JP4022626B2 - LIGHT EMITTING STRUCTURE CONTAINING STRESS LIGHT EMITTING MATERIAL, AND VIBRATION SENSOR USING THE LIGHT EMITTING STRUCTURE - Google Patents

Description

  The present invention relates to a light-emitting structure that includes a stress-stimulated luminescent material that changes the light emission intensity depending on the strength of a mechanical external force and that can emit light efficiently, and a vibration sensor including the light-emitting structure.

  The inventors of the present application have been conducting research over a long period of time on materials that emit light efficiently by mechanical stimulation such as external force, unlike stimulation by ultraviolet rays, electron beams, X-rays, radiation, actinic radiation, chemical reactions, etc. . A material that emits light by such an external force is called a stress luminescent material.

  Specific examples of the stress-stimulated luminescent material include those described in Patent Document 1, Patent Document 2, Patent Document 3, Patent Document 4, and the like. These were developed by the present inventors.

In addition to the patent documents filed by the inventors of the present application, for example, Patent Document 5, Patent Document 6 and the like describe techniques regarding stress-stimulated luminescent materials. These documents describe techniques for using stress-stimulated luminescent materials in optical waveguides, artificial luminescent skin, and various devices.
JP 2000-119647 A (publication date: April 25, 2000) JP 2001-049251 A (publication date: February 20, 2001) JP 2000-313878 A (publication date: November 14, 2000) JP 2002-194349 A (publication date: July 10, 2002) JP 2003-253261 A (publication date: September 10, 2003) JP 2004-071511 A (publication date: March 4, 2004) “Piezoelectric Ceramics New Technology”, supervised by Noboru Ichinose, edited by Japan Electronic Materials Engineering, Ohmsha, 1991, p. 8

  By the way, as a vibration sensor for detecting a seismic intensity at the time of occurrence of an earthquake or a vibration sensor for remotely detecting vibration of a machine or a building structure, a sensor using a piezoelectric body is generally used. However, a vibration sensor using such a piezoelectric body requires a power source, and also requires a lead wire for connecting the power source and the sensor. In addition, such a vibration sensor has a problem that electromagnetic noise is generated (see Non-Patent Document 1).

Therefore, if a vibration sensor using the stress-stimulated luminescent material as described above that can directly convert mechanical energy into light energy without requiring a power source can be developed, there is a problem with the conventional vibration sensor as described above. The point is expected to be eliminated. However, in order to realize a vibration sensor using the stress-stimulated luminescent material, a light-emitting structure capable of detecting vibrations to a higher degree using the stress-stimulated luminescent material is required. At present, no technology is disclosed regarding a light emitting structure capable of detecting vibrations at such a high level. In the applied technology of the stress-stimulated luminescent material described in Patent Document 5 and Patent Document 6 described above, such a technique is not described.

  The present invention has been made in view of the above problems, and in a light-emitting structure including a stress-stimulated luminescent material, provides a structure that improves the luminous efficiency, and has such a structure. An object of the present invention is to provide a vibration sensor including a light emitting structure and capable of capturing vibration with high sensitivity.

  The inventors of the present application diligently studied the above problems. First, the stress luminescent material found by the inventors of the present application changes the luminescence intensity according to the magnitude of mechanical energy applied from the outside, and the luminescence intensity is a strain energy (ie, (strain) × (strain). Note that the rate of change is also proportional to That is, the inventors of the present application paid attention to the fact that the stress illuminant can be used for vibration detection by utilizing the fact that it is proportional to both the magnitude of the force applied from the outside and the rate of change.

  Furthermore, the present invention considers that it is necessary to detect vibration with higher sensitivity in order to use a stress-stimulated luminescent material for a vibration sensor. In order to obtain a structure that improves the efficiency, intensive studies were conducted. As a result, by sandwiching the light emitting member containing the stress light emitting material between the first support member having a mass larger than that of the light emitting member and the second support member having a mass larger than that of the light emitting member, It has been found that strain energy from the outside can be efficiently injected into the stress-stimulated luminescent material, and the present invention has been completed.

