JP2023055651A - Management unit, management program, and management method - Google Patents

Abstract

To efficiently inspect whether or not there is any abnormal light source in a light irradiator provided with light sources which are a large number of LEDs or LDs.SOLUTION: A movement control unit 51 moves a light receiver 11 sequentially to measurement positions M predetermined respectively for a plurality of light source groups consisting of a predetermined number of light sources, and a light source control unit 52 turns on the light source group corresponding to the measurement position M where the light receiver 11 is located, an abnormality determination unit 53 determines whether or not any abnormal light source is included in the lighted light source group, and when the abnormality determination unit 53 determines that some abnormal light source is included in the light source group, the light source control unit 52 turns on some of the predetermined number of light sources that constitute the light source group.SELECTED DRAWING: Figure 7

Description

The present invention relates to a management unit, a management program, and a management method used for a light irradiator.

2. Description of the Related Art Conventionally, a line light illuminator that emits line-shaped light from a large number of light sources such as LEDs arranged in a row is sometimes used for visual inspection of a work (Patent Document 1).

When using such a light irradiator, if an abnormal light source such as a light source that cannot be turned on or a light source that is darker than other light sources is included in a large number of light sources, it will cause illuminance unevenness along the longitudinal direction. For example, if an attempt is made to secure inspection accuracy using this light irradiator, it is necessary to manage the presence or absence of an abnormal light source.

However, turning on a large number of light sources one by one to check for abnormalities takes time and effort.
Such a problem is not limited to those in which the light sources are arranged in a row, but is a problem commonly occurring in a light irradiator having a large number of light sources, such as a ring lighting device in which the light sources are arranged in an annular shape.

JP 2017-150875 A

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and its main object is to enable efficient inspection of the presence or absence of abnormal light sources in a light irradiator equipped with a large number of light sources. is.

That is, a management unit according to the present invention is a management unit used in a light irradiator in which a plurality of light sources are arranged along a predetermined arrangement direction, and includes a light receiver for receiving light from the light sources, a movement control unit for moving one of the illuminator or the light receiver relative to the other along the arrangement direction; a light source control unit for turning on or off the light source; a detection value detected by the light receiver and a predetermined an abnormality determination unit that determines whether or not there is an abnormal light source by comparing the light source with a reference value;
In this management unit, the movement control section moves the light irradiator or the light receiver to predetermined measurement positions for each of a plurality of light source groups consisting of a predetermined number of the plurality of light sources. The light source control unit turns on the light source group corresponding to the measurement position where at least the light irradiator or the light receiver is located, and the abnormality determination unit detects an abnormality in the lighted light source group. determining whether or not a light source is included in the light source group, and if the abnormality determination unit determines that the light source group includes an abnormal light source, the light source control unit determines the predetermined number of light sources that constitute the light source group; is characterized by lighting at least part of the

According to the management unit configured in this manner, first, the light source group is turned on, and it is determined whether or not the light source group includes an abnormal light source. , at least a part of the light sources constituting the light source group is turned on, so that an abnormal light source can be efficiently found rather than turning on the light sources one by one. Examples of light sources include LEDs and LDs, but are not limited to these.

In a state in which the light source control unit turns on at least a part of a predetermined number of light sources constituting the light source group, the abnormality determination unit determines whether or not the light sources include an abnormal light source. is preferred.
With this, an abnormal light source can be automatically identified from among a large number of light sources.

By the way, when a plurality of light source groups are turned on one after another in the order in which they are arranged, while one light source group is being turned on, the light source groups adjacent to that one light source group may be thermally affected. This thermal effect can cause variations in irradiance.
Therefore, it is preferable that the light source control unit, after lighting one of the light source groups, light the other light source groups that skip the light source group adjacent to the one light source group.
In this case, variations in irradiance when the light source group is turned on can be suppressed, and the presence or absence of an abnormal light source can be determined more accurately.

Preferably, the respective reference values used for the plurality of light source groups are equal to each other.
In this case, one value can be used as the reference value, so that data processing can be simplified and memory capacity can be reduced.

