JP5084063B2 - Target for measurement - Google Patents

Description

  The present invention relates to a measurement target that is attached to a measurement target as a target when measuring a distance to the measurement target.

  Conventionally, for example, for measuring a reflection element (reflecting plate, reflecting prism, etc.) oscillated from a so-called total station (measuring device that measures the distance and angle to a measuring object using light waves, lasers, etc.) and attached to the measuring object. The light wave (or laser etc.) reflected by the target) is detected by the total station, and the distance, horizontal angle, vertical angle, etc. to the reflecting element and the measurement object are measured at the construction site. .

  For example, during work (construction) in which a steel frame is assembled using a crane, etc., are pillars extending in the vertical direction and beams extending in the horizontal direction installed exactly as designed? It is used when confirming etc.

  More specifically, for example, several reflecting elements (measurement targets) are attached to one steel frame to be installed, and the total station irradiates each reflecting element with light waves and detects the reflected light waves, and reflects each reflection. It is used to check whether the steel frame is installed at the designed position without tilting by measuring the distance to the element, horizontal angle, vertical angle, etc.

Here, as a reflective element that is attached to a measurement target and reflects a light wave, for example, there is one described in Patent Document 1.
In Patent Document 1, a sheet-like reflecting prism is attached to the surface, and a reflecting plate having a cross line indicating the center of the target formed on the reflecting prism surface can be adjusted and positioned around a vertical supporting shaft and a horizontal supporting shaft. A coordinate measurement target (see FIGS. 1 to 3 of Patent Document 1) is described which is configured to be supported and to be slid in the vertical support shaft direction so that the position of the cross wire relative to the horizontal support shaft can be adjusted.
Patent Document 1 describes a coordinate measurement target including a prism as a reflection element as a conventional technique (see FIG. 4 of Patent Document 1).

  Patent Document 2 describes a target device used in a non-prism light wave distance measuring device, in which at least one reflecting surface is formed on a base, and a reflecting surface of a reflecting sheet having retroreflection is colored. Have been described.

No. 7-50661 JP 2000-329556 A

  Here, in recent years, the construction period has become longer due to the larger and higher-rise buildings, so there are increasing opportunities for various adverse effects on the neighborhood. If you want to reduce the amount of traffic, or if there is a large amount of daytime passers-by and traffic, such as in urban areas, there is a possibility that accidents or serious problems may occur due to construction, etc. It is also assumed that installation work will be performed.

  In such a case, the measurement using the total station is also performed at night. However, since the surroundings are dark, the measurement target described in Patent Document 1 and Patent Document 2 is used by the operator. It is difficult to discover.

Even if it can be found, there are the following problems.
That is, for example, in order to measure with high accuracy, a collimation mark (reticle) on a measuring device side such as a total station is placed on an alignment mark such as a cross line provided on a measurement target (reflection element). However, in the dark, it is difficult for the operator to recognize the crosshairs (alignment marks) provided on the measurement target (reflective element), and the alignment is good. Since it cannot be performed, it is difficult to measure itself, and even if it can be measured, there is a possibility that the reliability of the measurement accuracy remains doubtful.
Such a fear can occur in other dark places, for example, in construction work such as a tunnel (for example, installation work of a support work).

  For this reason, conventionally, for example, as schematically shown in FIG. 5, measurement work in the dark is usually performed by two workers, and one worker illuminates with a flashlight or the like as a measurement target. In addition, the operator can perform measurement by aligning the collimation (reticle) of the measuring device such as the total station with the alignment mark (such as a cross) of the measurement target. Until then, the troublesome work of continuing to illuminate the measurement target with a flashlight or the like was required.

  However, it is not easy to find all measurement targets affixed to multiple parts with a flashlight etc. in a dark place where the scaffolding is not so good, the light intensity is small and the irradiation range is narrow, especially, When there is a certain distance to the measurement target, or when the measurement target is at a high place, discovery may be difficult.

  Furthermore, even when the measurement target can be found, when the operator visually aligns the collimation (reticle) on the measurement device side such as the total station with the alignment mark (such as a cross) on the measurement target side. The light quantity of a flashlight or the like is so dark that the operator may not be able to accurately recognize the alignment mark (such as a cross) on the measurement target side and may not be able to collimate.

