determining whether the front and rear films are normally operated based on the optical signals received by the light receiving unit 230, A shutter drive unit 260 for driving the shutter, a storage unit 270 for storing reference information for determining a normal operation of the shutter, and a display unit 280 for outputting a determination result.

More specifically, the input unit 240 receives the shutter operation command for the shutter inspection and receives the exposure time from the inspection conditions.

The exposure time here changes the width of the slit between the leading and the thick film. That is, the larger the exposure time, the larger the width of the slit.

The control unit 250 controls the speed of the shutter 100 based on the exposure time and the input exposure time when the shutter operation command is input. That is, the control unit 250 adjusts the movement time of the front curtain and the curtain of the shutter based on the exposure time.

The control unit 250 controls the operation of the plurality of light sources of the light emitting unit 220 during the shutter operation and outputs a plurality of optical signals from the light receiving unit 230 to the plurality of light receiving elements 231 of the light receiving unit 230 It is determined whether movement of the front curtain and the back curtain is normal based on a plurality of optical signals transmitted and received.

At this time, the control unit 250 compares the received optical signals with a pair of right and left light receiving elements provided at the same height, and determines whether movement of the front curtain and the thick curtain of the shutter is normal based on information according to the comparison result. That is, the control unit 250 compares the optical signals received from the pair of right and left light receiving elements on the upper side, compares the optical signals received from the right and left pair of light receiving elements on the center, Thereby comparing the optical signals.

Here, comparing the received optical signals to a pair of right and left light receiving elements provided at the same height and acquiring information according to the comparison result includes any of the following.

(1) The time difference is calculated by comparing the rising time of the optical signal received by the left light receiving element with the rising time of the optical signal received by the right light receiving element. It is also possible to use a falling time of each optical signal.

Thus, the slope of each film can be determined by detecting the opening time and the closing time of the curtain film and the thick film corresponding to the rising time and the polling time of the signal detected by each light receiving element.

(2) The number of clock pulses between the rising time of the optical signal received by the left light receiving element and the rising time of the optical signal received by the right light receiving element is checked. It is also possible that the shutter inspection apparatus further includes an oscillator for outputting a pulse signal of a predetermined frequency.

(3) The slope of the left / right curtain (or thick film) is calculated using the time difference calculated in (1) and the moving speed of the shutter.

In addition, the controller 250 receives an optical signal from a digital oscilloscope (not shown) that measures intensity of light with time.

In addition, the control unit 250 transmits a driving signal to the stage driving unit 223 so that the positions of the plurality of light sources in the light emitting unit are adjusted before the shutter is inspected. That is, by adjusting the positions of the plurality of light sources in the light emitting section to coincide with the position of the light receiving element of the light receiving section, it is possible to increase the accuracy in determining whether the shutter operation state is normal or not.

The shutter driving unit 260 transmits a driving signal to the motor 143a in response to a command from the controller 250. [ That is, the shutter driving unit 260 drives the motor 143a provided in the shutter driving assembly 140 to control the movement of the front curtain 120 and the thick curtain 130 of the shutter.

The storage unit 270 stores reference information for determining whether the operation states of the front curtain and the back curtain are normal. Here, the reference information is at least one of a reference time difference, a reference pulse number, and a reference angle range (reference slope).

In addition, the storage unit 270 may store the tilt of the front curtain and the thick curtain of the inspected shutter.

The display unit 280 displays a result of determining the operating state of the shutter. That is, the display unit 280 indicates the normal or bad state of the shutter.

In addition, the display unit 280 may output adjustment information of the shutter when the operation state of the shutter is poor. Here, the adjustment information includes an adjustment part, a degree of adjustment, an adjustment method, and the like required in the connection part between the blade and the link of the leading or thick film.

The display unit 280 is an output unit for outputting the result of inspection of the shutter, and it is also possible to output the inspection result by sound instead of the display unit.

In addition, the display unit 280 can display the positions of the front curtain and the rear curtain measured by the light receiving elements on the right and left sides of the upper and lower heights, respectively.

6 is a control flowchart of the shutter inspection apparatus according to the embodiment. This will be described with reference to Figs. 7 to 11. Fig.

First, the inspector puts the shutter 100 for inspection on the seat 210 of the shutter inspection apparatus 200 and connects a cable (not shown) to the shutter 100 for driving signal transmission.