By the way, as the light irradiator, for example, in order to improve the light extraction efficiency, a reflecting mirror is provided outside the light source located at the end in the arrangement direction to reflect the light emitted from the light source toward the light exit port. I have something ready. In addition, in order to increase the light output of the end portion, there are cases where the arrangement density of the light sources is increased or a light source with a higher output is arranged.
In such a case, if the number of light sources constituting the light source group is the same, the irradiance of the light emitted from the light source group at the ends in the arrangement direction is the same as that of the light emitted from the light source group at the center in the arrangement direction. It becomes larger than the irradiance, and the detection value detected by the photodetector is saturated.
Therefore, in order to prevent saturation of detected values, it is preferable that the number of light sources constituting the light source group at the ends in the arrangement direction is smaller than the number of light sources constituting the light source group at the center in the arrangement direction.

On the other hand, in cases other than the above, there is a risk that the irradiance at both ends of the light emitted from the light exit port will be low (that is, the light intensity will be low).
Therefore, in order to improve the uniformity of the detection values detected by the light receivers and to prevent the saturation of the detection values in the light source group in the central portion in the arrangement direction, the light source groups in the end portions in the arrangement direction are used. It is preferable that the number of light sources constituting the light source is larger than the number of light sources constituting the light source group in the central portion in the arrangement direction.

It is preferable that the reference value used for one of the light source groups is determined based on a detection value detected by the light receiver when the one light source group is lit in a normal state.
The detection value detected by the light receiver when the light source group is normally lit is a desired value determined by the specifications of the light irradiator. , etc., include initial values detected by the light receiver when the light source group is turned on, and values that can change over time as values required to ensure the performance of the light irradiator.
With this, it is possible to specify not only that one light source group includes light sources that cannot be turned on, but also that light sources that have deteriorated and become darker than normal are included. .

The reference value used for one of the light source groups is determined based on a detection value detected by the light receiver when the light source group other than the one light source group is turned on. is preferred.
In this case, it is possible to relatively compare the irradiance and the like of light emitted from a plurality of light source groups.

Further, a management program according to the present invention is a management program used for a light irradiator in which a plurality of light sources are arranged along a predetermined arrangement direction, wherein the light from the light irradiator or the light source is A movement control unit for moving one of the light receivers for receiving light relative to the other along the arrangement direction, a light source control unit for turning on or off the light source, a detection value detected by the light receiver, and a predetermined reference value The computer is made to exhibit a function as an abnormality judgment unit that judges whether or not there is an abnormal light source by comparing the The light irradiator or the light receiver is sequentially moved to predetermined measurement positions for each of a plurality of light source groups, and the light source control unit controls the measurement position where at least the light irradiator or the light receiver is positioned. and the abnormality determination unit determines whether an abnormal light source is included in the lighted light source group, and the abnormality determination unit determines whether the light source group has an abnormal light source. The light source control unit is configured to turn on at least a part of a predetermined number of light sources constituting the light source group when it is determined that the light source group is included.

Furthermore, a management method according to the present invention is a management method used for a light irradiator in which a plurality of light sources are arranged along a predetermined arrangement direction, wherein light from the light irradiator or the light source is received. a movement control step of moving one of the light receivers relative to the other along the arrangement direction; a light source control step of turning on or off the light source; and a detection value detected by the light receiver and a predetermined reference value. and an abnormality determination step of comparing and determining whether or not there is an abnormal light source, and in the movement control step, predetermined for each of a plurality of light source groups consisting of a predetermined number of the plurality of light sources. sequentially moving the light irradiator or the light receiver to the determined measurement position, and in the light source control step, turning on the light source group corresponding to the measurement position where at least the light irradiator or the light receiver is located; In the abnormality determination step, it is determined whether an abnormal light source is included in the lighted light source group, and if it is determined that an abnormal light source is included, a predetermined number of light sources constituting the light source group lighting at least part of the light source of the

According to such a management program and management method, it is possible to obtain the same effects as those of the management unit described above.

According to the present invention configured in this way, it is possible to efficiently inspect the presence or absence of an abnormal light source in a light irradiator having a large number of light sources.