  In addition, if it is difficult to recognize the alignment mark on the measurement target side and the light intensity of the flashlight is increased by, for example, some method to illuminate the measurement target brightly, this time, the reflective element of the measurement target will be reflected. There is a possibility that the operator may not be able to recognize the alignment mark (such as a crossed letter) of the measurement target due to the influence of the light reflected by the beam, and the collimation cannot be performed.

  By the way, prisms with LED lights (trade name: ST-030L, manufactured by STS Corporation, URL: http://www.sts-s.co.jp/lineup/prism/prism.html) are sold. Some LED lamps flash when they are pressed, making it suitable for cases where it is difficult to find a prism in a dark place such as a tunnel.

  However, this is expensive because it uses a prism. Moreover, in order to attach to a measuring object so that it is suitable for a measurement, some attachment jigs, such as an adapter, are needed, and cost increases and attachment / detachment work becomes complicated.

  In particular, when assembling steel frames etc., it is necessary to attach measurement targets at least near both ends of one beam and to attach to pillars near both ends as well as work time for attachment / detachment. Since it is necessary to attach to a plurality of steel frames in advance in order to reduce the above, the number to be prepared is large and the cost increases.

  In order to reduce the cost, it may be possible to use a relatively small number of prisms with LED lights. There is a situation in which work efficiency is reduced, for example, measurement work is interrupted by such troublesome work.

  Furthermore, in the case of measuring the position and inclination of a column or beam, a structure in which a prism is attached using an adapter or the like is likely to place the measurement target at a position offset from the central axis or surface of the column or beam. There is a situation that the measurement work becomes complicated, for example, the minute needs to be corrected.

  In particular, when performing a large number of measurements, there is a situation in which the prism is attached using an adapter and the amount of correction is different each time because the degree of attachment is different, which makes the measurement work extremely complicated.

  In addition, since the prism is relatively heavy, there is a possibility that the prism may be tilted from the initial mounting position over time, and there is a situation that the mounting work becomes troublesome because it is necessary to firmly support the mounting.

  In view of such circumstances, the applicant of the present application is a plate-like measurement target provided with a reflection sheet that reflects measurement waves emitted from a measurement device attached to a measurement object in Japanese Patent Application No. 2009-279309. In addition, a light emitter that emits light when supplied with power is attached integrally with the measurement target, and the light emitted from the light emitter emits light from the measurement target to the outside, and is provided on the reflection surface of the reflection sheet. A measurement target was proposed in which the mark for alignment with the collimation on the device side was illuminated.

  Although the measurement target proposed in Japanese Patent Application No. 2009-279309 has a simple and low-cost configuration, the operator can easily recognize the location even in a dark place, and is aligned in relation to the measurement apparatus. It is possible to contribute to making it possible to make the measurement easy and accurate by clearly recognizing the alignment mark such as a cross-shaped character for helping.

  However, although this measurement target is significantly thinner than conventional prisms with LED lights, it is desirable to further reduce the thickness depending on the user's requirements and usage conditions.

  By reducing the thickness, the offset (thickness) of the measurement target surface from the surface of the column or beam can be reduced, so that the measurement error due to the offset can be reduced and the measurement accuracy can be improved. it can. In addition, if the offset is large, it is necessary to add or subtract the offset from the normal coordinate value of the object to be measured. This can contribute to prevention of occurrence and simplification of measurement work.

  In addition, in such a measurement target, for example, when the alignment mark is a cross, for example, it is necessary to illuminate a plurality of directions, so it is necessary to provide a plurality of light emitters. As a structure for this, relatively large power consumption is achieved. In response to this, a structure with a relatively large-capacity power supply exterior (structure that separates the measurement target part from the power supply part) was often adopted, but it should be integrated from the standpoint of preventing fall and ease of handling. Is desired. In order to integrate the measurement target portion and the power supply portion so as to be easy to handle, it is necessary to devise a means for reducing the capacity of the power supply portion.