At this time, the shutter 100 is mechanically and electrically connected to the shutter inspection apparatus 200.

The shutter inspection apparatus 200 can adjust the positions of the plurality of light sources in the light emitting section before the shutter inspection.

The shutter inspecting apparatus 200 receives a shutter operation command 301 for inspecting the shutter through the input unit 240. [

The shutter inspecting apparatus 200 transmits a driving signal to the motor 143a of the shutter 100 when a shutter operation command for inspecting the shutter is inputted through the input unit 240. [

That is, the shutter inspecting apparatus 200 moves the front curtain and the thick curtain of the shutter 100 based on the exposure time inputted through the input unit 240.

At this time, the shutter 100 first descends the leading film 120, descends the thick film 130 while maintaining the shutter speed, and forms a slit between the leading film and the thick film during the descending operation of the leading film and the thick film.

In addition, the shutter inspection apparatus 200 drives (302) a plurality of light sources in the light emitting unit to output light through the plurality of light sources 212.

At this time, the plurality of light sources can be driven sequentially by the height and height according to the movement path of the front curtain and the rear curtain, and it is also possible to output light by periodically driving simultaneously.

The light output from the light emitting unit 220 of the shutter inspection apparatus 200 is directed to the shutter 100 and a part of the light directed toward the shutter 100 is blocked by the thick film or the front curtain and can not pass through the shutter 100, The remaining part of the light reaches the light receiving part 230 after passing through the front curtain or the thick film.

2, assuming that the opening 114 of the shutter is completely opened, the light output from the upper left light source is received by the upper left light receiving element TL, and the light from the upper right light source And the output light is received by the light receiving element TR on the upper right side.

The light outputted from the light source on the left side of the center portion is received by the light receiving element ML on the left side of the center portion and the light outputted from the light source on the right side of the center portion is received by the light receiving element MR on the right side of the center portion.

The light output from the light source of the lower left is received by the light receiving element DL of the lower left and the light output by the light source of the lower right is received by the light receiving element DR of the lower right.

The plurality of light receiving elements are such that light is intercepted or received depending on the position of the front curtain or the rear curtain which opens and closes the opening of the shutter.

The shutter inspecting apparatus 200 detects (303) the optical signal received by the plurality of light receiving elements of the light receiving section 230.

That is, the shutter inspection apparatus 200 detects the time and light intensity at which light is received. At this time, the shutter inspection apparatus 200 detects light intensities of left and right (L, R) by height of the top, middle, and down.

That is, the optical signals received by the upper left and right light receiving elements are compared to determine the inclination of the front and back films at the upper part, and the received light signals are compared with the light receiving elements at the center to determine the inclination of the front and rear films at the center And the optical signals received by the lower right and left light receiving elements are compared with each other to determine the tilt of the front curtain and the thick curtain at the bottom.

It is also possible to use a digital oscilloscope (not shown) for measuring the intensity of light with respect to time.

The shutter inspection apparatus 200 determines the defects of the front curtain and the back curtain using the optical signal according to time.

More specifically, the shutter inspection apparatus 200 compares the received optical signals to a pair of right and left light receiving elements provided at the same height (step 304). Based on the information based on the comparison result, the movement of the front curtain and the rear curtain of the shutter is normal (305).

For example, when the front curtain operates in a steady state, the curtain moves while maintaining the left and right horizontal, but when the curtain is operated in a defective state, the curtain moves to a tilted state without maintaining horizontal left and right. Accordingly, the reception and blocking time of the light received by the left and right light receiving elements in the upper, middle, or lower portions becomes different.

That is, when the front curtain is tilted to the left side, the light received by the left light receiving sensor is blocked first, and then the light received by the right light receiving sensor is blocked.

In this way, it is possible to judge the failure of the front curtain or the rear curtain based on the light signal received by the right and left light receiving elements.

Here, comparing the received optical signals to a pair of right and left light receiving elements provided at the same height and acquiring information according to the comparison result includes any of the following.

(1) An example will be described with reference to Figs. 7 and 8. Fig.

7 is a diagram showing an example of the operating state of the shutter.

As shown in FIG. 7, it is assumed that the thick film 130 is operated normally when the thick film 130 moves downward.