FIG. 2 is a perspective view schematically showing a usage state of a management unit according to one embodiment; The side view which shows typically the usage condition of the management unit of the same embodiment. FIG. 4 is a top view schematically showing the usage state of the management unit of the same embodiment; Sectional drawing which shows typically the structure of the light receiving unit of the same embodiment. The perspective view which shows typically the structure of the linear motion apparatus of the same embodiment. FIG. 2 is a functional block diagram for explaining functions of the information processing apparatus according to the embodiment; The figure for demonstrating the operation|movement of the movement control part of the same embodiment. FIG. 4 is a flowchart for explaining the operation of the information processing apparatus according to the embodiment; The flowchart figure explaining operation|movement of the information processing apparatus of other embodiment. The figure for demonstrating the structure of the light source group of other embodiment.

An embodiment of a management unit according to the present invention will be described below with reference to the drawings.

<Device configuration>
The management unit 100 according to the present embodiment, as shown in FIG. 1, is used for management and inspection of a light irradiator X that emits, for example, linear or belt-shaped light (hereinafter also referred to as line light).

Before describing the management unit 100, the light irradiator X will be briefly described.
The light irradiator X is used, for example, for visual inspection of an object (work) such as a product in a factory by irradiating it with line light. The light irradiator X of this embodiment emits line light of UV light. As shown in FIG. 2, the light irradiator X has a plurality of light sources for emitting UV light arranged along a predetermined arrangement direction R. Here, the plurality of light sources are arranged in a row. ing. The light irradiator X may be one used for UV curing of a work. Examples of light sources include LEDs and LDs, but are not limited to these.

Next, the management unit 100 of this embodiment will be described.
As shown in FIGS. 1 and 2, the management unit 100 includes a light receiving unit 10 for receiving line light and a linear motion device for moving the light receiving unit 10 along the longitudinal direction of the line light (here, vertical direction). 20.

The management unit 100 here further includes an irradiation side mounting member 30 to which the light irradiator X is mounted, and a light receiving side mounting member 40 to which the light receiving unit 10 is mounted. The direction in which the irradiation-side mounting member 30 and the light-receiving side mounting member 40 face each other (here, the front-rear direction), and the width of the line light perpendicular to this direction and the longitudinal direction of the line light It is configured to be relatively movable in a direction (here, left-right direction).

The light receiving unit 10 uses, for example, an irradiance meter for detecting the irradiance of the line light. As shown in FIG. 3, the light-receiving unit 10 is arranged to face the light irradiator X attached to the irradiation-side mounting member 30. More specifically, it is an area irradiated with line light. It is arranged in the line light irradiation area Z. The line light irradiation area Z is an area including the optical axis L of the line light, and is an area through which the line light passes without the light receiving unit 10 .

The light receiving unit 10, as shown in FIG. 4, includes a light receiver 11 that accommodates the light receiving element of the irradiance meter. A light passage hole 10h for passing line light is formed in the front surface of the light receiver 11, and a light receiving element (not shown) is provided at a position facing the light passage hole 10h.

In the above-described configuration, when the light receiving element receives a line of light, a detection signal indicating the magnitude of the irradiance of the line of light is sent via wiring 12 (see FIG. 4) extending from the light receiver 11 to, for example, a dedicated or general-purpose sensor. Output to computer.

Next, the linear motion device 20 will be described.
As shown in FIG. 5, the linear motion device 20 moves the above-described light receiving unit 10 in a direction along the line light (vertical direction here). (not shown) and a linear motion mechanism 21 that movably supports the light receiving unit 10 . 5, for convenience of explanation, part of the irradiation-side mounting member 30 and the light-receiving-side mounting member 40 is omitted.

The linear motion mechanism 21 is for linearly moving the light receiving unit 10, and may include, for example, a linear rail, a linear guide, a ball screw, etc., and is arranged parallel to the longitudinal direction of the line light.

In the configuration described above, the linear motion device 20 of the present embodiment further includes a stage 22 that moves on the linear motion mechanism 21 as shown in FIGS. It is

More specifically, as shown in FIGS. 3 and 5, the stage 22 includes a leg portion 221 having a base end attached to the linear motion mechanism 21, and a leg portion 221 extending from the leg portion 221 toward the line light irradiation area Z. and an arm 222 extending along the length thereof. The tip of the arm 222 extends at least to the line light irradiation area Z, and the light receiving unit 10 is provided at, for example, the tip of the arm 222 .