  That is, a light emitting structure according to the present invention is a light emitting structure including a stress light emitting material that changes the light emission intensity in proportion to the intensity of an external force, the light emitting member including the stress light emitting material, and the light emitting member. A first supporting member and a second supporting member having a larger mass than the first supporting member, wherein the light emitting member is sandwiched between the first supporting member and the second supporting member. To do.

  According to said structure, when the light emitting member containing a stress light-emitting material is pinched | interposed between the 1st and 2nd supporting member with mass larger than itself, when receiving external force, it is efficient. Can emit light. That is, by having a structure like the light emitting structure of the present invention, the energy can be efficiently injected into a stress light emitting material that emits light upon receiving mechanical energy from the outside.

  In the light emitting structure according to the present invention, it is preferable that the first support member and the second support member are made of a material having a specific gravity larger than that of the material constituting the light emitting member.

  The first support member and the second support member need to have a larger mass than the light emitting member. In order to increase the mass of the first and second support members in this way, the volume or specific gravity may be increased as compared with the light emitting member. However, as described above, the first support member and the second support member are increased. By forming the support member with a material having a specific gravity larger than that of the material constituting the light emitting member, the volume of the light emitting structure to be obtained can be reduced and made compact.

  In the light emitting structure of the present invention, the light emitting member preferably has a hollow shape. According to said structure, the mass of a light emitting member can be made smaller.

In the light emitting structure of the present invention, it is preferable that the light emitting member has a smaller volume than the first and second support members. According to said structure, the mass of a light emitting member can be made still smaller.

  In order to reduce the volume of the light emitting member as compared with the volumes of the first and second support members, the first support member, the light emitting member, and the second support member are arranged in this order. With respect to the length in the arrangement direction and / or the length in the direction orthogonal to the arrangement direction (that is, the direction perpendicular to the cross section of the light emitting structure shown in FIG. 1), the dimensions of the light emitting member are What is necessary is just to make it smaller than the dimension of the 1st and 2nd supporting member. Further, the thickness of the light emitting member may be smaller than that of the first and second support members.

  Further, in the light emitting structure of the present invention, the first support member and the second support member are connected to each other at an end portion not adjacent to the light emitting member to constitute a connection support member, Accordingly, it is preferable that the light emitting structure forms a resonator.

  In the light emitting structure of the present invention, when the first and second support members are connected to form a resonator, a large displacement occurs at the end surfaces of the first support member and the second support member at the resonance frequency of the support member. Therefore, a large stress acts on the light emitter sandwiched therebetween. Therefore, when the vibration to be detected matches the resonance frequency of the support member, the sensitivity is higher than when the light emitter is simply sandwiched between the support members.

  In the light emitting structure of the present invention, it is preferable that the light emitting member further includes a polymer organic material. Here, the high molecular organic material is, for example, plastic, rubber, resin, or the like.

  According to said structure, a light emitting member comes to have a softness | flexibility and plasticity, The shape can be changed variously. Moreover, the specific gravity can be made small compared with the case where a light emitting member is comprised only with stress luminescent material.

  In the light emitting structure of the present invention, the first support member and the second support member are preferably formed of any one of metal, glass, and ceramics.

  According to the configuration described above, even when the light emitting structure is used for a vibration sensor or the like, sufficient strength to withstand vibration can be secured. In addition, when the organic light emitting material is included in the light emitting member, the first and second support members are made of metal such as steel or stainless steel, glass, or ceramics, so that the light emitting member is compared with the light emitting member. Thus, the mass can be sufficiently increased.

  In the light emitting structure of the present invention, it is preferable that at least one of the first support member and the second support member is formed of a transparent material.

  Here, the “transparent material” is a material that is transparent or translucent to such an extent that light emitted on one side of the material can be detected on the other side through the material. Means that. The “transparent material” includes resins such as glass and polycarbonate.

  According to said structure, the 1st and 2nd supporting member itself formed with the transparent material can be utilized as an optical waveguide which transmits the light emitted in a light emitting member to the exterior. Therefore, when the light emitting structure is used for a vibration sensor or the like, the structure can be simplified.

Moreover, in the light emitting structure of the present invention, the light emitting member has a rod shape or a linear shape,
And it is preferable that it is coil shape.