  The present invention has been made in view of such circumstances, and while being a simple and low-cost configuration, an operator can easily recognize the location even in a dark place, and helps alignment in the context of a measuring apparatus. This makes it possible to clearly recognize alignment marks such as cross-shaped characters for easy and accurate measurement, and to achieve a measurement target that can be made thinner and easier to handle. The purpose is to provide.

For this reason, the present invention
A plate-like measurement target that is attached to a measurement object and includes a reflection sheet that reflects measurement waves emitted from a measurement device,
A reflective sheet;
A translucent plate having translucency disposed on the back surface of the reflective sheet;
An illuminant that emits light when supplied with power;
Is provided,
While the light emitted from the light emitter is guided to the translucent plate ,
The reflection sheet is provided with an opening penetrating the front and back surfaces, and a groove is provided on the front surface side of the translucent plate corresponding to the opening .

  In the present invention, the reflecting surface of the reflecting sheet may be provided with a mark for alignment with a collimation on the measuring device side.

  In the present invention, the opening may be formed so as to constitute a part of a mark for alignment with a collimation on the measuring apparatus side provided on the reflection surface of the reflection sheet.

  In the present invention, the groove may be filled with a diffusion member that diffuses light.

  In the present invention, the translucent plate may be characterized in that a reflective surface for reflecting light is provided on the back surface facing the front surface on which the reflective sheet is disposed.

  In the present invention, the light emitter is disposed in the vicinity of the center of the plane of the light transmitting plate, and the light emitting direction of the light emitter is disposed so as to face the reflecting surface of the light transmitting plate. Can do.

  The present invention has a simple and low-cost configuration, and allows an operator to easily recognize the location even in a dark place, and a positioning mark such as a cross to assist the positioning in relation to the measuring device. Can be recognized clearly and measurement can be performed easily and accurately, and further, the thickness can be further reduced, and a measurement target excellent in handling can be provided.

1 is an overall configuration diagram schematically showing an overall configuration of a measurement target according to an embodiment of the present invention. It is the perspective view which looked at the acrylic board (processed state of a recessed part, a groove | channel, etc.) which comprises the measurement target which concerns on embodiment same as the above from diagonally upward. It is the perspective view which looked at the acrylic board (state in which LED, the power supply part, and the power switch have been mounted | worn) from diagonally upward for demonstrating the manufacturing process of the measurement target which concerns on embodiment same as the above. It is the perspective view which looked at the acrylic board (The state with which the magnet was mounted | worn and the silicon-type resin was filled to the groove | channel) for demonstrating the manufacturing process of the measuring target which concerns on embodiment same as the above. It is the figure which showed typically an example of the measurement operation | work in the conventional dark place.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention will be described with reference to the accompanying drawings. The present invention is not limited to the embodiments described below.

  The inventor is attached to a measurement object in a dark place such as a construction site at night or tunnel construction, and reflects a measurement wave (light wave, laser, etc.) from a measurement device such as a total station at the time of measurement. In view of the fact that it will be difficult to find a measurement target having a crossed letter to match the side collimation (reticle), various examinations, researches, and experiments have been conducted. As a result, the cost is low. However, a measurement target that can be surely found even in a dark place and can sufficiently function as a measurement target, can be made thinner, and is easy to handle. Successfully realized.

  That is, the present inventor uses a commercially available reflective sheet as a measurement target, and the measurement target itself emits light so that the measurement target can be easily found even in a dark place. When aligning with the side collimation (reticle), it is possible to accurately recognize the alignment mark (such as a cross or circle) on the measurement target, so that alignment is performed easily and accurately. Therefore, a measurement target that enables accurate and highly reliable measurement is realized with a configuration that is easy to handle while further reducing the thickness.

Hereinafter, a specific configuration example will be described.
As shown in FIG. 1, a measurement target 1 according to an embodiment of the present invention is a commercially available reflection sheet, which is a general-purpose reflection sheet used for road signs, survey targets, and the like. 10 (for example, <diamond grade> reflective sheet (tape) (prism-type reflective sheet (tape)) manufactured by Sumitomo 3M Limited).

  This reflection sheet 10 (for example, 50 mm square size) is affixed to a transparent acrylic plate 20 (corresponding to a translucent translucent plate). However, it is not limited to transparent, but can be translucent. Moreover, not only colorless (clear) but also transparent (semi-transparent) colored (including fluorescent color) can be used. Further, the material is not limited to acrylic, and glass or other resin (for example, polycarbonate) can be used.