Then, as shown in FIG. 6, the management unit 100 of the present embodiment moves the light receiver 11 described above, and based on the detection value of the light receiver 11, detects an abnormality in the light source constituting the light irradiator X. It further comprises an information processing device 50 for determining whether or not there is.

This information processing device 50 is physically a general-purpose or dedicated computer equipped with a CPU, memory, etc. Based on a management program stored in the memory, the CPU and its peripheral devices cooperate to As shown in FIG. 6 , it has at least the functions of a movement control section 51 , a light source control section 52 and an abnormality determination section 53 .

The movement control unit 51 moves one of the light irradiator X and the light receiver 11 relative to the other along the arrangement direction R of the light sources. That is, the movement control section 51 relatively moves one of the light irradiator X and the light receiver 11 with respect to the other.

As shown in FIGS. 6 and 7, the movement control section 51 of this embodiment controls the power supplied to the motor, which is the driving source of the linear motion device 20, to move the light receiver 11. FIG. Specifically, the movement control unit 51 is configured to move the light receiver 11 to a preset measurement position M and stop the light receiver 11 at the measurement position M for a predetermined time. However, the movement control unit 51 may continuously move the light receiver 11 at the measurement position M without stopping.

A measurement position M is a position where the light receiver 11 detects light from the light irradiator X. Here, as shown in FIG. is set.

More specifically, the plurality of light sources that constitute the light irradiator X are divided into a plurality of light source groups each made up of a predetermined number of light sources. A measurement position M is set corresponding to each of these light source groups. Although the number of light sources constituting each light source group is the same in each light source group here, it may be different in some or all of the light source groups. Also, although FIG. 7 shows a mode in which the light sources are arranged in a line, the light sources may be arranged in a plurality of lines.

As a method of setting the measurement position M for the light source group, for example, when all the light sources (five light sources in FIG. 7) constituting the light source group are turned on, the peak position of the line light emitted from these light sources can be exemplified by setting the measurement position M to . However, the setting of the measurement position M is not limited to this.

In the configuration described above, the movement control section 51 is configured to sequentially move the light receiver 11 to each measurement position M in a predetermined order. That is, when N measurement positions M are provided, the movement control unit 51 moves the light receiver 11 from the first measurement position M to the Nth measurement position M in order. This order may be the order of arrangement along the light source arrangement direction R, in other words, the order in which one measurement position M and the next measurement position M are adjacent to each other, or at least one measurement position along the light source arrangement direction R. The order in which one is skipped, in other words, the order in which one measurement position M and the next measurement position M are not adjacent to each other may be used.

The light source control unit 52 turns on or off the light source.
The light source control unit 52 controls a light source group (hereinafter also referred to as a control target light source group) corresponding to the measurement position M where the light receiver 11 moved by the movement control unit 51 is located. It tries to turn on all the light sources that make up the light source group by supplying electric power. In this embodiment, the light source control unit 52 is configured to turn off all the light sources that constitute a light source group other than the light source group to be controlled.

The abnormality determination unit 53 compares the detection value detected by the photodetector 11 with a predetermined reference value to determine whether or not there is an abnormal light source. The term "abnormal light source" as used here refers to a light source that emits light differently than it normally does. It is a concept that includes dark light sources and the like.

The abnormality determination unit 53 determines whether or not an abnormal light source is included in the control target light source group while the light source control unit 52 is lighting the control target light source group.

More specifically, the abnormality determination unit 53 acquires the detection value detected by the light receiver 11 by turning on the light source group to be controlled, and here, the reference value storage unit set in the predetermined area of the memory. A reference value stored in advance in 54 is acquired and these values are compared. Note that the reference value storage unit 54 of the present embodiment stores in advance a plurality of reference values corresponding to each of the plurality of light source groups.

Then, when the difference or ratio between the detected value and the reference value exceeds the threshold, the abnormality determination unit 53 determines that an abnormal light source is included in the light source group to be controlled. is below the threshold, it is determined that the light source group to be controlled consists of only normal light sources.