  In the light emitting structure of the present invention, the light emitting material is mixed with a transparent resin or the like to form a rod or a linear fiber, and when this is made into a coiled structure, the elastic coefficient becomes small. The influence on the resonance frequency can be suppressed. In the coil shape, since the stress applied to the light emitter acts on the light emitting member as a shear stress throughout, the light emitter is easily deformed, and light can be emitted efficiently.

  In the light emitting structure of the present invention, when the light emitting member is coiled, the first support member or the second support member is attached to both ends of the coil.

  A light-emitting structure according to the present invention is a light-emitting structure including a stress-luminescent material that changes the light emission intensity in proportion to the intensity of external force, in addition to those having the above-described structures, and has a hollow shape. A stress luminescent material may be applied to the outer surface and / or the inner surface of the support member.

  As described above, when the support member has a hollow shape having a cavity inside, the support member has directivity with respect to external vibrations that cause resonance. Therefore, when a stress luminescent material is applied to the inner surface or the outer surface of such a support member, a vibration sensor having directivity that emits light only with respect to vibration from a certain direction can be configured. In addition, as said hollow shape, a cylindrical shape and a rectangular cylindrical thing can be mentioned, for example. Further, the outer surface of the support member is a surface that forms the outer shape of the support member, and the inner surface of the support member means a surface that forms a cavity in the support member.

  The vibration sensor according to the present invention includes any one of the above-described light emitting structures as a detection unit for detecting vibration.

  The vibration sensor described above has an advantage that it does not need to be connected to a power source because it has a stress-stimulated luminescent material having a property of emitting light without a power source as a detection unit. That is, there is no need to consider various problems such as electromagnetic noise problems, power supply problems, and lead wire problems in a vibration sensor using a conventional piezoelectric body.

  Furthermore, according to the vibration sensor of the present invention, the vibration can be detected with high sensitivity, and the emission intensity that is an index of the magnitude of vibration can be remotely detected from a remote location. It can be used effectively for geological inspection.

  As described above, the light emitting structure according to the present invention has a structure in which a light emitting member including a stress light emitting material is sandwiched between first and second support members having a mass larger than that of itself. Therefore, there is an effect that light can be emitted efficiently when receiving external force. That is, by having a structure like the light emitting structure of the present invention, the energy can be efficiently injected into a stress light emitting material that emits light upon receiving mechanical energy from the outside.

  Moreover, the vibration sensor concerning this invention has the light emission structure of this invention as a detection part for detecting a vibration as mentioned above.

  The vibration sensor has an advantage that it does not need to be connected to a power source because it has a stress-stimulated luminescent material having a property of emitting light without a power source as a detection unit. Furthermore, since the vibration sensor of the present invention can detect vibration with high sensitivity, it can be used effectively when an earthquake occurs or when a geological inspection is performed.

  Embodiments of the present invention will be described below, but the present invention is not limited to this description. In this embodiment, first, some examples of the light emitting structure according to the present invention will be described, and then the vibration sensor according to the present invention will be described.

(1) About the light emitting structure of the present invention The light emitting structure according to the present invention includes a stress light emitting material that changes the light emission intensity in proportion to the intensity of the external force. The light emitting structure includes a light emitting member made of a material containing the stress light emitting material, and a first support member and a second support member having a mass larger than that of the light emitting member. In this light emitting structure, the light emitting member has a structure sandwiched between the first support member and the second support member.

  Here, the above “light emitting structure” means a structure that itself emits light by an external stimulus. 1 to 5 show examples of the light emitting structure according to the present invention.

  First, the light emitting structure shown in FIG. 1 will be described. A light emitting structure 10 shown in FIG. 1 includes a first support member 1, a light emitting member 2, and a second support member 3. The light emitting member 2 is sandwiched between the first support member and the second support member.

  In the light emitting structure according to the present invention, the state in which the light emitting member 2 is sandwiched between the two support members 1 and 3 means that one end surface of the two opposing end surfaces of the light emitting member 2 is the first. Means that the other end face is adjacent to the second support member 3. For example, when the shape of the light emitting member 2 is a rectangular parallelepiped, any two opposing faces of the six faces of the rectangular parallelepiped are adjacent to the two support members 1 and 3, respectively. The two opposing faces adjacent to each of the support members 1 and 3 may be arbitrarily selected from six faces of a rectangular parallelepiped, but the luminous efficiency of the resulting light emitting structure is improved, and the structure is In order to be strong and stable, it is preferable that two opposing surfaces having larger areas are adjacent to the first and second support members 1 and 3, respectively.