As shown in FIG. 7, the operating state of the shutter is a state in which the thick film is lowered in the middle of the opening 114 with the thick film moving downward.

The plurality of light sources output light during operation of the thick film, and the light is received by the right and left light receiving elements according to the height of the medium, and the right and left light receiving elements corresponding to the height of the medium output a voltage signal corresponding to the received light intensity.

8 is a voltage waveform diagram corresponding to an optical signal received by each light receiving element in a position P section of the thick film in the shutter operation.

As shown in FIG. 8 (a), the light receiving elements TL and TR positioned on the left and right of the upper portion are blocked by the shutter while the thick film is located in the section P, and no light is received. Therefore, the upper left and right light receiving elements TL and TR output a voltage of approximately 0 V when the thick film is positioned in the P section.

As shown in FIG. 8 (b), the light receiving elements ML and MR located on the right and left sides of the central portion receive light all when the thick film is located on P1. Therefore, the light receiving elements ML and MR output a voltage of a predetermined magnitude corresponding to the intensity of the received light.

When the thick film is positioned at P2, the light receiving element ML on the left side of the center receives light through a part, and the light receiving element MR on the right side of the center receives light through the entire part. Therefore, the light receiving element ML outputs a voltage corresponding to the intensity of light received in a part, and the light receiving element MR outputs a voltage of a constant magnitude corresponding to the intensity of the light received in the entire part.

When the thick film is positioned at P3, the light receiving element ML on the left side of the center does not receive light with the light shielded by the thick film, and the light receiving element MR on the right side of the center receives light through a part thereof. Therefore, the light receiving element ML outputs a voltage of approximately 0v, and the light receiving element MR outputs a voltage of a predetermined magnitude corresponding to the intensity of light received in a part.

When the thick film is further lowered and positioned at P4, the light receiving elements (ML, MR) located at the left and right of the center portion are not received with the light shielded by the thick film.

Therefore, the light receiving elements ML and MR on the left and right sides of the center output a voltage of approximately 0 V when the thick film is located in the section P4.

As shown in (c) of FIG. 8, the light receiving elements DL and DR positioned at the lower left and right sides are received while light is received by the shutter while the thick film is positioned in the P section, And outputs a voltage of a predetermined magnitude corresponding to the intensity of light.

The shutter inspection apparatus 200 predicts the slope of the thick film using the signals output from the right and left light receiving elements according to the vertical height.

A method of predicting the inclination of the thick film at the center of the shutter will be described with reference to Fig. 8 (b).

The shutter inspecting apparatus 200 detects a falling time t1 of a signal received at the light receiving element ML on the left side of the center and a polling time t2 of a signal received at the light receiving element MR on the right side of the center, To calculate the time difference? T.

The next shutter inspection apparatus 200 compares the calculated time difference with the reference time difference and determines that the operation state of the thick film is defective if the calculated time difference is equal to or greater than the reference time difference.

The shutter inspecting apparatus 200 confirms the polling time t1 of the output signal of the left light receiving element and confirms the polling time t2 of the output signal of the right light receiving element and outputs the right polling time t1 at the left polling time t1 t2 is equal to 0, it is determined that the thick film is in a horizontal state. If the time difference? t is a positive value, it is determined that the thick film is inclined to the right. If? t is negative Value, it is judged to be inclined to the left.

Here, the positive value of the time difference? T means that the light received by the right light receiving element is cut off earlier than the light received by the left light receiving element due to the faster fall of the right side of the thick film. That is, the polling time t1 is longer than the polling time t2.

On the contrary, the negative value of the time difference? T means that the light received by the left light receiving element is cut off earlier than the light received by the right light receiving element due to the faster fall of the left side of the thick film. That is, the polling time t1 is shorter than the polling time t2.

It is also possible to use the rising time (Rising Time) of the voltage signal corresponding to each optical signal.

(2) Another example will be described with reference to Fig. 7 will be described together.

As shown in FIG. 7, it is assumed that the thick film 130 is operated normally when the thick film 130 moves downward.

As shown in FIG. 7, the operating state of the shutter is a state in which the thick film is lowered in the middle of the opening 114 with the thick film moving downward.

9 is a voltage waveform diagram corresponding to an optical signal received by each light receiving element in a position P section of a thick film in a shutter operation.

