WO2017082540A1 - Optical scanner - Google Patents

Abstract

An optical scanner is disclosed. The optical scanner of the present invention comprises: a housing; a rotating body which rotates inside the housing; a first reflective surface which forms the outer surface of the rotating body; a second reflective surface which forms the outer surface of the rotating body; a shade which is located between the first reflective surface and the second reflective surface and is extended from the rotating body toward the inner surface of the housing; a light emitting part which supplies light to the first reflective surface; and a light receiving part which detects light reflected from the second reflective surface.

Description

Optical scanner

The present invention relates to an optical scanner capable of sensing a wide range of areas.

Electronic devices have been developed for the detection or monitoring of specificities in specific areas. As societies become more complex and diversified, the demand for these devices is increasing to make up for the lack of national security or to prevent the leakage of corporate or personal confidential information. In addition, the necessity of accurately recognizing the personnel entering and leaving the area for the purpose of securing safety and the like is increasing.

Conventional devices that perform these functions have room to avoid surveillance networks because their sensing or surveillance areas are very limited or narrow. Accordingly, there is a demand for the development of electronic devices capable of detecting or monitoring a wide range of areas. In general, electronic devices for detecting the distance of an object using laser light and the like are called optical scanners or laser scanners. In the present invention, the light source of the optical scanner is described as being a laser, but is not limited to the laser.

The optical scanner may include, for example, a laser range finder (LRF), a time of flight (TOF), a light detection and ranging (LIDAR), and the like. Conventional optical scanning devices are suitable for measuring the angular range in the horizontal direction, and calculate distance information of an object present in the detection space for each angular direction. The laser light periodically scans the scanning area by the optical deflector. The laser light returned by the detection object is detected by the sensor and evaluated by the controller. The angular position of the detection object is determined based on the angular position information of the optical deflector. Distance information of the detection object is determined based on the TOF in the controller.

Conventional optical scanning devices use two basic principles to determine the TOF. First, there is a method of modulating the continuous light and evaluating the phase difference between the transmitted light and the received light. Second, there is a method in which the optical output emits intermittent pulses of relatively strong output and calculates the distance by measuring the TOF from the transmission light to the reception light. When the intrusion of the detection object is recognized by setting a protected area in the detection area, the optical scanning device outputs a safety signal. In the case of static objects existing in the safety zone, intrusion into the safety zone is allowed through pre-teaching.

Japanese Patent Laid-Open No. 2001-51225 and Japanese Patent Laid-Open No. 2014-48313 disclose the contents of a rotating face mirror that can be associated with optical scanning.

It is an object of the present invention to solve the above and other problems. Another object may be to provide an optical scanner capable of scanning a wide range of areas.

Another object may be to provide an optical scanner capable of sensing or monitoring a 2D or 3D area.

Another object may be to provide an optical scanner capable of minimizing optical interference.

Still another object may be to provide an optical scanner that can improve the efficiency of sensing or monitoring while minimizing the size of the device.

Still another object may be to provide an optical scanner capable of efficiently operating a path of reference light.

Still another object may be to provide an optical scanner that can determine whether an abnormality of the device through the online.

According to an aspect of the present invention to achieve the above or another object, a housing; A rotating body rotating in the housing and including a plurality of reflective surfaces; A light shielding plate extending from the rotating body toward an inner surface of the housing and separating each of the plurality of reflective surfaces into a first reflective surface and a second reflective surface; A light emitting unit providing light to the first reflective surface; And, it provides an optical scanner including a light receiving unit for detecting the light reflected from the second reflecting surface.

The shield may further include a shield extending from the inner surface of the housing toward the light blocking plate, and the light blocking plate and the shield part may overlap at least a part of the shielding part.

The light blocking plate may have a step formed at one end thereof, and the shield may have a step corresponding to the step.

The shield may have a groove formed in at least a portion thereof, and the light blocking plate may include a stepped portion inserted into the shield.

The first reflecting surface may be located above the rotating body, and the second reflecting surface may be located below the rotating body.

The left and right widths of the first reflective surface may be different from the left and right widths of the second reflective surface.

The plurality of first reflecting surfaces are provided, the plurality of first reflecting surfaces have different inclinations toward the center of rotation of the rotating body, and the plurality of second reflecting surfaces is provided, and the plurality of second vanes The slope may have different inclination toward the center of rotation of the rotating body.

The first reflecting surface may form an upper portion of the rotating body, and the second reflecting surface may form a lower portion of the rotating body, and an area of the second reflecting surface may be wider than that of the first reflecting surface.

A first reference reflector protruding from the first reflecting surface; And a second reference reflecting surface protruding from the second reflecting surface.

The light blocking plate may further include a slit formed between the first reference reflection surface and the second reference reflection surface.

The first reference reflective surface is inclined to face the light emitting part and the second reference reflective surface, and the second reference reflective surface is inclined to face the light receiving portion and the first reference reflective surface. Can be.

The first reference reflective surface is positioned adjacent to at least one edge of the first reflective surface, and the second reference reflective surface is lower than the first reference reflective surface so as to correspond to the first reference reflective surface. It can be located at

The first reflecting surface and the second reflecting surface may sequentially form side surfaces of the rotating body so that a flat cross section of the rotating body may be polygonal.

First and second reference reflecting surfaces positioned on an outer surface of the housing, wherein the first reference reflecting surfaces are positioned at a height of the first reflecting surface, and the second reference reflecting surfaces are the second Located at the height of the reflective surface, the housing, the first hole formed between the first reflective surface and the first reference reflective surface, and the second formed between the second reflective surface and the second reference reflective surface 2 holes can be provided.

And a reflector disposed between the light receiver and the second reflective surface, wherein the reflector may be positioned on an optical path between the light receiver and the second reflective surface.

A reflector disposed between the light receiver and the light emitter and the rotating body to reflect light from the second reflecting surface to the light receiver, wherein the reflector includes a hole corresponding to the light emitter. Can be.

The light emitting portion and the light receiving portion are located outside the housing, and the housing includes a first opening formed between the light emitting portion and the first reflective surface, and between the light receiving portion and the second reflective surface. The formed second opening may be provided.

And a reflector disposed between the light receiver and the second reflector, wherein the second opening is formed between the second reflector and the reflector, and the light emitter and the light receiver are spaced apart from each other. .

The light emitting unit and the light receiving unit may be located on one PCB substrate.

The effects of the optical scanner according to the present invention will be described below.

According to at least one of the embodiments of the present invention, a wide area may be scanned.

According to at least one of the embodiments of the present invention, the 2D or 3D area may be detected or monitored.

According to at least one of the embodiments of the present invention, it is possible to minimize the optical interference.

According to at least one of the embodiments of the present invention, it is possible to improve the sensing or monitoring efficiency, but to minimize the size of the device.

According to at least one of the embodiments of the present invention, it is possible to efficiently operate the path of the reference light.

According to at least one of the embodiments of the present invention, it is possible to determine whether the device is abnormal through online.

Further scope of the applicability of the present invention will become apparent from the following detailed description. However, various changes and modifications within the spirit and scope of the present invention can be clearly understood by those skilled in the art, and therefore, specific embodiments, such as the detailed description and the preferred embodiment of the present invention, should be understood as given by way of example only.

1 to 9 illustrate examples of scanning of an optical scanner according to an embodiment of the present invention.

10 to 20 illustrate examples of optical interference blocking of an optical scanner according to an embodiment of the present invention.

21 to 30 illustrate examples of a reference light path according to an embodiment of the present invention.

31 to 33 are views illustrating an example of an optical scanner according to an embodiment of the present invention.