  In the light emitting structure 10 of the present invention, in order to form a structure in which the light emitting member 2 is sandwiched between the first support member 1 and the second support member 3, a conventionally known structure such as a silicon adhesive is used. What is necessary is just to fix each other using an adhesive agent.

  Further, the mass of the first support member 1 and the second support member 3 constituting the light emitting structure 10 of the present invention is characterized by being larger than the mass of the light emitting member 2. As described above, the light emitting structure 10 according to the present invention has a structure in which the light emitting member 2 including the stress light emitting material is sandwiched between the first and second support members 1 and 3 having a larger mass than itself. Thus, light can be emitted efficiently when an external force is applied. That is, by having a structure like the light emitting structure 10 of the present invention, the energy can be efficiently injected into a stress light emitting material that emits light by receiving mechanical energy from the outside.

Here, various materials included in the light emitting member 2 constituting the light emitting structure 10 of the present invention will be described. As described above, the light emitting member 2 includes a stress light emitting material. Here, the “stress luminescent material” is a luminescent material that emits light by stress. That is, the stress-stimulated luminescent material has a property that the material itself emits light in response to a stimulus of a mechanical external force, and also has a property that the luminescence intensity is changed in proportion to the intensity of the external force. Specific examples of the stress-stimulated luminescent material include the stress-stimulated luminescent materials described in Patent Documents 1 to 4 described above and those described in Japanese Patent No. 3273317 and Japanese Patent No. 2999631. For the stress-stimulated luminescent material, inorganic materials such as aluminate and silicate are generally used.

  The light emitting member 2 preferably contains a polymer organic material such as plastic, rubber, resin, etc. in addition to the above stress light emitting material. Thereby, the light emitting member comes to have flexibility and plasticity, and can be molded by changing its shape in various ways. Moreover, the specific gravity can be made small compared with the case where a light emitting member is comprised only with stress luminescent material.

  When the light emitting member 2 includes a stress light emitting material and a polymer organic material, the light emitting member 2 is mixed uniformly after the stress light emitting material is mixed in the liquid polymer organic material. It may be formed by curing. The light emitting member 2 has a basic structure of a polymer organic material such as molded plastic, rubber, resin, or an organic material such as paper, wood, bamboo, etc. having a low specific gravity. A laminated structure in which a film made of a mixture of a stress light emitting material and a polymer organic material is formed on the surface of the structure may be used. Note that the light-emitting member of the light-emitting structure manufactured in the examples has such a laminated structure.

  Further, when the light emitting structure 10 according to the present invention is used for vibration or wind detection in a high temperature environment, a basic structure made of a high temperature resistant material and an inorganic stress light emitting material on the surface of the basic structure. What is necessary is just to form the light-emitting member 2 of the laminated structure in which is applied. In addition, when the light emitting structure 10 of the present invention is intended to detect vibrations having a high frequency, it is effective to use a ceramic film containing a stress light emitting material as the light emitting member 2.

  Next, the material which comprises the 1st supporting member 1 and the 2nd supporting member 3 is demonstrated. In the present invention, each of the supporting members 1 and 3 is required to have a mass larger than that of the light emitting member 2. Therefore, the first and second support members 1 and 3 are preferably formed of a material having a specific gravity greater than that of the material constituting the light emitting member 2. Thus, the volume of the resulting light emitting structure is reduced and made compact by forming the first support member and the second support member with a material having a specific gravity greater than that of the material constituting the light emitting member. Can do.

  More specifically, examples of the material constituting the first and second support members 1 and 3 include metals, glasses, and ceramics. Examples of the metal include steel and stainless steel. When each of the support members 1 and 3 is made of the material as described above, sufficient strength to withstand vibration can be ensured even when the light emitting structure is used for a vibration sensor or the like. . In addition, when the organic light emitting material is included in the light emitting member, the first and second support members are made of metal such as steel or stainless steel, glass, or ceramics, so that the light emitting member is compared with the light emitting member. Thus, the mass can be sufficiently increased.