The abnormality determination unit 53 of the present embodiment acquires the irradiance detected by the light receiver 11 as the detection value described above. However, the detected value does not necessarily have to be the irradiance, and may be a measurable light output value such as illuminance, luminous flux, or radiant flux.

Further, the reference value used for the control target light source group is the detection value (here, irradiance) detected by the light receiver 11 when the control target light source group is turned on normally. However, the reference value may not be the normal irradiance itself, but may be a value based on the normal irradiance, such as a value multiplied by a predetermined coefficient. As the reference value, a measurable light output value such as the illuminance, luminous flux, or radiant flux of the light emitted from the light source group to be controlled may be used in the same manner as the detection value described above.

Here, the detection value detected by the light receiver when the light source group to be controlled is turned on in a normal state is a desired value determined by the specifications of the light irradiator X. The initial value detected by the light receiver 11 when the light source group to be controlled is turned on at times, etc., and the value required to ensure the performance of the light irradiator X that can change over time. included.

As shown in FIG. 6, the information processing device 50 outputs a notification signal indicating that an abnormal light source is included in the light source group to be controlled by the abnormality determination unit 53. A function as the notification unit 55 may be further provided.

Next, the operation of the information processing device 50 described above will be described with reference to the flowchart of FIG.

First, when the management unit 100 performs the management operation of the light irradiator X, the movement control unit 51 starts moving the light receiver 11 to the measurement position M in a predetermined order (S1). Note that at the start of the management operation, all light sources are off in this embodiment.

In S1, when the movement control unit 51 moves the light receiver 11 to the initial measurement position M, the light source group corresponding to this measurement position M becomes the control target light source group, and the light source control unit 52 constitutes the control target light source group. The light source is turned on (S2).

The light receiver 11 stopped at the measurement position M detects the light emitted from the light source group to be controlled, and the detected value is output from the light receiver 11 to the abnormality determination unit 53 .

Next, the abnormality determination unit 53 compares the detected value output from the photodetector 11 with the reference value to determine whether or not the control target light source group includes an abnormal light source (S3). The specific determination method is as described above, and the details are omitted.

After the determination by the abnormality determination unit 53 in S3, in this embodiment, regardless of the determination result, it is determined whether the light receiver 11 has been moved to all the measurement positions M (S4). , the process returns to S1. That is, when the determination in S3 is completed, a signal indicating that fact is output from the abnormality determination unit 53 to the movement control unit 51, and the movement control unit 51 receives the signal as a trigger to move the light receiver 11 to the next position. Move to measurement position M.

Here, the movement control unit 51 of this embodiment moves the light receiver 11 at one measurement position M to another measurement position M by skipping the measurement position M adjacent to the one measurement position M. It is configured. That is, the movement control unit 51 is configured to move the light receiver 11 to the measurement position M at least every other one in the operation of S1.

Specifically, the movement control unit 51 is configured to move the light receiver 11 to all the measurement positions M by reciprocally scanning along the light source arrangement direction R. It is sequentially moved to the odd-numbered measurement positions M, and on the return path, it is sequentially moved to the even-numbered measurement positions M in the arrangement order. A waiting time may be provided during which the movement of the photodetector 11 is stopped for a predetermined period of time when returning from the outward path to the return path.

With the configuration of the movement control unit 51 described above, the light source control unit 52 of the present embodiment turns on one light source group, and then turns on the other light source groups by skipping the light source groups adjacent to the one light source group. It is configured to allow

In this way, the photodetector 11 is sequentially moved to each measurement position M (S1), and the operations of S2 and S3 described above are repeated at each measurement position M, and at each measurement position M, the operations of S1 to S3 are repeated. A determination is made as to whether or not the repeated inspection of all sections has been completed (S4). If the inspection for all sections is not completed, the process returns to S1 as described above, and the photodetector 11 is moved to the next measurement position M. If the inspection for all sections is completed, whether or not to perform the individual section inspection is determined. A judgment is made (S5), and if it is to be carried out, an individual section inspection is started in S6 to S8, which will be described later. Note that if it is determined not to perform in S5, the management operation by the information processing apparatus 50 of the present embodiment is terminated.