34 is a block diagram of an optical scanner according to an embodiment of the present invention, and FIG. 35 is a diagram illustrating an example of abnormality detection of the optical scanner according to an embodiment of the present invention.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, and the same or similar components are denoted by the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. The suffixes "module" and "unit" for components used in the following description are given or used in consideration of ease of specification, and do not have distinct meanings or roles from each other. In addition, in describing the embodiments disclosed herein, when it is determined that the detailed description of the related known technology may obscure the gist of the embodiments disclosed herein, the detailed description thereof will be omitted. In addition, the accompanying drawings are intended to facilitate understanding of the embodiments disclosed herein, but are not limited to the technical spirit disclosed herein by the accompanying drawings, all changes included in the spirit and scope of the present invention. It should be understood to include equivalents and substitutes.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "comprises" or "having" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

1 to 8 illustrate examples of scanning of an optical scanner according to an embodiment of the present invention.

Referring to FIG. 1, the optical scanner 100 may include a light emitting device 110 and a reflective surface 120. The light emitting device 110 may provide light. The light emitting device 110 may provide light in which straightness is maintained. For example, the light emitting device 110 may be a laser diode LD. The reflective surface 120 may reflect light. The reflective surface 120 may be a mirror or a surface coated with a material having high reflectance. The reflective surface 120 may rotate. When the reflective surface 120 rotates, the path of light provided by the light emitting device 110 may change. For example, the light path may change from L1 to L2 when the reflective surface 120 rotates. The path of the light may change from L1 to L5 according to the rotation of the reflective surface 120. Rotation of the reflective surface 120 may be on the x and y axis planes.

Referring to FIG. 2, the optical scanner 100 may include a plurality of reflective surfaces 120. The plurality of reflective surfaces 120 may sequentially change the path of light provided by the light emitting device 110. The plurality of reflective surfaces 120 may be provided on the outer surface of the rotating body 120R.

The rotating body 120R may have a quadrangular shape, and the reflective surfaces 120a, 120b, 120c, and 120d may be provided on an outer surface of the rotating body 120R. That is, it means that the reflective surfaces 120a, 120b, 120c, and 120d may form a square side or a square pillar surface.

For another example, the rotor 120R may be triangular, and the reflective surfaces 120a, 120b, and 120c may be provided on the outer surface of the rotor 120R. That is, the reflective surfaces 120a, 120b, and 120c may form sides of triangles or surfaces of triangle columns.

As another example, the rotating body 120R may be pentagonal, and the reflective surfaces 120a, 120b, 120c, 120d, and 120e may be provided on an outer surface of the rotating body 120R. That is, the reflective surfaces 120a, 120b, 120c, 120d, and 120e may form pentagonal sides or pentagonal pillar surfaces.

As the number of reflective surfaces 120 increases, the scanning term of the area that the optical scanner 100 can detect or monitor may be reduced. In other words, it means that the optical scanner 100 can scan the scan area SA at a high speed. The optical scanner 100 may have more reflective surfaces 120.

Referring to FIG. 3, the optical scanner 100 may include a first reflecting surface 1201, a second reflecting surface 1202, a light emitting device 110, and a light receiving sensor 130. The light emitting device 110 may provide light to the first reflective surface 1201. Light provided from the light emitting device 110 may be reflected by the first reflecting surface 1201 to the outside of the optical scanner 100. At this time, when the first reflective surface 1201 rotates, the path of light provided from the light emitting device 110 may change. For example, the path of light can change from L1 to L4.

Light flowing into the optical scanner 100 from the outside of the optical scanner 100 may be provided to the second reflective surface 1202. Light provided from the outside of the optical scanner 100 may be reflected by the second reflecting surface 1202 to face the light receiving sensor 130. In this case, the light detected by the light receiving sensor 130 may have information of the scan area SA. In other words, the information of the scan area SA may be information about whether an object exists on the scan area SA.

Referring to FIG. 4, the reflective surface 120 may have a predetermined angle. The predetermined angle may vary with respect to the z axis. For example, when the reflective surface 120 has an angle of θ1, the path of light may be L1. When the reflective surface 120 has an angle of θ2, the path of light may be L2, and when the reflective surface 120 has an angle of θ3, the path of light may be L3. That is, the path of the light may change according to the inclination of the reflective surface 120.

Referring to FIG. 5, the reflective surface 120 may include a first angle surface 120a and a second angle surface 120b. The first angle surface 120a may be formed on one surface of the rotating body 120R, and the second angle surface 120b may be formed on the other surface of the rotating body 120R. As described with reference to FIG. 6, the path of the light reflected on the first angle plane 120a and the path of the light reflected on the second angle plane 120b may be different from each other. That is, when the rotating body 120R rotates, it means that the path of light reflected by the reflecting surface 120 may be changed. In this case, the path of the light reflected by the reflective surface 120 may be a change on the z axis.

Referring to FIG. 6, as the first angle plane 120a and the second angle plane 120b rotate, the path of the light provided by the light emitting device 110 and reflected on the reflective surface 120 may be changed. Accordingly, the scan area SA may be formed outside the optical scanner 100. The scan area SA may be formed on the z axis. For example, the path of light reflected by the first angle plane 120a may be L1, and the path of light reflected by the second angle plane 120b may be L2. The paths of L1 and L2 may lie on the z axis.

2 to 7, the reflective surface 120 may include a plurality of angular surfaces 120a, 120b, 120c, and 120d. The plurality of angle planes 120a, 120b, 120c, and 120d may be four angle planes. The four angle planes may be, for example, 0 degrees, 2 degrees, 4 degrees, and 6 degrees with respect to the z axis. Accordingly, the optical scanner 100 may form the scan area SA in a plurality of different planes. That is, the optical scanner 100 may detect or monitor the scan area SA including the first scan distance SL1 and the second scan distance SL2. In this case, the scan area SA may include, for example, a first plane D1, a second plane D2, a third plane D3, and a fourth plane D4. Here, when the angular plane 120a is 0 degrees, the first plane D1 is the second plane D2 when the angular plane 120b is 2 degrees, and the third plane D3 is the angular plane 120c. At 4 degrees, the fourth plane D4 may be formed when the angle plane 120d is 6 degrees. The scan area SA may be radial and / or fan-shaped. For example, it means that the inside of the area specified by the first and second scan distances SL1 and SL2 may be the scan area SA.

Referring to FIG. 8, light provided from the light emitting device 110 may be reflected by the first reflective surface 1201 to face an object. Light directed to the object may be reflected from the object and directed to the second reflective surface 1202. Light reflected from the object toward the second reflective surface 1202 may be reflected by the second reflective surface 1202 toward the light receiving sensor 130, and the light receiving sensor 130 may detect the light. Accordingly, the optical scanner 100 may detect information about the presence or absence of an object or monitor whether there is an object in the scan area SA. In this case, as described above, the scan area SA may be formed in 2D or 3D. That is, the accuracy, range, etc. of the optical scanner 100 that detects or monitors the scan area SA may be improved.

9 to 17 illustrate examples of optical interference blocking of an optical scanner according to an embodiment of the present invention.

Referring to FIG. 9, the light scanner 100 may include a light blocking plate 140. The light blocking plate 140 may be positioned between the first reflective surface 1201 and the second reflective surface 1202. The light blocking plate 140 may block light movement between the first reflective surface 1201 and the second reflective surface 1202 between the first reflective surface 1201 and the second reflective surface 1202. In other words, the light blocking plate 140 has the light L1 provided to the first reflecting surface 1021 reflected from the first reflecting surface 1201 and directed toward the second reflecting surface 1202 or the second reflecting surface 1202. Light L2 provided to the second reflection surface 1202 may be prevented from being directed toward the first reflection surface 1201. The light blocking plate 100 may be integrally formed with the first and second reflective surfaces 1201 and 1202.