  Note that the first support member 1 and the second support member 3 may be made of different materials as long as each of the first support member 1 and the second support member 3 has a larger mass than the light emitting member 2. However, when the light emitting structure 10 is used as a vibration sensor, the first and second support members 1 and 3 are preferably formed of the same material in order to detect vibration more accurately. .

  In the light emitting structure of the present invention, it is preferable that at least one of the first support member 1 and the second support member 3 is formed of a transparent material. According to this, the first and second support members 1 and 3 themselves formed of a transparent material can be used as an optical waveguide that transmits light emitted from the light emitting member 2 to the outside. Therefore, when the light emitting structure 10 is used for a vibration sensor or the like, the structure can be simplified.

Subsequently, the first support member 1, the light emitting member 2, and the second support member 3 constituting the light emitting structure 10.
Each shape will be described. As described above, in the light emitting structure 10 according to the present invention, it is necessary that the mass of the first and second support members 1 and 3 is larger than the mass of the light emitting member 2. Therefore, the volume of the light emitting member 2 is preferably smaller than the volumes of the first and second support members.

  And as an example of the structure for making the volume of the light emitting member 2 smaller than the volumes of the first and second support members, as shown in FIG. 1, the first support member 1, the light emitting member 2, In addition, regarding the length of each member in the arrangement direction (direction indicated by A in FIG. 1) arranged side by side in the order of the second support member 3, the dimension of the light emitting member 2 is set to the first and second support. What is necessary is just to make it smaller than the dimension of the members 1-3.

  FIG. 1 shows only the arrangement direction (A direction) of each member. In the light emitting structure 10, in the direction orthogonal to the arrangement direction (that is, in the cross section of the light emitting structure shown in FIG. 1). The length of each member in a direction perpendicular to the direction (hereinafter, this direction is referred to as B direction) is not mentioned. However, in order to make the volume of the light emitting member 2 smaller than the volumes of the first and second support members 1 and 3, the length of each member in the B direction is also the same as that of the light emitting member 2. It is also possible to make the dimensions smaller than the dimensions of the first and second support members 1 and 3.

  FIG. 2 shows an example in which the shape of the light emitting member 2 is made hollow in order to make the volume of the light emitting member 2 smaller than the volumes of the first and second support members. In FIG. 2, only the cross-sectional shape is shown, but the light emitting member 2 here has a hollow cylindrical shape. Moreover, about the 1st and 2nd supporting members 1 * 3, it has a rectangular parallelepiped shape similarly to the case shown in FIG.

  As shown in FIG. 2, by making the shape of the light emitting member 2 hollow, the volume is reduced, and thus the mass can be further reduced. Further, since the light emitting member 2 has a cylindrical shape, the surface area exposed to the outside can be increased when sandwiched between the first support member 1 and the second support member 3. As a result, the light emission area is increased, so that the light emission efficiency can be improved. Further, the above structure is an advantageous structure for maintaining the mechanical strength of the light emitting structure 10. In addition, when making the shape of the light emitting member 2 hollow, a material obtained by mixing a stress organic light emitting material with a polymer organic material is used as a material, which is poured into a mold for forming a desired shape and cured. It may be formed by.

  In order to further increase the surface area of the light emitting member 2 and reduce its volume, it is preferable that the light emitting member 2 has an elongated rod shape or a linear shape and a coil shape. As a result, the light emission area is increased and vibration is easily caused, so that the light emission efficiency can be further improved.

  Further, in FIG. 3, in order to make the volume of the light emitting member 2 smaller than the volumes of the first and second support members, the thickness of the light emitting member 2 is set to the first and second support members 1. An example in which the thickness is smaller than 3 is shown. The thickness of each member here means the direction indicated by C in FIG. As a specific example of the light emitting structure as shown in FIG. 3, the light emitting member has a diaphragm-like structure.

  In the light emitting structure 10 shown in FIG. 3, the length of the second support member 3 in the A direction is longer than the length of the first support member 1 in the A direction. As a result, the volume of the second support member 3 is larger.