  As shown in FIGS. 1 and 2, the acrylic plate 20 used in the present embodiment has a thickness of about 2 mm and is provided outside the corresponding portion of the surface 21 to which the reflective sheet 10 is attached. An extension portion for attaching the power switch 50 is provided.

  As shown in FIG. 1, the power supply unit 40 can be configured to accommodate, for example, one dry cell (single size, etc.).

  Here, as shown in FIG. 2, a transparent acrylic plate (about 50 mm × 60 mm) having a thickness of about 2 mm can be used as the acrylic plate 20, but the back side of the surface 21 to which the reflective sheet 10 is attached. A mirror surface element (a mirror sheet, a mirror paint, etc .; a reflective surface that reflects light) 23 is applied to the back surface 22 of the mirror. The mirror surface (reflecting surface) does not need to reflect all the light, but only needs to reflect light more than a predetermined amount.

  Accordingly, the light incident from the front surface 21 side of the acrylic plate 20 is reflected by the mirror element 23 applied to the rear surface 22 and returned to the front surface 21 side again.

  Note that light is not incident on the acrylic plate 20 side from the back side of the mirror surface element 23 (that is, the back side of the measurement target 1) as in the case of a normal mirror.

  A concave portion 24 is engraved on the surface 21 of the acrylic plate 20 according to the present embodiment to accommodate a chip-type LED (Laser Emitting Diode) 30 as a light emitter.

  As the chip-type LED 30 accommodated in the recess 24, for example, a small and thin LED having a thickness of 3 mm square and a thickness of 2 mm or less can be used. Note that although the emission color can be green from the viewpoint of good visibility, LEDs of other emission colors can be employed as required.

  Further, in the recess 24, a groove 25 formed along a cross-shaped pattern for matching with the collimation (reticle) on the measuring device side displayed on the surface of the reflection sheet 10 as shown in FIG. 26, 27, and 28 are connected.

  The grooves 25, 26, and 27 may be U-shaped grooves having a width of about 2 mm and a depth of about 1 mm, but may be grooves having a V-shaped cross section.

  The groove 28 has a width substantially equal to the width of the accommodating portion 24 and is formed wider than the other grooves 25, 26, and 27. In order to supply power to the chip-type LED 30, the groove 28 is formed. (For example, a thin plate-like wiring) can be accommodated. In addition, if a wiring etc. protrude from the plane of the surface 21, an unevenness | corrugation and a wave shape will arise on the surface of the reflective sheet 10 affixed on it, and it has a bad influence, Therefore The plane of the surface 21 can be formed as flat as possible. desirable.

  By the way, the longitudinal centers of the grooves 25, 26, 27, 28 are arranged so as to substantially coincide with the center of the cross pattern displayed on the reflection sheet 10. As shown in FIG. 1, a part of the cross-shaped pattern of the reflection sheet 10 is cut out and opened to form an elongated opening (slit) 10A. Regarding the groove 28, it is desirable that the wiring be laid out so that the opening 10A and the wiring do not overlap.

  As shown in FIG. 2 and the like, a concave portion corresponding to the bottom portion of the power supply unit 40 is formed in a portion where the power supply unit 40 of the acrylic plate 20 is provided, and the position of the bottom portion is regulated by the concave portion. The portion 40 is firmly fixed to the acrylic plate 20 by bonding or fastening.

  In the present embodiment, as shown in FIG. 1 and the like, a power switch 50 is attached in the vicinity of the power supply unit 40. By operating the power switch 50, the power supply unit 40 and the LED 30 are connected to each other. The LED 30 is turned on when energized. However, the power switch 50 may be configured to be turned on / off by a remote controller or the like.

Here, an example of manufacturing the measurement target 1 according to the present embodiment will be illustrated.
First, as shown in FIG. 2, necessary recesses 24, grooves 25 to 28, power supply recesses, power switch recesses, and magnet recesses are formed on the acrylic plate 20 cut into a predetermined size, for example, by milling. To form.