The intensity of the light L1 provided to the first reflective surface 1201 is significantly stronger than that of the light L2 provided to the second reflective surface 1202. For example, the intensity of light provided from the light emitting device 110 described with reference to FIG. 9 may be tens of thousands or hundreds of times stronger than the sensitivity of the light receiving sensor 130. Accordingly, the light provided from the light emitting device 110 may cause scattered light while reflecting from the first reflective surface 1201. As a result, the scattered light may cause interference in the second reflecting surface 1202 or the light receiving element 130. This interference is an important issue that can lead to malfunction of the optical scanner 100.

The light blocking plate 140 may optically isolate the first reflecting surface 1201 from the second reflecting surface 1202 or optically isolate the second reflecting surface 1202 from the first reflecting surface 1201. ) Accuracy can be improved.

Referring to FIG. 10, the optical scanner 100 may include a first reflecting surface 1201, a second reflecting surface 1202, a light blocking plate 140, and an inner housing 160. The light blocking plate 140 may partition the first reflective surface 1201 and the second reflective surface 1202. This means that the light blocking plate 140 may optically isolate the first reflective surface 1201 and the second reflective surface 1202 from each other, as described above. The light blocking plate 140 may extend in an outward direction of the first reflective surface 1201 or the second reflective surface 1202. The light blocking plate 140 may include a first stepped part 1401 and a second stepped part 1402. The second stepped part 1402 may further extend outwardly than the first stepped part 1401. In other words, a step may be formed at one end of the light blocking plate 140 by the first step part 1401 and the second step part 1402.

The first and second stepped portions 1401 and 1402 may be integrally formed. The first and second stepped portions 1401 and 1402 may be integrally formed with the rotating body 120R. That is, the light blocking plate 140 may protrude in the vertical direction of the rotating body 120R, and may have a form in which a step is formed at the protruding end.

The rotating body 120R may include a first reflecting surface 1201 and a second reflecting surface 1202. The rotating body 120R may be located inside the inner housing 160. The inner housing 160 may have a cylindrical shape as a whole. That is, it means that the rotor 120R can rotate inside the inner housing 160. In this case, the first and second reflective surfaces 1201 and 1202 may face the inner surfaces of the inner housing 160. The inner housing 160 may include an optical shield 150. The light shield 150 may have a shape corresponding to the first and second stepped portions 1401 and 1402 of the light blocking plate 140. The optical shield 150 may include a first shield part 1501 and a second shield part 1502. The first shield part 1501 may be positioned adjacent to the first stepped part 1401. The second shield portion 1502 may be positioned adjacent to the second stepped portion 1402. The first shield part 1501 may form a step with the second shield part 1502. Light may be blocked by the first and second stepped portions 1401 and 1402 and the first and second shield portions 1501 and 1502. In other words, the light from the first reflecting surface 1201 to the second reflecting surface 1202 or from the second reflecting surface 1202 to the first reflecting surface 1201 is refracted several times to the optical path LP formed. Can be blocked. That is, the first reflecting surface 1201 and the second reflecting surface 1202 may be optically isolated from each other.

The light blocking plate 140 and the shield 150 may optically isolate the first reflecting surface 1201 from the second reflecting surface 1202 or optically isolate the second reflecting surface 1202 from the first reflecting surface 1201. The isolation of the optical scanner 100 can be improved. Such a configuration may be useful in the order of assembly in which the inner housing 160 is mounted around the rotating body 120R after the rotating body 120R is first seated.

Referring to FIG. 11, the first stepped part 1401 may further extend outwardly than the second stepped part 1402. In other words, a step may be formed at one end of the light blocking plate 140 by the first step part 1401 and the second step part 1402.

The first shield part 1501 may be positioned adjacent to the first stepped part 1401. The second shield portion 1502 may be positioned adjacent to the second stepped portion 1402. The first shield part 1501 may form a step with the second shield part 1502.

Light from the first reflecting surface 1201 to the second reflecting surface 1202 or from the second reflecting surface 1202 to the first reflecting surface 1201 may be blocked by the optical path LP formed by refraction several times. Can be. That is, the first reflecting surface 1201 and the second reflecting surface 1202 may be optically isolated from each other. Such a configuration may be useful in the order of assembly in which the inner housing 160 is first seated and then the rotating body 120R is mounted in the inner housing 160.

Referring to FIG. 12, the light blocking plate 140 may include a first stepped part 1401, a second stepped part 1402, and a third stepped part 1403. The second stepped part 1402 may further extend outwardly than the first stepped part 1401 and the third stepped part 1403. In other words, a plurality of steps may be formed at one end of the light blocking plate 140 by the first step part 1401, the second step part 1402, and the third step part 1403.

The optical shield 150 may include a first shield part 1501, a second shield part 1502, and a third shield part 1503. The first shield part 1501 may be positioned adjacent to the first stepped part 1401. The second shield portion 1502 may be positioned adjacent to the second stepped portion 1402. The third shield portion 1503 may be positioned adjacent to the third stepped portion 1403. The first shield portion 1501, the second shield portion 1502, and the third shield portion 1503 may form grooves as a whole.

Light from the first reflecting surface 1201 to the second reflecting surface 1202 or from the second reflecting surface 1202 to the first reflecting surface 1201 may be blocked by the optical path LP formed by refraction several times. Can be. That is, the first reflecting surface 1201 and the second reflecting surface 1202 may be optically isolated from each other. Such a configuration may be more advantageous than the embodiments described above in optical isolation of the first reflective surface 1201 and the second reflective surface 1202.

Referring to FIG. 13, the light blocking plate 140 may be positioned around the rotor 120R. The light blocking plate 140 may be positioned around the reflective surface 120. The light blocking plate 140 may extend from the reflective surface 120 to protrude in the x-axis or y-axis direction. The outside of the light blocking plate 140 may be formed at least adjacent to the reflective surface 120 or at a predetermined distance D. That is, the light blocking plate 140 may mean that the light reflected from the reflective surface 120 may be covered. The reflective surface 120 may be a first angle plane 120a, a second angle plane 120b, a third angle plane 120c, and a fourth angle plane 120d having different angles with respect to the z axis. .

The light shielding plate 140 is between the first and second angle planes 120a and 120b, between the second and third angle planes 120b and 120c, and between the third and fourth angle planes 120c and 120d, and the fourth and first angles. It may not be present between faces 120d and 120a. That is, it means that it may be a form protruding in a semi-circular shape on each reflective surface 120.

Referring to FIG. 14, the light blocking plate 140 may extend from the reflective surface 120 to protrude in the x-axis or y-axis direction. The outside of the light blocking plate 140 may be formed at a predetermined distance D from the reflective surface 120. That is, the light blocking plate 140 may mean that the light reflected from the reflective surface 120 may be covered. For example, a distance between one end of the light blocking plate 140 from the center of the fourth angled surface 120d is D2, and one side of the fourth angled surface 120d, that is, the fourth angled surface 120d and the third angled surface. When the distance between one end of the light blocking plate 140 from the side where 120c meets is D1, D2 may be greater than D1.

Accordingly, the blocking of light from the first reflective surface 1201 to the second reflective surface 1202 or from the second reflective surface 1202 to the first reflective surface 1201 may be further improved.

Referring to FIG. 15, the optical scanner 100 includes a light emitting element 110, a first lens 170, a rotating body 120R, first and second reflecting surfaces 1201 and 1202, a light blocking plate 140, and a reflecting plate. 172, a second lens 171, and a light receiving sensor 130.