Furthermore, the light emitting structure 10 of the present invention includes a plurality of structure units 10a · 1 as shown in FIG.
0b may be arranged side by side. The light-emitting structure 10 shown in FIG. 4 includes a light-emitting structure having a different thickness as shown in FIG. 3 as a structure unit 10a, and a light-emitting structure as shown in FIG. 1 as a structure unit 10b. Are arranged side by side. FIG. 4 shows an example in which two structural units having different shapes are arranged side by side, but this is merely an example, and in the present invention, a light emitting structure in which three or more structural units are arranged side by side. In addition, the light emitting structure may be configured using a plurality of structural body units having the same shape.

  The light emitting structure including a plurality of structure units as described above has an advantage that vibrations at a wide frequency can be detected.

  Further, as shown in FIG. 5, the light emitting structure of the present invention is such that the first support member and the second support member are connected to each other at the end not adjacent to the light emitting member 2. 4 so that the light emitting structure 20 forms a resonator.

  In addition, as an example of the shape of the light emitting structure obtained by connecting the first support member and the second support member in this way, an annular shape as shown in FIG. 5A, FIG. A rectangular shape as shown in FIG. 5 or a tuning fork shape as shown in FIG. 5C can be mentioned, but the shape is not limited to these, and an appropriate shape can be selected according to the application. In the light emitting structure 20 shown in each drawing of FIG. 5, a support member obtained by connecting the end portion of the first support member and the end portion of the second support member is shown as the connection support member 4.

  The light emitting structure according to the present invention is a light emitting structure including a stress light emitting material that changes the light emission intensity in proportion to the intensity of external force, in addition to the light emitting structure having the structures described above. Further, a stress-stimulated luminescent material may be applied to the outer surface and / or the inner surface of the hollow support member.

  Here, the “hollow support member” has, for example, the shape shown in FIG. 5A to FIG. 5C, and does not include the light emitting member, and is composed entirely of the support member. Can be mentioned. And about the raw material used for this support member, the same thing as the above-mentioned light emitting structure can be used. The coating applied to the outer surface and / or the inner surface of the support member includes not only a stress-stimulated luminescent material but also a polymer organic material contained in the luminescent member. It may be. That is, as the paint, those applicable to the light emitting member can be used in the same manner.

  As described above, when the support member has a hollow shape having a cavity inside, the support member has directivity with respect to external vibrations that cause resonance. Therefore, when a stress luminescent material is applied to the inner surface or the outer surface of such a support member, a vibration sensor having directivity that emits light only with respect to vibration from a certain direction can be configured.

  As described above, in the light emitting structure according to the present invention, the light emitting member including the stress light emitting material is sandwiched between the first and second supporting members having a mass larger than that of the light emitting member. Can emit light efficiently. That is, by having a structure like the light emitting structure of the present invention, the energy can be efficiently injected into a stress light emitting material that emits light upon receiving mechanical energy from the outside.

  Therefore, the light emitting structure of the present invention emits light using a detection unit such as a vibration sensor that can detect vibration with high sensitivity, a pressure sensor that can detect a change in atmospheric pressure or water pressure, or wind power. It can be used as a lamp and a light emitter of a display device.

(2) Next, the vibration sensor according to the present invention will be described. The vibration sensor of the present invention includes the above-described light emitting structure as a detection unit for detecting vibration.

  That is, since the vibration sensor of the present invention includes a light emitting structure having a stress light emitting material that can obtain the magnitude of vibration as the light emission intensity as a detection unit, the light emission intensity is used as an index of the vibration magnitude. It can be. As described above, since the light emitting structure according to the present invention can capture vibration with high sensitivity, the vibration sensor according to the present invention configured using this also detects vibration with high sensitivity. be able to.

  In the vibration sensor of the present invention, the emission intensity when vibration is generated can be detected remotely by recording with an image recording device or the like, as will be described later in the examples. If such an image recording apparatus has a system capable of detecting the intensity of light emission, the image recording apparatus detects the light emission intensity, thereby detecting the magnitude of vibration, wind power, etc. Can do. In the image recording apparatus, a system that has been conventionally used may be used as a system that can detect the intensity of light emission.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. That is, embodiments obtained by combining technical means appropriately changed within the scope of the claims are also included in the technical scope of the present invention.