  Next, as shown in FIG. 3, the light emitting surface of the chip-type LED 30 faces the lower side (the mirror element 23 side) in the recess 24 provided near the center of the plane of the acrylic plate 20 to which the reflective sheet 10 is adhered. Thus, the chip-type LED 30 is inserted, and the power supply unit 40 and the power switch 50 are attached to the corresponding recesses, and the chip-type LED 30 and the power supply unit 40 are electrically connected.

Subsequently, as shown in FIG. 4, the grooves 25, 26, 27, and 28 are filled with colorless transparent or translucent silicon-based resin (corresponding to a diffusion member). A colored resin can also be used.
Moreover, the magnet 60 is attached to the recessed part for magnets.

  And when resin hardens | cures, the reflective sheet 10 is stuck on it, and the target for a measurement as shown in FIG. 1 is completed.

  Here, a cross-shaped pattern is displayed on the surface of the reflective sheet 10, but as described above, a part of the cross-shaped pattern is cut out, and as shown in FIG. Is configured so that the silicon-based resin (diffusion member) filled in the grooves 25, 26, 27, and 28 faces.

  As the magnet 60 attached to the back surface 22 of the acrylic plate 20, for example, a magnet having a thickness of about 1 mm and a diameter of about 5 mm can be employed. As the magnet 60, for example, a neodymium magnet or the like can be employed.

  In addition, the magnet 60 is arrange | positioned, for example in the recessed part provided in the four corners of the back surface of the acrylic board 20, etc., It can avoid that the thickness of the measuring target 1 increases by the thickness of the magnet 60. However, the present invention is not limited to this configuration, and a configuration in which the magnet recess is omitted may be employed. In addition, although the magnetic attractive force is slightly inferior, it is possible to adopt a configuration in which a magnet sheet or the like is attached to a relatively wide area on the back surface of the measurement target 1 instead of the magnet 60.

  In the measurement target 1 according to the present embodiment having the above-described configuration, when the chip-type LED 30 is caused to emit light, the chip-type LED 30 is attached on the back surface side of the reflection sheet 10 and facing downward toward the mirror surface sheet 22. Light is emitted from the chip-type LED 30 toward the specular sheet 22 side.

  The irradiated light is reflected by the mirror sheet 22 through the transparent acrylic plate 20 and is directed toward the back surface of the reflective sheet 10.

  A part of the light reflected by the mirror sheet 22 is guided to the silicon-based resin filled in the grooves 25, 26, 27, and 28, and is diffused there and at least one of the diffused light. The portion is irradiated to the outside from the opening 10A from which a part of the cross-shaped pattern is cut out.

  In the present embodiment, the grooves 25 to 28 are engraved, and the groove is filled with a member having a refractive index different from that of the acrylic plate 20, so that relatively large diffusion may occur due to the angle of the boundary surface. Therefore, compared to the case where the grooves 25 to 28 are not provided or the case where the grooves 25 to 28 are not filled with silicon, it is possible to irradiate the light having a substantially uniform intensity from the entire opening 10A. It has become.

  Further, another part of the light reflected by the mirror sheet 22 is guided to the side surface of the acrylic plate 20 and is irradiated to the outside (around the side of the measurement target 1).

  The light reflected by the mirror sheet 22 and reaching the back surface of the reflection sheet 10 is reflected by the back surface of the reflection sheet 10 and travels again toward the mirror sheet 22 through the acrylic plate 20 and the reflection sheet 10. The repetition of the reflection of light with the back surface of 10 is repeated with attenuation.

  In the middle of repeating this reflection, a part of the light is irradiated to the outside (measurement device side) from the cutout opening 10A from which a part of the cross-shaped pattern is cut out, and is guided to the side surface of the acrylic plate 20. Thus, the light is irradiated to the outside (around the side of the measurement target 1).

  Thus, in the measurement target 1 according to the present embodiment, when the chip-type LED 30 is caused to emit light, the surface of the measurement target 1 (here, the opening 10A from which a part of the cross-shaped pattern is cut out) and the side Since the light is emitted toward the outside, the operator can easily find the measurement target 1 even in a dark place.