Light provided from the light emitting device 110 may be directed to the first reflective surface 1201 through the first lens 170. Light reflected from the first reflecting surface 1201 may go out of the optical scanner 100. Light flowing from the outside of the optical scanner 100 to the inside may be reflected by the second reflecting surface 1202 to the reflecting plate 172. Light reflected from the reflector 172 may be detected by the light receiving sensor 130 through the second lens 171. In this case, the light blocking plate 140 may prevent mutual interference of light reflected from the first reflective surface 1201 and light reflected from the second reflective surface 1202. Accordingly, malfunction of the optical scanner 100 can be prevented, and the accuracy of the optical scanner 100 can be improved.

The size of the second lens 171 may be larger than the size of the first lens 170. This may mean that one diameter of the second lens 171 may be larger than one diameter of the first lens 170. The outer edge of the second lens 171 may be processed in a straight line as necessary. The correlation between the size of the second lens 171 and the size of the first lens 170 may be formed according to the size of the second reflecting surface 1202 and the first reflecting surface 1201.

16 to 25 illustrate examples of a reference light path according to an embodiment of the present invention.

Referring to FIG. 16, the height H2 of the second reflecting surface 1202 may be higher than the height H1 of the first reflecting surface 1201. The first reflecting surface 1201 reflects the light provided from the light emitting device 110 to the outside of the optical scanner 100, and the second reflecting surface 1202 receives the light flowing from the outside of the optical scanner 100. As reflected by the 130 so as to be sensed, an increase in the effective area of the second reflective surface 1202 is significant for the operation of the optical scanner 100. In this case, the overall height H including the heights H1 and H2 of the first reflective surface 1201 and the second reflective surface 1202 may be limited. There may be a limitation on the size of the optical scanner 100. In addition, the overall height H may occupy a large proportion in miniaturization of the optical scanner 100.

Referring to FIG. 17, the total height H includes the height H1 of the first reflective surface 1201, the height H2 of the second reflective surface 1202, and the height Hw of the light blocking plate 140. can do. Referring to FIG. 18, the total height H includes the height H1 of the first reflective surface 1201, the height H2 of the second reflective surface 1202, and the height Hg of the groove 120h. can do. Since the height Hg of the groove 120h includes the height Hw of the light blocking plate 140, the height Hg of the groove 120h becomes higher than the height Hw of the light blocking plate 140. That is, the overall height H is higher in the configuration of FIG. 18 than the overall height H in the configuration of FIG. 17. This may affect the effective area of the first reflecting surface 1201 or the second reflecting surface 1202 if the overall height H is limited. This may affect the overall size of the optical scanner 100, unless the overall height H is limited. That is, the configuration of FIG. 17 may be advantageous than the configuration of FIG. 18.

Referring to FIG. 19, the optical scanner 100 may include a reference reflector 180. The reference reflective surface 180 may be positioned on the first reflective surface 1201 or the second reflective surface 1202. The reference reflective surface 180 may be provided in plural. The plurality of reference reflecting surfaces may include a first reference reflecting surface 1801 and a second reference reflecting surface 1802. The first reference reflective surface 1801 may be located on the first reflective surface 1201, and the second reference reflective surface 1802 may be located on the second reflective surface 1202.

As the rotor 120R rotates, the first reflecting surface 1201 and the second reflecting surface 1202 may rotate. When the first reflecting surface 1201 and the second reflecting surface 1202 of the rotating body 120R reach a predetermined position, the light provided from the light emitting element 110 is transferred to the first reference reflecting surface 1801 or the second reference panel. Slope 1802 may be reached. The light reaching the first reference reflecting surface 1801 may be reflected to face the second reference reflecting surface 1802, and the light reflected from the second reference reflecting surface 1802 may be reflected by the light receiving sensor (172). 130 may be sensed by the light receiving sensor 130. That is, the reflecting plate 172 means that the reflection plate 172 is positioned on the optical path between the second reference reflecting surface 1802 and the light receiving sensor 130. Such a light path may be used as light that is a reference of the optical scanner 100. Light as a reference means that the optical scanner 100 may be a reference in optical measurement for detecting or monitoring a certain area.

In more detail, the optical scanner 100 should correct the result of the distance measurement for the distance measurement of the scan area SA, and the correction is performed by measuring the reference light. That is, the measurement of the reference light is to compensate or compensate for the drift of the electronic circuit constituting the optical scanner 100 when measuring the distance of the scan area SA.

The drift phenomenon of the electronic circuit may be compensated or compensated by subtracting the distance value by measuring the reference light from the distance value measured by the optical scanner 100 in the scan area SA.

Referring to FIG. 20, the first reference reflecting surface 1801 may be located adjacent to one side of the first reflecting surface 1201. For example, the first reference reflective surface 1801 may be located on one side of the first angled surface 1201a of the first reflective surface 1201. For another example, the first reference reflective surface 1801 is positioned on one surface of the first angled surface 1201a of the first reflective surface 1201, and the position thereof is a first angled surface of the first reflective surface 1201. It may be adjacent to the boundary of the 1201a and the second angular surface 1201b. The first reference reflective surface 1801 may be inclined toward the lower portion of the rotating body 120R. That is, the first reference reflective surface 1801 may protrude in an inverted triangle shape from the first reflective surface 1201. In this case, a surface of the inverted triangular shape facing the lower portion of the rotating body 120R may be the first reference reflective surface 1801.

The second reference reflecting surface 1802 may be located adjacent to one side of the second reflecting surface 1202. For example, the second reference reflecting surface 1802 may be located at one side of the first angular surface 1202a of the second reflecting surface 1202. For another example, the second reference reflecting surface 1802 is positioned on one surface of the first angled surface 1202a of the second reflective surface 1202, and the position thereof is the first angled surface of the second reflective surface 1202. It may be adjacent to the boundary of the 1202a and the second angular surface 1202b. The second reference reflecting surface 1802 may be inclined toward the upper portion of the rotating body 120R. That is, the second reference reflecting surface 1802 may protrude in a triangular shape from the second reflecting surface 1202. In this case, a surface of the triangular shape facing the top of the rotating body 120R may be the second reference reflecting surface 1802.

The light blocking plate 140 may include a slit 140S. The slit 140S may be positioned below the first reference reflective surface 1801 and may be positioned above the second reference reflective surface 1802. That is, the slit 140S may be located between the first reference reflecting surface 1801 and the second reference reflecting surface 1802. The first reference reflecting surface 1801 may face the second reference reflecting surface 1802 through the slit 140S, and the second reference reflecting surface 1802 may refer to the first reference reflecting surface (slit 140S). 1801). In other words, the slit 140S may provide a path of reference light between the first and second reference reflection surfaces 1801 and 1802.

 Accordingly, it is possible to minimize the size of the optical scanner 100, to provide a path of the reference light while reducing the manufacturing cost. That is, the manufacturing cost can be reduced compared to the case in which the unit for generating light as a reference is separately configured from the rotating body 120R. In addition, since the optical path can be configured to be shorter than when the unit for generating light as a reference is configured separately from the rotating body 120R, the measurement accuracy can be expected to be improved.

Referring to FIG. 21, the first reference reflecting surface 1801 may be located in the central area UM of the first reflecting surface 1201. The second reference reflecting surface 1802 may be located in the central area UM of the second reflecting surface 1202. This position may be a position corresponding to the central region of the first lens 170 and the second lens 171. Accordingly, the optical path of the reference light SL may contribute to the efficient use of the lenses 170 and 171. That is, the accuracy of measuring the reference light SL of the optical scanner 100 may be improved.