  Examples of the present invention will be described below.

[Example 1]
In Example 1, a light emitting structure that can be used as a wind lamp was manufactured using a stress light emitting material. The light-emitting structure manufactured in this example has a cross-sectional shape as shown in FIG. 2 in which first and second support members are attached to both ends of a light-emitting member having a circular cross section (however, the light-emitting member Is not hollow).

In this example, powdered Sr _0.9 Al ₂ O ₄ : Eu 0.05% was used as the stress-stimulated luminescent material. The stress-stimulated luminescent material was manufactured according to the method described in Patent Document 1 described above.

Next, the obtained stress luminescent material powder was uniformly mixed with a transparent resin (epoxy two-component type, manufactured by Struers), and this mixture was applied to the surface of a plastic fiber having a cross-sectional diameter of 3 mm. The resin was cured by drying. Thus, a light emitting member in which a mixture of a stress light emitting material and a resin was laminated on a plastic fiber was obtained.

  Subsequently, stainless steel rods were attached to both ends of the fiber-like light-emitting member as first and second support members to produce a light-emitting structure.

  This light emitting structure was suspended in the air, and wind was sent to the light emitting structure. As a result, the light emitting structure was shaken and brightly emitted by the stress light emitting material contained in the structure, and the emitted light could be recorded by the image recording apparatus. From this result, it was shown that the light-emitting structure can be used as a lamp using wind power. In addition, by using the light emitting structure that emits light by the wind as the bone of the fan, it is possible to make a fan that glows with bending strain.

[Example 2]
In Example 2, a light emitting structure that can be used as a vibration sensor was manufactured using a stress light emitting material. The light-emitting structure manufactured in this example has a cross-sectional shape as shown in FIG. 2 in which first and second support members are attached to both ends of a light-emitting member having a circular cross section (however, the light-emitting member Is not hollow).

In this example, powdered Sr _0.9 Al ₂ O ₄ : Eu 0.05% was used as the stress-stimulated luminescent material. The stress-stimulated luminescent material was manufactured according to the method described in Patent Document 1 described above.

  Next, after the powder of the stress-stimulated luminescent material obtained was uniformly mixed with a transparent resin (acrylic two-component type), this mixture was applied to the surface of a plastic fiber having a cross-sectional diameter of 3 mm and dried at room temperature. The resin was cured. Thus, a light emitting member in which a mixture of a stress light emitting material and a resin was laminated on a plastic fiber was obtained.

  Subsequently, stainless steel plates with magnets were attached to both ends of the fiber-like light emitting member as first and second support members to produce a light emitting structure.

  Subsequently, this light emitting structure was attached to a vibrating machine via a magnet, and an investigation was made as to whether or not light was emitted by vibration. As a result, in the light emitting structure having the above-described structure, vibration is increased in the light emitting member sandwiched between the first and second support members, and the light emitting structure emits light even with slight vibration. Was confirmed. The emitted light could be recorded remotely by the image recording apparatus. If the image recording apparatus has a system that can detect the intensity of light emission, the image recording apparatus can detect the intensity of light emission and thereby detect the magnitude of vibration. It is done.

  From this result, it was shown that the light emitting structure can be used as a vibration sensor capable of detecting vibration with high sensitivity.

  In this example, each of the light emitting structures having the structures as shown in FIGS. 1 to 5 was similarly investigated, and it was confirmed that high light emission was obtained by vibration.

  The light emitting structure of the present invention has a structure capable of efficiently injecting energy into a stress light emitting material included in the light emitting structure when mechanical energy such as strain energy is received from the outside. Therefore, the light emitting structure includes a vibration sensor for detecting vibrations in earthquakes and geological inspections, a vibration sensor for remotely detecting machine vibrations and building vibrations, lamps and display devices that emit light using wind power, It can be widely used for pressure sensors for detecting fluctuations in atmospheric pressure and water pressure.