  Further, in the present embodiment, as described above, the alignment marks (cross characters and circles) useful for alignment with the collimation (reticle) on the measurement apparatus side provided on the surface of the reflection sheet 10 are as described above. Alternatively, as shown in FIG. 1, a portion slightly apart from the crossing portion of the crossed characters is formed by cutting the reflecting sheet 10 into a thin shape.

  That is, as shown in FIG. 1, there is no cutout in a portion of about 5 mm to 10 mm in diameter from the center of the alignment mark 102, and the opening is cut out in an elongated manner intermittently in a partial region on the extension line of the cross 10A is provided.

  When such an opening 10A is provided, when the LED 30 is caused to emit light, light leaks from the opening 10A, so that it becomes easy for the operator to find the measurement target 1 while the elongated light leaking from the opening 10A is detected. Because it will form an extended line of a cross, exactly, even in a dark place, the operator must have a collimation (reticle) on the measuring device side and a mark for alignment (a cross or a circle). At the time of alignment, since the alignment mark can be recognized well, the alignment can be performed easily and accurately, and as a result, accurate and highly reliable measurement can be performed.

  That is, according to the present embodiment, by causing the LED 30 to emit light, an operator can easily find the measurement target 1 even in a dark place, and the collimation (reticle) and position on the measurement apparatus side. The alignment mark (cross-shaped or circular shape) can be easily and accurately aligned, so that accurate and highly reliable measurement can be performed.

  According to the present embodiment, since the mirror element 23 is used to efficiently utilize the reflection of light, the measurement target 1 can be configured by the thin acrylic plate 20 having a thickness of about 2 mm. As compared with the above, it is possible to further reduce the thickness.

  Moreover, according to this Embodiment, since it was set as the structure which utilized the reflection of light efficiently using the mirror surface element 23, even if it provides LED30 with little power consumption, for example, a required function is fully exhibited. Therefore, when the power source unit 40 has a long life or the same life, the reduction of the capacity can be promoted. By reducing the capacity, it is possible to realize the measurement target 1 that is integrally provided with the power supply unit 40, and it is possible to provide a measurement target that is lightweight, compact, and easy to handle.

  Furthermore, according to the present embodiment, since the measurement target 1 is configured using the reflective sheet 10, the acrylic plate 20, the mirror surface element 23, the LED 30, and the like that are easily available and inexpensive, the cost can be reduced. Therefore, it is possible to easily prepare the required amount of measurement target 1 without any shortage. For example, it is possible to reduce the necessity of frequently attaching and removing the measurement target 1 during the measurement operation. The opportunity to be interrupted is suppressed, and as a result, work efficiency can be maintained at a high level.

Furthermore, the measurement target 1 according to the present embodiment efficiently reflects the light emitted from the chip-type LED 30 by the reflection sheet 10, the acrylic plate 20, and the mirror surface element 23, so that the thickness is about 2 mm. Since the offset amount between the measurement object and the measurement target can be reduced, the measurement operation can be simplified and the measurement accuracy can be improved as compared with the conventional case. .
For example, if the thickness is 2 mm, it can be within the mechanical error range of the measuring device. Therefore, if the measurement is not performed strictly, the correction work for offsetting the coordinate value of the measurement object can be eliminated. it can.

  In addition, since the measurement target 1 according to the present embodiment has a configuration in which the magnet 60 is attached to the back surface thereof, when the measurement target is a magnetic material such as iron, the measurement target 1 can be arbitrarily set in any position and orientation. However, it is configured so that it can be pasted and can be easily and repeatedly removed when it is no longer needed (so that it can be easily and repeatedly attached to and detached from the measurement object).

  Therefore, according to the present embodiment, since the measurement object can be easily and repeatedly attached and detached, it is possible to simplify the attachment and detachment work and to be reused. Cost can also be reduced.

  In addition, since the measurement target 1 according to the present embodiment is attached to the measurement target using a magnetic force or the like, if there is an unevenness or a curved surface on the attachment portion of the measurement target, the measurement target 1 bends slightly along that. Is desirable from the viewpoint of adhesion and the like. Therefore, when there is such a requirement, in the present embodiment, the acrylic plate 10 or the like constituting the measurement target 1 can be made of a material or thickness that has flexibility. . In addition, since the measurement target may be a column having a circular cross section, in such a case, the measurement target 1 is attached with high adhesion along the mounting surface of the measurement target. This is advantageous in that it can effectively prevent dropping off.