Referring to FIG. 22, the first reference reflecting surface 1801 may be located in the central area UM of the first reflecting surface 1201. The second reference reflecting surface 1802 may be located in the upper region DU of the second reflecting surface 1202. Such a position may correspond to a center region of the first lens 170 and an upper region of the second lens 171. Accordingly, there is an advantage in that the optical path of the reference light SL can be reduced.

Referring to FIG. 23, the first reference reflective surface 1801 may be located in the lower region UD of the first reflective surface 1201. The second reference reflecting surface 1802 may be located in the upper region DU of the second reflecting surface 1202. This position may correspond to a lower region of the first lens 170 and an upper region of the second lens 171. Accordingly, there is an advantage that the optical path of the reference light SL can be further reduced.

24 and 25, the first reference reflective surface 1801 and the second reference reflective surface 1802 may be located outside the inner housing 160. The first reference reflecting surface 1801 and the second reference reflecting surface 1802 may provide a path of the reference light SL outside the inner housing 160. The inner housing 160 may include a light hole 160h. A plurality of light holes 160h may be provided. Portions 160h1 and 160h4 of the plurality of light holes 160h may be formed on one surface of the inner housing 160, and the remaining portions 160h2 and 160h3 of the plurality of light holes 160 may be formed on the other surface of the inner housing 160. The light holes 160h1 and 160h2 may be disposed on the same straight line as the light emitting device 110. That is, the light hole 160h1 and the light hole 160h2 may be located on the same optical path. In addition, the light hole 160h3 and the light hole 160h4 may be disposed on the same straight line as the reflector 172. That is, the light hole 160h3 and the light hole 160h4 may be located on the same optical path.

Light holes, holes, and openings are terms used for convenience of understanding, and they are not necessarily referred to different configurations because the terms are different. For example, the light hole 160h may mean the interior of the first and second openings 160P1 and 160P2 of FIG. 27.

The first reference reflecting surface 1801 and the second reference reflecting surface 1802 may be positioned adjacent to the plurality of light holes 160h2 and 160h3. The first reference reflective surface 1801 may be located adjacent to the hole 160h2. The first reference reflective surface 1801 may face the hole 160h1 through the hole 160h2. The second reference reflecting surface 1802 may be located adjacent to the hole 160h3. The second reference reflecting surface 1802 may face the hole 160h4 through the hole 160h3.

Light provided from the light emitting device 110 may pass through the first reflective surface 1201 through the hole 160h1. Light passing through the first reflective surface 1201 may face the first reference reflective surface 1801 through the hole 160h2. The light reflected from the first reference reflecting surface 1801 may face the second reference reflecting surface 1802 and be reflected thereon, and may face the reflecting plate 172 through the holes 160h3 and 160h4, and to the light receiving sensor 130. Can be detected. The optical path SL may be temporarily formed according to the rotation of the rotor 120R. That is, the light path SL is at an angle at which the light provided from the light emitting device 110 is not reflected by the first reflecting surface 1801 by the rotation of the rotor 120R and may pass through the first reflecting surface 1801. ) Can be formed.

26 and 27 illustrate an example of an optical scanner according to an embodiment of the present invention.

Referring to FIG. 26, the optical scanner 100 may include an outer housing 200, an inner housing 160, light emitting units 110 and 170, light receiving units 171 and 130, a rotating body 120R, and a reflective surface 120. Can be.

The outer housing 200 may form an appearance of the optical scanner 100. The outer housing 200 may be formed such that the front has a larger area than the rear. This may be in consideration of the radiation angle of light. The inner housing 160 may be located inside the outer housing 200. The inner housing 160 may be built in the outer housing 200. The inner housing 160 may have a cylindrical shape as a whole.

The rotating body 120R may rotate inside the inner housing 160. The rotating body 120R may be driven by a motor. The rotating body 120R may include reflective surfaces 120a, 120b, 120c, and 120d sequentially in the rotational direction. This means that as the rotor 120R rotates, not only the entire outer surface of the rotor 120R is formed, but also various reflection surfaces 120 may be provided.

The first reflective surface 1201 may be provided above the rotating body 120R, and the second reflective surface 1202 may be provided below the rotating body 120R. The areas of the first reflective surface 1201 and the second reflective surface 1202 may be different from each other. Reflective surface 120 may be a plurality of (120a, 120b, 120c, 120d). That is, it means that the rotating body can provide different reflective surfaces 120 while rotating.

The light emitting units 110 and 170 and the light receiving units 171 and 130 may be positioned between the inner housing 160 and the outer housing 200. The light emitting units 110 and 170 may include a light emitting device 110 and a lens 170. The light receiving units 171 and 130 may include a light receiving sensor 130 and a lens 171. The light emitters 110 and 170 may provide light to the first reflective surface 1201. The light receivers 171 and 130 may detect light reflected from the second reflective surface 1202. In this case, the reflective plate 172 may be provided between the light receiving sensor 130 and the second reflective surface 1202. Since the light emitting units 110 and 170 and the light receiving units 171 and 130 are spaced apart from each other, mutual interference due to an electromagnetic field may be minimized.

The inner housing 160 may include a hole 160h1 between the light emitting units 110 and 170 and the first reflective surface 1201. In addition, the inner housing 160 may have a hole 160h4 formed between the second reflecting surface 1202 and the light receiving parts 171 and 130. Accordingly, the light provided from the light emitting units 110 and 170 may be directed toward the inner housing 160, and may be reflected by the first reflective surface 1201 to the outside of the optical scanner 100. Light reflected from the outside of the optical scanner 100 and returned may be reflected by the second reflecting surface 1202 and sensed by the light receiving units 171 and 130 via the reflecting plate 172.

Referring to FIG. 27, the optical scanner 100 may include a main board 210, an outer housing 200, an inner housing 160, light emitting units 110 and 170, light receiving units 171 and 130, and an indicator light 223. have. Electronic devices may be mounted on the main board 210. The outer housing 200 may be mounted on the main board 210. The inner housing 160 may be mounted on the main board 210. The light emitting units 110 and 170 may be mounted on the main board 210, may be adjacent to the inner housing 160, and may be spaced apart from the light receiving units 171 and 130. The light receiving units 171 and 130 may be mounted on the main board 210, may be adjacent to the inner housing 160, and may be spaced apart from the light emitting units 110 and 170. The outer housing 200 may cover the inner housing 160, the light emitting units 110 and 170, and the light receiving units 171 and 130 on the main board 210.

The inner housing 160 may have a first opening 160P1 through which a portion of the first reflective surface 1201 is exposed to the outside. The inner housing 160 may have a second opening 160P2 through which a portion of the second reflective surface 1202 is exposed. The windows 221 and 222 may be located in front of the outer housing 200. A plurality of windows 221 and 222 may be provided. The first window 221 may face the first opening 160P1. The second window 222 may face the second opening 160P2.

The first window 221 may be an area where light reflected through the first reflective surface 1201 is emitted. The second window 222 may be a region through which light emitted through the first window 221 is reflected by an external object and then passes toward the optical scanner 100. Light may be directed to the second reflective surface 1202 through the second window 222. The indicator light 223 may display information on whether the optical scanner 100 is operated, an operation state, a failure, and the like.

The first and second windows 221 and 222 may have different sizes. For example, the second window 222 may be larger than the first window 221. The second window 222 may be an area for receiving the light reflected from the object. Therefore, in order to effectively receive a relatively weak signal, it means that the size of the second window 222 may be larger. An internal structure corresponding to the first and second windows 221 and 222 may also correspond to the sizes of the first and second windows 221 and 222.