It is sectional drawing which shows an example of the light emitting structure concerning this invention. It is sectional drawing which shows the other example of the light-emitting structure concerning this invention. It is sectional drawing which shows the further another example of the light-emitting structure concerning this invention. It is sectional drawing which shows the further another example of the light-emitting structure concerning this invention. (A)-(c) is sectional drawing which shows the further another example of the light-emitting structure concerning this invention. In this figure, a first support member and a second support member are connected to form a connection support member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st support member 2 Light emitting member 3 2nd support member 4 Connection support member 10 Light emitting structure 20 Light emitting structure

Claims (14)

Ri Na contains stress luminescent material that changes the light emission intensity in proportion to the intensity of the external force, a light-emitting structure used as a detector for detecting the vibration in the vibration sensor,
A light emitting member including the stress-stimulated luminescent material, and a first support member and a second support member having a mass larger than that of the light emitting member,
The light emitting member is sandwiched between the first support member and the second support member ,
The light emitting structure according to claim 1, wherein the first support member and the second support member are made of a material having a specific gravity greater than that of the material constituting the light emitting member . A light-emitting structure comprising a stress-stimulated luminescent material that changes the luminescence intensity in proportion to the intensity of an external force, and used as a detection unit for detecting vibration in a vibration sensor,
A light emitting member including the stress-stimulated luminescent material, and a first support member and a second support member having a mass larger than that of the light emitting member,
The light emitting member is sandwiched between the first support member and the second support member,
The light- emitting structure is characterized in that the light- emitting member has a hollow shape . A light-emitting structure comprising a stress-stimulated luminescent material that changes the luminescence intensity in proportion to the intensity of an external force, and used as a detection unit for detecting vibration in a vibration sensor,
A light emitting member including the stress-stimulated luminescent material, and a first support member and a second support member having a mass larger than that of the light emitting member,
The light emitting member is sandwiched between the first support member and the second support member,
The first support member and the second support member are connected to each other at an end portion that is not adjacent to the light emitting member to form a connection support member, whereby the light emitting structure serves as a resonator. A light emitting structure which is formed . A light-emitting structure comprising a stress-stimulated luminescent material that changes the luminescence intensity in proportion to the intensity of an external force, and used as a detection unit for detecting vibration in a vibration sensor,
A light emitting member including the stress-stimulated luminescent material, and a first support member and a second support member having a mass larger than that of the light emitting member,
The light emitting member is sandwiched between the first support member and the second support member,
The light emitting structure further includes a polymer organic material in the light emitting member. A light-emitting structure comprising a stress-stimulated luminescent material that changes the luminescence intensity in proportion to the intensity of an external force, and used as a detection unit for detecting vibration in a vibration sensor,
A light emitting member including the stress-stimulated luminescent material, a first support member and a second support member having a mass larger than that of the light emitting member,
The light emitting member is sandwiched between the first support member and the second support member,
The light emitting structure according to claim 1, wherein the light emitting member has a rod shape or a linear shape, and a coil shape . The light emitting structure according to claim 1, wherein the light emitting member has a hollow shape . The light emitting structure according to claim 1, 2, 4, 5, or 6 , wherein the light emitting member has a smaller volume than the first and second support members . The first support member and the second support member are connected to each other at an end portion that is not adjacent to the light emitting member to form a connection support member, whereby the light emitting structure serves as a resonator. The light emitting structure according to claim 1, wherein the light emitting structure is formed. The light emitting structure according to claim 1, 2, 3, 5, 6, 7, or 8 , wherein the light emitting member further contains a polymer organic material . The light emitting structure according to any one of claims 1 to 9, wherein the first support member and the second support member are formed of any one of metal, glass, and ceramics. The light emitting structure according to any one of claims 1 to 10, wherein at least one of the first support member and the second support member is formed of a transparent material. . The shape of the light emitting member is a rod shape or a line shape, and is a coil shape. The light emitting structure as described. A light emitting structure comprising a stress light emitting material that changes the light emission intensity in proportion to the intensity of an external force, and used as a detection unit for detecting vibration in a vibration sensor,
A light-emitting structure characterized in that a stress-stimulated luminescent material is applied to an outer surface and / or an inner surface of a hollow support member. A vibration sensor comprising the light emitting structure according to any one of claims 1 to 13 as a detection unit for detecting vibration.

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