  By the way, in this Embodiment, since the example which aimed at thinning of the measuring target 1 in the case of using the acrylic board 20 is shown, the light emitting surface of the chip-type LED 30 is on the lower side (the mirror surface element 23). However, the present invention is not limited to this configuration, and is disposed on the back surface of the reflective sheet 10 and on the back surface side of the reflective sheet 10. A translucent plate having a reflective surface (mirror element) that reflects toward the front surface on the back surface side, and a back surface of the reflective sheet 10 and a reflective surface (mirror surface element) of the translucent plate Any structure in which light emitted from the light emitter is incident is included in the scope of the present invention.

  That is, the type of the light emitter is not particularly limited as long as the light emitted from the light emitter is incident between the back surface of the reflection sheet 10 and the reflection surface (mirror element) of the light transmitting plate. In addition, a configuration in which the concave portion 24 and the like are provided and the light emitter is embedded in the light transmitting plate is not essential. Further, the light emission direction from the light emitter is not limited to the configuration in which the light is disposed so as to face the lower side (the mirror element 23 side) as described above. That is, by utilizing the reflection of light between the back surface of the reflection sheet 10 and the reflection surface (mirror element) of the light transmission plate, the side surface and the surface (opening of the reflection sheet 10) of the light transmission plate (acrylic plate 20). 10A) and the like can be used as long as they can emit a predetermined amount of light to achieve a desired external visual effect.

  Furthermore, the present invention is not limited to the configuration in which the light emitter is disposed in the substantially central portion of the reflective sheet 10, but when light from the light emitter is incident on the substantially central portion of the reflective sheet 10, Since the light emission of the measurement target 1 is easily made uniform, the visual effect and the like can be satisfactorily exhibited.

  Moreover, as a translucent board, the acrylic board etc. which are marketed etc. are not employ | adopted, For example, liquid resin can be poured and it shape | molds in plate shape. Then, at the time of the molding, for example, it is possible to mold (cast) the phosphor in an embedded state so that the phosphor is included.

  In the case of such a manufacturing (molding) method, the thickness of the translucent plate can be about 1 mm. Since the thickness is small, the required visual effect can be obtained by installing the light emitters at almost the center, regardless of the location of the light emitter and the direction of light emission. In addition, since the thickness is thin, it has flexibility, so that the measurement target 1 can be attached with high adhesion along the attachment surface of the measurement object, and dropping off can be effectively prevented.

  In the present embodiment, the configuration example including one LED 30 has been described. However, a plurality of light emitters can be provided according to various requirements.

  By the way, when the acrylic plate 20 is made translucent, for example, light is relatively easily diffused, so that the diffusion members filled in the grooves 25 to 28 and the grooves 25 to 28 can be omitted. It is.

  In addition, for example, when the translucent plate is molded by the above-described molding method, the thickness can be set to about 1 mm, so that the groove is formed regardless of whether the translucent plate is transparent or translucent. The diffusing member filled in 25 to 28 and the grooves 25 to 28 can be omitted. Even if these are omitted, an equivalent visual effect can be obtained.

  By the way, the acrylic plate 20 according to the present embodiment is provided with a mirror surface element (reflective surface) 23, which prevents light attenuation and efficiently irradiates the light of the LED 30 to the outside. If it is provided and a predetermined visual effect can be obtained, it can be omitted in some cases. For example, when the entire acrylic plate 20 emits light by applying light (irradiating from the side, etc.) (when using a fluorescent acrylic plate), or when the place where the measurement target 1 is attached reflects light Various cases can be assumed.

  Further, in the present embodiment, the opening 10A is not provided in the range of about 5 mm to 10 mm in diameter from the center of the alignment mark, but in this way, the area of the range left without being cut out is Since it can be almost equal to or larger than the area where the light wave (or laser, etc.) from the measuring device such as the total station hits, accurate reflection can be ensured at the time of measurement, and therefore accurate and reliable. It can contribute to high measurement.