28 and 29 are diagrams showing examples of the operation of the optical scanner according to an embodiment of the present invention.

 Referring to FIG. 28, the light emitting device 110 may provide light L1 to the first reflective surface 1201 through the lens 170. The light emitting device 110 may be a laser diode LD. For example, the light emitting device 110 may be a pulse laser capable of providing light having a wavelength of 890 nm to 905 nm.

The light receiving sensor 130 and the light emitting element 110 may be positioned adjacent to each other. For example, it means that the light receiving sensor 130 and the light emitting device 110 may be configured on one PCB substrate. When the light receiving sensor 130 and the light emitting element 110 are disposed adjacent to each other, the light path therein may be simply configured. That is, the volume of the entire optical scanner 100 can be reduced.

The first reflective surface 1201 may form four surfaces of the upper portion of the rotating body 120R. For example, the first reflective surface 1201 may include a first angle surface 1201a, a second angle surface 1201b, a third angle surface 1201c, and a fourth angle surface 1201d. The first angle plane 1201a may have an inclination of 0 degrees from the z axis, the second angle plane 1201b may have an inclination of 2 degrees from the z axis, and the third angle plane 1201c may have a slope of 4 degrees from the z axis. The fourth angle plane 1201d may have an inclination of 6 degrees from the z-axis.

As the rotating body 120R rotates, the light L2 provided from the light emitting device 110 and reflected from the first reflective surface 1201 may be directed to the outside of the optical scanner 100 through the first window 221. In addition, the scan area SA may be detected or monitored. The light L3 reflected by the object OB present in the scan area SA may face the second reflective surface 1202 through the second window 222.

The second reflective surface 1202 may have a larger effective area than the first reflective surface 1201. The effective area may mean an area capable of reflecting light. In other words, the second reflecting surface 1202 may be formed longer in the left and right sides or longer in the vertical direction than the first reflecting surface 1201. The second reflecting surface 1202 may form four surfaces of the lower portion of the rotating body 120R. For example, the second reflective surface 1202 may include a first angular surface 1202a, a second angular surface 1202b, a third angular surface 1202c, and a fourth angular surface 1202d. The first angular plane 1202a may have an inclination of 0 degrees from the z axis, the second angular plane 1202b may have an inclination of 2 degrees from the z axis, and the third angular plane 1202c may have 4 degrees from the z axis. The fourth angle plane 1202d may have an inclination of 6 degrees from the z-axis. Each angle may correspond to the angular surfaces 1201a, 1201b, 1201c, and 1201d of the first reflective surface 1201. That is, the first reflecting surface 1201 and the second reflecting surface 1202 may form an outer surface of the rotating body 120R, and one surface of the outer surface of the rotating body 120R may be formed in a trapezoid shape as a whole. Means.

In other words, the first reflecting surface 1201 and the second reflecting surface 1202 may form four surfaces of the rotating body 120R, and one surface of the rotating body 120R may have a trapezoid shape as a whole. One surface of the rotor 120R may have an angle different from the other surface of the rotor 120R, and the angles thereof may be in the range of 0 to 6 degrees, as described above.

Light L4 reflected from the second reflective surface 1202 may flow into the light receiving sensor 130 through the lens 171. In this case, since the intensity of the light L1 provided from the light emitting device 110 is significantly stronger than the intensity of the light L3 or L4 which is detected by being introduced into the light receiving sensor 130, it is reflected or reflected from the first reflecting surface 1201. The light shield plate 140 optically isolates the first reflecting surface 1201 and the second reflecting surface 1202 to prevent scattered light from entering the light receiving sensor 130 and causing malfunction of the optical scanner 100. You can. In this case, the light blocking plate 140 extends to the inner surface of the inner housing 160 and adjacent to the shield unit 150 to effectively achieve optical isolation between the first reflecting surface 1201 and the second reflecting surface 1202. . In other words, the step portions 1401, 1402 or 1403 provided at one end of the light blocking plate 140 and the shield part 150 provided on the inner surface of the inner housing 160 overlap each other and rotate to form the first reflective surface 1201. Optical isolation of the second and second reflecting surfaces 1202 can be effectively achieved.

In addition, measurement of light as a reference may be made according to the rotation of the rotor 120R. For example, the first reflecting surface 1201 and the second reflecting surface 1202 form four surfaces of the rotating body 120R, and among the four first reflecting surfaces 1201 and the second reflecting surface 1202. When the reference reflecting surfaces 1801 and 1802 are provided on any one surface, the reference light may be measured for each rotation of the rotating body 120R. Accordingly, values for measuring the distance of the scan area SA may be corrected, and the accuracy of the optical scanner 100 may be improved.

Referring to FIG. 29, the optical scanner 100 may include a reflector 172 between the second reflecting surface 1202 and the optical path of the light receiving sensor 130. The light receiving sensor 130 may be spaced apart from the light emitting device 110 by a considerable distance. This may be to minimize the influence of electromagnetic fields that may occur between the electronic elements. The reflective plate 172 may be positioned at the position of the light receiving sensor 130 described with reference to FIG. 30. The light receiving sensor 130 may be spaced apart from the reflecting plate 172 and the light emitting device 110 by a predetermined distance, and may detect light reflected from the reflecting plate 172. That is, the reflecting plate 172 may look at the second reflecting surface 1202 and the light receiving sensor 130 at the same time to change the path of the light reflected from the second reflecting surface 1202 toward the light receiving sensor 130.

30 to 33 illustrate other examples of the optical scanner according to an embodiment of the present invention.

Referring to FIG. 30, the optical scanner 100 includes a light emitting element 110, a first lens 170, a rotating body 120R, a first reflecting surface 1201, a second reflecting surface 1202, and a third half. A slope 1203, a first light blocking plate 1401, a second light blocking plate 1402, a reflecting plate 172, a second lens 171, and a light receiving sensor 130 may be included. The third reflective surface 1203 may be formed on the first reflective surface 1202. In addition, the second light blocking plate 1402 may be positioned between the first reflective surface 1201 and the third reflective surface 1203. In this case, the second light blocking plate 1402 may not include a slit for the reference light path.

Light provided from the light emitting device 110 may be directed to the first reflective surface 1201 through the first lens 170. The reflector plate 172 may have an opening 172h. The opening 172h may be formed on an optical path of light provided from the light emitting element 110. That is, the light provided from the light emitting element 110 may be directed to the first reflective surface 1201 through the first lens 170 and the opening 172h.

Light reflected from the first reflecting surface 1201 may go out of the optical scanner 100. A portion of the light flowing from the outside of the optical scanner 100 to the inside may be reflected by the second reflecting surface 1202 and directed toward the lower portion of the reflecting plate 172. The other part of the light introduced from the outside of the optical scanner 100 may be reflected by the third reflecting surface 1203 and directed toward the upper portion of the reflecting plate 172. Upper and lower lengths of the reflective plate 172 may be formed to cover the second and third reflective surfaces 1202 and 1203. Accordingly, the light receiving rate of the light reflected from the object may be improved. This means that the precision or performance of the optical scanner 100 can be improved.

Light reflected from the reflector 172 may be detected by the light receiving sensor 130 through the second lens 171. In this case, the first light blocking plate 1401 may prevent mutual interference between light reflected from the first reflective surface 1201 and light reflected from the second reflective surface 1202. In addition, the second light blocking plate 1402 may prevent mutual interference of light reflected from the first reflective surface 1201 and light reflected from the third reflective surface 1203. Accordingly, malfunction of the optical scanner 100 can be prevented, and the accuracy of the optical scanner 100 can be improved.