First, the shutter inspection apparatus 200 drives a plurality of light sources based on a pulse signal (Clock signal) of a predetermined frequency. Here, the predetermined frequency is approximately 1 MHz.

That is, the plurality of light sources output light based on the clock signal while the thick film is operating, and at this time, the light is received by the right and left light receiving elements according to the height of the medium, do.

The process of determining the slope of the thick film at the center of the slope of the thick film according to the height of the medium will be described as an example.

The light receiving elements ML and MR located on the left and right sides of the center part output signals as shown in FIG. 9 when the thick film moves in the P section. At this time, a clock signal is output.

The shutter inspecting apparatus 200 checks the polling time t1 of the signal received by the light receiving element ML on the left side of the center portion and the polling time t2 of the signal received by the light receiving element MR on the right side of the center portion do.

The next shutter inspecting apparatus 200 checks the number of pulses between two polling times, compares the number of confirmed pulses with the number of reference pulses, and determines that the operation state of the thick film is defective if the number of confirmed pulses is equal to or greater than the reference pulse number.

The shutter inspection apparatus 200 determines that the thick film is horizontal when the number of confirmed pulses is 0, and if the number of pulses is equal to or greater than the reference pulse number while the polling time t2 is longer than the polling time t1, If it is determined that the polling time t2 is shorter than the polling time t1 and the number of pulses is equal to or greater than the reference pulse number, it is determined that the thick film is inclined to the right.

It is also possible to know the time difference between the polling time t1 and the polling time t2 based on the number of pulses between the polling time t1 and the polling time t2.

It is also possible to predict the tilt angle based on the number of pulses between the polling time t1 and the polling time t2.

It is also possible to use the rising time (Rising Time) of the voltage signal corresponding to each optical signal.

(3) Another example will be described with reference to Fig. A process for determining whether or not the leading membrane is normal will be described.

The shutter inspecting apparatus 200 detects a falling time t1 of a signal received at the light receiving element ML on the left side of the center and a polling time t2 of a signal received at the light receiving element MR on the right side of the center, To calculate the time difference? T (see FIG. 8 (b)).

When the movement time of the pre-set line film is T, the shutter moving speed V is as follows.

Velocity V = Vertical length (X) of opening / Travel time (T)

The next shutter inspecting apparatus 200 calculates the lateral difference DELTA X of the line film using the calculated time difference and the shutter moving speed and calculates the difference between the calculated length difference and the size of the opening 114 The yaw angle? Of the line curtain is calculated based on the length Y of the line. The calculation method of the left and right length difference DELTA X and angle [theta] is as follows.

The difference in length between left and right (DELTA X) = V x DELTA t

Angle? = Atan (? X / Y)

The next shutter inspection apparatus compares the calculated angle with the reference angle range and judges that the operation state of the thick film or the front film is defective when the calculated angle deviates from the reference angle range.

In addition, the tilt direction of the line film can be determined by whether the time difference is a positive value or a negative value (see FIG. 8B).

The next shutter inspecting apparatus 200 displays (306) the result of determining the shutter operating state through the display unit. That is, the display unit 280 displays the moving state of the front curtain and the front curtain detected by the left and right light receiving elements of the upper part, the moving state of the curtain detected by the right and left light receiving elements of the center, The moving state of the thick film, and the like, and also indicates whether the operating state of the front curtain and the thick curtain of the shutter is normal or poor.

11, the shutter inspection device displays the slope g1 of the leading film 120, the inclination g2 of the thick film 130, and the like, and displays the shutter moving speed. The left and right slit intervals s1 and s2 ).

Here, the indication of the inclination of the leading and the thick film can be displayed by the height and height.

Displaying the left and right slit intervals indicates the slit interval between the leading and the thick film, and shows the slit interval s1 at the left side and the slit interval s2 at the right side.

In addition, the display unit 280 may output adjustment information of the shutter when the operation state of the shutter is poor. Here, the adjustment information includes an adjustment part, a degree of adjustment, an adjustment method, and the like required in the connection part between the blade and the link of the leading or thick film.

The display unit 280 is an output unit for outputting the result of inspection of the shutter, and it is also possible to output the inspection result by sound instead of the display unit.

In addition, the display unit 280 can display the positions of the front curtain and the rear curtain measured by the light receiving elements on the right and left sides of the upper and lower heights, respectively.