  In addition, the power supply part 40 can also be set as the structure which combines a solar cell and a storage battery, for example, produces electric power with a solar cell when it is bright, and charges a storage battery.

  The power switch 50 can be configured to be turned on and off by manual operation as shown in FIG. 1 and the like, but can also be turned on and off by remote operation by a remote controller using infrared rays or the like. In addition, for example, a timer or the like can be used to automatically turn off after a predetermined period after switching on, or automatically turn on after a predetermined time after startup and further turn off after a predetermined time. .

  In addition, the shape and dimension of the grooves 25 to 28 can be appropriately changed according to demands such as the degree of diffusion. Moreover, the material with which the grooves 25 to 28 are filled can be appropriately changed according to a request such as the degree of diffusion.

  By the way, although the opening width of the opening 10A is shown as being slightly wider in FIG. 1 for easy viewing, it can be set to an opening width substantially equal to the line width of the alignment mark such as a cross. Further, the opening 10A is not limited to being formed by cutting out, and can be formed by punching or the like in the case of mass production.

  Further, in the present embodiment, the opening 10A is opened so as to constitute a part of the alignment mark. However, the present invention is not limited to this, and when light is emitted independently of the alignment mark, It is also possible to open it to a place where a measurer or the like can easily find it.

  In addition, when the object which attaches the measurement target 1 is a thing which does not have magnetism, these can be attached using an adhesive agent or a double-sided tape, and it is simple.

  In the above-described embodiment, the power supply unit 40, the power switch 50, and the like are integrally mounted on the measurement target 1 main body. However, the present invention is not limited to this. It can also be set as the structure which supplies electric power to LED30 of the target 1 for a measurement via a cable.

  The above-described measurement target 1 according to the present embodiment can be formed in a size of, for example, about 50 mm × 60 mm × 2 mm (length × width × thickness). For example, (1) assembling a steel frame or the like at a construction site at night Measurement of the position and inclination of steel frames, etc. during work (construction), (2) Measurement of displacement of bridge piers, etc. on highways (for example, roads with heavy traffic, rivers that are not easy to cross over, etc.) In this case, it is effective when it is necessary to measure the position and displacement of the bridge pier from the opposite side with these in between, etc.) and (3) Construction inside the tunnel where sufficient lighting cannot be secured This is useful because it can be used for measuring the position and displacement in measurements during work and periodic inspections after construction.

  The embodiments according to the present invention described above are merely examples for explaining the present invention, and various modifications can be made without departing from the gist of the present invention.

1 Measurement Target 10 Reflective Sheet 10A Opening (Partial Cutout of Positioning Mark)
20 Acrylic board (translucent board)
21 Front surface of acrylic plate 22 Back surface of acrylic plate 23 Mirror surface element (reflection surface)
24 Recess (for LED)
25-28 groove 30 LED (chip type)
40 Power Supply 50 Power Switch 60 Magnet

Claims (6)

A plate-like measurement target that is attached to a measurement object and includes a reflection sheet that reflects measurement waves emitted from a measurement device,
A reflective sheet;
A translucent plate having translucency disposed on the back surface of the reflective sheet;
An illuminant that emits light when supplied with power;
Is provided,
While the light emitted from the light emitter is guided to the translucent plate ,
An opening for penetrating the front and back surfaces is provided in the reflection sheet, and a groove is provided on the front surface side of the translucent plate corresponding to the opening .   The measurement target according to claim 1, wherein a mark for alignment with a collimation on a measurement device side is provided on a reflection surface of the reflection sheet. The measurement target according to claim 2 , wherein the opening is formed so as to constitute a part of a mark for alignment with a collimation on a measurement apparatus side provided on a reflection surface of a reflection sheet. . The measurement target according to any one of claims 1 to 3, wherein the groove is filled with a diffusion member that diffuses light . 5. The light transmissive plate according to claim 1, further comprising a reflective surface that reflects light on a back surface facing a front surface on which the reflective sheet is disposed . Measurement target. The light emitter is disposed near the center of a light-transmitting plate plane, and the light emitting direction of the light emitter is disposed so as to face the reflecting surface of the light-transmitting plate. Item 6. The measurement target according to any one of Items 5 .