The size of the second lens 171 may be larger than the size of the first lens 170. This may mean that one diameter of the second lens 171 may be larger than one diameter of the first lens 170. The outer edge of the second lens 171 may be processed in a straight line as necessary. The correlation between the size of the second lens 171 and the size of the first lens 170 may be formed according to the sizes of the second and third reflective surfaces 1202 and 1203 and the first reflective surface 1201. The vertical length of the second lens may be formed to cover the second and third reflective surfaces. That is, the light reflected by the second and third reflective surfaces may be sensed by the light receiving sensor through the second lens.

Referring to FIG. 31, the optical scanner 100 may include a reference reflecting surface 180. The reference reflective surface 180 may be positioned on the first reflective surface 1201 or the second reflective surface 1202. The reference reflective surface 180 may be provided in plural. The plurality of reference reflecting surfaces may include a first reference reflecting surface 1801 and a second reference reflecting surface 1802. The first reference reflective surface 1801 may be located on the first reflective surface 1201, and the second reference reflective surface 1802 may be located on the second reflective surface 1202.

As the rotor 120R rotates, the first reflecting surface 1201, the second reflecting surface 1202, and the third reflecting surface 1203 may rotate. When the first reflecting surface 1201, the second reflecting surface 1202, and the third reflecting surface 1203 of the rotating body 120R reach a predetermined position, the light provided from the light emitting element 110 is the first reference reflecting surface. 1801 can be reached. The light reaching the first reference reflecting surface 1801 may be reflected to face the second reference reflecting surface 1802, and the light reflected from the second reference reflecting surface 1802 may be reflected by the light receiving sensor (172). 130 may be sensed by the light receiving sensor 130. Such a light path may be used as light that is a reference of the optical scanner 100. Light as a reference means that the optical scanner 100 may be a reference in optical measurement for detecting or monitoring a certain area.

In more detail, the optical scanner 100 should correct the result of the distance measurement for the distance measurement of the scan area SA, and the correction is performed by measuring the reference light. That is, the measurement of the reference light is to compensate or compensate for the drift of the electronic circuit constituting the optical scanner 100 when measuring the distance of the scan area SA.

The drift phenomenon of the electronic circuit may be compensated or compensated by subtracting the distance value by measuring the reference light from the distance value measured by the optical scanner 100 in the scan area SA.

The first reference reflective surface 1801 may be located adjacent to one side of the first reflective surface 1201. For example, the first reference reflective surface 1801 may be located on one side of the first angled surface 1201a of the first reflective surface 1201. For another example, the first reference reflective surface 1801 is positioned on one surface of the first angled surface 1201a of the first reflective surface 1201, and the position thereof is a first angled surface of the first reflective surface 1201. It may be adjacent to the boundary of the 1201a and the second angular surface 1201b. The first reference reflective surface 1801 may be inclined toward the lower portion of the rotating body 120R. That is, the first reference reflective surface 1801 may protrude in an inverted triangle shape from the first reflective surface 1201. In this case, a surface of the inverted triangular shape facing the lower portion of the rotating body 120R may be the first reference reflective surface 1801.

The second reference reflecting surface 1802 may be located adjacent to one side of the second reflecting surface 1202. For example, the second reference reflecting surface 1802 may be located at one side of the first angular surface 1202a of the second reflecting surface 1202. For another example, the second reference reflecting surface 1802 is positioned on one surface of the first angled surface 1202a of the second reflective surface 1202, and the position thereof is the first angled surface of the second reflective surface 1202. It may be adjacent to the boundary of the 1202a and the second angular surface 1202b. The second reference reflecting surface 1802 may be inclined toward the upper portion of the rotating body 120R. That is, the second reference reflecting surface 1802 may protrude in a triangular shape from the second reflecting surface 1202. In this case, a surface of the triangular shape facing the top of the rotating body 120R may be the second reference reflecting surface 1802.

The first light blocking plate 1401 may include a slit 140S. The slit 140S may be positioned below the first reference reflective surface 1801 and may be positioned above the second reference reflective surface 1802. That is, the slit 140S may be located between the first reference reflecting surface 1801 and the second reference reflecting surface 1802. The first reference reflecting surface 1801 may face the second reference reflecting surface 1802 through the slit 140S, and the second reference reflecting surface 1802 may refer to the first reference reflecting surface (slit 140S). 1801). In other words, the slit 140S may provide a path of reference light between the first and second reference reflection surfaces 1801 and 1802.

 Accordingly, it is possible to minimize the size of the optical scanner 100, to provide a path of the reference light while reducing the manufacturing cost.

Referring to FIG. 32, the optical scanner 100 may include an outer housing 200, an inner housing 160, light emitting units 110 and 170, light receiving units 171 and 130, a rotating body 120R, and a reflective surface 120. Can be.

The outer housing 200 may form an appearance of the optical scanner 100. The outer housing 200 may be formed such that the front has a larger area than the rear. This may be in consideration of the radiation angle of light. The inner housing 160 may be located inside the outer housing 200. The inner housing 160 may be built in the outer housing 200. The inner housing 160 may have a cylindrical shape as a whole.

The rotating body 120R may rotate inside the inner housing 160. The rotating body 120R may be driven by a motor. The rotating body 120R may include reflective surfaces 120a, 120b, 120c, and 120d sequentially in the rotational direction. This means that as the rotor 120R rotates, not only the entire outer surface of the rotor 120R is formed, but also various reflection surfaces 120 may be provided.

The first reflecting surface 1201 may be provided at the center of the rotating body 120R, and the second reflecting surface 1202 may be provided below the rotating body 120R, and the upper portion of the rotating body 120R may be provided. The third reflective surface 1203 may be provided. Areas of the first to third reflective surfaces 1201, 1202, and 1203 may be different from each other. Reflective surface 120 may be a plurality of (120a, 120b, 120c, 120d). That is, it means that the rotating body can provide different reflective surfaces 120 while rotating.

The light emitting units 110 and 170 and the light receiving units 171 and 130 may be positioned between the inner housing 160 and the outer housing 200. The light emitting units 110 and 170 may include a light emitting device 110 and a lens 170. The light receiving units 171 and 130 may include a light receiving sensor 130 and a lens 171. The light emitters 110 and 170 may provide light to the first reflective surface 1201. Light provided from the light emitting units 110 and 170 may face the first reflective surface 1201 through the opening 172h.

The light receivers 171 and 130 may detect light reflected from the second and third reflective surfaces 1202 and 1203. In this case, the reflective plate 172 may be provided between the light receiving sensor 130 and the second reflecting surface 1202 and between the light receiving sensor 130 and the third reflecting surface 1203. Since the light emitting units 110 and 170 and the light receiving units 171 and 130 are spaced apart from each other, mutual interference due to an electromagnetic field may be minimized.

The inner housing 160 may include a hole 160h1 between the light emitting units 110 and 170 and the first reflective surface 1201. In addition, the inner housing 160 may have a hole 160h4 formed between the second reflecting surface 1202 and the light receiving parts 171 and 130. In addition, the inner housing 160 may have a hole 160h5 formed between the third reflecting surface 1203 and the light receiving parts 171 and 130. In other words, the inner housing 160 may have a hole 160h4 formed between the second reflecting surface 1202 and the lower portion of the reflecting plate 172, and between the third reflecting surface 1203 and the upper portion of the reflecting plate 172. Holes 160h5 may be formed in the holes.

Accordingly, the light provided from the light emitting units 110 and 170 may be directed toward the inner housing 160, and may be reflected by the first reflective surface 1201 to the outside of the optical scanner 100. Light reflected from the outside of the optical scanner 100 and reflected back may be reflected by the second reflecting surface 1202 and the third reflecting surface 1203 to be detected by the light receiving parts 171 and 130 via the reflecting plate 172.