100: shutter 200: shutter inspection device

Claims (16)

A shutter driving unit for driving a shutter provided with at least one film;
A detector for detecting the first light and the second light on the left and right received through the shutter;
A control unit for driving the shutter and the detection unit when the shutter operation command is inputted and comparing the signals of the first light and the second light to determine whether the operation state of the film provided in the shutter is normal;
And a display unit for outputting an operation state of the film provided on the shutter. The apparatus of claim 1,
Determining a time at which the detected signal of the first light changes and a time at which the signal of the second light is changed, calculating a slope of the film based on the two confirmed times, and determining, based on the calculated slope, A shutter detecting device for judging whether or not the shutter is opened. 3. The method of claim 2, wherein the time at which the signals of the first light and the second light are changed,
A shutter inspection device that is a rising time or a polling time. 3. The method of claim 2,
Wherein the shutter includes a leading film and a thick film,
Wherein the control unit calculates a tilt of the front curtain and the back curtain respectively. 5. The apparatus of claim 4,
And outputs adjustment information of at least one film which is defective if it is determined that the operation state of at least one of the front curtain and the rear curtain is bad. The apparatus according to claim 1,
A light emitting unit having a plurality of right and left light sources and outputting light toward the shutter;
And a light receiving section having a plurality of light receiving elements disposed laterally and receiving light passing through the shutter. The method according to claim 6,
The left and right light sources and the right and left light receiving elements are arranged at the same height,
Wherein the left and right light sources face the left and right light receiving elements, respectively. The apparatus of claim 1,
The method comprising: confirming a number of clock pulses between a time at which the detected first light signal is changed and a time at which the signal for the second light is changed; calculating a tilt of the film based on the determined number of clock pulses; And determines whether or not the film is normal. The apparatus of claim 1,
A time difference between a time at which the signal of the first light is changed and a time at which the signal of the second light is changed, a movement time of the at least one film determined in advance, Calculating a slope of the at least one film based on the length and determining whether the film is normal based on the calculated slope. 10. The apparatus according to claim 9,
Wherein the at least one film calculates an angle of incidence. A control method for a shutter inspection apparatus for inspecting an operation state of a front curtain and a back curtain in a shutter operation,
Wherein when the shutter operation command is input, a driving signal is transmitted to the shutter,
Outputting the left and right first light and the second light toward the operating shutter,
A first light and a second light received in the shutter operation are detected,
Determining whether the operating state of the front curtain and the back curtain is normal by checking the time at which the detected first light signal changes and the time at which the second light signal is changed,
And outputs an operation state of the front curtain and the back curtain. 12. The method of claim 11, wherein determining the operating states of the front and rear films, respectively,
A time difference is calculated by comparing a time when the signal of the first light changes and a time when the signal of the second light is changed,
And determining a slope and an augmentation direction of the front curtain and the rear curtain based on the calculated time difference. 12. The method of claim 11, wherein determining the operating states of the front and rear films, respectively,
Checking the number of clock pulses between a time when the detected first light signal changes and a time when the second light signal is changed,
And determining a slope and an augmentation direction of the front curtain and the rear curtain based on the number of clock pulses detected. 12. The method according to claim 11,
The movement speed of the shutter is calculated on the basis of the movement time of the predetermined film and the length of the movement region of the film,
Calculating a difference between right and left lengths of the prefilm based on a time difference between the calculated moving speed of the shutter and a time at which the detected first light signal changes and a time at which the second light signal changes,
Calculating an inclination angle of the prefilm based on a difference in length of the prefilm and a length in a transitional region of the at least one film. 12. The method of claim 11, wherein determining the operating state of the thick film comprises:
The moving speed of the shutter is calculated on the basis of the moving time of the predetermined thick film and the predetermined length of the moving region of the thick film,
Calculating a lateral difference of the thick film based on a time difference between the calculated moving speed of the shutter and a time at which the detected first light signal changes and a time at which the second light signal changes,
And calculating a tilt angle of the thick film based on a difference in length of the thick film and a width of a region in which the at least one film moves. 12. The method of claim 11, wherein determining the operating states of the front and rear films, respectively,
And determining a slope of the leading film and the thick film when the leading film and the thick film are located at the top, middle, and bottom, respectively.

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