The individual section inspection is a step of inspecting in more detail the light source group (hereinafter referred to as inspection target light source group) determined by the abnormality determination unit 53 to include an abnormal light source in S3 described above. It is determined whether the light sources constituting the target light source group are abnormal one by one or plurally.

Specifically, first, the movement control unit 51 causes the abnormality determination unit 53 to move the light receiver 11 again to the measurement position M corresponding to the light source group to be inspected in S3 (S6).

Next, the light source control unit 52 turns on at least some of the predetermined number of light sources that constitute the group of light sources to be inspected (S7). In this embodiment, the light source control unit 52 is configured to turn on only a part of the predetermined number of light sources that make up the group of light sources to be inspected. A mode of lighting one by one, and a mode of lighting a plurality of them can be mentioned.

Then, in S7, in a state where some of the light sources that constitute the light source group to be inspected are turned on, the abnormality judgment unit 53 judges whether or not the lighted light sources include an abnormal light source ( S8). In S7, when the light sources constituting the inspection target light source group are turned on one by one, the abnormality determination unit 53 determines whether or not the one lighted light source is abnormal. The specific determination method is as described above, similarly to S3, and the details are omitted.

After that, it is determined whether or not the individual inspection of all the light sources constituting the inspection target light source group has been completed (S9), and if the individual inspection has not been completed, the process returns to S7. In this manner, S7 and S8 are repeated until the individual section inspection of all the light sources constituting the light source group determined to include an abnormal light source is completed.

In the present embodiment, when the abnormality determination unit 53 determines that an abnormal light source is included in the light sources turned on in S8, the notification unit 55 is configured to notify the fact. . As a notification method, for example, characters or symbols on a display may be used for notification, or sound, vibration, light, or the like may be emitted for notification.

Then, when it is determined in S9 that the individual inspection of all the light sources constituting the inspection target light source group has been completed, it is determined whether or not there remains another inspection target light source group that has not been individually inspected. (S10).

If another light source group to be inspected remains in S10, the process returns to S6, the individual inspections of S6 to S8 are started for the light source group to be inspected, and no other light source group to be inspected remains in S10. If so, the management operation by the information processing apparatus 50 of the present embodiment ends.

<Effect>
According to the management unit 100 configured as described above, first, the control target light source group is turned on, and it is determined whether or not the control target light source group includes an abnormal light source. When it is determined that the light source group to be inspected is partially turned on, an abnormal light source can be found more efficiently than by turning on the light sources one by one.

In addition, since the abnormality judgment unit 53 judges whether or not an abnormal light source is included in a part of the light sources constituting the light source group to be inspected in the individual inspection, an abnormal light source is automatically detected from among a large number of light sources. can be specifically identified.

By the way, when a plurality of light source groups are turned on one after another in the order in which they are arranged, while one light source group is being turned on, the light source groups adjacent to that one light source group may be thermally affected. This thermal effect can cause variations in irradiance.
On the other hand, the movement control unit 51 of the present embodiment moves the light receiver 11 at one measurement position M to another measurement position M by skipping the measurement position M adjacent to the one measurement position M. Therefore, variations in irradiance can be suppressed when the light source group is turned on, and the presence or absence of an abnormality can be determined more accurately.

Furthermore, since the reference value used for the light source group to be controlled uses the detection value detected by the photodetector 11 when the light source group to be controlled is normally turned on, the light source that cannot be turned on is used. It can be found that not only is the

<Other embodiments>
In addition, this invention is not restricted to the said embodiment.

For example, in the above-described embodiment, after the judgment by the abnormality judging section 53 is completed in the inspection for all sections, the light receiver 11 is moved to the next measurement position M regardless of the judgment result. , when the abnormality determination unit 53 determines that an abnormal light source is included in the light source group to be controlled in S'3 of the full-section inspection, before moving the light receiver 11 to the next measurement position M Then, individual inspection may be performed on the light source group to be controlled (S'4, S'5).
That is, when the abnormality determination unit 53 determines that an abnormal light source is included in the control target light source group, the light source control unit 52 removes at least a part of the predetermined number of light sources constituting the control target light source group. It may be configured to be lit.