Referring to FIG. 33, the optical scanner 100 may include a main board 210, an outer housing 200, an inner housing 160, light emitting units 110 and 170, light receiving units 171 and 130, and an indicator light 223. have. Electronic devices may be mounted on the main board 210. The outer housing 200 may be mounted on the main board 210. The inner housing 160 may be mounted on the main board 210. The light emitting units 110 and 170 may be mounted on the main board 210, may be adjacent to the inner housing 160, and may be spaced apart from the light receiving units 171 and 130. The light receiving units 171 and 130 may be mounted on the main board 210, may be adjacent to the inner housing 160, and may be spaced apart from the light emitting units 110 and 170. The outer housing 200 may cover the inner housing 160, the light emitting units 110 and 170, and the light receiving units 171 and 130 on the main board 210.

The inner housing 160 may have a first opening 160P1 through which a portion of the first reflective surface 1201 is exposed to the outside. The inner housing 160 may have a second opening 160P2 through which a portion of the second reflective surface 1202 is exposed. The inner housing 160 may have a third opening 160P3 through which a portion of the third reflective surface 1203 is exposed. The windows 221, 222, and 224 may be located in front of the outer housing 200. A plurality of windows 221, 222, and 224 may be provided. The first window 221 may face the first opening 160P1. The second window 222 may face the second opening 160P2. The third window 224 may face the third opening 160P3.

The first window 221 may be an area where light reflected through the first reflective surface 1201 is emitted. The second window 222 may be an area through which light emitted through the first window 221 is reflected by an external object and then passes toward the optical scanner 100. Light may be directed to the second reflective surface 1202 through the second window 222. The third window 224 may be an area where light emitted through the first window 221 is reflected by an external object and then passes toward the optical scanner 100. Light may be directed to the third reflective surface 1203 through the third window 224. FIG. 34 is a block diagram of an optical scanner according to an embodiment of the present invention, and FIG. 35 is a diagram of the present invention. FIG. 1 is a diagram illustrating an example of abnormality detection of an optical scanner, according to an exemplary embodiment.

Referring to FIG. 34, the optical scanner 100 may include a control unit 10, a light emitting device 110, a light receiving sensor 130, a motor 20, a communication unit 30, and a power supply unit 40. . The control unit 10 and the communication unit 30 may be mounted on the main board 210. The power supply 40 may be built in the main board 210 or may be supplied from the outside of the optical scanner 100. The controller 10 may be electrically connected to the motor 20, the light emitting device 110, the light receiving sensor 130, the communication unit 30, and the power supply unit 40.

The controller 10 may process signals for TOF calculation, calculation of distance and angle information of an object, presence of a detection object, output of a safety signal, and motion state of the detection object. The controller 10 may record the light emitting time of the light emitting device 110 and the light receiving time of the light receiving sensor 130, and may perform calculation based on the TOF principle. Accordingly, the distance of the detection object can be determined and the angle information of the emitted laser can be calculated. The controller 10 may monitor the scan area SA set in the two-dimensional space based on the angle information and the distance information.

The communication unit 30 may transmit and receive information via wired and / or wireless. The communication unit 30 may communicate with an external server. For example, it means that the transmission and / or control command of the state of the optical scanner 100 can be received through the communication unit 30.

Referring to FIG. 35, a plurality of optical scanners 100 may be used. The optical scanner 100 may be controlled by a central control center (CT). The optical scanner 100 may be connected to the central control center (CT) by wire and / or wireless. Information about the area SA detected or monitored by the optical scanner 100 may be observed at the central control center CT. Information on the state of the optical scanner 100 can also be observed in the central control center (CT). For example, when an abnormality in the operation of the optical scanner 100 is detected, the central control center CT may determine which optical scanner 100 shows the abnormality. The abnormality of the optical scanner 100 may be, for example, a lowering of the rotational speed of the rotating body 120R, inability to detect light, a period abnormality of the reference light, and the like.

It is apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential features of the present invention. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

Claims (17)

1. housing;

   A rotating body rotating in the housing and including a plurality of reflective surfaces;

   A light shielding plate extending from the rotating body toward an inner surface of the housing and separating each of the plurality of reflective surfaces into a first reflective surface and a second reflective surface;

   A light emitting unit providing light to the first reflective surface; And,

   And a light receiver configured to detect light reflected from the second reflective surface.
2. The method of claim 1,

   Further comprising a shield extending from the inner surface of the housing toward the light blocking plate,

   And at least a portion of the light blocking plate and the shield part.
3. The method of claim 2,

   The light blocking plate is formed with a step at one end,

   The shield unit, the optical scanner overlaps in the step.
4. The method of claim 1,

   The first reflecting surface is located above the rotating body,

   The second reflective surface is located below the rotating body.
5. The method of claim 1,

   The vertical height of the first reflective surface is smaller than the vertical height of the second reflective surface,

   The left and right widths of the first reflecting surface are smaller than the left and right widths of the second reflecting surface.
6. The method of claim 1,

   The first reflective surface is provided with a plurality,

   The plurality of first reflective surfaces have different inclinations with respect to the axis of rotation of the rotating body,

   The second reflection surface is provided with a plurality,

   And the plurality of second reflecting surfaces have different inclinations with respect to the axis of rotation of the rotating body.
7. The method of claim 1,

   A first reference reflector protruding from the first reflecting surface; And,

   And a second reference reflecting surface protruding from the second reflecting surface.
8. The method of claim 7, wherein

   The light shield plate,

   And a slit formed between the first reference reflecting surface and the second reference reflecting surface.
9. The method of claim 7, wherein

   The first reference reflecting surface is inclined to face the light emitting portion and the second reference reflecting surface,

   And the second reference reflecting surface is inclined to face the first reference reflecting surface.
10. The method of claim 7, wherein

    The first reference reflective surface is located adjacent to at least one edge of the first reflective surface,

    And the second reference reflecting surface is positioned below the first reference reflecting surface to correspond to the first reference reflecting surface.
11. The method of claim 1,

    The first reflecting surface and the second reflecting surface,

    And a side surface of the rotating body sequentially formed so that a flat cross section of the rotating body becomes a polygon.
12. The method of claim 1,

    And first and second reference reflecting surfaces positioned outside the housing.

    The first reference reflective surface,

    Located at a height corresponding to the first reflective surface,

    The second reference reflective surface,

    Located at a height corresponding to the second reflecting surface,

    The housing is

    A first hole formed between the first reflective surface and the first reference reflective surface, and

    And a second hole formed between the second reflective surface and the second reference reflective surface.
13. The method of claim 7, wherein

    And a reflector positioned between the light receiving portion and the second reflecting surface.

    And the reflector is positioned on an optical path between the light receiving portion and the second reflecting surface.
14. The method of claim 9,

    The light provided by the light emitting unit is

    Is reflected from the first reference reflecting surface and faces the second reference reflecting surface,

    And an optical scanner reflected from the second reference reflecting surface and directed toward the light receiving unit.
15. The method of claim 1,

    The light emitting unit and the light receiving unit,

    Located outside of the housing,

    The housing is

    A first opening formed between the light emitting portion and the first reflective surface, and

    And a second opening formed between the light receiving portion and the second reflecting surface.
16. The method of claim 15,

    And a reflector positioned between the light receiving portion and the second reflecting surface.

    The second opening is,

    Is formed between the second reflecting surface and the reflecting plate,

    And the light emitting part and the light receiving part are spaced apart from each other.
17. The method of claim 1,

    The light emitting unit and the light receiving unit,

    Optical scanner located on one PCB board.

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