In the above-described embodiment, the light source control unit 52 turns off the light sources constituting the light source group different from the control target light source group in the full section inspection. Therefore, all the light sources constituting the light irradiator X may be turned on regardless of the position of the light receiver 11 .
Similarly, in the individual inspection, the light source control unit 52 may turn on all of the predetermined number of light sources that constitute the light source to be inspected.

In the above embodiment, the number of light sources constituting the light source group is the same in each light source group. .
In this case, one value can be used as the reference value, so that data processing can be simplified and memory capacity can be reduced.

More specifically, as shown in FIG. 10, the light irradiator X emits light from the light source positioned at the end in the arrangement direction R to the outside of the light source in order to improve the light extraction efficiency, for example. Some have a reflecting mirror X1 that reflects the reflected light toward the light exit port. In addition, in order to increase the light output of the end portion, there are cases where the arrangement density of the light sources is increased or a light source with a higher output is arranged.
In such a case, if the number of light sources constituting the light source group is the same, the irradiance of the light emitted from the light source group at the ends in the arrangement direction is the same as that of the light emitted from the light source group at the center in the arrangement direction. It becomes larger than the irradiance, and the detection value detected by the photodetector 11 is saturated.
Therefore, in order to prevent the saturation of the detection value, the number of light sources constituting the light source group at the end in the arrangement direction R is increased so that the irradiance of the light emitted from the light source group is equal to each other, as shown in FIG. , the number of light sources may be smaller than the number of light sources constituting the light source group in the central portion in the arrangement direction R.

On the other hand, in cases other than the above, there is a risk that the irradiance at both ends of the light emitted from the light exit port will be low (that is, the light intensity will be low).
Therefore, in order to improve the uniformity of light and prevent saturation of detection values in the light source group in the center in the arrangement direction, the number of light sources constituting the light source group in the end in the arrangement direction R may be larger than the number of light sources that constitute the light source group in the central portion.

In the above-described embodiment, the reference value is the irradiance of the light emitted from the control target light source group in a normal state. It may be determined based on a detection value detected by the light receiver 11 when a light source group different from the group is turned on.
More specifically, the reference value used for the light source group to be controlled is, for example, the detection value detected by the light receiver 11 when the light source group adjacent to the light source group to be controlled is turned on during the management operation. Also good.
As another aspect, the average value of the detection values detected by the photodetector 11 when all the light sources constituting the light irradiator X are turned on is used as a reference for the light source group to be controlled. It can be used as a value.

Although the movement control section 51 moves the light receiver 11 in the above embodiment, it may move the light irradiator X with respect to the light receiver 11 .

In the above-described embodiment, after the movement control unit 51 moves the light receiver 11 to the measurement position M, the light source control unit 52 turns on the light source group to be controlled or the light source group to be inspected. The order is not limited to this, and the movement control unit 51 may move the light receiver 11 to the measurement position M from a state in which the light source control unit 52 turns on the light source group to be controlled or the light source group to be inspected.

Furthermore, in the above-described embodiment, the individual section inspection is performed once after the full section inspection. By doing so, the location of the abnormal light source may be gradually narrowed down.
That is, for a light source group to be inspected that is determined to include an abnormal light source in the full section inspection, a predetermined number (for example, 100) of the light sources are turned on in the first individual section inspection to determine if there is an abnormality. Narrow down the light source. Then, for the plurality of light sources narrowed down as locations containing an abnormal light source, the number of light sources smaller than the predetermined number (for example, 10) is turned on in the next individual section inspection. Also good.

The light irradiator X is not necessarily limited to one that emits UV light, and may be one that emits infrared light or visible light, for example.

Furthermore, the light irradiator X does not necessarily have a plurality of light sources arranged linearly, and may be arranged in a ring (the arrangement direction of the light sources is a ring).

As the linear motion device 20, a plurality of linear motion mechanisms 21 are arranged along the movement direction of the light receiving unit 10, and each linear motion mechanism 21 movably supports a separate light receiving unit 10. It may be something to do.
By arranging a plurality of linear motion mechanisms 21 side by side in this manner, a longer inspection range can be set than when a single linear motion mechanism 21 is used.

In addition, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 100... Management unit X... Light irradiation device 11... Light receiver 50... Information processing apparatus 51... Movement control part 52... Light source control part 53... Abnormality judgment part

Claims (10)

A management unit used in a light irradiator in which a plurality of light sources are arranged along a predetermined arrangement direction,
a light receiver that receives light from the light source;
a movement control unit that moves one of the light irradiator and the light receiver relative to the other along the arrangement direction;
a light source control unit that turns on or off the light source;
an abnormality determination unit that compares the detection value detected by the light receiver with a predetermined reference value to determine whether or not there is an abnormal light source;
The movement control unit
sequentially moving the light irradiator or the light receiver to predetermined measurement positions for each of a plurality of light source groups consisting of a predetermined number of the plurality of light sources;
The light source control unit
lighting the light source group corresponding to the measurement position where at least the light irradiator or the light receiver is located;
The abnormality determination unit
Determining whether the lighted light source group includes an abnormal light source,
A management unit, wherein, when the abnormality determination section determines that the light source group includes an abnormal light source, the light source control section turns on at least a part of a predetermined number of light sources constituting the light source group. In a state in which the light source control unit turns on at least a part of a predetermined number of light sources that constitute the light source group, the abnormality determination unit determines whether or not the light sources include an abnormal light source; Management unit according to claim 1. 2. The management unit according to claim 1, wherein said light source control unit turns on said one light source group, and then turns on another said light source group that has skipped said light source group adjacent to said one light source group. 2. Management unit according to claim 1, wherein the respective reference values used for the plurality of light source groups are equal to each other. 2. The management unit according to claim 1, wherein the number of light sources forming the light source group at the ends in the arrangement direction is smaller than the number of light sources forming the light source group at the center in the arrangement direction. 2. The management unit according to claim 1, wherein the number of light sources forming the light source group at the ends in the arrangement direction is greater than the number of light sources forming the light source group at the center in the arrangement direction. 2. The method according to claim 1, wherein the reference value used for one of the light source groups is determined based on a detection value detected by the light receiver when the one light source group is normally lit. management unit. The reference value used for one of the light source groups is determined based on a detection value detected by the light receiver when the light source group other than the one light source group is turned on. A management unit according to claim 1. A management program used for a light irradiator in which a plurality of light sources are arranged along a predetermined arrangement direction,
a movement control unit that moves one of the light irradiator and the light receiver that receives light from the light source with respect to the other along the arrangement direction;
a light source control unit that turns on or off the light source;
causing the computer to exhibit a function as an abnormality determination unit that determines whether or not there is an abnormal light source by comparing the detection value detected by the light receiver with a predetermined reference value;
The movement control unit
sequentially moving the light irradiator or the light receiver to predetermined measurement positions for each of a plurality of light source groups consisting of a predetermined number of the plurality of light sources;
The light source control unit
lighting the light source group corresponding to the measurement position where at least the light irradiator or the light receiver is located;
The abnormality determination unit
Determining whether the lighted light source group includes an abnormal light source,
When the abnormality determination unit determines that the light source group includes an abnormal light source, the light source control unit is configured to turn on at least a part of a predetermined number of light sources constituting the light source group. management program. A management method used for a light irradiator in which a plurality of light sources are arranged along a predetermined arrangement direction,
a movement control step of moving one of the light irradiator and the light receiver that receives light from the light source relative to the other along the arrangement direction;
a light source control step of turning on or off the light source;
an abnormality determination step of comparing the detection value detected by the light receiver with a predetermined reference value to determine whether or not there is an abnormal light source;
In the movement control step,
sequentially moving the light irradiator or the light receiver to predetermined measurement positions for each of a plurality of light source groups consisting of a predetermined number of the plurality of light sources;
In the light source control step,
lighting the light source group corresponding to the measurement position where at least the light irradiator or the light receiver is located;
In the abnormality determination step,
Determining whether the lighted light source group includes an abnormal light source,
A management method for lighting at least a part of a predetermined number of light sources constituting a light source group when it is determined that an abnormal light source is included.

Images